Patent Publication Number: US-2022221206-A1

Title: Refrigerant management system and refrigerant management method

Description:
TECHNICAL FIELD 
     The present disclosure relates to a system and a method for refrigerant management. 
     BACKGROUND ART 
     As disclosed in Patent Literature 1 (JP 2015-125672 A), there has been conventionally known a system configured to manage a refrigerant for reuse or the like of the refrigerant in accordance with information on a fluorocarbon refrigerant having been delivered or to be delivered to a fluorocarbon collection worker. 
     SUMMARY OF THE INVENTION 
     Technical Problem 
     There is a problem of difficulty in management of the refrigerant until being delivered to the collection worker and appropriate supply of the refrigerant to a demander for the refrigerant. 
     Solutions to Problem 
     A refrigerant management system according to a first aspect includes one or a plurality of computers. The computer includes an acquisition unit and a generation unit. The acquisition unit acquires first information, refrigerant already filled quantity, and refrigerant used quantity The generation unit generates second information. The first information includes device specifying information for specifying a refrigerant use device, worker information on a worker to execute work relevant to the refrigerant use device, and refrigerant additionally filled quantity information including refrigerant additionally filled quantity that is refrigerant quantity additionally filled in the refrigerant use device. The refrigerant already filled quantity is refrigerant quantity preliminarily filled in the refrigerant use device. The refrigerant used quantity is refrigerant quantity used in the refrigerant use device. The second information associates the refrigerant used quantity with the worker. The acquisition unit acquires the first information during at least one of installation and maintenance of the refrigerant use device. The acquisition unit acquires the refrigerant already filled quantity in accordance with the device specifying information in the first information thus acquired. The acquisition unit acquires the refrigerant used quantity by totaling the refrigerant already filled quantity thus acquired and the refrigerant additionally filled quantity included in the refrigerant additionally filled quantity information in the first information thus acquired. The generation unit generates the second information from the refrigerant used quantity acquired by the acquisition unit and the worker information in the first information acquired by the acquisition unit. 
     The refrigerant management system according to the first aspect can manage the refrigerant not yet delivered to a collection worker. 
     A refrigerant management system according to a second aspect is the system according to the first aspect, in which the computer further includes a storage unit. The storage unit stores the refrigerant already filled quantity in association with the device specifying information. The acquisition unit acquires the refrigerant already filled quantity stored in the storage unit in accordance with the device specifying information in the first information thus acquired. 
     The refrigerant management system according to the second aspect can acquire refrigerant quantity used in the refrigerant use device. 
     A refrigerant management system according to a third aspect is the system according to the first aspect, in which the acquisition unit acquires ability information on ability of the refrigerant use device in accordance with the device specifying information in the first information thus acquired, and acquires the refrigerant already filled quantity in accordance with the ability information thus acquired. 
     The refrigerant management system according to the third aspect can acquire a predictive value of refrigerant quantity preliminarily filled in the refrigerant use device. 
     A refrigerant management system according to a fourth aspect is the system according to the first aspect, in which the acquisition unit acquires input data including ability information on ability of the refrigerant use device, and acquires the refrigerant already filled quantity in accordance with the ability information included in the input data. 
     The refrigerant management system according to the fourth aspect can acquire a predictive value of refrigerant quantity preliminarily filled in the refrigerant use device. 
     A refrigerant management system according to a fifth aspect is the system according to the first aspect, in which, when the refrigerant already filled quantity is stored in association with the device specifying information, the acquisition unit acquires the refrigerant already filled quantity being stored in accordance with the device specifying information in the first information thus acquired. When the refrigerant already filled quantity is not stored in association with the device specifying information, the computer acquires ability information on ability of the refrigerant use device in accordance with the device specifying information in the first information thus acquired, and acquires the refrigerant already filled quantity in accordance with the ability information thus acquired. 
     The refrigerant management system according to the fifth aspect can acquire an appropriate value applicable as refrigerant quantity preliminarily filled in the refrigerant use device. 
     A refrigerant management system according to a sixth aspect is the system according to any one of the first to fifth aspects, in which the acquisition unit acquires total refrigerant used quantity of a plurality of the refrigerant use devices serving as work targets of the worker, in accordance with a plurality of pieces of the first information. The generation unit further generates, as the second information, information associating the total quantity acquired by the acquisition unit and the worker. 
     The refrigerant management system according to the sixth aspect can manage, in association with each worker, refrigerant quantity filled and used in all the refrigerant use devices serving as work targets of the worker. 
     A refrigerant management system according to a seventh aspect is the system according to any one of the first to sixth aspects, in which the acquisition unit acquires refrigerant to-be-collected quantity that is refrigerant quantity to be collected from the refrigerant use device within a predetermined period in accordance with the first information. The generation unit further generates, as the second information, information associating the refrigerant to-be-collected quantity acquired by the acquisition unit and the worker. 
     The refrigerant management system according to the seventh aspect can manage refrigerant quantity expected to be collected from the refrigerant use device. 
     A refrigerant management system according to an eighth aspect is the system according to the seventh aspect, in which the first information further includes third information. The acquisition unit acquires the refrigerant to-be-collected quantity in accordance with the third information. The third information includes a work day or a work month of execution of at least one of installation work during installation of the refrigerant use device and maintenance work during maintenance of the refrigerant use device. 
     The refrigerant management system according to the eighth aspect can apply the refrigerant to-be-collected quantity as an appropriate predictive value of refrigerant quantity to be collected from the refrigerant use device within a predetermined period. 
     A refrigerant management system according to a ninth aspect is the system according to the eighth aspect, in which the acquisition unit acquires the refrigerant to-be-collected quantity in accordance with refrigerant quantity used in the refrigerant use device after elapse of the predetermined period since the work day or the work month included in the third information. 
     The refrigerant management system according to the ninth aspect can apply the refrigerant to-be-collected quantity as an appropriate predictive value of refrigerant quantity to be collected from the refrigerant use device within the predetermined period. A refrigerant management system according to a tenth aspect is the system according to any one of the first to sixth aspects, in which the computer further includes an evaluation unit. The evaluation unit evaluates the worker in accordance with at least one of the number of the refrigerant use devices serving as work targets of the worker and the refrigerant used quantity that is refrigerant quantity used in the refrigerant use devices serving as the work targets of the worker. 
     The refrigerant management system according to the tenth aspect can appropriately supply the refrigerant to the worker needing the refrigerant. 
     A refrigerant management system according to an eleventh aspect is the system according to the tenth aspect, in which the evaluation unit evaluates the worker in accordance with the second information generated by the generation unit. 
     The refrigerant management system according to the eleventh aspect can appropriately calculate refrigerant quantity suppliable to each worker. 
     A refrigerant management system according to a twelfth aspect is the system according to the eleventh aspect, in which the acquisition unit acquires refrigerant to-be-collected quantity that is refrigerant quantity to be collected from the refrigerant use device within a predetermined period in accordance with the refrigerant used quantity thus acquired. The generation unit further generates, as the second information, information associating the refrigerant to-be-collected quantity acquired by the acquisition unit and the worker. The evaluation unit evaluates the worker in accordance with the refrigerant to-be-collected quantity 
     The refrigerant management system according to the twelfth aspect can appropriately calculate refrigerant quantity suppliable to each worker. 
     A refrigerant management system according to a thirteenth aspect is the system according to the twelfth aspect, in which the first information further includes third information including a work day or a work month of execution of at least one of installation work during installation of the refrigerant use device and maintenance work during maintenance of the refrigerant use device. The acquisition unit acquires the refrigerant to-be-collected quantity in accordance with refrigerant quantity used in the refrigerant use device after elapse of a predetermined period since the work day or the work month included in the third information. 
     The refrigerant management system according to the thirteenth aspect can apply the refrigerant to-be-collected quantity as an appropriate predictive value of refrigerant quantity to be collected from the refrigerant use device within the predetermined period. 
     A refrigerant management system according to a fourteenth aspect is the system according to the twelfth or thirteenth aspect, in which the evaluation unit calculates refrigerant quantity suppliable to the worker in accordance with the refrigerant to-be-collected quantity 
     The refrigerant management system according to the fourteenth aspect can appropriately calculate refrigerant quantity suppliable to each worker. 
     A refrigerant management system according to a fifteenth aspect is the system according to any one of the twelfth to fourteenth aspects, in which the acquisition unit acquires refrigerant collected quantity that is refrigerant quantity collected from the refrigerant use device. The evaluation unit evaluates the worker in accordance with the refrigerant collected quantity and the refrigerant to-be-collected quantity, and calculates refrigerant quantity suppliable to the worker. 
     The refrigerant management system according to the fifteenth aspect can appropriately supply the refrigerant to the worker needing the refrigerant. 
     A refrigerant management system according to a sixteenth aspect is the system according to the fifteenth aspect, in which the acquisition unit acquires refrigerant supplied quantity that is refrigerant quantity supplied to the worker. The evaluation unit evaluates the worker in accordance with the refrigerant collected quantity, the refrigerant supplied quantity, and the refrigerant to-be-collected quantity, and calculates refrigerant quantity suppliable to the worker. 
     The refrigerant management system according to the sixteenth aspect can appropriately supply the refrigerant to the worker needing the refrigerant. 
     A refrigerant management system according to a seventeenth aspect is the system according to any one of the eleventh to sixteenth aspects, in which the acquisition unit acquires refrigerant regenerated quantity that is refrigerant quantity collected from the refrigerant use device and regenerated. The evaluation unit evaluates the worker in accordance with the refrigerant regenerated quantity and the refrigerant used quantity 
     The refrigerant management system according to the seventeenth aspect can appropriately supply the refrigerant to the worker needing the refrigerant. 
     A refrigerant management method according to an eighteenth aspect includes acquiring first information, acquiring refrigerant already filled quantity, acquiring refrigerant used quantity, and generating second information. The first information includes device specifying information for specifying a refrigerant use device, worker information on a worker to execute work relevant to the refrigerant use device, and refrigerant additionally filled quantity information including refrigerant additionally filled quantity that is refrigerant quantity additionally filled in the refrigerant use device. The refrigerant already filled quantity is refrigerant quantity preliminarily filled in the refrigerant use device. The refrigerant used quantity is refrigerant quantity used in the refrigerant use device. The second information associates the refrigerant used quantity and the worker. The method includes acquiring the first information during at least one of installation and maintenance of the refrigerant use device. The method includes acquiring the refrigerant already filled quantity in accordance with the device specifying information in the first information thus acquired. The method includes acquiring the refrigerant used quantity by totaling the refrigerant already filled quantity thus acquired and the refrigerant additionally filled quantity included in the refrigerant additionally filled quantity information in the first information thus acquired. The method includes generating the second information from the refrigerant used quantity thus acquired and the worker information in the first information thus acquired. 
     The refrigerant management method according to the eighteenth aspect enables management of the refrigerant not yet delivered to a collection worker. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of a refrigerant circulation cycle. 
         FIG. 2  is a view depicting a network configuration of a refrigerant management system  100 . 
         FIG. 3  is a schematic view depicting an entire configuration of the refrigerant management system  100 . 
         FIG. 4  is a block diagram of input terminals  10   a,    10   b,  . . . , a manager terminal  80 , and a management server  20 . 
         FIG. 5  is an explanatory chart of a device information database DB 1 . 
         FIG. 6  is a chart indicating work contents for respective workers. 
         FIG. 7  is a flowchart depicting acquisition of refrigerant already filled quantity 
         FIG. 8  is an explanatory view of second information generated from first information acquired by the management server  20  upon input of an installation worker C 1 . 
         FIG. 9  is an explanatory view of second information generated from first information acquired by the management server  20  upon input of a maintenance worker C 1 . 
         FIG. 10  is an explanatory view of first information acquired by the management server  20  upon input of a collection worker C 1 . 
         FIG. 11  is an explanatory view of first information acquired by the management server  20  upon input of a regeneration worker C 4 . 
         FIG. 12  is an explanatory view of first information acquired by the management server  20  upon input of a distribution worker C 5 . 
         FIG. 13  is an explanatory chart of exemplary second information with access authority only for a manager S. 
         FIG. 14  is an explanatory view of first information acquired by the management server  20  upon input of a discard worker C 9 . 
         FIG. 15  is an explanatory chart of second information according to a modification example B. 
         FIG. 16  is an explanatory chart of second information according to a modification example C. 
