Air conditioning design support system, air conditioning design support method, and program

Abstract

This disclosure provides an air conditioning setting support system that assists in determining whether or not it is necessary to install a refrigerant leakage prevention device in the space below the ceiling to prepare for refrigerant leakage from air conditioning equipment that may occur in the ceiling space of a building. [Solution] The air conditioning design support system of the present disclosure includes: a refrigerant leakage location recognition unit that recognizes locations where refrigerant leakage is expected when the refrigerant piping of an air conditioning system is installed in the ceiling space of a building; a first opening presence / absence recognition unit that recognizes whether or not there is a first opening on the ceiling surface of a first space below the refrigerant leakage location; a first space volume recognition unit that recognizes the volume of the first space; a refrigerant leakage countermeasure necessity determination unit that, when the first opening presence / absence recognition unit recognizes the presence of a first opening, determines whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used by the air conditioning system and the volume of the first space; and a determination result output unit that outputs the determination result of the refrigerant leakage countermeasure necessity determination unit.

Description

Technical Field

[0001] The present disclosure relates to an air conditioning design support system, an air conditioning design support method, and a program.

Background Art

[0002] Patent Document 1 discloses an installation support system for an air conditioning apparatus that determines whether or not to install a safety device for countermeasures against refrigerant leakage from the air conditioning apparatus. The installation support system for an air conditioning apparatus disclosed in Patent Document 1 determines whether or not to install the safety device based on the amount of refrigerant used in the air conditioning apparatus, the volumes of a first room forming the air conditioning target space and a second room adjacent to the first room, and information on an opening connecting the first room and the second room.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present disclosure provides an air conditioning setting support system, an air conditioning design support method, and a program that support the determination of whether or not there is a need to install a refrigerant leakage response device in the space below the ceiling plenum, in preparation for refrigerant leakage from an air conditioning apparatus that may occur in the ceiling plenum of a building.

Means for Solving the Problems

[0005] The air conditioning design support system in this disclosure is an air conditioning design support system that supports the design of installation methods for air conditioning equipment that uses a refrigerant with a specific gravity greater than air in a building, and comprises: a refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning equipment; a refrigerant leakage assumption location recognition unit that recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping of the air conditioning equipment is assumed to occur when the refrigerant piping of the air conditioning equipment is installed in the ceiling space of the building; a first opening presence / absence recognition unit that recognizes whether or not there is a first opening connecting the first space and the ceiling space on the ceiling surface of a first space formed below the refrigerant leakage assumption location in the ceiling space and surrounded by a wall; a first space volume recognition unit that recognizes the volume of the first space; a refrigerant leakage countermeasure necessity determination unit that determines whether or not it is necessary to provide a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the first space volume when the first opening presence / absence recognition unit recognizes that the first opening is present; and a determination result output unit that outputs the determination result from the refrigerant leakage countermeasure necessity determination unit.

[0006] The air conditioning design support method in this disclosure is a computer-operated air conditioning design support method for supporting the design of installation configurations in a building for an air conditioning system that uses a refrigerant with a specific gravity greater than that of air, comprising: a refrigerant usage amount recognition step for recognizing the amount of refrigerant used by the air conditioning system; a refrigerant leakage location recognition step for recognizing a location in the ceiling space where it is assumed that refrigerant leakage may occur from the refrigerant piping when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building; and a location formed below the location in the ceiling space where the refrigerant leakage is assumed to occur and surrounded by a wall. The method includes: a first opening presence / absence recognition step for recognizing whether or not there is a first opening in the ceiling surface of the first space that connects the first space and the space above the ceiling; a first space volume recognition step for recognizing the volume of the first space; a refrigerant leakage countermeasure necessity determination step for determining whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the volume of the first space when the presence / absence recognition step recognizes that the first opening is present; and a determination result output step for outputting the determination result obtained in the refrigerant leakage countermeasure necessity determination step.

[0007] The program in this disclosure provides a computer to assist in designing installation methods for air conditioning systems that use a refrigerant with a specific gravity greater than air, by providing a computer that includes: a refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning system; a refrigerant leakage location recognition unit that recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping is expected to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building; a first opening presence / absence recognition unit that recognizes whether or not there is a first opening connecting the first space and the ceiling space on the ceiling surface of a first space formed below the expected refrigerant leakage location in the ceiling space and surrounded by a wall; a first space volume recognition unit that recognizes the volume of the first space; a refrigerant leakage countermeasure necessity determination unit that, when the first opening presence / absence recognition unit recognizes the presence of the first opening, determines whether or not it is necessary to provide a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the first space volume; and a determination result output unit that outputs the determination result from the refrigerant leakage countermeasure necessity determination unit. [Effects of the Invention]

[0008] According to the air conditioning design support system in this disclosure, it is possible to help determine whether or not a refrigerant leak prevention device is necessary in the space below the expected location of refrigerant leakage in refrigerant piping installed in the ceiling space, based on the presence or absence of an opening connecting the space to the ceiling space, the amount of refrigerant used by the air conditioning system, and the volume of the space. [Brief explanation of the drawing]

[0009] [Figure 1] Configuration diagram of the air conditioning design support system in the embodiment [Figure 2] First flowchart of the air conditioning design support process in the embodiment [Figure 3] Second flowchart of the air conditioning design support process in the embodiment [Figure 4] Explanatory diagram of the first design object in the embodiment [Figure 5]Explanatory diagram of the second design target in the embodiment [Figure 6] Explanatory diagram of the third design target in the embodiment [Figure 7] Explanatory diagram of the fourth design target in the embodiment [Figure 8] Explanatory diagram of the fifth design target in the embodiment [Modes for carrying out the invention]

[0010] (Knowledge and other information that formed the basis of this disclosure) At the time the inventors conceived of this disclosure, an air conditioning system installation support system was known that determined whether or not to install a safety device to prevent refrigerant leakage from the air conditioning system, based on the amount of refrigerant used by the air conditioning system, the volumes of the first room and the second room adjacent to the first room that form the space to be air-conditioned, and information on the openings connecting the first room and the second room.

