Patent Publication Number: US-2023147059-A1

Title: Air conditioning system, air-conditioning control program, and storage medium storing air-conditioning control program

Description:
TECHNICAL FIELD 
     The present invention relates to an air conditioning system, an air-conditioning control program, and a storage medium storing an air-conditioning control program. 
     BACKGROUND ART 
     In a house including a plurality of rooms, there has been known a whole building air conditioning system in which at least one air conditioning room is independently provided to control air conditioning in the air conditioning room, an air supply duct that connects the air conditioning room and the rooms is provided, and air in the air conditioning room is individually distributed (for example, PTL 1). 
     In the related art, in this type of air conditioning system, individual setting switches and temperature sensors for measuring room temperatures of the rooms are arranged for the rooms, and air blowing volumes of air distributed from the air conditioning room are controlled based on differences between set target temperatures and the room temperatures measured by the temperature sensors. 
     CITATION LIST 
     Patent Literature 
     PTL 1: Unexamined Japanese Patent Publication No. 2011-127845 
     SUMMARY OF THE INVENTION 
     Since rooms partitioned individually have different sizes of spaces, different energies (air conditioning loads) of air conditioning required to reach the target temperatures are different for the rooms. In each of the rooms, the air conditioning load also varies depending on the presence or absence of solar radiation, the presence of heat load equipment, a time zone when people are present, and a number of people. 
     However, in the air conditioning system in the related art, since the air blowing volumes from the air conditioning room to the rooms are decided for the rooms without considering the air conditioning loads in the rooms, there is a problem that a state such as not being easily cooled, not being easily heated, being excessively cooled, or being excessively heated may occur depending on the air conditioning loads of the rooms. 
     The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioning system and an air-conditioning control program capable of appropriately blowing air in an air conditioning room to rooms in consideration of air conditioning loads of the rooms. 
     In order to achieve an object, an air conditioning system of the present invention includes an air conditioning apparatus that is provided in an air conditioning room communicatively connected with a plurality of rooms, air conveyance fans that are provided to correspond to the plurality of rooms in order to convey air in the air conditioning room to the plurality of rooms, and a control device that calculates a distribution of air volumes of the air conveyed from the air conditioning room to the plurality of rooms based on air conditioning load factors corresponding to the plurality of rooms, and controls the air conveyance fans in accordance with the distribution of the air volumes. 
     An air-conditioning control program of the present invention is executed by a control device that controls operations of air conveyance fans provided so as to correspond to a plurality of rooms in order to convey, to the plurality of rooms, air in an air conditioning room which is communicatively connected with the plurality of rooms and includes an air conditioning apparatus. The air-conditioning control program causes the control device to operate following processes of calculating a distribution of air volumes of air conveyed to the plurality of rooms from the air conditioning room based on air conditioning load factors corresponding to the plurality of rooms, and controlling the air conveyance fans in accordance with the distribution of the air volumes. 
     A storage medium of the present invention stores the above air-conditioning control program. 
     According to the air conditioning system and the air-conditioning control program of the present invention, the distribution of the air volumes of the air conveyed from the air conditioning room to the plurality of rooms is calculated based on the air conditioning load factors set for the rooms, and the air conveyance fans are controlled in accordance with the distribution of the air volumes. Thus, there is an effect that the air in the air conditioning room can be appropriately blown to the rooms in consideration of the air conditioning loads of the rooms. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a connection schematic diagram of an air conditioning system according to an exemplary embodiment of the present invention. 
         FIG.  2    is a schematic functional block diagram of a control device of the air conditioning system. 
         FIG.  3    is a schematic diagram schematically illustrating a relationship between a calculated load factor, a time label, and a room label stored in a load factor storage of the control device. 
         FIG.  4    is a flowchart illustrating air conditioning load factor calculation processing executed by the control device. 
         FIG.  5    is a flowchart illustrating air conditioning control processing executed by the control device. 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The following exemplary embodiment illustrates a preferred specific example of the present invention. Thus, numerical values, shapes, materials, components, arranged positions and connection forms of the components, steps (processes), orders of steps, and the like to be illustrated in the following exemplary embodiment are examples and are not to limit the scope of the present invention. Accordingly, among the components in the following exemplary embodiment, the components that are not recited in the independent claim(s) representing the most superordinate concept are described herein as optional components. In each drawing, substantially the same components are denoted by the same reference marks, and the redundant description will be omitted or simplified. 
     First, a schematic configuration of air conditioning system  20  according to an exemplary embodiment of the present invention will be described with reference to  FIG.  1   .  FIG.  1    is a connection schematic diagram of air conditioning system  20  according to the present exemplary embodiment. 
     Air conditioning system  20  includes outside air introduction fan  4 , a plurality of discharge fans  5   a,    5   b,    5   c,  and  5   d,  a plurality of air conveyance fans  3   a,    3   b,    3   c,  and  3   d,  a plurality of circulation fans  6   a,    6   b,    6   c,  and  6   d,  a plurality of room temperature sensors  11   a,    11   b ,  11   c,  and  11   d , air conditioning room temperature sensor  14 , air conditioner (air conditioning apparatus)  9 , input and output terminal  19 , and control device  10 . 
     Air conditioning system  20  is installed in general residence  1  which is an example of a building. General residence  1  includes at least one air conditioning room  18  independent of rooms  2   a  to  2   d  in addition to a plurality of (four in the present exemplary embodiment) rooms  2   a  to  2   d.  Here, general residence  1  (residence) is a residence provided as a place where residents live a private life, and as a general configuration, the rooms include a living room, a dining room, a bedroom, a private room, a children&#39;s room, and the like. The rooms provided by air conditioning system  20  may include a toilet, a bathroom, a washroom, a dressing room, and the like. 
