Device selection method and device selection system

Abstract

In some cases, the actual air-conditioning load is not known at the design stage, and an appropriate air-conditioning apparatus is not selected in the air-conditioning system.SOLUTION: The device selection method is used when at least an air conditioner 100 is updated among the air conditioner 100 and a ventilator 200 already installed in a building 10. A ventilating load before update which is the ventilating load of the building 10 before updating the first air conditioner 100a is calculated from the specifications of the ventilating device 200 and the past operation state of the ventilating device 200. A building load, which is a thermal load of the building 10, is calculated based on a pre-update air-conditioning load, which is an air-conditioning load of the building 10 before update, and a pre-update ventilating load, which are calculated from the measured operation date of the first air conditioner 100a. In the update of the air conditioner 100, a post-update ventilation load which is a ventilation load of the building 10 after the update is calculated so as to meet the design conditions. The second air conditioner 100a is selected based on the building load and the post-update ventilating load.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device selection method and a device selection system. [Background technology]

[0002] Conventionally, in planning an air conditioning system at the design stage of a building, a ventilation device is a given condition for calculating the air conditioning load (Patent Document 1 (JP Patent Publication No. 5-093538)). Summary of the Invention [Problem to be solved by the invention]

[0003] There is a problem in that the actual air conditioning load is not known at the design stage, and the appropriate air conditioning equipment may not be selected for the air conditioning system. [Means for solving the problem]

[0004] The equipment selection method of a first aspect is an equipment selection method for updating at least an air conditioner among air conditioners and ventilation equipment already installed in a building. The air conditioner before the update is referred to as a first air conditioner, and the air conditioner after the update is referred to as a second air conditioner. A pre-update ventilation load, which is the ventilation load of the building before the first air conditioner was updated, is calculated based on the specifications of the ventilation equipment and the past operating state of the ventilation equipment. A building load, which is the heat load of the building, is calculated based on the pre-update air conditioning load, which is the air conditioning load of the building before the update calculated from the actual operating data of the first air conditioner, and the pre-update ventilation load. When updating the air conditioners, a post-update ventilation load, which is the ventilation load of the building after the update to meet the design conditions, is calculated. A second air conditioner is selected based on the building load and the post-update ventilation load.

[0005] This equipment selection method uses actual measured operating data of the air conditioner before replacement to calculate the building load and ventilation load, making it possible to appropriately select the air conditioner after replacement.

[0006] The equipment selection method according to a second aspect is the method according to the first aspect, in which, when updating the air conditioners, the operation of the ventilation devices is changed without updating the ventilation devices. This equipment selection method makes it possible to calculate the updated ventilation load when changing the operation of the ventilation equipment without updating the ventilation equipment.

[0007] An equipment selection method according to a third aspect is the method according to the first or second aspect, in which an outdoor air load at a ventilation airflow rate is calculated based on the ventilation airflow rate of the ventilation device. The ventilation load is calculated based on the outdoor air load.

[0008] With this equipment selection method, the ventilation load can be easily calculated based on the ventilation air volume and the outdoor air load of the ventilation device.

[0009] The equipment selection method of a fourth aspect is any one of the methods of the first aspect to the third aspect, in which the ventilation load is calculated based on the outdoor air temperature and indoor temperature of the building, and the outdoor air absolute humidity and indoor absolute humidity.

[0010] With this equipment selection method, the ventilation load can be easily calculated based on the outdoor temperature, the indoor temperature, and the outdoor absolute humidity and the indoor absolute humidity.

[0011] The equipment selection method of the fifth aspect is any of the methods of the first aspect to the fourth aspect, in which, if the ventilation device has air conditioning capacity, the second air conditioning device is selected by further taking into account the air conditioning capacity output by the ventilation device.

[0012] With this equipment selection method, when updating an air conditioner, it is possible to select an air conditioner taking into account the air conditioning capacity of the ventilation device.

[0013] An equipment selection method according to a sixth aspect is the method according to any one of the first to fourth aspects, wherein the ventilation device includes at least one of a ventilation fan having a propeller fan and a ventilation fan having a sirocco fan.

[0014] In this equipment selection method, when the ventilation device is a ventilation fan, an air conditioner can be selected.

[0015] An equipment selection method according to a seventh aspect is the method according to the fifth aspect, wherein the ventilation device includes at least one of a total heat exchanger, an outdoor air-conditioning unit, and a humidity control device.

[0016] With this equipment selection method, when updating an air conditioner, it is possible to select an air conditioner taking into account the air conditioning capacity of the ventilation device.

[0017] An eighth aspect of the equipment selection method is the method of the seventh aspect, wherein the total heat exchanger includes a total heat exchanger with a humidification function, and the outdoor air-conditioning unit includes at least one of an outdoor air-conditioning unit with a total heat exchanger, an outdoor air-conditioning unit with a humidification function, and an outdoor air-conditioning unit with a total heat exchanger humidification function.

[0018] With this equipment selection method, when updating an air conditioner, it is possible to select an air conditioner taking into account the air conditioning capacity of the ventilation device.

[0019] An equipment selection system according to a ninth aspect is an equipment selection system for updating at least one of air conditioners and ventilators already installed in a building, and includes a control unit. The air conditioners include a first air conditioner, which is the air conditioner before the update, and a second air conditioner, which is the air conditioner after the update. The control unit calculates a pre-update ventilation load, which is the ventilation load of the building before the first air conditioner was updated, based on the specifications of the ventilation device and the past operating state of the ventilation device. The control unit calculates a building load, which is the thermal load of the building, based on the pre-update air conditioning load, which is the air conditioning load of the building before the update calculated from actual operating data of the first air conditioner, and the pre-update ventilation load. When updating the air conditioners, the control unit calculates a post-update ventilation load, which is the ventilation load of the building after the update to meet the design conditions. The control unit selects the second air conditioner based on the building load and the post-update ventilation load.

[0020] This equipment selection system uses actual operating data from the air conditioning equipment before the upgrade to calculate the building load and ventilation load, making it possible to appropriately select the air conditioning equipment after the upgrade. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic configuration diagram of a device selection system. [Figure 2] FIG. 1 is a schematic diagram of an air conditioning device. [Figure 3] 10 is a flowchart illustrating an example of processing of the device selection system. [Figure 4] 10 is a flowchart illustrating an example of a conventional device selection process. DETAILED DESCRIPTION OF THE INVENTION

[0022] (1) Overall structure An equipment selection system 1 according to an embodiment of the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of the equipment selection system. The equipment selection system 1 mainly includes a computer (equipment selection device) 300 and an air conditioning database 400. The equipment selection system 1 is a system for selecting equipment when updating at least the air conditioner 100 out of the air conditioners 100 and ventilation devices 200 already installed in a building 10. Updating the air conditioner 100 refers to replacing the air conditioner (first air conditioner) 100a already installed in the building 10 with a new air conditioner (second air conditioner) 100b. Updating the ventilation device 200 refers to replacing the ventilation device (first ventilation device) 200a already installed in the building 10 with a new ventilation device (second air conditioner) 200b. In this embodiment, the first air conditioner 100a and the first ventilation device 200a installed in the building 10 are updated. The equipment selection system 1 selects the second air conditioner 100b and the second ventilation device 200b, which are the updated equipment.

