JP2018109459A - Controller for air conditioning system, and air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the capacity of a heat source machine usable in the full thereof range irrespective of the number of the dampers of an air conditioning system.SOLUTION: A controller 30 comprises a processing part 31 and a controlling part 32. The controlling part 31 determines the amount of heat to be supplied per unit time to each of a plurality of air conditioning areas in a building from a heat source machine 11 that generates cool air or warm air. A damper 14 controls the flow rate of cool air or warm air to be blown out of each of a plurality of air supply ducts into the plurality of air conditioning areas. The processing part 31 determines the opening of each of the plurality of dampers 14 according to the amount of heat to be supplied per unit time into each of the plurality of air conditioning areas, and determines the volume of cool air or warm air to be supplied from the heat source machine 11 for the evaluated value corresponding to the mean value of each of the openings of the plurality of dampers 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a control device for an air conditioning system and an air conditioning system. More specifically, the present invention relates to a control device for an air conditioning system that collectively performs air conditioning in a plurality of air conditioning regions in a building, and an air conditioning system including the control device.

  Patent Document 1 describes a configuration in which cool air or warm air from an indoor unit is distributed to a plurality of rooms, and the supply of cool air or warm air to the outlet is turned on or off by a damper. The outdoor unit includes a variable capacity compressor, and the capacity of the variable capacity compressor is determined according to the total number of outlets corresponding to the open dampers. In Patent Document 1, a capacity ratio table in which the total number of outlets and the capacity of a variable capacity compressor are associated with each other is provided.

JP 2013-200089 A

  The damper provided in the air conditioner described in Patent Document 1 only switches on or off the supply of cool air or warm air to the room. That is, in the technique described in Patent Document 1, when the number of dampers is changed, the capacity ratio table must also be changed.

  In the configuration described in Patent Document 1, when the number of dampers is changed, the capacity of the heat source machine cannot be used in the full range without changing the design or the like.

  An object of the present invention is to provide a control device for an air conditioning system and an air conditioning system that can use the capability of a heat source device in a full range regardless of the number of dampers.

  The control device for an air conditioning system according to an aspect of the present invention includes a processing unit and a control unit. The processing unit determines an amount of heat to be supplied per unit time from a heat source device that generates cold air or warm air to each of a plurality of air conditioning regions of the building. The control unit controls a distribution device that distributes the cold air or the warm air generated by the heat source device to the plurality of air-conditioning regions. The distribution device includes an air supply duct and a plurality of dampers. The air supply duct is branched into a plurality of systems so as to distribute the cold air or the warm air from the heat source device to each of the plurality of air conditioning regions. The plurality of dampers adjust a flow rate of the cool air or the warm air blown out from each of the plurality of systems of the air supply duct to the plurality of air conditioning regions. The processing unit has at least two functions described below. The first function is a function of determining the opening of each of the plurality of dampers according to the amount of heat supplied per unit time to each of the plurality of air conditioning regions. The second function is a function of determining the amount of cool air or warm air supplied by the heat source unit with respect to an evaluation value corresponding to an average value of the opening degrees of the plurality of dampers.

  An air conditioning system according to an aspect of the present invention includes a heat source device, a distribution device, a plurality of temperature sensors, and a control device for the air conditioning system. The heat source unit generates cool air or warm air supplied to the building. The distribution device distributes the cold air or the warm air generated by the heat source unit to a plurality of air conditioning regions in the building. The plurality of temperature sensors measure the temperature of each of the plurality of air conditioning regions. The control device is configured to acquire temperatures measured by the plurality of temperature sensors as current temperatures.

  In the configuration of the present invention, the opening degree of the plurality of dampers is determined according to the amount of heat supplied per unit time to each of the plurality of air conditioning regions, and the evaluation value corresponding to the average value of the opening degree of each of the plurality of dampers On the other hand, the amount of cool air or warm air supplied by the heat source unit is determined. Therefore, it is possible to use the capacity of the heat source machine in the full range regardless of the number of dampers.

FIG. 1 is a schematic configuration diagram showing the overall configuration of the embodiment. FIG. 2 is a block diagram illustrating a control device according to the embodiment. FIG. 3 is a diagram illustrating an example of a screen for setting the user desired temperature in the embodiment. FIG. 4 is a flowchart showing the overall operation of the control device in the embodiment. FIG. 5 is a flowchart illustrating an operation of determining a control table for the control device according to the embodiment.

  In embodiment described below, the case where a building is a detached house is assumed and the case where an air conditioning system is a whole building air conditioning system is assumed. This entire building air conditioning system is configured to supply almost the entire building as cold air or warm air generated by a heat source machine. The entire building air conditioning system is configured to perform air conditioning and ventilation.

  An air conditioning system 10 illustrated in FIG. 1 is installed in a building 20 and includes a heat source device 11, an air filter 12, and two transport fans 13. In addition, the air conditioning system 10 illustrated in FIG. 1 includes three or more dampers 14 and three or more outlets 15 for one transport fan 13. The number of dampers 14 and outlets 15 is desirably 5 or more and 7 or less. Since the dampers 14 and the air outlets 15 correspond one to one, the number of the dampers 14 and the air outlets 15 is the same. The damper 14 here is realized by a VAV unit (VAV: Variable Air Volume). The number of transport fans 13 and the number of dampers 14 and outlets 15 are appropriately determined according to the capacity of the heat source unit 11, the configuration and scale of the building 20, and the like. Hereinafter, in order to simplify the description, a case where there are five dampers 14 and five outlets 15 for one transport fan 13 will be described as an example.

  In addition, the air conditioning system 10 includes an air supply duct 16 that sends cool air or warm air from the heat source device 11 to the air outlet 15, and an outside air duct 171 that introduces outside air into the heat source device 11. The air inside the building 20 is also introduced into the heat source unit 11. In FIG. 1, a path for introducing the air inside the building 20 to the heat source unit 11 is denoted by reference numeral 172. This path 172 schematically represents the flow of air, and includes locations where air flows, such as door gaps and ventilation openings inside the building 20. The path 172 may include a reflux duct.

  The air sent out by the heat source unit 11 includes cold air cooled by the heat source unit 11 and warm air heated by the heat source unit 11 in accordance with the operation state of the heat source unit 11. Further, the air conditioning system 10 shown in FIG. 1 includes a control device 30 and a plurality of temperature sensors 18. Here, the heat source device 11, the air filter 12, and the two transport fans 13 are housed in a single casing 101 installed in the building 20 and are unitized. Therefore, a path (indicated by a broken line in FIG. 1) from the heat source device 11 through the air filter 12 to the two transport fans 13 is formed inside the housing 101.

  The air conditioning system 10 includes two transport fans 13 and ten dampers 14 in order to distribute the cold air or warm air generated by the heat source device 11 to the ten air outlets 15. The air sent out by the transport fan 13 is sent to the air outlet 15 through the air supply duct 16. That is, the two transport fans 13, the ten dampers 14, and the air supply duct 16 constitute a distribution device 102 that distributes the cold air or the warm air generated by the heat source device 11 to the ten air outlets 15. The proportion of the cool air or warm air generated by the heat source device 11 to be distributed to the ten air outlets 15 is determined by the air volume of each of the two transport fans 13 and the opening of each of the ten dampers 14. That is, when the control device 30 controls the distribution device 102, the ratio of the distribution of the cold air or the warm air generated by the heat source device 11 to the ten outlets 15 is determined. The amount of heat supplied to each of the plurality of air conditioning regions 21 per unit time is determined by the temperature and flow rate of the air supplied from the air outlet 15 to the air conditioning region 21.

  The air-conditioning area 21 here is a space area virtually determined so as to correspond one-to-one with the air outlet 15. When cold air or warm air is supplied from a plurality of air outlets 15 to a single room 23 as an air-conditioned space that is the target of air conditioning, a plurality of air-conditioning regions 21 exist in the single room 23. The air-conditioned space is not limited to the room 23 and may be a corridor or a staircase. In the air conditioning system 10 illustrated in FIG. 1, a case where two air conditioning regions 21 exist in one room 23 is illustrated. The broken line shown in the room 23 is not a partition of the air-conditioned area 21 by the real space, but is a line temporarily set to indicate that there are two air-conditioned areas 21.

  The control device 30 acquires the temperature measured by each of the plurality of temperature sensors 18 as a current temperature every predetermined time, controls the heat source unit 11 and the distribution device 102 based on the current temperature, and controls the 10 outlets 15. Adjust the amount of heat distribution per unit time. Each of the plurality of temperature sensors 18 is preferably housed in a case having a vent so as to measure the temperature without being affected by radiant heat.

  The building 20 includes a plurality of air conditioning areas 21 inside. The air-conditioning area 21 is a space to be air-conditioned. Each of the plurality of air-conditioning areas 21 generally corresponds to the room 23 of the building 20 on a one-to-one basis. However, a plurality of air-conditioning areas 21 may exist in a single room 23, and a single air-conditioning area 21 may straddle a plurality of rooms 23. The air-conditioning area 21 is not limited to the room 23 and may be a hallway or a staircase. The air outlets 15 are respectively arranged in the plurality of air conditioning regions 21. That is, air is supplied from the air outlet 15 to each of the plurality of air-conditioning regions 21.