     Air conditioning room  18  is communicatively connected with rooms  2   a  to  2   d  via ducts  21   a  to  21   d.  Air conditioning room  18  is further communicatively connected with rooms  2   a  to  2   d  via ducts  22   a  to  22   d.  In air conditioning room  18 , outside air is taken into air conditioning room  18  by outside air introduction fan  4  and is mixed with air conveyed from each of rooms  2   a  to  2   d  by circulation fans  6   a  to  6   d.  The air in air conditioning room  18  is air-conditioned by controlling a temperature by air conditioner  9  as the air conditioning apparatus provided in air conditioning room  18 . The air conditioned in air conditioning room  18  is conveyed to rooms  2   a  to  2   d  by air conveyance fans  3   a  to  3   d.    
     Air in each of rooms  2   a  to  2   d  is conveyed to air conditioning room  18  by circulation fans  6   a  to  6   d,  and is discharged as the outside air from the insides of rooms  2   a  to  2   d  to the outside of general residence  1  by discharge fans  5   a  to  5   d . Air conditioning system  20  discharges the outside air from the insides of the rooms by controlling air discharge volumes of discharge fans  5   a  to  5   d,  and takes the outside air into the rooms by controlling an air supply volume of outside air introduction fan  4  by the linkage with the air discharge volumes of discharge fans  5   a  to  5   d.  In this manner, the air conditioning system performs ventilation by a first type ventilation method. The first type ventilation method refers to a method using the fans for both the supply air and the discharge air. 
     Outside air introduction fan  4  is a fan that takes the outside air into the rooms of general residence  1 , and corresponds to an air supply function of an air supply fan or a heat exchange air fan. As described above, the outside air taken in by outside air introduction fan  4  is introduced into air conditioning room  18 . The air supply volume of outside air introduction fan  4  is set in a plurality of levels, and the air discharge volume is set in accordance with the air discharge volumes of discharge fans  5   a  to  5   d.    
     Discharge fans  5   a  to  5   d  are fans that discharge, as the outside air, a part of the air in the corresponding rooms  2   a  to  2   d,  and correspond to discharge functions of a ceiling embedded ventilation fan, a wall mounted ventilation fan, a range hood, and a heat exchange air fan. Discharge fan  5   a  is provided in room  2   a,  discharge fan  5   b  is provided in room  2   b,  discharge fan  5   c  is provided in room  2   c,  and discharge fan  5   d  is provided in room  2   d.    
     Each of discharge fans  5   a  to  5   d  is configured such that the air discharge volume can be set in a plurality of levels. Normally, each of discharge fans  5   a  to  5   d  is controlled so as to have a preset air discharge volume. The air discharge volume is controlled for each of discharge fans  5   a  to  5   d  in accordance with settings by a user and values acquired by various sensors. 
     Air conveyance fans  3   a  to  3   d  are provided in air conditioning room  18  so as to correspond to rooms  2   a  to  2   d.  The air in air conditioning room  18  is conveyed to room  2   a  by air conveyance fan  3   a,  conveyed to room  2   b  by air conveyance fan  3   b,  conveyed to room  2   c  by air conveyance fan  3   c,  and conveyed to room  2   d  by air conveyance fan  3   d.  Air conveyance fans  3   a  to  3   d  may be provided in rooms  2   a  to  2   d,  respectively. Air conveyance fans  3   a  to  3   d  may be provided in ducts  21   a  to  21   d  connecting air conditioning room  18  and rooms  2   a  to  2   d.    
     Each of air conveyance fans  3   a  to  3   d  is driven by a DC motor, and air volume constant control is performed such that air blowing volumes become constant at an air blowing volume set for each of air conveyance fans  3   a  to  3   d . Each of air conveyance fans  3   a  to  3   d  has a maximum air volume of 110 cubic feet per minute (CFM) or 80 CFM depending on the size and purpose of the corresponding room (living room, bedroom, child&#39;s room, and the like). For the air conveyance fan having the maximum air volume of 110 CFM, the air blowing volume can be set in a range of 50 CFM to 110 CFM in increments of 10 CFM. For the air conveyance fan having the maximum air volume of 80 CFM, the air blowing volume can be set in a range of 30 CFM to 80 CFM in increments of 10 CFM. 
     Circulation fan  6   a  is provided in room  2   a,  circulation fan  6   b  is provided in room  2   b,  circulation fan  6   c  is provided in room  2   c,  and circulation fan  6   d  is provided in room  2   d.  A part of the air in each of rooms  2   a  to  2   d  is conveyed to air conditioning room  18  by corresponding circulation fans  6   a  to  6   d.  Instead of circulation fans  6   a  to  6   d,  the air may be returned to air conditioning room  18  via a shared space by pushing out the air in the rooms to the shared space in general residence  1  by a louver window or the like which transmits the air from each of rooms  2   a  to  2   d.    
     Air conditioner  9  corresponds to the air conditioning apparatus of the present invention, and controls air conditioning of air conditioning room  18 . Air conditioner  9  can set, as operation modes, a cooling operation for cooling the air in air conditioning room  18  and a heating operation for heating the air in air conditioning room  18 , and cools or heats the air in air conditioning room  18  such that the temperature of the air in air conditioning room  18  becomes a set target temperature. 
     Room temperature sensor  11   a  is provided in room  2   a,  room temperature sensor  11   b  is provided in room  2   b,  room temperature sensor  11   c  is provided in room  2   c,  and room temperature sensor  11   d  is provided in room  2   d . Room temperature sensors  11   a  to  11   d  are sensors that measure temperatures (room temperatures) of corresponding rooms  2   a  to  2   d  and transmit the measured room temperatures to control device  10 . 
     Air conditioning room temperature sensor  14  is a sensor that is provided in air conditioning room  18 , measures the temperature of the air in air conditioning room  18  (air conditioning room temperature), generates a signal indicating the air conditioning room temperature, and transmits the signal to control device  10 . 
