Central air conditioning system and its inspection method

Abstract

To provide a whole building air conditioning system useful for specifying a cause existing on the side of a dwelling house and inhibiting air conditioning as well as for inspecting the air conditioner, and provide a method for inspecting the system.SOLUTION: A method for inspecting a whole building air conditioning system 1 for a dwelling house including an air conditioner 6, a duct 7 for supplying air Ac air-conditioned by the air conditioner 6 to a plurality of living rooms 5, and a control part 8 connected with the air conditioner 6 so as to be communicated with each other, includes: a storage step of the control part 8 acquiring state information including at least a temperature and a blowout air quantity on each of a side of a suction port 14 and a side of a blowout port 15 of the air conditioner 6 and making a storage part store the information; a calculation step of the control part 8 calculating a heat quantity including at least a sensible heat capacity and a latent heat capacity of the air conditioner 6 on the basis of the stored state information; and a display step of the control part displaying the calculated heat quantity and / or information obtained from the heat quantity.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a central air conditioning system and an inspection method thereof. [Background technology]

[0002] In recent years, various types of whole-house air conditioning systems for homes have been proposed. For example, Patent Document 1 below describes an air conditioning system including an air-conditioned room in which an indoor unit of an air conditioner is located, a first flow path that supplies at least the air inside the building to the air-conditioned room, a second flow path that has one end communicating with the air-conditioned room and the other end communicating with living rooms in the building, a first fan that supplies the air from the air-conditioned room to the living rooms via the second flow path, and a control device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-085533 Summary of the Invention [Problem to be solved by the invention]

[0004] In a central air conditioning system, the air conditioned by the air conditioner is supplied to multiple rooms via ducts, so it is important that the air conditioner is performing at its optimum air conditioning capacity. Even if the air conditioner is performing at its full capacity, there may be some problem on the home side that prevents it from adequately air-conditioning each room. In such cases, it is not easy to identify the cause of the problem on the home side that is hindering air conditioning.

[0005] The present invention was devised in light of the above-mentioned circumstances, and its main purpose is to provide a whole-house air conditioning system that is useful not only for inspecting air conditioners but also for identifying causes of impeding air conditioning in the home. [Means for solving the problem]

[0006] The present invention is an inspection method for a whole-house air conditioning system in a residence, which includes an air conditioner, a duct for supplying air conditioned by the air conditioner to multiple rooms, and a control unit communicatively connected to the air conditioner, and is characterized by including a storage step in which the control unit acquires status information including at least the temperatures on the inlet and outlet sides of the air conditioner and the blowing air volume and stores the information in a memory unit; a calculation step in which the control unit calculates a heat quantity including at least the sensible heat capacity and latent heat capacity of the air conditioner based on the stored status information; and a display step in which the control unit displays the calculated heat quantity and / or information derived from the heat quantity.

[0007] In the inspection method for the whole-building air conditioning system of the present invention, the control unit may further include a maximum operation step in which the air conditioner is operated in maximum operation mode, and the calculation step may calculate the heat quantity using the status information in the maximum operation mode.

[0008] In the inspection method for the whole-building air conditioning system of the present invention, the control unit may cause the air conditioner to execute the maximum operation step when the temperature on the intake side satisfies a predetermined condition.

[0009] In the inspection method for the whole-building air conditioning system of the present invention, the display step may display at least one of a sensible heat ratio, which is the ratio of the sensible heat capacity to the air conditioning capacity, and a latent heat ratio, which is the ratio of the latent heat capacity to the air conditioning capacity.

[0010] In the method for inspecting a central air-conditioning system according to the present invention, the calculation step may be performed based on predetermined schedule information.

[0011] The method for inspecting a central air-conditioning system according to the present invention may further include a heat quantity information storage step in which the control unit stores the calculated heat quantity in the storage unit.

[0012] The present invention is a program for causing a computer to execute a method for inspecting a whole-house air conditioning system in a residence, the method including an air conditioner, a duct for supplying air conditioned by the air conditioner to multiple rooms, and a computer communicatively connected to the air conditioner, characterized in that the program causes the computer to execute a storage step of acquiring status information including at least the temperatures on the inlet and outlet sides of the air conditioner and the blow-out air volume and storing it in a memory unit, a calculation step of calculating a heat quantity including at least the sensible heat capacity and latent heat capacity of the air conditioner based on the stored status information, and a display step of displaying the calculated heat quantity and / or information derived from the heat quantity.

[0013] The present invention is a whole-house air conditioning system for a residence, comprising an air conditioner, a duct for supplying air conditioned by the air conditioner to a plurality of living rooms, and a control unit communicatively connected to the air conditioner, wherein the control unit comprises a memory unit for storing status information including at least the temperatures on the inlet and outlet sides of the air conditioner and the blown air volume, a calculation unit for calculating a heat quantity including at least the sensible heat capacity and latent heat capacity of the air conditioner based on the status information, and a display unit for displaying the heat quantity and / or information derived from the heat quantity. [Effects of the Invention]

[0014] By adopting the above-described configuration, the central air conditioning system of the present invention makes it possible not only to inspect the air conditioner but also to identify causes of impediments to air conditioning that exist on the residential side. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a cross-sectional view conceptually showing a house in which a central air-conditioning system according to an embodiment of the present invention is installed. [Figure 2] FIG. 1 is a conceptual diagram illustrating a configuration of a control unit according to an embodiment of the present invention. [Figure 3] 4 is a flowchart showing the processing steps of an inspection method for a central air-conditioning system according to the present embodiment. [Figure 4] 10 is a flowchart showing a processing procedure of a calculation step according to the present embodiment. [Figure 5] 10 is a flowchart showing the processing procedure of an inspection step according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be understood that the drawings include exaggerated representations and representations that differ from the dimensional ratios of actual structures in order to facilitate understanding of the contents of the invention. Furthermore, identical or common elements are designated by the same reference numerals throughout the embodiments, and redundant explanations will be omitted. Furthermore, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the contents of the present invention, and the present invention is not limited to the specific configurations shown in the drawings.

[0017] [Residential] FIG. 1 is a cross-sectional view conceptually showing a house 2 in which a central air-conditioning system 1 of this embodiment is installed. The house 2 of this embodiment is configured to include an underfloor space 3 and an above-floor space 4. A plurality of living rooms 5 are provided in the above-floor space 4. The plurality of living rooms 5 of this embodiment include a living room 5A on the first floor and a living room 5B on the second floor. Note that the plurality of living rooms 5 may be configured, for example, only with a living room 5A on the first floor, or may also include living rooms on the third floor or higher (not shown), etc.

[0018] [Whole building air conditioning system] The central air-conditioning system 1 of this embodiment is configured to include an air conditioner 6, a duct 7, and a control unit 8.

[0019] [Air conditioner] The air conditioner 6 of this embodiment is housed, for example, inside a chamber box 11. The chamber box 11 is formed in a box shape with a space inside. The chamber box 11 of this embodiment is provided with an air supply port (not shown) for supplying air Ai circulated through multiple rooms 5 to the inside, and an outside air intake port (not shown) for supplying outside air (underfloor air) Ao to the inside. The outside air Ao of this embodiment is taken in from the underfloor space 3, for example, via an outside air supply duct 12 and an outside air supply fan 13. Note that the outside air Ao may also be taken in directly from outdoors.