  The temperature sensor 18 and the room 23 (which may be a corridor or a staircase), which is an air-conditioned space, basically correspond one to one, and the temperature sensor 18 measures the temperature of the room 23. Therefore, when a plurality of air-conditioning areas 21 exist in a single room 23, one temperature sensor 18 is arranged in the room 23. In the air conditioning system 10 shown in FIG. 1, an example is shown in which one temperature sensor 18 is disposed in a single room 23 having two air conditioning regions 21. Therefore, the air conditioning system 10 illustrated in FIG. 1 includes nine temperature sensors 18 for ten outlets 15. When a plurality of air conditioning areas 21 exist in a single room 23, the temperature measured by one temperature sensor 18 disposed in the room 23 is shared by the plurality of air conditioning areas 21. That is, the air-conditioning region 21 has a one-to-one correspondence with the damper 14, but when the room 23 has a one-to-many correspondence with the damper 14, the opening degree of the plurality of dampers 14 is determined by the temperature measured by one temperature sensor 18. However, when a plurality of air-conditioning areas 21 exist in a single room 23, two or more temperature sensors 18 may be arranged.

  The place where the temperature sensor 18 is arranged is determined so that the air blown out from the outlet 15 does not directly hit the temperature sensor 18. The position of the temperature sensor 18 is a wall surface surrounding the air-conditioning area 21 and is determined to be, for example, 110 [cm] or more and 120 [cm] or less from the floor. The position of the temperature sensor 18 can be changed as appropriate.

  In the room 23 where the blow-through is formed and the dimension from the floor to the ceiling is large, the plurality of outlets 15 may be arranged apart from each other in the vertical direction. In such a room 23, a plurality of air-conditioning regions 21 are formed in a single room 23 arranged vertically. In the room 23 in which the atrium is formed, the ceiling on the second floor is often the ceiling of the room 23 without the ceiling on the first floor. When the room 23 in which the atrium is formed includes the two air-conditioning areas 21 arranged vertically, the temperature sensor 18 is disposed in each of the two air-conditioning areas 21. One temperature sensor 18 is arranged at a position having the above-mentioned height from the floor on the first floor, and the other temperature sensor 18 is arranged at a position above the height from the height corresponding to the floor on the second floor. The The position of the temperature sensor 18 is merely an example, and can be changed as appropriate.

  The heat source unit 11 is a heat pump type air conditioner including one indoor unit 111 and one outdoor unit 112, and air from the indoor unit 111 is supplied to the air conditioning region 21 through the air supply duct 16. Moreover, the air taken in by the indoor unit 111 is outdoor air taken in from the underfloor 22 of the building 20 through the outside air duct 171 and indoor air collected from the inside of the building 20 through the path 172. The outside air duct 171 is connected to a ventilation fan 19 that takes in air under the floor 22.

  The heat source unit 11 performs a cooling operation in which cool air is sent out from the indoor unit 111 in summer, and performs a heating operation in which warm air is sent out from the indoor unit 111 in winter. Switching between the cooling operation and the heating operation of the heat source unit 11 is performed in an intermediate period such as spring or autumn. The difference between the cooling operation and the heating operation is whether the set temperature of the heat source device 11 is used as an upper limit value or a lower limit value. The heat source unit 11 operates so that the temperature of the cool air sent out from the indoor unit 111 during the cooling operation does not exceed the set temperature of the heat source unit 11 that is the upper limit value, and the warm air sent out from the indoor unit 111 during the heating operation Is operated so as not to fall below the set temperature of the heat source unit 11 which is the lower limit value. In the following description, the amount of heat at the time of heating operation means the amount of heat of warm air, and the amount of heat at the time of cooling operation means the amount of heat of cold air.

  Air from the indoor unit 111 is sent to the transport fan 13 through the air filter 12. The air filter 12 is preferably a HEPA filter (HEPA: High Efficiency Particulate Air). If the air filter 12 is a HEPA filter, it is possible to remove fine particulate matter. Here, dust, insects, and the like, which are relatively large in size, are introduced before air is introduced into the air filter 12 by a filter disposed at one or more places in a path including the ventilation fan 19, the outside air duct 171, and the indoor unit 111. Removed. Therefore, clogging of the air filter 12 is suppressed.

  In this air conditioning system 10, the air supply duct 16 includes two branch ducts 161 into which the air sent out by the two transport fans 13 is introduced. That is, the air sent out from the indoor unit 111 and passed through the air filter 12 and then sent to the two transport fans 13 is introduced into the branch duct 161 that is different for each transport fan 13. Each of the two transport fans 13 accelerates air from the indoor unit 111. In this air conditioning system 10, each of the two branch ducts 161 is further branched into five end ducts 162. That is, air from the indoor unit 111 is introduced into the ten end ducts 162.

  A damper 14 is disposed in each of the ten system end ducts 162. The damper 14 can be adjusted in opening degree, and changes the flow rate of air passing through the end duct 162 by changing the opening degree. An outlet 15 is connected to the end of the end duct 162. Therefore, the air from the indoor unit 111 is sent to the damper 14 through the transport fan 13, and after the flow rate is adjusted by the damper 14, the air is blown out to the air-conditioning region 21 through the air outlet 15.

  The air conditioning system 10 described above constantly ventilates the building 20. Therefore, in principle, the transport fan 13 always operates. Further, the air conditioning system 10 stops the heat source device 11 when the cooling operation or the heating operation is not required. That is, the outside air introduced into the indoor unit 111 from the outside air duct 171 is sent to the air conditioning region 21 by the transport fan 13 for ventilation even when the heat source unit 11 does not cool or heat. However, it is possible to stop the conveyance fan 13 as necessary for maintenance or the like. Moreover, when performing ventilation with a ventilation fan etc., the conveyance fan 13 may be stopped.

  Below, the control apparatus 30 is explained in full detail. As illustrated in FIG. 2, the control device 30 includes a processing unit 31 and a control unit 32. The processing unit 31 determines a distribution amount of the amount of heat supplied to each of the plurality of air conditioning regions 21. The control unit 32 controls the heat source device 11, the transport fan 13, and the damper 14. In addition, the control device 30 includes an interface unit 33 for inputting and outputting information to and from the operation display device 40.

  The operation display device 40 includes a touch panel including a display device and a touch pad, and functions as a user interface (GUI: Graphic User Interface). That is, the control device 30 outputs information to the display device included in the operation display device 40 and receives information input from the touch pad included in the operation display device 40. Various screens are displayed on the operation display device 40 as necessary. The operation display device 40 may not be dedicated but may be a smartphone, a tablet computer, a personal computer, or the like. Further, instead of the operation display device 40, a display device and an operation device may be provided separately.

  Examples of the screen displayed on the operation display device 40 include a screen for associating the damper 14 with the room 23 and a screen for associating the temperature sensor 18 with each of the plurality of rooms 23 of the building 20. When the correspondence between the room 23 and the damper 14 is determined, and the correspondence between the room 23 and the temperature sensor 18 is determined, the room 23, the damper 14, and the temperature sensor 18 are connected. Moreover, since the blower outlet 15 has one-to-one correspondence with the damper 14, the room 23 and the blower outlet 15 are connected when the correspondence between the room 23 and the damper 14 is determined.

  By the way, one of the screens displayed on the operation display device 40 is a screen P1 for determining a user desired temperature in the room 23 (which may be a hallway or a staircase) as shown in FIG. The screen P1 has a plurality of button groups B1, B2, and B3 that receive user desired temperatures of the plurality of rooms 23, respectively. On the screen P1, a field F1 indicating a room name is provided. In the example shown in FIG. 3, it is possible to determine user desired temperatures for the three rooms 23 on one screen P1. When the number of rooms 23 included in the building 20 exceeds the number of rooms 23 that can be displayed on one screen P1, a button for switching to another screen is displayed on the screen P1. When this button is operated, the screen is switched to another screen, and the user desired temperature in the other room 23 can be set.

  In the example shown in FIG. 3, the button group B1 includes three buttons B10, B11, and B12 arranged vertically. The center button B10 corresponds to a reference temperature set for one building 20 as a whole. The reference temperature can be set by the user. In the air conditioning system 10, an initial value of the reference temperature may be set at the time of factory shipment. When this button B10 is operated, the user desired temperature is set to the reference temperature. When the upper button B11 is operated, the user desired temperature is set higher than the reference temperature, and when the lower button B12 is operated, the user desired temperature is set lower than the reference temperature. When the button B11 or the button B12 is operated, the control device 30 changes the user desired temperature at predetermined temperature increments for each operation. The selected temperature is displayed numerically in association with the button group B1.

  As an example, it is assumed that the reference temperature is 26.0 [° C.], the predetermined temperature is 0.5 [° C.], and the user desired temperature is the reference temperature. In this case, when the button B11 is operated once, the user desired temperature is set to 26.5 [° C.], and when the button B12 is operated once, the user desired temperature is set to 25.5 [° C.]. If the user desired temperature is the reference temperature and the button B11 is operated twice, the user desired temperature is set to 27.0 ° C. Regardless of the set user desired temperature, when the button B10 is operated, the user desired temperature returns to the reference temperature of 26.0 [° C.]. The numerical value shown here is an example when the air-conditioning system 10 is in the period of the cooling operation, and is not intended to be limited to these numerical values.

  Here, the configuration and operation of the button group B1 have been described. The button groups B2 and B3 have the same configuration and operation. In addition, the configuration in which the user desired temperature of the three rooms 23 can be set on one screen is illustrated, but the number of the rooms 23 on which the user desired temperature is set on one screen can be changed by design. Furthermore, the configurations and operations of the button groups B1, B2, and B3 are not limited to the configurations described above. For example, each of the plurality of button groups B1, B2, and B3 may include five buttons. In this configuration, in each of the plurality of button groups B1, B2, and B3, a button corresponding to the selected user desired temperature may be set to a display state different from the remaining buttons. Different display states are realized by at least one element such as a button size, a button color, and a mark added to the button.

