Method and device for controlling air conditioner, air conditioner, and storage medium

Abstract

The present application relates to the technical field of air conditioners and discloses a method for controlling an air conditioner, which is applied to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil. The method includes: while controlling the temperature of the first coil of the outdoor coil to remain unchanged, detecting the leakage of the refrigerant in the indoor unit and the leakage of the refrigerant in the outdoor unit, respectively, to obtain the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. The refrigerant leakage status of the air conditioner is determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. In this way, while determining the refrigerant leakage status of the air conditioner, it is possible to determine whether the refrigerant leakage occurs in the indoor unit or the outdoor unit, thereby locating the location of the refrigerant leak, so that maintenance personnel do not need to spend a lot of time locating the location of the refrigerant leak, thereby improving maintenance efficiency. The present application also discloses a device for controlling an air conditioner, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a method and device for controlling an air conditioner, an air conditioner, and a storage medium. Background Art

[0002] Air conditioners have become a necessity in people's daily lives. Air conditioners change the indoor temperature by circulating refrigerant for heat conduction. Therefore, if a refrigerant leak occurs during use, the air conditioner will be completely short of air, affecting its ability to regulate the indoor temperature and potentially even causing it to cease operation. Existing techniques typically use the temperature of the indoor coil to directly determine refrigerant leaks. However, since the refrigerant circulates between the indoor and outdoor units of the air conditioner, knowing only that the refrigerant is leaking does not reveal the location of the leak. Maintenance personnel must spend a considerable amount of time locating the leak when repairing the air conditioner, resulting in low maintenance efficiency.

[0003] During the implementation of the disclosed embodiments, it was discovered that the related art has at least the following problems: It only determines whether refrigerant is leaking, but does not locate the leak. This results in maintenance personnel spending a considerable amount of time locating the leak when repairing the air conditioner, resulting in low maintenance efficiency.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] Embodiments of the present disclosure provide a method and apparatus for controlling an air conditioner, an air conditioner, and a storage medium, so as to improve the maintenance efficiency of maintenance personnel in the event of a refrigerant leak.

[0007] In some embodiments, the method for controlling an air conditioner is applied to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the method includes: while controlling the first coil temperature of the outdoor coil to remain unchanged, respectively detecting the leakage of the indoor unit refrigerant and the leakage of the outdoor unit refrigerant to obtain the indoor unit refrigerant leakage and the outdoor unit refrigerant leakage; determining the refrigerant leakage of the air conditioner based on the indoor unit refrigerant leakage and the outdoor unit refrigerant leakage.

[0008] In some embodiments, the indoor unit includes an indoor coil; the air conditioner is provided with multiple shunts, each of which is used for refrigerant circulation; the refrigerant leakage of the indoor unit is detected by the following method: each of the shunts is controlled to open separately in turn, and the second coil temperature corresponding to each of the shunts is obtained respectively; the second coil temperature is the coil temperature of the indoor coil when each of the shunts is turned on separately; the refrigerant leakage of the indoor unit is obtained according to each of the second coil temperatures.

[0009] In some embodiments, obtaining the indoor unit refrigerant leakage status based on each second coil temperature includes: when the temperatures of each second coil are equal, determining the preset first refrigerant leakage status as the indoor unit refrigerant leakage status; and / or, when there is a second coil temperature that is not equal to other second coil temperatures, determining the preset second refrigerant leakage status as the indoor unit refrigerant leakage status.

[0010] In some embodiments, the air conditioner is equipped with a compressor; refrigerant leakage in the outdoor unit is detected by the following method: obtaining a current frequency of the compressor; determining multiple target compressor frequencies based on the current frequency; sequentially setting the compressor frequency to the target compressor frequency, and obtaining a third coil temperature corresponding to each target compressor frequency; the third coil temperature is the coil temperature of the indoor coil when the compressor frequency is the target compressor frequency; and determining refrigerant leakage in the outdoor unit based on each third coil temperature.

[0011] In some embodiments, the target compressor frequencies include a first target frequency, a second target frequency, and a third target frequency; and determining the multiple target compressor frequencies based on the current frequency includes: obtaining the current compressor frequency and a preset frequency deviation value; determining the current frequency as the first target frequency; and obtaining the second and third target frequencies based on the current frequency and the frequency deviation value.

[0012] In some embodiments, obtaining the refrigerant leakage status of the outdoor unit based on each of the third coil temperatures includes: obtaining a first difference between the sixth coil temperature and the fourth coil temperature; obtaining a second difference between the sixth coil temperature and the fifth coil temperature; the sixth coil temperature is the third coil temperature corresponding to the first target frequency; the fourth coil temperature is the third coil temperature corresponding to the second target frequency; the fifth coil temperature is the third coil temperature corresponding to the third target frequency; and determining the refrigerant leakage status of the outdoor unit based on the first difference and the second difference.