[0020] The air conditioner 6 of this embodiment is configured, for example, as a typical split-type air conditioner for home use. The air conditioner 6 includes, as a set, an indoor unit 6A and an outdoor unit (not shown) installed outside the house 2. The indoor unit 6A has an air inlet 14 and an air outlet 15. The air inlet 14 is used to take in air (in this example, a mixture of circulated air Ai and outside air Ao) into a heat exchanger (not shown) provided inside the indoor unit 6A. On the other hand, the air outlet 15 is used to discharge air Ac that has been conditioned by the heat exchanger. The set temperature and air volume (blowout air volume) of the air conditioner 6 are controlled, for example, by a control unit 8.

[0021] The air conditioner 6 of this embodiment can, for example, use a built-in sensor or the like to acquire the temperature and humidity on the air inlet 14 side and the temperature on the air outlet 15 side. Furthermore, the air conditioner 6 can, for example, acquire (estimate) the blow-out air volume from the air volume setting information (TAP1 to 4).

[0022] The temperature and humidity on the suction port 14 side are the temperature and humidity of the air taken in through the suction port 14 (in this example, a mixture of circulated air Ai and outside air Ao). In this embodiment, the temperature and humidity on the suction port 14 side are obtained as the temperature and humidity at the suction port 14. Note that the temperature and humidity on the suction port 14 side may be, for example, the temperature and humidity measured in the space between the suction port 14 and the outside air supply duct 12, within a predetermined range (for example, 10 to 30 cm) from the suction port 14.

[0023] The temperature on the outlet 15 side in this embodiment is the temperature of air (conditioned air) Ac discharged from the outlet 15. In this embodiment, the temperature on the outlet 15 side is acquired as the temperature at the outlet 15. Note that the temperature on the outlet 15 side may be, for example, a temperature measured in the space between the outlet 15 and the duct 7, within a predetermined range (for example, 10 cm or less) from the outlet 15.

[0024] The blown air volume is the volume of air (conditioned air) Ac discharged from the outlet 15. In this embodiment, the blown air volume is obtained as the air volume at the outlet 15. As described above, the blown air volume is estimated from the air volume setting information (TAP1 to 4), but like the temperature on the outlet 15 side, it may also be an air volume measured within the above range.

[0025] For example, the air conditioner 6 can acquire the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume based on a signal from the control unit 8, and transmit these acquired temperatures and the like to the control unit 8. Note that the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume may also be acquired by a sensor (not shown) or the like provided separately from the air conditioner 6.

[0026] [duct] The duct 7 of this embodiment is for supplying air Ac conditioned by the air conditioner 6 to multiple living rooms 5. One end of the duct 7 of this embodiment is connected to the air conditioner 6 side (in this example, the outlet 15 side in the chamber box 11). The other end of the duct 7 is connected to multiple living rooms 5. This allows the duct 7 to communicate between the air conditioner 6 (chamber box 11) and the multiple living rooms 5. The duct 7 of this embodiment includes a first duct 7A connected to living room 5A on the first floor and a second duct 7B connected to living room 5B on the second floor.

[0027] In this embodiment, the duct 7 is provided with a fan 16 for sending (pressurizing) the air Ac conditioned by the air conditioner 6 to the plurality of rooms 5. The fan 16 in this embodiment is housed in the chamber box 11, but is not limited to this configuration. The fan 16 in this embodiment is configured to include a first fan 16A connected to the first duct 7A and a second fan 16B connected to the second duct 7B.

[0028] [Control Unit] The control unit 8 of this embodiment is communicatively connected to the air conditioner 6. The control unit 8 of this embodiment is configured by a computer 9, and is installed on a partition wall of the room 5, for example.

[0029] 2 is a conceptual diagram showing the configuration of the control unit 8 of this embodiment. The control unit 8 is configured to include, for example, a calculation device 18, a storage device 19 for storing processing procedures and the like, and a working memory 20 for reading the processing procedures and the like from the storage device 19. An input device 21 and an output device 22 are connected to the control unit 8 (calculation device 18).

[0030] The input device 21 of this embodiment can be configured, for example, by operation buttons or a touch panel provided on the housing (shown in FIG. 1) of the control unit 8. Information input by, for example, a user (resident) can be transmitted to the control unit 8 (arithmetic unit 18) by this input device 21. The input information includes, for example, instruction information such as starting and stopping air conditioning operation, and a target temperature for each room 5 (shown in FIG. 1).

[0031] The output device 22 of this embodiment is configured as, for example, a display provided on the housing (shown in FIG. 1) of the control unit 8. By receiving a signal from the control unit 8 (arithmetic unit 18), the output device 22 can display, for example, the operating status of the central air-conditioning system 1 (shown in FIG. 1).

[0032] [Arithmetic device] The arithmetic device 18 (control unit 8) of this embodiment is configured with, for example, a CPU (central processing unit). The arithmetic device 18 of this embodiment is communicatively connected to the air conditioner 6. As a result, the arithmetic device 18 can control the operation of the air conditioner 6 (start and stop of cooling operation, heating operation, etc., set temperature, blown air volume, etc.) by transmitting signals to the air conditioner 6. Furthermore, by transmitting signals to the air conditioner 6, the arithmetic device 18 can acquire the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume, and transmit these acquired temperatures, etc. to the arithmetic device 18.

[0033] The computing device 18 of this embodiment is connected to the outside air supply fan 13 and the fan 16 (in this example, the first fan 16A and the second fan 16B). This allows the computing device 18 to transmit signals to the outside air supply fan 13 and the fan 16, thereby controlling the operation (starting and stopping, air volume (rotation speed), etc.) of these fans.

[0034] [Storage device] The storage device 19 of this embodiment is, for example, a non-volatile information storage device. The storage device 19 includes a data section 23 and a program section 24.

[0035] [Data section] The data unit 23 of this embodiment is for storing the calculation results and the like obtained by the arithmetic unit 18. The data unit 23 of this embodiment includes a storage unit 23A. Note that the data unit 23 is not limited to this embodiment, and an input unit or the like for storing other information may be added as necessary.

[0036] The memory unit 23A of this embodiment stores status information indicating the operating status of the air conditioner 6 (in this example, including at least the temperatures on the air inlet 14 side and the air outlet 15 side of the air conditioner 6 shown in FIG. 1, and the blown air volume). The status information of this embodiment further includes, for example, the humidity on the air inlet 14 side. The memory unit 23A of this embodiment also stores the heat quantity, air conditioning capacity, etc. calculated in calculation step S4, which will be described later.

[0037] [Program section] The program unit 24 is a program (computer program) for causing the computer 9 (control unit 8) to execute the inspection method of this embodiment. The program unit (program) 24, when executed by the arithmetic device 18, causes the control unit 8 (computer 9) to function as a specific means.

[0038] The program unit 24 of this embodiment includes, for example, a condition determination unit 24A, a maximum operation unit 24B, a status information acquisition unit 24C, a calculation unit 24D, a display unit 24E, and an inspection unit 24F. Note that the program unit 24 is not limited to this embodiment and may include other programs.

[0039] The condition determination unit 24A is for determining whether the temperature on the air inlet 14 side of the air conditioner 6 (shown in FIG. 1) satisfies a predetermined condition. The maximum operation unit 24B is for operating the air conditioner 6 in maximum operation mode. The status information acquisition unit 24C is for acquiring status information (including at least the temperatures on the air inlet 14 side and the air outlet 15 side of the air conditioner 6, and the blown air volume). Furthermore, the status information acquisition unit 24C of this embodiment acquires the humidity on the air inlet 14 side.