     Control device  10  is a controller that controls entire air conditioning system  20 . For example, control device  10  controls operations of air conditioner  9  provided in air conditioning room  18  and air conveyance fans  3   a  to  3   d  provided corresponding to rooms  2   a  to  2   d.  Control device  10  is connected to be able to communicate with outside air introduction fan  4 , discharge fans  5   a  to  5   d,  air conveyance fans  3   a  to  3   d,  circulation fans  6   a  to  6   d,  room temperature sensors  11   a  to  11   d,  air conditioning room temperature sensor  14 , and air conditioner  9  by wireless communication. 
     Specifically, control device  10  sets the target temperature of air conditioning room  18  based on a target temperature set for each of rooms  2   a  to  2   d  by input and output terminal  19  to be described later. Control device  10  controls air conditioner  9  based on the temperature of air conditioning room  18  measured by air conditioning room temperature sensor  14  such that the temperature and humidity of air conditioning room  18  become the target temperature set for air conditioning room  18 . 
     For each of rooms  2   a  to  2   d,  control device  10  sets an air conditioning load factor of the corresponding room from energy required for air conditioning of the room. Control device  10  calculates a distribution of air volumes blown from air conditioning room  18  to rooms  2   a  to  2   d  based on the set air conditioning load factors of rooms  2   a  to  2   d,  and controls each of air conveyance fans  3   a  to  3   d  in accordance with the distribution of the air volumes. 
     Accordingly, the air conditioned in air conditioning room  18  is appropriately conveyed to each of rooms  2   a  to  2   d  by the air blowing volume corresponding to the air conditioning load factor of each of rooms  2   a  to  2   d . Thus, in each of rooms  2   a  to  2   d,  control is performed so as to achieve the target temperature set in each of rooms  2   a  to  2   d  without causing a state of not being easily cooled, not being easily heated, being excessively cooled, or being excessively heated. 
     The setting of the air conditioning load factor and the control of air conveyance fans  3   a  to  3   d  will be described later with reference to  FIGS.  2  to  5   . 
     Control device  10  controls outside air introduction fan  4  and discharge fans  5   a  to  5   d  by the linkage with each other by, for example, setting the air supply volume of outside air introduction fan  4  so as to have the air volume corresponding to the air discharge volumes of discharge fans  5   a  to  5   d . Accordingly, general residence  1  is ventilated by the first type ventilation method. 
     Here, control device  10  is connected to outside air introduction fan  4 , discharge fans  5   a  to  5   d,  air conveyance fans  3   a  to  3   d,  circulation fans  6   a  to  6   d , room temperature sensors  11   a  to  11   d,  air conditioning room temperature sensor  14 , air conditioning room humidity sensor  15 , and air conditioner  9  by wireless communication, and thus, a complicated wiring work can be unnecessary. However, all these devices, or control device  10  and a part of these devices may be configured to be able to communicate by wired communication. 
     In the present exemplary embodiment, a case where control device  10  is installed as an independent device will be described, but the control device may be incorporated in air conditioner  9  or another device. Control device  10  is not necessarily installed in general residence  1 , and may be implemented by a so-called cloud by an external server. 
     Input and output terminal  19  is connected to be able to communicate with control device  10  by wireless communication, receives an input of information necessary for constructing air conditioning system  20 , and stores the information in control device  10 , or acquires a state of air conditioning system  20  from control device  10  and displays the state. The target temperature for each of rooms  2   a  to  2   d  is also set by the user from input and output terminal  19 . Examples of input and output terminal  19  include a mobile information terminal such as a mobile phone, a smartphone, and a tablet. 
     Input and output terminal  19  is not necessarily connected to control device  10  by wireless communication, and may be connected to be able to communicate with control device  10  by wired communication. In this case, input and output terminal  19  may be implemented by, for example, a remote controller on a wall. In the example illustrated in  FIG.  1   , one input and output terminal  19  is provided, but a plurality of input and output terminals  19  may be provided, and for example, may be provided in rooms  2   a  to  2   d , respectively. 
     Next, functions of control device  10  will be described with reference to  FIG.  2   .  FIG.  2    is a schematic functional block diagram of control device  10 . 
     Control device  10  includes at least air conditioning controller  31 , air conditioning load factor calculator  32 , communication controller  33 , calendar function unit  34 , data storage  35 , and load factor storage  36 . 
     Air conditioning controller  31  controls the operations of air conditioner  9  and air conveyance fans  3   a  to  3   d.  For example, air conditioning controller  31  sets the operation of air conditioner  9  to the cooling operation or the heating operation and sets the target temperature of air conditioning room  18  based on the target temperature or the like set for each of rooms  2   a  to  2   d.  Air conditioning controller  31  calculates the distribution of the air volumes blown from air conditioning room  18  to rooms  2   a  to  2   d  based on the air conditioning load factors set for rooms  2   a  to  2   d,  and controls each of air conveyance fans  3   a  to  3   d  in accordance with the distribution of the air volumes. Details of air conditioning controller  31  will be described later with reference to  FIG.  5   . 
     Air conditioning load factor calculator  32  calculates, for each of rooms  2   a  to  2   d,  an air conditioning load factor of the room for each time zone based on energy required for air conditioning in the corresponding room. In the present exemplary embodiment, a length of one time zone is one hour. That is, from 0:00 to 1:00, from 1:00 to 2:00, from 2:00 to 3:00, . . . , from 22:00 to 23:00, and from 23:00 to 24:00 are the time zones. Air conditioning load factor calculator  32  calculates the air conditioning load factor of each of rooms  2   a  to  2   d  for each time zone. The air conditioning load factor calculated here is stored in load factor storage  36 . Details of air conditioning load factor calculator  32  will be described later with reference to  FIG.  4   . The length of the time zone is not necessarily one hour, and may be randomly assigned, such as two hours or three hours. 