[0013] In some embodiments, determining the refrigerant leakage status of the air conditioner based on the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status includes: when the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are both a preset first refrigerant leakage status, determining the first refrigerant leakage status as the refrigerant leakage status of the air conditioner; and / or, when there is a preset second refrigerant leakage status in the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status, determining the second refrigerant leakage status as the refrigerant leakage status of the air conditioner.

[0014] In some embodiments, the device for controlling an air conditioner is applied to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the device includes: a detection module configured to detect refrigerant leakage in the indoor unit and the outdoor unit respectively while controlling the temperature of a first coil of the outdoor coil to remain unchanged, thereby obtaining the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit; and a determination module configured to determine the refrigerant leakage status of the air conditioner based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit.

[0015] In some embodiments, the air conditioner includes a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for controlling the air conditioner when running the program instructions.

[0016] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for controlling the air conditioner is executed.

[0017] The method and device for controlling an air conditioner, the air conditioner, and the storage medium provided by the embodiments of the present disclosure can achieve the following technical effects: by detecting the leakage of the indoor unit refrigerant and the leakage of the outdoor unit refrigerant respectively while controlling the temperature of the first coil of the outdoor coil to remain unchanged, the indoor unit refrigerant leakage and the outdoor unit refrigerant leakage are obtained, and then the refrigerant leakage of the air conditioner is determined based on the indoor unit refrigerant leakage and the outdoor unit refrigerant leakage. In this way, the refrigerant leakage of the air conditioner is determined based on the indoor unit refrigerant leakage and the outdoor unit refrigerant leakage. At the same time as determining the refrigerant leakage of the air conditioner, it is possible to determine whether the refrigerant leakage is in the indoor unit or the outdoor unit, thereby locating the location of the refrigerant leak, so that maintenance personnel do not need to spend a lot of time locating the location of the refrigerant leak, thereby improving maintenance efficiency.

[0018] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0020] Figure 1 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 2 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 5 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 6 Schematic diagram of an air conditioner provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0027] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0028] Unless otherwise stated, the term "plurality" means two or more.

[0029] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0030] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0031] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0032] The method for controlling an air conditioner provided by the embodiment of the present disclosure is applied to an air conditioner. While controlling the temperature of the first coil of the outdoor coil to remain unchanged, the air conditioner detects the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit respectively, and obtains the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit. The refrigerant leakage of the air conditioner is determined based on the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit. In this way, the refrigerant leakage of the air conditioner is determined based on the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit. At the same time as determining the refrigerant leakage of the air conditioner, it is possible to determine whether the refrigerant leakage occurs in the indoor unit or the outdoor unit, thereby locating the location of the refrigerant leak. This eliminates the need for maintenance personnel to spend a lot of time locating the location of the refrigerant leak, thereby improving maintenance efficiency.

[0033] The air conditioner is provided with a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is used to detect the indoor temperature. The second temperature sensor is used to detect the coil temperature of the indoor coil to obtain the second coil temperature and the third coil temperature. The third temperature sensor is used to detect the coil temperature of the outdoor coil to obtain the first coil temperature.

[0034] Combine Figure 1 As shown, an embodiment of the present disclosure provides a method for controlling an air conditioner, which is applied to the air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the method includes:

[0035] In step S101, the air conditioner detects the leakage of the indoor refrigerant and the outdoor refrigerant respectively while controlling the first coil temperature of the outdoor coil to obtain the leakage of the indoor refrigerant and the outdoor refrigerant.

[0036] In step S102, the air conditioner determines the refrigerant leakage status of the air conditioner according to the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit.

[0037] The method for controlling an air conditioner provided by the embodiment of the present disclosure detects the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit while maintaining the temperature of the first coil of the control outdoor coil. The leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit are then detected. The refrigerant leakage status of the air conditioner is then determined based on the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit. In this way, the refrigerant leakage status of the air conditioner is determined based on the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit. This allows the refrigerant leakage to be located accurately, eliminating the need for maintenance personnel to spend a significant amount of time locating the refrigerant leak, thereby improving maintenance efficiency.

[0038] Furthermore, the indoor unit includes an electronic expansion valve and a throttle valve corresponding to each branch flow. The electronic expansion valve and each throttle valve are both used to regulate the flow of refrigerant. The throttle valve is used to regulate the flow of refrigerant through each branch flow. The first coil temperature of the outdoor coil is controlled to remain constant by the following method: when refrigerant leakage in the indoor unit is detected, the first coil temperature of the outdoor coil is controlled to remain constant by adjusting the valve opening of the electromagnetic expansion valve and the valve opening of the throttle valve. When refrigerant leakage in the outdoor unit is detected, the first coil temperature of the outdoor coil is controlled to remain constant by controlling the valve opening of the throttle valve.