  When the user desired temperature is determined for each of the plurality of rooms 23 using the screen P <b> 1, the control device 30 stores the user desired temperature in the storage unit 34. The storage unit 34 stores user desired temperatures for each of the plurality of rooms 23.

  The processing unit 31 of the control device 30 illustrated in FIG. 2 includes an acquisition unit 310 that communicates with each of the plurality of temperature sensors 18. In the air conditioning system 10, the acquisition unit 310 is configured to perform wired communication with the temperature sensor 18 and periodically inquire the plurality of temperature sensors 18 about the current temperature. That is, the acquisition unit 310 acquires the current temperature from each temperature sensor 18 by polling the plurality of temperature sensors 18. The period at which the acquisition unit 310 inquires each of the plurality of temperature sensors 18 about the current temperature is set in a range of 1 minute to 15 minutes, preferably in a range of 5 minutes to 10 minutes. This period is determined by the measurement accuracy of the temperature sensor 18, the speed at which the temperature of the room 23 changes, and the like.

  The current temperature acquired by the acquisition unit 310 from the temperature sensor 18 is a temperature measured by the temperature sensor 18 when the acquisition unit 310 makes an inquiry to the temperature sensor 18. However, the average value of the temperature in a predetermined period set near the time when the temperature sensor 18 receives an inquiry from the acquisition unit 310 may be used. This predetermined period is either before or after the time when the temperature sensor 18 receives an inquiry from the acquisition unit 310, or straddles the time. This predetermined period is set in a range of, for example, 10 seconds to 3 minutes, preferably in a range of 30 seconds to 1 minute.

  In addition to the acquisition unit 310, the processing unit 31 of the control device 30 includes a first calculation unit 311, a second calculation unit 312, and a determination unit 313. Here, for explanation, positive integer value i representing the order is associated with the time series of the current temperature acquired by the acquisition unit 310, and identification information for distinguishing the plurality of rooms 23 from each other is represented by j. The identification information j is represented by a positive integer value, for example.

  The first calculation unit 311 determines a target temperature for each of the plurality of rooms 23 based on the user desired temperature stored in the storage unit 34. Although the target temperature may be different from the user desired temperature depending on the operation of the control device 30, a case where the target temperature is the same as the user desired temperature will be described here. The first calculation unit 311 receives the current temperature acquired by the acquisition unit 310 and calculates a temperature difference between the current temperature acquired every predetermined time and the current temperature. For the room 23 whose identification information is j, when the current temperature acquired by the acquisition unit 310 is represented by θj1 (i) and the target temperature is represented by θj2, the first calculation unit 311 represents the temperature difference Δθj (i) as Δθj. (I) = [theta] j1 (i)-[theta] j2 is calculated and output with a positive or negative sign. The first calculator 311 obtains the temperature difference Δθj (i) for each of the plurality of rooms 23. The temperature difference Δθj (i) obtained by the first calculation unit 311 is temporarily stored in the storage unit 34 in association with the identification information j of the room 23.

  The storage unit 34 stores at least two temperature differences Δθj (i) and Δθj (i−1) for each room 23. The two temperature differences Δθj (i) and Δθj (i−1) stored in the storage unit 34 are updated when the acquisition unit 310 acquires the current temperature θj1 (i). That is, the storage unit 34 stores the latest temperature difference Δθj (i) and the previous temperature difference Δθj (i−1). The latest temperature difference Δθj (i) is a temperature difference obtained in a period from when the acquisition unit 310 acquires the current temperature θj1 (i) until the next current temperature θj1 (i + 1) is acquired. The previous temperature difference Δθj (i−1) is a period after the acquisition unit 310 acquires the previous current temperature θj1 (i−1) before the acquisition unit 310 acquires the current temperature θj1 (i). This is the temperature difference obtained by

  The second calculator 312 calculates the temperature change Vj (i) every time the acquisition unit 310 acquires the current temperature θj1 (i). The temperature change Vj (i) is a difference between the current temperatures θj1 (i) and θj1 (i−1) for two times acquired by the acquisition unit 310. That is, the second calculation unit 312 obtains the temperature change Vj (i) per unit time by calculation of Vj (i) = θj1 (i−1) −θj1 (i). The obtained temperature change Vj (i) represents a temperature change with respect to time. Since the first calculation unit 311 obtains the temperature difference Δθj (i), the second calculation unit 312 obtains the temperature change Vj (i) by calculating the current temperatures θj1 (i) and θj1 (i−1). Instead of the difference, a difference between the two temperature differences Δθj (i) and Δθj (i−1) may be obtained. If the target temperature θj2 does not change during the period in which the acquisition unit 310 acquires the current temperatures θj1 (i) and θj1 (i-1) for two times, the current temperatures θj1 (i) and θj1 (i-1) for two times are not changed. And the difference between the two temperature differences Δθj (i) and Δθj (i−1) are the same value.

  For each of the plurality of rooms 23, the determination unit 313 uses the i-th temperature difference Δθj (i) obtained by the first calculation unit 311 and the temperature change Vj (i) obtained by the second calculation unit 312. A distribution amount of heat supplied from the heat source unit 11 to each of the plurality of rooms 23 is determined. The amount of heat distributed to each of the plurality of rooms 23 is determined by the opening degree of each of the plurality of dampers 14, the air volume of each of the two transport fans 13, and the amount of heat generated by the heat source unit 11 per unit time. That is, the determination unit 313 determines the opening degree of each of the plurality of dampers 14 based on the temperature difference Δθj (i) and the temperature change Vj (i) of each of the plurality of rooms 23, and then determines each of the two transport fans 13. And the amount of heat generated by the heat source unit 11 per unit time. Here, when there are a plurality of outlets 15 in a single room 23, the amount of heat supplied to the room 23 from each of the plurality of outlets 15 corresponding to the single room 23 is determined to be an equal amount of heat in principle. It is done.

  A specific operation example of the determination unit 313 will be described below. Below, after explaining the function which determines the opening degree of the damper 14 about the case where the one air outlet 15 exists in one room 23, based on the opening degree of all the dampers 14 arrange | positioned in the building 20, two units | sets are demonstrated. The function of determining the air volume of the transport fan 13 and the heat generated by the heat source unit 11 per unit time will be described. The function for determining the opening degree of the damper 14 will be described with the identification information j of the room 23 omitted. Therefore, in the following description, the current temperature is represented by θ1 (i), the target temperature is θ2, and the temperature difference is represented by Δθ (i) (= θ1 (i) −θ2)). Although the target temperature θ2 may be changed, in order to simplify the description, the case where the target temperature θ2 is not changed will be described. Here, since one air outlet 15 corresponds to one room 23, the room 23 can be read as the air-conditioned area 21.

  The determination unit 313 includes a control table 314 having a format as shown in Table 1 in which a temperature difference and an opening degree are associated with each other. In the control table 314, the temperature difference is divided into a plurality of sections, and the opening degree of the damper 14 corresponds to each of the plurality of sections. Table 1 shows a control table 314 during a period in which the air conditioning system 10 is in the cooling operation in the assumed standard heat load room 23.

  In the cooling operation, when the current temperature exceeds the target temperature, the cool air from the heat source device 11 must be supplied to the room 23 and the current temperature must be maintained near the target temperature. In the cooling operation, in the air conditioning region 21, the current temperature exceeding the target temperature indicates that the cooling is insufficient. Further, in the air conditioning region 21, the current temperature matching the target temperature indicates that the cooling is sufficient, and that the current temperature is below the target temperature indicates that the cooling is excessive.

  When the cooling is insufficient, it is necessary to increase the amount of cooling heat supplied to the room 23 per unit time as the current temperature is higher than the target temperature. In other words, if the cooling is insufficient, it can be said that the greater the current temperature exceeds the target temperature and the greater the difference between the current temperature and the target temperature, the greater the degree of cooling shortage.

  The first calculation unit 311 obtains a temperature difference obtained by subtracting the target temperature from the current temperature with a positive / negative sign. Therefore, if the temperature difference obtained by the first calculation unit 311 is positive, it indicates that the cooling is insufficient, and the larger the temperature difference is, the greater the degree of cooling is. In the control table 314 of Table 1, there are provided more sections where the temperature difference is positive than sections where the temperature difference is negative.

  As an example, the control table 314 defines five sections with a temperature difference of 1 [° C.]. Since this control table 314 is used during the cooling operation period, in this control table 314, a relatively large opening corresponds to the section where the temperature difference is positive and is relatively large. Yes. That is, in the control table 314, when the cooling is insufficient, the opening degree of the damper 14 is set so that the greater the degree of the shortage, the greater the amount of cold heat supplied to the room 23 per unit time. .

  In the control table 314 shown in Table 1, even if the temperature difference is negative, the damper is provided so as to supply an amount of heat that does not increase the temperature of the air-conditioning region 21 until the current temperature drops by 1 [° C.] from the target temperature. The opening degree of 14 dampers 14 is set (25 [%]). Further, in the control table 314 shown in Table 1, when the temperature difference exceeds 2 [° C.], the opening degree of the damper 14 is determined to be maximum (100 [%]). Further, in the control table 314 shown in Table 1, when the current temperature falls below 1 [° C.] with respect to the target temperature, it is determined that the opening degree of the damper 14 is minimized (5 [% ]). The minimum opening of the damper 14 is determined so that a minimum degree of ventilation can be secured in the room 23. However, the damper 14 may be closed if the room 23 can be ventilated even if the transport fan 13 is stopped. In this case, the opening degree of the damper 14 is 0 [%].