[0040] The calculation unit 24D is for calculating the heat quantity, including at least the sensible heat capacity and latent heat capacity, of the air conditioner 6 (shown in FIG. 1) based on the situation information. The display unit 24E is for displaying the heat quantity calculated by the calculation unit 24D and / or information obtained from the heat quantity. The inspection unit 24F is for determining whether the air conditioner 6 is performing as expected and for identifying causes of air conditioning obstructions present on the house 2 side (structure side). The functions of these program units 24 will be explained in each step of the inspection method described below.

[0041] As shown in FIG. 1, in the whole-building air-conditioning system 1 of this embodiment, the operation of the air conditioner 6, outdoor air supply fan 13, and fan 16 is controlled based on instructions (signals) from the control unit 8. The air conditioner 6 takes in a mixture of air Ai that has circulated through multiple living rooms 5 and outdoor air Ao through an air inlet 14, and discharges conditioned air Ac from an outlet 15. The conditioned air Ac is supplied to the multiple living rooms 5 via a duct 7 (and fan 16). The air Ai that has circulated through the multiple living rooms 5 passes through a return path 28 (including, for example, an undercut 26 provided in a door 25 and a staircase 27) and is supplied again to the air inlet 14 of the air conditioner 6.

[0042] In this way, the central air conditioning system 1 can air-condition and ventilate multiple rooms 5 while circulating air within the house 2. In such a central air conditioning system 1, in order to properly air-condition the multiple rooms 5, it is important that the air conditioner 6 is exhibiting appropriate air-conditioning capacity.

[0043] Furthermore, even when the air conditioner 6 is performing to its full potential, there may be some cause on the home 2 side that prevents it from adequately air-conditioning each room 5. There are various causes for this type of air conditioning obstruction (hereinafter simply referred to as "air-conditioning obstruction causes"). Causes of air-conditioning obstruction include, for example, when the return path 28 for air Ai from each room 5 to the air conditioner 6 is not sufficiently secured. Further causes of air-conditioning obstruction include when there is a weak point in airtightness in the home 2. Examples of weak points in airtightness include gaps that connect an outlet plate (not shown) or an elevator (not shown) to the outdoors.

[0044] Such air conditioning obstruction causes, for example, a shortage of air Ai from the return path 28, causing outside air (not shown) to seep in through weak airtight spots and be introduced into the air intake 14 of the indoor unit 6A. As a result, the room temperature adjustment function of each room 5 cannot be fully performed. Furthermore, air conditioning obstruction causes, for example, a so-called shortcut, in which the conditioned air Ac returns to the indoor unit 6A via a path different from the original return path 28 before being distributed throughout each room 5. In this way, these air conditioning obstruction causes obstruction to the air conditioning of each room 5. However, it is not easy to identify these air conditioning obstruction causes.

[0045] As a result of extensive research, the inventors discovered that there is a correlation between the heat quantity, including the sensible heat capacity and latent heat capacity, of the air conditioner and the cause of air conditioning obstruction. For example, if there is an air conditioning obstruction cause, such as outside air (e.g., hot and humid outside air) seeping in through a weak point in the airtightness and being introduced into the air intake 14 of the indoor unit 6A, the air conditioner 6 switches to dehumidification operation, resulting in a decrease in the sensible heat capacity and an increase in the latent heat capacity of the air conditioner 6. This prevents the room temperature adjustment function of each room 5 from being fully performed. Based on this knowledge, the inspection method for the central air conditioning system 1 of this embodiment (hereinafter sometimes simply referred to as the "inspection method") identifies the cause of air conditioning obstruction.

[0046] [Inspection method for central air conditioning system (first embodiment)] Next, the processing procedure of the inspection method of this embodiment (functions of the central air conditioning system 1) will be explained. In the inspection method of this embodiment, not only is the air conditioner 6 inspected, but the cause of the air conditioning obstruction (a cause that obstructs air conditioning on the home 2 side) is identified. In the inspection of the air conditioner 6 of this embodiment, it is determined whether the air conditioner 6 is performing as originally expected.

[0047] In the present embodiment, the control unit 8 receives an instruction to start the execution of the inspection method, thereby executing the inspection method; however, the present invention is not limited to this. For example, the execution of the inspection method may be started simultaneously with the start of operation of the central air-conditioning system 1. Furthermore, the instruction to the control unit 8 in this embodiment is given by, for example, a serviceman (technician) who repairs the central air-conditioning system 1, but may also be given by a resident of the house 2, for example. Furthermore, the instruction to the control unit 8 may be given directly from the input device 21 (shown in FIG. 2) of the control unit 8, or may be given from another computer (for example, a cloud server) connected to the control unit 8 via a WAN (Internet), for example.

[0048] In the inspection method of this embodiment, a heat quantity (hereinafter sometimes simply referred to as "heat quantity") including at least the sensible heat capacity and latent heat capacity of the air conditioner 6 is calculated based on status information of the air conditioner 6. In this embodiment, the sensible heat capacity is calculated as the heat quantity.

[0049] Furthermore, in the inspection method of this embodiment, the heat quantity (in this example, sensible heat capacity) and the air conditioning capacity of the air conditioner 6 are calculated. Then, in the inspection method of this embodiment, the air conditioner 6 is inspected and the cause of the air conditioning obstruction is identified based on these heat quantities and air conditioning capacity.

[0050] Incidentally, in order to accurately inspect the air conditioner 6 and identify the cause of air conditioning obstruction, it is desirable to obtain status information when the air conditioner 6 is operating under conditions suitable for calculating the heat quantity (in this example, sensible heat capacity) and air conditioning capacity of the air conditioner 6.

[0051] Conditions suitable for calculation can be specified as appropriate depending on, for example, the air conditioner 6 (shown in FIG. 1). The conditions in this embodiment include the maximum operation mode of the air conditioner 6. Maximum operation mode is a state in which the air discharge volume of the air conditioner 6 is maximized and the air conditioner 6 is operated at maximum capacity (including cooling operation and heating operation). Such maximum operation mode allows the air conditioner 6 to operate at its maximum capacity. Therefore, by calculating the amount of heat (in this example, sensible heat capacity) and air conditioning capacity based on status information in maximum operation mode, it becomes possible to inspect whether the air conditioner 6 is performing at the capacity originally expected and to accurately identify the cause of air conditioning obstruction.

[0052] Furthermore, even if the air conditioner 6 (shown in FIG. 1) is operated in maximum operation mode, depending on the air conditioning conditions and environment (for example, the temperature on the air inlet 14 side), it may not be possible to maximize the inherent capacity of the air conditioner 6. For example, during heating operation, if the temperature on the air inlet 14 side is higher than a predetermined temperature (26°C in this embodiment), it may be difficult to maximize the inherent capacity even if the air conditioner 6 is operated in maximum operation mode. On the other hand, during cooling operation, if the temperature on the air inlet 14 side is lower than a predetermined temperature (20°C in this embodiment), it may be difficult to maximize the inherent capacity even if the air conditioner 6 is operated in maximum operation mode.

[0053] In the inspection of this embodiment, prior to acquiring status information, when the temperature on the air inlet 14 side satisfies a predetermined condition, the air conditioner 6 is operated in maximum operation mode. Figure 3 is a flowchart showing the processing steps of the inspection method for the central air conditioning system 1 of this embodiment.