[0039] Optionally, the indoor unit includes an indoor coil; the air conditioner is provided with multiple branch flows, each of which is used for refrigerant circulation; and refrigerant leakage in the indoor unit is detected by the following method: each branch flow is sequentially controlled to be individually opened, and a second coil temperature corresponding to each branch flow is obtained. The second coil temperature is the coil temperature of the indoor coil when each branch flow is individually opened. Refrigerant leakage status of the indoor unit is obtained based on each second coil temperature. In this way, by obtaining refrigerant leakage status of the indoor unit based on the coil temperature of the indoor coil when each branch flow is individually opened, it is possible to accurately determine whether a refrigerant leak has occurred in the indoor unit.

[0040] Furthermore, sequentially controlling each branch flow to be opened individually includes: obtaining the indoor temperature and, when the indoor temperature is equal to a preset target ambient temperature, sequentially controlling each branch flow to be opened individually in a preset order.

[0041] Optionally, determining the indoor unit refrigerant leakage status based on the second coil temperatures includes: if the second coil temperatures are equal, determining the preset first refrigerant leakage status as the indoor unit refrigerant leakage status. And / or, if the second coil temperature is unequal to the other second coil temperatures, determining the preset second refrigerant leakage status as the indoor unit refrigerant leakage status. In this manner, the indoor unit refrigerant leakage status is determined based on the equality between the second coil temperatures, thereby facilitating determining the refrigerant leakage status of the air conditioner based on the indoor unit refrigerant leakage status.

[0042] Furthermore, the first refrigerant leakage state is no leakage, and the second refrigerant leakage state is leakage.

[0043] Furthermore, if the second coil temperature is unequal to the other second coil temperatures, the system further includes determining the split flow corresponding to the second coil temperature that is unequal to the other second coil temperatures as a split flow with refrigerant leakage. This allows accurate location of the leaking split flow in the event of a refrigerant leak in the indoor unit, enabling maintenance personnel to more effectively target that split flow, improving maintenance efficiency.

[0044] In some embodiments, an air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; and the indoor unit includes an electronic expansion valve, a four-way valve, and throttle valves corresponding to each diversion. The air conditioner has four diversions: a first diversion, a second diversion, a third diversion, and a fourth diversion. The risk of the four diversions is the four valve positions of the four-way valve. The throttle valves corresponding to the second, third, and fourth diversions are all controlled to be closed, thereby closing the second, third, and fourth diversions. The throttle valve corresponding to the first diversion is controlled to be open, thereby opening the first diversion alone. The first coil temperature of the outdoor coil is maintained constant by controlling the valve openings of the electronic expansion valve and the throttle valve corresponding to the first diversion. A second temperature sensor is then used to detect the coil temperature of the indoor coil to obtain the second coil temperature t1 corresponding to the first diversion. The throttle valves corresponding to the first, third, and fourth branch flows are all closed, thereby closing the first, third, and fourth branches. The throttle valve corresponding to the second branch flow is opened, thereby opening the second branch flow alone. The first coil temperature of the outdoor coil is maintained constant by controlling the valve opening of the electronic expansion valve and the valve opening of the throttle valve corresponding to the second branch flow. A second temperature sensor is then used to detect the coil temperature of the indoor coil to obtain the second coil temperature t2 corresponding to the second branch flow. The throttle valves corresponding to the first, second, and fourth branch flows are all closed, thereby closing the first, second, and fourth branches. The throttle valve corresponding to the third branch flow is opened, thereby opening the third branch flow alone. The first coil temperature of the outdoor coil is maintained constant by controlling the valve opening of the electronic expansion valve and the valve opening of the throttle valve corresponding to the third branch flow. The second temperature sensor is then used to detect the coil temperature of the indoor coil and obtain the second coil temperature t3 corresponding to the third branch. The throttle valves corresponding to the first, second, and third branches are closed, thereby closing the first, second, and third branches. The throttle valve corresponding to the fourth branch is opened, thereby opening the fourth branch alone. The first coil temperature of the outdoor coil is maintained constant by controlling the valve openings of the electronic expansion valve and the throttle valve corresponding to the fourth branch. The second temperature sensor is then used to detect the coil temperature of the indoor coil and obtain the second coil temperature t4 corresponding to the fourth branch. If t1 = t2 = t3 = t4, the heat exchange capacity of the refrigerant in each branch is determined to be equal. Therefore, there is no refrigerant leakage in any of the branches. If t1 = t2 = t3, and t4 ≠ t1, the branch corresponding to t4 is determined to be the fourth branch, indicating that the refrigerant is leaking.

[0045] Combine Figure 2As shown, an embodiment of the present disclosure provides a method for controlling an air conditioner, which is applied to the air conditioner. The air conditioner includes an indoor unit and an outdoor unit. The outdoor unit includes an outdoor coil. The indoor unit includes an indoor coil. The air conditioner is provided with multiple flow branches, each of which is used for refrigerant circulation. The method includes:

[0046] In step S201, while maintaining the first coil temperature of the outdoor coil, the air conditioner sequentially controls each branch flow to be turned on individually, and obtains the second coil temperature corresponding to each branch flow. The second coil temperature is the coil temperature of the indoor coil when each branch flow is turned on individually.