         FIG. 17  is an explanatory chart of the second information according to the modification example C. 
         FIG. 18  is a graph indicating a relation between evaluation points and refrigerant suppliable quantity according to a modification example J. 
         FIG. 19  is a flowchart depicting calculation of refrigerant suppliable quantity according to a modification example M. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     (1) Entire Configuration 
     A refrigerant management system  100  is configured to manage a refrigerant used in a refrigerant use device. The refrigerant use device includes a vapor compression refrigeration cycle that uses a refrigerant. Examples of the refrigerant use device include an air conditioner, an air cleaner, a heat pump hot water supply apparatus, a refrigeration apparatus, and a cold storage apparatus. Examples of the refrigerant used in the refrigerant use device include R32, R452B, R410A, R454B, an HFO mixed refrigerant (e.g. a mixed refrigerant including HFO-1123 and R32), CO2, and CF3I (by itself or a mixed refrigerant thereof). 
     Refrigerant management executed by the refrigerant management system  100  means centrally grasping a refrigerant flowing in a refrigerant circulation cycle or providing each worker with information on the refrigerant thus grasped.  FIG. 1  is a schematic view of the refrigerant circulation cycle. The refrigerant circulation cycle is principally constituted by a manufacture process, a distribution process, an installation process, a maintenance process, a collection process, a regeneration process, and a discard process.  FIG. 1  includes arrows each indicating a flow of the refrigerant. The refrigerant flows in a states of being filled in a dedicated container such as a cylinder, or a refrigerant use device.  FIG. 1  indicates flows of a container R 1  filled with the refrigerant and a refrigerant use device R 2  filled with the refrigerant. 
     In the manufacture process, the refrigerant is newly manufactured by a refrigerant manufacturer. In the distribution process, the newly manufactured refrigerant is filled in a dedicated cylinder or the like to be shipped. Examples of a destination of the refrigerant include a manufacturer of a refrigerant use device (hereinafter, called a “device manufacturer”), an installation worker of a refrigerant use device, and a maintenance worker of a refrigerant use device. The device manufacturer, the installation worker, and the maintenance worker may be identical or different from one another. The device manufacturer fills the refrigerant use device with the refrigerant as necessary upon manufacture or shipment of the refrigerant use device. 
     In the distribution process, a refrigerant distribution worker distributes a newly manufactured refrigerant or a regenerated refrigerant. The distribution worker buys a refrigerant manufactured by the refrigerant manufacturer or the regenerated refrigerant, and sells the refrigerant to at least one of the device manufacturer, the installation worker, and the maintenance worker. The distribution worker may be a refrigerant seller. The distribution worker may be a worker to distribute refrigerant use devices each filled with a refrigerant. 
     In the installation process, the installation worker installs the refrigerant use device at a predetermined installation site. Examples of the predetermined installation site include a property such as a building used or owned by an owner of the refrigerant use device. The installation worker fills the refrigerant use device and a refrigerant pipe with the refrigerant by means of a cylinder or the like filled with the refrigerant as necessary, during installation of the refrigerant use device. 
     In the maintenance process, the maintenance worker maintains and manages the refrigerant use device having been installed. Specifically, the maintenance worker inspects or repairs the refrigerant use device. The maintenance worker replaces the refrigerant filled in the refrigerant use device or refills the refrigerant use device with the refrigerant for replenishment by means of a cylinder or the like filled with the refrigerant as necessary. The refrigerant is replaced, exemplarily after elapse of a predetermined period since installation of the refrigerant use device. The refrigerant is refilled, exemplarily when the refrigerant filled in the refrigerant use device is found to be short in quantity upon inspection. 
     In the collection process, the refrigerant collection worker collects the refrigerant filled in the refrigerant use device or the refrigerant filled in the refrigerant use device and the refrigerant pipe installed in the property. The collection worker collects the refrigerant upon repair, relocation, discard, or the like of the refrigerant use device. Examples of a refrigerant collection method include a collection method of gathering, into the refrigerant use device, the refrigerant filled in the refrigerant pipe, and a collection method of filling a dedicated cylinder or the like with the refrigerant in the refrigerant use device and the refrigerant in the refrigerant pipe. The collection worker collects by extracting the refrigerant from the refrigerant use device also upon replacement of the refrigerant filled in the refrigerant use device. 
     In the regeneration process, a refrigerant regeneration worker regenerates the refrigerant collected by the collection worker. Examples of refrigerant regeneration include removing impurities from the collected refrigerant, and regenerating a refrigerant from the collected refrigerant. The regeneration worker receives, from the collection worker, the cylinder or the like filled with a refrigerant to be regenerated and regenerates a refrigerant. The regenerated refrigerant is filled in a dedicated cylinder or the like. 
     In the discard process, part of the refrigerant collected by the collection worker is discarded by a discard worker. Examples of refrigerant discard include chemically destroying the refrigerant for conversion to a substance less likely to affect human bodies and the environments, and keeping the refrigerant so as not to be used. The discard worker receives, from the collection worker, the refrigerant use device and the cylinder or the like filled with a refrigerant to be discarded and discards the refrigerant. 
     Hereinafter, a “worker” will indicate, unless otherwise specified, the device manufacturer, the refrigerant manufacturer, the installation worker, the maintenance worker, the collection worker, the regeneration worker, or the distribution worker. At least part of these workers may be identical. For example, the device manufacturer, the installation worker, the maintenance worker, and the collection worker may be identical, and the regeneration worker and the distribution worker may be identical. The present embodiment assumes that the installation worker, the maintenance worker, and the collection worker are identical. Each of the workers is assigned with a login ID necessary for access to the refrigerant management system  100 . A plurality of different workers will not be assigned with any identical login ID. Each of the workers logs in with use of the own login ID to access the refrigerant management system  100 . 
       FIG. 2  is a view depicting a network configuration of the refrigerant management system  100 .  FIG. 3  is a schematic view depicting an entire configuration of the refrigerant management system  100 .  FIG. 3  includes arrows indicating flows of data treated by the refrigerant management system  100 . 
     The refrigerant management system  100  principally includes a plurality of input terminals  10   a,    10   b,  . . . , a single management server  20 , a single manager terminal  80 , and a network  90  connecting these elements. Examples of the network  90  include the Internet. 
     Each of the input terminals  10   a,    10   b,  . . . is a client computer used and managed by the worker. Examples of the input terminals  10   a,    10   b,  . . . include a mobile terminal such as a smartphone or a tablet device. In a case where the worker is a group such as a company, each of the input terminals  10 a,  10   b,  . . . is actually operated by an individual belonging to the worker, like a service person of a manufacturer. Hereinafter, the term “worker” also indicates a person actually operating each of the input terminals  10   a,    10   b,  . . . . The workers operates the input terminals  10   a,    10   b,  . . . and input predetermined data to the input terminals  10   a,    10   b,  . . . to work with the refrigerant flowing in the refrigerant circulation cycle. The input terminals  10   a,    10   b,  . . . each have a function of transmitting the data inputted by the workers to the management server  20  via the network  90 . The input terminals  10   a,    10   b,  . . . each have a function of receiving predetermined data from the management server  20  as necessary. In the refrigerant management system  100  depicted in  FIG. 3 , a first worker C 1 , a regeneration worker C 4 , a distribution worker C 5 , a device manufacturer C 6 , a refrigerant manufacturer C 7 , and a discard worker C 9  each have the input terminal  10   a,  the input terminal  10   b,  the input terminal  10   c,  the input terminal  10   d,  the input terminal  10   e,  and the input terminal  10 f. The first worker C 1  according to the present embodiment serves as all of the installation worker, the maintenance worker, and the collection worker. The regeneration worker C 4 , the distribution worker C 5 , the device manufacturer C 6 , the refrigerant manufacturer C 7 , and the discard worker C 9  are different from one another and are each different from the first worker C 1 . 
     The management server  20  is a server computer managed by a manager S of the refrigerant management system  100 . The management server  20  may be a rental server, a virtual server offered through a cloud service, or the like. The management server  20  operates to accumulate and process data received from the input terminals  10   a,    10   b,  . . . , relay from the network  90 , manage the network  90 , and the like. The management server  20  has a function of transmitting and receiving predetermined data to and from the input terminals  10   a,    10   b,  . . . via the network  90 . As depicted in  FIG. 2 , the management server  20  stores manager data  20   a  and user data  20   b.  The manager data  20   a  is data with access authority only for the manager S of the refrigerant management system  100 . The user data  20 b is data with access authority for the workers. The management server  20  stores the user data  20   b  for each of the workers. The worker having logged in the refrigerant management system  100  can access the own user data  20   b  with use of the own one of the input terminals  10   a,    10   b,  . . . . The manager S has access authority to the user data  20   b  of all the workers. 
     The manager terminal  80  is a computer used by the manager S of the refrigerant management system  100 . The manager S accesses the management server  20  with use of the manager terminal  80  to manage the refrigerant flowing in the refrigerant circulation cycle. For example, the manager S acquires predetermined data from the management server  20  with use of the manager terminal  80  and provides the workers with information and services relevant to the refrigerant managed by the refrigerant management system  100 . 
     The workers operate the input terminals  10   a,    10   b,  . . . to directly input predetermined data to the management server  20 . The management server  20  is configured to acquire and store first information in accordance with data inputted to the management server  20  by the workers through operation of the input terminals  10   a,    10   b,  . . . . When any of the workers also serves as the manager S, the corresponding worker has both a login ID for the manager and the login ID for the worker. The management server  20  is configured to acquire and store the first information in accordance with data inputted to the management server  20  by the worker through operation of the manager terminal  80 . The management server  20  is configured to generate and store second information in accordance with the first information thus acquired. The first information and the second information will be described in detail later. 
     (2) Detailed Configurations 
       FIG. 4  is a block diagram of the input terminals  10   a,    10   b,  . . . , the manager terminal  80 , and the management server  20 . 
     (2-1) Input Terminal 
     Each of the input terminals  10   a,    10   b,  . . . principally includes an input unit  11 , a transmission unit  12 , a receiver unit  13 , a display unit  14 , a storage unit  15 , and a control unit  16 . 
     The input unit  11  receives operation of a corresponding one of the input terminals  10   a,    10   b,  . . . by the corresponding worker. The transmission unit  12  transmits data to the management server  20  via the network  90 . The receiver unit  13  receives data from the management server  20  via the network  90 . Examples of the data received by the receiver unit  13  include the first information and the second information stored in the management server  20 . The display unit  14  causes a display of the corresponding one of the input terminals  10   a,    10   b,  . . . to display predetermined data. Examples of the data displayed by the display unit  14  include data inputted to the management server  20  through operation of the input terminal  10  by the worker, and data received from the management server  20 . 
     The storage unit  15  stores data and the like received from the management server  20 . The control unit  16  controls the input unit  11 , the transmission unit  12 , the receiver unit  13 , the display unit  14 , and the storage unit  15 . 
     (2-2) Manager Terminal 
     The manager terminal  80  principally includes an input unit  81 , a transmission unit  82 , a receiver unit  83 , a display unit  84 , a storage unit  85 , and a control unit  86 . 
     The input unit  81  receives operation of the manager terminal  80  by the manager S. The transmission unit  82  transmits data to the management server  20  via the network  90 . The receiver unit  83  receives data from the management server  20  via the network  90 . Examples of the data received by the receiver unit  83  include the first information and the second information stored in the management server  20 . The display unit  84  causes a display of the manager terminal  80  to display predetermined data. Examples of the data displayed by the display unit  84  include data inputted to the management server  20  through operation of the manager terminal  80  by the manager S, and data received from the management server  20 . The storage unit  85  stores data and the like received from the management server  20 . The control unit  86  controls the input unit  81 , the transmission unit  82 , the receiver unit  83 , the display unit  84 , and the storage unit  85 . 
     (2-3) Management Server 
     The management server  20  principally includes a control unit  26 , a storage unit  22 , a transmission unit  24 , and a receiver unit  25 . The control unit  26  is a microcontroller, a CPU, or the like configured to read and execute a program. The control unit  26  principally includes an acquisition unit  21 , a generation unit  23 , and an evaluation unit  27 . The acquisition unit  21 , the generation unit  23 , and the evaluation unit  27  each correspond to a function achieved by the program read and executed by the control unit  26 . 
