Air conditioner selection method, program, and information processing device

Abstract

To provide an air conditioner selection method, program, and information processing device for appropriately selecting air conditioners. [Solution] An air conditioner selection method in which the control unit of an information processing device selects an air conditioner, wherein indoor units 12A to 12C of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned are provisionally selected, an outdoor unit 13 of the air conditioner is selected based on the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C, and indoor units 12A to 12C are re-selected so that the sum of the air conditioning capacities of the indoor units 12A to 12C is greater than the capacity of the indoor units that can be connected to the selected outdoor unit 13.

Description

Technical Field

[0001] The present disclosure relates to an air conditioner selection method, a program, and an information processing apparatus.

Background Art

[0002] In an air conditioning system composed of a multi-split air conditioner for buildings applied to office buildings and the like and an outdoor air processing unit, a technique for controlling the operation of indoor units and the outdoor air processing unit as control targets for improving the energy saving level has been conventionally known (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an air conditioning system including an air conditioner and a ventilator, it is possible to reduce initial costs and improve the energy saving level by appropriately selecting the air conditioner. However, in an air conditioning system including an air conditioner and a ventilator, a selection method for appropriately selecting the air conditioner has not been established. Note that the air conditioning system of Patent Document 1 does not describe such a problem.

[0005] An object of the present disclosure is to provide an air conditioner selection method, a program, and an information processing apparatus that can appropriately perform selection of an air conditioner.

Means for Solving the Problems

[0006] A first aspect of this disclosure is an air conditioner selection method in which a control unit of an information processing device selects an air conditioner, wherein the method involves: provisionally selecting an indoor unit of the air conditioner capable of handling the air conditioning load of a space to be air-conditioned; selecting an outdoor unit of the air conditioner based on the sum of the air conditioning capacities of the provisionally selected indoor units; and re-selecting the indoor units such that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit.

[0007] According to the first aspect of this disclosure, an air conditioner selection method can be realized that appropriately selects air conditioners.

[0008] A second aspect of this disclosure is the method for selecting an air conditioner according to the first aspect, wherein, when re-selecting the indoor unit, priority is given to re-selecting a model that increases the airflow of the indoor unit.

[0009] According to a second aspect of this disclosure, an air conditioner can be selected so that the airflow of the indoor unit of the air conditioner is greater.

[0010] A third aspect of this disclosure is an air conditioner selection method according to the first or second aspect, wherein, when re-selecting the indoor unit, priority is given to re-selecting the model of the indoor unit to be installed in the air-conditioned space where the air conditioning load is large.

[0011] According to a third aspect of this disclosure, air conditioners can be selected so as to prioritize air-conditioned spaces with high air conditioning loads.

[0012] A fourth aspect of this disclosure is an air conditioner selection method according to any one of the first to third aspects, comprising: obtaining a first air conditioner load and the required ventilation volume for the air conditioner when the supply air is treated to a constant temperature and humidity condition in relation to the outside temperature and humidity conditions at the peak air conditioner load of the air conditioner target space; selecting a ventilation device capable of handling the first air conditioner load and the required ventilation volume; calculating a second air conditioner load by subtracting the first air conditioner load from the peak air conditioner load of the air conditioner target space; and provisionally selecting an indoor unit of the air conditioner capable of handling the second air conditioner load.

[0013] According to the fourth aspect of this disclosure, the selection of air conditioners and ventilation equipment can be carried out appropriately.

[0014] A fifth aspect of this disclosure is an air conditioner selection method according to any one of the first to fourth aspects, wherein when selecting the outdoor unit, the outdoor unit is selected such that its rated air conditioning capacity is greater than the sum of the air conditioning capacities of the provisionally selected indoor units, and when re-selecting the indoor units, the indoor units are re-selected such that the sum of the air conditioning capacities of the indoor units is less than the capacity of the indoor units that can be connected to the outdoor unit.

[0015] According to a fifth aspect of this disclosure, an air conditioner selection method can be realized that appropriately selects air conditioners to improve energy efficiency.