[0047] In step S202, the air conditioner determines whether the temperatures of all second coils are equal. If so, that is, the temperatures of all second coils are equal, then step S203 is executed. If not, that is, there is a second coil temperature that is not equal to the temperatures of other second coils, then step S204 is executed.

[0048] In step S203, the air conditioner determines the preset first refrigerant leakage state as a refrigerant leakage state of the indoor unit.

[0049] In step S204, the air conditioner determines the preset second refrigerant leakage state as the indoor unit refrigerant leakage state.

[0050] The method for controlling an air conditioner provided by the disclosed embodiments obtains the second coil temperature of each bypass coil when it is individually activated, while maintaining the first coil temperature of the outdoor coil. Refrigerant leakage in the indoor unit is determined based on the equality between the second coil temperatures. This method facilitates detection of refrigerant leakage in the indoor unit. While facilitating determination of refrigerant leakage in the air conditioner based on the indoor unit refrigerant leakage status, it also allows the refrigerant leak to be located within the indoor unit. This reduces the time required for maintenance personnel to locate the refrigerant leak, improving maintenance efficiency.

[0051] Optionally, the air conditioner is equipped with a compressor. Refrigerant leakage in the outdoor unit is detected by the following method: obtaining the current frequency of the compressor. Determining multiple target compressor frequencies based on the current frequency. Sequentially setting the compressor frequencies to target compressor frequencies, and obtaining the third coil temperature corresponding to each target compressor frequency. The third coil temperature is the coil temperature of the indoor coil when the compressor frequency is the target compressor frequency. Refrigerant leakage in the outdoor unit is detected based on each third coil temperature. In this way, by obtaining the third coil temperature of the indoor coil when the compressor is at different target compressor frequencies, and then obtaining refrigerant leakage in the outdoor unit based on each third coil temperature, refrigerant leakage in the outdoor unit is detected.

[0052] Furthermore, controlling each branch to be in an open state includes: controlling the throttle valve corresponding to each branch to be in an open state.

[0053] Furthermore, before obtaining the current frequency of the compressor, the method further includes: controlling each branch flow to be in an open state, and controlling the electromagnetic expansion valve to be in a power-off state.

[0054] In some embodiments, after controlling each shunt to be in an open state and controlling the electromagnetic expansion valve to be in a power-off state, the opening and closing angle of the electromagnetic expansion valve can remain unchanged. At this time, the first coil temperature of the outdoor coil changes with the frequency of the compressor. By controlling the valve opening of the throttle valve of each shunt to control the refrigerant flow, the first coil temperature of the outdoor coil can be controlled to remain unchanged. When the frequency of the compressor increases, the valve opening of the throttle valve of each shunt is reduced. When the frequency of the compressor decreases, the valve opening of the throttle valve of each shunt is increased. In this way, the temperature of the first coil can be kept constant.

[0055] Optionally, the target compressor frequency includes a first target frequency, a second target frequency, and a third target frequency. Determining the multiple target compressor frequencies based on the current frequency includes: obtaining the current compressor frequency and a preset frequency deviation value. Determining the current frequency as the first target frequency. Determining the second target frequency and the third target frequency based on the current frequency and the frequency deviation value. In this manner, the first target frequency, the second target frequency, and the third target frequency are obtained based on the current frequency and the preset frequency deviation value. This facilitates obtaining a third coil temperature of the indoor coil when the compressor is at different target compressor frequencies.

[0056] Furthermore, obtaining the second target frequency and the third target frequency according to the current frequency and the frequency deviation value includes: determining the sum of the current frequency and the frequency deviation value as the second target frequency, and determining the difference between the current frequency and the frequency deviation value as the second target frequency.

[0057] Optionally, obtaining the outdoor unit refrigerant leakage status based on each third coil temperature includes: obtaining a first difference between the sixth coil temperature and the fourth coil temperature. Obtaining a second difference between the sixth coil temperature and the fifth coil temperature. The sixth coil temperature is the third coil temperature corresponding to the first target frequency; the fourth coil temperature is the third coil temperature corresponding to the second target frequency. The fifth coil temperature is the third coil temperature corresponding to the third target frequency. Determining the outdoor unit refrigerant leakage status based on the first difference and the second difference. In this way, the outdoor unit refrigerant leakage status can be determined based on the first difference between the sixth coil temperature and the fourth coil temperature and the second difference between the sixth coil temperature and the fifth coil temperature. This facilitates determining the refrigerant leakage status of the air conditioner based on the outdoor unit refrigerant leakage status.