     Communication controller  33  controls communication performed between air conditioning controller  31  and air conveyance fans  3   a  to  3   d,  air conditioner  9 , room temperature sensors  11   a  to  11   d,  and air conditioning room temperature sensor  14 . Air conditioning controller  31  controls the operation of each of air conveyance fans  3   a  to  3   d  by transmitting the air blowing volume for each of air conveyance fans  3   a  to  3   d  set by air conditioning controller  31  to the corresponding air conveyance fan via communication controller  33 . 
     Air conditioning controller  31  controls the operation of air conditioner  9  by transmitting the operation mode (cooling operation or heating operation) of air conditioner  9  and the target temperature of air conditioning room  18  set by air conditioning controller  31  to air conditioner  9  via communication controller  33 . 
     Air conditioning controller  31  periodically acquires the temperatures of rooms  2   a  to  2   d  measured by room temperature sensors  11   a  to  11   d  from room temperature sensors  11   a  to  11   d  provided in rooms  2   a  to  2   d  at predetermined time intervals via communication controller  33 . Air conditioning controller  31  sets the operation mode of air conditioner  9  and decides the air blowing volume of each of air conveyance fans  3   a  to  3   d  based on the acquired temperature of each of rooms  2   a  to  2   d.  Air conditioning controller  31  stores the temperature of the room periodically acquired for each of rooms  2   a  to  2   d  in data storage  35 . 
     Air conditioning controller  31  periodically acquires the measured temperature of air conditioning room  18  from air conditioning room temperature sensor  14  provided in air conditioning room  18  via communication controller  33  at predetermined time intervals. Air conditioning controller  31  stores the periodically acquired temperature of air conditioning room  18  in data storage  35 . 
     Calendar function unit  34  outputs date and time at this time to air conditioning controller  31  and air conditioning load factor calculator  32 , and includes, for example, a real time clock. Air conditioning controller  31  determines the air conditioning load factor of each of rooms  2   a  to  2   d  at this date and time based on the date and time indicated by calendar function unit  34 , and decides the air blowing volume of each of air conveyance fans  3   a  to  3   d.  Air conditioning load factor calculator  32  sets the air conditioning load factor of each of rooms  2   a  to  2   d  for each time zone or season (month) based on the date and time indicated by calendar function unit  34 . 
     Data storage  35  stores information necessary for setting the air conditioning load factor of each of rooms  2   a  to  2   d,  and is written by air conditioning controller  31 . When a predetermined time zone is started, air conditioning controller  31  stores, as an original room temperature, the room temperature of each of rooms  2   a  to  2   d  at this time in data storage  35 . Air conditioning controller  31  stores, in data storage  35 , the passage of time of the room temperature of each of rooms  2   a  to  2   d,  the passage of time of the air blowing volume of each of air conveyance fans  3   a  to  3   d,  and the passage of time of the air conditioning room temperature of air conditioning room  18  in this time zone. Air conditioning load factor calculator  32  sets the air conditioning load factor for each of rooms  2   a  to  2   d  based on the original room temperature of each of rooms  2   a  to  2   d,  the passage of time of the room temperature of each of rooms  2   a  to  2   d,  the passage of time of the air blowing volume of each of air conveyance fans  3   a  to  3   d,  and the passage of time of the air conditioning room temperature of air conditioning room  18  stored in data storage  35 . 
     Load factor storage  36  stores the air conditioning load factor set by air conditioning load factor calculator  32 . Examples of the air conditioning load factor stored in load factor storage  36  include calculated load factor  36   a,  time label  36   b,  room label  36   c,  and season label  36   d.  Calculated load factor  36   a , time label  36   b,  room label  36   c,  and season label  36   d  are stored for each of rooms  2   a  to  2   d.  Details of load factor storage  36  will be described with reference to 
       FIG.  3   .  FIG.  3    is a schematic diagram schematically illustrating a relationship between calculated load factor  36   a,  time label  36   b,  and room label  36   c  stored in load factor storage  36 . 
     Calculated load factor  36   a  is the air conditioning load factor itself calculated for each time zone in a target room. Here, air conditioning load factor R in one time zone is calculated by air conditioning load factor calculator  32  by following Equation (1). 
         R=ΔS×F /( TT−OT )   (1)
 
     Where, TT is a target temperature set in the target room, OT is an air conditioning room temperature of air conditioning room  18 , ΔS is a time from when one time zone is started in the target room to when the temperature reaches target temperature TT set in this room, and F is an air blowing volume set for the air conveyance fan that blows the air in air conditioning room  18  to the target room. These variables are acquired from data storage  35 . 
     From above Equation (1), it can be said that air conditioning load factor R is set based on the amount of energy required for air conditioning in the corresponding room, and the larger the amount of energy required for air conditioning in the room, the larger the air conditioning load factor. 
     As described above, for each of rooms  2   a  to  2   d,  air conditioning load factor R is calculated based on air blowing volume F blown from air conditioning room  18  to the corresponding room within a predetermined time and a temperature change amount of the corresponding room acquired by each of room temperature sensors  11   a  to  11   d.  Thus, air conditioning load factor R can be easily obtained without complicated setting and calculation. 
     In the present exemplary embodiment, as described above, one time zone is set every hour from 0:00 to 1:00, from 1:00 to 2:00, from 2:00 to 3:00, . . . , from 22:00 to 23:00, and from 23:00 to 24:00. In the present exemplary embodiment, air conditioning load factors R for at least five days are stored for each of rooms  2   a  to  2   d  in each time zone, and time labels  36   b  to be described later are calculated. Thus, load factor storage  36  stores, as calculated load factors  36   a,  the air conditioning load factors for a number of rooms×24 time zones×5 days. 
