Patent Publication Number: US-2021172638-A1

Title: Air conditioner management device, and air conditioner management screen generation method

Description:
TECHNICAL FIELD 
     Embodiments of the present invention relate to an air conditioner management device and an air conditioner management screen generation method. 
     BACKGROUND ART 
     Usually, a large number of pieces of equipment are installed in a large building such as a school, hospital, and office building, and a management system is constructed so that the equipment is centrally managed by a central management device. The central management device sequentially acquires and holds operating status information from the equipment. 
     In addition, the central management device is configured to be communicable with an equipment management device, which is an operation terminal for the manager of the equipment to manage the equipment, and the manager can use the operation terminal to check the working status of the equipment and perform operations. 
     CITATION LIST 
     PATENT LITERATURE 
     Patent Literature 1: JP 2010-255954 A 
     SUMMARY OF INVENTION 
     In recent years, as operation terminals for performing equipment management, terminals using a touch panel such as tablet terminals have been frequently used. In managing air conditioners in a building with a terminal, the touch panel presents a management screen in which icons corresponding to the air conditioners are arranged. These icons contain information that indicates the working status of the corresponding air conditioners. By looking at the management screen on which these icons are displayed, the manager can grasp the ON/OFF states and the currently set working modes of the air conditioners such as a cooling mode and a heating mode. 
     However, when there are many air conditioners to be managed, it is not possible to display all the icons on the touch panel of the terminal at the same time. Therefore, in order to grasp the working status of all the air conditioners in the building, the manager needs to view the display screen information while scrolling the screen, which is time-consuming. 
     The present invention has been made in view of the above circumstances. An object of the present invention is to provide an air conditioner management device that is capable of displaying a management screen allowing easy grasping of the working status of all air conditioners even when a large number of air conditioners are to be managed, and an air conditioner management screen generation method. 
     In order to achieve the above object, an air conditioner management device that has a plurality of air conditioners as management targets, includes: a displayed-information generation unit that, as for the plurality of air conditioners, generates display information on a summary screen including mode-specific working unit number information indicating the number of air conditioners currently in an ON state in each set working mode and mode-specific stopped unit number information indicating the number of air conditioners currently in an OFF state in each set working mode; and a display unit that displays the display information generated by the displayed-information generation unit. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an overall view of an air conditioning system using tablet terminals, as an air conditioner management device according to an embodiment of the present invention. 
         FIG. 2  is a block diagram of a configuration of the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 3  is a flowchart illustrating operations of the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 4  is an example of a main management screen displayed on the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 5  is an example of a horizontally long overall summary screen displayed on the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 6  is an example of a control screen displayed on the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 7  is an example of a horizontally long summary screen for each floor displayed on the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
         FIG. 8  is an example of a vertically long overall summary screen displayed on the tablet terminal as the air conditioner management device according to the embodiment of the present invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     &lt;Configuration of Air Conditioning System Using Air Conditioner Management Devices According to Embodiment&gt; 
     As an embodiment of the present invention, a configuration of an air conditioning system using a tablet terminal as air conditioner management devices will be described with reference to  FIG. 1 . An air conditioning system  1  according to the present embodiment includes: 128 air conditioners to be managed (indoor equipment)  10 - 1  to  10 - 128  that are installed in a four-story building X; a controller  20  as a central management device that is connected to the air conditioners  10 - 1  to  10 - 128 ; wireless communication access points  40 - 1  to  40 - 3  that are connected to the controller  20  via a hub  30 ; a tablet terminal  50 - 1  that is wirelessly connected to the access point  40 - 1 ; a tablet terminal  50 - 2  that is wirelessly connected to the access point  40 - 2 ; and a tablet terminal  50 - 3  that is wirelessly connected to the access point  40 - 3 . The tablet terminals  50 - 1  to  50 - 3  are operated by the manager of the air conditioning system  1 . In the air conditioning system  1 , the tablet terminals  50 - 1  to  50 - 3  correspond to air conditioner management devices. The number of tablet terminal used in the air conditioning system  1  may be one. 
