Air conditioner control method and program recording medium, and air conditioner control system and air conditioner

Abstract

An air conditioner control method includes a first acquisition step (ST1) in which a first temperature is acquired, the first temperature being a temperature of an object space of an indoor unit of an air conditioner, the air conditioner having the indoor unit and an outdoor unit, and a control step (ST2) in which operation of a compressor included in the outdoor unit is controlled based on the first temperature acquired in the first acquisition step (ST1), in the control step (ST2), when the first temperature exceeds a threshold value in the operation of the compressor, the compressor is stopped, and when the first temperature exceeds the threshold value in the stop of the compressor, the compressor is operated, the threshold value in the stop of the compressor and the threshold value in the operation of the compressor being different from each other.

Description

Technical Field

[0001] This disclosure relates to an air conditioning control method and program recording medium for controlling an air conditioner, as well as an air conditioning control system and an air conditioner. Background Technology

[0002] Patent document 1 discloses an air conditioner. During the period from when the difference between the room temperature and the set temperature reaches a predetermined value and the compressor stops (i.e., temperature control is off), to when the difference between the room temperature and the set temperature reaches a predetermined value and the compressor starts running (i.e., temperature control is on), the airflow direction changing mechanism controls the direction of the blown air to change by a predetermined value in the horizontal direction.

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2000-104978 Summary of the Invention

[0004] The problem that the invention aims to solve The purpose of this disclosure is to provide an air conditioning control method that easily suppresses the temperature variation of an object space.

[0005] Methods used to solve problems An air conditioning control method according to a technical solution of this disclosure includes a first acquisition step and a control step. In the first acquisition step, a first temperature is acquired, which is the temperature of the target space where an air conditioner equipped with an indoor unit and an outdoor unit is installed. In the control step, the operation of a compressor in the outdoor unit is controlled based on the first temperature acquired in the first acquisition step. In the control step, the compressor is stopped when the first temperature exceeds a threshold during compressor operation, and the compressor is activated when the first temperature exceeds the threshold during compressor shutdown. The threshold values ​​during compressor shutdown and compressor operation are different from each other.

[0006] A program recording medium relating to a technical solution of this disclosure records a program that causes one or more processors to execute the above-described air conditioning control method.

[0007] An air conditioning control system according to a technical solution of this disclosure includes a first acquisition unit and a control unit. The first acquisition unit acquires a first temperature, which is the temperature of the target space where an air conditioner having an indoor unit and an outdoor unit is installed. The control unit controls the operation of a compressor in the outdoor unit based on the first temperature acquired by the first acquisition unit. The control unit stops the compressor when the first temperature exceeds a threshold during compressor operation, and starts the compressor when the first temperature exceeds the threshold during compressor shutdown. The threshold during compressor shutdown and the threshold during compressor operation are different from each other.

[0008] An air conditioner according to a technical solution of this disclosure includes: the aforementioned air conditioning control system; the aforementioned indoor unit, which is disposed in the aforementioned target space; and the aforementioned outdoor unit, which is disposed outside the aforementioned target space.

[0009] Invention Effects According to the air conditioning control method disclosed herein, there is an advantage in easily suppressing the temperature variation range of the target space. Attached Figure Description

[0010] Figure 1 This is an explanatory diagram illustrating the control example of the compressor in a comparative air conditioner.

[0011] Figure 2 It is a block diagram showing the overall structure, including the air conditioning control system of the implementation method.

[0012] Figure 3 This is an explanatory diagram illustrating a control example of the compressor in an air conditioning control system according to an implementation method.

[0013] Figure 4A This is a diagram illustrating the relationship between the indoor unit's suction temperature and the outside temperature when the compressor is operating during the air conditioner's heating mode.

[0014] Figure 4B This is a diagram illustrating the relationship between the indoor unit's suction temperature and the outside temperature when the compressor is stopped during the air conditioner's heating operation.

[0015] Figure 5 This is a flowchart illustrating an example of the operation of an air conditioning control system according to an implementation method.

[0016] Figure 6 This is a block diagram showing the overall structure, including the air conditioning control system of the first variation of the implementation.

[0017] Figure 7 This is a block diagram showing the overall structure, including the air conditioning control system of the second variation of the implementation. Detailed Implementation

[0018] (The understanding that forms the basis of this disclosure) First, the inventor's perspective will be explained below.

[0019] Traditionally, air conditioners with indoor and outdoor units have the indoor unit located in the target space and the outdoor unit located outdoors. The temperature of the target space is adjusted by controlling the operation of the compressor in the outdoor unit. In such air conditioners, the compressor is activated or deactivated based on a comparison between the suction temperature of the indoor unit and a threshold corresponding to the set temperature. Hereafter, unless otherwise specified, the term "suction temperature" simply refers to the "suction temperature of the indoor unit."

[0020] Figure 1 This is an explanatory diagram illustrating the control example of the compressor in a comparative air conditioner. In Figure 1 In the example shown, it is assumed that the air conditioner in the comparative example is operating in heating mode. Figure 1 As shown, in the comparative example air conditioner, if the intake temperature is lower than the threshold Th0 when the compressor is stopped, heated air is supplied to the target space by activating the compressor. This causes the temperature of the target space (intake temperature) to rise. Furthermore, in the comparative example air conditioner, if the intake temperature is higher than the threshold Th0 when the compressor is running, the supply of heated air to the target space is stopped by stopping the compressor. This causes the temperature of the target space to decrease. By repeatedly performing the above control procedures, the temperature of the target space in the comparative example air conditioner is adjusted to approximately the set temperature.