[0054] [Conditional decision step] In the inspection method of this embodiment, first, control unit 8 determines whether or not the temperature on the suction port 14 side satisfies a predetermined condition (condition determination step S1). In condition determination step S1 of this embodiment, first, condition determination unit 24A shown in Fig. 2 is loaded into working memory 20. Then, condition determination unit 24A is executed by arithmetic device 18, thereby causing control unit 8 (computer 9) to function as a means for determining whether or not the temperature on the suction port 14 side satisfies a predetermined condition.

[0055] In condition determination step S1 of this embodiment, condition determination unit 24A (control unit 8) transmits a signal to air conditioner 6 to acquire the temperature on the air inlet 14 side shown in Fig. 1. This allows condition determination unit 24A (control unit 8) to acquire the temperature on the air inlet 14 side. Then, in condition determination step S1 of this embodiment, it is determined whether or not the temperature on the air inlet 14 side satisfies a predetermined condition.

[0056] As described above, if the temperature on the air inlet 14 side is higher than a predetermined temperature (26°C in this embodiment) during heating operation, it will be difficult to maximize the original capacity even if the air conditioner is operated in maximum operation mode. For this reason, in condition determination step S1 of this embodiment, it is determined that the condition is satisfied if the air conditioner 6 is in heating operation and the temperature on the air inlet 14 side is equal to or lower than a predetermined temperature (26°C in this embodiment).

[0057] On the other hand, during cooling operation, if the temperature on the air inlet 14 side is lower than a predetermined temperature (20°C in this embodiment), it is difficult to maximize the original capacity even when operating in maximum operation mode. For this reason, in condition determination step S1 of this embodiment, it is determined that the condition is satisfied if the air conditioner 6 is in cooling operation and the temperature on the air inlet 14 side is equal to or higher than a predetermined temperature (20°C in this embodiment).

[0058] In the condition determination step S1, if it is determined that the temperature on the air inlet 14 side satisfies the predetermined condition ("Yes" in the condition determination step S1), the air conditioner 6 is operated in maximum operation mode, thereby making it possible to maximize the inherent capabilities of the air conditioner 6. In this case, the next maximum operation step S2 is performed.

[0059] On the other hand, if it is determined in condition determination step S1 that the temperature on the air inlet 14 side does not satisfy the predetermined condition ("No" in condition determination step S1), it will be difficult to maximize the inherent capacity of the air conditioner 6 even if it is operated in maximum operation mode. In this case, condition determination step S1 is performed again.

[0060] It may take some time for the temperature on the air inlet 14 side to reach a state that satisfies the predetermined condition. For this reason, condition determination step S1 may be performed again after a predetermined time (for example, 0.5 to 2.0 hours) has elapsed since a negative (“No”) determination was made in condition determination step S1.

[0061] [Maximum operation steps] Next, in the inspection method of this embodiment, the control unit 8 operates the air conditioner 6 in maximum operation mode (maximum operation step S2). In maximum operation step S2, first, the maximum operation unit 24B shown in Fig. 2 is loaded into the work memory 20. Then, the maximum operation unit 24B is executed by the arithmetic device 18, causing the control unit 8 (computer 9) to function as a means for operating the air conditioner 6 in maximum operation mode.

[0062] In the maximum operation step S2 of this embodiment, the maximum operation unit 24B (control unit 8) transmits a signal to the air conditioner 6 to maximize the blow-out air volume of the air conditioner 6 and operate the air conditioner 6 at maximum capacity. If the air conditioner 6 is in heating operation, it is operated in heating operation in maximum operation mode. On the other hand, if the air conditioner 6 is in cooling operation, it is operated in cooling operation in maximum operation mode.

[0063] In the inspection method of this embodiment, after it is determined in condition determination step S1 that the temperature on the air inlet 14 side satisfies a predetermined condition, maximum operation step S2 is performed. Therefore, in maximum operation step S2 of this embodiment, it is possible to operate the air conditioner 6 while making the most of its inherent capabilities.

[0064] [Memory Step] Next, in the inspection method of this embodiment, the control unit 8 acquires situation information and stores it in the memory unit 23A (storage step S3). In the storage step S3 of this embodiment, first, the situation information acquisition unit 24C shown in FIG. 2 is loaded into the working memory 20. Then, the situation information acquisition unit 24C is executed by the arithmetic device 18, thereby causing the control unit 8 (computer 9) to function as a means for acquiring situation information and storing it in the memory unit 23A. Although the situation information of this embodiment is acquired and stored in chronological order, it may also be acquired and stored at any timing (spot).

[0065] In the storage step S3 of this embodiment, first, acquisition of status information is started. In this embodiment, in order to acquire the status information (in this example, the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume shown in FIG. 1), the status information acquisition unit 24C (control unit 8) transmits a signal to the air conditioner 6. This allows the calculation device 18 (control unit 8) to acquire the status information.

[0066] In the storage step S3 of this embodiment, from the start of acquisition of the status information until the end of acquisition of the status information, status information is acquired at predetermined time intervals (for example, 1 to 20 minutes). As a result, in the storage step S3 of this embodiment, status information can be acquired in chronological order (at time intervals). The status information acquired in chronological order is stored in the storage unit 23A.

[0067] The timing for ending acquisition of the status information can be set appropriately as long as status information that can be used to calculate the heat quantity and air conditioning capacity of the air conditioner 6 can be acquired in calculation step S4, which will be described later. For example, if a defrosting operation (defrosting operation) is started during heating operation, heating operation in maximum operation mode is forcibly interrupted. For this reason, in storage step S3, acquisition of the status information may be ended, for example, after a time longer than the time required for defrosting operation has elapsed since acquisition of the status information was started. This makes it possible to reliably acquire status information during heating operation in maximum operation mode.

[0068] [Calculation step] Next, in the inspection method of this embodiment, the control unit 8 calculates at least the heat quantity (in this example, the sensible heat capacity) of the air conditioner 6 based on the stored status information (calculation step S4). In calculation step S4 of this embodiment, the heat quantity and air conditioning capacity of the air conditioner 6 for a certain operating time (any operating time) or period (any operating period) are calculated.

[0069] In calculation step S4 of this embodiment, first, the situation information stored in memory unit 23A shown in Fig. 2 and calculation unit 24D of program unit 24 are read into working memory 20. Then, calculation unit 24D is executed by arithmetic device 18, causing control unit 8 (computer 9) to function as a means for calculating the heat quantity (in this example, sensible heat capacity) and air conditioning capacity of the air conditioner 6.

[0070] When status information is acquired and stored at any timing (spot), the amount of heat and air conditioning capacity are calculated at the operating time when the status information is acquired. On the other hand, when status information is acquired and stored in chronological order, the amount of heat and air conditioning capacity are calculated based on the status information at any operating time and period. In this embodiment, an operating time suitable for calculating the amount of heat and air conditioning capacity (in this example, any operating time during operation in maximum operation mode (excluding, for example, times during defrosting operation)) is selected from each operating time of the status information acquired in chronological order. Then, the amount of heat and air conditioning capacity are calculated based on the status information at the selected operating time.

[0071] It should be noted that, among the status information for the selected operation times, if status information for an operation time when the temperature on the air inlet 14 side temporarily fluctuates due to, for example, the occupants opening windows or doors is used, the amount of heat and air conditioning capacity may not be calculated accurately. For this reason, it is desirable to use status information for an operation time when the temperature on the air inlet 14 side is stable (for example, with a fluctuation range of ±1°C).