[0016] A sixth aspect of this disclosure is a program that causes a control unit of an information processing device to execute a process of provisionally selecting an indoor unit of an air conditioner capable of handling the air conditioning load of a space to be air-conditioned, selecting an outdoor unit of the air conditioner based on the sum of the air conditioning capacities of the provisionally selected indoor units, and re-selecting the indoor units so that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit.

[0017] According to the sixth aspect of this disclosure, a program can be provided for appropriately selecting air conditioners.

[0018] A seventh aspect of the present disclosure is an information processing device having a control unit, wherein the control unit provisionally selects an indoor unit of an air conditioner capable of handling the air conditioning load of a space to be air-conditioned, selects an outdoor unit of the air conditioner based on the sum of the air conditioning capacities of the provisionally selected indoor units, and re-selects the indoor units such that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit.

[0019] According to a seventh aspect of this disclosure, an information processing device can be provided that appropriately selects an air conditioner. [Brief explanation of the drawing]

[0020] [Figure 1] This is an explanatory diagram of an example of an air conditioning system, including an air conditioner and ventilation equipment. [Figure 2] FIG. 3 is an explanatory diagram showing an example of peak air conditioning loads of rooms A to C. [Figure 3] FIG. 4 is a hardware configuration diagram showing an example of a computer. [Figure 4] FIG. 5 is a flowchart showing an example of a process for selecting a ventilator. [Figure 5] FIG. 6 is a flowchart showing an example of a process for selecting an indoor unit and an outdoor unit. [Figure 6] FIG. 7 is a flowchart showing an example of a process for selecting an indoor unit and an outdoor unit. [Figure 7] FIG. 8 is a flowchart showing an example of a process for selecting an indoor unit and an outdoor unit. [Figure 8] FIG. 9 is a screen image diagram showing an example of a model selection tool for selecting a ventilator of an air conditioning system. [Figure 9] FIG. 10 is a screen image diagram showing an example of a model selection tool for selecting an indoor unit and an outdoor unit of an air conditioner. [Mode for Carrying Out the Invention]

[0021] Next, embodiments of the present disclosure will be described in detail.

[0022] <Overview> FIG. 1 is an explanatory diagram showing an example of an air conditioning system including an air conditioner and a ventilator. In the air conditioning system shown in FIG. 1, indoor units 12A to 12C of the air conditioner and an outdoor unit 13 are installed so that rooms A to C, which are examples of spaces to be air-conditioned, are air-conditioned. Further, in the air conditioning system shown in FIG. 1, a ventilator 10 and dampers 11A to 11C are installed so that outdoor air is supplied to the rooms A to C. The ventilator 10, the dampers 11A to 11C, the indoor units 12A to 12C, and the outdoor unit 13 are cooperatively controlled by a controller 14.

[0023] The ventilation system 10 takes in outside air, adjusts it, and supplies it to rooms A and C. The ventilation system 10 supplies the adjusted outside air to rooms A and C via dampers 11A and 11C. The ventilation system 10 can, for example, utilize DOAS (Dedicated Outside Air System) ventilation. The ventilation system 10 adjusts (processes) the outside air to a certain temperature and humidity condition and supplies it to rooms A and C. The certain temperature and humidity condition includes the temperature and humidity condition during cooling or the temperature and humidity condition during heating. Note that the certain temperature and humidity condition may include the temperature and humidity condition during cooling and the temperature and humidity condition during heating.

[0024] Indoor unit 12A air-conditions room A. Indoor unit 12B air-conditions room B. Indoor unit 12C air-conditions room C. Indoor units 12A to 12C are connected to the outdoor unit 13 by piping, and using refrigerant circulating through the piping, heat exchange occurs between the indoor air and the outside air in rooms A to C, thereby air-conditioning rooms A to C.

[0025] In the air conditioning system shown in Figure 1, it is expected that initial costs will be reduced and energy efficiency will be improved by appropriately selecting the ventilation unit 10, indoor units 12A to 12C, and outdoor unit 13. Appropriate selection of the ventilation unit 10, indoor units 12A to 12C, and outdoor unit 13 means selecting the ventilation unit 10, indoor units 12A to 12C, and outdoor unit 13 that can share and handle the peak air conditioning load (peak air conditioning load) of rooms A to C, which are examples of spaces to be air-conditioned. Hereafter, indoor units 12A to 12C and outdoor unit 13 will sometimes simply be referred to as air conditioners.