     Store A is located on the first floor of the building X, and the air conditioners  10 - 1  to  10 - 32  are installed in the store A. Store B is located on the second floor, and the air conditioners  10 - 33  to  10 - 64  are installed in the store B. Store C is located on the third floor, and the air conditioners  10 - 65  to  10 - 96  are installed in the store C. Store D is located on the fourth floor, and the air conditioners  10 - 97  to  10 - 128  are installed in the store D. The air conditioners  10 - 1  to  10 - 128  are configured to be workable in an working modes, that is, cooling mode, heating mode, ventilation mode, or dehumidification mode. 
     Hereinafter, the air conditioners  10 - 1  to  10 - 128  will be described as “air conditioners  10 ” unless it is necessary to specify any of them. Similarly, the tablet terminals  50 - 1  to  50 - 3  will be described as “tablet terminals  50 ” unless it is necessary to specify any of them. Similarly, the access points  40 - 1  to  40 - 3  will be described as “access points  40 ” unless it is necessary to specify any of them. 
     The controller  20  communicates with the air conditioners  10 - 1  to  10 - 128  to transmit working-control information for controlling the working of the air conditioners  10 - 1  to  10 - 128  as needed, and acquire working status information of the air conditioners  10 - 1  to  10 - 128  at predetermined time intervals. This working status information includes at least information on the working/stopped (ON/OFF) state, set working mode, set temperature, air volume, and wind direction of each air conditioner  10 . 
     As illustrated in  FIG. 2 , each tablet terminal  50  has a touch panel  51 , a CPU  52 , and a communication unit  53 . The touch panel  51  has an operation information detection unit  511  and a display unit  512 . The operation information detection unit  511  detects the position of an operation performed by the contact of a manager&#39;s finger or the like on the touch panel  51 , and the operation type such as tap operation or swipe operation. The display unit  512  displays the display information generated by a displayed-information generation unit  522  described later. The communication unit  53  sequentially performs communication with the controller  20  via the access points  40 , issues various instructions regarding operation to the air conditioners  10 - 1  to  10 - 128 , and acquires the working status information of the air conditioners  10 - 1  to  10 - 128  from the controller  20 . 
     The CPU  52  has an operation determination unit  521 , a displayed-information generation unit  522 , and a working-control information generation unit  523 . The operation determination unit  521  determines the content of the operation performed by the manager based on the operation information detected by the operation information detection unit  511  and the display information generated by the displayed-information generation unit  522 . That is, the operation determination unit  521  determines the content of the operation from a combination of the content of the display information at the operation position detected by the operation information detection unit  511  and the type of the applied operation, and outputs the corresponding operation information. Examples of the content of the operation include an operation of displaying a summary screen regarding the working status of the air conditioners to be managed, an operation of displaying a control screen for manipulating the operation of a predetermined one of the air conditioners, an operation of changing the content of working of a predetermined one of the air conditioners based on the operation information on the summary screen or control screen. The displayed-information generation unit  522  generates display information to be displayed on the display unit  512 , based on the content of the operation determined by the operation determination unit  521  and the working status information of the air conditioners  10 - 1  to  10 - 128  acquired from the controller  20 . In addition, the displayed-information generation unit  522  updates as appropriate the working status information of the air conditioners  10 - 1  to  10 - 128  in the generated display information to the latest information. The working-control information generation unit  523  generates working control information of the air conditioner  10  to be operated based on the content of the operation determined by the operation determination unit  521 . 
     &lt;Operations of Air Conditioning System Using Air Conditioner Management Device According to Embodiment&gt; 
     Next, the operations of the air conditioning system  1  according to the present embodiment will be described with reference to the flowchart of  FIG. 3  and the screen configuration diagrams of  FIGS. 4 to 8 . In the air conditioning system  1 , the controller  20  acquires and holds the working status information of the air conditioners  10 - 1  to  10 - 128  at predetermined time intervals. 
     When the manager starts the management work of the air conditioners  10 - 1  to  10 - 128  using the tablet terminal  50 , the displayed-information generation unit  522  acquires the latest working status information of the air conditioners  10 - 1  to  10 - 128  from the controller  20 , and generates display information to be presented on a main management screen  60  using the acquired information. 