[0023] (2) Detailed configuration of the equipment selection system (2-1)Air conditioner The air conditioner (air conditioner) 100 forms a vapor compression refrigeration cycle and conditions the air of a target space SP of a building 10. FIG. 2 is a schematic diagram of the air conditioner 100. The air conditioner 100 mainly comprises an indoor unit 40 and an outdoor unit 50. Note that while FIG. 2 shows one indoor unit 40 and one outdoor unit 50, the air conditioner 100 is not limited to this and may comprise a plurality of indoor units 40 and a plurality of outdoor units 50. For example, the air conditioner 100 may be a multi-type air conditioner having one outdoor unit 50 and a plurality of indoor units 40.

[0024] The indoor unit 40 and the outdoor unit 50 are connected via a liquid refrigerant communication pipe 31 and a gas refrigerant communication pipe 32 to form a refrigerant circuit 33. The refrigerant circuit 33 has an indoor expansion valve 41 and an indoor heat exchanger 42 of the indoor unit 40. The refrigerant circuit 33 also has a compressor 51, a flow direction switching mechanism 52, an outdoor heat exchanger 53, and an outdoor expansion valve 54 of the outdoor unit 50.

[0025] The air conditioner 100 has two main operating modes for air conditioning operation: a cooling operation mode in which cooling operation is performed, and a heating operation mode in which heating operation is performed. The cooling operation is an operation in which the outdoor heat exchanger 53 functions as a refrigerant condenser and the indoor heat exchanger 42 functions as a refrigerant evaporator, thereby cooling the air in the target space SP of the building 10 in which the indoor unit 40 is installed. The heating operation is an operation in which the outdoor heat exchanger 53 functions as a refrigerant evaporator and the indoor heat exchanger 42 functions as a refrigerant condenser, thereby heating the air in the target space SP of the building 10 in which the indoor unit 40 is installed.

[0026] (2-1-1) Indoor unit The indoor unit 40 is a unit installed in the target space SP of the building 10. For example, the indoor unit 40 is a ceiling-embedded unit. As shown in FIG. 2 , the indoor unit 40 is connected to the outdoor unit 50 via a liquid refrigerant connection pipe 31 and a gas refrigerant connection pipe 32. The indoor unit 40 has an indoor refrigerant circuit 33a that constitutes a part of the refrigerant circuit 33.

[0027] The indoor unit 40 mainly has an indoor expansion valve 41, an indoor heat exchanger 42, an indoor fan 43, sensors, and an indoor control unit 44. The various sensors that the indoor unit 40 has will be described later.

[0028] (2-1-1-1) Indoor expansion valve The indoor expansion valve 41 is a mechanism for adjusting the pressure and flow rate of the refrigerant flowing through the indoor refrigerant circuit 33a. The indoor expansion valve 41 is provided in the refrigerant piping that connects the liquid side of the indoor heat exchanger 42 and the liquid refrigerant communication piping 31. The indoor expansion valve 41 is, for example, an electronic expansion valve whose opening degree can be adjusted.

[0029] (2-1-1-2) Indoor heat exchanger In the indoor heat exchanger 42, heat exchange occurs between the refrigerant flowing through the indoor heat exchanger 42 and the air in the target space SP of the building 10. The indoor heat exchanger 42 is, for example, a fin-and-tube heat exchanger having a plurality of heat transfer tubes and fins.

[0030] One end of the indoor heat exchanger 42 is connected to the liquid refrigerant connection pipe 31 via a refrigerant pipe. The other end of the indoor heat exchanger 42 is connected to the gas refrigerant connection pipe 32 via a refrigerant pipe. During cooling operation, refrigerant flows into the indoor heat exchanger 42 from the liquid refrigerant connection pipe 31 side, and the indoor heat exchanger 42 functions as a refrigerant evaporator. During heating operation, refrigerant flows into the indoor heat exchanger 42 from the gas refrigerant connection pipe 32 side, and the indoor heat exchanger 42 functions as a refrigerant condenser.

[0031] (2-1-1-3) Indoor fan The indoor fan 43 is a fan that supplies air to the indoor heat exchanger 42. The indoor fan 43 is, for example, a cross-flow fan. The indoor fan 43 is driven by an indoor fan motor 43a. The rotation speed of the indoor fan motor 43a can be controlled by an inverter.

[0032] (2-1-1-4) Sensor As shown in FIG. 2, the indoor unit 40 has an indoor temperature sensor 45a and an indoor humidity sensor 45b.

[0033] The indoor temperature sensor 45a is provided on the air intake side of a casing (not shown) of the indoor unit 40. The indoor temperature sensor 45a detects the temperature of the air in the target space SP of the building 10 that flows into the casing of the indoor unit 40 (the intake temperature of the indoor unit 40).

[0034] The indoor humidity sensor 45b is provided on the air intake side of a casing (not shown) of the indoor unit 40. The indoor humidity sensor 45b detects the humidity (indoor absolute humidity) of the air in the target space SP of the building 10 that flows into the casing of the indoor unit.

[0035] (2-1-1-5) Indoor control unit The indoor control unit 44 controls the operation of each component of the indoor unit 40. The indoor control unit 44 is equipped with a control and arithmetic device and a storage device. A processor such as a CPU or GPU can be used for the control and arithmetic device. The control and arithmetic device reads a program stored in the storage device and performs predetermined arithmetic processing in accordance with this program. Furthermore, the control and arithmetic device can write the results of calculations to the storage device and read information stored in the storage device in accordance with the program.

[0036] As shown in FIG. 2, the indoor control unit 44 is electrically connected to the indoor expansion valve 41, the indoor fan 43, the indoor temperature sensor 45a, and the indoor humidity sensor 45b so as to be able to exchange control signals and information with them.

[0037] The indoor control unit 44 is connected to the outdoor control unit 57 of the outdoor unit 50 via a transmission line 61 in a state where control signals and the like can be exchanged. Note that the indoor control unit 44 and the outdoor control unit 57 do not have to be physically connected by the transmission line 61, and may be connected so as to be able to communicate wirelessly. The indoor control unit 44, the outdoor control unit 57, and the total heat exchange control unit 21 work together to function as a control unit 60 that controls the operation of the entire air conditioner 100. The air conditioning control unit 60 will be described later.

[0038] (2-1-2) Outdoor unit The outdoor unit 50 is installed, for example, on the roof of the building 10 in which the air conditioning device 100 is installed, or adjacent to the building 10. As shown in Fig. 2 , the outdoor unit 50 is connected to the indoor unit 40 via a liquid refrigerant connection pipe 31 and a gas refrigerant connection pipe 32. The outdoor unit 50 has an outdoor-side refrigerant circuit 33b that constitutes part of the refrigerant circuit 33.

[0039] The outdoor unit 50 mainly includes a compressor 51, a flow direction switching mechanism 52, an outdoor heat exchanger 53, an outdoor expansion valve 54, an accumulator 55, an outdoor fan 56, various sensors, and an outdoor control unit 57. The various sensors included in the outdoor unit 50 will be described later.