[0021] Here, when the compressor is restarted while it is stopped, the heated air is not immediately supplied to the target space. Therefore, as... Figure 1 As shown in the period T1, there is a delay from the time the compressor is activated until the temperature of the target space (suction temperature) rises. Similarly, if the compressor is stopped during operation, the supply of heated air to the target space does not immediately cease. Therefore, as... Figure 1 As shown in period T2, there is a delay from the point when the compressor is stopped until the temperature of the object space drops.

[0022] Therefore, for the comparative example air conditioner, such as Figure 1As shown, the temperature variation range (suction temperature) of the target space, W1, becomes relatively large, specifically, it can be several degrees Celsius or more. The variation range W1 is represented by, for example, a representative value (e.g., an average value) of the difference between the maximum and minimum temperatures of the target space over a certain period. This phenomenon of a large variation range W1 occurs not only when an air conditioner with excessively large operating performance (cooling and heating capacity) relative to the size of the target space is installed, but also when an air conditioner with operating performance suitable for the size of the target space is installed.

[0023] In view of the above, the inventors made this disclosure.

[0024] Hereinafter, embodiments will be described in detail with appropriate reference to the accompanying drawings. However, there are instances where necessary detailed descriptions have been omitted. For example, detailed descriptions of already known matters or repetitive descriptions of substantially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art.

[0025] Furthermore, the specified values ​​(e.g., the first temperature described later) will be compared with the threshold values ​​below. However, in the comparison, the threshold value may be included in the branch conditions of one side or the branch conditions of the other side. For example, the branch condition of one side that "the specified value is higher (or lower) than the threshold value" may also be referred to as "the specified value is above (or below) the threshold value".

[0026] Furthermore, the inventors have provided drawings and the following description in order to enable those skilled in the art to fully understand this disclosure, but these are not intended to limit the subject matter of the claims.

[0027] (Implementation Method) [1-1. Overall Structure] First, use Figure 2 The overall structure, including the air conditioning control system 100 according to the relevant implementation method, will be described. Figure 2 This is a block diagram showing the overall structure, including the air conditioning control system 100 according to the relevant implementation method. The air conditioning control system 100 is a system used to control the air conditioner 2, which is set up to adjust the temperature of the target space 4.

[0028] Here, the object space 4 is, for example, a room, referring to a relatively large area within facility 5 whose temperature is regulated by air conditioner 2. That is, the object space 4 is essentially an enclosed space within facility 5. Alternatively, the object space 4 may not be a completely enclosed space relative to the space outside facility 5; for example, it may be connected to the space outside facility 5 via one or more doors at the entrance of facility 5 and one or more windows on the outer wall of facility 5.

[0029] Facility 5 includes, for example, residential facilities such as detached houses or apartment buildings. In addition, facility 5 is not limited to residential facilities; for example, it can also include shops such as convenience stores or supermarkets, as well as non-residential facilities such as offices, schools, welfare facilities, hospitals, and factories.

[0030] Air conditioner 2 includes an indoor unit 31 and an outdoor unit 32, with the indoor unit 31 installed in the target space 4. The indoor unit 31 and the outdoor unit 32 are connected to each other via a refrigerant pipe P1. In this embodiment, air conditioner 2 is capable of both cooling and heating operations. Furthermore, air conditioner 2 can be a dedicated cooling unit or a dedicated heating unit.

[0031] The indoor unit 31 is, for example, a ceiling-mounted type, installed in the ceiling of the target space 4. However, the indoor unit 31 is not limited to the ceiling-mounted type; it can also be a ceiling-mounted type, a wall-mounted type, or a floor-mounted type. The indoor unit 31 includes a fan 311 that supplies cool or warm air to the target space 4, and a heat exchanger 312. During cooling operation, the heat exchanger 312 functions as an evaporator that absorbs ambient heat to evaporate the liquid refrigerant; during heating operation, it functions as a condenser that releases heat from the gaseous refrigerant to liquefy it.

[0032] Outdoor unit 32 is located outside facility 5. Outdoor unit 32 includes a fan 321, a heat exchanger 322, a compressor 323, a four-way valve 324, and an expansion valve 325. The fan 321 directs air to the heat exchanger 322. The heat exchanger 322 functions as a condenser during cooling operation and as an evaporator during heating operation. The compressor 323 draws in and compresses gaseous refrigerant, increasing its pressure. The four-way valve 324 reverses the flow of refrigerant during both cooling and heating operation. The expansion valve 325 causes the liquid refrigerant to expand, decreasing its pressure.

[0033] [1-2. Air Conditioning Control System] Next, the details of the air conditioning control system 100 will be explained. The air conditioning control system 100 is as follows: Figure 2 As shown, the system includes a first acquisition unit 11, a second acquisition unit 12, a communication unit 13, a control unit 14, and a storage unit 15. However, in some embodiments, the air conditioning control system 100 may only need to include the first acquisition unit 11 and the control unit 14, and may not require other components. For example, the other components described above can be implemented using a different system than the air conditioning control system 100.

[0034] In this embodiment, the air conditioning control system 100 is implemented by a controller 101 installed in the facility 5. The controller 101 can be installed either inside or outside the object space 4. The controller 101 is connected to the indoor unit 31 and outdoor unit 32 of the air conditioner 2 via signal lines. Furthermore, the controller 101 communicates with the indoor unit 31 of the air conditioner 2 via signal lines. In addition, the controller 101 communicates with the outdoor unit 32 of the air conditioner 2 via signal lines.

[0035] The controller 101 has a processor and a memory, and performs various functions by executing computer programs stored in the memory by the processor. In this embodiment, the memory is a storage unit 15.