     The acquisition unit  21  acquires first information in accordance with data inputted to the management server  20  through operation of the input terminals  10   a,    10   b,  . . . or the manager terminal  80  by the workers. The acquisition unit  21  acquires the first information during at least one of installation and maintenance of the refrigerant use device. In other words, the acquisition unit  21  acquires the first information in at least one of the installation process and the maintenance process of the refrigerant circulation cycle depicted in  FIG. 1 . 
     The generation unit  23  generates second information in accordance with the first information acquired by the acquisition unit  21 . 
     The evaluation unit  27  evaluates the worker in accordance with the first information stored in the storage unit  22  according to at least one of the number of refrigerant use devices  30  serving as work targets of the worker and refrigerant quantity used in the refrigerant use devices  30  serving as the work targets of the worker. Specifically, the evaluation unit  27  evaluates the worker in accordance with refrigerant quantity expected to be collected from the refrigerant use devices  30  and refrigerant quantity collected from the refrigerant use devices  30 , which are included in the second information generated from the first information and stored in the storage unit  22 . Evaluation according to the present embodiment means at least one of discrimination among the workers, providing each of the workers with points, determination as to a good or bad mark for each of the workers, determination as to whether or not any service is providable to each of the workers, and determination as to what service is provided to the corresponding worker. 
     The evaluation unit  27  determines the service to be provided to the worker as to the refrigerant used in the refrigerant use device  30  in accordance with a result of evaluation of the worker. For example, the evaluation unit  27  calculates quantity suppliable to the worker, of at least one of the refrigerant collected from the refrigerant use devices  30  and regenerated, and a newly manufactured refrigerant to be used in the refrigerant use devices  30 . In this case, the service provided to the worker relates to refrigerant supply. 
     The storage unit  22  is an auxiliary storage device such as an HDD or an SSD. The storage unit  22  stores the first information acquired by the acquisition unit  21  and the second information generated from the first information. As depicted in  FIG. 4 , the storage unit  22  includes a device information database DB 1 , a refrigerant information database DB 2 , an account information database DB 3 , an account management database DB 4 , an event information database DB 5 , and a refrigerant management information database DB 6 . 
     The transmission unit  24  and the receiver unit  25  are network devices. The transmission unit  24  transmits, to the manager S or the corresponding worker, the first information or the second information generated by the generation unit  23 . Specifically, the transmission unit  24  exemplarily transmits the first information or the second information to the terminal or the like used by the manager S or the corresponding worker. The receiver unit  25  receives data from input terminals  10   a,    10   b,  . . . and the manager terminal  80  via the network  90 . 
     (2-4) Details of Management Server 
     (2-4-1) Database 
     Description is made to the databases included in the storage unit  22  of the management server  20 . 
       FIG. 5  is an explanatory chart of the device information database DB 1 . The device information database DB 1  stores information on the refrigerant use devices  30  registered to the refrigerant management system  100 . The device information database DB 1  has records each including at least a device ID, a model name, a device manufacturer ID, a refrigerant type, refrigerant already filled quantity, and ability information. The device ID may be used as a main key of the device information database DB 1 . 
     The device ID is assigned to the refrigerant use device  30  for registration of the refrigerant use device  30  to the refrigerant management system  100 . The device ID may be a manufacturer&#39;s serial number or the like of the refrigerant use device  30 . The model name has a character string indicating the model of the refrigerant use device  30 . The device manufacturer ID is a worker ID assigned to the device manufacturer C 6  having manufactured the refrigerant use device  30 . The refrigerant type has a character string indicating the type of the refrigerant used in the refrigerant use device  30 . The refrigerant already filled quantity is refrigerant quantity preliminarily filled in the refrigerant use device  30 . The refrigerant quantity is indicated by means of weight of the refrigerant. The refrigerant quantity has a unit of kilogram. The ability information is horsepower of the refrigerant use device  30 . 
     The device information database DB 1  stores device information registered to the management server  20  upon device manufacture or device shipment by the device manufacturer C 6 . Device information not registered in the device information database DB 1  can be registered through access to the management server  20  by the installation worker C 1  or the maintenance worker C 2 . 
     The management server  20  according to the present embodiment holds the device information database DB 1  in the storage unit  22 . The management server  20  may alternatively access a database held by the device manufacturer C 6  via the network to acquire the device information. 
     The refrigerant information database DB 2  stores information on the cylinder used for flowing of the refrigerant registered to the refrigerant management system  100 . The refrigerant information database DB 2  has records each including at least a cylinder ID, a distribution worker ID, a refrigerant type, and refrigerant quantity. 
     The account information database DB 3  stores information on the workers and the manager registered to the refrigerant management system  100 . The account information database DB 3  has records each including at least a worker ID, a worker name, work contents, and the login ID. The worker ID is assigned to the worker for registration of the first worker C 1  or the like to the refrigerant management system  100 . The management server  20  assigns the worker ID to each of the workers so as to avoid duplication between a worker ID to be registered and the worker ID assigned to the already registered worker. The work contents have a character string indicating work contents such as installation, maintenance, or the like. The login ID is used for access to the management server  20  by the worker. The login ID and the worker ID are associated with each other and are stored in the account information database DB 3 . 
     The account management database DB 4  stores authority additional information on each of the workers registered to the refrigerant management system  100 . Specifically, the account management database DB 4  stores, for each of the workers, the work contents, access authority for information stored in the storage unit  22 , and information on work authority with access to the management server  20 .  FIG. 6  is a chart indicating work contents for respective workers.  FIG. 6  indicates work types allowed to each of the workers. Distribution, installation, maintenance, collection, regeneration, and discard in  FIG. 6  indicate work executed by the worker in the distribution process, the installation process, the maintenance process, the collection process, the regeneration process, and the discard process in  FIG. 1 , respectively. 
     For example, the first worker C 1  having a worker ID “CA006” in  FIG. 6  can execute installation, maintenance, and collection. In this case, the management server  20  determines that the first worker C 1  is accessible to the device information database DB 1  or the like registered to the management server  20  in accordance with the work types allowed to the first worker C 1 . In response to a request from the first worker C 1 , the management server  20  reads predetermined data from the device information database DB 1  or the like and transmits the read data to the input terminal  10   a  of the first worker C 1 . 
     For example, the regeneration worker C 4  having a worker ID “GA019” in  FIG. 6  can execute only regeneration. In this case, the management server  20  determines that the regeneration worker C 4  is inaccessible to the device information database DB 1  or the like registered to the management server  20  in accordance with the work type allowed to the regeneration worker C 4 . 
     The event information database DB 5  stores work contents executed by the workers registered to the refrigerant management system  100 . The event information database DB 5  has records each including at least the work contents, a property ID, a device owner ID, the device ID, a device installation site, and refrigerant additionally filled quantity. The property ID is assigned to a property where target work is executed. The device owner ID is assigned to an owner of the refrigerant use device  30 . The device ID is assigned to a device as a work target. The device installation site has a character string indicating an address of the property where target work is executed. The refrigerant additionally filled quantity is refrigerant quantity additionally filled in the device or the refrigerant pipe upon execution of target work. 
     The refrigerant management information database DB 6  stores the first information and the second information. 
     (2-4-2) Method of Acquiring Refrigerant Already Filled Quantity 
     The acquisition unit  21  in the management server  20  acquires refrigerant already filled quantity that is refrigerant quantity filled in the refrigerant use device  30  as a work target of each of the workers upon shipment.  FIG. 7  is a flowchart depicting acquisition of the refrigerant already filled quantity  FIG. 7  includes processing in step S 11  to step S 20 . Acquisition of the refrigerant already filled quantity is executed when each of the workers accesses the management server  20  and registers work contents, and upon generation of the second information by the generation unit  23  in the management server  20 . 
     When each of the workers accesses the management server  20  and starts registration of work contents, a flow depicted in  FIG. 7  starts. In step S 11 , the worker operates a corresponding one of the input terminals  10   a,    10   b,  . . . to input, to the management server  20 , the device ID of the refrigerant use device  30  as a target of acquisition of refrigerant already filled quantity Processing in step S 12  to step S 19  is executed by the acquisition unit  21  in the management server  20 . 
     Step S 12  involves determination of whether or not refrigerant already filled quantity of the refrigerant use device  30  corresponding to the device ID inputted in step S 11  is registered to the device information database DB 1 . When registration is determined in step S 12 , the refrigerant already filled quantity of the refrigerant use device  30  is acquired from the device information database DB 1  in step S 13 . When no registration is determined in step S 12 , determined in step S 14  is whether or not there is inputted input data including ability information on the refrigerant use device  30 , or whether or not the ability information on the refrigerant use device  30  is registered to the device information database DB 1 . 
     When determined in step S 14  that there is inputted the input data including the ability information or that the ability information is registered to the device information database DB 1 , in step S 15 , refrigerant already filled quantity is predicted in accordance with the ability information included in the input data or the ability information being registered, and a predictive value is acquired as the refrigerant already filled quantity For example, the refrigerant already filled quantity is acquired with prediction that the refrigerant already filled quantity is  20  kg when ability is  8  horsepower, the refrigerant already filled quantity is  21  kg when the ability is  10  horsepower, the refrigerant already filled quantity is  23  kg when the ability is  12  horsepower, and the refrigerant already filled quantity is  24  kg when the ability is  14  horsepower. When determined that there is inputted no input data including the ability information and the ability information is not registered to the device information database DB 1  in step S 14 , determined in step S 16  is whether or not there is inputted the refrigerant already filled quantity of the refrigerant use device  30 . When determined that there is inputted in step S 16 , it is determined in step S 17  whether or not an input value of the refrigerant already filled quantity is appropriate. For example, it is determined whether or not the refrigerant already filled quantity is within a predetermined range. The predetermined range may be set from 18 kg to 26 kg with a margin to a predictive value according to the ability information described above. When the input value is determined as being appropriate in step S 17 , the input value is acquired as the refrigerant already filled quantity in step S 18 . 
     When determined that there is not inputted in step S 16  or when the input value is determined as being inappropriate in step S 17 , a default value of the refrigerant already filled quantity is acquired in step S 19 . In step S 20 , the storage unit  22  in the management server  20  stores the refrigerant already filled quantity acquired in step S 13 , step S 15 , step S 18 , and step S 19  as refrigerant already filled quantity of the refrigerant use device  30 . 
     (2-5) First Information and Second Information 
     Description is made to the first information and the second information as data treated by the management server  20 . 
     The workers operate the input terminals  10   a,    10   b,  . . . to access the management server  20 , and input data necessary for predetermined format prepared by the management server  20 . The first information is acquired by the management server  20  in accordance with data inputted by the worker. 
     The second information associates refrigerant used quantity that is refrigerant quantity used in the refrigerant use device  30  with worker information acquired as first information. The “refrigerant used in the refrigerant use device  30 ” indicates the refrigerant filled and used in the refrigerant use device  30 , and the refrigerant filled in the refrigerant pipe connected to the refrigerant use device  30 . The acquisition unit  21  in the management server  20  acquires the refrigerant used quantity by totaling the refrigerant already filled quantity and the refrigerant additionally filled quantity. 
     Described next is the first information acquired by the management server  20  in accordance with data inputted to the management server  20  through operation of the input terminal  10   a,  the input terminal  10   b,  and the input terminal  10   c  by the first worker C 1 , the regeneration worker C 4 , and the distribution worker C 5 , respectively, and the second information generated from the first information. 
     For more comprehensible description, hereinafter as necessary, the first worker C 1  as an installation worker will be called the installation worker C 1 , the first worker C 1  as a maintenance worker will be called the maintenance worker C 1 , and the first worker C 1  as a collection worker will be called the collection worker C 1 . 
     (2-5-1) First Information Acquired by Management Server Upon Input of Installation Worker, and Second Information Generated from First Information 
       FIG. 8  is an explanatory view of second information T 11  and T 12  generated from the first information acquired by the management server  20  upon input of the installation worker C 1 . The installation worker C 1  inputs installation information to the management server  20  upon completion of installation After logging in the management server  20 , the first worker C 1  selects installation as an executed work type, and inputs as the installation worker C 1  to the management server  20 , the device ID, the device owner ID, the property ID, device installation site information, and the refrigerant additionally filled quantity. Such data pieces being inputted are stored in the event information database DB 5  in the storage unit  22 . 