[0011] The above support system determines whether or not a safety device is necessary by considering the volume of the first room, which is the air-conditioned space by the air conditioning unit, and the second room, which is connected to the first room by an opening. However, the above support system does not consider refrigerant that diffuses in the ceiling space due to refrigerant leakage from the air conditioning unit located in the ceiling space. Therefore, spaces located below the ceiling space and connected to the ceiling space by an opening, but without an opening that connects to the air-conditioned space by the air conditioning unit, are not considered when determining whether or not a safety device is necessary. The inventors discovered that this system has the drawback of not being able to appropriately consider the extent of space in which leaked refrigerant diffuses and determine whether or not a safety device is necessary, and in order to solve this problem, the subject of this disclosure has been established. Therefore, this disclosure provides an air conditioning design support system, an air conditioning setting support method, and a program that support the determination of whether or not it is necessary to install a refrigerant-compatible device in the space below the ceiling to deal with refrigerant diffusing in the ceiling space due to refrigerant leakage that may occur in air conditioning equipment located in the ceiling space of a building.

[0012] The embodiments will be described in detail below with reference to the drawings. However, unnecessary details may be omitted. For example, detailed explanations of already well-known matters or redundant explanations of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily verbose and to facilitate understanding for those skilled in the art. The attached drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure and are not intended to limit the subject matter described in the claims.

[0013] (Embodiment) The embodiments will be described below with reference to Figures 1 to 8. [1. Configuration of the HVAC Design Support System] Referring to Figure 1, the configuration of the air conditioning design support system 1 of this embodiment will be described. The air conditioning design support system 1 determines whether or not it is necessary to install a refrigerant leak countermeasure device in order to deal with refrigerant leaks that may occur in the refrigerant piping 123 of the air conditioning system 120 installed in the building 100, which is the subject of the air conditioning design, and outputs the determination result.

[0014] The building 100 may be a completed building, a building under construction, or a building scheduled to be built. The air conditioning system 120 includes refrigerant piping 123 located in the ceiling space 101 of the building 100, and an outdoor unit 121 and an indoor unit 122 connected by the refrigerant piping 123. The refrigerant piping 123 is a pair of pipes that circulate refrigerant between the outdoor unit 121 and the indoor unit 122. The refrigerant piping 123 is extended midway by a pipe fitting 124.

[0015] Below the attic 101 of the building 100, a first space 111a and a second space 111b surrounded by walls are formed. The first space 111a is formed below the assumed refrigerant leakage point P where the pipe joint 124 is arranged, and the second space 111b is adjacent to the first space 111a. In the ceiling surface 112a of the first space 111a, a first opening 113a that communicates the first space 111a and the attic 101 is formed. In the ceiling surface 112b of the second space 111b, a second opening 113b that communicates the second space 111b and the attic 101 is formed.

[0016] Figure 1 illustrates, as an example of the refrigerant leakage response device, a first alarm 130a and a first ventilator 132a provided in the first space 111a, and a second alarm 130b and a second ventilator 132b provided in the second space 111b. The first alarm 130a and the first ventilator 132a correspond to the first refrigerant leakage response device of the present disclosure, and the second alarm 130b and the second ventilator 132b correspond to the second refrigerant leakage response device of the present disclosure.

[0017] The first alarm 130a includes a refrigerant sensor 131a that detects the refrigerant concentration, and when the concentration detected by the refrigerant sensor 131a reaches an alarm level, it issues a notification of refrigerant leakage and activates the first ventilator 132a. Similarly, the second alarm 130b includes a refrigerant sensor 131b, and when the concentration detected by the refrigerant sensor 131b reaches an alarm level, it issues a notification of refrigerant leakage and activates the second ventilator 132b. The notification of refrigerant leakage includes output of an alarm sound, output of a notification voice, display of a notification screen, and the like. Note that the first refrigerant leakage response device and the second refrigerant leakage response device of the present disclosure may each be provided with only an alarm, or only a ventilator.

[0018] The air conditioning design support system 1 communicates with the designer terminal 50 and the building information server 210 via the communication network 200. The designer terminal 50 is a terminal device equipped with a processor, memory, display 51, and operation unit 52, and is used by designer D, who is designing the air conditioning for building 100. Designer D uses the design support service for building air conditioning design provided by the air conditioning design support system 1 by accessing the design support site operated by the air conditioning design support system 1 via the designer terminal 50.

[0019] The building information server 210 is a server system that includes a processor, memory, communication unit, etc., and is equipped with a building database 211 in which specification information for numerous buildings, including building 100, is recorded.

[0020] The air conditioning design support system 1 is a computer system equipped with a system communication unit 2, a system processor 10, a system memory 20, and the like. The system memory 20 stores a program 21 for controlling the air conditioning design support system 1. The system processor 10 reads and executes the program 21 and functions as a refrigerant usage amount recognition unit 11, a refrigerant leakage location recognition unit 12, a first opening presence / absence recognition unit 13, a first space volume recognition unit 14, a second opening presence / absence recognition unit 15, a second space volume recognition unit 16, an opening ratio recognition unit 17, a refrigerant leakage countermeasure necessity determination unit 18, and a determination result output unit 19. The system processor 10 corresponds to the computer of this disclosure.

[0021] Details of the processing performed by the refrigerant usage amount recognition unit 11, the refrigerant leakage location recognition unit 12, the first opening presence / absence recognition unit 13, the first space volume recognition unit 14, the second opening presence / absence recognition unit 15, the second space volume recognition unit 16, the opening ratio recognition unit 17, the refrigerant leakage countermeasures necessity determination unit 18, and the determination result output unit 19 will be described later.