[0040] The outdoor unit 50 also has a suction pipe 34a, a discharge pipe 34b, a first gas refrigerant pipe 34c, a liquid refrigerant pipe 34d, a second gas refrigerant pipe 34e, a liquid-side shut-off valve 35, and a gas-side shut-off valve 36. The suction pipe 34a connects a flow direction switching mechanism 52 to the suction side of the compressor 51. An accumulator 55 is provided in the suction pipe 34a. The discharge pipe 34b connects the discharge side of the compressor 51 to the flow direction switching mechanism 52. The first gas refrigerant pipe 34c connects the flow direction switching mechanism 52 to the gas side of the outdoor heat exchanger 53. The liquid refrigerant pipe 34d connects the liquid side of the outdoor heat exchanger 53 to the liquid refrigerant connection pipe 31. An outdoor expansion valve 54 is provided in the liquid refrigerant pipe 34d. A liquid-side shut-off valve 35 is provided at the connection between the liquid refrigerant pipe 34d and the liquid refrigerant connection pipe 31. The second gas refrigerant pipe 34e connects the flow direction switching mechanism 52 and the gas refrigerant communication pipe 32. A gas-side shut-off valve 36 is provided at the connection between the second gas refrigerant pipe 34e and the gas refrigerant communication pipe 32.

[0041] (2-1-2-1) Compressor As shown in FIG. 2, compressor 51 is a device that draws in low-pressure refrigerant in a refrigeration cycle from suction pipe 34a, compresses the refrigerant using a compression mechanism (not shown), and discharges the compressed refrigerant to discharge pipe 34b.

[0042] The compressor 51 is, for example, a rotary or scroll type positive displacement compressor. The compression mechanism of the compressor 51 is driven by a compressor motor 51a. The compression mechanism is driven by the compressor motor 51a, causing the refrigerant to be compressed by the compression mechanism. The compressor motor 51a is a motor whose rotation speed can be controlled by an inverter. The capacity of the compressor 51 is controlled by controlling the rotation speed of the compressor motor 51a.

[0043] (2-1-2-2) Flow direction switching mechanism The flow direction switching mechanism 52 is a mechanism that switches the flow direction of the refrigerant, thereby changing the state of the refrigerant circuit 33 between a first state and a second state.

[0044] When the refrigerant circuit 33 is in the first state, the outdoor heat exchanger 53 functions as a refrigerant condenser, and the indoor heat exchanger 42 functions as a refrigerant evaporator. The flow direction switching mechanism 52 sets the state of the refrigerant circuit 33 to the first state during cooling operation. In other words, during cooling operation, the flow direction switching mechanism 52 connects the suction pipe 34a to the second gas refrigerant pipe 34e and the discharge pipe 34b to the first gas refrigerant pipe 34c, as shown by the solid lines in the flow direction switching mechanism 52 in Figure 2.

[0045] When the refrigerant circuit 33 is in the second state, the outdoor heat exchanger 53 functions as a refrigerant evaporator, and the indoor heat exchanger 42 functions as a refrigerant condenser. The flow direction switching mechanism 52 sets the state of the refrigerant circuit 33 to the second state during heating operation. In other words, during heating operation, the flow direction switching mechanism 52 connects the suction pipe 34a to the first gas refrigerant pipe 34c and the discharge pipe 34b to the second gas refrigerant pipe 34e, as shown by the dashed lines within the flow direction switching mechanism 52 in Figure 2.

[0046] In this embodiment, the flow direction switching mechanism 52 is a four-way switching valve.

[0047] (2-1-2-3) Outdoor heat exchanger In the outdoor heat exchanger 53, heat is exchanged between the refrigerant flowing inside the outdoor heat exchanger 53 and the air outside the room where the outdoor unit 50 is installed. The outdoor heat exchanger 53 is, for example, a fin-and-tube heat exchanger having a plurality of heat transfer tubes and fins.

[0048] One end of the outdoor heat exchanger 53 is connected to the liquid refrigerant pipe 34d, and the other end of the outdoor heat exchanger 53 is connected to the first gas refrigerant pipe 34c.

[0049] The outdoor heat exchanger 53 functions as a condenser of the refrigerant during cooling operation, and functions as an evaporator of the refrigerant during heating operation.

[0050] (2-1-2-4) Outdoor expansion valve The outdoor expansion valve 54 is a mechanism for adjusting the pressure and flow rate of the refrigerant flowing through the liquid refrigerant pipe 34d. As shown in Fig. 2, the outdoor expansion valve 54 is provided in the liquid refrigerant pipe 34d. The outdoor expansion valve 54 is, for example, an electronic expansion valve whose opening degree can be adjusted.

[0051] (2-1-2-5) Accumulator The accumulator 55 has a gas-liquid separation function that separates the refrigerant that flows in into the accumulator 55 into gas refrigerant and liquid refrigerant. The accumulator 55 is also a container that has a function of storing surplus refrigerant that occurs in response to fluctuations in the operating load of the indoor unit 40, etc. As shown in Fig. 2, the accumulator 55 is provided in the suction pipe 34a. The refrigerant that flows into the accumulator 55 is separated into gas refrigerant and liquid refrigerant, and the gas refrigerant that collects in the upper space flows out to the compressor 51.

[0052] (2-1-2-6) Outdoor fan The outdoor fan 56 is a fan that supplies air to the outdoor heat exchanger 53. Specifically, the outdoor fan 56 is a fan that draws heat source air from outside the outdoor unit 50 into a casing (not shown) of the outdoor unit 50, supplies it to the outdoor heat exchanger 53, and discharges the air that has exchanged heat with the refrigerant in the outdoor heat exchanger 53 out of the casing of the outdoor unit 50. The outdoor fan 56 is, for example, a propeller fan. The outdoor fan 56 is driven by an outdoor fan motor 56a. The rotation speed of the outdoor fan motor 56a can be controlled by an inverter.

[0053] (2-1-2-7) Sensor As shown in FIG. 2, the outdoor unit 50 has an outdoor temperature sensor 58a and an outdoor humidity sensor 58b.

[0054] The outdoor temperature sensor 58a measures the temperature of the air outside the room where the outdoor unit 50 is installed. The outdoor humidity sensor 58b measures the humidity (outdoor air absolute humidity) of the air outside the room where the outdoor unit 50 is installed. The outdoor unit 50 also has sensors that measure the refrigerant temperature, refrigerant pressure, etc.

[0055] (2-1-2-8) Outdoor control unit The outdoor control unit 57 controls the operation of each component constituting the outdoor unit 50. The outdoor control unit 57 is equipped with a control and arithmetic device and a storage device. A processor such as a CPU or GPU can be used as the control and arithmetic device. The control and arithmetic device reads a program stored in the storage device and performs predetermined arithmetic processing in accordance with this program. Furthermore, the control and arithmetic device can write the results of calculations to the storage device and read information stored in the storage device in accordance with the program.