     The first information acquired by the management server  20  upon input of the installation worker C 1  includes at least device specifying information, worker information, and refrigerant additionally filled quantity information. The device specifying information is used for specifying the refrigerant use device  30 , and corresponds to the device ID according to the present embodiment. The worker information relates to the worker executing work relevant to the refrigerant use device  30 , and corresponds to the worker ID described in an executer ID in the present example. The refrigerant additionally filled quantity information relates to the refrigerant additionally filled quantity that is refrigerant quantity additionally filled in the refrigerant use device  30  or the refrigerant pipe connected to the refrigerant use device  30 . 
     The management server  20  acquires the worker ID stored in the account information database DB 3  in accordance with the login ID of the installation worker C 1  when the installation worker C 1  logs in the management server  20 , and stores the worker ID as the executer ID. 
     The management server  20  acquires information on the model name and the device manufacturer from the device information database DB 1  in accordance with the device ID inputted by the installation worker C 1 . The management server  20  further acquires the refrigerant already filled quantity through a process of acquiring the refrigerant already filled quantity in  FIG. 7 . 
     When the management server  20  determines registration of the installation information after the installation worker C 1  inputs the installation information to the management server  20 , the management server  20  acquires a date of registration of the installation information as an execution date. 
     When the property ID is registered to the event information database DB 5 , the management server  20  can acquire the device installation site information from the property ID. In this case, the management server  20  may acquire the device installation site information from the property ID. 
     The generation unit  23  in the management server  20  acquires information on the refrigerant already filled quantity or the like subsequently to the first information acquired upon input of the installation worker C 1 , generates the second information T 11  and T 12  as indicated in  FIG. 8 , and stores the second information thus generated in the refrigerant management information database DB 6 . 
     The second information T 12  indicated in  FIG. 8  associates the refrigerant used quantity and the executer ID included in the second information T 11 .  FIG. 8  further exemplifies, as the second information T 12 , the execution date, the device ID, the refrigerant type, the refrigerant already filled quantity, and the refrigerant additionally filled quantity included in the second information T 11 . 
     (2-5-2) First Information Acquired by Management Server Upon Input of Maintenance Worker, and Second Information Generated from First Information 
       FIG. 9  is an explanatory view of second information T 21  and T 22  generated from the first information acquired by the management server  20  upon input of the maintenance worker C 1 . The maintenance worker C 1  inputs maintenance information to the management server  20  upon completion of maintenance. After logging in, the first worker C 1  selects maintenance as an executed work type, and inputs as the maintenance worker C 1  to the management server  20 , the device ID, the device owner ID, the property ID, and the refrigerant additionally filled quantity. Such data pieces being inputted are stored in the event information database DB 5  in the storage unit  22 . 
     The first information acquired by the management server  20  upon input of the maintenance worker C 1  includes at least the device specifying information, the worker information, and the refrigerant additionally filled quantity information. 
     When the management server  20  determines registration of the maintenance information after the maintenance worker C 1  inputs the maintenance information to the management server  20 , the management server  20  acquires a date of registration of the maintenance information as an execution date. 
     The generation unit  23  in the management server  20  acquires information on the refrigerant already filled quantity or the like acquired from the second information T 11  and T 12  prepared during installation and the maintenance information inputted during maintenance, generates the second information T 21  and T 22  as indicated in  FIG. 9 , and stores the second information thus generated in the refrigerant management database DB 6 . 
     The second information T 22  is automatically generated by the generation unit  23  in the management server  20  in accordance with the second information T 21 . The maintenance worker C 1  can acquire the second information T 22  from the management server  20  with use of the input terminal  10   a.  The second information T 22  includes at least information associating the refrigerant used quantity with the worker. The refrigerant used quantity is refrigerant quantity used in the refrigerant use device  30  during maintenance. The refrigerant used quantity in the second information T 22  corresponds to total refrigerant quantity filled in the refrigerant use device  30  after the maintenance worker C 1  additionally fills the refrigerant use device  30  with the refrigerant. The refrigerant used quantity is thus equal in quantity to the refrigerant used quantity upon completion of installation Additional refrigerant filling during maintenance indicates leakage of the refrigerant in the refrigerant use device from installation to maintenance. Even when the refrigerant is additionally filled during maintenance, the refrigerant used quantity after additional filling is equal to quantity upon completion of installation. 
     The second information T 22  indicated in  FIG. 9  associates the refrigerant used quantity with the executer ID included in the second information T 21 .  FIG. 9  further exemplifies, as the second information T 22 , the execution date, the device ID, the refrigerant type, and the refrigerant already filled quantity included in the second information T 21 .  FIG. 9  exemplifies total refrigerant additionally filled quantity as the second information T 22 . The total refrigerant additionally filled quantity corresponds to refrigerant quantity additionally filled during installation and refrigerant quantity additionally filled during maintenance. The total refrigerant additionally filled quantity is calculated from refrigerant quantity additionally filled during past work, through acquisition, from the event information DB 5 , of past work history on the device ID inputted as the maintenance information. 
     When the installation worker and the maintenance worker are identical as in the present embodiment, the management server  20  may recognize that these workers are identical upon login to the management server  20 , and may cause the maintenance worker to select a maintenance target device or property when the maintenance worker selects maintenance as the executed work type. In this case, the management server  20  can acquire the device ID and the property ID from the event information DB 5 , so that the maintenance worker may have only to input the refrigerant additionally filled quantity The maintenance worker C 1  may register maintenance contents to the management server. The maintenance contents indicate specific contents of maintenance and management of the refrigerant use device  30  executed by the maintenance worker C 1 . Examples of the maintenance contents include work of repairing a site causing refrigerant leakage when the refrigerant is found to leak from the refrigerant use device  30 , work of replenishing the refrigerant when the refrigerant filled in the refrigerant use device  30  is found to be short in quantity, and work of replacing at least part of the refrigerant filled in the refrigerant use device  30 . 
     (2-5-3) First Information Acquired by Management Server Upon Input of Collection Worker 
       FIG. 10  is an explanatory view of first information T 31  acquired by the management server  20  upon input of the collection worker C 1 . The collection worker C 1  inputs refrigerant collection information to the management server  20  upon completion of collection. After logging in, the first worker C 1  selects collection as an executed work type, and inputs as the collection worker C 1  to the management server  20 , the device ID, the device owner ID, the property ID, and the refrigerant collected quantity. Such data pieces being inputted are stored in the event information database DB 5  in the storage unit  22 . The collection worker C 1  receives a collection cylinder  50  from a cylinder manufacturer C 8 . The collection cylinder  50  is a container to be filled with the refrigerant collected from the refrigerant use device  30  by the collection worker C 1 . When the collection worker C 1  receives the collection cylinder  50  from the cylinder manufacturer C 8 , the collection cylinder  50  is not filled with any refrigerant. 
     The first information T 31  acquired by the management server  20  upon input of the collection worker C 1  includes at least the device specifying information, the worker information, and refrigerant collected quantity information. The refrigerant collected quantity information includes refrigerant collected quantity obtained by totaling refrigerant quantity filled in the refrigerant use device  30  to be collected and refrigerant quantity collected from the refrigerant pipe connected to the refrigerant use device  30 . The collected refrigerant is filled in the collection cylinder  50 , and the collection cylinder  50  filled with the refrigerant and the refrigerant use device  30  are delivered to the regeneration worker C 4  or the refrigerant discard worker C 9 . 
     When the management server  20  determines registration of the refrigerant collection information after the collection worker C 1  inputs the collection information to the management server  20 , the management server  20  acquires a date of registration of the refrigerant collection information as an execution date. 
     The management server  20  acquires information on the refrigerant collected quantity or the like from the second information T 11 , T 12 , T 21 , and T 22  prepared during installation or maintenance and the collection information inputted by the collection worker C 1  upon collection, generates the first information T 31  as indicated in  FIG. 10 , and stores the first information in the refrigerant management database DB 6 . 
     When the installation worker, the maintenance worker, and the collection worker are identical as in the present embodiment, the management server  20  may recognize that these workers are identical upon login to the management server  20 , and may cause the collection worker to select a collection target device or property when the collection worker selects collection as the executed work type. In this case, the management server  20  can acquire the device ID and the property ID from the event information DB 5 , so that the collection worker may have only to input the refrigerant collected quantity 
     (2-5-4) First Information Acquired by Management Server Upon Input of Regeneration Worker 
       FIG. 11  is an explanatory view of first information T 41  acquired by the management server  20  upon input of the regeneration worker C 4 . The regeneration worker C 4  inputs regeneration information to the management server  20  upon completion of regeneration. The regeneration worker C 4  receives the refrigerant use device  30  or the collection cylinder  50  from the collection worker C 1 . The regeneration worker C 4  extracts the entire refrigerant collected by the collection worker C 1  from the refrigerant use device  30  or the collection cylinder  50 , regenerates the refrigerant thus extracted, and fills a refrigerant container  60  with the refrigerant thus regenerated. The refrigerant container  60  is a dedicated container to be filled with the regenerated refrigerant. Examples of the refrigerant container  60  include a large cylinder or a tanker. The regeneration worker C 4  delivers the refrigerant container  60  filled with the regenerated refrigerant to the distribution worker C 5 . 
     As indicated in  FIG. 11 , the first information T 41  acquired by the management server  20  upon input of the regeneration worker C 4  includes at least the refrigerant collection information and refrigerant regeneration information. The refrigerant collection information relates to the refrigerant not yet regenerated by the regeneration worker C 4 . The refrigerant regeneration information relates to the refrigerant having been regenerated by the regeneration worker C 4 . 
     The refrigerant collection information includes at least the executer ID as the worker ID of the collection worker C 1 , the refrigerant type, and refrigerant quantity not yet regenerated. The refrigerant type is the type of the refrigerant filled in the collection cylinder  50  or the refrigerant use device  30 . The refrigerant collected quantity is refrigerant quantity collected by the collection worker C 1 . The refrigerant collection information has data for each collection worker C 1  and for each refrigerant type. Refrigerant quantity filled in the refrigerant use device  30  having been collected may not be accurate. The refrigerant quantity not yet regenerated is thus set as refrigerant quantity actually collected from the refrigerant use device  30  by the regeneration worker C 4 . 
     The refrigerant regeneration information includes at least the executer ID as the worker ID of the regeneration worker C 4 , the refrigerant type, the refrigerant regenerated quantity, and an executed date. The refrigerant type indicates the type of the refrigerant regenerated by the regeneration worker C 4 . The refrigerant regenerated quantity corresponds to refrigerant quantity regenerated by the regeneration worker C 4 . The refrigerant regeneration information has data for each refrigerant type. The refrigerant regenerated quantity is less than the refrigerant quantity not yet regenerated. The refrigerant regenerated quantity is exemplarily about 90% of the refrigerant quantity not yet regenerated. 
     When the management server  20  determines registration of the refrigerant regeneration information after the regeneration worker C 4  inputs the refrigerant regeneration information to the management server  20 , the management server  20  acquires a date of registration of the refrigerant regeneration information as an execution date. 
     When the collection worker and the regeneration worker are different from each other as in the present embodiment, the management server  20  may provide the regeneration worker C 4  with the device ID, the cylinder ID, the property ID, or the like as the second information after the regeneration worker C 4  logs in the management server  20 . The management server  20  acquires the second information provided to the regeneration worker C 4  and information on the refrigerant regenerated quantity or the like inputted upon regeneration, and generates the first information T 41  as indicated in  FIG. 11  and stores the first information in the refrigerant management database DB 6 . 
     (2-5-5) First information acquired by management server upon input of distribution worker 
       FIG. 12  is an explanatory view of first information T 51  acquired by the management server  20  upon input of the distribution worker C 5 . The distribution worker C 5  inputs distribution information to the management server  20  upon completion of distribution. The distribution worker C 5  receives the refrigerant container  60  from the refrigerant manufacturer C 7  or the regeneration worker C 4 . The refrigerant container  60  received by the distribution worker C 5  is filled with the refrigerant manufactured by the refrigerant manufacturer C 7  or the refrigerant regenerated by the regeneration worker C 4 . The distribution worker C 5  fills a refrigerant cylinder  40  or a regeneration cylinder  70  with the refrigerant filled in the refrigerant container  60 . The distribution worker C 5  distributes, to the first worker C 1  (the installation worker C 1  or the maintenance worker C 1 ) as necessary, the refrigerant cylinder  40  or the regeneration cylinder  70  filled with the refrigerant. 