[0022] The processing performed by the refrigerant usage amount recognition unit 11 corresponds to the refrigerant usage amount recognition step in the air conditioning design support method of this disclosure, and the processing performed by the refrigerant leakage location recognition unit 12 corresponds to the refrigerant leakage location recognition step in the air conditioning design support method of this disclosure. The processing performed by the first opening presence / absence recognition unit 13 corresponds to the first opening presence / absence recognition step in the air conditioning design support method of this disclosure, and the processing performed by the first space volume recognition unit 14 corresponds to the first space volume recognition step in the air conditioning design support method of this disclosure. The processing performed by the refrigerant leakage countermeasure necessity determination unit 18 corresponds to the refrigerant leakage countermeasure necessity determination step in the air conditioning design support method of this disclosure, and the processing performed by the determination result output unit 19 corresponds to the determination result output step in the air conditioning design support method of this disclosure.

[0023] [2. Air Conditioning Design Support Processing] The procedure for the air conditioning design support process for building 100, performed by the air conditioning design support system 1, will be explained according to the flowcharts shown in Figures 2 and 3. When a designer accesses the air conditioning design support site operated by the air conditioning design support system 1 by operating the designer terminal 50 and starts using the design support service, the air conditioning design support system 1 executes the air conditioning design support process according to the flowcharts shown in Figures 2 and 3.

[0024] Steps S1 and S2 in Figure 2 represent processing by the refrigerant usage amount recognition unit 11. In step S1, the refrigerant usage amount recognition unit 11 obtains specification information of the air conditioning system 120 by communicating with the building information server 210 or the designer terminal 50. More specifically, the refrigerant usage amount recognition unit 11 obtains specification information of the air conditioning system 120 installed in building 100 by accessing the building information server 210 and referring to the building DB 211. Alternatively, the refrigerant usage amount recognition unit 11 receives and obtains specification information of the air conditioning system 120 transmitted from the designer terminal 50 in response to the operation of the operation unit 52 by the designer D. In the subsequent step S2, the refrigerant usage amount recognition unit 11 recognizes the amount of refrigerant used by the air conditioning system 120 based on the specification information of the air conditioning system 120.

[0025] The next steps, S3 and S4, are processed by the refrigerant leak location recognition unit 12. In step S3, the refrigerant leak location recognition unit 12 obtains specification information for building 100 by communicating with the building information server 210 or the designer terminal 50. More specifically, the refrigerant leak location recognition unit 12 obtains specification information for building 100 by accessing the building information server 210 and referring to the building DB 211. Alternatively, the refrigerant leak location recognition unit 12 receives and obtains specification information for building 100 transmitted from the designer terminal 50 in response to an operation of the operation unit 52 by the designer D. In the following step S4, the refrigerant leak location recognition unit 12 recognizes the refrigerant leak location P in the ceiling space 101 of building 100 from the construction specifications of the air conditioning system 120 in building 100, which are included in the specification information for building 100.

[0026] The next steps, S5 and S6, are processed by the first opening presence / absence recognition unit 13. In step S5, the first opening presence / absence recognition unit 13 recognizes the presence or absence of a first opening 113a in the ceiling surface 112a of the first space 111a, based on the specifications of the ceiling surface 112a included in the building specification information acquired in step S3. The specifications of the ceiling surface 112a include system ceiling, conventional ceiling, mesh ceiling, skeleton ceiling, etc. The first opening presence / absence recognition unit 13 recognizes the presence of a first opening 113a if the specifications of the ceiling surface 112a are other than those intended to ensure airtightness. In the following step S6, if the first opening presence / absence recognition unit 13 recognizes the presence of a first opening 113a, it proceeds to step S7; if it recognizes the absence of a first opening 113a, it proceeds to step S20.

[0027] Step S20 is a process performed by the refrigerant leak countermeasure necessity determination unit 18. In step S20, the refrigerant leak countermeasure necessity determination unit 18 determines that it is not necessary to install a first refrigerant leak countermeasure device in the first space 111a, and also determines that it is not necessary to install a second refrigerant leak countermeasure device in the second space 111b, and proceeds to step S11. Step S11 is a process performed by the determination result output unit 19. The determination result output unit 19 transmits determination result information indicating the determination result of the refrigerant leak countermeasure necessity determination unit 18 to the designer terminal 50. Upon receiving the determination result information, the designer terminal 50 displays a determination result screen indicating the determination result on the display 51. Designer D can check the determination result screen and decide whether or not to install a first refrigerant countermeasure device in the first space 111a.

[0028] Steps S7 and S8 are processes performed by the second opening presence / absence recognition unit 15. In step S7, the second opening presence / absence recognition unit 15 recognizes the presence or absence of the second opening 113b in the ceiling surface 112b from the specifications of the ceiling surface 112b of the second space 111b, which are included in the building specification information of the building 100 acquired in step S3, similar to the process performed by the first opening presence / absence recognition unit 13 described above. In the subsequent step S8, if the second opening presence / absence recognition unit 15 recognizes that the second opening 113b is present, it proceeds to step S30 in Figure 3, and if it recognizes that the second opening 113b is absent, it proceeds to step S9.

[0029] Step S9 is a process performed by the first space volume recognition unit 14. In step S9, the first space volume recognition unit 14 recognizes the first space volume, which is the volume of the first space 111a, based on the building specification information of the building 100 acquired in step S3. Here, Figure 4 is a simplified explanatory diagram of the layout of the building 100 shown in Figure 1, and arrow A1 indicates the direction in which refrigerant will flow from the first opening 113a on the ceiling surface 112a of the first space 111a to the first space 111a if a refrigerant leak occurs at the assumed refrigerant leak location P. Also, arrow A2 indicates the direction in which refrigerant will flow from the second opening 113b on the ceiling surface 112b of the second space 111b to the second space 111b.

[0030] The first space volume recognition unit 14 determines the height ha from the floor surface to the ceiling surface 112a of the first space 111a as the height of the first space 111a, and calculates the first space volume by multiplying the floor area of ​​the first space 111a by ha. The following step S10 is processing by the refrigerant leak countermeasure necessity determination unit 18. In step S10, the refrigerant leak countermeasure necessity determination unit 18 determines whether or not it is necessary to install a first refrigerant leak countermeasure device in the first space 111a based on the amount of refrigerant used by the air conditioning system 120 and the first space volume, and proceeds to step S11.