[0056] As shown in FIG. 2, the outdoor control unit 57 is electrically connected to the compressor 51, the flow direction switching mechanism 52, the outdoor expansion valve 54, the outdoor fan 56, the outdoor temperature sensor 58a, and the outdoor humidity sensor 58b so as to be able to exchange control signals and information.

[0057] The outdoor control unit 57 is connected to the indoor control unit 44 of the indoor unit 40 via a transmission line 61 in a state where control signals and the like can be exchanged. The outdoor control unit 57 and the indoor control unit 44 work together to function as an air conditioning control unit 60 that controls the overall operation of the air conditioner 100. The air conditioning control unit 60 will be described later.

[0058] (2-1-3) Air conditioning control unit 2, the air conditioning control unit 60 is configured by connecting the indoor control unit 44 of the indoor unit 40 and the outdoor control unit 57 of the outdoor unit 50 so that they can communicate with each other via a transmission line 61. The air conditioning control unit 60 controls the operation of the entire air conditioner 100 by causing the control and arithmetic devices of the indoor control unit 44 and the outdoor control unit 57 to execute programs stored in storage devices.

[0059] 2, the air conditioning control unit 60 is electrically connected to the indoor expansion valve 41, the indoor fan 43, and the indoor temperature sensor 45a of the indoor unit 40. The control unit 60 is also electrically connected to the compressor 51, the flow direction switching mechanism 52, the outdoor expansion valve 54, the outdoor fan 56, and the outdoor temperature sensor 58a of the outdoor unit 50.

[0060] The air conditioning control unit 60 controls the operation and stop of the air conditioner 100 and the operation of various devices of the air conditioner 100 based on measurement signals from the various sensors 45a, 58a, and the like.

[0061] Furthermore, the air conditioning control unit 60 acquires information about the air conditioner 100 (air conditioning information 410) from the air conditioner 100 at predetermined time intervals and transmits it to the air conditioning database 400. In this embodiment, the predetermined time interval is per unit time. The unit time is, for example, one hour. The transmitted air conditioning information 410 is stored in the air conditioning database 400.

[0062] (2-2) Ventilation equipment The ventilation device 200 includes at least one of a ventilation fan having a propeller fan and a ventilation fan having a sirocco fan. The ventilation device 200 draws in indoor air from the target space SP of the building 10 and exhausts it to the outside of the building 10. In this embodiment, the ventilation device 200 is a ventilation fan having a propeller fan.

[0063] (2-3) Equipment selection device The equipment selecting device 300 of the equipment selection system 1 will now be described in detail.

[0064] The device selecting device 300 is a computer and includes a storage unit 310, an input unit 320, a display unit 330, a communication unit 340, and a control unit 350.

[0065] (2-3-1) Storage section The storage unit 310 is a storage device such as a ROM, a RAM, and a hard disk. The storage unit 310 stores programs executed by the control unit 350, data necessary for executing the programs, etc. In this embodiment, the storage unit 310 stores setting conditions, etc. as necessary data.

[0066] (2-3-2) Input section Input unit 320 is a keyboard and a mouse. Various commands and information for equipment selection device 300 can be input using input unit 320. For example, a user of equipment selection system 1 can use input unit 320 to input information relating to standard requirements (setting conditions) for a predetermined air environment.

[0067] (2-3-3) Display section Display unit 330 is an output device such as a display of device selection device 300. For example, the display that is display unit 330 displays an interface for starting the processing of the program executed by control unit 350, and the processing results of the program executed by control unit 350. Display unit 330 can also display the device selection results, etc.

[0068] (2-3-4) Communications Department The communication unit 340 is a network interface device for communicating with the air conditioner 100, the ventilation device 200, etc. The communication unit 340 communicates with the air conditioner 100, the ventilation device 200, etc. and receives information.

[0069] (2-3-5) Control Unit The control unit 350 includes an acquisition unit 351, a calculation unit 352, and a selection unit 353. The control unit 350 also includes a control and arithmetic unit (not shown). A processor such as a CPU or a GPU can be used as the control and arithmetic unit. The control and arithmetic unit reads out a program stored in the storage unit 310 and performs predetermined image processing and arithmetic processing in accordance with the program. Furthermore, the control and arithmetic unit can write the results of calculations to a storage device and read out information stored in the storage unit 310 in accordance with the program.

[0070] (2-3-5-1) Acquisition department The acquisition unit 351 acquires measured operating data of the first air conditioner 100a that has already been set up in the building 10 from the air conditioning information 410 in the air conditioning database 400. The acquisition unit 351 acquires, for example, the indoor temperature and outdoor temperature of the target space SP in which the first air conditioner 100a is installed from the air conditioning information 410 in the air conditioning database 400. The acquisition unit 351 also acquires the indoor absolute humidity and outdoor absolute humidity of the target space SP from the air conditioning information 410 in the air conditioning database 400. The acquisition unit 351 can acquire the air conditioning capacity of the first air conditioner 100a by acquiring the total processing heat load of the first air conditioner 100a from the air conditioning information 410 in the air conditioning database 400.

[0071] Furthermore, the acquisition unit 351 acquires information regarding the specifications of the first ventilation device 200a and the past operating state of the first ventilation device 200a. In this embodiment, the first ventilation device 200a is a ventilation fan having a propeller fan. Furthermore, it is assumed that the first ventilation device 200a has been operating at a predetermined time for the past year, for example. For example, a carbon dioxide concentration sensor may be installed in the first ventilation device 200a to acquire information regarding the operating state of the first ventilation device 200a.

[0072] (2-3-5-2) Calculation section The calculation unit 352 calculates the pre-update ventilation load, which is the ventilation load of the building 10 before the first air conditioning device 100a was updated, from the specifications of the first ventilation device 200a and the past operating state of the first ventilation device 200a. In this embodiment, the ventilation load of the first ventilation device 200a (pre-update ventilation load) is defined as the "actual ventilation load." The calculation unit 352 calculates the "actual ventilation load" by subtracting the "actual ventilation device load" from the "actual outside air load."

[0073] The calculation unit 352 calculates the "actual outdoor air load" by, for example, converting the fan strength / weakness operation data (actually measured ventilation air volume) of the first ventilation device 200a into the amount of outdoor air introduced, and multiplying the converted amount of outdoor air introduced by the difference between the indoor and outdoor specific enthalpy. The difference between the indoor and outdoor specific enthalpy is the difference between the specific enthalpy of the target space SP and the outdoors. The calculation unit 352 uses actual measurement data, data from the Japan Meteorological Agency, or the like as the difference between the indoor and outdoor specific enthalpy.

[0074] The calculation unit 352 further calculates the "actual ventilation device load" relative to the "actual outside air load" from the total processing heat load of the first ventilation device 200a. In this embodiment, the total processing heat load of the first ventilation device 200 is the catalog value listed in the catalog of the first ventilation device 200a. Depending on the model of the ventilation device 200, the "actual ventilation device load" may be directly acquired as operating data.

[0075] In addition, the calculation unit 352 calculates the building load, which is the thermal load of the building 10, based on the pre-update air conditioning load, which is the air conditioning load of the building 10 before the update calculated from the actual operating data of the first air conditioning device 100a, and the pre-update ventilation load.