[0058] Furthermore, determining a second refrigerant leakage status of the outdoor unit based on the first difference and the second difference includes: determining the preset first refrigerant leakage status as a refrigerant leakage status of the outdoor unit when the absolute value of the first difference is greater than the absolute value of the second difference; and / or determining the preset second refrigerant leakage status as a refrigerant leakage status of the outdoor unit when the absolute value of the first difference is less than or equal to the absolute value of the second difference.

[0059] In some embodiments, the second target frequency is greater than the first target frequency. The first target frequency is greater than the third target frequency. When the frequency of the compressor changes from the first target frequency to the second target frequency, the compressor is in a frequency-increasing state. The higher the pressure provided by the compressor, the higher the pressure output by the compressor to the indoor unit. The frequency of the compressor has a large impact on the coil temperature of the indoor coil. When the frequency of the compressor changes from the second target frequency to the third target frequency, the compressor is in a frequency-increasing state. The lower the pressure provided by the compressor, the lower the pressure output by the compressor to the indoor unit. Therefore, the frequency of the compressor has a small impact on the coil temperature of the indoor coil. Therefore, if the absolute value of the first difference is greater than the absolute value of the second difference, there is no refrigerant leakage in the outdoor unit. If the absolute value of the first difference is less than or equal to the absolute value of the second difference, there is refrigerant leakage in the outdoor unit.

[0060] Combine Figure 3 As shown, an embodiment of the present disclosure provides a method for controlling an air conditioner, which is applied to the air conditioner. The air conditioner includes an indoor unit and an outdoor unit. The outdoor unit includes an outdoor coil. The indoor unit includes an electromagnetic expansion valve and an indoor coil. The air conditioner is provided with multiple flow branches, each of which is used for refrigerant circulation. The air conditioner is equipped with a compressor. The method includes:

[0061] In step S301, the air conditioner controls all branches to be in an open state.

[0062] In step S302, the air conditioner controls the electromagnetic expansion valve to be in a power-off state.

[0063] In step S303, the air conditioner obtains the current frequency of the compressor while controlling the first coil temperature of the outdoor coil to remain unchanged, and determines multiple target compressor frequencies based on the current frequency. The compressor frequencies are sequentially set to the target compressor frequencies, and the third coil temperatures corresponding to the target compressor frequencies are respectively obtained. The third coil temperature is the coil temperature of the indoor coil when the compressor frequency is the target compressor frequency. The target compressor frequencies include a first target frequency, a second target frequency, and a third target frequency. The first target frequency is the current frequency of the compressor. The second target frequency is the sum of the current frequency of the compressor and a preset frequency deviation value. The third target frequency is the difference between the current frequency of the compressor and a preset frequency deviation value.

[0064] In step S304, the air conditioner obtains a first difference between a sixth coil temperature and a fourth coil temperature, wherein the sixth coil temperature is the third coil temperature corresponding to the first target frequency, and the fourth coil temperature is the third coil temperature corresponding to the second target frequency.

[0065] In step S305, the air conditioner obtains a second difference between the sixth coil temperature and the fifth coil temperature, wherein the fifth coil temperature is the third coil temperature corresponding to the third target frequency.

[0066] In step S306, the air conditioner determines whether the absolute value of the first difference is greater than the absolute value of the second difference. If so, the process proceeds to step S307; if not, the process proceeds to step S308.

[0067] In step S307, the air conditioner determines the preset first refrigerant leakage state as a refrigerant leakage state of the outdoor unit.

[0068] In step S308, the air conditioner determines the preset second refrigerant leakage state as the outdoor unit refrigerant leakage state.

[0069] The method for controlling an air conditioner provided by the embodiments of the present disclosure controls each flow divider to be in the open state and the electromagnetic expansion valve to be in the de-energized state. Then, while maintaining the first coil temperature of the outdoor coil constant, the first, second, and third target frequencies are determined. The sixth coil temperature of the outdoor coil is obtained when the compressor is at the first target frequency, the fourth coil temperature is obtained when the compressor is at the second target frequency, and the fifth coil temperature is obtained when the compressor is at the third target frequency. Refrigerant leakage in the indoor unit is then determined based on the absolute value of the second difference between the sixth and fifth coil temperatures and the magnitude relationship between the second difference between the sixth and fifth coil temperatures. This method detects refrigerant leakage in the outdoor unit. While facilitating determination of refrigerant leakage in the air conditioner based on the outdoor unit refrigerant leakage condition, the refrigerant leak can be located in the outdoor unit. This reduces the time required for maintenance personnel to locate the refrigerant leak, improving maintenance efficiency.

[0070] Optionally, determining the refrigerant leakage status of the air conditioner based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit includes: when the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit are both a preset first refrigerant leakage status, determining the first refrigerant leakage status as the refrigerant leakage status of the air conditioner. And / or, when the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit both have a preset second refrigerant leakage status, determining the second refrigerant leakage status as the refrigerant leakage status of the air conditioner. In this way, the refrigerant leakage status of the air conditioner can be determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit.