     As indicated in  FIG. 12 , the first information T 51  acquired by the management server  20  upon input of the distribution worker C 5  includes at least refrigerant shipment information and refrigerant distribution information. The refrigerant shipment information relates to the refrigerant filled in the refrigerant cylinder  40  or the regeneration cylinder  70  and shipped by the distribution worker C 5 . The refrigerant distribution information relates to the refrigerant distributed to the first worker C 1  by the distribution worker C 5 . 
     The refrigerant shipment information includes at least the executer ID as the worker ID of the distribution worker C 5 , the refrigerant type, and refrigerant shipped quantity The refrigerant type indicates the type of the refrigerant shipped by the distribution worker C 5 . The refrigerant shipped quantity corresponds to refrigerant quantity shipped by the distribution worker C 5 . The refrigerant shipment information has data for each refrigerant type. 
     The refrigerant distribution information includes at least the executer ID as the worker ID of the distribution worker C 5 , a distribution destination ID, the refrigerant type, refrigerant distributed quantity, and an executed date. The distribution destination ID is the worker ID of the first worker C 1  having received a distributed refrigerant. The refrigerant type indicates the type of the refrigerant distributed by the distribution worker C 5 . The refrigerant distributed quantity corresponds to refrigerant quantity distributed by the distribution worker C 5 . The refrigerant distribution information has data for each distribution destination ID and for each refrigerant type. When the management server  20  determines registration of the refrigerant distribution information after the distribution worker C 5  inputs the refrigerant distribution information to the management server  20 , the management server  20  acquires a date of registration of the refrigerant distribution information as an execution date. 
     The management server  20  acquires the information inputted by the distribution worker C 5  and information such as the execution date registered by the management server  20 , and generates the first information T 51  as indicated in  FIG. 12  and stores the first information in the refrigerant management database DB 6 . 
     (2-6) Second Information with Access Authority Only for Manager 
     The management server  20  generates second information T 92  relevant to refrigerant quantity treated by each worker in accordance with the first information and the second information stored in the refrigerant management information database DB 6 . The management server  20  resisters the second information T 92  thus generated to the refrigerant management information database DB 6  in the storage unit  22 . The worker can check the second information T 92  stored in the management server  20  with use of a corresponding one of the input terminals  10   a,    10   b,  . . . . The second information that the worker can check is the second information with access authority to the worker, and examples thereof include the second information T 11 , T 12 , T 21 , T 22 , . . . generated from the first information acquired by the management server  20  in accordance with data inputted to the management server  20  by the worker. The manager S can check all the second information stored in the management server  20  with use of the manager terminal  80 . The management server  20  generates, in addition to the second information indicated in  FIG. 8  and  FIG. 9 , the second information T 92  with access authority only to the manager S in accordance with the first information thus acquired. 
       FIG. 13  is an explanatory chart exemplifying the second information T 92  on refrigerant quantity treated by each worker, with access authority only for the manager S. The second information T 92  indicated in  FIG. 13  associates the information on the worker with the information on the refrigerant used in the refrigerant use device  30  as a work target of the worker in the entire refrigerant management system  100 . 
     The “information on the worker” included in the second information T 92  corresponds to the “worker ID” indicated in  FIG. 13 . The “information on the worker” is the worker ID of the first worker C 1  or the like. Specific examples of the “worker ID” include the executers ID indicated in  FIG. 8  to  FIG. 12 .  FIG. 13  includes “CA006” and “CA015” as the workers ID of the first workers Cl to execute installation, maintenance, and collection. The worker ID “GA019” corresponds to the regeneration worker C 4 . The worker ID “HA019” corresponds to the distribution worker C 5 . 
     The second information T 92  includes, as indicated in  FIG. 13  as the “information on the refrigerant used in the refrigerant use device  30 ”, the refrigerant type, refrigerant held quantity, the refrigerant used quantity, refrigerant to-be-collected quantity, the refrigerant collected quantity, the refrigerant regenerated quantity, refrigerant discarded quantity, refrigerant to-be-distributed quantity, and the refrigerant distributed quantity. The refrigerant type is a name indicating the type of the refrigerant flowing in the refrigerant circulation cycle. The information other than the refrigerant type relates to refrigerant quantity flowing in the refrigerant circulation cycle. 
     The refrigerant held quantity corresponds to total refrigerant quantity held by the worker. 
     The refrigerant used quantity corresponds to total refrigerant quantity used in the refrigerant use devices  30  by the worker, in the refrigerant held quantity The refrigerant used in the refrigerant use device  30  by the worker corresponds to the refrigerant filled in the refrigerant use device  30  and the refrigerant pipe connected to the refrigerant use device  30 . When the worker is the installation worker C 1  or the maintenance worker C 1 , the refrigerant used quantity corresponds to total refrigerant quantity filled in all the refrigerant use devices  30  as work targets and the refrigerant pipes connected to the refrigerant use devices  30 . The refrigerant used quantity has a value obtained by subtracting, from the refrigerant held quantity, refrigerant quantity held in the refrigerant cylinder  40  and the refrigerant quantity held in the regeneration cylinder  70  by the worker. The refrigerant used quantity is calculated in accordance with the “refrigerant used quantity” included in the second information T 11 , T 12 , T 21 , T 22 , . . . or the like indicated in  FIG. 8  and  FIG. 9 . 
     The refrigerant to-be-collected quantity corresponds to total refrigerant quantity expected to be collected from the refrigerant use devices  30  within a predetermined period by the collection worker C 1 , in the refrigerant used quantity of the installation worker C 1  or the maintenance worker C 1 . The acquisition unit  21  acquires the refrigerant to-be-collected quantity in accordance with the first information. The refrigerant to-be-collected quantity is exemplified by total refrigerant quantity filled in the refrigerant use device  30  after elapse of the predetermined period since installation or start of use. The predetermined period is set in accordance with the type of the refrigerant being used, the model of the refrigerant use device  30 , and the like. For example, the refrigerant filled in the refrigerant use device  30  after elapse of 15 years since an installation execution date and the refrigerant pipe connected to the refrigerant use device  30  is treated as a refrigerant to be collected. 
     Specifically, the acquisition unit  21  acquires the refrigerant to-be-collected quantity in accordance with third information included in the first information. The third information relates to an execution date. The execution date corresponds to a work day or a work month. The work day corresponds to a day of registration of at least one of the installation information and the maintenance information. The work month corresponds to a month of registration of at least one of the installation information and the maintenance information. 
     The refrigerant collected quantity corresponds to total refrigerant quantity collected from the refrigerant use device  30  by the collection worker C 1 . The refrigerant collected quantity is calculated in accordance with the “refrigerant quantity not yet regenerated” included in the first information T 41  indicated in  FIG. 11  and the refrigerant collected quantity included in the first information T 31  indicated in  FIG. 10 . 
     According to the present embodiment, the installation worker C 1 , the maintenance worker C 1 , and the collection worker C 1  are the identical worker C 1 . When the worker is the first worker C 1 , the second information T 92  includes, as information on refrigerant quantity, the refrigerant collected quantity in addition to the refrigerant used quantity and the refrigerant to-be-collected quantity 
     The refrigerant regenerated quantity corresponds to total refrigerant quantity regenerated by the regeneration worker C 4 . The refrigerant regenerated quantity is calculated in accordance with the “refrigerant regenerated quantity” included in the first information T 41  indicated in  FIG. 11  or the like. 
     The refrigerant discarded quantity corresponds to total refrigerant quantity not regenerated but discarded by the regeneration worker C 4 . 
     The refrigerant to-be-distributed quantity corresponds to total refrigerant quantity to be distributed by the distribution worker C 5 . In an exemplary case where the installation worker C 1  and the maintenance worker C 1  issues application relevant to refrigerant distribution to the distribution worker C 5 , the refrigerant to-be-distributed quantity is calculated in accordance with contents of the application. Examples of the application contents include refrigerant quantity distributed in the past, a recent refrigerant distribution date, and a reason for application for refrigerant distribution. 
     The refrigerant distributed quantity corresponds to total refrigerant quantity distributed by the distribution worker C 5  to the installation worker C 1  or the maintenance worker C 1  . The refrigerant distributed quantity is calculated in accordance with the “refrigerant distributed quantity” included in the first information T 51  indicated in  FIG. 12  or the like. 
     The refrigerant quantity included in the second information T 92  may correspond to quantity for each of the refrigerant use devices  30 . In this case, the second information T 92  may associate the device ID of the refrigerant use device  30  with the refrigerant used quantity used in the refrigerant use device  30 . 
     As described above, the second information T 92  corresponds to information associating the information on the worker to execute work relevant to the refrigerant use device  30  with the refrigerant quantity used in the refrigerant use device  30  as a work target of the worker, and corresponds to information associating the information on the refrigerant use device  30  with the refrigerant quantity used in the refrigerant use device  30 . 
     (2-7) Evaluation of Worker 
     The evaluation unit  27  evaluates the worker in accordance with the first information including the device specifying information and the worker information, according to at least one of the number of the refrigerant use devices  30  serving as work targets of the worker and the refrigerant used quantity that is refrigerant quantity used in the refrigerant use devices  30  serving as the work targets of the worker. The evaluation unit  27  generates the second information associating the refrigerant used quantity and the worker from the first information, and evaluates the worker in accordance with the second information. 
     Specifically, the evaluation unit  27  evaluates the worker in accordance with the refrigerant quantity expected to be collected from the refrigerant use devices  30  and the refrigerant quantity collected from the refrigerant use devices  30 , which are included in the second information T 92  indicated in  FIG. 13 . The refrigerant quantity expected to be collected from the refrigerant use devices  30  is refrigerant quantity currently held by the worker and estimated to be collected, and corresponds to the “refrigerant to-be-collected quantity” indicated in  FIG. 13 . The refrigerant quantity collected from the refrigerant use devices  30  is refrigerant quantity actually collected from the worker, and corresponds to the “refrigerant collected quantity” indicated in  FIG. 13 . The evaluation unit  27  evaluates the worker in accordance with the refrigerant to-be-collected quantity, the refrigerant collected quantity, and the refrigerant distributed quantity included in the second information T 92  or the like. 
     (2-8) Service Offered to Worker 
     The evaluation unit  27  further determines the service to be provided to the worker as to the refrigerant used in the refrigerant use device  30  in accordance with the second information T 92  indicated in  FIG. 13 . The service determined by the evaluation unit  27  is exemplified by supplying the worker with the refrigerant. 
     Specifically, the evaluation unit  27  calculates refrigerant suppliable quantity for each of the workers, from the second information T 92 . The refrigerant suppliable quantity corresponds to refrigerant quantity suppliable to the worker. The refrigerant as a supply target is at least one of the refrigerant collected from the refrigerant use device  30  and regenerated, and a newly manufactured refrigerant. In an exemplary case where the evaluation unit  27  evaluates the workers by assigning priority orders to the workers, the evaluation unit  27  calculates the refrigerant suppliable quantity for each of the workers such that the refrigerant suppliable quantity is larger as the priority order is higher. Examples of the worker supplied with the refrigerant include the installation worker C 1  and the maintenance worker C 1 . 
     The evaluation unit  27  calculates the refrigerant suppliable quantity in accordance with the refrigerant to-be-collected quantity, the refrigerant collected quantity, or the like. Specifically, the evaluation unit  27  calculates the refrigerant suppliable quantity for each of the workers in accordance with total quantity of the refrigerant to-be-collected quantity and the refrigerant collected quantity included in the second information T 92 , and the refrigerant distributed quantity included in the second information T 92 . The refrigerant distributed quantity corresponds to refrigerant quantity supplied to the worker. 
     The evaluation unit  27  subsequently provides the distribution worker C 5  or the like with information on the refrigerant suppliable quantity calculated for each of the workers. The distribution worker C 5  calculates refrigerant quantity to be distributed to each of the workers in accordance with the information on the refrigerant suppliable quantity calculated by the evaluation unit  27  in the management server  20 , and supplies the worker with the refrigerant. 
     (3) Effects 
     (3-1) 
     In the refrigerant management system  100 , the management server  20  can centrally grasp the refrigerant flowing in the refrigerant circulation cycle and can provide each of the workers with refrigerant information. Specifically, the management server  20  can generate the second information associating the refrigerant quantity used in the refrigerant use device  30  and the worker information from the first information acquired from the information inputted by each of the workers, and can provide the worker with the second information. The refrigerant management system  100  including the management server  20  can thus manage the refrigerant quantity flowing in the market in each process of the refrigerant circulation cycle. 