[0076] The air conditioning load (building load) of the building 10 includes the heat load of people and equipment in the target space SP of the building 10, solar heat entering through windows and walls, and heat load based on the temperature difference between inside and outside. The calculation unit 352 calculates the air conditioning load of the building 10 by subtracting the "actual ventilation load", which is the pre-update ventilation load, from the total processing heat load of the first air conditioner 100a (pre-update air conditioning load).

[0077] Note that the calculation unit 352 calculated the building load of the building 10 based on the pre-update air conditioning load and the pre-update ventilation load, but the building load of the building 10 may be changed when the air conditioning device 100 or the ventilation device 200 is updated.

[0078] Furthermore, when updating the air conditioning device 100, the calculation unit 352 calculates the updated ventilation load, which is the ventilation load of the building 10 after updating so that it meets the design conditions. In other words, when updating the air conditioning device 100, the calculation unit 352 calculates the updated ventilation load, which is the ventilation load of the building 10 after updating so that the carbon dioxide content, etc. in the target space SP of the building 10 meets the standard requirements for a predetermined air environment. The calculation unit 352 performs a simulation and calculates the "estimated ventilation load" (updated ventilation load). The calculation unit 352 finds the "estimated ventilation load" by subtracting the "estimated ventilation equipment load" from the "estimated outside air load".

[0079] The calculation unit 352 calculates the "estimated outdoor air load" by multiplying the amount of outdoor air introduced by the difference between the indoor and outdoor specific enthalpy. The calculation unit 352 uses actual measurement data, data from the Japan Meteorological Agency, or the like as the difference between the indoor and outdoor specific enthalpy. In calculating the "estimated ventilation load," the calculation unit 352 may use data from before the update of the ventilation device 200 as the amount of outdoor air introduced, or may use the amount of outdoor air introduced by the updated ventilation device 200 if the operation of the target space SP, such as the number of occupants, changes after the update of the ventilation device 200. In this embodiment, data on the amount of outdoor air introduced by the first ventilation device 200a before the update is used as the amount of outdoor air introduced.

[0080] When updating the ventilation device 200 together with updating the air conditioning device 100, the calculation unit 352 calculates the "estimated ventilation device load" relative to the "estimated outdoor air load" from the total processing heat load (catalog value) of the updated second ventilation device 200a, etc.

[0081] In addition, depending on the building, the ventilation device 200 may not have been operating before the update, so in the simulation after the update, the calculation unit 352 calculates the "estimated ventilation load" assuming that the ventilation device 200 is operating.

[0082] (2-3-5-3) Selection department The selection unit 353 selects the second air conditioner 100b based on the building load and the updated ventilation load. The selection unit 353 also selects the second ventilation device 200b based on standard requirements for a predetermined air environment, such as a carbon dioxide content, which is the air environment in the target space SP of the building 10. For example, the selection unit 353 selects the second ventilation device 200b so that the carbon dioxide content in the target space SP of the building 10 is 1000 ppm or less.

[0083] The selection unit 353 calculates the building load in the target space SP by subtracting the ventilation load obtained from the measured operating data (ventilation air volume) of the first ventilation device 200a from the total heat processing load of the first air conditioner 100a obtained from the measured operating data of the first air conditioner 100a. The selection unit 353 selects the second ventilation device 200b to meet the specified design conditions of the building 10, and adds the ventilation load of the second ventilation device 200b to the building load of the building 10 calculated by the calculation unit 352 to select the updated second air conditioner 100b, making it possible to select an air conditioning system including the optimal second air conditioner 100b and second ventilation device 200b.

[0084] The user of the equipment selection system 1 updates the first air conditioner 100a that has already been set in the building 10 to the second air conditioner 100b selected by the selection unit 353. In addition, the user of the equipment selection system 1 updates the first ventilation device 200a that has already been set in the building 10 to the second ventilation device 200b selected by the selection unit 353.

[0085] (2-4) Air conditioning database The air conditioning database 400 has air conditioning information 410, which is data related to the operation of the air conditioner 100. The air conditioning information 410 includes actually measured operating data such as the total heat load processed by the air conditioner 100, the rotation speed of the compressor 51 of the air conditioner 100, the indoor temperature, the outdoor temperature, the indoor absolute humidity, and the outdoor absolute humidity.

[0086] The indoor temperature is the measurement value of the indoor temperature sensor 45a when the control unit 60 acquires the air conditioning information 410. The outdoor temperature is the measurement value of the outdoor temperature sensor 58a when the control unit 60 acquires the air conditioning information 410. In this embodiment, the air conditioning database 400 receives actual operating data every hour from the first air conditioner 100a, which is the device before the update, and accumulates the data as air conditioning information 410.

[0087] (3) Processing An example of processing by the device selection system 1 of this embodiment will be described with reference to the flowchart of FIG.

[0088] In step S1, the acquisition unit 351 acquires the air conditioning capacity of the first air conditioner 100a, which is the device before the update. The air conditioning capacity of the first air conditioner 100a is the total processing heat load of the first air conditioner 100a. In this embodiment, the acquisition unit 351 acquires the total processing heat load of the first air conditioner 100a, which is included in the air conditioning information 410 from the air conditioning database 400, as the actually measured operating data of the first air conditioner 100a.

[0089] The air conditioning capacity of the first air conditioner 100a is, for example, 61500 [W], which is the total heat processing load of the first air conditioner 100a.

[0090] In step S2, the calculation unit 352 calculates the ventilation load of the first ventilation device 200a, which is the device before the update. In this embodiment, the calculation unit 352 converts the fan strength / weakness operation data (actual measurement value of ventilation air volume) of the first ventilation device 200a into the amount of outside air introduced, and multiplies the converted amount of outside air introduced by the difference between the inside and outside specific enthalpy to calculate the "actual outside air load." The actual outside air load of the first ventilation device 200a is set to, for example, 20,000 [W].

[0091] The calculation unit 352 further calculates the "actual ventilation device load" relative to the "actual outside air load" from the total heat processing load of the first ventilation device 200a. In this embodiment, the total heat processing load of the first ventilation device 200a is a catalog value listed in the catalog of the first ventilation device 200a. If the first ventilation device 200a is a ventilation fan with a propeller fan, a ceiling fan (ventilation fan) with no heat processing capacity will have a "ventilation device load" of "0", and the "outside air load" and "ventilation load" will be equal.

[0092] The calculation unit 352 calculates the ventilation load of the first ventilation device 200a, which is the "actual ventilation load," by subtracting the "actual ventilation device load" from the "actual outdoor air load." In this embodiment, the "actual ventilation device load" is "0," and the "actual ventilation load" is equal to the "actual outdoor air load," so the ventilation load of the first ventilation device 200a is calculated to be 20,000 [W].

[0093] In step S3, the calculation unit 352 calculates the air conditioning load of the building 10 by subtracting the "actual ventilation load" of the first ventilation device 100b calculated in step S2 from the "air conditioning capacity" which is the actually measured operating data of the first air conditioner 100a acquired in step S1. As a result, in step S3, it is possible to calculate the air conditioning load of the building 10 when no ventilation is performed at all (raw air conditioning load).

