JP7787481B1 - Equipment selection method and equipment selection system - Google Patents

Abstract

[Problem] At the design stage, the actual air conditioning load is unknown, and an appropriate air conditioning device may not be selected for the air conditioning system.
[Solution] This is an equipment selection method for updating at least the air conditioner 100 out of the air conditioners 100 and ventilation devices 200 already installed in a building 10. A pre-renewal ventilation load, which is the ventilation load of the building 10 before the first air conditioner 100a was updated, is calculated from 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 the update, 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 the update to meet the design conditions, is calculated. A second air conditioner 100a is selected based on the building load and the post-renewal ventilation load.
[Selected Figure] Figure 1

Description

Related to equipment selection methods and equipment selection systems.

Traditionally, when planning air conditioning systems during the design stage of a building, ventilation equipment is a given condition for calculating air conditioning loads (Patent Document 1 (JP Patent Publication No. 5-093538)).

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.

The first aspect of the equipment selection method is an equipment selection method for updating at least one of the air conditioning units and ventilation units already installed in a building. The air conditioning unit before the update is designated the first air conditioning unit, and the air conditioning unit after the update is designated the second air conditioning unit. The pre-update ventilation load, which is the ventilation load of the building before the first air conditioning unit was updated, is calculated based on the specifications of the ventilation unit and the past operating state of the ventilation unit. The 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 conditioning unit, and the pre-update ventilation load. When updating the air conditioning units, the post-update ventilation load, which is the ventilation load of the building after the update to meet the design conditions, is calculated. The second air conditioning unit is selected based on the building load and the post-update ventilation load.

This equipment selection method uses actual operating data from the air conditioning unit before the upgrade to calculate the building load and ventilation load, allowing for the appropriate selection of the new air conditioning unit.

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.

The equipment selection method of the third aspect is the method of the first or second aspect, in which the outdoor air load at the ventilation air volume is calculated based on the ventilation air volume of the ventilation device. The ventilation load is calculated based on the outdoor air load.

This equipment selection method makes it easy to calculate the ventilation load based on the ventilation air volume and outdoor air load of the ventilation device.

The equipment selection method of the fourth aspect is any of the methods of the first to third aspects, in which the ventilation load is calculated based on the building's outdoor temperature, indoor temperature, and outdoor absolute humidity, and indoor absolute humidity.

This equipment selection method makes it easy to calculate ventilation load based on the outdoor temperature, indoor temperature, and outdoor absolute humidity, and indoor absolute humidity.

The equipment selection method of the fifth aspect is any of the methods of the first to fourth aspects, 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.

This equipment selection method allows you to select air conditioning equipment that takes into account the air conditioning capacity of the ventilation equipment when updating air conditioning equipment.

The equipment selection method of a sixth aspect is the method of any one of the first to fourth aspects, in which the ventilation device includes at least one of a ventilation fan having a propeller fan and a ventilation fan having a sirocco fan.

This equipment selection method allows you to select an air conditioning unit when the ventilation device is a ventilation fan.

The equipment selection method of the seventh aspect is the method of the fifth aspect, in which the ventilation device includes at least one of a total heat exchanger, an outdoor air-conditioning unit, and a humidity control device.

This equipment selection method allows you to select air conditioning equipment that takes into account the air conditioning capacity of the ventilation equipment when updating air conditioning equipment.

The equipment selection method of an eighth aspect is the method of the seventh aspect, wherein 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 humidification function.

This equipment selection method allows you to select air conditioning equipment that takes into account the air conditioning capacity of the ventilation equipment when updating air conditioning equipment.

The equipment selection system of a ninth aspect is an equipment selection system for updating at least one of air conditioners and ventilation equipment 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 equipment and the past operating state of the ventilation equipment. 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 the 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.

This equipment selection system uses actual operating data from the air conditioning unit before the upgrade to calculate building load and ventilation load, allowing for the appropriate selection of the new air conditioning unit.

FIG. 1 is a schematic configuration diagram of a device selection system. FIG. 1 is a schematic diagram of an air conditioning device. 10 is a flowchart illustrating an example of processing of the device selection system. 10 is a flowchart illustrating an example of a conventional device selection process.

(1) Overall Configuration 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 conditioner 100 and the ventilation device 200 already installed in the 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.