[0036] The first acquisition unit 11 (in the first acquisition step ST1) acquires a first temperature, which is the temperature of the target space 4 where the indoor unit 31 of the air conditioner 2 is installed. In this embodiment, the first temperature is the intake temperature of the indoor unit 31 of the air conditioner 2. The intake temperature can be detected, for example, by a temperature sensor installed on the indoor unit 31. The first acquisition unit 11 communicates with the temperature sensor, for example, via a communication unit 13, and receives the detection result from the temperature sensor to acquire the first temperature. Furthermore, the first temperature is not limited to the intake temperature of the indoor unit 31; it can also be a temperature obtained from a temperature sensor installed inside the target space 4, for example.

[0037] The second acquisition unit 12 (in the second acquisition step ST3) acquires a second temperature, which is the ambient temperature. In this embodiment, the second temperature is the intake temperature of the outdoor unit 32 of the air conditioner 2. The intake temperature can be detected, for example, by a temperature sensor installed outside the facility 5, which includes the object space 4. The second acquisition unit 12 communicates with the temperature sensor via the communication unit 13, and receives the detection result from the temperature sensor to acquire the second temperature. Furthermore, the second temperature is not limited to the ambient temperature of the facility 5. For example, the second acquisition unit 12 can also communicate with a server providing weather information via the communication unit 13 to acquire weather information for the area where the facility 5 is located, thereby acquiring the temperature of that area as the second temperature.

[0038] The communication unit 13 has a communication interface for communicating with the indoor unit 31 and outdoor unit 32 of the air conditioner 2 via a signal line. The communication unit 13 sends signals containing commands to the indoor unit 31 and outdoor unit 32 via the signal line. The indoor unit 31 and outdoor unit 32 operate according to the commands. Alternatively, the communication unit 13 may also have a wireless communication interface for wireless communication with a user-held information terminal or a remote control for the air conditioner 2. The information terminal may be a portable terminal such as a smartphone or tablet computer. In this case, the communication unit 13 can also relay commands sent from the information terminal (or remote control) by the user to the indoor unit 31 and outdoor unit 32. In this case, the user can remotely control the air conditioner 2 using the information terminal or remote control.

[0039] The control unit 14 adjusts the temperature of the target space 4 by controlling the air conditioner 2. In this embodiment, the air conditioner 2 is controlled by sending a signal containing instructions to the indoor unit 31 and outdoor unit 32 of the air conditioner 2 via a signal line. More specifically, the control unit 14 (in control step ST2) controls the operation of the compressor 323 of the outdoor unit 32 based on the first temperature (suction temperature) obtained by the first acquisition unit 11 (first acquisition step ST1). As a result, the control unit 14 adjusts the temperature of the target space 4 to maintain the temperature of the target space 4 at the set temperature. The set temperature can be appropriately set by the user using an information terminal or a remote control, for example.

[0040] In this embodiment, the control unit 14 is capable of controlling both the air conditioner 2 to operate in cooling mode and the air conditioner 2 to operate in heating mode. Furthermore, in both cooling and heating modes, it can execute two operating modes (first operating mode and second operating mode) as shown below. The control unit 14 can be operated in either the first or second operating mode, for example, by a user making appropriate settings using an information terminal or remote control.

[0041] Figure 3 This is an explanatory diagram showing a control example of the compressor 323 of the air conditioning control system 100 in an embodiment. Figure 3 This is a control example when air conditioner 2 is operating in heating mode. Figure 3 In the diagram, the dashed line graph represents the change of the first temperature (inhalation temperature) when the control unit 14 operates in the first operating mode, and the solid line graph represents the change of the first temperature when the control unit 14 operates in the second operating mode.

[0042] In addition, Figure 3 In order to easily identify the control of compressor 323 in the second operating mode, the solid line graph is enlarged for illustration. Therefore, Figure 3The temperature variation W1 of the object space 4 shown is larger than the actual temperature variation W1 of the object space 4. The actual temperature variation W1 of the object space 4 is, for example, around a few tenths of a degree Celsius.

[0043] In the first operating mode, the control unit 14, as Figure 3 As shown, the first temperature (inhalation temperature) is compared with a threshold Th0, and the operation of the compressor 323 is switched according to the comparison result. That is, in the first operating mode, the control unit 14 controls the operation of the compressor 323 in the same way as the air conditioner in the comparative example. The threshold Th0 is determined according to the set temperature. For example, the storage unit 15 stores data that establishes a correspondence between the set temperature and the threshold Th0. Furthermore, the control unit 14 reads the threshold Th0 corresponding to the set temperature from the storage unit 15 and determines the threshold Th0 to be used in the first operating mode.

[0044] Specifically, in such Figure 3 When the air conditioner 2 is operating in heating mode, if the first temperature (suction temperature) is higher than the threshold Th0 while the compressor 323 is operating, the control unit 14 stops the compressor 323. If the first temperature is lower than the threshold Th0 while the compressor 323 is stopped, the control unit 14 starts the compressor 323. Furthermore, when the air conditioner 2 is operating in cooling mode, if the first temperature is lower than the threshold Th0 while the compressor 323 is operating, the control unit 14 stops the compressor 323. If the first temperature is higher than the threshold Th0 while the compressor 323 is stopped, the control unit 14 starts the compressor 323.

[0045] In the second operating mode, similar to the first operating mode, the control unit 14 compares the first temperature (suction temperature) with a threshold and switches the operation of the compressor 323 based on the comparison result. That is, in the second operating mode, for example, when the air conditioner 2 is operating in heating mode, the control unit 14 (in control step ST2) stops the compressor 323 when the first temperature is higher than (exceeds) the threshold while the compressor 323 is operating, and starts the compressor 323 when the first temperature is lower than (exceeds) the threshold while the compressor 323 is stopped. On the other hand, unlike the first operating mode, in the second operating mode, the threshold for when the compressor 323 is stopped and the threshold for when the compressor 323 is operating are different. Hereinafter, the threshold for when the compressor 323 is stopped will be defined as "first threshold Th1", and the threshold for when the compressor 323 is operating will be defined as "second threshold Th2".