     The main management screen  60  has area display sections  61 - 1  to  61 - 4  and air conditioner icon display sections  62 - 1  to  62 - 4  corresponding to the first floor (store A) to the fourth floor (store D), respectively. Text information “first floor (store A)” is located in the area display section  61 - 1  corresponding to the first floor, and air conditioner icons  63 - 1  to  63 - 32  corresponding to the air conditioners  10 - 1  to  10 - 32  installed on the first floor are located in the air conditioner icon display section  62 - 1 . Text information “second floor (store B)” is located in the area display section  61 - 2  corresponding to the second floor, and air conditioner icons  63 - 33  to  63 - 64  corresponding to the air conditioners  10 - 33  to  10 - 64  installed on the second floor are located in the air conditioner icon display section  62 - 2 . Text information “third floor (store C)” is located in the area display section  61 - 3  corresponding to the third floor, and air conditioner icons  63 - 65  to  63 - 96  corresponding to the air conditioners  10 - 65  to  10 - 96  installed on the third floor are located in the air conditioner icon display section  62 - 3 . Text information “fourth floor (store D)” is located in the area display section  61 - 4  corresponding to the fourth floor, and air conditioner icons  63 - 97  to  63 - 128  corresponding to the air conditioners  10 - 97  to  10 - 128  installed on the fourth floor are located in the air conditioner icon display section  62 - 4 . 
     These air conditioner icons  63 - 1  to  63 - 128  functions as operation switches for switching ON/OFF of the corresponding air conditioners  10 - 1  to  10 - 128 . The display information in these area display section and air conditioner icon display section is appropriately changed depending on the number of floors of the building to be managed and the number of air conditioners installed. 
     The generated display information on the main management screen  60  is sent to and displayed on the display unit  512  of the touch panel  51  (S 1 ).  FIG. 4  illustrates an example of the main management screen  60  displayed on the display unit  512 . In  FIG. 4 , since all the information of the main management screen  60  cannot be displayed on the display unit  512 , some portions of the area display section  61 - 2  and the air conditioner icon display section  62 - 2  in the main management screen  60  are displayed on the display unit  512 . Text information “second floor (store B)” is displayed in the area display section  61 - 2 , and the air conditioner icons  63 - 33  to  63 - 47  are displayed in the air conditioner icon display section  62 - 2 . Of the display information on the main management screen  60 , information that currently does not appear can be displayed by moving the display area in the main management screen  60  with the operation of the scroll bar  64  at the right end of the screen. 
     These air conditioner icons  63 - 33  to  63 - 47  are displayed in different colors or brightness based on the ON/OFF states of the corresponding air conditioners. For example, the air conditioner icons corresponding to the air conditioners in the ON state are displayed in color graphics, and the air conditioner icons corresponding to the air conditioners in the OFF state are displayed in monochrome and low-brightness graphics. In  FIG. 4 , the air conditioner icons  63 - 37 ,  63 - 41 , and  63 - 47  are displayed in monochrome and low-brightness graphics, indicating that the corresponding air conditioners  10 - 37 ,  10 - 41 ,  10 - 47  are in the OFF state. A mark indicating the occurrence of an error is displayed at the display position of the air conditioner icon  63 - 46 , indicating that the corresponding air conditioner  10 - 46  has caused an error and is in the OFF state. The other air conditioner icons  63 - 33  to  63 - 36 ,  63 - 38  to  63 - 40 ,  63 - 42  to  63 - 45  are displayed in color graphics, indicating that the corresponding air conditioners  10 - 33  to  10 - 36 ,  10 - 38 - 10 - 40 , and  10 - 42 - 10 - 45  are in the ON state. 
     In addition, each icon includes a mark indicating the working mode currently set for the corresponding air conditioner. In  FIG. 4 , the air conditioner icons  63 - 33  to  63 - 38 ,  63 - 41  to  63 - 45 , and  63 - 47  contain a mark representing the cooling mode, which indicates that the corresponding air conditioners  10 - 33  to  10 - 38 ,  10 - 41  to  10 - 45 , and  10 - 47  are currently set to the cooling mode. The air conditioner icon  63 - 39  contains a mark indicating the heating mode, which indicates that the corresponding air conditioner  10 - 39  is currently set to the heating mode. The air conditioner icon  63 - 40  contains a mark indicating the dehumidification mode, which indicates that the corresponding air conditioner  10 - 40  is currently set to the dehumidification mode. 
