Air conditioner, control method and device thereof and storage medium

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner and a storage medium. The method comprises the steps that in the operation process of an indoor fan of a target air conditioner, the air inlet temperature and the first refrigerant concentration of an indoor air inlet of the target air conditioner and the air outlet temperature and the second refrigerant concentration of an indoor air outlet of the target air conditioner are obtained; and according to the air inlet temperature, the first refrigerant concentration, the air outlet temperature and the second refrigerant concentration, a refrigerant leakage source is determined, and the refrigerant leakage source is the target air conditioner or other air conditioners located in the same space as the target air conditioner. Therefore, the specific air conditioner with the refrigerant leakage can be accurately determined, only the air conditioner with the refrigerant leakage can be controlled to stop working, the air conditioner without the refrigerant leakage can continue working, and the air conditioners are used to the maximum extent.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to an air conditioner and a control method, device and storage medium thereof. Background Art

[0002] When there are multiple air conditioners in the same space, a concentration sensor is usually set in the space to detect the refrigerant leakage in the space and control the multiple air conditioners to stop running when the refrigerant leakage occurs. However, this method will affect the normal use of the air conditioner. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the purpose of the present invention is to provide an air conditioner and a control method, device and storage medium thereof, which can accurately determine the specific air conditioner with refrigerant leakage, so that only the air conditioner with refrigerant leakage can be controlled to stop working, while the air conditioner without refrigerant leakage can continue to work, thereby maximizing the use of the air conditioner.

[0004] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present invention proposes a method for controlling an air conditioner, the method comprising: during the operation of the indoor fan of the target air conditioner, obtaining the inlet air temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, and the outlet air temperature and the second refrigerant concentration at the indoor air outlet; determining the refrigerant leakage source according to the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

[0005] According to one embodiment of the present invention, a refrigerant leakage source is determined based on the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, including: when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are not equal, or the inlet air temperature and the outlet air temperature meet the second preset condition, determining that the refrigerant leakage source is a target air conditioner; when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal and not zero, determining that the refrigerant leakage source is other air conditioners; when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal and zero, determining that there is no refrigerant leakage source.

[0006] According to one implementation of the present invention, after determining the refrigerant leakage source, the method further includes: when the refrigerant leakage source is a target air conditioner, determining the refrigerant leakage situation of the target air conditioner according to the first refrigerant concentration and the second refrigerant concentration; when the refrigerant leakage source is other air conditioners, determining the refrigerant leakage situation of the other air conditioners according to the second refrigerant concentration.

[0007] According to one embodiment of the present invention, the refrigerant leakage situation of the target air conditioner is determined according to the first refrigerant concentration and the second refrigerant concentration, including: when the inlet air temperature and the outlet air temperature meet the first preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the first preset concentration and less than the second preset concentration, then the refrigerant leakage situation of the target air conditioner is determined to be a slight refrigerant leakage; when the inlet air temperature and the outlet air temperature meet the second preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the second preset concentration, then the refrigerant leakage situation of the target air conditioner is determined to be a severe refrigerant leakage.

[0008] According to one embodiment of the present invention, the refrigerant leakage situation of other air conditioners is determined based on the second refrigerant concentration, including: if the second refrigerant concentration is greater than zero and less than the first preset concentration, the leakage situation of other air conditioners is determined to be a slight refrigerant leakage; if the second refrigerant concentration is greater than or equal to the first preset concentration, the refrigerant leakage situation of other air conditioners is determined to be a severe refrigerant leakage.

[0009] According to one embodiment of the present invention, the method also includes: obtaining the operating mode of the target air conditioner; when the operating mode is a cooling mode, the first preset condition is that the outlet air temperature is less than the inlet air temperature, and the second preset condition is that the outlet air temperature is greater than or equal to the inlet air temperature; when the operating mode is a heating mode, the first preset condition is that the inlet air temperature is less than the outlet air temperature, and the second preset condition is that the inlet air temperature is greater than or equal to the outlet air temperature.

[0010] According to one embodiment of the present invention, after determining the refrigerant leakage situation of the target air conditioner, the method also includes: when the refrigerant leakage situation of the target air conditioner is a mild refrigerant leakage, controlling the outdoor unit of the target air conditioner to stop, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outdoors; when the refrigerant leakage situation of the target air conditioner is a severe refrigerant leakage, controlling the indoor fan and the outdoor unit to stop, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outdoors.