[0046] Specifically, in such Figure 3When the air conditioner 2 is operating in heating mode as shown, the control unit 14 stops the compressor 323 when the first temperature is higher than (exceeds) the second threshold Th2 during compressor 323 operation, and starts the compressor 323 when the first temperature is lower than (exceeds) the first threshold Th1 during compressor 323 operation. Furthermore, when the air conditioner 2 is operating in heating mode, the threshold (first threshold Th1) during compressor 323 operation is higher than the threshold (second threshold Th2) during compressor 323 operation.

[0047] Furthermore, when the air conditioner 2 is operating in cooling mode, the control unit 14 stops the compressor 323 when the first temperature is lower than (exceeds) the second threshold Th2 during compressor 323 operation, and starts the compressor 323 when the first temperature is higher than (exceeds) the first threshold Th1 during compressor 323 operation. Then, when the air conditioner 2 is operating in cooling mode, the threshold (first threshold Th1) during compressor 323 operation is lower than the threshold (second threshold Th2) during compressor 323 operation.

[0048] In this implementation, the thresholds (first threshold Th1 and second threshold Th2) are determined based on the amount of change in the first temperature (absorption temperature) per unit time. That is, in this implementation, the thresholds are determined such that the greater the slope of the change in the first temperature, the earlier the switching of compressor 323's operation is executed. For example, when the air conditioner 2 is operating in heating mode, a greater amount of change in the first temperature per unit time results in a higher first threshold Th1 and a lower second threshold Th2.

[0049] Furthermore, in the implementation, the thresholds (first threshold Th1 and second threshold Th2) are determined based on the delay time (delay time) of the positive-to-negative reversal of the change in the first temperature (suction temperature) per unit time from the time when the operation of the compressor 323 is switched to the second. Here, a rise in the first temperature is defined as a positive change, and a fall in the first temperature is defined as a negative change. Thus, for example, if the air conditioner 2 is operating in heating mode, the delay time is equivalent to the time required from the time the air conditioner 2 switches from the stop state to the operating state until the first temperature changes from a fall to a rise (from negative to positive) (see reference). Figure 3 During the period T12). Similarly, for example, if air conditioner 2 is operating in heating mode, the delay time is equivalent to the time required from the moment air conditioner 2 switches from the operating state to the stopped state until the first temperature changes from rising to falling (from positive to negative) (refer to...). Figure 3 During the period T11).

[0050] That is, in the implementation, the longer the time until the switching of compressor 323 operation is reflected in the first temperature (suction temperature), the earlier the switching of compressor 323 operation is performed, the higher the threshold is determined. For example, when the air conditioner 2 is in heating operation, the longer the delay time, the higher the first threshold Th1 and the lower the second threshold Th2.

[0051] Furthermore, in this embodiment, the thresholds (first threshold Th1 and second threshold Th2) are determined based on the second temperature (outdoor air temperature) obtained by the second acquisition unit 12 (second acquisition step ST3). Here, using Figure 4A and Figure 4B The relationship between ambient temperature and the first temperature (inhalation temperature) is explained.

[0052] Figure 4A This is an explanatory diagram showing the relationship between the suction temperature of the indoor unit 31 and the outside temperature when the compressor 323 is operating during the heating mode of air conditioner 2. Figure 4A During this process, because compressor 323 is operating, the suction temperature rises over time. Furthermore, in... Figure 4A In the graph, the outside temperature represented by a dashed line is lower than the inhalation temperature represented by a solid line. For example... Figure 4A As shown, the lower the outside temperature, the more difficult it is for the temperature (absorption temperature) of object space 4 to rise.

[0053] Figure 4B This is a diagram illustrating the relationship between the suction temperature of the indoor unit 31 and the outside temperature when the compressor 323 is stopped during the heating operation of air conditioner 2. Figure 4B During this process, because compressor 323 is stopped, the suction temperature decreases over time. Furthermore, in... Figure 4B In the graph, the outside temperature represented by a dashed line is lower than the inhalation temperature represented by a solid line. For example... Figure 4B As shown, the lower the outside temperature, the easier it is for the temperature (absorption temperature) of object space 4 to drop.

[0054] Thus, the change in the first temperature (inhalation temperature) per unit time corresponds to the change in the outside temperature. Therefore, in the implementation, for example, if the air conditioner 2 is operating in heating mode, the lower the outside temperature, the higher the second threshold Th2, and the higher the first threshold Th1.

[0055] In this embodiment, the control unit 14 periodically updates the thresholds (first threshold Th1 and second threshold Th2) based on the second temperature (outdoor air temperature) obtained by the second acquisition unit 12. Thus, in this embodiment, the control unit 14 suppresses the variation range W1 of the temperature (inhalation temperature) of the object space 4 by using appropriate thresholds according to changes in the outside air temperature during operation in the second operation mode.

[0056] Similar to the operation in the first operation mode, the control unit 14 reads the thresholds (first threshold Th1 and second threshold Th2) from the storage unit 15, thereby determining the thresholds to be used in the second operation mode. Here, for example, the thresholds stored in the storage unit 15 are prepared as follows.

[0057] That is, before starting the operation of the air conditioning control system 100, the outside air temperature, the change in the first temperature (inhalation temperature) per unit time in the first operating mode, and the delay time are actually measured. Multiple datasets are prepared by combining these measured values ​​into one dataset. Furthermore, using these multiple datasets, machine learning and other methods are used to determine thresholds (first threshold Th1 and second threshold Th2) that ensure the change in the temperature (inhalation temperature) of the object space 4 in the second operating mode is within a specified range. Thus, data is generated that correlates the outside air temperature, the change in the first temperature per unit time, and the delay time with the thresholds. The generated data is stored in the storage unit 15.