[0094] The air conditioning load of the building 10 is, for example, 41,500 [W] obtained by subtracting the ventilation load of the first ventilation device 200a, 20,000 [W], from the total heat processing load (air conditioning capacity) of the first air conditioner 100a, 61,500 [W].

[0095] In step S4, the calculation unit 352 calculates the ventilation load of the second ventilation device 200b, which is the updated device. The ventilation load of the second ventilation device 200b is set to the "estimated ventilation load." The second ventilation device 200b, which is the updated device, is selected as a device that can obtain the required ventilation volume so as to meet the standard requirements for a predetermined air environment in the building 10. In this embodiment, the calculation unit 352 performs a simulation and calculates the "estimated ventilation load" of the selected second ventilation device 200b.

[0096] Specifically, the calculation unit 352 calculates the "estimated outdoor air load" by multiplying the amount of outdoor air introduced by the difference between the indoor and outdoor specific enthalpy. In this embodiment, the data on the amount of outdoor air introduced before the update is used as the amount of outdoor air introduced. The estimated outdoor air load of the second ventilation device 200b is, for example, 10,000 [W].

[0097] When updating the ventilation device 200 together with updating the air conditioner 100, the calculation unit 352 calculates an "estimated ventilation device load" for an "estimated outside air load" from the total heat processing load (catalog value) of the updated second ventilation device 200b, etc. In this embodiment, the total heat processing load of the second ventilation device 200b is the catalog value of the second ventilation device 200b. If the second ventilation device 200b is a ventilation fan having a propeller fan, it has no heat processing capacity, and therefore the estimated ventilation device load of the second ventilation device 200b is "0".

[0098] The calculation unit 352 calculates the "estimated ventilation load" by subtracting the "estimated ventilation device load" from the "estimated outdoor air load." In this embodiment, the "estimated ventilation device load" is "0" and the "estimated ventilation load" is equal to the "estimated outdoor air load," so the ventilation load of the second ventilation device 200b is calculated to be 10,000 [W].

[0099] In step S5, the selection unit 353 selects the second air conditioner 100b, which is the updated device.

[0100] In this embodiment, the floor area of ​​the target space SP is 400 m 2The air conditioning capacity required for the target space SP is 22 horsepower (61,500 W). The air conditioning capacity of the first air conditioner 100a before upgrade that is already installed in the target space SP of the building 10 is 22 horsepower (61,500 W), and the ventilation load of the first ventilation device 200a before upgrade is 20,000 [W].

[0101] The ventilation volume required in the target space SP is 1200 [m 3 / h], and the ventilation load of the second ventilation device 200b after updating is 10,000 [W]. By adding the ventilation load of the second ventilation device 200b, 10,000 [W], to the air conditioning load of the building 10, 41,500 [W], the air conditioning capacity of the second air conditioner 100b after updating the ventilation devices is calculated to be 51,500 [W].

[0102] In the target space SP of the building 10, the first air conditioner 100a with 22 horsepower (61,500 W) has a surplus capacity of 16% compared to the air conditioning capacity of the second air conditioner 100b of 51,500 W. A 20 horsepower air conditioner is selected as the updated second air conditioner 100b.

[0103] As a result, in the target space SP of the building 10, the optimum second air conditioner 100b can be selected together with the second ventilation device 200b.

[0104] The equipment selection system 1 can reduce annual power consumption by selecting updated equipment using air conditioning information 410 related to the actual operating data of the air conditioners 100, which is held in the air conditioning database 400. For example, a 20 horsepower second air conditioner 100b consumes less power than a 22 horsepower first air conditioner 100a.

[0105] The calculation unit 352 can calculate the power consumption of the first air conditioner 100a based on data in the air conditioning database 400 regarding the total heat processing load of the first air conditioner 100a, which is the equipment before the update, and data from the Japan Meteorological Agency regarding the indoor and outdoor temperature and humidity conditions.

[0106] In addition, the calculation unit 352 simulates the operation of the second air conditioning unit 100b, which is the updated equipment, when the total heat load processed by the first air conditioning unit 100a is processed, calculates the hourly power consumption of the second air conditioning unit 100b, and accumulates the annual power consumption.

[0107] (4) Features (4-1) The equipment selection method according to this embodiment is a method for updating at least the air conditioner 100 among the air conditioners 100 and ventilation devices 200 already installed in the building 10. The air conditioner 100 before updating is referred to as the first air conditioner 100a, and the air conditioner 100 after updating is referred to as the second air conditioner 100b. A pre-renewal ventilation load, which is the ventilation load of the building 10 before updating the first air conditioner 100a, is calculated based on the specifications of the ventilation device 200 and the past operating state of the ventilation device 200. A building load, which is the heat load of the building 10, is calculated based on the pre-renewal air conditioning load, which is the air conditioning load of the building 10 before updating, calculated from actual operating data of the first air conditioner 100a, and the pre-renewal ventilation load. When updating the air conditioner 100, a post-renewal ventilation load, which is the ventilation load of the building 10 after updating to meet the design conditions, is calculated. The second air conditioner 100a is selected based on the building load and the post-renewal ventilation load.

[0108] Conventionally, in the equipment design stage of an air conditioning system that includes a ventilation system and an air conditioner, the actual air conditioning load is unknown, so the design tends to be large in air conditioning load, resulting in issues of inefficiency and discomfort.

[0109] Furthermore, in renovated properties, it is possible to use the operating data of existing air conditioning equipment to design equipment in accordance with the actual measured capacity, but capacity data for ventilation equipment is often unavailable, making it impossible to design equipment when changing ventilation equipment or changing the operation of the ventilation equipment.

[0110] For example, if you are trying to reduce the size of an air conditioning unit based on actual operating data, and it turns out that the ventilation system is not being used, you would have to give up on reducing the size because you would not know the load when the ventilation system is operating.

[0111] An example of a conventional device selection process is shown in Fig. 4. Fig. 4 explains the case of updating an air conditioner.

[0112] In step S11, the air conditioning load of the building is calculated. In step S11, the air conditioning load of the building before the air conditioners were updated is calculated. In step S11, the total heat load handled by the air conditioners is calculated, and the total heat load handled by the air conditioners is considered to be the air conditioning load of the building. In other words, in conventional equipment selection processes, the air conditioning load of the building is calculated without taking ventilation into consideration.

[0113] In step S12, the ventilation load before updating the air conditioner is calculated by subtracting the ventilation device load from the outside air load.

[0114] The "outside air load" is the total heat load of the outside air introduced into the target space SP. The "ventilation device load" is the total heat load of the "outside air load" that is treated by passing through the ventilation device.

[0115] The "outdoor air load" is calculated by multiplying the amount of introduced outdoor air by the difference in specific enthalpy between the indoor and outdoor spaces. The difference in specific enthalpy between the target space SP and the outdoors is determined based on design values ​​set by the Ministry of Land, Infrastructure, Transport and Tourism.