  By the way, the temperature difference can be rephrased as “deficiency”. The degree of deficiency noted in Table 1 is represented by five levels of integer values from “−1” to “3” corresponding to the temperature difference. When the deficiency is 0, the air conditioning is satisfied, when the deficiency is positive, the air conditioning is deficient, and when the deficiency is negative, the air conditioning is excessive. The shortage of air conditioning is represented by an integer value in three stages. The larger the numerical value, the greater the degree of air conditioning shortage.

  The determination unit 313 uses the control table 314 having the format shown in Table 2 during the period when the air conditioning system 10 is in the heating operation. In the heating operation, when the current temperature is lower than the target temperature, the warm air from the heat source unit 11 must be supplied to the room 23 and the current temperature must be maintained near the target temperature. In the heating operation, the fact that the current temperature is lower than the target temperature in the air conditioning region 21 indicates that the heating is insufficient. In Table 2, more intervals are provided than intervals where the temperature difference is negative. Further, the degree of deficiency is associated with a larger value as the temperature difference is negative and the absolute value is larger.

  The determination unit 313 receives the temperature difference Δθ (i) from the first calculation unit 311 every time the acquisition unit 310 acquires the current temperature θ1 (i), and determines the section to which the temperature difference Δθ (i) belongs in the control table 314. Ask from. The determination unit 313 determines the opening degree of the damper 14 according to the section to which the temperature difference Δθ (i) belongs. The opening degree of the damper 14 set in the control table 314 of Tables 1 and 2 is a default value of the opening degree with respect to the temperature difference in the air conditioning system 10. That is, the control table 314 shown in Table 1 and Table 2 is a control table 314 corresponding to the air conditioning region 21 assumed as a standard. Note that the deficiencies in Tables 1 and 2 are not essential.

  Here, the temperature difference Δθ (i) is a value obtained by subtracting the target temperature from the current temperature. Therefore, as can be seen by comparing Table 1 and Table 2, depending on whether the air conditioning system 10 is in the cooling operation or the heating operation. The sign of the temperature difference Δθ (i) indicating a state where air conditioning is insufficient is inverted. In the following description, the case where the air conditioning system 10 is in the cooling operation will be described as an example. Therefore, when the air conditioning system 10 is in the heating operation, it is necessary to reverse the sign of the temperature difference Δθ (i) with the opposite sign.

  By the way, when the cooling is insufficient, the time until the current temperature reaches the target temperature is shortened by increasing the amount of heat per unit time supplied to the room 23 as the temperature difference increases. Moreover, if the thermal load is the same for the plurality of rooms 23 and the amount of heat per unit time supplied to the rooms 23 is the same, the temperature changes in the rooms 23 are considered to be substantially equal. However, the thermal load of each of the plurality of rooms 23 in the building 20 differs depending on factors such as the volume of the room 23, the amount of heat flowing into or out of the room 23, the amount of heat flowing out of the room 23, and the amount of heat generated in the room 23. For this reason, if the amount of heat supplied per unit time is the same for a plurality of rooms 23, variations occur in the speed at which the current temperature changes.

  Now, it is assumed that the target temperatures are set to be the same for a plurality of rooms 23 having different heat loads, and the temperatures at the time of starting air conditioning are equal. In this case, if the amount of heat supplied per unit time to the plurality of rooms 23 is equal, the time until the current temperature reaches the target temperature varies. That is, in the room 23 with a relatively large heat load, the time until the current temperature reaches the target temperature may be long. In the room 23 with a relatively small heat load, the current temperature exceeds the target temperature. Cooling may be excessive. In addition, when the current temperature reaches the target temperature and the amount of heat supplied to the room 23 per unit time does not match the heat load of the room 23, there is a possibility that the current temperature varies greatly.

  In short, when the heat load is different in each of the plurality of rooms 23 of the building 20, the amount of heat supplied to the room 23 per unit time is determined based only on the temperature difference between the current temperature and the target temperature. 23, there is a possibility that the current temperature change characteristic varies. In other words, if the heat loads of the plurality of rooms 23 are different, the amount of heat supplied to the room 23 per unit time may not be in an appropriate range, and may be too small or excessive.

  In the air conditioning system 10, the determination unit 313 determines the opening degree of the damper 14 not only based on the temperature difference but also using a temperature change with respect to time. That is, the determination unit 313 includes a correction unit 315 that corrects the opening set in the control table 314. The correction unit 315 corrects the opening degree of the damper 14 so that the temperature change with respect to time is relatively large when the degree of air conditioning shortage is relatively large and the temperature change with time is relatively small. In addition, the correction unit 315 is configured such that when the air conditioning is sufficient or excessive, or when the degree of air conditioning shortage is relatively small and the temperature change with respect to time is relatively large, the temperature change is relatively small. 14 is corrected. Here, the magnitude of the temperature change with respect to time represents the speed of the temperature change in the room 23.

  The condition of whether or not to correct the opening degree of the damper 14 is determined by combining a temperature difference and a temperature change with respect to time. The determination unit 313 evaluates whether the air conditioning is insufficient by comparing the temperature difference with the first threshold value. Further, the determination unit 313 evaluates whether or not the amount of heat per unit time supplied to the room 23 is too small by comparing the temperature change with respect to time with the second threshold value. When the temperature change with respect to time is smaller than the second threshold, the amount of heat supplied to the room 23 per unit time is too small with respect to the heat load of the room 23.

  The determination unit 313 also defines a third threshold value to be compared with the temperature difference and a fourth threshold value to be compared with the temperature change. The third threshold value is used to evaluate whether or not the air conditioning is substantially satisfied by being compared with the temperature difference. The fourth threshold value is used to evaluate whether the amount of heat per unit time supplied to the room 23 is excessive. When the temperature change with respect to time is larger than the fourth threshold, it indicates that the amount of heat supplied to the room 23 per unit time is excessive with respect to the heat load of the room 23.

  Incidentally, the correction unit 315 selects one temperature selected from the latest temperature difference Δθ (i) and the previous temperature difference Δθ (i−1) as the temperature difference compared with the first threshold value and the third threshold value. Use temperature difference. Since the storage unit 34 stores the two temperature differences Δθ (i) and Δθ (i−1), either one may be used. However, in the following, the previous temperature difference Δθ (i−1) is determined. The case of using will be described as an example. That is, the determination unit 313 determines the opening degree of the damper 14 based on the latest temperature difference Δθ (i), and compares the previous temperature difference Δθ (i−1) with the first threshold value and the third threshold value. . In the following description, the first threshold is TH1, the second threshold is TH2, the third threshold is TH3, and the fourth threshold is TH4.

  The correction unit 315 corrects the opening degree of the damper 14 so that the temperature change V (i) increases when the conditions of Δθ (i−1)> TH1 and V (i) <TH2 are satisfied. The condition here is that the temperature difference Δθ (i−1) is larger than the first threshold value TH1, so that the degree of air conditioning shortage is relatively large, and since the temperature change is smaller than the second threshold value TH2, the unit is the room 23. This means that the amount of heat supplied per hour is too small. That is, the room 23 in which this condition is satisfied represents that the heat load is larger than the heat load of the room 23 assumed as a standard, and the amount of heat supplied per unit time is too small. Therefore, the correction unit 315 increases the opening degree of the damper 14 corresponding to the room 23 and corrects the control table 314 so that the amount of heat supplied per unit time increases. The control device 30 can provide the control table 314 corresponding to the heat load of the room 23 by performing such correction.

  Moreover, the correction | amendment part 315 correct | amends the opening degree of the damper 14 so that temperature change V (i) may decrease, when the conditions (DELTA) (theta) (i-1) <TH3 and V (i)> TH4 are satisfy | filled. The condition here is that the temperature difference Δθ (i−1) is smaller than the third threshold value TH3, indicating that the air conditioning is substantially satisfied or excessive, and the temperature change is larger than the fourth threshold value TH4, so that the room 23 This means that the amount of heat supplied per unit time is excessive. The state where the air conditioning is substantially satisfied includes a state where the temperature difference between the current temperature and the target temperature is close to 0 [° C.] even when the air conditioning is insufficient, and a state where the air conditioning is satisfied. That is, the room 23 in which this condition is satisfied indicates that the heat load is smaller than the heat load of the room 23 assumed as a standard, and the amount of heat supplied per unit time is excessive. Therefore, the correction unit 315 corrects the control table 314 so that the opening degree of the damper 14 corresponding to the room 23 is reduced. By performing such correction, the control device 30 reduces the possibility that the temperature of the room 23 varies greatly in the vicinity of the target temperature θ2.

  The first threshold value TH1 is used to evaluate that the difference between the current temperature θ1 (i−1) and the target temperature θ2 is relatively large on the air conditioning shortage side. Therefore, the first threshold value TH1 is a relatively large value, and is set to 1 [° C.], for example. The second threshold value TH2 is selected, for example, from the range of 0 [° C.] to 1 [° C.], preferably from the range of 0.2 [° C.] to 0.5 [° C.]. Set to [° C]. On the other hand, the third threshold value TH3 is used to evaluate that the difference between the current temperature θ1 (i−1) and the target temperature θ2 is relatively small on the side where the air conditioning is satisfied or excessive or insufficient. Therefore, the third threshold value TH3 is a relatively small value, and is set to 0.5 [° C.], for example. For example, the fourth threshold value TH4 is selected from the range of 0.2 [° C.] to 1 [° C.], preferably from the range of 0.3 [° C.] to 0.7 [° C.]. 5 [° C.] is set.