     Particularly in the refrigerant management system  100 , the management server  20  can acquire the first information in the installation process by the installation worker C 1  and in the maintenance process by the maintenance worker C 1 . The installation process and the maintenance process precede the collection process in which the collection worker C 1  collects the refrigerant. In other words, the management server  20  can acquire the information on the refrigerant having been collected as well as the refrigerant not yet collected. The refrigerant management system  100  can thus manage even the refrigerant not yet collected by the collection worker C 1 , such as refrigerant quantity filled and used in the refrigerant use device  30 . The manager S of the refrigerant management system  100  thus easily predicts future refrigerant collected quantity for a long-term planning of refrigerant management relevant to refrigerant manufacture, distribution, and the like. Furthermore, the manager S can smoothly manage the refrigerant quantity to be supplied to the installation worker C 1  and the maintenance worker C 1  within a refrigerant quantity range manufacturable by the refrigerant manufacturer C 7  or the like, in accordance with the long-term planning of the refrigerant management. 
     (3-2) 
     The refrigerant management system  100  is configured to evaluate the workers using the refrigerant. In the refrigerant management system  100 , the management server  20  can generate the second information associating the refrigerant quantity used in the refrigerant use device  30  and the worker information from the first information acquired from the information inputted by each of the workers, and can evaluate the worker in accordance with the second information. The refrigerant management system  100  including the management server  20  can thus appropriately supply the worker with the refrigerant to be used in the refrigerant use device  30  in accordance with the result of worker evaluation. 
     (4) Characteristics 
     (4-1) 
     There has been conventionally known a system configured to grasp or manage quantity of a refrigerant used in a refrigerant use device in accordance with information on the refrigerant having been delivered or to be delivered to a collection worker. However, such a system has difficulty in grasping or managing refrigerant quantity flowing in the market in each process of the refrigerant circulation cycle depicted in  FIG. 1 , and particularly has difficulty in grasping or managing refrigerant quantity not yet delivered to the collection worker. 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  in the management server  20  acquires the first information during at least one of installation and maintenance of the refrigerant use device  30 . The first information includes at least the device specifying information, the worker information, and the refrigerant additionally filled quantity information. The acquisition unit  21  acquires the refrigerant already filled quantity in accordance with the device specifying information in the first information, and acquires the refrigerant used quantity by totaling the refrigerant already filled quantity and the refrigerant additionally filled quantity included in the refrigerant additionally filled quantity information in the first information. The generation unit  23  in the management server  20  generates the second information associating the refrigerant used quantity and the worker from the refrigerant used quantity and the worker information in the first information. 
     The acquisition unit  21  can thus acquire the first information necessary for generation of the second information before collection of the refrigerant used in the refrigerant use device  30 , in other words, in the installation process or the maintenance process in the refrigerant circulation cycle depicted in  FIG. 1 . The refrigerant management system  100  can thus acquire the information on the refrigerant not yet collected by the collection worker, and can manage the refrigerant quantity filled and used in each of the refrigerant use devices  30  in association with the worker. 
     The acquisition unit  21  can further gather the first information on the refrigerant flowing in the refrigerant circulation cycle in each of the processes of the refrigerant circulation cycle. The processes of the refrigerant circulation cycle include the manufacture process, the distribution process, the installation process, the maintenance process, the collection process, the regeneration process, and the discard process as depicted in  FIG. 1 . The generation unit  23  can generate the second information from the first information collected in each of the processes of the refrigerant circulation cycle. 
     The refrigerant management system  100  can thus manage the refrigerant quantity flowing in the market by generating the second information from the first information collected from the worker treating the refrigerant used in the refrigerant use device  30 . The manager S of the refrigerant management system  100  can thus grasp the information on the refrigerant quantity flowing in the market with reference to the second information stored in the management server with use of the manager terminal  80 , to acquire an appropriate production volume of refrigerant. 
     (4-2) 
     In the refrigerant management system  100  according to the present embodiment, the storage unit  22  in the management server  20  stores the refrigerant already filled quantity in association with the device specifying information, so that the acquisition unit  21  can acquire the refrigerant already filled quantity being stored in accordance with the device specifying information in the first information thus acquired. The refrigerant management system  100  can thus acquire the refrigerant used quantity in accordance with only the first information. 
     (4-3) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  can acquire the ability information on the ability of the refrigerant use device  30  in accordance with the device specifying information in the first information thus acquired, and can acquire the refrigerant already filled quantity in accordance with the ability information thus acquired. The refrigerant management system  100  can thus acquire the predictive value of the refrigerant already filled quantity in accordance with the ability information preliminarily registered to the management server  20 , even when the refrigerant already filled quantity of the refrigerant use device  30  is not registered to the management server  20 . 
     (4-4) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  can acquire the input data including the ability information on the ability of the refrigerant use device  30 , and can acquire the refrigerant already filled quantity in accordance with the ability information included in the input data. The refrigerant management system  100  can thus acquire the predictive value of the refrigerant already filled quantity in accordance with the ability information inputted to the management server  20  by the worker, even when the refrigerant already filled quantity of the refrigerant use device  30  is not registered to the management server  20 . 
     (4-5) 
     As depicted in step S 12  to step S 15  in  FIG. 7 , the acquisition unit  21  in the refrigerant management system  100  according to the present embodiment can acquire the refrigerant already filled quantity in accordance with the device specifying information or the ability information. Specifically, the acquisition unit  21  acquires the refrigerant already filled quantity in accordance with the device specifying information in the first information thus acquired when the refrigerant already filled quantity is stored in association with the device specifying information, and acquires the predictive value of the refrigerant already filled quantity in accordance with the ability information acquired in accordance with the device specifying information in the first information thus acquired when the refrigerant already filled quantity is not stored in association with the device specifying information. The refrigerant management system  100  can thus acquire an appropriate value adopted as the refrigerant already filled quantity in accordance with the information registered to the management server  20 . 
     (4-6) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  can acquire the total quantity of the refrigerant used quantity of the plurality of refrigerant use devices  30  serving as work targets of the worker, and the generation unit  23  can further generate, as the second information, the information associating the total quantity of the refrigerant used quantity and the worker. The refrigerant management system  100  can thus manage, in association with each of the workers, the refrigerant quantity filled and used in all the refrigerant use devices  30  serving as work targets of the worker. 
     (4-7) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  can acquire the refrigerant to-be-collected quantity that is refrigerant quantity to be collected from the refrigerant use devices  30  within the predetermined period, and the generation unit  23  can further generate, as the second information, the information associating the refrigerant to-be-collected quantity and the worker. The refrigerant management system  100  can thus manage the refrigerant quantity expected to be collected from the refrigerant use devices  30  serving as work targets of the installation worker and the maintenance worker. 
     (4-8) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  acquires the refrigerant to-be-collected quantity in accordance with the third information including the work day or the work month of registration of at least one of the installation information and the maintenance information. For example, the acquisition unit  21  acquires the refrigerant to-be-collected quantity in accordance with the refrigerant quantity used in the refrigerant use device  30  after elapse of the predetermined period since the work day or the work month included in the third information. The refrigerant management system  100  can thus apply the refrigerant to-be-collected quantity as an appropriate predictive value of the refrigerant quantity to be collected from the refrigerant use device  30  within the predetermined period. 
     (4-9) 
     The acquisition unit  21  in the refrigerant management system  100  acquires the first information in accordance with the data inputted by the worker to execute work relevant to the refrigerant use device  30 . Specific examples of the worker include the first worker C 1 , the regeneration worker C 4 , and the distribution worker C 5  as depicted in  FIG. 1 . These workers own the input terminals  10   a,    10   b,  . . . for input of predetermined data to the management server  20 . The workers can thus each input the predetermined data to the management server  20  with use of a corresponding one of the input terminals  10   a,    10   b,  . . . during execution of or immediately after completion of work at a site of work execution relevant to the refrigerant used in the refrigerant use device  30 . 
     (4-10) 
     In the refrigerant management system  100 , the workers do not need to input all the information on work to the management server  20  to allow the acquisition unit  21  to acquire the first information. 
     This configuration reduces time necessary for operation of the input terminals  10   a,    10   b,  . . . and inhibits erroneous input. 
     (4-11) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  in the management server  20  acquires the first information during at least one of installation and maintenance of the refrigerant use device  30 . The first information includes at least the device specifying information and the worker information. The evaluation unit  27  in the management server  20  evaluates the worker in accordance with the first information according to at least one of the number of refrigerant use devices  30  serving as work targets of the worker and the refrigerant used quantity that is refrigerant quantity used in the refrigerant use devices  30  serving as the work targets of the worker. The refrigerant management system  100  can thus appropriately supply the worker with the refrigerant to be used in the refrigerant use device  30  in accordance with the result of worker evaluation. 
     (4-12) 
     In the refrigerant management system  100  according to the present embodiment, the generation unit  23  in the management server  20  generates the second information associating the refrigerant used quantity and the worker from the first information, and the evaluation unit  27  evaluates the worker in accordance with the second information. The refrigerant management system  100  can thus appropriately calculate the refrigerant quantity suppliable to each of the workers in accordance with the refrigerant used quantity of the refrigerant use device  30  serving as a work target of the worker. 
     (4-13) 
     In the refrigerant management system  100  according to the present embodiment, the generation unit  23  generates, as the second information, information associating the refrigerant to-be-collected quantity calculated from the refrigerant used quantity and the worker, and the evaluation unit  27  evaluates the worker in accordance with refrigerant to-be-collected quantity in the second information. The refrigerant management system  100  can thus appropriately calculate the refrigerant quantity suppliable to each of the workers in accordance with the refrigerant quantity expected to be collected from the refrigerant use devices  30  serving as work targets of the installation worker and the maintenance worker. 
     (4-14) 
     In the refrigerant management system  100  according to the present embodiment, the acquisition unit  21  acquires the refrigerant collected quantity that is refrigerant quantity collected from the refrigerant use device  30 , and the evaluation unit  27  evaluates the worker in accordance with the refrigerant collected quantity and the refrigerant to-be-collected quantity The evaluation unit  27  calculates the refrigerant quantity suppliable to each of the workers. 
     In this case, as indicated in  FIG. 13  or the like, the second information includes the refrigerant quantity expected to be collected from the refrigerant use device  30  (the refrigerant to-be-collected quantity) and the refrigerant quantity collected from the refrigerant use device  30  (the refrigerant collected quantity) The evaluation unit  27  can thus execute, in accordance with the second information or the like, evaluation as a reference for appropriate calculation of the refrigerant quantity suppliable to each of the workers within the range of the refrigerant quantity suppliable from the refrigerant management system  100 . The refrigerant management system  100  can appropriately supply the refrigerant to the worker needing the refrigerant. 
     (4-15) 
     In the refrigerant management system  100 , the evaluation unit  27  can assign the priority order to each of the workers in accordance with the second information T 92  indicated in  FIG. 13 , and can calculate the refrigerant suppliable quantity for the worker in accordance with the priority order. 
     The refrigerant management system  100  can thus preferentially supply the worker involved in refrigerant collection with the regenerated refrigerant. In other words, the worker can be more preferentially supplied with the refrigerant as the refrigerant collected quantity is larger or the refrigerant quantity expected to be collected later is larger. The worker can thus be preferentially supplied with the refrigerant by being actively involved in refrigerant collection. In this case, the worker can be preferentially supplied with the refrigerant even before collection of the refrigerant from the refrigerant use device  30  used for own work. 
     The refrigerant management system  100  can urge the workers to be actively involved in refrigerant collection, and thus increase in refrigerant collected quantity and refrigerant regenerated quantity flowing in the market. The refrigerant management system  100  can accordingly suppress refrigerant quantity needed to be newly manufactured in the market. 
     (4-16) 
     In the market where total flowable refrigerant quantity is limited or gradually reduced in consideration of environment protection, increased demand for the refrigerant may lead to difficulty in refrigerant acquisition or increase in refrigerant price. In such a case, the worker to execute work relevant to the refrigerant use devices or the like will have an economic problem caused by increase in refrigerant price and a business problem with no prospect of stable refrigerant acquisition. 