[0072] [Calculate heat amount] FIG. 4 is a flowchart showing an example of the processing procedure of calculation step S4. In calculation step S4 of this embodiment, first, the heat quantity (in this example, the sensible heat capacity) of the air conditioner 6 is calculated (step S41). The sensible heat capacity (actual sensible heat air conditioning capacity Q 顕熱 ) is calculated using, for example, the following formula (1): Condition information at the selected operation time (in this example, the temperature and humidity on the inlet 14 side, the temperature on the outlet 15 side, and the blown air volume shown in FIG. 1) is substituted into this formula (1).

[0073]

number

[0074] The blown air volume at the selected operation time is substituted for the blown air volume V in the above formula (1). i The temperature on the air inlet 14 side at the selected operation time is substituted into the temperature T o The temperature on the air outlet 15 side at the selected operation time is substituted into the humidity X on the air inlet side in the above formula (1). i is substituted with the humidity (absolute humidity) on the air inlet 14 side at the selected operation time. When the humidity on the air inlet 14 side is acquired as relative humidity, it is converted to absolute humidity using, for example, the temperature and humidity on the air inlet 14 side. As a result, in step S41, the sensible heat capacity (actual sensible heat air conditioning capacity Q 顕熱 ) can be calculated. Here, in the above formula (1), the enthalpy on the outlet side h o is the enthalpy of the suction port h i Similarly, the humidity on the intake side is X i This is because the calculation of the sensible heat capacity is based on the assumption that the air taken in through the air inlet 14 is not dehumidified, but is discharged from the air outlet 15 while maintaining the humidity (absolute humidity) on the air inlet 14 side. As a result, in this embodiment, it is not necessary to measure the humidity on the air outlet 15 side, and therefore the sensible heat capacity (actual sensible heat air conditioning capacity Q 顕熱 ) can be easily calculated.

[0075] Furthermore, when calculating the amount of heat (in this example, sensible heat capacity) for a certain period (any operating period), first, the amount of heat for each operating time is calculated from the status information acquired at time intervals (each operating time) during that period, based on the same procedure as above. Then, the amount of heat for each operating time is averaged, allowing the amount of heat for the certain period (average value) to be calculated.

[0076] Another calculation method is to first calculate the average values ​​of the status information (average temperature on the inlet 14 side, average temperature on the outlet 15 side, and average blown air volume) for a certain period. Then, by substituting these average values ​​into the above formula (1), the average value of the heat quantity can be calculated. Note that the calculation method is not limited to these modes.

[0077] [Calculate air conditioning capacity] Next, in calculation step S4 of this embodiment, the air conditioning capacity of the air conditioner 6 is calculated (step S42). 全熱 ) is calculated using, for example, the following formula (2): Condition information at the selected operation time (in this example, the temperature and humidity on the inlet 14 side, the temperature on the outlet 15 side, and the blown air volume shown in FIG. 1) is substituted into this formula (2).

[0078]

number

[0079] The blown air volume at the selected operation time is substituted for the blown air volume V in the above formula (2). i The temperature on the air inlet 14 side at the selected operation time is substituted into the temperature T o The temperature on the air outlet 15 side at the selected operation time is substituted into the humidity X on the air inlet side in the above formula (2). i is substituted with the humidity (absolute humidity) on the air inlet 14 side at the selected operation time. When the humidity on the air inlet 14 side is acquired as relative humidity, it is converted to absolute humidity using, for example, the temperature and humidity on the air inlet 14 side.

[0080] Humidity X on the outlet side of the above formula (2) o is substituted with the humidity (absolute humidity) on the outlet 15 side at the selected operation time. The humidity on the outlet 15 side in this embodiment is the humidity of the conditioned air Ac. Here, the situation information in this embodiment does not include the humidity on the outlet 15 side. Therefore, in this embodiment, the humidity on the outlet 15 side is found (estimated) based on the situation information (in this example, the humidity on the inlet 14 side and the temperature on the outlet 15 side).

[0081] In this embodiment, in order to find the humidity (absolute humidity) on the outlet 15 side, first, the dew point temperature of the air taken in from the outlet 14 is calculated from the humidity (absolute humidity) on the inlet 14 side at the selected operating time. Next, it is determined whether the temperature on the outlet 15 side at the selected operating time is equal to or higher than the dew point temperature. If the temperature on the outlet 15 side is equal to or higher than the dew point temperature, it is considered that the air taken in from the inlet 14 is not dehumidified by the operation of the air conditioner 6 (dehumidification operation, etc.), and is discharged from the outlet 15 while maintaining the humidity on the inlet 14 side. In this case, the humidity (absolute humidity) on the outlet 15 side is found (estimated) to be the same absolute humidity as on the inlet 14 side. Therefore, the humidity X on the outlet side in the above formula (1) oThe humidity (absolute humidity) on the suction port 14 side is substituted for .

[0082] On the other hand, when the temperature on the air outlet 15 side is lower than the dew point temperature, it is considered that the air taken in from the air inlet 14 is dehumidified by the operation (dehumidification operation, etc.) of the air conditioner 6 and then discharged from the air outlet 15. In this case, the humidity (absolute humidity) on the air outlet 15 side is calculated (estimated) as the saturated absolute humidity at the temperature on the air outlet 15 side. Therefore, the humidity X on the air outlet side in the above formula (2) is o The saturated absolute humidity at the temperature on the outlet 15 side is substituted for .

[0083] As described above, with the inspection method of this embodiment, even if the humidity on the outlet 15 side has not actually been measured, it can be easily determined (estimated) from the situation information (in this example, the humidity on the inlet 14 side and the temperature on the outlet 15 side). As a result, the air conditioner 6 of this embodiment is not limited to one that can measure the humidity on the outlet 15 side. Furthermore, there is no need to separately install, for example, a humidity sensor (not shown) on the outlet 15 side. Therefore, the inspection method of this embodiment makes it possible to reduce the introduction cost of the central air-conditioning system 1 while increasing versatility.

[0084] In step S42 of this embodiment, the situation information (in this example, the temperature and humidity on the inlet 14 side, the temperature on the outlet 15 side, and the blown air volume) and the predicted humidity on the outlet 15 side for the selected operation time are substituted into the above formula (2). As a result, the air conditioning capacity (actual total heat air conditioning capacity Q 全熱 ) can be calculated.

[0085] Furthermore, when calculating the air conditioning capacity for a certain period (any operating period), first, the air conditioning capacity for each operating time is calculated from the status information acquired at time intervals (each operating time) during that period, based on the same procedure as above. Then, the air conditioning capacity for each operating time is averaged, allowing the air conditioning capacity (average value) for the certain period to be calculated.

[0086] Another calculation method is to first determine the average values ​​of the situation information for a certain period (average temperature and average humidity on the inlet 14 side, average temperature on the outlet 15 side, and average blown air volume). Then, the average humidity on the outlet 15 side is predicted. Then, by substituting these average values ​​into the above formula (2), the average air conditioning capacity can be calculated. Note that the calculation method is not limited to these modes.

[0087] [Heat information storage step] Next, in the inspection method of this embodiment, control unit 8 stores the calculated heat quantity in memory unit 23A (heat quantity information storage step S5). In heat quantity information storage step S5 of this embodiment, the heat quantity (in this example, sensible heat capacity) and air conditioning capacity calculated in calculation step S4 are stored in memory unit 23A. Note that when the heat quantity and air conditioning capacity for a certain period (any operating period) are calculated in calculation step S4, the heat quantity and air conditioning capacity at each operating time during that period may also be stored.