  A method for correcting the control table 314 will be specifically described below. The correction unit 315 uses the control table 314 corrected as shown in Table 3 when correcting the opening degree of the damper 14 to be relatively large.

  Here, since it is assumed that the air conditioning system 10 is in cooling operation, the control table 314 shown in Table 3 is created by correcting the control table 314 shown in Table 1. That is, when the temperature difference Δθ (i) is 1 [° C.] or more and less than 2 [° C.], the opening degree of the damper 14 is changed from 70 [%] to 100 [%], and the temperature difference Δθ (i) is 0 [0]. [° C.] or more and less than 1 [° C.], the opening degree of the damper 14 is changed from 40 [%] to 70 [%]. Further, in the control table 314 of Table 3, when the temperature difference Δθ (i) is −1 [° C.] or more and less than 0 [° C.], the opening degree of the damper 14 is 25 [%] with respect to the control table 314 of Table 1. ] To 40 [%].

  Here, since the upper limit of the opening degree of the damper 14 is 100%, when the temperature difference Δθ (i) is 2 ° C. or more, the opening degree of the damper 14 is also in the control table 314 of Table 3. 100% is maintained. Here, since the air conditioning system 10 always performs ventilation, even when the temperature difference Δθ (i) is less than −1 [° C.], the damper 14 is not closed, and the damper 14 has an opening of 5 [%]. ] Is maintained.

  When the control table 314 is corrected as shown in Table 3 for any one of the plurality of rooms 23 in the building 20, the determination unit 313 performs the corrected control table 314 for the room 23. Is used to determine the opening of the damper 14. Further, even when the control is performed using the corrected control table 314, the temperature difference Δθ (i−1) is still larger than the first threshold value TH1, and the temperature change V (i) is smaller than the second threshold value TH2. There is. In this case, the correction unit 315 corrects the control table 314 for the room 23 so that the opening degree of the damper 14 is further increased. Tables 4 and 5 show examples of the control table 314 after correction.

  Here, the air conditioning system 10 needs to be designed according to the volume of the room 23 and the like so that the opening degree of the damper 14 does not become 100 [%] when the current temperature is the target temperature. . In addition, the correction unit 315 desirably limits the upper limit of the opening degree of the damper 14. For example, when the opening of the damper 14 is increased with respect to the control table 314 shown in Table 1, the correction unit 315 corrects the control table 314 in Table 3 in one step and the control table 314 in Table 4 in two steps. to correct. And it is desirable for the correction | amendment part 315 to restrict | limit an upper limit, when increasing the opening degree of the damper 14. FIG. The upper limit for correcting the opening degree of the damper 14 is preferably about 1 to 3 steps with respect to the default value.

  On the other hand, the correction unit 315 uses the control table 314 corrected as shown in Table 6 when correcting the opening degree of the damper 14 to be relatively small.

  The control table 314 shown in Table 6 is corrected so as to make the opening degree of the damper 14 relatively smaller than the control table 314 shown in Table 1. That is, when the temperature difference Δθ (i) is 1 [° C.] or more and less than 2 [° C.], the opening degree of the damper 14 is changed from 70 [%] to 40 [%], and the temperature difference Δθ (i) is 0. In the case of 5 [° C.] or more and less than 1 [° C.], the opening degree of the damper 14 is changed from 40 [%] to 25 [%]. Further, in the control table 314 of Table 4, when the temperature difference Δθ (i) is not less than −1 [° C.] and less than 0.5 [° C.], the opening degree of the damper 14 is 25 with respect to the control table 314 of Table 1. [%] Has been changed to 5 [%]. When the correction unit 315 corrects the damper 14 so that the opening degree of the damper 14 is decreased, the opening degree of the damper 14 can be corrected in a plurality of stages, as in the case where the opening degree of the damper 14 is increased. In addition, the correction unit 315 desirably limits the lower limit of the opening degree of the damper 14.

  Here, when the temperature difference Δθ (i) is less than −1 [° C.], the air-conditioning system 10 constantly ventilates, so that the opening degree of the damper 14 is 5 [like the control table 314 shown in Table 3]. %] Is maintained. When the temperature difference Δθ (i) is 2 [° C.] or more, the opening degree of the damper 14 is maintained at 100 [%].

  The correction unit 315 is not the temperature difference Δθ (i) between the current temperature θ1 (i) acquired by the acquisition unit 310 and the target temperature θ2, but the current temperature θ1 (i−1) and the target temperature θ2 of the previous time. The temperature difference Δθ (i−1) is compared with the first threshold value TH1 and the third threshold value TH3. On the other hand, the correction unit 315 may compare the latest temperature difference Δθ (i) with the first threshold value TH1 and the third threshold value TH3.

  Table 3, Table 4, Table 5, and Table 6 show the corrected control table 314 when the air conditioning system 10 is in the cooling operation. On the other hand, when the air conditioning system 10 is in the heating operation, the correction unit 315 corrects the control table 314 shown in Table 2. The opening degree of the damper 14 is corrected in the same way as in Table 3, Table 4, Table 5, and Table 6 with respect to Table 1. Moreover, although the air conditioning system 10 mentioned above uses the control table 314 which matched the temperature difference and the opening degree of the damper 14, if it replaces with a temperature difference and a deficiency is used, Table 3, Table 4, Table 5 will be used. Table 6 can also be used when the air conditioning system 10 is in the heating operation. The numerical values in the control table 314 described above are values used for explaining the operation, and are appropriately changed depending on the design.

  In the above-described operation, the sign of the temperature difference is inverted depending on whether the air conditioning system 10 is in the cooling operation or the heating operation. On the other hand, when the first calculation unit 311 interchanges two terms of the current temperature and the target temperature when obtaining the temperature difference according to the cooling operation or the heating operation, regardless of whether the cooling operation or the heating operation is performed, It is possible to match the sign of the temperature difference with the degree of lack of air conditioning. That is, the first calculation unit 311 employs a value obtained by subtracting the target temperature from the current temperature during the cooling operation as a temperature difference, and a value obtained by subtracting the current temperature from the target temperature during the heating operation as the temperature difference. You may be comprised so that it may employ | adopt. In this case, the determination unit 313 does not need to use different control tables 314 for the cooling operation and the heating operation, and the control tables as shown in Table 3, Table 4, Table 5, and Table 6 for both the cooling operation and the heating operation. 314 can be shared. The temperature change per unit time is the value obtained by subtracting the latest current temperature from the latest current temperature during the cooling operation, and subtracting the latest current temperature from the previous current temperature during the heating operation. May be used. In this case, when the correction unit 315 compares the temperature change with the second threshold value TH2 and the fourth threshold value TH4, it is not necessary to switch the magnitude relationship between the cooling operation and the heating operation, and the above-described magnitude relationship is referred to as the cooling operation. It can be shared with both heating operation.

  Incidentally, the amount of heat supplied per unit time to each of the plurality of rooms 23 is the amount of heat generated by the heat source unit 11 per unit time, the air volume of each of the two transport fans 13, and the opening of each of the ten dampers 14. It depends on the degree. When the air volume of each of the two transport fans 13 and the opening degree of each of the ten dampers 14 are determined, the volume of air supplied per unit time to each of the ten air-conditioning regions 21 is determined. That is, the heat energy generated by the heat source unit 11 per unit time corresponds to the ratio of the volume of air supplied to each of the ten air-conditioning regions 21 per unit time under ideal conditions where there is no heat loss. It is distributed to 10 air conditioning areas 21. The amount of heat energy generated by the heat source unit 11 per unit time is equal to the total amount of heat energy supplied to all the rooms 23 in the building 20 under ideal conditions where there is no heat loss.

  In the above-described operation, when the acquisition unit 310 acquires the current temperature of each of the plurality of rooms 23, the determination unit 313 obtains the opening degree of the damper 14 corresponding to each of the plurality of rooms 23. The determination unit 313 determines the air volume of each of the two transport fans 13 after determining the opening of the damper 14 in order to determine the amount of heat per unit time distributed to each of the plurality of rooms 23. The air volumes of the two transport fans 13 can be selected from a plurality of stages, respectively. In this air conditioning system 10, the air volumes of the two transport fans 13 are selected from four stages, respectively.

  In this air conditioning system 10, five dampers 14 correspond to one transport fan 13, so the determination unit 313 uses the five dampers 14 corresponding to the transport fan 13 to change the air volume of one transport fan 13. It is determined based on the opening degree. The air volume of the transport fan 13 is associated with the opening degree of the damper 14 in advance. The determining unit 313 determines the air volume of the transport fan 13 after determining the opening degree of each of the five dampers 14 corresponding to one transport fan 13.

  Below, the operation | movement which the control apparatus 30 determines the air volume of the conveyance fan 13 is demonstrated. In order to determine the air volume of the transport fan 13 based on the opening degree of the damper 14, the determination unit 313 has a score table 316 as shown in Table 7 in which the opening degree of the damper 14 is associated with a score, A fan air volume table 317 as shown in Table 8 in which the air volumes are associated is provided. In the fan air volume table 317, the air volume of the transport fan 13 is associated with each of a plurality of sections into which the points are divided. The air volume in the fan air volume table 317 means the volume per time. The determining unit 313 obtains a score corresponding to the opening degree of each of the ten dampers 14 by referring to the score table 316 and refers to the fan air volume table 317 to determine the air volume of each of the two transport fans 13. Determine.