[0071] Furthermore, after the air conditioner determines a refrigerant leakage status based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit, the method further includes: if the refrigerant leakage status of the air conditioner is a preset second refrigerant leakage state, controlling the air conditioner to enter an alarm shutdown state. A preset alarm message is sent to a user terminal of a preset person, where the preset person is a preset user or a preset maintenance person. In this way, after a refrigerant leak occurs, the air conditioner can wait for maintenance by the user or maintenance person.

[0072] Combine Figure 4 As shown, an embodiment of the present disclosure provides a method for controlling an air conditioner, which is applied to the air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the method includes:

[0073] In step S401, the air conditioner detects the leakage of the indoor refrigerant and the outdoor refrigerant respectively while controlling the first coil temperature of the outdoor coil to obtain the leakage of the indoor refrigerant and the outdoor refrigerant.

[0074] In step S402, the air conditioner determines whether both the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are in a preset first refrigerant leakage state. If so, step S403 is executed. If not, that is, if the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status both have a preset second refrigerant leakage state, step S404 is executed. The first refrigerant leakage state is no leakage. The second refrigerant leakage state is leakage.

[0075] In step S403, the air conditioner determines the first refrigerant leakage state as a refrigerant leakage condition of the air conditioner.

[0076] In step S404, the air conditioner determines the second refrigerant leakage state as a refrigerant leakage condition of the air conditioner.

[0077] The method for controlling an air conditioner provided by the disclosed embodiments detects refrigerant leakage in the indoor unit and the outdoor unit, respectively, while maintaining the temperature of the first coil of the control outdoor coil. The indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are then determined. If both the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are in a preset first refrigerant leakage state, the air conditioner is determined to be in a refrigerant leakage state if the first refrigerant leakage state is no leakage. If both the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are in a preset second refrigerant leakage state, the air conditioner is determined to be in a refrigerant leakage state if the second refrigerant leakage state is present. In this way, by determining the refrigerant leakage status of the air conditioner based on the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status, it is possible to determine whether the air conditioner is leaking and whether the refrigerant is leaking in the indoor unit or the outdoor unit, thereby locating the refrigerant leak. This reduces the time it takes for maintenance personnel to locate the refrigerant leak, thereby improving maintenance efficiency.

[0078] Combine Figure 5 As shown, an embodiment of the present disclosure provides a device 1 for controlling an air conditioner, which is applied to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; and the device includes: a detection module 2 and a determination module 3. The detection module 2 is configured to detect the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit, respectively, while controlling the temperature of the first coil of the outdoor coil to remain unchanged, and obtain the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. The determination module 3 is configured to determine the refrigerant leakage status of the air conditioner based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit.

[0079] The device for controlling an air conditioner provided by the embodiment of the present disclosure detects the leakage of the refrigerant in the indoor unit and the refrigerant in the outdoor unit respectively while maintaining the temperature of the first coil of the control outdoor coil, thereby obtaining the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. The refrigerant leakage status of the air conditioner is then determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. In this way, the refrigerant leakage status of the air conditioner is determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. While determining the refrigerant leakage status of the air conditioner, it is possible to determine whether the refrigerant leakage is occurring in the indoor unit or the outdoor unit, thereby locating the refrigerant leak. This reduces the time required for maintenance personnel to locate the refrigerant leak, thereby improving maintenance efficiency.

[0080] Optionally, the indoor unit includes an indoor coil; the air conditioner is provided with multiple branch flows, each branch flow being used for refrigerant circulation; and the detection module is configured to detect refrigerant leakage in the indoor unit by sequentially controlling each branch flow to be individually turned on and obtaining a second coil temperature corresponding to each branch flow; the second coil temperature being the coil temperature of the indoor coil when each branch flow is individually turned on. Refrigerant leakage in the indoor unit is obtained based on each second coil temperature.

[0081] Optionally, the detection module is configured to obtain the refrigerant leakage status of the indoor unit according to the temperature of each second coil by the following method, including: when the temperatures of each second coil are equal, determining the preset first refrigerant leakage status as the refrigerant leakage status of the indoor unit; and / or, when there is a second coil temperature that is not equal to other second coil temperatures, determining the preset second refrigerant leakage status as the refrigerant leakage status of the indoor unit.

[0082] Optionally, the air conditioner is equipped with a compressor; the detection module is configured to detect refrigerant leakage in the outdoor unit by: obtaining a current frequency of the compressor; determining multiple target compressor frequencies based on the current frequency; sequentially setting the compressor frequency to the target compressor frequency, and obtaining a third coil temperature corresponding to each target compressor frequency; the third coil temperature being the coil temperature of the indoor coil when the compressor frequency is the target compressor frequency; and obtaining refrigerant leakage status of the outdoor unit based on each third coil temperature.