[0088] [Display Steps] Next, in the inspection method of this embodiment, control unit 8 displays the calculated heat quantity and / or information obtained from the heat quantity (display step S6). In display step S6 of this embodiment, first, the heat quantity (in this example, sensible heat capacity) and air conditioning capacity stored in memory unit 23A shown in FIG. 2, and display unit 24E of program unit 24 are read into work memory 20. Then, display unit 24E is executed by arithmetic device 18, causing control unit 8 (computer 9) to function as a means for displaying the calculated heat quantity and / or information obtained from the heat quantity.

[0089] In display step S6, either the calculated heat quantity (in this example, sensible heat capacity) or information derived from the heat quantity may be displayed, or both may be displayed. The information derived from the heat quantity is not particularly limited as long as it is capable of identifying the cause of the air conditioning obstruction. In this embodiment, the sensible heat ratio (the ratio of sensible heat capacity to air conditioning capacity) is displayed as information derived from the heat quantity. The smaller the value of such a sensible heat ratio, the lower the sensible heat capacity relative to air conditioning capacity, indicating a high possibility that a cause of air conditioning obstruction exists.

[0090] In display step S6 of this embodiment, capacity information regarding the calculated air conditioning capacity is displayed together with the calculated heat quantity. Any capacity information that allows for determining whether the air conditioner 6 is performing at the capacity that is originally expected can be displayed as appropriate. In display step S6, for example, the calculated air conditioning capacity may be displayed as the capacity information, or the ratio to an expected air conditioning capacity predetermined for the air conditioner 6 (in this example, air conditioning capacity / expected air conditioning capacity) may be displayed.

[0091] In this embodiment, the calorie and capacity information is displayed on the output device 22 (display) of the control unit 8, but may also be displayed on an output device (for example, a display or printer) of a cloud server or the like.

[0092] [Inspection steps] Next, in the inspection method of this embodiment, the central air conditioning system 1 is inspected (inspection step S7). In inspection step S7 of this embodiment, the air conditioner 6 is inspected (in this example, it is determined whether the air conditioner 6 is performing as expected), and the cause of the air conditioning obstruction is identified.

[0093] Inspection of the central air-conditioning system 1 may be performed by a service technician based on the heat quantity and capacity information displayed in display step S6, or may be performed by the control unit 8. In this embodiment, inspection of the central air-conditioning system 1 is performed by the control unit 8.

[0094] In the inspection step S7 of this embodiment, first, as shown in Fig. 2, the inspection section 24F of the program section 24 is read into the work memory 20. Then, the inspection section 24F is executed by the arithmetic device 18, thereby causing the control section 8 (computer 9) to function as a means for inspecting the central air-conditioning system 1. Fig. 5 is a flowchart showing an example of the processing procedure of the inspection step S7.

[0095] [Check the air conditioner] In the inspection step S7 of this embodiment, first, the air conditioner 6 is inspected (in this example, it is determined whether the air conditioner 6 is performing the capacity that is originally expected) (step S71). In step S71 of this embodiment, if the calculated air conditioning capacity or the ratio to the expected air conditioning capacity (in this example, air conditioning capacity / expected air conditioning capacity) is equal to or greater than a predetermined threshold, it is determined that the air conditioner 6 is performing the capacity that is originally expected. On the other hand, if the calculated air conditioning capacity or the ratio to the expected air conditioning capacity is less than the threshold, it is determined that the air conditioner 6 is not performing the capacity that is originally expected. The threshold is set appropriately according to the capacity that is expected of the air conditioner 6. The threshold for the ratio is set to, for example, 95%.

[0096] In step S71, if it is determined that the air conditioner 6 is performing as expected ("Yes" in step S71), it is determined that there is no malfunction in the air conditioner 6. In this case, in inspection step S7, the next step S72 is carried out.

[0097] On the other hand, if it is determined in step S71 that the air conditioner 6 is not performing as expected ("No" in step S71), it is determined that there is a malfunction in the air conditioner 6. Causes of the malfunction include, for example, a refrigerant leak in the air conditioner 6 or an inappropriate installation space for the outdoor unit (not shown). In this case, step S73 is executed to repair (maintain) the air conditioner 6.

[0098] [Identify the cause of air conditioning obstruction] Next, in inspection step S7 of this embodiment, the cause of the air conditioning obstruction is identified (step S72). In step S72 of this embodiment, it is determined whether the calculated heat quantity (in this example, sensible heat capacity) or sensible heat ratio (ratio of sensible heat capacity to air conditioning capacity) is less than a predetermined threshold. The threshold is set appropriately depending on the air conditioning capacity expected of the central air conditioning system 1. The threshold for the sensible heat ratio is set to, for example, 70%.

[0099] In step S72, if the heat quantity (sensible heat capacity) or sensible heat ratio is less than the threshold value, the air conditioner 6 is performing at its full capacity as determined in step S71, but is not sufficiently air-conditioning each room 5. Therefore, in step S72, it is determined that a cause of air-conditioning obstruction exists.

[0100] In this embodiment, the cause of the air conditioning obstruction is identified as the presence of a weak point in airtightness or an insufficient return path 28. If the cause of the air conditioning obstruction is identified in step S72 ("Yes" in step S72), step S74 is executed to repair the house 2 in order to eliminate the cause of the air conditioning obstruction.

[0101] On the other hand, if the calculated heat quantity (sensible heat capacity) or sensible heat ratio is equal to or greater than the threshold, it is determined that each room 5 is being sufficiently air-conditioned and therefore no cause of air-conditioning obstruction exists. In this case, the cause of air-conditioning obstruction is not identified ("No" in step S72), and the series of processes in the inspection method of this embodiment ends. Note that if the room 5 is not being properly air-conditioned even though the cause of air-conditioning obstruction is not identified, the cause of the malfunction in the central air-conditioning system 1 may be analyzed in detail, for example, by a serviceman or the like.

[0102] [Air conditioner repair] In step S73 of this embodiment, a serviceman (technician) or the like who repairs the malfunction of the central air conditioning system 1 is dispatched to the house 2. The serviceman can quickly identify the cause of the malfunction of the air conditioner 6, for example, based on the air conditioning capacity displayed in display step S6 and the status information stored in the memory unit 23A. The serviceman can then quickly repair (maintain) the air conditioner 6 based on the identified cause of the malfunction. As a result, the inspection method of this embodiment makes it possible to reliably ensure that the air conditioner 6 performs at the capacity that is originally expected of it.

[0103] [House repairs] In step S74 of this embodiment, a serviceman (engineer) or the like is dispatched to the house 2. The serviceman repairs the house 2, for example, based on the identified cause of the air conditioning obstruction. In order to identify the cause of the air conditioning obstruction in detail, the heat quantity (sensible heat ratio) displayed in display step S6 and the situation information stored in the memory unit 23A may be analyzed.

[0104] If there is a weak spot in the airtightness of the house 2, the weak spot can be eliminated, for example, by adding an airtight material to the weak spot. Also, if the return path 28 is not sufficiently secured, the return path 28 can be secured, for example, by removing obstacles on the return path 28 or by adding an undercut 26 or the like to a door 25 provided on the return path 28. In this way, the inspection method of this embodiment can eliminate the cause of air conditioning obstruction, making it possible to sufficiently air-condition the living room 5.