[0031] Specifically, the refrigerant leak countermeasure necessity determination unit 18 compares the volume threshold set according to the amount of refrigerant used by the air conditioning system 120 with the first space volume, and determines that it is necessary to install the first refrigerant leak countermeasure device when the first space volume is less than the volume threshold. Conversely, the refrigerant leak countermeasure necessity determination unit 18 determines that it is not necessary to install the first refrigerant leak countermeasure device in the first space 111a when the first space volume is equal to or greater than the volume threshold.

[0032] Step S30 in Figure 3 is a process performed by the first space volume recognition unit 14. In step S30, the first space volume recognition unit 14 recognizes the first space volume by the same process as in step S9 described above. The following step S31 is a process performed by the refrigerant leakage countermeasure necessity determination unit 18. In step S31, the refrigerant leakage countermeasure necessity determination unit 18 determines whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space 111a by the same process as in step S10 described above.

[0033] The next step, S32, is processing by the second space volume recognition unit 16. In step S32, the second space volume recognition unit 16 recognizes the second space volume, which is the volume of the second space 111b, based on the building specification information of the building 100 acquired in step S3, similar to the processing by the first space volume recognition unit 14 in step S9 described above. The second space volume recognition unit 16 takes the height hb from the floor surface to the ceiling surface 112b of the second space 111b shown in Figure 4 as the height of the second space 111b, and calculates the second space volume by multiplying the floor area of ​​the second space 111b by hb.

[0034] The following steps S33 and S34 are processes performed by the opening ratio recognition unit 17. In step S21, the opening ratio recognition unit 17 recognizes the specifications of the ceiling surface 112a of the first space 111a and the ceiling surface 112b of the second space 111b based on the specification information of the building 100 acquired in step S3. Then, based on the specifications of the ceiling surfaces, the opening ratio recognition unit 17 recognizes the first opening ratio, which is the opening ratio of the first opening 113a on the ceiling surface 112a of the first space 111a, and the second opening ratio, which is the opening ratio of the second opening 113b on the ceiling surface 112b of the second space 111b.

[0035] The aperture ratio recognition unit 17 recognizes the first aperture ratio and the second aperture ratio as follows. (a) Small opening ratio (small degree of opening)... System ceiling, conventional ceiling. (b) Large opening ratio (large degree of opening)... Mesh ceiling, skeleton ceiling.

[0036] In the following step S34, the aperture ratio recognition unit 17 compares the first aperture ratio with the second aperture ratio. If the first aperture ratio is greater than or equal to the second aperture ratio, the process proceeds to step S35. If the first aperture ratio is less than the second aperture ratio, the process proceeds to step S35. Steps S35 and S40 are processes performed by the refrigerant leakage countermeasures necessity determination unit 18.

[0037] Step S35 is the process for when the first opening ratio and the second opening ratio are approximately the same or the first opening ratio is greater than the second opening ratio. In step S35, the refrigerant leakage countermeasure necessity determination unit 18 determines whether or not it is necessary to install a second refrigerant leakage countermeasure device in the second space 111b based on the amount of refrigerant used by the air conditioner 120 and the total volume of the first space volume and the second space volume, and proceeds to step S11 in Figure 2. The refrigerant leakage countermeasure necessity determination unit 18 compares the above-mentioned volume threshold with the total volume of the first space volume and the second space volume, and determines that it is necessary to install a second refrigerant leakage countermeasure device in the second space 111b if the total volume is less than the volume threshold. The refrigerant leakage countermeasure necessity determination unit 18 determines that it is not necessary to install a second refrigerant leakage countermeasure device in the second space 111b if the total volume is equal to or greater than the volume threshold.

[0038] As shown in Figure 4, if the opening ratio of the first opening 113a on the ceiling surface 112a of the first space 111a is similar to that of the second opening 113b on the ceiling surface 112b of the second space 111b, then when a refrigerant leak occurs at the assumed leak location P, the leaked refrigerant is expected to diffuse more easily into the first space 111a, which has a larger opening ratio, than into the second space 111b, which has a smaller opening ratio. Therefore, it is expected that a more appropriate determination can be made by determining whether or not it is necessary to install a second refrigerant leak response device in the second space 111b, based on the total volume of the first space and the second space.

[0039] Step S40 is the process for when the second opening ratio is greater than the first opening ratio. In step S40, the refrigerant leakage countermeasure necessity determination unit 18 determines whether or not it is necessary to install a second refrigerant leakage countermeasure device in the second space 111b based on the amount of refrigerant used by the air conditioner 120 and the second space volume, and proceeds to step S11 in Figure 2. The refrigerant leakage countermeasure necessity determination unit 18 compares the volume threshold described above with the second space volume and determines that it is necessary to install a second refrigerant leakage countermeasure device in the second space 111b when the second space volume is less than the volume threshold. The refrigerant leakage countermeasure necessity determination unit 18 also determines that it is not necessary to install a second refrigerant leakage countermeasure device in the second space 111b when the second space volume is equal to or greater than the volume threshold.

[0040] Here, Figures 5 and 6 illustrate the case where the opening ratio of the second opening 113b on the ceiling surface 112b of the second space 111b is greater than the opening ratio of the first opening 113a on the ceiling surface 112a of the first space 111a. Figure 5 shows, for example, the case where the ceiling surface 112a of the first space 111a is a system ceiling and the ceiling surface 112b of the second space 111b is a mesh ceiling. Also, Figure 5 shows, for example, the case where the ceiling surface 112a of the first space 111a is a system ceiling and the ceiling surface 112b of the second space 111b is a skeleton ceiling.

[0041] As shown in the examples in Figures 5 and 6, when the second opening ratio is larger than the first opening ratio, it is difficult to determine whether the leaked refrigerant will diffuse more easily into the first space 111a or the second space 111b when a refrigerant leak occurs at the assumed leak location P. Therefore, it is expected that a more appropriate determination can be made by determining whether or not it is necessary to install a second refrigerant-compatible device in the second space 111b based on the volume of the second space.