[0083] Optionally, the target compressor frequency includes a first target frequency, a second target frequency, and a third target frequency. The detection module is configured to determine the multiple target compressor frequencies based on the current frequency by the following method, including: obtaining the current frequency of the compressor and a preset frequency deviation value; determining the current frequency as the first target frequency; and obtaining the second target frequency and the third target frequency based on the current frequency and the frequency deviation value.

[0084] Optionally, the detection module is configured to obtain the refrigerant leakage status of the outdoor unit based on each of the third coil temperatures using the following method, including: obtaining a first difference between the sixth coil temperature and the fourth coil temperature; obtaining a second difference between the sixth coil temperature and the fifth coil temperature; the sixth coil temperature being the third coil temperature corresponding to the first target frequency; the fourth coil temperature being the third coil temperature corresponding to the second target frequency; and the fifth coil temperature being the third coil temperature corresponding to the third target frequency. The refrigerant leakage status of the outdoor unit is determined based on the first and second differences.

[0085] Optionally, the determination module is configured to determine the refrigerant leakage condition of the air conditioner based on the indoor unit refrigerant leakage condition and the outdoor unit refrigerant leakage condition by the following method, including: when the indoor unit refrigerant leakage condition and the outdoor unit refrigerant leakage condition are both a preset first refrigerant leakage state, determining the first refrigerant leakage state as the refrigerant leakage condition of the air conditioner; and / or, when there is a preset second refrigerant leakage state in the indoor unit refrigerant leakage condition and the outdoor unit refrigerant leakage condition, determining the second refrigerant leakage state as the refrigerant leakage condition of the air conditioner.

[0086] Combine Figure 6 As shown, an embodiment of the present disclosure provides an air conditioner 4, including a processor 5 and a memory 6. Optionally, the device may further include a communication interface 7 and a bus 8. The processor 5, the communication interface 7, and the memory 6 may communicate with each other via the bus 8. The communication interface 7 may be used for information transmission. The processor 5 may call the logic instructions in the memory 6 to execute the method for controlling the air conditioner of the above embodiment.

[0087] In addition, the logic instructions in the memory 6 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0088] Memory 6, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 5 executes the program instructions / modules stored in memory 6 to perform functional applications and data processing, thereby implementing the method for controlling the air conditioner in the above-mentioned embodiments.

[0089] The memory 6 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 6 may include a high-speed random access memory and a non-volatile memory.

[0090] The air conditioner provided by the embodiment of the present disclosure detects the refrigerant leakage of the indoor unit and the refrigerant leakage of the outdoor unit respectively while controlling the temperature of the first coil of the outdoor coil to obtain the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. The refrigerant leakage status of the air conditioner is then determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. In this way, the refrigerant leakage status of the air conditioner is determined based on the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit. While determining the refrigerant leakage status of the air conditioner, it is possible to determine whether the refrigerant leakage is occurring in the indoor unit or the outdoor unit, thereby locating the refrigerant leak. This reduces the time required for maintenance personnel to locate the refrigerant leak, thereby improving maintenance efficiency.

[0091] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0092] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0093] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program code, or a transient storage medium.

[0094] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0095] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0096] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. In addition, the functional units in the embodiments of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0097] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an air conditioner, characterized in that: Applicable to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the method includes: Under the condition that the temperature of the first coil of the outdoor coil is controlled to be constant, respectively detecting the leakage of the refrigerant of the indoor unit and the leakage of the refrigerant of the outdoor unit to obtain the leakage of the refrigerant of the indoor unit and the leakage of the refrigerant of the outdoor unit; determining a refrigerant leakage condition of the air conditioner according to the refrigerant leakage condition of the indoor unit and the refrigerant leakage condition of the outdoor unit; The indoor unit includes an indoor coil; the air conditioner is provided with multiple branch flows, each branch flow being used for circulating refrigerant; detecting refrigerant leakage in the indoor unit by sequentially controlling each branch flow to be individually opened and obtaining a second coil temperature corresponding to each branch flow; the second coil temperature being the coil temperature of the indoor coil when each branch flow is individually opened; and obtaining refrigerant leakage in the indoor unit based on each second coil temperature; Obtaining the indoor unit refrigerant leakage status based on the temperatures of the second coils, including: determining the preset first refrigerant leakage status as the indoor unit refrigerant leakage status when the temperatures of the second coils are equal; and / or determining the preset second refrigerant leakage status as the indoor unit refrigerant leakage status when the temperature of one second coil is unequal to the temperature of another second coil; The air conditioner is equipped with a compressor; detecting refrigerant leakage of the outdoor unit by the following method: obtaining a current frequency of the compressor; determining multiple target compressor frequencies based on the current frequency; sequentially setting the compressor frequency to the target compressor frequency, and respectively obtaining a third coil temperature corresponding to each target compressor frequency; the third coil temperature being the coil temperature of the indoor coil when the compressor frequency is the target compressor frequency; and obtaining refrigerant leakage of the outdoor unit based on each third coil temperature; The target compressor frequency includes a first target frequency, a second target frequency, and a third target frequency; determining the multiple target compressor frequencies according to the current frequency includes: obtaining the current frequency of the compressor and a preset frequency deviation value; determining the current frequency as the first target frequency; and obtaining the second target frequency and the third target frequency according to the current frequency and the frequency deviation value; Obtaining the refrigerant leakage status of the outdoor unit according to each of the third coil temperatures, including: obtaining a first difference between the sixth coil temperature and the fourth coil temperature; obtaining a second difference between the sixth coil temperature and the fifth coil temperature; the sixth coil temperature is the third coil temperature corresponding to the first target frequency; the fourth coil temperature is the third coil temperature corresponding to the second target frequency; the fifth coil temperature is the third coil temperature corresponding to the third target frequency; determining the refrigerant leakage status of the outdoor unit according to the first difference and the second difference.