[0026] Figure 2 is an explanatory diagram illustrating an example of peak air conditioning load in rooms A to C. Figure 2(A) shows an example of peak air conditioning load in rooms A to C when a ventilation system 10 that does not perform DOAS ventilation is installed. Figure 2(B) shows an example of peak air conditioning load in rooms A to C when a ventilation system 10 that performs DOAS ventilation is installed.

[0027] The ventilation load in Figure 2(A) is the air conditioning load from the outside air supplied to rooms A-C by ventilation device 10, which does not perform DOAS ventilation. The indoor load (latent heat) in Figure 2(A) is heat containing water vapor, and is the heat generated from the human body or cooking utensils, etc. The indoor load (sensible heat) in Figure 2(A) is heat that does not contain water vapor, and is the heat of recirculation or the heat generated from equipment. Heat of recirculation is the heat that enters the room through walls, roofs, floors, windows, etc.

[0028] Figure 2(B) does not include the ventilation load shown in Figure 2(A) because the ventilation device 10, which performs DOAS ventilation, adjusts the outside air and supplies it to rooms A-C. Furthermore, when the ventilation device 10 performing DOAS ventilation is installed, the peak air conditioning load in rooms A-C is reduced by the DOAS ventilation (load reduction). The air conditioning system shown in Figure 1 can reduce initial costs and improve energy efficiency by selecting the ventilation device 10, indoor units 12A-12C, and outdoor unit 13, as described later, which are capable of handling the peak air conditioning load in rooms A-C, taking into account the reduction in air conditioning load by the ventilation device 10 shown in Figure 2(B) (load reduction).

[0029] The method for selecting the ventilation unit 10, indoor units 12A-12C, and outdoor unit 13 of the air conditioning system shown in Figure 1 is executed by an information processing device having a control unit. However, some of the selection of the ventilation unit 10, indoor units 12A-12C, and outdoor unit 13 of the air conditioning system shown in Figure 1 may be performed manually by an operator. The control unit is a hardware configuration that executes various programs.

[0030] The control unit is a processor such as a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), GPU (Graphics Processing Unit), or FPGA (Field Programmable Gate Array). The control unit can execute various processes described later by running a program.

[0031] An information processing device having a control unit is implemented using one or more computers. This information processing device may be a PC or a workstation, etc. Alternatively, an information processing device having a control unit may be implemented as a cloud computing service.

[0032] The information processing device for selecting the ventilation device 10, indoor units 12A-12C, and outdoor unit 13 of the air conditioning system shown in Figure 1 is implemented by a computer 500 or the like with the hardware configuration shown in Figure 3.

[0033] Figure 3 is a hardware configuration diagram of an example of computer 500. Computer 500 is equipped with an input device 501, a display device 502, an external interface 503, RAM (Random Access Memory) 504, ROM (Read Only Memory) 505, a CPU 506, a communication interface 507, and an HDD (Hard Disk Drive) 508, and each is interconnected via bus B. Note that the input device 501 and the display device 502 may be connected and used only when necessary.

[0034] The input device 501 includes a touch panel, operation keys and buttons, a keyboard and mouse, etc., used by the operator to input various signals. The display device 502 consists of a display such as a liquid crystal or organic EL that displays the screen, and a speaker that outputs sound data such as voice and notification sounds. The communication interface 507 is an interface for the computer 500 to perform data communication via the communication network 60.

[0035] Furthermore, the HDD508 is an example of a non-volatile storage device that stores programs and data. The programs and data stored include the OS (Operating System), which is the basic software that controls the entire computer 500, and applications that provide various functions on the OS. The computer 500 may also use a drive device that uses flash memory as a storage medium (for example, a solid-state drive: SSD) instead of the HDD508.

[0036] External I / F 503 is an interface to an external device. An external device may be a recording medium 503a, for example. Computer 500 reads from and writes to the recording medium 503a via the external I / F 503.