     In the refrigerant management system  100 , the evaluation unit  27  calculates the refrigerant suppliable quantity to enable supply and new manufacture of an appropriate quantity of refrigerant to the workers, or the like. The worker to execute work relevant to the refrigerant use devices can thus efficiently avoid the economic problem caused by increase in refrigerant price and the business problem with no prospect of stable refrigerant acquisition. 
     (5) Modification Examples 
     (5-1) Modification Example A 
     In the regeneration process depicted in  FIG. 1 , the refrigerant regeneration worker regenerates the refrigerant collected by the collection worker. When the collected refrigerant cannot be regenerated, the collection worker or the regeneration worker may discard at least part of the collected refrigerant. Such at least part of the collected refrigerant may alternatively be discarded by a dedicated worker other than the collection worker or the regeneration worker. Examples of such a case where the collected refrigerant cannot be regenerated include a case where the refrigerant cannot be regenerated physically or chemically due to pollution, deterioration, or the like, and a case where refrigerant regeneration needs high cost and refrigerant regeneration is not practical for reuse. 
     In this case, the discard worker C 9  to execute work of discarding the refrigerant may input predetermined information to the management server  20 . Examples of the predetermined information include the device ID of the refrigerant use device  30  as a work target.  FIG. 14  is an explanatory view of first information T 61  acquired by the acquisition unit  21  upon input of the discard worker C 9 . The discard worker C 9  is assumed to be different from the collection worker C 1  and the regeneration worker C 4 . 
     The discard worker C 9  receives the collection cylinder  50  from the collection worker C 1  or the like. The collection cylinder  50  received from the collection worker C 1  is filled with the refrigerant unable to be regenerated and thus to be discarded. In this case, the collection worker C 1  preliminarily sorts collection cylinders  50  filled with the refrigerant collected from the refrigerant use devices  30  into the collection cylinder  50  to be delivered to the regeneration worker C 4  and the collection cylinder  50  to be delivered to the discard worker C 9 . 
     As indicated in  FIG. 14 , the first information T 61  acquired by the acquisition unit  21  upon input of the discard worker C 9  includes at least the refrigerant collection information and refrigerant discard information. The refrigerant collection information relates to the refrigerant not yet discarded by the discard worker C 9 . The refrigerant discard information relates to the refrigerant having been discarded by the discard worker C 9 . 
     The refrigerant collection information includes at least the executer ID as the worker ID of the collection worker C 1 , the refrigerant type, and the refrigerant collected quantity. The refrigerant type indicates the type of the refrigerant collected by the collection worker C 1 . The refrigerant collected quantity is refrigerant quantity collected by the collection worker C 1 . The refrigerant collection information has data for each collection worker C 1  and for each refrigerant type. 
     The refrigerant discard information includes at least the executer ID as the worker ID of the discard worker C 9 , the refrigerant type, the refrigerant discarded quantity, and an executed date. 
     (5-2) Modification example B 
     The embodiment assumes that the installation worker, the maintenance worker, and the collection worker are the identical first worker C 1 . The installation worker, the maintenance worker, and the collection worker may alternatively be workers different from one another. In this case, each of the workers may be made to input all the information on the work, or input may be simplified by provision of information already registered to the databases in the management server  20  to the workers as in the above example. 
       FIG. 15  is an explanatory chart of second information according to the present modification example with access authority only for the manager S.  FIG. 15  includes “CA006” as the worker ID of the installation worker, “DA009” as the worker ID of the maintenance worker, “FA012” as the worker ID of the collection worker, “GA019” as the worker ID of the regeneration worker, and “HA019” as the worker ID of the distribution worker. 
     Neither the installation worker nor the maintenance worker according to the present modification example executes work of collecting the refrigerant from the refrigerant use devices  30 . As indicated in  FIG. 15 , the information on the installation worker or the maintenance worker thus includes the refrigerant used quantity and the refrigerant to-be-collected quantity, but does not include the refrigerant collected quantity The information on the collection worker includes only the refrigerant collected quantity 
     Any of the device manufacturer, the refrigerant manufacturer, the distribution worker, the installation worker, the maintenance worker, the collection worker, the regeneration worker, and the discard worker may be identical, or may be different from one another. For example, the device manufacturer, the refrigerant manufacturer, the distribution worker, and the installation worker may be identical, or the installation worker, the collection worker, the regeneration worker, and the discard worker may be identical. In other words, there is no limitation as to which workers are identical. 
     (5-3) Modification Example C 
     In the refrigerant management system  100 , as indicated in  FIG. 13 , the second information generated by the generation unit  23  with access authority only for the manager S associates the information on the worker to execute work relevant to the refrigerant use devices  30  and the refrigerant used in the refrigerant use devices  30  as work targets of the worker. 
     Alternatively, the second information with access authority only for the manager S may associate the information on the refrigerant use devices  30  and the refrigerant used in the refrigerant use devices  30 . In this case, as indicated in  FIG. 16 , the second information with access authority only for the manager S may associate, as exemplary information on the refrigerant use device  30 , the property ID of the property provided with the refrigerant use device  30  and the information on the refrigerant quantity in the refrigerant use device  30  installed in the property.  FIG. 16  exemplifies the refrigerant type and the refrigerant quantity as the information on the refrigerant quantity in the refrigerant use device  30 . The refrigerant quantity exemplarily indicates refrigerant quantity filled in the refrigerant use device  30  installed in the corresponding property and the refrigerant pipe connected to the refrigerant use device  30 . 
     As indicated in  FIG. 17 , the second information with access authority only for the manager S may associate, as exemplary information on the refrigerant use device  30 , the device owner ID of the owner of the refrigerant use device  30  and the information on the refrigerant quantity in the refrigerant use device  30  held by the owner.  FIG. 17  exemplifies the refrigerant type and the refrigerant quantity as the information on the refrigerant quantity in the refrigerant use device  30 . 
     The information on the refrigerant use device  30  is not limited to the above, but may exemplarily include at least one of the device ID, the device manufacturer ID, the device owner ID, and the device installation site information. 
     The second information with access authority only for the manager S may include both the information associating the information on the worker to execute work relevant to the refrigerant use device  30  with the refrigerant used in the refrigerant use device  30  as a work target of the worker, and the information associating the information on the refrigerant use device  30  with the refrigerant used in the refrigerant use device  30 . 
     (5-4) Modification Example D 
     The management server  20  in the refrigerant management system  100  is managed by the manager S of the refrigerant management system  100 . The manager S may be identical with any one of the workers operating the input terminals  10   a,    10   b,  . . . . The manager S according to the embodiment may belong to the first worker C 1 . 
     (5-5) Modification Example E 
     The acquisition unit  21  in the management server  20  according to the embodiment can acquire the refrigerant already filled quantity of the refrigerant use device  30  with access to the device information database DB 1  using the device ID of the refrigerant use device  30 , and acquires the refrigerant already filled quantity of the refrigerant use device  30  with prediction from the ability information when the refrigerant already filled quantity is not registered to the device information database DB 1 . 
     According to the present modification example, when the refrigerant already filled quantity of the refrigerant use device  30  is inputted in step S 16 , the worker may operate a corresponding one of the input terminals  10   a,    10   b,  . . . to directly input the refrigerant already filled quantity to the management server  20 . Alternatively, the worker may operate the input terminals  10   a,    10   b,  . . . to select appropriate refrigerant already filled quantity from a plurality of choices on the refrigerant already filled quantity 
     The acquisition unit  21  may still alternatively estimate ability of the refrigerant use device  30  from the model name or the device ID of the refrigerant use device  30  and may acquire the refrigerant already filled quantity from the ability thus estimated. The acquisition unit  21  may still alternatively urge the worker to input the ability information on the refrigerant use device  30  and may acquire the refrigerant already filled quantity from the ability information thus inputted. 
     (5-6) Modification Example F 
     According to the embodiment, the worker having logged in the management server  20  directly inputs the information on work to the management server  20 . Alternatively the information inputted to the own terminal or the like by the worker may be transmitted to the management server  20  so as to be inputted to the management server  20 . 
     (5-7) Modification Example G 
     According to the embodiment, the installation worker inputs the installation information, and the maintenance worker and the collection worker subsequently input the maintenance information and the collection information, respectively. Alternatively, the maintenance worker may register, to the management server  20 , the maintenance information on the refrigerant use device or the property provided with no installation information. 
     (5-8) Modification Eexample H 
     In the refrigerant management system  100 , the evaluation unit  27  evaluates the worker in accordance with the second information T 92  indicated in  FIG. 13 . The second information T 92  includes the refrigerant quantity expected to be collected from the refrigerant use device  30  and the refrigerant quantity collected from the refrigerant use device  30 . The second information T 92  may include, in place of the refrigerant quantity expected to be collected from the refrigerant use device  30 , information on use start timing of the refrigerant use device  30  as a work target of the worker. In this case, the evaluation unit  27  may acquire the refrigerant quantity expected to be collected from the refrigerant use device  30  in accordance with the information on the use start timing of the refrigerant use device  30 . Examples of the information on the use start timing include refrigerant quantity filled in the refrigerant use device  30  and the refrigerant pipe connected to the refrigerant use device  30  upon use start of the refrigerant use device  30 . 
     The second information T 92  indicated in  FIG. 13  may further include different information used for worker evaluation. For example, the second information T 92  may further include, as parameters for worker evaluation, information on the refrigerant supplied quantity, the refrigerant regenerated quantity, the number of owned devices, or the like. The refrigerant supplied quantity corresponds to refrigerant quantity supplied to each of the workers from the distribution worker C 5 . The refrigerant regenerated quantity corresponds to refrigerant quantity collected from the refrigerant use device  30  as a work target of the worker and regenerated. The number of owned devices corresponds to the number of the refrigerant use devices  30  serving as work targets of the worker. 
     The evaluation unit  27  according to the present modification example may evaluate the worker in accordance with the refrigerant collected quantity, the refrigerant supplied quantity, and the refrigerant to-be-collected quantity included in the second information T 92  or the like, and may calculate refrigerant quantity suppliable to the worker. In this case, the evaluation unit  27  can reduce refrigerant quantity newly supplied to the worker having large refrigerant supplied quantity, in other words, the worker having been supplied with large refrigerant quantity from the distribution worker C 5 . 
     The evaluation unit  27  according to the present modification example may evaluate the worker in accordance with the refrigerant regenerated quantity and the refrigerant used quantity included in the second information T 92  or the like, and may calculate refrigerant quantity suppliable to the worker. In this case, the evaluation unit  27  can increase refrigerant quantity newly supplied to the worker having large refrigerant regenerated quantity, in other words, the worker having collected and regenerated large refrigerant quantity. 
     (5-9) Modification Example I 
     In the refrigerant management system  100 , the evaluation unit  27  evaluates the worker in accordance with the second information T 92  indicated in  FIG. 13 . The second information T 92  includes the refrigerant quantity expected to be collected from the refrigerant use device  30  (the refrigerant to-be-collected quantity), the refrigerant quantity collected from the refrigerant use device  30  (the refrigerant collected quantity), and the like. The evaluation unit  27  assigns the priority order to the worker in accordance with the second information T 92  or the like, and evaluates the worker in accordance with the priority order. In this case, the priority order may be assigned in accordance with information other than the second information T 92 . 
     The worker operates a corresponding one of the input terminals  10   a,    10   b,  . . . to input, to the management server  20 , information on the refrigerant use device  30  used for own work. The evaluation unit  27  may raise the priority order of the worker having inputted the information on the refrigerant use device  30 . The refrigerant quantity expected to be collected from the refrigerant use device  30  used for work by the worker increases when the worker newly registers the refrigerant use device  30  to the management server  20 . The evaluation unit  27  can thus assign a higher priority order to the worker with larger refrigerant quantity (the refrigerant to-be-collected quantity) expected to be collected from the refrigerant use device  30 , and can stimulate the worker to register, to the management server  20 , the information on the refrigerant use device  30  used for work or the like. 
     The evaluation unit  27  may lower the priority order of the worker as necessary. For example, after supply of the refrigerant to the worker from the distribution worker C 5 , the evaluation unit  27  may lower the priority order of the worker having supplied with the refrigerant in accordance with the refrigerant supplied quantity. This inhibits a problem that the worker with a low priority order is continuously less likely to be supplied with the refrigerant and the refrigerant is not appropriately distributed to a plurality of workers or the like. 