     Time label  36   b  indicates an air conditioning load factor in a predetermined time zone for each of rooms  2   a  to  2   d,  that is, for each of from 0:00 to 1:00, from 1:00 to 2:00, from 2:00 to 3:00, . . . , from 22:00 to 23:00, and from 23:00 to 24:00. That is, time labels  36   b  are stored for a predetermined number of time zones in each room. However, in the present exemplary embodiment, time labels  36   b  for one month (up to 31 days) for calculating season label  36   d  to be described later can be stored. 
     For one room, air conditioning load factor calculator  32  calculates time label  36   b  from 0:00 to 1:00 by averaging calculated load factors  36   a  from 0:00 to 1:00 over the last predetermined number of days (five days in the present exemplary embodiment) calculated for the one room. Time label  36   b  in another time zone is also calculated by averaging calculated load factors  36   a  for the time zone for the last five days calculated for the one room ((A) of  FIG.  3   ). 
     At the time of factory shipment of air conditioning system  20 , predetermined initial values (for example, 1.00) are stored as initial values of time labels  36   b  for all the rooms and time zones. In the first day when air conditioning system  20  is operated for the first time, the air blowing volumes of air conveyance fans  3   a  to  3   d  are set by using the initial values of time labels  36   b.    
     When five days have not passed after air conditioning system  20  is operated for the first time, there are no calculated load factors  36   a  for five days for each of rooms  2   a  to  2   d.  In this case, as time label  36   b  of each time zone, an average value of calculated load factors  36   a  from the first day to the second day is set for each time zone on the second day, an average value of calculated load factors  36   a  from the first day to the third day is set for each time zone on the third day, and an average value of calculated load factors  36   a  from the first day to the fourth day is set for each time zone on the fourth day. 
     As is clear from above Equation (1), calculated load factors  36   a  cannot be obtained when the room temperature does not reach target temperature TT set in the target room or when there is no difference between the target temperature of the room and the air conditioning room temperature in one time zone. In  FIG.  3   , a state in which calculated load factors  36   a  are not obtained is indicated as “-”. 
     In a case where time label  36   b  in one time zone is set, when calculated load factors  36   a  of the one time zone of the day are not obtained, time label  36   b  of the same time zone of the previous day is set as it is ((B) of  FIG.  3   ). 
     When time label  36   b  of one time zone is set by averaging calculated load factors  36   a  for the last five days (or several days), there may be a case where there are calculated load factors  36   a  that are not obtained among calculated load factors  36   a  up to the previous day used for the averaging. In this case, calculated load factors  36   a  obtained in the same time zone up to the previous day with respect to the day on which calculated load factors  36   a  are not obtained are set as calculated load factors  36   a  of the day on which calculated load factors are not obtained as they are, and the average value for the last five days (or several days) is calculated. For calculated load factors  36   a  in  FIG.  3   , a number in parentheses indicates that calculated load factors  36   a  obtained in the same time zone up to the previous day with respect to the day on which calculated load factors  36   a  are not obtained are set as calculated load factors  36   a  of the day on which calculated load factors are not obtained as they are. 
     Air conditioning controller  31  reads out time label  36   b  of each of rooms  2   a  to  2   d  in the time zone from load factor storage  36  from a time output from calendar function unit  34 , and distributes the air blowing volumes of air conveyance fans  3   a  to  3   d.  Since solar radiation to each of rooms  2   a  to  2   d , presence or absence of a person, and the like change depending on the time zone, the air conditioning load factor of each of rooms  2   a  to  2   d  also changes. By using time label  36   b  indicating the air conditioning load factor in each time zone for each of rooms  2   a  to  2   d,  the air conditioned in air conditioning room  18  can be appropriately distributed to each of rooms  2   a  to  2   d  depending on the time zone. As described above, among the air conditioning load factors, time label  36   b  is used as a factor that is a basis of air conditioning control of each of rooms  2   a  to  2   d.    
     Room label  36   c  indicates an average air conditioning load factor in each of rooms  2   a  to  2   d.  That is, room labels  36   c  are stored as many as the number of rooms. For each of rooms  2   a  to  2   d,  air conditioning load factor calculator  32  averages time labels  36   b  set for five last consecutive time zones to this room ((C) of  FIG.  3   ). 
     At the time of factory shipment of air conditioning system  20 , predetermined initial values (for example, 1.00) are stored as the initial values of room labels  36   c  for all the rooms. Immediately after air conditioning system  20  is operated for the first time, the air blowing volumes of air conveyance fans  3   a  to  3   d  are set by using the initial values of room labels  36   c.    
     In a state in which air conditioning system  20  is not operated for five time zones after being operated for the first time, there are no time labels  36   b  for the five time zones for each of rooms  2   a  to  2   d.  In this case, at a point in time when the first time zone is completed, air conditioning load factor calculator  32  sets time label  36   b  of the first time zone as it is as room label  36   c  of the corresponding room. Air conditioning load factor calculator  32  sets, as room labels  36   c  of the corresponding room, an average value of time labels  36   b  in two time zones at a point in time when the second time zone is completed, an average value of time labels  36   b  in three time zones at a point in time when the third time zone is completed, and an average value of time labels  36   b  in four time zones at a point in time when the fourth time zone is completed. 