[0037] Recording media 503a include flexible disks, CDs (Compact Discs), DVDs (Digital Versatile Discs), SD (Secure Digital) memory cards, USB (Universal Serial Bus) memory, etc.

[0038] ROM505 is an example of non-volatile semiconductor memory (storage device) that can retain programs and data even when the power is turned off. ROM505 stores programs and data such as the BIOS (Basic Input Output System), OS settings, and network settings that are executed when the computer 500 starts up. RAM504 is an example of volatile semiconductor memory (storage device) that temporarily holds programs and data.

[0039] The CPU 506 is an example of a processor that controls and implements the overall functions of the computer 500 by reading programs and data from storage devices such as the ROM 505 or HDD 508 onto the RAM 504 and executing processing.

[0040] The method for selecting the ventilation device 10, indoor units 12A to 12C, and outdoor unit 13 of the air conditioning system shown in Figure 1 is achieved by the following process.

[0041] An information processing device having a control unit selects the ventilation device 10 of the air conditioning system in Figure 1 by, for example, the process shown in the flowchart in Figure 4. Figure 4 is a flowchart of an example of the process for selecting the ventilation device 10.

[0042] In step S2, the control unit obtains a first air conditioning load when the supply air to rooms A to C is treated to a constant temperature and humidity condition, based on the outside temperature and humidity conditions at the peak air conditioning load of rooms A to C, which are the spaces to be air-conditioned. For example, the control unit obtains a first air conditioning load when the outside air at the peak air conditioning load conditions for cooling is treated to a supply air with a constant temperature and humidity condition (e.g., 20°C). Alternatively, for example, the control unit obtains a first air conditioning load when the outside air at the peak air conditioning load conditions for heating is treated to a supply air with a constant temperature and humidity condition (e.g., 32°C).

[0043] In step S4, the control unit obtains the assumed required ventilation rate for each of the air-conditioned spaces, rooms A to C (the sum of the assumed ventilation rates for each of rooms A to C). The required ventilation rate is calculated using a formula that calculates the required ventilation rate from, for example, the number of people in the room or the carbon dioxide concentration.

[0044] In step S6, the control unit selects a ventilation device that has an air conditioning capacity capable of handling the first air conditioning load acquired in step S2, and a ventilation capacity capable of handling the total required ventilation volume acquired in step S4.

[0045] According to the flowchart shown in Figure 4, initial costs can be reduced compared to selecting a ventilation device 10 that performs DOAS ventilation capable of handling the peak air conditioning load of rooms A to C, which are the air-conditioned spaces, on its own.

[0046] Furthermore, the information processing device having a control unit selects the indoor units 12A to 12C and the outdoor unit 13 of the air conditioner in the air conditioning system shown in Figure 1, for example, by processing the flowcharts shown in Figures 5 to 7. Figures 5 to 7 are flowcharts of an example of the process for selecting the indoor units 12A to 12C and the outdoor unit 13.

[0047] In step S10, the control unit calculates the peak air conditioning load for rooms A to C, taking into account the load reduction due to DOAS ventilation of the ventilation device 10, as shown in Figure 2(B).

[0048] In step S12, the control unit provisionally selects indoor units 12A to 12C that are capable of handling the peak air conditioning loads of rooms A to C calculated in step S10.

[0049] In step S14, the control unit corrects the nominal cooling and heating capacity of the indoor units 12A to 12C, which were provisionally selected in step S12, based on the indoor intake temperature (room temperature). The nominal cooling and heating capacity is sometimes also called the rated cooling and heating capacity.

[0050] In step S16, the control unit determines whether the nominal cooling and heating capacity of indoor units 12A to 12C, corrected in step S14, is equal to or greater than the peak air conditioning load of rooms A to C. If the nominal cooling and heating capacity of indoor units 12A to 12C, corrected in step S14, is not equal to or greater than the peak air conditioning load of rooms A to C, the control unit re-selects indoor units 12A to 12C in step S18. If the nominal cooling and heating capacity of indoor units 12A to 12C, corrected in step S14, is equal to or greater than the peak air conditioning load of rooms A to C, the control unit performs the process in step S20.