  Specifically, the determination unit 313 obtains a score corresponding to the opening degree of each of the five dampers 14 corresponding to one transport fan 13 from the score table 316, and obtains an average value (average score) of the scores. Thereafter, the air volume of the transport fan 13 is obtained from the fan air volume table 317. It can be said that the average score obtained by the determining unit 313 is an evaluation value corresponding to the average value of the opening degree of each of the five dampers 14. Since the ratio between the opening degree and the score of the damper 14 in the score table 316 is not constant, the average point does not necessarily correspond to the average value of the opening degree, but the score increases monotonously with respect to the opening degree of the damper 14. Therefore, it can be said that the average score as the evaluation value corresponds to the average value of the opening.

  The score in the fan air volume table 317 shown in Table 8 is the average score of the five dampers 14. In the score table 316 shown in Table 7, the maximum value of the score is 5 points, and the minimum value of the score is 1 point, so if the sum of the scores of the five dampers 14 is 5 or more and 25 or less points. However, the average score is 1 or more and 5 or less. Therefore, the determination unit 313 can determine the air volume of the transport fan 13 using the fan air volume table shown in Table 8 regardless of the number of dampers 14 associated with the transport fan 13. In Table 8, since it is assumed that the number of dampers 14 is changed depending on the size of the building 20 or the like, an average value of points corresponding to the opening degree of the dampers 14 is used as an evaluation value. However, when the number of dampers 14 is not changed, the evaluation value may be a total of points corresponding to the opening degree of the dampers 14 (total points). That is, if there is no change in the number of dampers 14, the product of the average point and the number of dampers 14 is a total point, so the total point can be handled in the same way as the average point. Further, the evaluation value may be obtained directly from the opening degree of the damper 14 instead of the score corresponding to the opening degree of the damper 14.

  In the fan air volume table 317 shown in Table 8, the conveying fan 13 can select the air volume from four levels. The number of stages of the air flow rate of the transport fan 13 is an example for explanation, and is appropriately determined depending on the design. In addition, the value of the air flow corresponding to the section divided by the points in Table 8 is also appropriately determined by design or the like. Note that there are 10 types of sums of the airflows of the two transport fans 13 because, if the airflows of the two transport fans 13 are simply combined, they are calculated by overlapping combinations that allow for duplication and select two from four. It is. On the other hand, if the difference in the air volume is constant between two adjacent stages of the fan air volume table 317, there are seven types of sum of the air volumes of the two transport fans 13, and the heat source unit 11 with respect to the air volume of the transport fans 13. It is easy to adapt the air volume. However, it is not essential to keep the air volume difference between two adjacent steps constant.

  The determining unit 313 determines the air volume of the two transport fans 13 based on the opening degree of the ten dampers 14, and then determines the air volume of the heat source unit 11. The air volume of the transport fan 13 and the air volume of the heat source unit 11 are associated in advance. The set temperature of the heat source device 11 is set to a temperature lower than the lowest temperature among the target temperatures of the plurality of rooms 23 if the air conditioning system 10 is in cooling operation, and a plurality of temperatures are set if the air conditioning system 10 is in heating operation. The temperature is set to be higher than the highest temperature among the target temperatures of the room 23. For example, in the heating operation, the set temperature of the heat source device 11 is set to a value obtained by adding an appropriate temperature to the highest temperature among the target temperatures of the plurality of rooms 23. The temperature added to the maximum temperature is selected from the range of 1 [° C.] or more and less than 7 [° C.], and is set to 4 [° C.] as an example. In the case of cooling operation, a similar temperature is subtracted from the above-described minimum temperature. When the set temperature of the heat source unit 11 is determined, the amount of heat that the heat source unit 11 supplies per unit time is adjusted by the air volume. The determination unit 313 determines the air volume of the heat source device 11 so as to be close to the sum of the air volumes of the two transport fans 13.

  The control device 30 described above is realized as a main hardware configuration of a device including a processor that executes a program. The device including the processor may be a micro processing unit (MPU) in which a semiconductor memory is separately provided, or a micro controller that is housed in a single package together with the semiconductor memory. The control device 30 preferably includes at least a RAM (Random Access Memory) as a memory, and at least one of a ROM (Read-Only Memory) and an EEPROM (Electrically Erasable Programmable Read-Only Memory).

  In addition to being provided in a state written in a ROM, the program may be provided by a computer-readable recording medium that is a recording medium such as an optical recording disk or a recording medium including a flash memory. The program may be provided through a telecommunication line such as the Internet or a mobile communication network. The program provided by the recording medium or the telecommunication line is preferably stored in a rewritable nonvolatile memory (for example, EEPROM).

  An example of the operation of the control device 30 when the air conditioning system 10 shown in FIG. 1 is assumed will be described together in FIGS. 4 and 5. The air conditioning system 10 includes one heat source device 11, two transport fans 13, ten dampers 14, and nine temperature sensors 18 disposed in each of nine rooms 23. The control device 30 periodically acquires the current temperature from each of the nine temperature sensors 18 at regular intervals. Moreover, the following description assumes the case where the air conditioning system 10 is a cooling operation.

  As shown in FIG. 4, the control device 30 determines a control table 314 for controlling the opening degree of the damper 14 according to the temperature difference and the temperature change (S10). As an example, the temperature difference here is the previous temperature difference Δθ (i−1), but the latest temperature difference Δθ (i) may be used. The control device 30 individually determines the control table 314 for each of the ten dampers 14. Thereafter, the determination unit 313 of the control device 30 determines the opening degree of the damper 14 according to the temperature difference for each of the ten dampers 14 using the control table 314 determined in step S10 (S11). The temperature difference here is the latest temperature difference Δθ (i) as an example, but it may be the previous temperature difference Δθ (i−1).

  Next, in step S <b> 12, the determination unit 313 determines the air volume of each of the two transport fans 13 based on the opening degree of each of the five dampers 14 corresponding to each of the two transport fans 13. When the air volume of each of the two transport fans 13 is determined, the determining unit 313 determines the air volume of the heat source device 11 (S13). When the opening of the ten dampers 14, the air volume of the two transport fans 13, and the air volume of the heat source device 11 are determined, the control unit 32 of the control device 30 determines the heat source device 11, the transport fan 13, and the damper 14. (S14).

  FIG. 5 shows a specific procedure of step S10. That is, when the acquisition unit 310 acquires the current temperature θ1 (i) of the air conditioning region 21 corresponding to one damper 14 (S101), the first calculation unit 311 determines the current temperature θ1 (i) and the target temperature of the air conditioning region 21. A temperature difference Δθ (i) with θ2 is calculated (S102). The storage unit 34 stores the latest temperature difference Δθ (i) calculated by the first calculation unit 311 and the previous temperature difference Δθ (i−1). Here, an example in which the latest temperature difference Δθ (i) is used to determine the opening degree of the damper 14 and the previous temperature difference Δθ (i−1) is used to determine the control table 314 will be described. The following operation is an example when air conditioning is insufficient.

  The control device 30 for the air conditioning region 21 corresponding to any one of the dampers 14 until the acquisition unit 310 acquires the previous current temperature θ1 (i−1) until the current current temperature θ1 (i) is acquired. It is determined whether or not the target temperature θ2 has been changed during the period (S103). When the target temperature θ2 is changed for the air-conditioning region 21 corresponding to one of the dampers 14 (S103: Y), the acquisition unit 310 acquires the previous current temperature θ (i−1) for the opening degree of the damper 14. It is determined using the control table 314 used at the time (S107). That is, when the current temperature θ1 (i) is acquired, the control table 314 is corrected for the air-conditioning region 21 in which the target temperature θ2 has been changed since the time when the current temperature θ1 (i−1) one time before was acquired. do not do.

  On the other hand, if the target temperature θ2 is not changed for the air-conditioning region 21 corresponding to the damper 14 (S103: N), the second calculation unit 312 calculates the temperature change V (i) for the air-conditioning region 21 corresponding to the damper 14. Obtained (S104). The latest temperature difference Δθ (i) and the previous temperature difference Δθ (i−1) stored in the storage unit 34 and the temperature change V (i) obtained by the second calculation unit 312 are determined by the determination unit. 313. The determination unit 313 evaluates the temperature difference Δθ (i−1) and the temperature change V (i) using the first threshold value TH1 and the second threshold value TH2 (S105). That is, the determination unit 313 compares the temperature difference Δθ (i−1) with the first threshold value TH1 and compares the temperature change V (i) with the second threshold value TH2. Evaluate whether or not. When correction of the control table 314 is necessary (S105: correction is required), the opening degree of the damper 14 is determined by adopting the corrected control table 314 as shown in Table 3, Table 4, Table 5, and Table 6 ( S106). When the correction of the control table 314 is not necessary (S105: correction is unnecessary), the determination unit 313 uses the control table used when the acquisition unit 310 acquires the current temperature θ1 (i−1) one time before. 314 is employed to determine the opening degree of the damper 14 (S107).

  The process of step S10 is repeated until the current temperature θ1 (i) is obtained for all the air-conditioning areas 21 (S108). In the air conditioning system 10 described above, since there are ten air conditioning areas 21 in the building 20, the processing from step S101 to step S105 is repeated for all the ten air conditioning areas 21, and ten control tables 314 are determined. .