[0042] As shown in Figure 6, if the ceiling surface 112b of the second space 111b is a skeleton ceiling, the second space volume recognition unit 16 calculates the volume of the second space by setting the height hb of the second space 111b to be the same as the height ha of the adjacent first space 111a. Also, as shown in Figure 7, if the ceiling surface 112a of the first space 111a is a skeleton ceiling, the first space volume recognition unit 14 calculates the volume of the first space by setting the length from the floor surface of the first space 111a to the assumed refrigerant leakage point P (location of the pipe joint 124) as the height ha of the first space 111a.

[0043] [3. Effects, etc.] As described above, in this embodiment, the air conditioning design support system 1 determines whether or not it is necessary to install a first refrigerant-responding device in the first space 111a formed below the assumed refrigerant leakage point P, in order to prepare for refrigerant leakage that may occur in the refrigerant piping 123 located in the ceiling space 101 of the building 100, based on the amount of refrigerant used by the air conditioning unit 120 and the volume of the first space 111a, and outputs the determination result. This supports the designer D in deciding whether or not to install a first refrigerant leakage-responding device in the first space 111a of the building 100.

[0044] (Other embodiments) As described above, the above embodiments have been explained as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited to these embodiments and can be applied to embodiments that have been modified, replaced, added, or omitted. Therefore, other embodiments will be illustrated below.

[0045] In the above embodiment, the first space 111a and the second space 111b, formed below the ceiling space 101 of the building 100, were targeted, and it was determined whether or not it was necessary to install a refrigerant leak prevention device in each space. In another embodiment, as shown in Figure 8, three or more spaces may be targeted, and it may be determined whether or not it was necessary to install a refrigerant leak prevention device in each space. In Figure 8, the second space 111b and the third space 111c are adjacent to the right of the first space 111a, and the fourth space is adjacent to the left of the first space 111a. In Figure 8, the third opening 113c is shown on the ceiling surface 112c of the third space 111c, and the fourth opening 113d is shown on the ceiling surface 112d of the fourth space 111d. Furthermore, the direction of refrigerant diffusion from the ceiling space 101 to the third space 111c is indicated by arrow A3, and the direction of refrigerant diffusion from the ceiling space 101 to the fourth space 111d is indicated by arrow A4.

[0046] In this case, the refrigerant leakage countermeasures necessity determination unit 18 determines whether or not it is necessary to install a refrigerant leakage countermeasure device in each space, as follows. First space 111a... The need to install a refrigerant leakage prevention device is determined by whether the volume of the first space 111a is equal to or greater than a threshold volume corresponding to the amount of refrigerant used by the air conditioning system 120. Second space 111b…The total volume of the first space 111a and the second space 111b is determined to determine whether or not it is necessary to install a refrigerant leakage prevention device based on whether or not the total volume of the first space 111a and the second space 111b is equal to or greater than a threshold volume corresponding to the amount of refrigerant used by the air conditioning system 120. Third space 111c... Whether or not a refrigerant leakage prevention device is necessary is determined by whether or not the total volume of the first space 111a, the second space 111b, and the third space 111c is equal to or greater than a threshold volume corresponding to the amount of refrigerant used by the air conditioning system 120. The fourth space 111d…The total volume of the first space 111a and the fourth space 111d is determined to determine whether or not a refrigerant leakage prevention device is to be installed based on whether or not the total volume of the first space 111a and the fourth space 111d is equal to or greater than a threshold volume corresponding to the amount of refrigerant used by the air conditioning unit 120.

[0047] In the output of the determination result by the determination result output unit in the above embodiment, the following output may be performed. Output Example 1…In step S10 in Figure 2, step S22 in Figure 3, and step S24 in Figure 3, when it is determined that a refrigerant leak detection device needs to be installed in the space to be judged, the system may recognize whether or not an indoor unit is installed in the space to be judged and send judgment result information to the designer terminal 50 that distinguishes between cases where an indoor unit is installed and cases where it is not. As a result, when the designer terminal 50 receives the judgment result information and determines that a refrigerant leak detection device needs to be installed in a space where an indoor unit is not installed, it can display a screen with a different display mode than when it is determined that a refrigerant leak detection device needs to be installed in a space where an indoor unit is installed, thereby prompting the designer terminal 50 to install a refrigerant leak detection device in a space where an indoor unit is not installed.

[0048] In the output of the determination result by the determination result output unit 19 in the above embodiment, the following output may be performed. When the refrigerant leak countermeasure necessity determination unit determines that a first refrigerant leak countermeasure device is necessary in the first space 111a, and if an indoor unit is not installed in the first space 111a, information recommending that the pipe joint 124 of the refrigerant piping 123, which is the assumed refrigerant leak location P, be a mechanical joint that meets a predetermined standard is sent to the designer terminal 50. This allows the display 51 of the designer terminal 50 to display a screen recommending the use of a mechanical joint, thereby encouraging the designer D to adopt a mechanical joint.

[0049] In the output of the determination result by the determination result output unit 19 in the above embodiment, the following output may be performed. If the refrigerant leak countermeasure necessity determination unit 18 determines that it is necessary to install a first refrigerant leak countermeasure device in the first space 111a, and no indoor unit is installed in the first space 111a, then refrigerant leak countermeasure cost information is transmitted to the designer terminal 50, comparing the necessary cost of installing the first refrigerant leak countermeasure device in the first space 111a with the necessary cost of adopting a mechanical joint that meets predetermined standards as the pipe joint 124 of the refrigerant piping 123, which is the assumed location P of the refrigerant leak. This allows the designer D to compare and consider the costs of adopting the first refrigerant leak countermeasure device and a mechanical joint that meets predetermined standards by displaying a screen comparing the costs on the display 51 of the designer terminal 50.