     The marks contained in the air conditioner icons  63 - 37 ,  63 - 41 , and  63 - 47  corresponding to the air conditioners currently in the OFF state represent the working modes in which the air conditioners have worked most recently. The working mode in which an air conditioner has worked most recently is maintained even in the OFF state, and when the air conditioner in the OFF state is turned on, the working is restarted in the working mode. 
     Further, in the upper right of the main management screen  60  of  FIG. 4 , displayed is working status simple information  65  that simply indicates the working status of all the air conditioners in the building X. In  FIG. 4 , as the working status simple information  65 , displayed are a mark and text information “116” indicating the number of the air conditioners in the ON state in the building X and a mark and text information “3” indicating the number of the air conditioners in the error state. 
     By looking at the main management screen  60 , the manager can grasp the ON/OFF states and the currently set working modes of the air conditioners. 
     While the main management screen  60  is being displayed, the display information is appropriately updated based on the latest information acquired by the displayed-information generation unit  522  from the controller  20  at predetermined time intervals. 
     On the main management screen  60  displayed in this way, when the manager taps at any position in the display information of the mark and the text information “116” indicating the number of the air conditioners in the ON state in the working status simple information  65  (“YES” in S 2 ), the displayed-information generation unit  522  aggregates the number of working air conditioners in each of the working modes and the number of stopped air conditioners in each of the working modes based on the latest working status information of the air conditioners  10 - 1  to  10 - 128 . Then, an overall summary screen  70 A indicating the detailed working status of the air conditioners in the entire building X is generated and displayed on the display unit  512  (S 3 ). 
       FIG. 5  illustrates an example of the overall summary screen  70 A displayed on the display unit  512 . The overall summary screen  70 A of  FIG. 5  is configured in a horizontally long manner, and has at the upper left part, total working unit number information  71  that indicates the number of the air conditioners currently in the ON state in the building X, and graphical information  72  that indicates the proportion of the number of the air conditioners in the ON state to the total number of the air conditioners by the length of an arc. The overall summary screen  70 A also has at the lower left part, total stopped unit number information  73  displayed, which indicates the number of the air conditioners currently in the OFF state in the building X. 
     The overall summary screen  70 A further has at the upper central part, graphic icons corresponding to the respective working modes (automatic working mode, cooling mode, heating mode, ventilation mode, and dehumidification mode) displayed in a horizontal row, and under the corresponding icons (working mode icons), has mode-specific working unit number information  74  displayed, indicating the number of the air conditioners currently in the ON state in the set working modes of all the air conditioners in the building X, and further under the mode-specific working unit number information  74 , has mode-specific stopped unit number information  75  displayed, indicating the number of the air conditioners currently in the OFF state in the set working modes of all the air conditioners in the building X. That is, the working mode icons, the mode-specific working unit number information  74 , and the mode-specific stopped unit number information  75  are arranged at positions vertically corresponding to the working modes. 
     The overall summary screen  70 A has “ALL ON” button information  76  displayed at the upper right part, which is first information for performing an operation to turn all the air conditioners in the building X into the ON state. The “ALL ON” button information  76  includes a square frame and the characters “ALL ON” arranged in almost the center of the frame. The overall summary screen  70 A has “ALL OFF” button information  77  displayed at the lower right part, which is second information for performing an operation to turn all the air conditioners in the building X into the OFF state. The “ALL OFF” button information  77  includes a square frame and the characters “ALL OFF” arranged in almost the center of the frame. 
     The “ALL ON” button information  76  is displayed at a position corresponding to the total working unit number information  71  and the mode-specific working unit number information  74  which are information on the number of the air conditioners in the ON state, for example, in  FIG. 5 , on the right side of the information on the number of the air conditioners in the ON state. The “ALL OFF” button information  77  is displayed at a position corresponding to the total stopped unit number information  73  and the mode-specific stopped unit number information  75  which are information on the number of the air conditioners in the OFF state, for example, in  FIG. 5 , on the right side of the information on the number of the air conditioners in the OFF state. That is, the “ALL ON” button information  76  and the “ALL OFF” button information  77  are arranged at vertically corresponding positions. This display makes it easier for the manager to recognize the functions of the “ALL ON” button information  76  and the “ALL OFF” button information  77 . 