[0011] According to one embodiment of the present invention, after determining the refrigerant leakage situation of other air conditioners, the method also includes: when the refrigerant leakage situation of other air conditioners is a mild refrigerant leakage, controlling the target air conditioner to issue a first reminder message; when the refrigerant leakage situation of other air conditioners is a severe refrigerant leakage, controlling the target air conditioner to issue a first reminder message, and controlling the exhaust system of the target air conditioner to discharge the leaked refrigerant to the outside.

[0012] According to one embodiment of the present invention, the exhaust system includes an exhaust channel and an exhaust fan, and the exhaust system of the target air conditioner is controlled to operate to discharge the leaked refrigerant to the outdoors, including: determining the target speed of the exhaust fan according to the second refrigerant concentration; controlling the exhaust channel to be in an open state, and controlling the exhaust fan to operate at the target speed.

[0013] According to one embodiment of the present invention, the target speed of the exhaust fan is determined according to the second refrigerant concentration, including: when the second refrigerant concentration is less than the second preset concentration, obtaining the ratio of the second refrigerant concentration to the second preset concentration and the product of the ratio and the maximum allowable speed of the exhaust fan to obtain the target speed; when the second refrigerant concentration is greater than or equal to the second preset concentration, using the maximum allowable speed as the target speed.

[0014] To achieve the above-mentioned purpose, a second aspect of the present invention provides a computer-readable storage medium having a program stored thereon, which implements the aforementioned use case determination method when executed by a processor.

[0015] To achieve the above objectives, a third aspect of the present invention provides an air conditioner, comprising: a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, the aforementioned air conditioner control method is implemented.

[0016] To achieve the above-mentioned purpose, an embodiment of the fourth aspect of the present invention proposes a control device for an air conditioner, the device comprising: an acquisition module, used to obtain the inlet air temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, and the outlet air temperature and the second refrigerant concentration at the indoor air outlet during the operation of the indoor fan of the target air conditioner; a control module, used to determine the refrigerant leakage source based on the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

[0017] According to the air conditioner and its control method, device and storage medium of the embodiment of the present invention, during the operation of the indoor fan of the target air conditioner, the air inlet temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, as well as the air outlet temperature and the second refrigerant concentration at the indoor air outlet are obtained; based on the air inlet temperature, the first refrigerant concentration, the air outlet temperature and the second refrigerant concentration, the refrigerant leakage source is determined, such as the target air conditioner or other air conditioners in the same space as the target air conditioner. In this way, the specific air conditioner with refrigerant leakage can be accurately determined, so that only the air conditioner with refrigerant leakage can be controlled to stop working, while the air conditioner without refrigerant leakage can continue to work, thereby maximizing the use of the air conditioner.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 4 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention.

[0020] Figure 2 FIG. 1 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0021] Figure 3 FIG. 4 is a flow chart of a method for controlling an air conditioner according to another embodiment of the present invention.

[0022] Figure 4 FIG. 1 is a schematic structural diagram of a control device for an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The air conditioner and its control method, device and storage medium according to the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In an embodiment of the present invention, at least two air conditioners are arranged in the same space, each air conditioner may include an indoor unit and an outdoor unit, the indoor unit may include an indoor fan and an indoor heat exchanger, etc., the outdoor unit may include a compressor, an outdoor fan and an outdoor heat exchanger, etc., and the specific structure is not limited here.

[0026] During the operation of at least two air conditioners, in the related art, a concentration sensor is usually set in the space to detect the refrigerant leakage in the space and control multiple air conditioners to stop running when refrigerant leakage occurs. However, this will affect the normal use of the air conditioners.

[0027] Based on this, in an embodiment of the invention, the source of refrigerant leakage can be determined for one or more air conditioners in a space by detecting the air inlet temperature and refrigerant concentration at the indoor air inlet and indoor air outlet during the operation of the indoor fan of the air conditioner, that is, to determine whether the refrigerant leakage occurs in the air conditioner or in other air conditioners in the same space, and then control the air conditioner with refrigerant leakage to stop working, while the air conditioner without refrigerant leakage continues to work, thereby maximizing the use of the air conditioner.