(2) Detailed Configuration of the Equipment Selection System (2-1) Air Conditioning Device The air conditioning device (air conditioner) 100 configures a vapor compression refrigeration cycle and conditions the air in the target space SP of the building 10. FIG. 2 is a schematic configuration diagram of the air conditioning device 100. The air conditioning device 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 configuration is not limited thereto, and the air conditioning device 100 may comprise a plurality of indoor units 40 and a plurality of outdoor units 50. For example, the air conditioning device 100 may be a multi-type air conditioning device having one outdoor unit 50 and a plurality of indoor units 40.

The indoor unit 40 and the outdoor unit 50 are connected via a liquid refrigerant connection pipe 31 and a gas refrigerant connection pipe 32 to form a refrigerant circuit 33. The refrigerant circuit 33 includes an indoor expansion valve 41 and an indoor heat exchanger 42 of the indoor unit 40. The refrigerant circuit 33 also includes 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.

The air conditioning system 100 has two main operating modes: a cooling operation mode in which cooling is performed, and a heating operation mode in which heating is performed. 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, cooling the air in the target space SP of the building 10 in which the indoor unit 40 is installed. 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, heating the air in the target space SP of the building 10 in which the indoor unit 40 is installed.

(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 communication pipe 31 and a gas refrigerant communication pipe 32. The indoor unit 40 has an indoor refrigerant circuit 33a that constitutes part of the refrigerant circuit 33.

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 possessed by the indoor unit 40 will be described later.

(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.

(2-1-1-2) Indoor Heat Exchanger In the indoor heat exchanger 42, heat is exchanged 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.

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.

(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.

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

The indoor temperature sensor 45a is installed on the air intake side of the 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).

The indoor humidity sensor 45b is installed on the air intake side of the 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.

(2-1-1-5) Indoor control unit The indoor control unit 44 controls the operation of each unit that makes up 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 out 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 out information stored in the storage device in accordance with the program.

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

The indoor control unit 44 is connected to the outdoor control unit 57 of the outdoor unit 50 via a transmission line 61, allowing for the exchange of control signals and the like. Note that the indoor control unit 44 and the outdoor control unit 57 do not have to be physically connected via the transmission line 61, and may be connected to enable wireless communication. 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 conditioning unit 100. The air conditioning control unit 60 will be described later.

(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 apparatus 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 communication pipe 31 and a gas refrigerant communication pipe 32. The outdoor unit 50 has an outdoor-side refrigerant circuit 33b that constitutes part of the refrigerant circuit 33.

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.

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 the 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 communication piping 31. An outdoor expansion valve 54 is provided in the liquid refrigerant pipe 34d. A liquid-side shutoff valve 35 is provided at the connection between the liquid refrigerant pipe 34d and the liquid refrigerant communication 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 shutoff valve 36 is provided at the connection between the second gas refrigerant pipe 34e and the gas refrigerant communication pipe 32.

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

The compressor 51 is a volumetric compressor, such as a rotary or scroll type. 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.

(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.

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 within the flow direction switching mechanism 52 in Figure 2.

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.

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

(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.

One end of the outdoor heat exchanger 53 is connected to the liquid refrigerant pipe 34d. The other end of the outdoor heat exchanger 53 is connected to the first gas refrigerant pipe 34c.

The outdoor heat exchanger 53 functions as a refrigerant condenser during cooling operation and as a refrigerant evaporator during heating operation.

(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.

(2-1-2-5) Accumulator The accumulator 55 has a gas-liquid separation function that separates the inflowing refrigerant 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.

(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 the 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.

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

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 of the air outside the room where the outdoor unit 50 is installed (outdoor absolute humidity). The outdoor unit 50 also has sensors that measure refrigerant temperature, refrigerant pressure, etc.

(2-1-2-8) Outdoor Control Unit The outdoor control unit 57 controls the operation of each unit constituting the outdoor unit 50. The outdoor control unit 57 includes 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.

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

The outdoor control unit 57 is connected to the indoor control unit 44 of the indoor unit 40 via a transmission line 61, allowing for the exchange of control signals and the like. The outdoor control unit 57 and the indoor control unit 44 work together to function as the air conditioning control unit 60, which controls the operation of the entire air conditioning unit 100. The air conditioning control unit 60 will be described later.

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 conditioning apparatus 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.

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

The air conditioning control unit 60 controls the operation and shutdown of the air conditioning unit 100 and the operation of various devices in the air conditioning unit 100 based on measurement signals from various sensors 45a, 58a, etc.