[0058] Alternatively, the learned model after machine learning can be stored in the storage unit 15 instead of the data. In this case, the control unit 14 can determine the thresholds (first threshold Th1 and second threshold Th2) by inputting the first temperature obtained by the first acquisition unit 11 into the learned model.

[0059] As described above, in the second operating mode, considering the time required for the switching of compressor 323's operation to be reflected in the temperature (suction temperature) of the target space 4, the control unit 14 controls the switching of compressor 323's operation. Therefore, when the control unit 14 operates in the second operating mode, the temperature change W1 of the target space 4 is suppressed compared to when the control unit 14 operates in the first operating mode (see reference). Figure 3 ).

[0060] Furthermore, in the embodiment, the control unit 14 uses two thresholds, the first threshold Th1 and the second threshold Th2, during the operation of the second operation mode, but it is not limited to this. For example, the control unit 14 may also change one threshold to correspond to the operating state of the compressor 323 during the operation of the second operation mode, thereby realizing the first threshold Th1 and the second threshold Th2.

[0061] The storage unit 15 is a storage device for information (computer programs, etc.) required by the processor of the storage controller 101 to perform various controls. The storage unit 15 is implemented, for example, by a semiconductor memory, but is not particularly limited and can use a known electronic information storage mechanism. The storage unit 15 stores data, etc., related to the respective thresholds of the first operating mode and the second operating mode.

[0062] [2. Action] The following uses Figure 5 The operation (i.e., the air conditioning control method) of the air conditioning control system 100 configured as described above will be explained. Figure 5 This is a flowchart illustrating an operation example of the air conditioning control system 100 according to an embodiment. The following describes the situation where the air conditioner 2 is operating in heating mode, and the control unit 14 operates in the second operating mode. Furthermore, in Figure 5 In the code, the operation of compressor 323 is represented as "compressor: on", and the shutdown of compressor 323 is represented as "compressor: off".

[0063] First, if the control unit 14 starts operating in the second operating mode, it activates the compressor 323 (S1). As a result, heated air is supplied to the target space 4, and the first temperature (suction temperature) rises. Process S1 corresponds to part of the control step ST2 of the air conditioning control method. Furthermore, the first acquisition unit 11 periodically acquires the first temperature (S2). Process S2 corresponds to the first acquisition step ST1 of the air conditioning control method.

[0064] During compressor 323 operation, control unit 14 compares the first temperature (suction temperature) obtained by first acquisition unit 11 with a second threshold Th2. If the first temperature is not higher than the second threshold Th2 (S3: No), compressor 323 continues to operate. Conversely, if the first temperature is higher than the second threshold Th2 (S3: Yes), control unit 14 stops compressor 323 (S4). This stops the supply of heated air to the target space 4, causing the rise in the first temperature to level off and eventually begin to fall. Processing S3 and S4 corresponds to part of control step ST2 of the air conditioning control method.

[0065] The first acquisition unit 11 also periodically acquires the first temperature (inhalation temperature) in the same manner as described above (S5) when the compressor 323 stops. Processing S5 is equivalent to the first acquisition step ST1 of the air conditioning control method.

[0066] During compressor 323 shutdown, control unit 14 compares the first temperature (suction temperature) obtained by first acquisition unit 11 with a first threshold Th1. If the first temperature is not lower than the first threshold Th1 (S6: No), compressor 323 continues to stop. Conversely, if the first temperature is lower than the first threshold Th1 (S6: Yes), control unit 14 activates compressor 323 (S7). This supplies heated air to the target space 4, causing the decrease in the first temperature to become gradual and eventually reverse, eventually leading to an increase in the first temperature. Processes S6 and S7 correspond to part of control step ST2 of the air conditioning control method.

[0067] Here, starting from the second operation mode, after a predetermined time (e.g., 10 minutes) elapses (S8: Yes), the second acquisition unit 12 acquires the second temperature (outdoor air temperature) (S9). Processing S9 is equivalent to the second acquisition step ST3 of the air conditioning control method. Furthermore, based on the second temperature acquired by the second acquisition unit 12, the control unit 14 updates the thresholds (first threshold Th1 and second threshold Th2) (S10). In addition, for example, if the second temperature does not change before and after the predetermined time has elapsed, there may be a case where the control unit 14 does not update the thresholds and maintains the current value.

[0068] The above-described series of processes are repeated during the period when the power supply to the controller 101 is on, that is, during the period when the operation in the second operation mode performed by the control unit 14 continues (S11: No). Furthermore, if the power supply to the controller 101 is turned off (S11: Yes), the operation in the second operation mode performed by the control unit 14 ends.

[0069] [3. Advantages, etc.] The advantages of the air conditioning control system 100 (air conditioning control method) according to the embodiments are described below.

[0070] As already described, in the comparative example air conditioner, the compressor operation is switched based on a comparison between a single threshold and the temperature of the target space (suction temperature). Therefore, in the comparative example air conditioner, there is a problem that the switching of compressor operation is prone to delay until it is reflected in the temperature of the target space, and the temperature change W1 of the target space is prone to become large.

[0071] In contrast, in the air conditioning control system 100 (air conditioning control method) of the relevant embodiment, the threshold for stopping the compressor 323 is different from the threshold for operating the compressor 323. Therefore, in the air conditioning control system 100 (air conditioning control method) of the relevant embodiment, compared with the air conditioner of the comparative example, the delay from the switching of the compressor 323's operation until it is reflected in the temperature (suction temperature) of the target space 4 is less likely to occur, thus having the advantage of easily suppressing the temperature change amplitude W1 of the target space 4.