[0051] In step S20, the control unit calculates the total cooling and heating capacity of the indoor units 12A to 12C, which were provisionally selected in step S12 or re-selected in S18, by adding the nominal cooling and heating capacities of the indoor units 12A to 12C, which have been corrected by the processing in step S14.

[0052] Through the processing in steps S10 to S20, the control unit can provisionally select indoor units 12A to 12C that can handle the peak air conditioning load of rooms A to C, taking into account the reduction of the air conditioning load by DOAS ventilation of the ventilation device 10.

[0053] In step S22, the control unit provisionally selects the outdoor unit 13 based on the total cooling and heating capacity of the indoor units 12A to 12C calculated in step S20. When provisionally selecting the outdoor unit 13, the control unit provisionally selects the outdoor unit 13 such that its nominal cooling and heating capacity is greater than the sum of the air conditioning capacities of the indoor units 12A to 12C provisionally selected in steps S10 to S20.

[0054] In step S24, the control unit corrects the nominal heating and cooling capacity of the outdoor unit 13 that was provisionally selected in step S22. For example, the control unit corrects it based on the outside air temperature and the room temperature.

[0055] In step S26, the control unit re-selects the indoor units 12A to 12C so that their total cooling and heating capacity is greater than the allowable connection capacity of the outdoor unit 13 provisionally selected in step S22. The allowable connection capacity of the outdoor unit 13 is, for example, 160% to 200% of the outdoor unit 13's rated cooling and heating capacity. The state in which the rated cooling and heating capacity of the outdoor unit 13 is equal to the total cooling and heating capacity of the indoor units 12A to 12C is the state in which the connection capacity is 100%. Note that the allowable connection capacity of the outdoor unit 13 is an example of the capacity of the indoor units 12A to 12C that can be connected to the selected outdoor unit 13.

[0056] In step S26, the re-selection of indoor units 12A to 12C prioritizes the selection of models with higher airflow. By re-selecting indoor units 12A to 12C to increase the maximum fan airflow within the allowable connection capacity of the outdoor unit 13 provisionally selected in step S22, it becomes possible to set a higher target evaporation temperature during cooling, improving the efficiency of the air conditioner and enhancing energy-saving effects. Furthermore, by re-selecting indoor units 12A to 12C to increase the maximum fan airflow within the allowable connection capacity of the outdoor unit 13 provisionally selected in step S22, it becomes possible to set a lower target condensation temperature during heating, improving the efficiency of the air conditioner and enhancing energy-saving effects.

[0057] Furthermore, in step S26, the re-selection of indoor units 12A to 12C may prioritize the re-selection of indoor units 12A to 12C installed in air-conditioned spaces with high peak air conditioning loads. The re-selection of indoor units 12A to 12C in step S26 is a process that prioritizes increasing the rated cooling and heating capacity of indoor units 12A to 12C installed in air-conditioned spaces with high peak air conditioning loads.

[0058] In step S28, the control unit compares the total cooling and heating capacity of the indoor units 12A to 12C, which were re-selected in step S26, with the maximum cooling and heating capacity of the outdoor unit 13, and determines the smaller of the two as the cooling and heating capacity of the air conditioning system.

[0059] In step S30, the control unit determines the cooling and heating capacity of the indoor units 12A to 12C by apportioning the cooling and heating capacity of the air conditioning system determined in step S28.

[0060] In step S32, the control unit determines whether the heating and cooling capacity of the indoor units 12A to 12C in rooms A to C is equal to or greater than the peak air conditioning load of rooms A to C.

[0061] If the heating and cooling capacity of indoor units 12A to 12C in rooms A to C is not equal to or greater than the peak air conditioning load of rooms A to C, the control unit re-selects indoor units 12A to 12C in step S34 and then returns to the process in step S26. If the heating and cooling capacity of indoor units 12A to 12C in rooms A to C is equal to or greater than the peak air conditioning load of rooms A to C, the control unit performs the process in step S36.