The air conditioning control unit 60 also acquires information about the air conditioning device 100 (air conditioning information 410) from the air conditioning device 100 at predetermined time intervals and transmits the information to the air conditioning database 400. In this embodiment, the predetermined time interval is per unit time. For example, the unit time is one hour. The transmitted air conditioning information 410 is stored in the air conditioning database 400.

(2-2) Ventilation Device 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.

(2-3) Equipment Selection Device The equipment selection device 300 of the equipment selection system 1 will be described in detail.

The device selection device 300 is a computer. The device selection device 300 includes a memory unit 310, an input unit 320, a display unit 330, a communication unit 340, and a control unit 350.

(2-3-1) Storage Unit The storage unit 310 is a storage device such as a ROM, a RAM, or a hard disk. The storage unit 310 stores programs executed by the control unit 350, data necessary for executing the programs, and the like. In this embodiment, the necessary data stored includes, for example, setting conditions.

(2-3-2) Input Unit The input unit 320 is a keyboard and a mouse. Various commands and information for the equipment selection device 300 can be input using the input unit 320. For example, a user of the equipment selection system 1 can use the input unit 320 to input information regarding standard requirements (setting conditions) for a specified air environment.

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

(2-3-4) Communication Unit The communication unit 340 is a network interface device for communicating with the air conditioners 100, the ventilation devices 200, etc. The communication unit 340 communicates with the air conditioners 100, the ventilation devices 200, etc. to receive information.

(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 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.

(2-3-5-1) Acquisition Unit The acquisition unit 351 acquires actual 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 total processing heat load of the first air conditioner 100a from the air conditioning information 410 in the air conditioning database 400, thereby acquiring the air conditioning capacity of the first air conditioner 100a.

The acquisition unit 351 also 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. It is also assumed that the first ventilation device 200a has been operating at a predetermined time over 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.

(2-3-5-2) Calculation Unit 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."

The calculation unit 352 calculates the "actual outdoor air load" by, for example, converting the fan strength/weakness operation data (actual 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 in indoor/outdoor specific enthalpy. The difference in indoor/outdoor specific enthalpy is the difference in specific enthalpy between the target space SP and the outdoors. The calculation unit 352 uses actual measurement data, data from the Japan Meteorological Agency, etc., as the difference in indoor/outdoor specific enthalpy.

The calculation unit 352 further calculates the "actual ventilation device load" relative to the "actual outdoor 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 200 is the catalog value listed in the catalog for the first ventilation device 200a. Note that, depending on the model of the ventilation device 200, the "actual ventilation device load" may be directly acquired as operating data.

The calculation unit 352 also 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 unit 100a, and the pre-update ventilation load.

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 heat load processed by the first air conditioning unit 100a (pre-update air conditioning load).

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 unit 100 or ventilation unit 200 is updated.

In addition, when updating the air conditioning unit 100, the calculation unit 352 calculates the updated ventilation load, which is the ventilation load of the building 10 after the update so that it meets the design conditions. In other words, when updating the air conditioning unit 100, the calculation unit 352 calculates the updated ventilation load, which is the ventilation load of the building 10 after the update so that the carbon dioxide content, etc. in the target space SP of the building 10 meets the standard requirements for the specified 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".

The calculation unit 352 calculates the "estimated outdoor air load" by multiplying the amount of outdoor air introduced by the difference in internal and external specific enthalpy. The calculation unit 352 uses actual measurement data, data from the Japan Meteorological Agency, etc. as the difference in internal and external specific enthalpy. In calculating the "estimated ventilation load," the calculation unit 352 may use data from before the ventilation device 200 was updated as the amount of outdoor air introduced, or, if the operation of the target space SP, such as the number of occupants, changes after the ventilation device 200 is updated, the calculation unit 352 may use the amount of outdoor air introduced by the updated 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.

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

Note that, depending on the building, the ventilation device 200 may not have been operating before the update. Therefore, in the post-update simulation, the calculation unit 352 calculates the "estimated ventilation load" assuming that the ventilation device 200 is operating.

(2-3-5-3) Selection Unit The selection unit 353 selects the second air conditioning device 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 the 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.

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 conditioning device 100a obtained from the measured operating data of the first air conditioning device 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 conditioning device 100b, making it possible to select an air conditioning system including the optimal second air conditioning device 100b and second ventilation device 200b.