[0072] Specifically, compared to the comparative example air conditioner where the temperature (suction temperature) variation W1 in the target space 4 easily exceeds several degrees Celsius, the air conditioning control system 100 (air conditioning control method) of the relevant embodiment can suppress the variation W1 to within a few tenths of a degree Celsius. Therefore, compared to the comparative example air conditioner, the air conditioning control system 100 (air conditioning control method) of the relevant embodiment has the advantage that users are less likely to notice temperature changes in the target space 4 and are less likely to feel uncomfortable.

[0073] In particular, in this embodiment, the target space 4 is the user's bedroom, and the action (control step ST2) performed by the control unit 14 in the second operation mode is preferably executed when the user is asleep. Here, the user can adjust the set temperature based on the temperature (inhalation temperature) of the target space 4 when awake, but cannot adjust the set temperature while asleep (unconscious). Therefore, if the temperature change W1 of the target space 4 increases during sleep, the user may unconsciously feel uncomfortable. In addition, there are individual differences in the change of perceived temperature during sleep, but users who are more dissatisfied with their sleep environment are more sensitive to changes in perceived temperature.

[0074] Therefore, if the control unit 14 performs the action in the second action mode when the user goes to sleep, it has the advantage of easily providing the user with a comfortable sleep environment by suppressing the temperature change amplitude W1 of the object space 4.

[0075] Alternatively, the control unit 14 can operate in the second operation mode regardless of whether the user is asleep, meaning that control step ST2 is always executed while the air conditioner 2 is running. However, it can also execute control step ST2 only when the user is asleep. In this case, for example, if the user operates an information terminal or similar device to instruct the start of control during sleep, the control unit 14 will begin the operation in the second operation mode (control step ST2). Furthermore, for example, the detection results of a human body sensor that detects whether the user is in bed can be monitored, and if the user is detected to be in bed, the control unit 14 will automatically begin the operation in the second operation mode (control step ST2).

[0076] (Modified example) As illustrated above, embodiments have been described as examples of the technology disclosed in this application. However, the technology disclosed herein is not limited to this, and can be applied to embodiments obtained by appropriate modifications, substitutions, additions, omissions, etc. Furthermore, new embodiments can be created by combining the constituent elements described in the above embodiments.

[0077] Therefore, the following are examples of variations of the implementation method.

[0078] [Example 1] Figure 6 This is a block diagram showing the overall structure, including the air conditioning control system 100A of the first modified embodiment. For example... Figure 6 As shown, in the first modification, the air conditioning control system 100A is built into the indoor unit 31 of the air conditioner 2. That is, the air conditioner 2 includes the air conditioning control system 100A, the indoor unit 31 installed in the target space 4, and the outdoor unit 32 installed outside the target space 4. Furthermore, in Figure 6 Although not illustrated, controller 101 is installed in facility 5. Thus, the air conditioning control system 100A can be either built into controller 101 or built into air conditioner 2.

[0079] [Second variation] Figure 7 This is a block diagram showing the overall structure, including the air conditioning control system 100B of the second variation of the relevant implementation. (As shown) Figure 7 As shown, in the second modification, the air conditioning control system 100B is built into a server 102 remotely located away from facility 5. Furthermore, in the second modification, the air conditioning control system 100B individually controls one or more air conditioners 2 installed in multiple facilities 5. That is, the air conditioning control system 100B individually controls multiple air conditioners 2. Communication between the server 102 and each air conditioner 2 is conducted, for example, via an external network such as the Internet. Thus, the air conditioning control system 100B can be either built into the controller 101 or built into the server 102.

[0080] [Other variations] In this implementation, when the control unit 14 operates in the second operating mode during the day, the thresholds (first threshold Th1 and second threshold Th2) can also be determined based on, for example, the amount of sunlight in the object space 4, or the opening and closing of the curtains installed in the object space 4. This is because these parameters can also contribute to the temperature (absorption temperature) of the object space 4 during the day.

[0081] In this implementation, the thresholds (the first threshold Th1 and the second threshold Th2) can also be determined by taking into account the size of the object space 4 and the cooling and heating capacity of the air conditioner 2. This is because these parameters can also contribute to the temperature (absorption temperature) of the object space 4.

[0082] In the implementation, the thresholds (first threshold Th1 and second threshold Th2) are determined through machine learning or other means before the air conditioning control system 100 is operated, but are not limited to this. For example, the thresholds may also be relearned during the operation of the air conditioning control system 100 using the outside air temperature, the change in the first temperature (inhalation temperature) per unit time in the first operating mode, and the measured value of the delay time.

[0083] In this implementation, the thresholds (first threshold Th1 and second threshold Th2) are determined based on a second temperature (outdoor temperature), but they may also be determined without being based on a second temperature. In this case, the thresholds (first threshold Th1 and second threshold Th2) may not be updated periodically. Furthermore, in this case, the air conditioning control system 100 may not have a second acquisition unit 12. In other words, the air conditioning control method may not perform the second acquisition step ST3.

[0084] In this implementation, the thresholds (the first threshold Th1 and the second threshold Th2) are determined based on the change in the second temperature (outdoor air temperature) and the first temperature (inhalation temperature) per unit time and the delay time, but are not limited to these. For example, the thresholds can be determined based on one or more of these three parameters.

[0085] In this implementation, the communication between the air conditioning control system 100 and the indoor unit 31 and outdoor unit 32 of the air conditioner 2 is wired communication using signal lines, but it can also be wireless communication. For example, the communication standard between the air conditioning control system 100 and the indoor unit 31 and outdoor unit 32 can also be Wi-Fi (registered trademark) or BLE (Bluetooth (registered trademark) LowEnergy), etc.