     Since the “ALL ON” button information  76  is set to the height (length) covering both the working mode icons and the mode-specific working unit number information  74 , the “ALL ON” button information  76  is longer heightwise than the “ALL OFF” button information  77 . Therefore, the “ALL ON” button information  76  and the “ALL OFF” button information  77  have the same width, but the quadrangular frame of the “ALL ON” button information  76  has the shape of an almost square, and the quadrangular frame of the “ALL OFF” button information  77  has the shape of a horizontally long rectangle. 
     When the manager taps at the position of the “ALL ON” button information  76 , the working-control information generation unit  523  generates ON control information for switching the air conditioners in the OFF state to the ON state in the currently set working modes, and transmits the ON control information to the corresponding air conditioners  10  via the controller  20 . The air conditioners  10  for which the ON control information has been acquired are switched from the OFF state to the ON state in the currently set working modes. No instruction is given to the air conditioners  10  that are already in the ON state, and these air conditioners  10  remain in the ON state. When the manager taps at the position of the “ALL ON” button information  76 , the displayed-information generation unit  522  updates the information  71  to  75  displayed in the overall summary screen  70 A. Specifically, the displayed-information generation unit  522  updates the information such that the values of the corresponding working modes in the mode-specific working unit number information  74  increase by the number of the air conditioners  10  that have been switched to the ON state by this operation. The displayed-information generation unit  522  also updates the information such that the values of all the working modes in the mode-specific stopped unit number information  75  become “ 0 ”. 
     On the other hand, when the manager taps at the position of the “ALL OFF” button information  77 , the working-control information generation unit  523  generates OFF control information for switching the air conditioners in the ON state to the OFF state, and transmits the OFF control information to the corresponding air conditioners  10  via the controller  20 . The air conditioners  10  for which the OFF control information has been acquired are switched from the ON state to the OFF state. No instruction is given to the air conditioners  10  that are already in the OFF state, and these air conditioners  10  remain in the OFF state. 
     When the manager taps at the position of the “ALL OFF” button information  77 , the displayed-information generation unit  522  updates the information  71  to  75  displayed in the overall summary screen  70 A. Specifically, the displayed-information generation unit  522  also updates the information such that the values of all the working modes in the mode-specific working unit number information  74  become “0”. In addition, the displayed-information generation unit  522  updates the information such that the values of the corresponding working modes (the working modes immediately before turning to the OFF state) in the mode-specific stopped unit number information  75  increase by the number of the air conditioners  10  that have been switched to the OFF state by this operation. 
     While the overall summary screen  70 A is displayed, the displayed-information generation unit  522  appropriately aggregates the number of working units and the number of stopped units in each of the working modes based on the latest information acquired from the controller  20  at predetermined time intervals, and updates the display information. 
     The overall summary screen  70 A also has “CLOSE” button information  78  displayed at the lower right part, and when the manager taps at the position of the 
     “CLOSE” button information  78  (“YES” in S 4 ), the touch panel  51  returns to the state in which the main management screen  60  of  FIG. 4  is displayed. 
     When the manager taps one of the air conditioner icons, for example, the air conditioner icon  63 - 35  on the main management screen  60  of  FIG. 4  (“NO” in S 2  to “YES” in S 5 ), the displayed-information generation unit  522  generates a control screen  80 - 35  for operating the detailed working contents of the corresponding air conditioner  10 - 35  and displays the same on the display unit  512  (S 6 ). 
       FIG. 6  illustrates an example of the control screen  80 - 35  displayed on the display unit  512 . The control screen  80 - 35  of  FIG. 6  is horizontally long, and has displayed start/stop (ON/OFF) button information  801 , automatic working mode button information  802 , cooling mode button information  803 , heating mode button information  804 , ventilation mode button information  805 , dehumidification mode button information  806 , set temperature information  807 , set temperature change button information  808 , wind direction change button information  809 , air volume change button information  810 , lock button information  811 , and option button information  812 . 
     With these pieces of information displayed, when the manager performs a touch operation at the position of any button information on the control screen  80 - 35 , the operation information detection unit  511  detects the operation information. Then, the operation determination unit  521  determines the content of the operation performed by the manager based on the operation information detected by the operation information detection unit  511  and the display information generated by the displayed-information generation unit  522 . When the operation determination unit  521  determines the content of the operation, the working-control information generation unit  523  generates working control information of the air conditioner  10 - 35  to be operated, based on the determined content of the operation. The generated working control information is transmitted to the corresponding air conditioner  10 - 35  via the communication unit  53  and the controller  20 , and the content of the working is changed. 