     Air conditioning controller  31  adjusts the balance of the air blowing volume of air conditioning room  18  with respect to rooms  2   a  to  2   d  by estimating a size of the room space of each of rooms  2   a  to  2   d  based on a size of room label  36   c  of each of rooms  2   a  to  2   d.  That is, when the air blowing volume of the air of air conditioning room  18  with respect to each of rooms  2   a  to  2   d  is decided by using time label  36   b  of each of rooms  2   a  to  2   d,  since time label  36   b  reflects a fluctuation in an air conditioning load due to factors such as solar radiation, the air blowing volume of the air of air conditioning room  18  with respect to each of rooms  2   a  to  2   d  may be set to be larger than necessary with respect to the size of the room space. The size of the room space of each of rooms  2   a  to  2   d  is estimated by the size of room label  36   c  of each of rooms  2   a  to  2   d,  and the balance of the air blowing volume of the air in air conditioning room  18  with respect to rooms  2   a  to  2   d  is adjusted. Thus, it is possible to prevent the air blowing volume of the air in air conditioning room  18  with respect to each of rooms  2   a  to  2   d  from being set to be larger than necessary with respect to the size of the room space. 
     Season label  36   d  indicates an air conditioning load factor in a corresponding month for each of rooms  2   a  to  2   d,  for each month as a predetermined season, that is, for each of January, February, March, . . . , November, and December. That is, season label  36   d  is stored for 12 months for each of rooms  2   a  to  2   d.  When each month is ended, air conditioning load factor calculator  32  calculates, for each of rooms  2   a  to  2   d,  an average value of all time labels  36   b  set in each time zone in the month ended, and sets the average value as season label  36   d  of this month in this room. 
     Season label  36   d  is used to determine a direction of the air conditioning load calculation, for example, when a temperature range toward the cooling operation or the heating operation is different for each season. 
     At the time of factory shipment of air conditioning system  20 , predetermined initial values (for example, 1.00) are stored as the initial values of season labels  36   d  for all the rooms and months. After air conditioning system  20  is operated for the first time, when season label  36   d  of the month in which air conditioning system  20  is operated is not set, the initial value of season label  36   d  is used. 
     Next, air conditioning load factor calculation processing executed by control device  10  will be described with reference to  FIG.  4   .  FIG.  4    is a flowchart illustrating the air conditioning load factor calculation processing. A program for causing control device  10  to execute the air conditioning load factor calculation processing is a part of an air-conditioning control program of the present invention. Control device  10  is caused to execute this program, and thus, control device  10  operates as air conditioning load factor calculator  32 . This program is stored in a nonvolatile memory (not illustrated) provided in control device  10 . 
     The air conditioning load factor calculation processing is processing of calculating, for each of rooms  2   a  to  2   d,  the air conditioning load factor of the corresponding room from energy required for air conditioning of this room. The air conditioning load factor calculation processing is executed at timings at which a predetermined time zone is switched (1:00, 2:00, 3:00, . . . , 23:00, and 24:00) based on the date and time output from calendar function unit  34 . 
     When the air conditioning load factor calculation processing is executed, control device  10  first sets one room to be calculated from among rooms  2   a  to  2   d  for which the calculation processing is not executed yet (S 1 ). 
     Subsequently, control device  10  acquires a temperature OT in air conditioning room  18  in the last 1 hour (last time zone) from data storage  35  (S 2 ). Subsequently, control device  10  acquires target temperature TT set for the room to be calculated by the processing of S 1  (S 3 ). Control device  10  acquires, from data storage  35 , air blowing volume F set for the last 1 hour with respect to the air conveyance fan corresponding to the room to be calculated (S 4 ). In the room to be calculated, control device  10  acquires time ΔS until the temperature reaches set target temperature TT in the last 1 hour from information stored in data storage  35  (S 5 ). 
     Control device  10  calculates air conditioning load factor R in the time zone of the last 1 hour by using above Equation (1), and stores air conditioning load factor R in load factor storage  36  as calculated load factor  36   a  of the calculated day in the time zone of the room to be calculated (S 6 ). 
     Subsequently, control device  10  calculates time label  36   b  in the time zone of the last 1 hour by averaging calculated load factors  36   a  in the time zone of the last 5 days including the current day, and stores the time label as time label  36   b  in load factor storage  36  (S 7 ). The method of setting time label  36   b  when there are no calculated load factors  36   a  for the time zone for the last 5 days including the current day, such as after factory shipment or when calculated load factors  36   a  are not obtained is as described above. 
     After the processing of S 7 , control device  10  calculates room label  36   c  of the room to be calculated by averaging time labels  36   b  of the last five time zones including time label  36   b  of the time zone calculated in the processing of S 7 , and stores room label  36   c  in load factor storage  36  (S 8 ). The method of setting room label  36   c  when there are no time labels  36   b  of the last five time zones, such as after factory shipment, is as described above. 
     Subsequently, control device  10  determines whether or not the execution of the current air conditioning load factor calculation processing is started based on the fact that 24:00 at the end of the month has arrived from the date and time output from calendar function unit  34  (S 9 ). As a result, a case where it is determined that the execution of the current air conditioning load factor calculation processing is started based on the fact that 24:00 at the end of the month has arrived (S 9 : Yes) means that the month including the end of the month is ended. Thus, in this case, control device  10  calculates an average value of all time labels  36   b  set in each time zone in the month ended, and stores the average value in load factor storage  36  as season label  36   d  of the month of the room (S 10 ). 
     After the processing of S 10  or when it is determined that the execution of the current air conditioning load factor calculation processing is not started based on the fact that 24:00 at the end of the month has arrived as a result of the processing of S 9  (S 9 : No), control device  10  executes the processing of S 11 . In the processing of S 11 , it is determined whether or not the air conditioning load factors are calculated for all rooms  2   a  to  2   d  in the current air conditioning load factor calculation processing (S 11 ). As a result, when there are rooms  2   a  to  2   d  for which the air conditioning load factors are not calculated yet (S 11 : No), control device  10  returns to the processing of S 1  and calculates the air conditioning load factors for rooms  2   a  to  2   d  for which the air conditioning load factors are not calculated yet. On the other hand, when the air conditioning load factors are calculated for all rooms  2   a  to  2   d  (S 11 : Yes), control device  10  ends the air conditioning load factor calculation processing. 