The user of the equipment selection system 1 updates the first air conditioning device 100a that has already been set up in the building 10 to the second air conditioning device 100b selected by the selection unit 353. The user of the equipment selection system 1 also updates the first ventilation device 200a that has already been set up in the building 10 to the second ventilation device 200b selected by the selection unit 353.

(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.

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 stores this data as air conditioning information 410.

(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.

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

The air conditioning capacity of the first air conditioner 100a is, for example, 61,500 W, which is the total heat processing load of the first air conditioner 100a.

In step S2, the calculation unit 352 calculates the ventilation load of the first ventilation device 200a, which is the equipment before the update. In this embodiment, the calculation unit 352 converts the fan strength/weakness operation data (actual ventilation airflow measurement value) 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, for example, 20,000 [W].

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 the catalog value listed in the catalog for the first ventilation device 200a. If the first ventilation device 200a is a ventilation fan with a propeller fan, then 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.

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].

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 actual operating data of the first air conditioning device 100a acquired in step S1. This makes it possible to calculate the air conditioning load of the building 10 when no ventilation is performed at all (raw air conditioning load) in step S3.

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

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 referred to as the "estimated ventilation load." The updated second ventilation device 200b is selected as a device that can obtain the required ventilation volume to meet the standard requirements for the specified 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.

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

When updating the ventilation device 200 along with updating the air conditioning device 100, the calculation unit 352 calculates the "estimated ventilation device load" relative to the "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 with a propeller fan, it has no heat processing capacity, and therefore the estimated ventilation device load of the second ventilation device 200b is "0".

The calculation unit 352 calculates the "estimated ventilation load" by subtracting the "estimated ventilation equipment load" from the "estimated outdoor air load." In this embodiment, the "estimated ventilation equipment 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].

In step S5, the selection unit 353 selects the second air conditioning unit 100b, which is the updated device.

In this embodiment, the floor area of the target space SP is 400 ^m2 , and the air conditioning capacity required for the target space SP is 22 horsepower (61,500 W). The air conditioning capacity of the first air conditioning device 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.

Assume that the ventilation volume required in the target space SP is 1200 [ ^m3 /h] and the ventilation load of the second ventilation device 200b after the update is 10000 [W]. By adding the ventilation load of the second ventilation device 200b, 10000 [W], to the air conditioning load of the building 10, 41500 [W], the air conditioning capacity of the second air conditioner 100b after the ventilation device update is calculated to be 51500 [W].

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

This allows the optimal second air conditioning unit 100b to be selected in addition to the second ventilation unit 200b in the target space SP of the building 10.

The equipment selection system 1 uses air conditioning information 410 related to the actual operating data of the air conditioners 100, which is stored in the air conditioning database 400, to select updated equipment, thereby reducing annual power consumption. For example, a 20-horsepower second air conditioner 100b consumes less power than a 22-horsepower first air conditioner 100a.

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

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

(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-update 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-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, a post-update ventilation load, which is the ventilation load of the building 10 after updating, is calculated to meet the design conditions. A second air conditioner 100a is selected based on the building load and the post-update ventilation load.

Traditionally, when designing an air conditioning system that includes a ventilation system and an air conditioner, the actual air conditioning load is unknown, so the system tends to be designed with a larger air conditioning load, resulting in issues such as inefficiency and discomfort.

In addition, in properties undergoing renovation, it is possible to use operational data from existing air conditioning equipment to design equipment based on 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.

For example, if you were trying to reduce the size of an air conditioning unit based on actual operating data, and it turned out that the ventilation system was not being used, you would have to give up on the reduction in size because you would not know the load it would have had if it were operating.

An example of a conventional equipment selection process is shown in Figure 4. Figure 4 explains the case of updating an air conditioning unit.

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 conditioning units were updated is calculated. In step S11, the total heat load handled by the air conditioning units is calculated, and the total heat load handled by the air conditioning units 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.

In step S12, the ventilation load before updating the air conditioning unit is calculated. In step S12, the ventilation load is calculated by subtracting the ventilation unit load from the outside air load.

"Outside air load" is the total heat load of outside air introduced into the target space SP. Furthermore, "ventilation device load" is the total heat load of the "outside air load" that is processed by passing through the ventilation device.

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.

"Ventilation system load" is the total heat load processed by the ventilation system, and is listed in the ventilation system catalog as a catalog value. Therefore, for devices such as ceiling fans that have no heat processing capacity, the "ventilation system load" is "0," and the "outdoor air load" and "ventilation load" are equal. Note that for devices such as total heat exchangers that have heat processing capacity, the exchange efficiency is generally listed in the catalog as the percentage of the total heat load that can be processed out of the "outdoor air load."