  As described above, in the air conditioning system 10 shown in FIG. 1, one of the nine rooms 23 has the two air conditioning areas 21, and these two air conditioning areas 21 have the temperature sensor 18. Shared. Therefore, the same control table 314 can be used for two of the ten air-conditioning areas 21. In this case, the number of repetitions of the processing from step S101 to step S105 may be nine instead of ten.

  When the air conditioning system 10 is in the cooling operation, the control device 30 changes any one of the plurality of types of control tables 314 illustrated in Table 1, Table 3, Table 4, Table 5, and Table 6 to 10 in Step S10. Each of the dampers 14 is selected. The same applies to the case where the air conditioning system 10 is in the heating operation, and the control device 30 selects any one of a plurality of types of control tables 314 including the control table 314 illustrated in Table 2 for each of the ten dampers 14. To do.

  In the operation example illustrated in FIG. 5, when the target temperature is changed in any of the ten air-conditioning areas 21, the control unit 30 causes the acquisition unit 310 to perform the previous operation only in the air-conditioning area 21 in which the target temperature has been changed. The control table 314 employed when the current temperature θ (i−1) is acquired is employed. That is, after calculating the temperature difference Δθ (i) in each air conditioning region 21, it is determined whether or not the target temperature has changed in that air conditioning region 21. In response to this operation, when the target temperature is changed in any of the six air-conditioning areas 21, the control device 30 causes the acquisition unit 310 to acquire the current temperature θ (i The control table 314 employed when acquiring -1) may be employed.

  In step S11, the determination unit 313 uses the control table 314 for each of the ten dampers 14 determined in step S10, and uses the temperature difference Δθ (i) or the temperature difference Δθ (i−1) for each of the ten air-conditioning regions 21. Accordingly, the opening degree of each of the ten dampers 14 is obtained. Then, as described above, the determination unit 313 obtains the air volume of the transport fan 13 based on the opening degree of each of the ten dampers 14, and obtains the air volume of the heat source unit 11 from the air volume of the transport fan 13 in step S13. As described above, the control device 30 first determines the opening amount of each of the ten dampers 14 based on the current temperature of the air conditioning region 21, determines the air volume of each of the two transport fans 13, and then heat source machine 11 air volume is determined.

  The building 20 is not limited to a detached house, but may be another building such as an apartment house or a store. Although the structure provided with the heat pump type heat source device 11 was illustrated as the air conditioning system 10, the air conditioning system 10 may be configured to pass hot water or cold water through a plurality of fan coil units. When only heating is performed, the air conditioning system 10 may be configured to pass steam or hot water through a radiator. In the air conditioning system 10 described above, a HEPA filter is employed as the air filter 12, but it does not prevent the air filter 12 having another configuration from being used. The number of transfer fans 13, the number of dampers 14 and the outlets 15, the number of temperature sensors 18, the number of rooms 23, and the like are examples, and may be changed as appropriate. Further, the transport fan 13 is not an essential component of the air conditioning system 10. That is, the air conditioning system 10 may be configured such that the cold air or the warm air generated by the heat source device 11 is blown out from the air outlet 15 through the damper 14 without being accelerated.

  The opening degree of the damper 14 shown in Table 1 to Table 6 is an example, and is appropriately changed according to the specifications of the air conditioning system 10. For example, in Table 1, the value described as 70 [%] is set to an appropriate value in the range of 50 [%] to 90 [%], and the value described as 40 [%] is , 30 [%] or more and 60 [%] or less in the range. Further, the value described as 25 [%] is set to an appropriate value in the range of 15 [%] to 30 [%]. In Table 1, 5 [%] is set to an appropriate value in the range of 5 [%] to 10 [%] in consideration of the minimum ventilation amount of normal ventilation. In the case of performing continuous ventilation separately from the air conditioning system 10, the minimum value of the opening degree of the damper 14 may be 0 [%]. The range of numerical values described here is also an example, and is appropriately changed depending on the design.

  In Tables 1 to 6, the minimum unit of the temperature difference interval is set to 0.5 [° C.], but the minimum unit of the temperature difference interval is 0.1 [° C.] to 1.5 [° C.]. It can be appropriately determined within the following range, and it is still desirable if it is in the range of 0.1 [° C.] or more and 1.0 [° C.] or less. The number of sections is not limited to five and can be determined as appropriate.

  In the above-described air conditioning system 10, the acquisition unit 310 performs wired communication with the temperature sensor 18, but may perform wireless communication, and even if wired communication and wireless communication are mixed in the building 20. Good. There are no particular restrictions on the communication protocol between the acquisition unit 310 and the temperature sensor 18. In the air conditioning system 10 described above, the acquisition unit 310 inquires each of the plurality of temperature sensors 18 about the current temperature, but the plurality of temperature sensors 18 transmits the current temperature to the acquisition unit 310 at an appropriate timing. There may be.

  In the air conditioning system 10 described above, the degree of difference between the current temperature θ1 (i) and the target temperature θ2 is represented by a temperature difference Δθ (i), and the control device 30 determines whether the damper is based on the temperature difference Δθ (i). The opening of 14 is decided. The degree of difference between the current temperature θ1 (i) and the target temperature θ2 may be expressed by a ratio of the current temperature θ1 (i) to the target temperature θ2.

  In the case where cool air or warm air can be sent from the heat source device 11 to the outlet 15 without providing the transport fan 13 between the heat source device 11 and the damper 14, the transport fan 13 can be omitted. In this case, it is desirable to determine the air volume of the heat source unit 11 using an evaluation value corresponding to the average value of the opening degree of the ten dampers 14. Similar to the fan air volume table 317 for determining the air volume of the transport fan 13, the control device 30 associates the air volume of the heat source machine 11 with the average value of the scores when determining the air volume of the heat source machine 11 from the opening of the damper 14. Further, a heat source air volume table 318 (shown by a broken line in FIG. 2) as shown in Table 9 is used. Even when the air volume of the heat source apparatus 11 is determined using the heat source apparatus air volume table 318, the opening degree of the damper 14 is replaced with a score by the score table 316. The control device 30 only needs to include one of the fan air volume table 317 and the heat source machine air volume table 318.

  In the air conditioning system 10 described above, the control device 30 determines the air volume of the transport fan 13 with an average value corresponding to the average value of the opening degrees of the five dampers 14 corresponding to one transport fan 13 as an evaluation value. However, other evaluation values may be used. For example, the evaluation value may be an average value of the opening degrees of the five dampers 14, or may be an average value of the above-described deficiencies.

  The control device 30 for the air conditioning system described above includes a processing unit 31 and a control unit 32. The processing unit 31 determines the amount of heat supplied per unit time from the heat source unit 11 that generates cold air or warm air to each of the plurality of air-conditioning regions 21 of the building 20. The control unit 32 controls the distribution device 102 that distributes the cold air or the warm air generated by the heat source device 11 to the plurality of air conditioning regions 21. The distribution device 102 includes an air supply duct 16 and a damper 14. The air supply duct 16 is branched into a plurality of systems so as to distribute the cold air or the warm air from the heat source device 11 to each of the plurality of air conditioning regions 21. The damper 14 adjusts the flow rate of cool air or warm air that is blown out from the plurality of systems of the air supply duct 16 to the plurality of air conditioning regions 21. The processing unit 31 has at least two functions described below. The first function is a function of determining the opening degree of each of the plurality of dampers 14 according to the amount of heat supplied per unit time to each of the plurality of air conditioning regions 21. The second function is a function of determining the amount of cool air or warm air supplied by the heat source device 11 with respect to an evaluation value corresponding to the average value of the opening degree of each of the plurality of dampers 14.

  The control device 30 for the air conditioning system determines the amount of cool air or warm air supplied by the heat source unit 11 based on the opening degree of the plurality of dampers 14 that determines the amount of heat supplied per unit time to each of the plurality of air conditioning regions 21. It is a configuration. Since the control device 30 determines the air volume of the cool air or the warm air supplied by the heat source device 11 with respect to the evaluation value corresponding to the average value of the opening degrees of the plurality of dampers 14, the possible range of the evaluation value is that of the damper 14. Regardless of the number, it is limited by the adjustment range of the opening degree of the damper 14. Therefore, the air volume adjustment range of the heat source device 11 does not change depending on the number of dampers 14, and the air volume of the heat source device 11 can be used in the full range from the minimum value to the maximum value.

  If the air volume of the heat source unit 11 is associated with the total opening degree of the damper 14, the air volume adjustment range of the heat source unit 11 varies depending on the number of dampers 14, and the number of air-conditioning regions 21 is small. There is a possibility that the air volume of the heat source unit 11 becomes relatively small. On the other hand, since the air volume of the heat source unit 11 is determined by an evaluation value corresponding to the average value of the opening degree of the damper 14, the air volume of the heat source unit 11 can be used in the full range even when the number of the air conditioning regions 21 is small.

  The processing unit 31 is configured to determine the opening degree of the damper 14 based on the degree of difference between the current temperature θ1 (i) acquired every predetermined time and the target temperature θ2 for each of the plurality of air conditioning regions 21. It is desirable.

  That is, the amount of heat supplied per unit time to the air conditioning region 21 is adjusted according to the degree of difference of the current temperature θ1 (i) with respect to the target temperature θ2, and cold air or warm air is distributed according to the amount of heat required by the air conditioning region 21. The

  The processing unit 31 preferably includes a control table 314, a score table 316, a heat source unit air volume table 318, and a determination unit 313. In the control table 314, the opening degree of the damper 14 is associated with each of a plurality of sections in which the degree of difference between the current temperature θ1 (i) and the target temperature θ2 is divided. In the score table 316, a score is associated with the opening degree of the damper 14. The heat source machine air volume table 318 associates the air volume of cool air or warm air supplied by the heat source machine 11 with each of a plurality of sections divided in points. When the current temperature θ1 (i) is acquired, the determination unit 313 obtains the opening degrees of the plurality of dampers 14 based on the control table 314, and then determines the opening degrees of the plurality of dampers 14 based on the score table 316. Find the score corresponding to. The determining unit 313 determines the air volume of the heat source unit 11 based on the heat source unit air volume table 318 using the average value of the obtained scores as an evaluation value.