[0086] Furthermore, while the air conditioning control system 100 is implemented as a single device in the above embodiment, it can also be implemented using multiple devices. When the air conditioning control system 100 is implemented using multiple devices, the components of the air conditioning control system 100 can be distributed among the multiple devices in any way. For example, some of the components of the air conditioning control system 100 in the above embodiment can be equipped in a server. That is, this disclosure can also be implemented using cloud computing or edge computing.

[0087] Furthermore, as in the above embodiments, all or part of the constituent elements of the air conditioning control system 100 of this disclosure may be constructed by dedicated hardware, or may be implemented by executing software programs suitable for each constituent element. Each constituent element may also be implemented by a program execution unit such as a CPU (Central Processing Unit) or processor reading and executing software programs recorded on recording media such as HDD (Hard Disk Drive) or semiconductor memory.

[0088] Furthermore, the components of the air conditioning control system 100 disclosed herein may also consist of one or more electronic circuits. These electronic circuits may be either general-purpose circuits or dedicated circuits.

[0089] In one or more electronic circuits, such as semiconductor devices, integrated circuits (ICs) or large-scale integration (LSIs) can be included. ICs or LSIs can be integrated onto a single chip or multiple chips. Here, it is referred to as LSI or IC, but depending on the degree of integration, it can be called system LSI, VLSI (very large-scale integration), or ULSI (ultra large-scale integration). Furthermore, FPGAs (Field Programmable Gate Arrays), which can be programmed after LSI fabrication, can also be used for the same purpose.

[0090] Furthermore, the general or specific form of this disclosure can also be implemented by a system, apparatus, method, integrated circuit, or computer program. Alternatively, it can be implemented by a computer-readable non-transitory recording medium such as an optical disc, HDD, or semiconductor memory storing the computer program. For example, this disclosure can also be implemented as a program for executing the air conditioning control method of the above embodiments by a computer. In addition, the program can be recorded on a computer-readable non-transitory recording medium such as a CD-ROM, or distributed via communication lines such as the Internet.

[0091] As illustrated above, embodiments of the present disclosure have been described. To this end, accompanying drawings and detailed descriptions are provided.

[0092] Therefore, the constituent elements described in the accompanying drawings and detailed descriptions include not only those essential for solving the problem, but also those that are not essential for solving the problem but are used to illustrate the aforementioned technology. Thus, the mere presence of these non-essential constituent elements in the accompanying drawings or detailed descriptions should not automatically render them essential.

[0093] Furthermore, the above-described embodiments are used to illustrate the technology of this disclosure, and therefore various changes, substitutions, additions, omissions, etc., can be made within the scope of the claims or their equivalents.

[0094] (Summarize) As described above, the air conditioning control method of the embodiment includes a first acquisition step ST1 and a control step ST2. In the first acquisition step ST1, a first temperature is acquired, which is the temperature of the target space 4 where the indoor unit 31 of the air conditioner 2 is installed. The air conditioner 2 has an indoor unit 31 and an outdoor unit 32. In the control step ST2, the operation of the compressor 323 of the outdoor unit 32 is controlled based on the first temperature acquired in the first acquisition step ST1. In the control step ST2, when the first temperature exceeds a threshold (second threshold Th2) during compressor 323 operation, the compressor 323 is stopped; when the first temperature exceeds a threshold (first threshold Th1) during compressor 323 stoppage, the compressor 323 is operated. The threshold (first threshold Th1) during compressor 323 stoppage and the threshold (second threshold Th2) during compressor 323 operation are different from each other.

[0095] Therefore, it is less likely that there will be a delay in the switching of the compressor 323 until the temperature of the object space 4 is reflected, thus it has the advantage of easily suppressing the temperature change amplitude W1 of the object space 4.

[0096] Furthermore, for example, in an air conditioning control method, when the air conditioner 2 is operating in heating mode, the threshold (first threshold Th1) when the compressor 323 stops is higher than the threshold (second threshold Th2) when the compressor 323 is operating.

[0097] Therefore, it has the advantage of easily suppressing the temperature change W1 of the target space 4 during the heating operation of the air conditioner 2.

[0098] Furthermore, for example, in an air conditioning control method, when the air conditioner 2 is operating in cooling mode, the threshold (first threshold Th1) when the compressor 323 stops is lower than the threshold (second threshold Th2) when the compressor 323 is operating.

[0099] Therefore, it has the advantage of easily suppressing the temperature change W1 of the target space 4 during the cooling operation of the air conditioner 2.

[0100] Furthermore, for example in air conditioning control methods, thresholds (first threshold Th1 and second threshold Th2) are determined based on the amount of change in the first temperature per unit time.

[0101] Therefore, by considering the change in temperature per unit time of the first temperature to determine the threshold, it is easier to suppress the temperature change amplitude W1 of the object space 4.

[0102] Furthermore, for example, in an air conditioning control method, thresholds (first threshold Th1 and second threshold Th2) are determined based on the delay time from the point when the operation of compressor 323 is switched to the point when the change in the first temperature per unit time reverses from positive to negative.

[0103] Therefore, by taking into account the delay time to determine the threshold, it is easier to suppress the temperature change amplitude W1 of the object space 4.

[0104] Furthermore, for example, the air conditioning control method also includes a second acquisition step ST3 to obtain a second temperature, which is the outside air temperature. Thresholds (a first threshold Th1 and a second threshold Th2) are determined based on the second temperature obtained in the second acquisition step ST3.

[0105] Therefore, by considering the second temperature to determine the threshold, it is easier to suppress the temperature variation W1 of the object space 4.

[0106] Furthermore, for example, in an air conditioning control method, object space 4 is the bedroom where the user sleeps. Control step ST2 is executed when the user goes to sleep.

[0107] Therefore, it has the advantage of easily prompting users to have a comfortable sleep environment.

[0108] Furthermore, the implementation method includes a program recording medium that records a program that causes one or more processors to execute the air conditioning control method described above.