[0105] [Inspection method for central air conditioning systems (operation of central air conditioning systems and programs)] In this way, the inspection method (whole-building air-conditioning system 1 and program) of this embodiment calculates at least the heat quantity (in this example, sensible heat capacity) of the air conditioner 6 based on the stored status information, and displays the heat quantity or information derived from the heat quantity (in this example, sensible heat ratio). Furthermore, the inspection method of this embodiment calculates the air conditioning capacity of the air conditioner 6 and displays that air conditioning capacity. As a result, the inspection method of this embodiment can inspect whether the air conditioner 6 is exerting appropriate air conditioning capacity. Furthermore, the inspection method of this embodiment can identify the cause of air conditioning obstruction if the air conditioner 6 is exerting appropriate air conditioning capacity but is unable to adequately air-condition each room 5 due to some cause on the home 2 side.

[0106] Furthermore, in the inspection method (whole-building air-conditioning system 1 and program) of this embodiment, the heat quantity (in this example, sensible heat capacity) and air conditioning capacity of the air conditioner 6 are calculated using status information in maximum operation mode, in which the air conditioner 6 is operating at its maximum capacity. As a result, the inspection method of this embodiment can calculate the heat quantity (in this example, sensible heat capacity) and air conditioning capacity of the air conditioner 6 under appropriate conditions, making it possible to accurately inspect the air conditioner 6 and identify the cause of air conditioning obstruction.

[0107] Furthermore, with the inspection method of this embodiment (whole building air conditioning system 1 and program), when the temperature on the air inlet 14 side satisfies a predetermined condition, the air conditioner 6 can be operated in maximum operation mode. As a result, with the inspection method of this embodiment, it is possible to operate the air conditioner 6 while making the most of the inherent capacity of the air conditioner 6. Therefore, with the inspection method of this embodiment, it is possible to calculate the heat quantity (in this example, sensible heat capacity) and air conditioning capacity of the air conditioner 6 under more appropriate conditions, making it possible to inspect the air conditioner 6 and identify the cause of air conditioning obstruction more accurately.

[0108] The inspection method (central air conditioning system 1 and program) of this embodiment can suppress variations in the amount of heat (sensible heat capacity) and air conditioning capacity obtained due to, for example, the proficiency of the service technician or the time when the service technician is dispatched (the time when the air conditioning capacity cannot be utilized), etc. Therefore, the inspection method of this embodiment can accurately inspect the air conditioner 6 and identify the cause of the air conditioning obstruction.

[0109] [Method for inspecting a central air conditioning system (second embodiment)] [Calculation step (second embodiment)] In calculation step S4 of the previous embodiments, the sensible heat capacity was calculated as the heat quantity of the air conditioner 6, but this is not limited to this. The latent heat capacity may also be calculated as the heat quantity of the air conditioner 6. In this embodiment, the same components as those in the previous embodiments are given the same reference numerals, and descriptions thereof may be omitted.

[0110] The latent heat capacity is calculated using, for example, the following formula (3): 顕熱 ) and air conditioning capacity (actual total heat air conditioning capacity Q 全熱 ) is substituted.

[0111]

number

[0112] The above formula (3) contains the actual total heat air conditioning capacity Q determined by the above formula (2) based on the situation information of the selected operation time. 全熱 and the actual sensible heat air conditioning capacity Q specified by the above formula (1) 顕熱 Then, in the above formula (3), the actual total heat air conditioning capacity Q 全熱 From this, the actual sensible heat air conditioning capacity Q 顕熱By subtracting this, the latent heat capacity at the selected operating time (actual latent heat air conditioning capacity Q 潜熱 ) can be calculated.

[0113] In addition, when calculating the latent heat capacity for a certain period (any operating period), first, based on the above procedure, the air conditioning capacity for the certain period (actual total heat air conditioning capacity Q 全熱 ), and the sensible heat capacity for a certain period (actual sensible heat air conditioning capacity Q 顕熱 ) is obtained. Then, by substituting these air conditioning capacities and sensible heat capacities into the above formula (3), the latent heat capacity for a certain period can be calculated. Note that the calculation method is not limited to these modes.

[0114] [Display step (second embodiment)] In display step S6 of this embodiment, the latent heat ratio (the ratio of latent heat capacity to air conditioning capacity) is displayed as information obtained from the heat quantity. The larger the value of this latent heat ratio, the greater the latent heat capacity relative to air conditioning capacity, indicating a high possibility of the presence of an air conditioning obstruction cause.

[0115] [Inspection step (second embodiment)] In inspection step S7 of this embodiment, in step S72 of identifying the cause of air conditioning obstruction, if the latent heat capacity or latent heat ratio is greater than a predetermined threshold, it is determined that each room 5 is not being sufficiently air-conditioned and that an air-conditioning obstruction cause exists. On the other hand, if the latent heat capacity or latent heat ratio is equal to or less than the threshold, it is determined that each room 5 is being sufficiently air-conditioned and that no air-conditioning obstruction cause exists. The threshold is set appropriately depending on the air-conditioning capacity expected of the central air-conditioning system 1. The threshold for the latent heat ratio is set to, for example, 30%.

[0116] In this way, in the inspection method (whole-building air conditioning system and program) of this embodiment, the latent heat capacity is calculated as the heat quantity of the air conditioner 6, and that heat quantity or information derived from the heat quantity (in this example, the latent heat ratio) is displayed. As a result, in the inspection method of this embodiment, as in the previous embodiments, it is possible to inspect whether the air conditioner 6 is exerting appropriate air conditioning capacity, and even if appropriate air conditioning capacity is being exerted, it is possible to identify the cause of air conditioning obstruction.

[0117] In this embodiment, calculation step S4 calculates the latent heat capacity, but sensible heat capacity may also be calculated. Furthermore, in display step S6 of this embodiment, the latent heat capacity and latent heat ratio are displayed as the heat quantity and information obtained from the heat quantity, but the sensible heat capacity and sensible heat ratio may also be displayed together. As a result, the inspection method of this embodiment makes it possible to inspect the air conditioner 6 and identify factors inhibiting air conditioning based on both the sensible heat capacity (sensible heat ratio) and the latent heat capacity (latent heat ratio).

[0118] [Performance evaluation method for central air conditioning system (third embodiment)] In the embodiments described above, the status information includes the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume, as shown in FIG. 1 , but is not limited to this. For example, the status information may further include the outside air temperature. In this embodiment, the same components as those in the embodiments described above are designated by the same reference numerals, and descriptions thereof may be omitted.

[0119] The outdoor air temperature can be measured as appropriate. In this embodiment, the outdoor air temperature is measured, for example, by an outdoor air temperature sensor 29 (shown in FIG. 1). As shown in FIG. 1, the outdoor air temperature sensor 29 may be a temperature sensor provided in an opening 31 of a foundation 30, or may be a temperature sensor provided in an outdoor unit (not shown) of the air conditioner 6. The outdoor air temperature sensor 29 is connected to the control unit 8 (the calculation device 18 (shown in FIG. 2)). This allows the control unit 8 to acquire the outdoor air temperature by transmitting a signal from the outdoor air temperature sensor 29, and to transmit the acquired outdoor air temperature to the calculation device 18.

[0120] [Storage step (third embodiment)] In the storage step S3 of this embodiment, the temperature and humidity on the air inlet 14 side, the temperature on the air outlet 15 side, and the blown air volume are acquired, as well as the outdoor air temperature, as situation information. As a result, the performance determination method of this embodiment can identify the outdoor air temperature when the air conditioner 6 is operated in the maximum operation mode.