[0050] In the above embodiment, the air conditioning design support system of this disclosure is configured by an air conditioning design support system 1 connected to a designer terminal 50 via a communication network 200. In another embodiment, the air conditioning design support system of this disclosure may be configured by a designer terminal 50. In this case, the designer terminal 50 executes an application program for air conditioning design support installed on the designer terminal 50, thereby realizing the same functions as those of the system processor 10 shown in Figure 1.

[0051] The controller constituting the air conditioning design support system in this disclosure only needs to be capable of controlling the operation of the air conditioning design support system in this disclosure. When expressing the subject matter of the invention, the controller may be described as a control means, a control unit, or similar terminology in addition to "controller." The controller can be implemented in various forms. For example, a processor may be used as the controller. If a processor is used as the controller, it is possible to load a program from a storage medium containing the program into the processor and execute the program using the processor to perform various processes. Therefore, since the processing content can be changed by changing the program stored in the storage medium, the degree of freedom in changing the control content can be increased. Examples of processors include CPUs (Central Processing Units) and MPUs (Micro-Processing Units). Examples of storage mediums include hard disks, flash memory, and optical discs. Furthermore, a wired logic controller that cannot be rewritten may be used as the controller. Using a wired logic controller is effective in improving processing speed. Examples of wired logic include ASICs (Application Specific Integrated Circuits). Furthermore, the controller may be implemented by combining a processor and wired logic. Implementing the controller by combining a processor and wired logic increases the flexibility of software design while improving processing speed. Alternatively, the controller and a circuit with a different function may be constructed from a single semiconductor element. An example of a circuit with a different function is an A / D-D / A conversion circuit. The controller may also be constructed from a single semiconductor element or from multiple semiconductor elements. When constructed from multiple semiconductor elements, each control described in the claims may be implemented from different semiconductor elements. Furthermore, the controller may be configured with a configuration including semiconductor elements and passive components such as resistors or capacitors.

[0052] The communicator provided in the air conditioning design support system in this disclosure only needs to enable communication between the air conditioning design support system in this disclosure and external equipment, and communication between the components of the air conditioning design support system. When expressing the subject matter of the invention, in addition to the communicator, the communication means or communication unit or transmitting / receiving means or transmitting / receiving unit or similar terminology may be used to describe the means that enables communication between the air conditioning design support system in this disclosure and external equipment, and communication between the components constituting the air conditioning design support system. The communicator can be implemented in various forms. Examples of a communicator include wireless connection to external equipment via a base station, or direct wireless connection to external equipment. Examples of wireless connection to external equipment via a base station include IEEE 802.11 compliant wireless LAN that wirelessly communicates with a WiFi® router, third-generation mobile communication systems (commonly known as 3G), fourth-generation mobile communication systems (commonly known as 4G), IEEE 802.16 compliant WiMax (registered trademark), or LPWA (Low Power Wide Area). Using a communicator that directly wirelessly connects the device disclosed herein with external devices is effective in improving the security of communications, and the device disclosed herein can communicate with external devices even in locations where relay devices such as Wi-Fi routers are not present. Examples of communicators that directly wirelessly connect the device disclosed herein with external devices include Bluetooth communication, NFC (Near Field Communication) communication via a loop antenna, or infrared communication.

[0053] Since the embodiments described above are for illustrative purposes of the technology described herein, various modifications, substitutions, additions, omissions, etc., can be made within the scope of the claims or equivalents thereof.

[0054] (Note) Based on the above description of embodiments, the following technologies are disclosed.

[0055] (Technology 1) An air conditioning design support system that assists in designing the installation method of an air conditioning system that uses a refrigerant with a specific gravity greater than that of air, comprising: a refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning system; a refrigerant leakage assumption location recognition unit that recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping of the air conditioning system is assumed to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building; a first opening presence / absence recognition unit that recognizes whether or not there is a first opening connecting the first space and the ceiling space on the ceiling surface of a first space formed below the refrigerant leakage assumption location in the ceiling space and surrounded by a wall; a first space volume recognition unit that recognizes the volume of the first space; a refrigerant leakage countermeasure necessity determination unit that determines whether or not it is necessary to provide a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the first space volume when the first opening presence / absence recognition unit recognizes that the first opening is present; and a determination result output unit that outputs the determination result from the refrigerant leakage countermeasure necessity determination unit. This configuration allows for the determination of whether or not a refrigerant leak prevention device is necessary in the space below the suspected location of refrigerant leakage in the refrigerant piping installed in the ceiling space, based on the presence or absence of an opening connecting the space to the ceiling space, the amount of refrigerant used by the air conditioning system, and the volume of the space.

[0056] (Technology 2) An air conditioning design support system according to Technology 1, comprising: a second opening presence / absence recognition unit that recognizes whether or not there is a second opening connecting the second space and the ceiling space on the ceiling surface of a second space formed below the ceiling space and surrounded by a wall; and a second space volume recognition unit that recognizes the volume of the second space, wherein the refrigerant leakage countermeasure necessity determination unit determines whether or not it is necessary to install the first refrigerant leakage countermeasure device in the first space, and when the second opening presence / absence recognition unit recognizes that the second opening is present, it determines whether or not it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the first space volume and the second space volume. This configuration helps determine whether or not it is necessary to install a second refrigerant-compatible device in the second space, which is connected to the first space via the ceiling space and where refrigerant leaking from the refrigerant piping may diffuse.

[0057] (Technology 3) The air conditioning design support system according to Technology 2, wherein the refrigerant leakage countermeasure necessity determination unit determines that it is not necessary to install the first refrigerant leakage countermeasure device in the first space, and then determines that it is not necessary to install the second refrigerant leakage countermeasure device in the second space. With this configuration, since the first space is formed below the expected location of refrigerant leakage, if it is determined that there is no need to install a first refrigerant leakage response device in the first space, where it is predicted that leaked refrigerant will diffuse more easily than in the second space, then it can be efficiently determined that there is no need to install a second refrigerant leakage response device in the second space either.