     In other words, by operating these buttons, the manager can turn ON/OFF a predetermined air conditioner, change the working mode, change the set temperature, change the wind direction, change the air volume, prohibit the acceptance of operations, set optional functions, and the like. 
     In addition, when the operation determination unit  521  determines the content of the operation, the displayed-information generation unit  522  changes the corresponding button information in the control screen  80 - 35  based on the determined content of the operation. 
     In  FIG. 6 , on the left side of the control screen  80 - 35 , displayed is a part of a control screen  80 - 34  for performing the detailed contents of working of the air conditioner  10 - 34 . When the manager performs a flick operation to the right on the touch panel  51 , the control screen  80 - 34  moves to the center of the touch panel  51 . In addition, on the right side of the control screen  80 - 35 , displayed is a part of a control screen  80 - 36  for performing the detailed contents of working of the air conditioner  10 - 36 . When the manager performs a flick operation to the left on the touch panel  51 , the control screen  80 - 36  moves to the center of the touch panel  51 . 
     Also, by repeating the flick operation to the right, when the flick operation to the right is further performed (“YES” in S 7 ) while the first air conditioner  10 - 33  among the air conditioners on the second floor currently being operated is displayed in the center, the displayed-information generation unit  522  generates a floor-specific summary screen  90 A representing the detailed working status of the air conditioners  10 - 33  to  10 - 64  on the second floor, and displays the same on the display unit  512  (S 8 ). 
       FIG. 7  illustrates an example of the floor-specific summary screen  90 A displayed on the display unit  512 . The floor-specific summary screen  90 A of  FIG. 7  is configured horizontally, and has at the upper left part, total working unit number information  91  that indicates the number of the air conditioners currently in the ON state on the second floor, and graphical information  92  that indicates the proportion of the number of the air conditioners in the ON state to the total number of the air conditioners on the second floor by the length of an arc, displayed. The floor-specific summary screen  90 A also has at the lower left part, total stopped unit number information  93  displayed, which indicates the number of the air conditioners in the OFF state on the second floor. 
     The floor-specific summary screen  90 A also has in the upper central part, mode-specific working unit number information  94  displayed, which indicates the number of the air conditioners on the second floor currently in the ON state in each of the working modes (the automatic working mode, cooling mode, heating mode, ventilation mode, and dehumidification mode), and has in the lower central part, mode-specific stopped unit number information  95  displayed, which indicates the number of the air conditioners currently in the OFF state in each of the working modes. 
     The floor-specific summary screen  90 A has at the upper right part, “ALL ON” button information  96  displayed, for performing an operation to turn all the air conditioners on the second floor into the ON state. The floor-specific summary screen  90 A has at the lower right part, “ALL OFF” button information  97  for performing an operation to turn all the air conditioners on the second floor into the OFF state. 
     In  FIG. 7 , on the right side of the floor-specific summary screen  90 A, displayed is a part of a control screen  80 - 33 . When the manager performs a flick operation to the left on the touch panel  51 , the control screen  80 - 33  moves to the center of the touch panel  51 . 
     A leftward arrow mark  81  is displayed at the upper left part of the control screen  80 - 35  of  FIG. 6 . When the manager taps the leftward arrow mark  81 , the touch panel  51  returns to the state in which the main management screen  60  of  FIG. 4  is displayed. In addition, a leftward arrow mark  98  is displayed at the upper left part of the floor-specific summary screen  90 A of  FIG. 7 . When the manager taps the leftward arrow mark  98 , the touch panel  51  similarly returns to the state in which the main management screen  60  of  FIG. 4  is displayed. 
     According to the above embodiment, even when a large number of air conditioners is to be managed, it is possible to easily display screens for grasping the working status of all the air conditioners. Specifically, for a large number of air conditioners to be managed, a summary screen including the number of the air conditioners in the ON state in each of the working modes and the number of the air conditioners in the OFF state in each of the working modes can be displayed. 
     By displaying such a summary screen, for example, if any air conditioner is working in the heating mode or is stopped in the setting of the heating mode when all the air conditioners should be set to the cooling mode in midsummer, the manager can easily notice this condition and change the setting. In particular, even if the number of air conditioners to be managed is large and all the air conditioner icons cannot be displayed at the same time as illustrated in  FIG. 4 , the manager can easily recognize the working status of all the air conditioners without performing a scroll operation or the like. 