     Next, air conditioning control processing executed by control device  10  will be described with reference to  FIG.  5   .  FIG.  5    is a flowchart illustrating the air conditioning control processing. A program for causing control device  10  to execute this air conditioning control processing is a part of the air-conditioning control program of the present invention, and control device  10  operates as air conditioning controller  31  by causing control device  10  to execute this program. This program is stored in a nonvolatile memory (not illustrated) provided in control device  10 . 
     The air conditioning control processing is processing of controlling the entire air conditioning in general residence  1  by controlling the operations of air conditioner  9  and air conveyance fans  3   a  to  3   d.  The air conditioning control processing is executed at timings at which a predetermined time zone is switched (timings of 1:00, 2:00, 3:00, . . . , 23:00, and 24:00) based on the date and time output from calendar function unit  34 . 
     When the air conditioning control processing is executed, control device  10  first acquires target temperature TT of each of rooms  2   a  to  2   d  set by input and output terminal  19  (S 21 ). Subsequently, control device  10  acquires the current room temperatures in rooms  2   a  to  2   d  from room temperature sensors  11   a  to  11   d  (S 22 ). 
     Control device  10  sets the operation mode of air conditioner  9  to either the cooling operation or the heating operation based on a difference between target temperature TT of each of rooms  2   a  to  2   d  acquired by the tasks of processing of S 21  and S 22  and the current room temperature (S 23 ). 
     Subsequently, control device  10  determines the current time zone from the date and time output from calendar function unit  34 , and predicts a temporal fluctuation in the air conditioning load in each of rooms  2   a  to  2   d  from time labels  36   b  of each of rooms  2   a  to  2   d  in the current time zone and the time zones before and after the current time zone (S 24 ). Control device  10  sets the target temperature of air conditioning room  18  based on the target temperature of each of rooms  2   a  to  2   d  acquired by the processing of S 21  and the magnitude of the fluctuation in the air conditioning load in each of rooms  2   a  to  2   d  predicted by the processing of S 24  (S 25 ). 
     In the processing of S 25 , the target temperature of air conditioning room  18  is set based on the magnitude of the fluctuation in the air conditioning load in each of rooms  2   a  to  2   d  predicted by the processing of S 24 . For example, as the fluctuation in the air conditioning load becomes larger, the target temperature of air conditioning room  18  is set to become lower than the target temperature set for each of rooms  2   a  to  2   d  during the cooling operation, and the target temperature of air conditioning room  18  is set to become higher than the target temperature set for each of rooms  2   a  to  2   d  during the heating operation. Accordingly, since the necessary air conditioning energy can be supplied in advance to the room in which the fluctuation in the air conditioning load is large, it is possible to prevent the necessary air conditioning energy from suddenly increasing as the air conditioning load increases thereafter. Thus, it is possible to prevent the air blowing volumes of air conveyance fans  3   a  to  3   d  from increasing, and it is possible to achieve an energy-saving operation and a silent operation. 
     The operation mode of air conditioner  9  set by the processing of S 23  and the target temperature of air conditioning room  18  set by the processing of S 25  are instructed to air conditioner  9  via communication controller  33 . 
     In subsequent processing of S 26 , the distribution of the air volumes blown from air conditioning room  18  to rooms  2   a  to  2   d  is calculated in accordance with the difference between target temperature TT of each of rooms  2   a  to  2   d  and the current room temperature, time label  36   b  of the current time zone set for each of rooms  2   a  to  2   d,  room label  36   c  set for each of rooms  2   a  to  2   d , and season label  36   d  of the current month set for each of rooms  2   a  to  2   d.    
     Specifically, control device  10  first distributes the air volumes blown from air conditioning room  18  to each of rooms  2   a  to  2   d  from the difference between target temperature TT of each of rooms  2   a  to  2   d  and the current room temperature and time label  36   b  of the current time zone set for each of rooms  2   a  to  2   d.  At this time, the larger time label  36   b  is (the larger the air conditioning load is), the larger the air blowing volume from air conditioning room  18  is set. More specifically, the air volume of each room in the certain time zone may be decided based on a ratio of time label  36   b  of each room to the total of all the time labels. 
     Control device  10  estimates the size of the room space of each of rooms  2   a  to  2   d  based on room label  36   c  set for each of rooms  2   a  to  2   d,  and adjusts the balance of the air blowing volume of air conditioning room  18  with respect to rooms  2   a  to  2   d.  Accordingly, as described above, it is possible to prevent the air blowing volume of the air from air conditioning room  18  to each of rooms  2   a  to  2   d  from being set larger than necessary with respect to the size of the room space. 
     Control device  10  further adjusts the air blowing volume from air conditioning room  18  to each of rooms  2   a  to  2   d  in accordance with season label  36   d  of the current month set for each of rooms  2   a  to  2   d  in consideration of the energy required for the air conditioning of each of rooms  2   a  to  2   d  in the month. 
     Accordingly, it is possible to supply the air conditioning energy corresponding to the air conditioning load factor that fluctuates depending on the season to each of rooms  2   a  to  2   d.    
     When the distribution of the air volumes blown from air conditioning room  18  to rooms  2   a  to  2   d  in the processing of S 26 , control device  10  controls air conveyance fans  3   a  to  3   d  via communication controller  33  in accordance with the distribution of the air blowing volumes. 
     In the present exemplary embodiment, when time label  36   b  is set in the air conditioning load factor calculation processing, there are no calculated load factors  36   a  for the last 5 days, and an initial value or an average value of only calculated load factors  36   a  that are present is set as time label  36   b,  the processing of S 26  is executed by using set time label  36   b.  On the other hand, the air blowing volumes from air conditioning system  20  to rooms  2   a  to  2   d  may be set to a predetermined air blowing volume without using time label  36   b  or the like in the processing of S 26  by using 5 days from when air conditioning room  18  is operated for the first time to when time label  36   b  is set by averaging calculated load factors  36   a  in the last 5 days as a learning period of time label  36   b.    