[0116] "Ventilation device load" is the total heat load processed by the ventilation device, and is listed in the ventilation device catalog as a catalog value. Therefore, for ceiling fans that do not have heat processing capacity, the "ventilation device load" is "0", and the "outdoor air load" and "ventilation load" are equal. Note that for total heat exchangers with heat processing capacity, the exchange efficiency is generally listed in the catalog as what percentage of the total heat load out of the "outdoor air load" they can process.

[0117] Subtracting the "ventilation device load" from the "outdoor air load" gives the "ventilation load," or in other words, the load added by performing ventilation.

[0118] In step S13, the post-renewal air conditioning unit is selected. In step S13, the post-renewal air conditioning capacity is determined by adding the "ventilation load" calculated in step S12 to the total heat load to be processed by the air conditioning unit calculated in step S11.

[0119] In the equipment selection method according to this embodiment, the air conditioning load of the building 10 in the event of no ventilation at all (raw air conditioning load) is calculated based on the actual operation data of the air conditioning device 100, by subtracting the ventilation load calculated from the specifications of the ventilation device 200 and past operating states, and the predicted air conditioning load after the ventilation device is updated is calculated by adding the ventilation load that changes depending on the selection of the ventilation device 200 to the raw air conditioning load, and air conditioning equipment is designed based on this predicted air conditioning load. In the equipment selection method according to this embodiment, the raw air conditioning load is calculated by calculating / measuring the load of the already installed ventilation device 200 based on the air conditioning load for which there is a wealth of data and actual measured values ​​can be determined, and the updated ventilation load is calculated and the updated air conditioner 100 is selected, thereby making it possible to select an optimal air conditioning system (including ventilation) based on the actually measured load.

[0120] In this equipment selection method, the building load and ventilation load are calculated by using the actual measured operating data of the air conditioner 100 before renewal, and the air conditioner 100 after renewal can be appropriately selected.

[0121] (4-2) The equipment selection method according to the present embodiment calculates the outdoor air load at the ventilation airflow rate based on the ventilation airflow rate of the ventilation device 200. The ventilation load is calculated based on the outdoor air load.

[0122] In this equipment selection method, the ventilation load can be easily calculated based on the ventilation air volume of the ventilation device 200 and the outside air load.

[0123] (4-3) In the equipment selection method according to this embodiment, the ventilation device 200 is a ventilation fan having a propeller fan.

[0124] In this equipment selection method, when the ventilation device 200 is a ventilation fan, the air conditioner 100 can be selected.

[0125] (4-4) The equipment selection system 1 according to this embodiment is an equipment selection system for updating at least the air conditioner 100 among the air conditioners 100 and ventilators 200 already installed in a building 10, and includes a control unit 350. The air conditioners 100 include a first air conditioner 100a, which is the air conditioner 100 before updating, and a second air conditioner 100b, which is the air conditioner 100 after updating. The control unit 350 calculates a pre-update ventilation load, which is the ventilation load of the building 10 before updating the first air conditioner 100a, based on the specifications of the ventilation device 200 and the past operating state of the ventilation device 200. The control unit 350 calculates a building load, which is the heat load of the building 10, based on the pre-update air conditioning load, which is the air conditioning load of the building 10 before updating, calculated from actual operating data of the first air conditioner 100a, and the pre-update ventilation load. When updating the air conditioner 100, the control unit 350 calculates a post-update ventilation load, which is the ventilation load of the building 10 after updating to meet the design conditions. The control unit 350 selects the second air conditioner 100b based on the building load and the updated ventilation load.

[0126] In this equipment selection system 1, by using the actual measured operating data of the air conditioner 100 before renewal, it is possible to calculate the building load and ventilation load and appropriately select the air conditioner 100 after renewal.

[0127] (5) Variations (5-1) Variation 1A The first air conditioner 100a installed in the building 10 may be updated, but the first ventilation device 200a may not be updated. In Modification 1A, the equipment selection system 1 selects the second air conditioner 100b, which is the updated equipment. If no changes to the ventilation device 200 are anticipated, an air conditioner 100 with an appropriate capacity can be selected by selecting and updating the second air conditioner 100b based on the measured air conditioning load of the first air conditioner 100a, and improvements in comfort and energy efficiency are expected.

[0128] For example, when selecting the second air conditioner 100b, the peak load is determined from the actual measured operating data of the first air conditioner 100a, and a second air conditioner 100b with as small a capacity as possible is selected.In addition, power consumption can be predicted by calculating the performance when a new second air conditioner 100b is introduced based on the past operating conditions of the first air conditioner 100a before the update, and equipment selection, control changes, and operation schedule adjustments can be made to minimize power consumption.

[0129] When updating the air conditioner 100, the operation of the ventilation device 200 may be changed without updating the ventilation device 200. The ventilation load may be calculated using not only the operating data of the ventilation device 200 but also the design air volume or measurements taken in the building 10 in which the ventilation device 200 is installed. In an air conditioning system including the air conditioner 100 and the ventilation device 200, for example, if the ventilation air volume when the ventilation device 200 is operating is less than the design air volume, the ventilation load may be added to the air conditioning system after the air conditioner 100 is updated. Furthermore, a reduction in the ventilation load due to a clogged filter in the ventilation device 200 may be taken into consideration. Furthermore, if the ventilation air volume in the air conditioning system before the air conditioner 100 is updated is excessive, a reduction in the ventilation load may be considered. This allows for equipment design of the air conditioner 100 based on the actual operating data of the air conditioner 100, taking into consideration possible changes in the operation of the ventilation device 200 and the operation of the ventilation device 200 that was previously stopped.

[0130] In the equipment selection method of Modification 1A, it is possible to calculate the updated ventilation load when the operation of the ventilation device 200 is changed without updating the ventilation device 200.

[0131] (5-2) Variation 1B The calculation unit 352 may calculate the ventilation load based on the outdoor air temperature, indoor temperature, outdoor air absolute humidity, and indoor absolute humidity of the building 10. The calculation unit 352 uses the acquisition unit 351 to acquire the outdoor air temperature, indoor temperature, outdoor air absolute humidity, and indoor absolute humidity of the building 10 from the air conditioning information 410 in the air conditioning database 400, and calculates the ventilation load.

[0132] In the equipment selection method of Modification 1B, the ventilation load can be easily calculated based on the outdoor air temperature, the indoor temperature, the outdoor air absolute humidity, and the indoor absolute humidity.

[0133] (5-3) Variation 1C If the ventilation device 200 has air conditioning capacity, the second air conditioner 100b may be selected by further taking into account the air conditioning capacity output by the ventilation device 200. The ventilation device 200 may be a device with air conditioning capacity that includes at least one of a total heat exchanger, an outdoor air conditioning unit, and a humidity control unit. The total heat exchanger includes a total heat exchanger with a humidification function. The outdoor air conditioning unit includes at least one of an outdoor air conditioning unit with a total heat exchanger, an outdoor air conditioning unit with a humidification function, and an outdoor air conditioning unit with a total heat exchanger and humidification function.