[0028] Figure 1 FIG. 1 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention. The method is applied to any one air conditioner (referred to as the target air conditioner) in the same space as mentioned above as an example.

[0029] Reference Figure 1 , the control method of the air conditioner may include:

[0030] S110, during the operation of the indoor fan of the target air conditioner, obtaining an air inlet temperature and a first refrigerant concentration at an indoor air inlet of the target air conditioner, and an air outlet temperature and a second refrigerant concentration at an indoor air outlet of the target air conditioner.

[0031] Exemplarily, the target air conditioner includes an indoor fan, an indoor air inlet, and an indoor air outlet, and an inlet temperature sensor and a first refrigerant concentration sensor are provided at the indoor air inlet, and an outlet temperature sensor and a second refrigerant concentration sensor are provided at the indoor air outlet. During the operation of the indoor fan, the inlet temperature T1 at the indoor air inlet is obtained by the inlet temperature sensor, the first refrigerant concentration C1 at the indoor air inlet is obtained by the first refrigerant concentration sensor, the outlet temperature T10 at the indoor air outlet is obtained by the outlet temperature sensor, and the second refrigerant concentration C2 at the indoor air outlet is obtained by the second refrigerant concentration sensor.

[0032] S120, determining a refrigerant leakage source according to the inlet air temperature, the first refrigerant concentration, the outlet air temperature, and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

[0033] Specifically, the refrigerant leakage source refers to the air conditioner where the refrigerant leakage occurs, which may be the target air conditioner or another air conditioner in the same space as the target air conditioner.

[0034] Exemplarily, after obtaining the inlet air temperature T1 and the first refrigerant concentration C1 at the indoor air inlet of the target air conditioner, and the outlet air temperature T10 and the second refrigerant concentration C2 at the indoor air outlet, it is possible to determine whether a refrigerant leak occurs by judging whether the inlet air temperature T1, the outlet air temperature T10, the first refrigerant concentration C1 and the second refrigerant concentration C2 meet the preset conditions, and when a refrigerant leak occurs, it is determined whether the refrigerant leak occurs in the target air conditioner or in other air conditioners in the same space as the target air conditioner. When a refrigerant leak occurs in the target air conditioner and no refrigerant leak occurs in other air conditioners, the target air conditioner is controlled to stop working, while the other air conditioners can continue to work; when a refrigerant leak occurs in other air conditioners and no refrigerant leak occurs in the target air conditioner, the other air conditioners can be controlled to stop working, while the target air conditioner can continue to work. In this way, some air conditioners can continue to work, thereby maximizing the use of the air conditioner.

[0035] In some embodiments, the refrigerant leakage source is determined based on the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, including: when the inlet air temperature and the outlet air temperature meet the first preset condition and the first refrigerant concentration and the second refrigerant concentration are not equal, or the inlet air temperature and the outlet air temperature meet the second preset condition, determining that the refrigerant leakage source is the target air conditioner; when the inlet air temperature and the outlet air temperature meet the first preset condition and the first refrigerant concentration and the second refrigerant concentration are equal and not zero, determining that the refrigerant leakage source is other air conditioners; when the inlet air temperature and the outlet air temperature meet the first preset condition and the first refrigerant concentration and the second refrigerant concentration are equal and zero, determining that there is no refrigerant leakage source.

[0036] Specifically, when the inlet temperature T1 and outlet temperature T10 of the target air conditioner meet the first preset condition, whether the air conditioner in the space has refrigerant leakage and the refrigerant leakage source when refrigerant leakage occurs can be determined based on the first refrigerant concentration C1 and the second refrigerant concentration C2 of the target air conditioner.

[0037] For example, take the target air conditioner running in cooling mode as an example. When the outlet air temperature T10 of the target air conditioner is less than the inlet air temperature T1, it means that the target air conditioner can cool normally. At this time, if the first refrigerant concentration C1≠the second refrigerant concentration C2, it means that the indoor heat exchanger of the target air conditioner has a refrigerant leak, and the indoor fan operation will blow the leaked refrigerant to the indoor air outlet, resulting in different refrigerant concentrations at the indoor air inlet and the indoor air outlet. At this time, the refrigerant leakage source is determined to be the target air conditioner; if the first refrigerant concentration C1=the second refrigerant concentration C2≠0, it means that the indoor heat exchanger of the target air conditioner has not a refrigerant leak, and the reason for the refrigerant concentration not being zero is that other air conditioners in the same space have a refrigerant leak, and at this time, the refrigerant leakage source is determined to be other air conditioners; if the first refrigerant concentration C1=the second refrigerant concentration C2=0, it means that neither the target air conditioner nor other air conditioners have a refrigerant leak.