  That is, after the determining unit 313 determines the opening degree of the damper 14 from the current temperature θ1 (i), the air volume of the heat source unit 11 is determined using the average value of the points corresponding to the opening degree of each of the plurality of dampers 14 as an evaluation value. Therefore, the air volume of the heat source device 11 is determined without requiring a complicated calculation.

  The distribution device 102 may further include a transport fan 13 that sends cold air or warm air supplied from the heat source device 11 to the plurality of dampers 14. In this case, it is desirable that the processing unit 31 is configured to determine the air volume of cool air or warm air supplied by the heat source device 11 after determining the air volume of the transport fan 13 with respect to the evaluation value.

  That is, since the conveyance fan 13 accelerates the cool air or the warm air from the heat source device 11, the amount of heat can be adjusted even in the air-conditioning region 21 away from the heat source device 11. In addition, since the amount of heat supplied per unit time to the air conditioning region 21 is adjusted by the transport fan 13 and the damper 14, it is possible to improve the accuracy of the amount of heat supplied per unit time for each air conditioning region 21. Furthermore, the determination unit 313 determines the air volume of the transport fan 13 after determining the opening degree of the damper 14, and further determines the air volume of the heat source unit 11 based on the air volume of the transport fan 13. Therefore, the control device 30 controls the transport fan 13 and the heat source device 11 in accordance with the amount of heat supplied to the air conditioning region 21, and waste of energy for operating the transport fan 13 and the heat source device 11 is reduced. In this case, the air volume of the heat source unit 11 is indirectly determined after the air volume of the transport fan 13 is determined with respect to the openings of the plurality of dampers 14.

  When there are a plurality of transport fans 13, the air supply duct 16 preferably includes a plurality of branch ducts 161 and a plurality of end ducts 162. The branch duct 161 is provided with a plurality of transport fans 13. The terminal duct 162 is further branched into a plurality of systems from each of the plurality of branch ducts 161, and a plurality of dampers 14 are respectively disposed. In this case, the processing unit 31 determines the opening degree of the damper 14 disposed in each of the plurality of end ducts 162, and then determines the air volume of the transport fan 13 for each of the plurality of branch ducts 161 based on the opening degree of the damper 14. It is desirable to be configured to determine.

  That is, since the plurality of dampers 14 correspond to one transport fan 13 and the air volume of the transport fan 13 is adjusted based on the opening degree of each of the plurality of dampers 14, The number of conveyance fans 13 can be reduced. As a result, the number of transfer fans 13 installed in the building 20 can be reduced, and the cost of introducing equipment can be reduced.

  The processing unit 31 preferably includes a control table 314, a score table 316, a fan air volume table 317, and a determination unit 313. In the control table 314, the opening degree of the damper 14 is associated with each of a plurality of sections in which the degree of difference between the current temperature θ1 (i) and the target temperature θ2 is divided. In the score table 316, a score is associated with the opening degree of the damper 14. In the fan air volume table 317, the air volume of the transport fan 13 is associated with each of a plurality of sections into which the points are divided. When the current temperature θ1 (i) is acquired, the determination unit 313 obtains the opening degrees of the plurality of dampers 14 based on the control table 314, and then determines the opening degrees of the plurality of dampers 14 based on the score table 316. Find the score corresponding to. The determination unit 313 determines the air volume of the transport fan 13 based on the fan air volume table 317 using the average value of the obtained scores as an evaluation value.

  That is, after the determination unit 313 determines the opening degree of the damper 14 from the current temperature θ1 (i), the air volume of the transport fan 13 is determined using the average value of the points corresponding to the opening degree of each of the plurality of dampers 14 as an evaluation value. Therefore, the air volume of the conveying fan 13 is determined without requiring complicated calculation.

  The air conditioning system 10 described above includes a heat source device 11, a distribution device 102, a plurality of temperature sensors 18, and a control device 30. The heat source unit 11 generates cool air or warm air supplied to the building 20. The distribution device 102 distributes the cold air or the warm air generated by the heat source device 11 to the plurality of air conditioning regions 21 in the building 20. The plurality of temperature sensors 18 measure the temperature of each of the plurality of air-conditioning regions 21. The control device 30 is configured to acquire the temperature measured by the plurality of temperature sensors 18 as the current temperature θ1 (i).

  That is, the air conditioning system 10 acquires the current temperature θ1 (i) from the temperature sensor 18 where the control device 30 measures the temperature of the air conditioning region 21, and supplies thermal energy to the air conditioning region 21 based on the current temperature θ1 (i). To distribute.

  The embodiments described above are only some of the various embodiments of the present invention. Further, the above-described embodiment can be variously changed according to the design or the like as long as the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 10 Air conditioning system 11 Heat source machine 13 Conveyance fan 14 Damper 16 Air supply duct 18 Temperature sensor 20 Building 21 Air-conditioning area 30 Control apparatus 31 Processing part 32 Control part 102 Distribution apparatus 161 Branching duct 162 Terminal duct 313 Determination part 314 Control table 316 Point table 317 Fan air volume table 318 Heat source air volume table θ1 (i) Current temperature θ2 Target temperature

Claims (8)

A processing unit that determines the amount of heat supplied per unit time from a heat source device that generates cold air or warm air to each of a plurality of air conditioning regions of the building;
A controller that controls a distribution device that distributes the cold air or the warm air generated by the heat source device to the plurality of air-conditioning regions,
The distributor is
An air supply duct branched into a plurality of systems so as to distribute the cold air or the warm air from the heat source unit to each of the plurality of air conditioning regions;
A plurality of dampers for adjusting the flow rate of the cold air or the warm air blown out from each of the plurality of systems of the air supply duct to the plurality of air conditioning regions,
The processor is
A function of determining the degree of opening of each of the plurality of dampers according to the amount of heat supplied per unit time to each of the plurality of air conditioning regions;
A control for an air conditioning system, which has a function of determining an air volume of the cool air or the warm air supplied by the heat source device with respect to an evaluation value corresponding to an average value of the opening degree of each of the plurality of dampers. apparatus. The processor is
The control for an air conditioning system according to claim 1, wherein each of the plurality of air conditioning regions is configured to determine an opening degree of the damper based on a degree of difference between a current temperature acquired at a predetermined time and a target temperature. apparatus. The processor is
A control table in which the opening degree of the damper is associated with each of a plurality of sections into which the degree of difference between the current temperature and the target temperature is divided;
A score table in which a score is associated with the opening of the damper;
An air volume table that associates the air volume of the cool air or the warm air supplied by the heat source unit to each of the plurality of sections into which the score is divided;
When the current temperature is acquired, after obtaining the opening degree of each of the plurality of dampers based on the control table, the point corresponding to the opening degree of each of the plurality of dampers is obtained based on the point table, and obtained. The control device for an air conditioning system according to claim 2, further comprising: a determination unit that determines the air volume of the heat source unit based on the air volume table using the average value of the scores as the evaluation value. The distributor is
A transport fan for sending the cool air or warm air supplied by the heat source unit to the plurality of dampers;
The processor is
The control device for an air conditioning system according to claim 1, wherein the air volume of the cooling fan or the warm air supplied by the heat source unit is determined after determining the air volume of the transport fan with respect to the evaluation value. . There are a plurality of the transport fans,
The air supply duct is
A plurality of branch ducts through which the cool air or the warm air from each of the plurality of transport fans passes;
A plurality of end ducts branched from each of the plurality of branch ducts into a plurality of systems, and the plurality of dampers are respectively disposed;
The processor is
After determining the opening degree of the damper disposed in each of the plurality of terminal ducts, the air volume of the transfer fan is determined for each of the plurality of branch ducts based on the opening degree of the damper. The control device for an air conditioning system according to claim 4. The processor is
6. The air conditioning system according to claim 4, wherein each of the plurality of air conditioning regions is configured to determine the opening degree of the damper based on a degree of difference between a current temperature and a target temperature acquired every predetermined time. Control device. The processor is
A control table in which the opening degree of the damper is associated with each of a plurality of sections into which the degree of difference between the current temperature and the target temperature is divided;
A score table in which a score is associated with the opening of the damper;
A fan air volume table in which the air volume of the transport fan is associated with each of the plurality of sections into which the score is divided;
When the current temperature is acquired, after obtaining the opening degree of each of the plurality of dampers based on the control table, the point corresponding to the opening degree of each of the plurality of dampers is obtained based on the point table, and obtained. The control device for an air conditioning system according to claim 6, further comprising: a determination unit that determines an air volume of the transport fan based on the fan air volume table using an average value of the scores as the evaluation value. A heat source that generates cold or warm air to be supplied to the building;
A distribution device that distributes the cold air or the warm air generated by the heat source unit to a plurality of air conditioning regions in the building;
A plurality of temperature sensors for measuring the temperature of each of the plurality of air-conditioning regions;
The control device for an air conditioning system according to any one of claims 2, 3, 6, and 7 configured to acquire temperatures measured by the plurality of temperature sensors as a current temperature. Air conditioning system.

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