[0062] In step S36, the control unit determines whether the refrigerant concentration is below the detection limit concentration in case of refrigerant leakage. If it is below the detection limit concentration in case of refrigerant leakage, the control unit terminates the processing of the flowcharts in Figures 5 to 7. If it is not below the detection limit concentration in case of refrigerant leakage, the control unit proceeds to step S38 and determines whether the issue can be addressed by installing safety measures (without reviewing the air conditioning system). If the issue can be addressed by installing safety measures, the control unit terminates the processing of the flowcharts in Figures 5 to 7. If the issue cannot be addressed by installing safety measures, the control unit re-selects the outdoor unit 13 in step S40 and then returns to the processing of step S24.

[0063] According to the flowcharts shown in Figures 5 to 7, initial costs can be reduced compared to selecting indoor units 12A to 12C and outdoor unit 13 of an air conditioner capable of handling the peak air conditioning load of rooms A to C.

[0064] The flowchart shown in Figure 4 is initiated when an operator operates, for example, the screen of the model selection tool shown in Figure 8. Figure 8 is an example screen image of a model selection tool for selecting a ventilation device 10 for an air conditioning system. In Figure 8, an example of setting temperature conditions is shown as an example of temperature and humidity conditions.

[0065] The screen 1000 of the model selection tool in Figure 8 includes, as an example, an input field 1002 for the supply air temperature conditions during peak air conditioning load and an input field 1004 for the required ventilation volume assumed for each room. The input field 1002 includes input fields for the supply air temperature conditions during peak air conditioning load in cooling mode and input fields for the supply air temperature conditions during peak air conditioning load in heating mode.

[0066] The operator enters the supply air temperature conditions during peak air conditioning load in cooling mode and during peak air conditioning load in heating mode into input field 1002, and then enters the assumed required ventilation volume for each room (the total value of the assumed ventilation volume for each room) into input field 1004, before pressing the execute button 1006.

[0067] When the operator presses the execute button 1006, the information processing device, which has a control unit, starts processing the flowchart shown in Figure 4, selects the ventilation device 10 of the air conditioning system shown in Figure 1, and displays the selection result.

[0068] The flowchart process shown in Figures 5 to 7 is initiated when an operator operates, for example, the screen of the model selection tool shown in Figure 9. Figure 9 is an example screen image of a model selection tool used to select indoor units 12A to 12C and outdoor unit 13 of an air conditioner.

[0069] The screen 1100 of the model selection tool in Figure 9 displays the model name of the ventilation device 10 selected by operating the screen 1000 of the model selection tool in Figure 8, and also includes input fields 1102 for the air conditioning load of each room. The screen 1100 of the model selection tool in Figure 9 shows an example where the air conditioning loads of rooms A to C have been entered. When adding more rooms to which air conditioners are to be installed, the operator can add input fields for the room name and air conditioning load to the input field 1102 by pressing the room addition button 1106. After entering the air conditioning loads of rooms A to C in the input field 1102, the operator presses the execute button 1104.

[0070] When the operator presses the execute button 1104, the information processing device, which has a control unit, starts processing the flowchart shown in Figures 5 to 7, selects the indoor units 12A to 12C and the outdoor unit 13 of the air conditioning system in Figure 1, and displays the selection result.

[0071] By operating the screen 1000 of the model selection tool shown in Figure 8 and the screen 1100 of the model selection tool shown in Figure 9, the operator can select a ventilation device 10, indoor units 12A-12C, and outdoor unit 13 that can handle the peak air conditioning load of rooms A-C, taking into account the reduction of the air conditioning load by the ventilation device 10 in the air conditioning system shown in Figure 1, thereby reducing initial costs and improving energy efficiency.

[0072] [Effect] This embodiment is an air conditioner selection method in which the control unit of an information processing device selects an air conditioner, in which indoor units 12A to 12C of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned are provisionally selected, an outdoor unit 13 of the air conditioner is selected based on the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C, and indoor units are re-selected so that the sum of the air conditioning capacities of the indoor units 12A to 12C is greater than the capacity of indoor units that can be connected to the selected outdoor unit 13.