Subtracting the "ventilation system load" from the "outdoor air load" gives the "ventilation load," or in other words, the load added by ventilation.

In step S13, the new air conditioning unit is selected. In step S13, the new air conditioning capacity is determined by adding the "ventilation load" calculated in step S12 to the total heat load processed by the air conditioning unit calculated in step S11.

In the equipment selection method according to this embodiment, the air conditioning load of the building 10 if no ventilation were performed at all (raw air conditioning load) is calculated based on the actual operating data of the air conditioning unit 100, by subtracting the ventilation load calculated from the specifications and past operating states of the ventilation unit 200. The predicted air conditioning load after the ventilation unit update is calculated by adding the ventilation load, which changes depending on the selection of the ventilation unit 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 load of the already installed ventilation unit 200 is calculated/measured based on the air conditioning load, for which there is a wealth of data and actual measured values can be determined, to calculate the raw air conditioning load. The updated ventilation load is then calculated and the updated air conditioning unit 100 is selected, making it possible to select the optimal air conditioning system (including ventilation) based on the measured load.

This equipment selection method uses actual operating data from the air conditioning unit 100 before the upgrade to calculate the building load and ventilation load, allowing for the appropriate selection of the air conditioning unit 100 after the upgrade.

(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.

This equipment selection method makes it easy to calculate the ventilation load based on the ventilation air volume and outdoor air load of the ventilation device 200.

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

This equipment selection method allows the selection of an air conditioning unit 100 when the ventilation unit 200 is a ventilation fan.

(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 the ventilation devices 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 the update, and a second air conditioner 100b, which is the air conditioner 100 after the update. The control unit 350 calculates a pre-update ventilation load, which is the ventilation load of the building 10 before the first air conditioner 100a was updated, 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 the update, 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 the update 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.

This equipment selection system 1 uses actual operating data from the air conditioning unit 100 before the update to calculate the building load and ventilation load and appropriately select the air conditioning unit 100 after the update.

(5) Modifications (5-1) Modification 1A
The first air conditioning unit 100a installed in the building 10 may be updated, but the first ventilation unit 200a may not be updated. In Modification 1A, the equipment selection system 1 selects the second air conditioning unit 100b, which is the updated equipment. If a change to the ventilation unit 200 is not anticipated, selecting and updating the second air conditioning unit 100b based on the measured air conditioning load of the first air conditioning unit 100a allows an air conditioning unit 100 with an appropriate capacity to be selected, and improvements in comfort and energy efficiency are expected.

For example, when selecting the second air conditioning unit 100b, the peak load can be determined from the actual operating data of the first air conditioning unit 100a, and a second air conditioning unit 100b with as low a capacity as possible can be selected. Furthermore, power consumption can be predicted by calculating the performance of a new second air conditioning unit 100b when installed under the historical operating conditions of the first air conditioning unit 100a before the update, and equipment can be selected, control changes made, and operation schedules adjusted to minimize power consumption.

When updating the air conditioning unit 100, the operation of the ventilation unit 200 may be changed without updating the ventilation unit 200. The ventilation load may be calculated using not only the operating data of the ventilation unit 200, but also the design air volume or measurements taken in the building 10 in which the ventilation unit 200 is installed. In an air conditioning system including the air conditioning unit 100 and the ventilation unit 200, for example, if the ventilation air volume when the ventilation unit 200 is operating is less than the design air volume, the ventilation load may be added to the air conditioning system after the air conditioning unit 100 is updated. Also, a reduction in the ventilation load due to a clogged filter in the ventilation unit 200 may be taken into account. Furthermore, if the ventilation air volume in the air conditioning system before the air conditioning unit 100 is updated is excessive, a reduction in the ventilation load may be considered. Taking into account possible changes in the operation of the ventilation unit 200 and the operation of a ventilation unit 200 that had been stopped, it is possible to design the air conditioning unit 100 based on the actual operating data of the air conditioning unit 100.

The equipment selection method of variant 1A makes it possible to calculate the updated ventilation load when changing the operation of the ventilation device 200 without updating the ventilation device 200.