[0121] [Calculation step (third embodiment)] Incidentally, standards (e.g., JIS-B8616, etc.) stipulate that air conditioning capacity (rated capacity) is to be obtained at a predetermined outdoor temperature. For example, it is stipulated that air conditioning capacity during heating operation is to be obtained when the outdoor temperature is 7°C. On the other hand, it is stipulated that air conditioning capacity during cooling operation is to be obtained when the outdoor temperature is 35°C. Note that the outdoor temperature is not limited to these temperatures and can be changed as appropriate depending on revisions to standards, the type of standard to be applied, etc.

[0122] In calculation step S4 of this embodiment, the air conditioning capacity and heat quantity are calculated for the operating time or period when the outside air temperature satisfies predetermined conditions (in this example, 7°C during heating operation, 35°C during cooling operation). As a result, the performance determination method of this embodiment can calculate the rated capacity, and therefore, in inspection step S7, it becomes possible to accurately determine whether the capacity of the air conditioner 6 is good or bad based on the rated capacity.

[0123] In the performance determination method of this embodiment, in the condition determination step S1, it may be determined whether the outside air temperature satisfies a predetermined condition (in this example, 7°C during heating operation and 35°C during cooling operation). In this case, when the outside air temperature satisfies the condition, the maximum operation step S2 and the storage step S3 are performed, so that it is possible to reliably obtain status information when the outside air temperature satisfies the predetermined condition. Therefore, it is possible to reliably calculate the rated capacity.

[0124] [Inspection method for central air conditioning system (fourth embodiment)] In the above-described embodiments, calculation step S4 is executed when it is determined in condition determination step S1 that the temperature on the air inlet 14 side satisfies a predetermined condition, but this is not limiting. For example, calculation step S4 may be executed based on predetermined schedule information. In this embodiment, the same components as those in the above-described embodiments are denoted by the same reference numerals, and descriptions thereof may be omitted.

[0125] The schedule information is, for example, an operation time or period set based on calendar information (information related to date and time) set in the control unit 8. The schedule information can be set arbitrarily, and for example, an operation time or period suitable for calculating the amount of heat (including sensible heat capacity and latent heat capacity) and the air conditioning capacity can be set.

[0126] In the inspection method of this embodiment, if it is determined in condition determination step S1 that the current time corresponds to the schedule information (operation time or period), maximum operation step S2, storage step S3, and calculation step S4 are executed. As a result, the inspection method of this embodiment can prevent calculation step S4 (including maximum operation step S2 and storage step S3) from being executed at an operation time or period that is not suitable for calculating air conditioning capacity (for example, spring or autumn). As a result, the inspection method of this embodiment can suppress unnecessary calculations of air conditioning capacity, making it possible to prevent the capacity of memory unit 23A from being overloaded.

[0127] The schedule information may be set only when a malfunction is found in the air conditioning of the central air-conditioning system 1. As a result, the inspection method of this embodiment can prevent calculation step S4 (including maximum operation step S2 and storage step S3) from being executed in a central air-conditioning system 1 where no malfunction is found, thereby suppressing unnecessary calculation of air-conditioning capacity, etc.

[0128] Although a particularly preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the illustrated embodiment and can be modified and implemented in various ways. [Explanation of symbols]

[0129] 1. Whole-building air conditioning system 2. Housing 5 Room 6. Air conditioner 7 Duct 8 Control Unit 14 Intake port 15 Air outlet Ac conditioned air

Claims

1. 1. A method for inspecting a central air conditioning system of a residence, the method comprising: an air conditioner; a duct for supplying air conditioned by the air conditioner to a plurality of rooms; and a control unit communicably connected to the air conditioner, a storage step in which the control unit acquires status information including at least the temperatures on the inlet side and the outlet side of the air conditioner and the blowout air volume, and stores the information in a storage unit; a calculation step in which the control unit calculates a heat quantity including at least a sensible heat capacity and a latent heat capacity of the air conditioner based on the stored situation information; a display step in which the control unit displays the calculated heat quantity and / or information obtained from the heat quantity; an inspection step in which the control unit inspects the central air-conditioning system, The inspection step includes a step of identifying, when the air conditioner is performing as originally expected, a cause of air conditioning obstruction present on the side of the house in which the central air-conditioning system is installed, based on the displayed heat quantity and / or information obtained from the heat quantity; Causes of impeding air conditioning on the residential side include when there is a weak point in the airtightness of the residential home, or when the return path of air from each room to the air conditioner is not sufficiently secured. How to inspect a whole-house air conditioning system.

2. The method further includes a maximum operation step in which the control unit operates the air conditioner in a maximum operation mode, The method for inspecting a central air-conditioning system according to claim 1 , wherein the calculation step calculates the amount of heat using the status information in the maximum operation mode.

3. The method for inspecting a central air-conditioning system according to claim 2 , wherein the control unit causes the air conditioner to perform the maximum operation step when the temperature on the air inlet side satisfies a predetermined condition.

4. 4. The method for inspecting a whole-building air conditioning system according to claim 1, wherein the display step displays at least one of a sensible heat ratio, which is the ratio of the sensible heat capacity to the air conditioning capacity, and a latent heat ratio, which is the ratio of the latent heat capacity to the air conditioning capacity.

5. 5. The method for inspecting a central air-conditioning system according to claim 1, wherein the calculation step is executed based on predetermined schedule information.

6. The method for inspecting a central air-conditioning system according to claim 1 , further comprising a heat quantity information storage step in which the control unit stores the calculated heat quantity in the storage unit.

7. A method for inspecting a whole-house air conditioning system of a residence including an air conditioner, a duct for supplying air conditioned by the air conditioner to a plurality of rooms, and a computer communicably connected to the air conditioner, the method comprising: causing the computer to execute the program; The computer, a storage step of acquiring status information including at least the temperatures on the inlet side and the outlet side of the air conditioner and the blowout air volume and storing the information in a storage unit; a calculation step of calculating a heat quantity including at least a sensible heat capacity and a latent heat capacity of the air conditioner based on the stored status information; a display step of displaying the calculated heat quantity and / or information obtained from the heat quantity; an inspection step of inspecting the central air-conditioning system, The inspection step includes a step of identifying, when the air conditioner is performing as originally expected, a cause of air conditioning obstruction present on the side of the house in which the central air-conditioning system is installed, based on the displayed heat quantity and / or information obtained from the heat quantity; Causes of impeding air conditioning on the residential side include when there is a weak point in the airtightness of the residential home, or when the return path of air from each room to the air conditioner is not sufficiently secured. program.

8. A whole-house air conditioning system for a home, An air conditioner, a duct for supplying air conditioned by the air conditioner to a plurality of rooms; a control unit communicatively connected to the air conditioner, The control unit includes a storage unit for storing status information including at least the temperatures of the air inlet side and the air outlet side of the air conditioner and the blowout air volume; a calculation unit for calculating a heat quantity including at least a sensible heat capacity and a latent heat capacity of the air conditioner based on the situation information; a display unit for displaying the heat quantity and / or information derived from the heat quantity; an inspection unit that inspects the whole-building air-conditioning system, When the air conditioner is performing as originally expected, the inspection unit identifies a cause of air conditioning obstruction present on the side of the house in which the central air-conditioning system is installed based on the displayed heat quantity and / or information obtained from the heat quantity, Causes of impeding air conditioning on the residential side include when there is a weak point in the airtightness of the residential home, or when the return path of air from each room to the air conditioner is not sufficiently secured. Air conditioning system throughout the building.

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