     (5-10) Modification Example J 
     In the refrigerant management system  100 , the evaluation unit  27  assigns the priority order to each of the workers in accordance with the second information T 92  indicated in  FIG. 13  or the like, and calculates the refrigerant suppliable quantity for the worker in accordance with the priority order. 
     The evaluation unit  27  may alternatively rank the worker to be evaluated in accordance with the second information T 92 , instead of assigning the priority order to the worker, and may calculate the refrigerant suppliable quantity for the worker in accordance with such a rank. The evaluation unit  27  may still alternatively provide the worker to be evaluated with points in accordance with the second information T 92 , instead of assigning the priority order to the worker, and may calculate the refrigerant suppliable quantity for the worker in accordance with the points. 
     Described next as a specific example is the points (hereinafter, called “evaluation points”) provided to the worker in accordance with the second information T 92  for evaluation of the worker by the evaluation unit  27 . 
     The evaluation points are provided to the worker having been involved in refrigerant collection and the worker expected to be involved in refrigerant collection. In other words, the worker is provided with higher evaluation points as the worker is more actively involved in refrigerant collection. As the worker is provided with higher evaluation points, the worker is more preferentially supplied with the refrigerant. 
     The evaluation points provided to the worker is determined in accordance with the refrigerant collected quantity, the refrigerant to-be-collected quantity, and the like of the worker. The refrigerant collected quantity is adopted in the case where the worker is the collection worker C 1 . The refrigerant collected quantity specifically indicates total refrigerant quantity collected from the refrigerant use device  30  as an own work target by the collection worker C 1 . Larger refrigerant collected quantity of the collection worker C 1  indicates more active involvement in refrigerant collection by the worker, and the worker is thus provided with higher evaluation points. 
     The refrigerant to-be-collected quantity is adopted when the worker is the installation worker C 1  or the maintenance worker C 1 . The refrigerant to-be-collected quantity specifically indicates refrigerant quantity expected to be collected by the collection worker C 1  in the total refrigerant quantity used in the refrigerant use devices  30  as own work targets. The refrigerant to-be-collected quantity is exemplified by total refrigerant quantity filled in the refrigerant use device  30  after elapse of the predetermined period since installation or start of use. The predetermined period is set in accordance with the type of the refrigerant being used, the model of the refrigerant use device  30 , and the like. Larger refrigerant to-be-collected quantity of the installation worker C 1  or the maintenance worker C 1  indicates more active involvement in refrigerant collection by the worker, and the worker is thus provided with higher evaluation points. 
     The evaluation unit  27  may provide each of the workers with evaluation points by totaling the refrigerant collected quantity and the refrigerant to-be-collected quantity for each of the workers. 
       FIG. 18  is a graph indicating a relation between the evaluation points provided to the worker and the refrigerant suppliable quantity calculated in accordance with the evaluation points.  FIG. 18  includes two lines L 1  and L 2 . The lines L 1  and L 2  each indicate a method of calculating the refrigerant suppliable quantity by the evaluation unit  27  in accordance with the evaluation points. As indicated in  FIG. 18 , the refrigerant suppliable quantity increases with higher evaluation points. 
     As indicated by the line L 1  in  FIG. 18 , the evaluation unit  27  may calculate the refrigerant suppliable quantity such that the evaluation points provided to the worker and the refrigerant suppliable quantity have a proportional relation. As indicated by the line L 2  in  FIG. 18 , the evaluation unit  27  may calculate the refrigerant suppliable quantity such that the refrigerant suppliable quantity has a higher increase rate as the worker is provided with higher evaluation points. 
     The modification example H is applicable to the present modification example. In other words, the evaluation points provided to the worker may be provided in accordance with a different reference in addition to the refrigerant collected quantity or the refrigerant to-be-collected quantity 
     In a case where the worker newly inputs to the input terminal  10  information of the refrigerant use device  30  used for own work and transmits the information to the management server  20  for registration, the evaluation unit  27  may increase the evaluation points of the worker. The refrigerant quantity expected to be collected from the refrigerant use device  30  used for work by the worker increases when the worker newly registers the refrigerant use device  30  to the management server  20 . The evaluation unit  27  can thus provide higher evaluation points to the worker with larger refrigerant quantity (the refrigerant to-be-collected quantity) expected to be collected from the refrigerant use device  30 , and can stimulate the worker to register, to the management server  20 , the information on the refrigerant use device  30  used for work or the like. 
     The evaluation unit  27  may lower the evaluation points of the worker as necessary. For example, after supply of the refrigerant to the worker from the distribution worker C 5 , the evaluation unit  27  may lower the evaluation points of the worker having supplied with the refrigerant in accordance with the refrigerant supplied quantity This inhibits a problem that the worker with low evaluation points is continuously less likely to be supplied with the refrigerant and the refrigerant is not appropriately distributed to a plurality of workers. 
     (5-11) Modification Example K 
     The storage unit  22  stores the second information T 92  indicated in  FIG. 13 . The storage unit  22  may further store information on a service provided to the worker as to the refrigerant used in the refrigerant use device  30  and executed. For example, in a case where the service relates to refrigerant supply, the storage unit  22  may further store information on refrigerant quantity supplied to each of the workers as a service. 
     (5-12) Modification Example L 
     The evaluation unit  27  calculates the refrigerant suppliable quantity for each of the workers in accordance with total quantity of the refrigerant to-be-collected quantity and the refrigerant collected quantity included in the second information T 92  indicated in  FIG. 13 , and the refrigerant distributed quantity included in the second information T 92 . The refrigerant used in the refrigerant use device  30  is not entirely collected, the collected refrigerant is not entirely regenerated. The refrigerant suppliable quantity is thus less than the total quantity of the refrigerant to-be-collected quantity and the refrigerant collected quantity The refrigerant suppliable quantity may exemplarily be calculated in accordance with the following equation. 
       Refrigerant suppliable quantity=(refrigerant collected quantity× a )+(refrigerant to-be-collected quantity× b )+refrigerant regenerated quantity
 
     The above equation includes coefficients a and b each having a numerical value equal to or more than zero and less than one, and the coefficients a and b are appropriately set by the manager of the refrigerant management system  100 . The coefficient a exemplarily having 0.9 indicates that 90% of the refrigerant collected by the collection worker C 1  is to be regenerated so as to be suppliable. The coefficient b exemplarily having 0.3 indicates that 30% of the refrigerant used in the refrigerant use device  30  is to be collected and regenerated so as to be suppliable. Each of the coefficients a and b may set to have a different value depending on the refrigerant type. The above equation assumes that the refrigerant regenerated quantity is entirely suppliable. 
     Information other than the refrigerant collected quantity, the refrigerant to-be-collected quantity, and the refrigerant regenerated quantity may be used for calculation of the refrigerant suppliable quantity The refrigerant suppliable quantity may alternatively be calculated with further reference to information on the refrigerant used in the refrigerant use device  30  to be used no more or be discarded. The refrigerant suppliable quantity may still alternatively be calculated with further reference to the refrigerant supplied quantity that is refrigerant quantity already supplied to the worker. For example, in this case, the refrigerant suppliable quantity may be calculated such that the worker having larger refrigerant supplied quantity has smaller refrigerant suppliable quantity 
     (5-13) Modification Example M 
     The evaluation unit  27  calculates the refrigerant suppliable quantity in accordance with the refrigerant to-be-collected quantity and the refrigerant collected quantity included in the second information T 92  indicated in  FIG. 13 . The evaluation unit  27  may alternatively calculate the refrigerant suppliable quantity further in consideration of a different element such as a refrigerant regeneration result of the worker and the refrigerant quantity held by the worker. Description is made next to an exemplary method of calculating refrigerant suppliable quantity 
       FIG. 19  is a flowchart depicting calculation of refrigerant suppliable quantity S.  FIG. 19  includes processing in step S 21  to step S 25 . The processing depicted in  FIG. 19  is executed for each worker, and the refrigerant suppliable quantity S is calculated for each worker. The worker is a refrigerant supply target and corresponds to the installation worker C 1  and the maintenance worker C 1 . 
     Step S 21  involves calculating collectable refrigerant quantity A for each of the workers. The collectable refrigerant quantity A is total refrigerant quantity filled in all the refrigerant use devices  30  as refrigerant collection targets and work targets of the worker. The refrigerant use devices  30  as refrigerant collection targets include the refrigerant use device  30  after elapse of a predetermined use period since an installation date, and the refrigerant use device  30  on a predetermined day with the predetermined use period having been elapsed since the installation date. The predetermined use period differs in accordance with the model of the refrigerant use device  30 , and is  10  years or the like. Examples of the predetermined day include one year after present time. The refrigerant quantity filled in the refrigerant use device  30  specifically indicates refrigerant used quantity included in the second information T 22 , and is obtained by totaling the refrigerant already filled quantity and the total refrigerant additionally filled quantity 
     Step S 22  involves calculating refrigerant regeneration predictive quantity P for each of the workers in accordance with the collectable refrigerant quantity A. The refrigerant regeneration predictive quantity P is refrigerant quantity predicted to be regenerated before the predetermined day in the collectable refrigerant quantity A. The refrigerant regeneration predictive quantity P is calculated in accordance with the following equation. 
     Refrigerant regeneration predictive quantity P =collectable refrigerant quantity A x regeneration solid volume percentage r 
     Regeneration solid volume percentage r =most recent regenerated quantity W/most recent filled quantity R 
     The most recent filled quantity R corresponds to refrigerant quantity filled in all the refrigerant use devices  30  having the refrigerant collected within a most recent predetermined period. The most recent regenerated quantity W corresponds to refrigerant quantity collected and regenerated within the most recent predetermined period in the most recent filled quantity R. Examples of the most recent predetermined period include a period within a past one year. 
     Step S 23  involves calculating total refrigerant regeneration predictive quantity SP obtained by totaling the refrigerant regeneration predictive quantity P of all the workers registered to the refrigerant management system  100 . 
     Step S 24  involves calculating the refrigerant suppliable quantity S for each of the workers in accordance with the total refrigerant regeneration predictive quantity SP. The refrigerant suppliable quantity S is calculated in accordance with the following equation. 
       Refrigerant suppliable quantity  S =(total refrigerant regeneration predictive quantity  SP +refrigerant stocked quantity  a )×share percentage  p  
 
     The refrigerant stocked quantity a is, for example, refrigerant quantity stored by the distribution worker C 5  and suppliable to the worker. The share percentage p is determined for each of the workers. Refrigerant quantity to be supplied increases as the share percentage p is higher. The share percentage p is determined in accordance with various parameters. The share percentage p may be determined in accordance with the refrigerant to-be-collected quantity, the refrigerant collected quantity, the refrigerant regenerated quantity, the refrigerant supplied quantity, the regeneration solid volume percentage, a type of business of the worker, and a sales ratio. The refrigerant supplied quantity corresponds to refrigerant quantity supplied to the worker within the most recent predetermined period. The sales ratio is exemplarily a proportion of the refrigerant use devices  30  manufactured by a predetermined device manufacturer in all the refrigerant use devices  30  as work targets of the worker. The share percentage p may be determined in accordance with the priority order, the evaluation points, and the like provided to each of the workers described above. 
     (5-14) Modification Example N 
     The execution date corresponds to the work day or the work month in the embodiment. The work day or the work month according to the embodiment corresponds to a day or a month of registration of at least one of the installation information and the maintenance information. The work day may be at least one of the day of actual installation by the installation worker C 1 , and the day of actual maintenance by the maintenance worker C 1 . The work month may be at least one of the month of actual installation by the installation worker C 1 , and the month of actual maintenance by the maintenance worker C 1 . In this case, the management server  20  may cause the installation worker C 1  and the maintenance worker C 1  to input the work day or the work month. 
     (6) Conclusion 
     The embodiment of the present disclosure has been described above. Various modifications to modes and details should be available without departing from the object and the scope of the present disclosure recited in the claims 
     INDUSTRIAL APPLICABILITY 
     The refrigerant management system is applicable for management of refrigerant quantity used in the refrigerant use device. 
     The refrigerant management system is applicable for appropriate supply of the refrigerant to the worker needing the refrigerant. 
     REFERENCE SIGNS LIST 
       20 : management server (computer) 
       21 : acquisition unit 
       22 : storage unit 
       23 : generation unit 
       27 : evaluation unit 
       30 : refrigerant use device 
       100 : refrigerant management system 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: JP 2015-125672 A