[0073] In this embodiment, indoor units 12A to 12C of the air conditioner are provisionally selected to handle the air conditioning load of the space to be air-conditioned, and the outdoor unit 13 of the air conditioner is selected based on the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C. Furthermore, in this embodiment, indoor units are re-selected within the capacity of indoor units that can be connected to the selected outdoor unit 13 so that the sum of the air conditioning capacities of indoor units 12A to 12C becomes larger.

[0074] Thus, in this embodiment, by re-selecting the indoor units so that the sum of the air conditioning capacities of the indoor units 12A to 12C is greater within the capacity of the indoor units that can be connected to the selected outdoor unit 13, it is possible to select an appropriate air conditioner that reduces initial costs and improves energy efficiency.

[0075] Furthermore, in this embodiment, when re-selecting indoor units 12A to 12C, priority is given to re-selecting models that provide a greater airflow for indoor units 12A to 12C.

[0076] In this embodiment, when selecting indoor units 12A to 12C again, prioritizing the selection of models with a larger airflow makes it possible to set a higher target evaporation temperature during cooling, thereby improving the efficiency of the air conditioner and enhancing energy-saving effects. Furthermore, in this embodiment, when selecting indoor units 12A to 12C again, prioritizing the selection of models with a larger airflow makes it possible to set a lower target condensation temperature during heating, thereby improving the efficiency of the air conditioner and enhancing energy-saving effects.

[0077] Furthermore, in this embodiment, when re-selecting indoor units 12A to 12C, priority is given to re-selecting indoor units 12A to 12C that are installed in air-conditioned spaces with a large air conditioning load.

[0078] In this embodiment, when re-selecting indoor units 12A to 12C, the indoor units 12A to 12C can be selected so that air-conditioned spaces with a large air conditioning load are given priority.

[0079] Furthermore, in this embodiment, the first air conditioning load and the required ventilation volume of the air-conditioned space are obtained when the supply air is treated to a constant temperature and humidity condition in relation to the outside temperature and humidity conditions at the peak air conditioning load of the air-conditioned space. A ventilation device 10 capable of handling the first air conditioning load and the required ventilation volume is selected. The second air conditioning load is calculated by subtracting the first air conditioning load from the peak air conditioning load of the air-conditioned space, and indoor units 12A to 12C of the air conditioner capable of handling the second air conditioning load are provisionally selected.

[0080] In this embodiment, the first air conditioning load and the required ventilation volume for the air-conditioned space are obtained when the supply air is treated to a constant temperature and humidity condition in relation to the outside temperature and humidity conditions at the peak air conditioning load of the air-conditioned space, and a ventilation device 10 capable of handling the first air conditioning load and the required ventilation volume is selected. In addition, in this embodiment, the second air conditioning load is calculated by subtracting the first air conditioning load from the peak air conditioning load of the air-conditioned space, and indoor units 12A to 12C of the air conditioner capable of handling the second air conditioning load are provisionally selected.

[0081] Thus, in this embodiment, by appropriately selecting the ventilation device 10, indoor units 12A to 12C, and outdoor unit 13 that can share and process the peak air conditioning load of the air-conditioned space, taking into consideration the reduction of the air conditioning load by the ventilation device 10, it is possible to reduce initial costs and improve energy efficiency.

[0082] Furthermore, in this embodiment, when selecting the outdoor unit 13, the outdoor unit 13 is selected such that its rated air conditioning capacity is greater than the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C. When re-selecting the indoor units 12A to 12C, the indoor units 12A to 12C are re-selected such that the sum of their air conditioning capacities is less than the capacity of the indoor units that can be connected to the outdoor unit 13.

[0083] In this embodiment, when selecting the outdoor unit 13, the outdoor unit 13 is selected such that its rated air conditioning capacity (nominal air conditioning capacity) is greater than the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C. Furthermore, in this embodiment, when re-selecting the indoor units 12A to 12C, the indoor units 12A to 12C are re-selected such that their sum of air conditioning capacities is greater than the capacity of the indoor units that can be connected to the outdoor unit 13 (the allowable connection capacity of the outdoor unit 13), within a range where the sum of the air conditioning capacities of the indoor units 12A to 12C is not greater than the sum of the air conditioning capacities of the indoor units 12A to 12C.