2. The method according to claim 1, characterized in that Determining the refrigerant leakage status of the air conditioner according to the refrigerant leakage status of the indoor unit and the refrigerant leakage status of the outdoor unit includes: When both the indoor unit refrigerant leakage status and the outdoor unit refrigerant leakage status are in a preset first refrigerant leakage status, determining the first refrigerant leakage status as the refrigerant leakage status of the air conditioner; and / or, In a case where a preset second refrigerant leakage state exists between the indoor unit refrigerant leakage state and the outdoor unit refrigerant leakage state, the second refrigerant leakage state is determined as the refrigerant leakage state of the air conditioner.

3. A device for controlling an air conditioner, characterized in that: Applicable to an air conditioner; the air conditioner includes an indoor unit and an outdoor unit; the outdoor unit includes an outdoor coil; the device includes: a detection module configured to detect leakage of the indoor unit refrigerant and leakage of the outdoor unit refrigerant respectively while controlling the temperature of the first coil of the outdoor coil to remain unchanged, thereby obtaining leakage information of the indoor unit refrigerant and leakage information of the outdoor unit refrigerant; a determination module configured to determine a refrigerant leakage condition of the air conditioner according to the refrigerant leakage condition of the indoor unit and the refrigerant leakage condition of the outdoor unit; The indoor unit includes an indoor coil; the air conditioner is provided with multiple branch flows, each branch flow being used for circulating refrigerant; the detection module is configured to detect refrigerant leakage in the indoor unit by sequentially controlling each branch flow to be individually turned on and obtaining a second coil temperature corresponding to each branch flow; the second coil temperature being the coil temperature of the indoor coil when each branch flow is individually turned on; and obtaining refrigerant leakage in the indoor unit based on each second coil temperature; The detection module is configured to obtain the indoor unit refrigerant leakage status based on the temperatures of the second coils by: determining the preset first refrigerant leakage status as the indoor unit refrigerant leakage status when the temperatures of the second coils are equal; and / or determining the preset second refrigerant leakage status as the indoor unit refrigerant leakage status when the temperature of one second coil is not equal to the temperature of another second coil; The air conditioner is equipped with a compressor; the detection module is configured to detect refrigerant leakage of the outdoor unit by the following method: obtaining a current frequency of the compressor; determining multiple target compressor frequencies based on the current frequency; sequentially setting the frequency of the compressor to the target compressor frequency, and respectively obtaining a third coil temperature corresponding to each target compressor frequency; the third coil temperature being the coil temperature of the indoor coil when the frequency of the compressor is the target compressor frequency; and obtaining refrigerant leakage of the outdoor unit based on each third coil temperature; The target compressor frequency includes a first target frequency, a second target frequency, and a third target frequency; the detection module is configured to determine the multiple target compressor frequencies according to the current frequency by the following method: obtaining the current frequency of the compressor and a preset frequency deviation value; determining the current frequency as the first target frequency; and obtaining the second target frequency and the third target frequency according to the current frequency and the frequency deviation value; The detection module is configured to obtain the refrigerant leakage status of the outdoor unit according to each of the third coil temperatures by the following method: obtaining a first difference between the sixth coil temperature and the fourth coil temperature; obtaining a second difference between the sixth coil temperature and the fifth coil temperature; the sixth coil temperature is the third coil temperature corresponding to the first target frequency; the fourth coil temperature is the third coil temperature corresponding to the second target frequency; the fifth coil temperature is the third coil temperature corresponding to the third target frequency; and determining the refrigerant leakage status of the outdoor unit according to the first difference and the second difference.

4. An air conditioner comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling an air conditioner according to any one of claims 1 to 2 when running the program instructions.

5. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 1 to 2 is executed.

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