[0058] (Technical 4) An air conditioning design support system according to Technical 2 or Technical 3, comprising an opening ratio recognition unit that recognizes a first opening ratio, which is the opening ratio of the first opening in the first space, and a second opening ratio, which is the opening ratio of the two openings in the second space, wherein the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space, and when the second opening presence / absence recognition unit recognizes that the second opening is present, it switches between determining whether it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the first space volume and the second space volume, according to the degree of difference between the first opening ratio and the second opening ratio, and determining whether it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the second space volume. With this configuration, it is possible to determine whether or not it is necessary to install a second refrigerant leak response device in the second space, depending on the degree of difference between the first and second opening ratios, and the manner in which the refrigerant diffuses into the first and second spaces when a refrigerant leak occurs at a location where a refrigerant leak is assumed.

[0059] (Technical 5) The air conditioning design support system according to Technical 4, wherein the opening ratio recognition unit recognizes the first opening ratio according to the specifications of the ceiling surface of the first space and recognizes the second opening ratio according to the specifications of the ceiling surface of the second space. This configuration allows for the recognition of the first and second opening ratios according to the specifications of the ceiling surface, such as system ceilings, conventional ceilings, mesh ceilings, and skeleton ceilings.

[0060] (Technology 6) An air conditioning design support system according to any one of the technologies from Technology 1 to Technology 5, wherein the determination result output unit outputs the determination result in a manner that distinguishes between the case in which the indoor unit of the air conditioning system is installed in the first space and the case in which the indoor unit is not installed in the first space, when the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space. With this configuration, information can be output regarding whether or not an indoor unit is installed in the first space where it has been determined that a first refrigerant leak response device is required.

[0061] (Technology 7) An air conditioning design support system according to any one of the technologies from Technology 1 to Technology 6, wherein the determination result output unit outputs information recommending that the pipe joints of the refrigerant piping that are assumed to be refrigerant leakage locations be mechanical joints that meet predetermined standards when the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space, and when the indoor unit of the air conditioning system is not installed in the first space. With this configuration, since no indoor unit is installed in the first space, it is assumed that users do not frequently enter or exit the first space, making it difficult to detect refrigerant leaks. In such cases, the reliability against refrigerant leaks can be enhanced by recommending the use of mechanical joints that meet the prescribed standards.

[0062] (Technology 8) An air conditioning design support system described in any one of the technologies from Technology 1 to Technology 7, wherein the determination result output unit outputs refrigerant leakage countermeasure cost information comparing the necessary cost of installing the first refrigerant leakage countermeasure device in the first space with the necessary cost of adopting a mechanical joint that meets a predetermined standard as the pipe joint of the refrigerant piping that is the assumed location of the refrigerant leakage, when the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space and the indoor unit is not installed in the first space. This configuration makes it easier to compare the costs required when it is determined that a first refrigerant leak prevention device is necessary in the first space, and when it is determined that a first refrigerant leak prevention device is necessary in the first space, with the costs required when a mechanical joint that meets the prescribed standards is adopted, thereby supporting the decision of which of the two to adopt.

[0063] (Technology 9) A computer-based air conditioning design support method for assisting in the design of installation configurations for air conditioning systems that use a refrigerant with a specific gravity greater than air, comprising: a refrigerant usage amount recognition step for recognizing the amount of refrigerant used by the air conditioning system; a refrigerant leakage location recognition step for recognizing a location in the ceiling space where it is assumed that refrigerant leakage may occur from the refrigerant piping when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building; and a first space formed below the refrigerant leakage location in the ceiling space and enclosed by a wall surface. A method for supporting air conditioning design, comprising: a first opening presence / absence recognition step for recognizing whether or not there is a first opening connecting the first space and the space above the ceiling; a first space volume recognition step for recognizing the volume of the first space; a refrigerant leakage countermeasure necessity determination step for determining whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the volume of the first space when the presence / absence recognition step recognizes that the first opening is present; and a determination result output step for outputting the determination result obtained in the refrigerant leakage countermeasure necessity determination step. By executing the air conditioning design support method of Technology 9 using a computer, the same effects and benefits as the air conditioning design support system of Technology 1 can be obtained.

[0064] (Technical 10) A program that enables a computer to function as a refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning system; a refrigerant leakage assumption location recognition unit that recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping is expected to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building; a first opening presence / absence recognition unit that recognizes whether or not there is a first opening connecting the first space and the ceiling space on the ceiling surface of a first space formed below the expected refrigerant leakage assumption location in the ceiling space and surrounded by a wall; a first space volume recognition unit that recognizes the volume of the first space; a refrigerant leakage countermeasure necessity determination unit that determines whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the first space volume when the first opening presence / absence recognition unit recognizes the presence of the first opening; and a determination result output unit that outputs the determination result from the refrigerant leakage countermeasure necessity determination unit. By executing the program of Technology 10 on a computer, the configuration of the air conditioning design support system of Technology 1 can be realized. [Industrial applicability]

[0065] This disclosure is applicable to assisting in determining whether or not it is necessary to install a refrigerant leak detection device in the space below the ceiling to protect against refrigerant leaks that may occur in refrigerant piping located in the ceiling space of a building. [Explanation of Symbols]

[0066] 1. Air Conditioning Design Support System 2. System Communications Department 10 System Processors 11 Used refrigerant amount recognition unit 12. Refrigerant leak location recognition unit 13 First opening recognition section 14 1st spatial volume recognition section 15 2nd opening presence / absence recognition section 16 Second spatial volume recognition section 17 Aperture ratio recognition section 18. Refrigerant Leakage Countermeasure Necessity Determination Unit 19. Output section for judgment results 20 System Memory 21 Programs 50 Designer terminals 51 displays 52 Operation section 100 buildings 101 Attic 111a 1st space 111b 2nd space 112a Ceiling surface of the first space 112b Ceiling surface of the second space 113a 1st opening 113b 2nd opening 120 Air conditioning system 121 Outdoor unit 122 Indoor unit 123 Refrigerant Piping 124 Pipe fittings 130a 1st alarm 131a Refrigerant Sensor 132a First ventilation system 130b 2nd alarm 131b Refrigerant sensor 132b Second ventilation system 200 Communication Networks 210 Building Information Server 211 Building Database P Expected location of refrigerant leak D Designer