     In the present exemplary embodiment, the air volume to each of rooms  2   a  to  2   d  is decided based on time label  36   b,  room label  36   c,  and season label  36   d . However, the air volume to each of rooms  2   a  to  2   d  is not limited thereto, and may be decided based on any one of calculated load factor  36   a,  time label  36   b , room label  36   c,  and season label  36   d.    
     Subsequently, control device  10  stores information necessary for setting the air conditioning load factor of each of rooms  2   a  to  2   d  in data storage  35  for each of rooms  2   a  to  2   d  (S 27 ). 
     Specifically, in the processing of S 27 , the temperatures in rooms  2   a  to  2   d  at a point in time when the air conditioning control processing is started are stored in data storage  35 . In the processing of S 27 , the passage of time of the temperatures in rooms  2   a  to  2   d  measured by room temperature sensors  11   a  to  11   d  is stored in data storage  35 . 
     In the processing of S 27 , the passage of time of the air blowing volume (that is, the air blowing volume of each of air conveyance fans  3   a  to  3   d  provided corresponding to each of rooms  2   a  to  2   d ) of the air in air conditioning room  18  supplied to each of rooms  2   a  to  2   d  is stored in data storage  35 . In the processing of S 27 , the passage of time of the air conditioning room temperature measured by air conditioning room temperature sensor  14  is stored in data storage  35 . 
     Based on the information stored in data storage  35 , the air conditioning load factors of each of rooms  2   a  to  2   d  are calculated in the air conditioning load factor calculation processing executed at a timing when the time zone is ended. 
     Subsequently, control device  10  controls the air conveyance fan corresponding to the room so as to stop blowing the air in air conditioning room  18  to the room in which the temperature in the room reaches the set target temperature (S 28 ). 
     Thereafter, control device  10  reads out, from load factor storage  36 , subsequent time label  36   b  in the room where the blowing of the air in air conditioning room  18  is stopped, and determines whether or not a change in time label  36   b  is large (S 29 ). Control device  10  controls the air conveyance fan corresponding to the room so as to perform a weak air blowing operation on the room where the change in subsequent time label  36   b  is large (S 30 ). 
     As described above, the energy necessary for the air conditioning is supplied to the room in advance by performing the weak air blowing operation on the room where the change of time label  36   b  is large in advance, and thus, the energy necessary for the air conditioning can be prevented from suddenly increasing as the air conditioning load increases. Thus, since it is possible to prevent the air blowing volumes of air conveyance fans  3   a  to  3   d  from increasing, it is possible to achieve the energy-saving operation and the silent operation. 
     After the processing of S 30 , control device  10  ends the air conditioning control processing. 
     As described above, in air conditioning system  20  according to the present exemplary embodiment, the air conditioning load factors (time label  36   b  or the like) are calculated for each of the plurality of rooms  2   a  to  2   d.  The distribution of the air volumes blown from air conditioning room  18  to rooms  2   a  to  2   d  is calculated based on the air conditioning load factors. Air conveyance fans  3   a  to  3   d  are controlled in accordance with the distribution of the air volumes. Thus, the air in air conditioning room  18  can be appropriately blown to each of the rooms in consideration of the air conditioning load of each of rooms  2   a  to  2   d.    
     Although the present invention has been described above based on the exemplary embodiment, the present invention is not limited to the above exemplary embodiment at all, and it can be easily inferred that various modifications and variations can be made without departing from the gist of the present invention. For example, each exemplary embodiment may be modified by adding a part or a plurality of parts of the configuration of another exemplary embodiment to this exemplary embodiment or replacing the part or the plurality of parts of the configuration of this exemplary embodiment. The numerical values mentioned in the above exemplary embodiment are examples, and it is naturally possible to adopt other numerical values. 
     Control device  10  may be provided outside a house, for example, in a cloud server operated by a management company that manages the control of air conditioning system  20  so as to be able to communicate with the air conveyance fan or the like. In such a case, control device  10  is mainly achieved by a combination of a central processing unit (CPU) of the cloud server and software executed on the CPU. 
     The above-described software can be distributed independently by being stored in a storage medium or distributed via a network. 
     INDUSTRIAL APPLICABILITY 
     The air conditioning system according to the present invention is applicable to a detached residence or a composite dwelling residence such as an apartment. When the present invention is applied to a composite dwelling residence, one system corresponds to a residence unit, and each residence is not one room. 
     REFERENCE MARKS IN THE DRAWINGS 
       1  general residence 
       2   a  room 
       2   b  room 
       2   c  room 
       2   d  room 
       3   a  air conveyance fan 
       3   b  air conveyance fan 
       3   c  air conveyance fan 
       3   d  air conveyance fan 
       4  outside air introduction fan 
       5   a  discharge fan 
       5   b  discharge fan 
       5   c  discharge fan 
       5   d  discharge fan 
       6   a  circulation fan 
       6   b  circulation fan 
       6   c  circulation fan 
       6   d  circulation fan 
       9  air conditioner 
       10  control device 
       11   a  room temperature sensor 
       11   b  room temperature sensor 
       11   c  room temperature sensor 
       11   d  room temperature sensor 
       14  air conditioning room temperature sensor 
       18  air conditioning room 
       19  input and output terminal 
       31  air conditioning controller 
       32  air conditioning load factor calculator 
       33  communication controller 
       34  calendar function unit 
       35  data storage 
       36  load factor storage 
       36   a  calculated load factor 
       36   b  time label 
       36   c  room label 
       36   d  season label