[0134] The total heat exchanger is placed in the space above the ceiling of the target space SP of the building 10, and while ventilating the target space SP, performs heat exchange between exhaust air discharged from the target space SP to the outdoors and supply air taken into the target space SP as fresh air from outdoors. For example, if the ventilation device 200 is a total heat exchanger, the second air conditioner 100b may be selected by calculating the ventilation load by subtracting the amount of heat (ventilation device load) corresponding to the heat recovery efficiency of the total heat exchanger from the amount of heat flowing into the target space SP due to ventilation (outdoor air load).

[0135] The outdoor air-conditioning unit takes in outside air, cools or heats it, and supplies it as supply air to the target space SP. For example, if the ventilation device 200 is an outdoor air-conditioning unit, the second air conditioner 100b may be selected taking into account the amount of heat that flows into the target space SP due to ventilation, as well as the air-conditioning capacity of the outdoor air-conditioning unit.

[0136] The humidity control device adjusts the humidity of the taken-in outside air and supplies it to the target space SP as supply air, and at the same time, discharges the taken-in indoor air to the outside as exhaust air. For example, if the ventilation device 200 is a humidity control device, the second air conditioner 100b may be selected taking into account the amount of heat that flows into the target space SP due to ventilation and the output of the humidity control device.

[0137] For example, if the ventilation device 200 is an outdoor air conditioning unit or a humidity control device, the air conditioning capacity and humidity control device capacity of the ventilation device 200 can be calculated from values ​​output as operational data such as the fan notch (rotation level) and power value of the ventilation device 200, or from the dehumidification / humidification capacity (catalog value) corresponding to the ventilation air volume. If the ventilation device has air conditioning capacity, the ventilation device may process all of the outdoor air load and also perform heat treatment for the indoor load included in the air conditioning load of the building 10. If the air conditioning capacity and humidity control device capacity of the ventilation device 200 are lower than the amount of heat flowing in due to ventilation (outdoor air load), the unprocessed heat amount of the outdoor air load by the ventilation device may be added to the air conditioning load of the building 10 as the ventilation load to be borne by the air conditioner, thereby determining the air conditioning capacity of the second air conditioner 100b, and the second air conditioner 100b may be selected. In addition, if the air conditioning capacity or humidity control capacity of the ventilation device 200 exceeds the outdoor air load, the indoor load where heat treatment is performed by the ventilation device can be subtracted from the air conditioning load of the building 10 to determine the air conditioning capacity of the second air conditioning device 100b, and the second air conditioning device 100b can be selected.

[0138] For example, an air conditioning system equipped with a total heat exchanger and an air conditioner is a typical air conditioning system that can reduce initial costs. An air conditioning system equipped with an outdoor air conditioning unit and an air conditioner (with a shared outdoor unit) is also a typical air conditioning system that increases comfort but is wasteful. An air conditioning system equipped with an outdoor air conditioning unit and an air conditioner (with a separate outdoor unit) increases initial costs but reduces waste, thereby reducing power consumption costs. An air conditioning system equipped with a humidity control unit and an air conditioner can also adjust humidity, and because the humidity control unit has air conditioning capacity (mainly latent heat capacity), significant energy savings can be achieved by changing the size and control of the air conditioner. Since it is possible to design air conditioning equipment using a ventilation fan, total heat exchanger, outdoor air conditioning unit, humidity control unit, etc. as the ventilation device 200, it is possible to select the optimal combination as an integrated ventilation and air conditioning system according to the operating data of the air conditioning device and ventilation device.

[0139] In the equipment selection method of Modification 1C, when updating the air conditioner 100, the air conditioner 100 can be selected taking into account the air conditioning capacity of the ventilation device 200.

[0140] (5-4) Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as defined in the claims. [Explanation of symbols]

[0141] 1. Equipment selection system 10 Building 100(100a, 100b) Air conditioner 200(200a, 200b) Ventilation equipment 300 Equipment selection device 310 Storage section 320 Input section 330 Display section 340 Communications Department 350 control section 351 Settings 352 Generation part 353 Evaluation Department 400 Air Conditioning Database 410 Air Conditioning Information [Prior art documents] [Patent documents]

[0142] [Patent Document 1] Japanese Patent Application Publication No. 5-093538

Claims

1. A method for selecting equipment when updating at least one of an air conditioning device (100) and a ventilation device (200) already installed in a building (10), comprising: The air conditioner before renewal is referred to as a first air conditioner (100a), and the air conditioner after renewal is referred to as a second air conditioner (100b), calculating a pre-renewal ventilation load, which is a ventilation load of the building before the first air conditioner was renewed, from specifications of the ventilation device and a past operating state of the ventilation device; calculating a building load, which is a thermal load of the building, based on a pre-renewal air conditioning load, which is an air conditioning load of the building before the renewal, calculated from the actual measured operating data of the first air conditioner, and the pre-renewal ventilation load; In updating the air conditioning device, a post-update ventilation load is calculated, which is a ventilation load of the building after updating to meet design conditions; selecting the second air conditioner based on the building load and the updated ventilation load; Equipment selection method.

2. In updating the air conditioning device, the operation of the ventilation device is changed without updating the ventilation device. The device selection method according to claim 1 .

3. Calculating an outside air load at the ventilation air volume based on the ventilation air volume of the ventilation device; Calculating the ventilation load based on the outdoor air load. The device selection method according to claim 1 or 2.

4. Calculating the ventilation load based on the outdoor air temperature and the indoor temperature of the building. The device selection method according to claim 1 or 2.

5. When the ventilation device has an air conditioning capacity, the second air conditioner is selected by further taking into account the air conditioning capacity output by the ventilation device. The device selection method according to claim 1 or 2.

6. The ventilation device includes at least one of a ventilation fan having a propeller fan and a ventilation fan having a sirocco fan. The device selection method according to claim 1 or 2.

7. The ventilation device includes at least one of a total heat exchanger, an outdoor air conditioning unit, and a humidity control device. The device selection method according to claim 5 .

8. The total heat exchanger includes a total heat exchanger with a humidification function, The outdoor air-conditioning unit includes at least one of an outdoor air-conditioning unit with a total heat exchanger, an outdoor air-conditioning unit with a humidification function, and an outdoor air-conditioning unit with a total heat exchange humidification function, The device selection method according to claim 7.

9. An equipment selection system for updating at least one of an air conditioning device (100) and a ventilation device (200) already installed in a building (10), comprising: A control unit (350) is provided, The air conditioner includes a first air conditioner (100a) that is the air conditioner before updating and a second air conditioner (100b) that is the air conditioner after updating, The control unit calculating a pre-renewal ventilation load, which is a ventilation load of the building before the first air conditioner was renewed, from specifications of the ventilation device and a past operating state of the ventilation device; calculating a building load, which is a thermal load of the building, based on a pre-renewal air conditioning load, which is an air conditioning load of the building before the renewal, calculated from the actual measured operating data of the first air conditioner, and the pre-renewal ventilation load; In updating the air conditioning device, a post-update ventilation load is calculated, which is a ventilation load of the building after updating to meet design conditions; selecting the second air conditioner based on the building load and the updated ventilation load; Equipment selection system (1).

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