Claims

1. An air conditioning design support system that assists in designing the installation methods of air conditioning systems in buildings that use refrigerants with a specific gravity greater than air, A refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning system, A refrigerant leakage location recognition unit recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping of the air conditioning system is expected to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building, A first opening presence / absence recognition unit recognizes whether or not there is a first opening connecting the first space and the ceiling space in the ceiling surface of the first space which is formed below the suspected location of refrigerant leakage in the ceiling space and is surrounded by a wall, A first space volume recognition unit recognizes the volume of the first space, which is the volume of the first space, When the presence or absence of the first opening is recognized as being present by the first opening presence / absence recognition unit, a refrigerant leakage countermeasure necessity determination unit determines whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the volume of the first space, The system includes a determination result output unit that outputs the determination result from the refrigerant leak countermeasure necessity determination unit. Air conditioning design support system.

2. A second opening presence / absence recognition unit recognizes whether or not there is a second opening connecting the second space and the ceiling space in the ceiling surface of the second space, which is formed below the ceiling space and surrounded by walls, A second space volume recognition unit recognizes the volume of the second space, which is the volume of the second space, Equipped with, The refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space, and if the second opening presence / absence recognition unit recognizes that the second opening is present, it determines whether it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the first space volume and the second space volume. The air conditioning design support system according to claim 1.

3. If the refrigerant leakage countermeasures necessity determination unit determines that it is not necessary to install the first refrigerant leakage countermeasure device in the first space, it determines that it is not necessary to install the second refrigerant leakage countermeasure device in the second space. The air conditioning design support system according to claim 2.

4. The system includes an opening ratio recognition unit that recognizes a first opening ratio, which is the opening ratio of the first opening in the first space, and a second opening ratio, which is the opening ratio of the two openings in the second space. The refrigerant leakage countermeasure necessity determination unit, when it determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space and the second opening presence / absence recognition unit recognizes the presence of the second opening, switches between determining whether it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the first and second spaces, according to the degree of difference between the first and second opening ratios, and determining whether it is necessary to install the second refrigerant leakage countermeasure device in the second space based on the amount of refrigerant used and the total volume of the second space. The air conditioning design support system according to claim 2 or claim 3.

5. The opening ratio recognition unit recognizes the first opening ratio according to the specifications of the ceiling surface of the first space, and recognizes the second opening ratio according to the specifications of the ceiling surface of the second space. The air conditioning design support system according to claim 4.

6. The determination result output unit outputs the determination result in a manner that distinguishes between the case where the indoor unit of the air conditioner is installed in the first space and the case where the indoor unit is not installed in the first space, when the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space. An air conditioning design support system according to any one of claims 1 to 3.

7. When the refrigerant leakage countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leakage countermeasure device in the first space, and the indoor unit of the air conditioning system is not installed in the first space, the determination result output unit outputs information recommending that the pipe joints of the refrigerant piping, which are the assumed locations for refrigerant leakage, be mechanical joints that meet predetermined standards. An air conditioning design support system according to any one of claims 1 to 3.

8. The judgment result output unit outputs refrigerant leak countermeasure cost information comparing the necessary cost of installing the first refrigerant leak countermeasure device in the first space with the necessary cost of using a mechanical joint that meets a predetermined standard as the pipe joint for the refrigerant piping that is the assumed location of the refrigerant leak, when the refrigerant leak countermeasure necessity determination unit determines that it is necessary to install the first refrigerant leak countermeasure device in the first space and the indoor unit is not installed in the first space. An air conditioning design support system according to any one of claims 1 to 3.

9. A computer-based air conditioning design support method for assisting in the design of installation configurations for air conditioning systems that use refrigerants with a specific gravity greater than air, in a building, A step of recognizing the amount of refrigerant used by the air conditioning system, A step to recognize a suspected refrigerant leakage location, which is a location in the ceiling space where refrigerant leakage from the refrigerant piping of the air conditioning system is expected to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building, A first opening presence / absence recognition step, which recognizes whether or not there is a first opening connecting the first space and the ceiling space in the ceiling surface of the first space which is formed below the suspected location of refrigerant leakage in the ceiling space and is surrounded by a wall, A first space volume recognition step in which the volume of the first space is recognized, When the presence or absence of the first opening is recognized in the first opening presence or absence recognition step, a refrigerant leakage countermeasure necessity determination step is performed to determine whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the volume of the first space, Includes a determination result output step that outputs the determination result obtained in the refrigerant leakage countermeasures necessity determination step. Air conditioning design support method.

10. To assist in designing the installation methods of air conditioning systems that use refrigerants with a specific gravity greater than air, computers are used to assist in the design of installation methods in buildings. A refrigerant usage amount recognition unit that recognizes the amount of refrigerant used by the air conditioning system, A refrigerant leakage location recognition unit recognizes a location in the ceiling space where refrigerant leakage from the refrigerant piping of the air conditioning system is expected to occur when the refrigerant piping of the air conditioning system is installed in the ceiling space of the building, A first opening presence / absence recognition unit recognizes whether or not there is a first opening connecting the first space and the ceiling space in the ceiling surface of the first space which is formed below the suspected location of refrigerant leakage in the ceiling space and is surrounded by a wall, A first space volume recognition unit recognizes the volume of the first space, which is the volume of the first space, When the presence or absence of the first opening is recognized as being present by the first opening presence / absence recognition unit, a refrigerant leakage countermeasure necessity determination unit determines whether or not it is necessary to install a first refrigerant leakage countermeasure device in the first space based on the amount of refrigerant used and the volume of the first space, This unit functions as a determination result output unit that outputs the determination result from the refrigerant leak countermeasure necessity determination unit. program.

Images