[0084] Thus, in this embodiment, an air conditioner selection method can be realized that appropriately selects air conditioners to improve energy efficiency.

[0085] Furthermore, this embodiment is a program that causes the control unit of the information processing device to provisionally select indoor units 12A to 12C of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned, select an outdoor unit 13 of the air conditioner based on the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C, and then re-select indoor units 12A to 12C so that the sum of the air conditioning capacities of the indoor units 12A to 12C is greater than the capacity of the indoor units that can be connected to the selected outdoor unit 13.

[0086] Thus, in this embodiment, we can provide a program that causes the control unit to re-select indoor units 12A to 12C so that their capacity is larger within the capacity of indoor units that can be connected to the selected outdoor unit 13.

[0087] Furthermore, this embodiment is an information processing device having a control unit, the control unit provisionally selects indoor units 12A to 12C of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned, selects an outdoor unit 13 of the air conditioner based on the sum of the air conditioning capacities of the provisionally selected indoor units 12A to 12C, and re-selects the indoor units 12A to 12C so that the sum of the air conditioning capacities of the indoor units 12A to 12C is greater than the capacity of the indoor units that can be connected to the selected outdoor unit 13.

[0088] Thus, in this embodiment, it is possible to provide an information processing device that re-selects indoor units 12A to 12C to be larger within the capacity of indoor units that can be connected to the selected outdoor unit 13.

[0089] As described above, this embodiment can be understood to be capable of various modifications to its form and details without departing from the spirit and scope of the claims. [Explanation of symbols]

[0090] 10 Ventilation system 12A~12C indoor unit 13 Outdoor unit 14 Controllers 506 CPU

Claims

1. A method for selecting an air conditioner in which the control unit of an information processing device selects an air conditioner, A provisional selection is made for the indoor unit of the air conditioner capable of handling the air conditioning load of the space to be air-conditioned. Based on the sum of the air conditioning capacities of the provisionally selected indoor units, the outdoor unit of the air conditioner is selected. The indoor units are re-selected so that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit. How to select an air conditioner.

2. When re-selecting the aforementioned indoor unit, priority will be given to selecting a model that provides a greater airflow. The method for selecting an air conditioner according to claim 1.

3. When re-selecting the indoor unit, priority will be given to re-selecting the model of the indoor unit to be installed in the air-conditioned space where the air conditioning load is large. The method for selecting an air conditioner according to claim 1 or 2.

4. The first air conditioning load and the required ventilation rate for the air-conditioned space are obtained when the supply air is treated to a constant temperature and humidity condition in relation to the outside temperature and humidity conditions at the peak air conditioning load of the air-conditioned space. A ventilation system capable of handling the first air conditioning load and the required ventilation volume is selected. The second air conditioning load is calculated by subtracting the first air conditioning load from the peak air conditioning load of the air-conditioned space. A provisional selection is made for the indoor unit of the air conditioner capable of handling the second air conditioning load. The method for selecting an air conditioner according to claim 1 or 2.

5. When selecting the outdoor unit, the outdoor unit is selected such that its rated air conditioning capacity is greater than the sum of the air conditioning capacities of the provisionally selected indoor units. When re-selecting the indoor units, the indoor units are selected such that the sum of the air conditioning capacities of the indoor units is less than the capacity of the indoor units that can be connected to the outdoor unit. The method for selecting an air conditioner according to claim 1 or 2.

6. The control unit of the information processing device has We provisionally select an indoor unit of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned. Based on the sum of the air conditioning capacities of the provisionally selected indoor units, the outdoor unit of the air conditioner is selected. The indoor units are re-selected so that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit. A program that executes a process.

7. An information processing device having a control unit, The control unit, We provisionally select an indoor unit of an air conditioner capable of handling the air conditioning load of the space to be air-conditioned. Based on the sum of the air conditioning capacities of the provisionally selected indoor units, the outdoor unit of the air conditioner is selected. The indoor units are re-selected so that the sum of the air conditioning capacities of the indoor units is greater than the capacity of the indoor units that can be connected to the selected outdoor unit. Information processing device.

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