(5-2) Modification 1B
The calculation unit 352 may calculate the ventilation load based on the outdoor temperature, indoor temperature, outdoor absolute humidity, and indoor absolute humidity of the building 10. The calculation unit 352 uses the acquisition unit 351 to acquire the outdoor temperature, indoor temperature, outdoor 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.

The equipment selection method of variant 1B makes it easy to calculate the ventilation load based on the outdoor temperature, indoor temperature, outdoor absolute humidity, and indoor absolute humidity.

(5-3) Modification 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.

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, heat is exchanged between the exhaust air discharged from the target space SP to the outside and the supply air taken into the target space SP from the outside as fresh air. For example, if the ventilation device 200 is a total heat exchanger, the second air conditioning device 100b may be selected by calculating the ventilation load by subtracting the heat amount corresponding to the heat recovery efficiency of the total heat exchanger (ventilation device load) from the heat amount flowing into the target space SP due to ventilation (outdoor air load).

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 conditioning unit 100b may be selected taking into account the amount of heat flowing into the target space SP due to ventilation, as well as the air conditioning capacity of the outdoor air conditioning unit.

The humidity control device adjusts the humidity of the taken-in outside air and supplies it to the target space SP as supply air, while simultaneously discharging 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 flowing into the target space SP due to ventilation, as well as the output of the humidity control device.

For example, if the ventilation device 200 is an outdoor air conditioning unit or humidity control device, the air conditioning capacity and humidity control device capacity of the ventilation device 200 can be calculated from values output as operating 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 of 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, and the air conditioning capacity of the second air conditioner 100b may be calculated and the second air conditioner 100b may be selected. Furthermore, 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.

For example, an air conditioning system equipped with a total heat exchanger and an air conditioner is a typical air conditioning system and can reduce initial costs. An air conditioning system equipped with an outdoor air conditioning unit and an air conditioner (shared outdoor unit) is also a typical air conditioning system and increases comfort but is wasteful. An air conditioning system equipped with an outdoor air conditioning unit and an air conditioner (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 air conditioning equipment can be designed using a ventilation fan, total heat exchanger, outdoor air conditioning unit, humidity control unit, etc. as the ventilation device 200, the optimal combination can be selected as an integrated ventilation and air conditioning system based on the operating data of the air conditioning device and ventilation device.

In the equipment selection method of variant 1C, when updating an air conditioning unit 100, it is possible to select an air conditioning unit 100 that takes into account the air conditioning capacity of the ventilation device 200.

(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.

REFERENCE SIGNS LIST 1 Equipment selection system 10 Building 100 (100a, 100b) Air conditioner 200 (200a, 200b) Ventilation device 300 Equipment selection device 310 Storage unit 320 Input unit 330 Display unit 340 Communication unit 350 Control unit 351 Setting unit 352 Generation unit 353 Evaluation unit 400 Air conditioning database 410 Air conditioning information

Japanese Patent Application Publication No. 5-093538

Claims (9)

1. An equipment selection method implemented by a computer for use in an equipment selection system 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),
A first step in which the computer calculates a pre-update ventilation load, which is a ventilation load of the building before the first air conditioner is updated, based on specifications of the ventilation device and a past operating state of the ventilation device;
a second step in which the computer calculates a building load, which is a heat load of the building, based on a pre-update air conditioning load, which is an air conditioning load of the building before the update calculated from the actual measured operation data of the first air conditioner, and the pre-update ventilation load;
a third step in which the computer calculates an updated ventilation load, which is a ventilation load of the building after updating to meet design conditions, which are predetermined air environment standards including a carbon dioxide content in the target space of the building, in updating the air conditioning device;
a fourth step in which the computer selects the second air conditioner based on the building load and the updated ventilation load;
An equipment selection method comprising : The computer calculates the post-update ventilation load taking into account that, in updating the air conditioning device, the operation of the ventilation device will be changed without updating the ventilation device.
The device selection method according to claim 1 . In the first step, an outside air load at the ventilation airflow rate is calculated based on the ventilation airflow rate of the ventilation device;
Calculating the pre- update ventilation load based on the outside air load.
The device selection method according to claim 1 or 2. In the third step, the updated ventilation load is calculated based on the outdoor air temperature and the indoor temperature of the building.
The device selection method according to claim 1 or 2. In the fourth step, 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. 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. 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 . 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. 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 , which are predetermined air environment standards including a carbon dioxide content in a target space of the building ;
selecting the second air conditioner based on the building load and the updated ventilation load;
Equipment selection system (1).