     In the above-described embodiment, the overall summary screen  70 A and the floor-specific summary screen  90 A are configured to be horizontally long, but they may be configured to be vertically long instead.  FIG. 8  illustrates an example of a vertically long overall summary screen  70 B. 
     The overall summary screen  70 B has at the upper left part, total working unit number information  71  displayed, which indicates the number of the air conditioners currently in the ON state in the building X, and graphical information  72  displayed, which indicates the proportion of the number of the air conditioners in the ON state to the total number of the air conditioners by the length of an arc, and has thereunder total stopped unit number information  73  displayed, which indicates the number of the air conditioners in the OFF state in the building X. 
     The overall summary screen  70 B also has in the central left part, mode-specific working unit number information  74  displayed, which indicates the number of the air conditioners currently in the ON state in each of the working modes (the automatic working mode, cooling mode, heating mode, ventilation mode, and dehumidification mode) of all the air conditioners in the building X, and has in the central right part, mode-specific stopped unit number information  75  displayed, which indicates the number of the air conditioners currently in the OFF state in each of the working modes of all the air conditioners in the building X. 
     The overall summary screen  70 B also has at the lower left side “ALL ON” button information  76  displayed, for performing an operation of turning all the air conditioners in the building X into the ON state and has in the lower right side “ALL OFF” button information  77  displayed, for performing an operation of turning all the air conditioners in the building X into the OFF state. That is, the “ALL ON” button information  76  is displayed at a position corresponding to the mode-specific working unit number information  74  that is information on the number of the air conditioners in the ON state, and the “ALL OFF” button information  77  is displayed at a position corresponding to the mode-specific stopped unit number information  75  that is information on the number of the air conditioners in the OFF state. The overall summary screen  70 B also has “CLOSE” button information  78  displayed at the lower right part, and when the manager taps at the position of the “CLOSE” button information  78  (“YES” in S 4 ), the touch panel  51  returns to the state in which the main management screen  60  of  FIG. 4  is displayed. Similarly, the floor-specific summary screen may be configured to be vertically long. In this way, configuring the screens by arranging each of information such that the information indicating the working or stopped states of the air conditioners and the button information for performing ON or OFF operation on all the air conditioners are arranged in pairs, allows the user to grasp the working status of the air conditioners and comprehend the contents of operations of the air conditioners, thereby to reduce the risks of erroneous operations and false recognition of working states of the air conditioners. 
     In the present embodiment, one air conditioner is associated with one air conditioner icon. However, the present invention is not limited to this, and a plurality of air conditioners may be associated with one air conditioner icon. When a plurality of air conditioners is associated with one air conditioner icon, the working of the corresponding plurality of air conditioners can be collectively controlled by operating the air conditioner icon. 
     Normally, when the air conditioner  10  is in the OFF state, the working mode cannot be changed from the remote controller (not illustrated) supplied to the air conditioner  10 , and during in the OFF state, the air conditioner  10  is maintained in the working mode in which the air conditioner  10  has worked (been ON) most recently. That is, the working mode can be changed from the remote controller only when the air conditioner  10  is in the ON state. 
     To handle this, the working mode of the air conditioner  10  in the OFF state may be changeable using the main management screen  60  or the control screen  80 , from the tablet terminal  50  used in the present embodiment. In this case, when an operation of changing the working mode of the air conditioner  10  is performed on the control screen  80  related to the air conditioner  10  in the OFF state, the working mode set to the air conditioner  10  is changed using the working control information generated by the working-control information generation unit  523  in response to the operation. Specifically, the working mode set to the air conditioner  10  in the OFF state is the working mode in which it has worked most recently, or the latest working mode changed by the operation on the tablet terminal  50  after turning to the OFF state. Then, when the air conditioner  10  is next switched to the ON state, the air conditioner starts to work in the set working mode. 
     In the above embodiment, the tablet terminal  50  has been described as an air conditioner management device. Alternatively, the controller  20  may be provided with a touch panel, and the various functions described in relation to the tablet terminal  50  described above may be incorporated into the controller  20  so that the controller  20  can be both the central management device and the air conditioner management device. 
     Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.