[0109] Therefore, it is less likely that there will be a delay in the operation of the compressor 323 until the temperature of the object space 4 is reflected, thus it has the advantage of easily suppressing the temperature change amplitude W1 of the object space 4.

[0110] Furthermore, the air conditioning control systems 100, 100A, and 100B of the embodiments include a first acquisition unit 11 and a control unit 14. The first acquisition unit 11 acquires a first temperature, which is the temperature of the target space 4 where the indoor unit 31 of the air conditioner 2 is installed. The air conditioner 2 includes an indoor unit 31 and an outdoor unit 32. The control unit 14 controls the operation of the compressor 323 of the outdoor unit 32 based on the first temperature acquired by the first acquisition unit 11. The control unit 14 stops the compressor 323 when the first temperature exceeds a threshold (second threshold Th2) during compressor 323 operation; and starts the compressor 323 when the first temperature exceeds a threshold (first threshold Th1) during compressor 323 operation. The threshold (first threshold Th1) during compressor 323 operation and the threshold (second threshold Th2) during compressor 323 operation are different from each other.

[0111] Therefore, it is less likely that there will be a delay in the operation of the compressor 323 until the temperature of the object space 4 is reflected, thus it has the advantage of easily suppressing the temperature change amplitude W1 of the object space 4.

[0112] Furthermore, the air conditioner 2 of the embodiment includes the air conditioning control system 100A described above, an indoor unit 31 installed in the target space 4, and an outdoor unit 32 installed outside the target space 4.

[0113] Therefore, it is less likely that there will be a delay in the operation of the compressor 323 until the temperature of the object space 4 is reflected, thus it has the advantage of easily suppressing the temperature change amplitude W1 of the object space 4.

[0114] Industrial availability This disclosure is applicable to air conditioning control methods, etc., used to control air conditioners.

[0115] Label Explanation 11 First Acquisition Section; 12 Second Acquisition Section; 14 Control Section; 2 Air Conditioner; 31 Indoor Unit; 32 Outdoor Unit; 323 Compressor; 4 Object Space; 100, 100A, 100B Air Conditioning Control System; ST1 First Acquisition Step; ST2 Control Step; ST3 Second Acquisition Step; Th1 First Threshold (Threshold); Th2 Second Threshold (Threshold); W1 Variation Range.

Claims

1. An air conditioning control method, include: The first obtaining step is to obtain a first temperature, which is the temperature of the target space where the indoor unit of the air conditioner is installed, and the air conditioner has the indoor unit and the outdoor unit. as well as The control step involves controlling the operation of the compressor in the outdoor unit based on the first temperature obtained in the first acquisition step. In the above control steps, when the first temperature exceeds the second threshold during compressor operation, the compressor is stopped; when the first temperature exceeds the first threshold during compressor stoppage, the compressor is restarted. When the air conditioner is operating in heating mode, the first threshold value during compressor shutdown is higher than the second threshold value during compressor operation.

2. An air conditioning control method, include: The first obtaining step is to obtain a first temperature, which is the temperature of the target space where the indoor unit of the air conditioner is installed, and the air conditioner has the indoor unit and the outdoor unit. as well as The control step involves controlling the operation of the compressor in the outdoor unit based on the first temperature obtained in the first acquisition step. In the above control steps, when the first temperature exceeds the second threshold during compressor operation, the compressor is stopped; when the first temperature exceeds the first threshold during compressor stoppage, the compressor is restarted. When the air conditioner is operating in cooling mode, the first threshold during compressor shutdown is lower than the second threshold during compressor operation.

3. The air conditioning control method as described in claim 1 or 2, The first threshold and the second threshold are determined based on the change in the first temperature per unit time.

4. The air conditioning control method as described in claim 1 or 2, The first threshold and the second threshold are determined based on the delay time from the moment the operation of the compressor is switched to the moment the sign of the change in the first temperature per unit time reverses.

5. The air conditioning control method as described in claim 1 or 2, It also includes a second step of obtaining the outside temperature, i.e., the second temperature. The first threshold and the second threshold are determined based on the second temperature obtained in the second acquisition step.

6. The air conditioning control method as described in claim 1 or 2, The aforementioned object space is the user's bedroom where they sleep. The above control steps are executed when the aforementioned users go to bed.

7. A program recording medium, The program recording medium contains a program that causes one or more processors to execute the air conditioning control method as described in claim 1 or 2.

8. An air conditioning control system, have: The first acquiring unit acquires a first temperature, which is the temperature of the target space where the indoor unit of an air conditioner is installed; the air conditioner includes the indoor unit and the outdoor unit; and The control unit controls the operation of the compressor in the outdoor unit based on the first temperature obtained by the first acquisition unit. The control unit stops the compressor when the first temperature exceeds the second threshold during compressor operation, and restarts the compressor when the first temperature exceeds the first threshold during compressor shutdown. When the air conditioner is operating in heating mode, the first threshold value during compressor shutdown is higher than the second threshold value during compressor operation.

9. An air conditioning control system, have: The first acquiring unit acquires a first temperature, which is the temperature of the target space where the indoor unit of an air conditioner is installed; the air conditioner includes the indoor unit and the outdoor unit; and The control unit controls the operation of the compressor in the outdoor unit based on the first temperature obtained by the first acquisition unit. The control unit stops the compressor when the first temperature exceeds the second threshold during compressor operation, and restarts the compressor when the first temperature exceeds the first threshold during compressor shutdown. When the air conditioner is operating in cooling mode, the first threshold during compressor shutdown is lower than the second threshold during compressor operation.

10. An air conditioner, have: The air conditioning control system as described in claim 8 or 9; The aforementioned indoor unit is installed in the aforementioned object space; and The aforementioned outdoor unit is located outside the aforementioned object space.

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