[0038] When the air inlet temperature T1 and the air outlet temperature T10 of the target air conditioner meet the second preset condition, the refrigerant leakage source can be directly determined to be the target air conditioner.

[0039] For example, take the target air conditioner running in cooling mode as an example. When the outlet air temperature T10 of the target air conditioner is ≥ the inlet air temperature T1, it means that the target air conditioner cannot cool normally. It may be that the indoor heat exchanger of the target air conditioner leaks too much refrigerant in a short period of time. At this time, the refrigerant leakage source is determined to be the target air conditioner.

[0040] In this way, based on the inlet temperature, outlet temperature, first refrigerant concentration and second refrigerant concentration of the target air conditioner, it is possible to quickly and accurately identify whether a refrigerant leak occurs in the air conditioner in the same space and the source of the refrigerant leakage when a refrigerant leak occurs, thereby facilitating the control of the air conditioner with refrigerant leakage to stop working, while the air conditioner without refrigerant leakage can continue to work, thereby maximizing the use of the air conditioner.

[0041] In some embodiments, the method also includes: obtaining the operating mode of the target air conditioner; when the operating mode is a cooling mode, the first preset condition is that the outlet air temperature is less than the inlet air temperature, and the second preset condition is that the outlet air temperature is greater than or equal to the inlet air temperature; when the operating mode is a heating mode, the first preset condition is that the inlet air temperature is less than the outlet air temperature, and the second preset condition is that the inlet air temperature is greater than or equal to the outlet air temperature.

[0042] Specifically, the first preset condition and the second preset condition may be set according to the operating mode of the target air conditioner. The operating mode of the target air conditioner may include a cooling mode and a heating mode. Different operating modes correspond to different first preset conditions and second preset conditions.

[0043] When the target air conditioner is operating in cooling mode, the first preset condition is: outlet air temperature T10<inlet air temperature T1, and the second preset condition is: outlet air temperature T10≥inlet air temperature T1; when the target air conditioner is operating in heating mode, the first preset condition is: inlet air temperature T1<outlet air temperature T10, and the second preset condition is: inlet air temperature T1≥outlet air temperature T10.

[0044] Exemplarily, when the target air conditioner is running in cooling mode, if the outlet air temperature T10 is less than the inlet air temperature T1, it means that the target air conditioner can be cooled normally. In this state, if the first refrigerant concentration C1≠the second refrigerant concentration C2, the refrigerant leakage source is determined to be the target air conditioner; if the first refrigerant concentration C1=the second refrigerant concentration C2≠0, the refrigerant leakage source is determined to be other air conditioners; if the first refrigerant concentration C1=the second refrigerant concentration C2=0, the refrigerant leakage does not occur in the target air conditioner and other air conditioners. When the target air conditioner is running in cooling mode, if the outlet air temperature T10≥the inlet air temperature T1, it means that the cooling function of the target air conditioner fails, and the leakage source is determined to be the target air conditioner.

[0045] It should be noted that when the target air conditioner is operating in heating mode, except that the first preset condition and the second preset condition are opposite to those corresponding to the cooling mode, the method for determining the remaining refrigerant leakage sources is the same as when the target air conditioner is operating in cooling mode, and will not be elaborated here.

[0046] In some embodiments, after determining the refrigerant leakage source, the method further includes: when the refrigerant leakage source is a target air conditioner, determining the refrigerant leakage situation of the target air conditioner according to the first refrigerant concentration and the second refrigerant concentration; when the refrigerant leakage source is other air conditioners, determining the refrigerant leakage situation of the other air conditioners according to the second refrigerant concentration.

[0047] Specifically, when the refrigerant leakage source is determined in the above manner, the refrigerant leakage situation can be further determined according to the first refrigerant concentration C1 and the second refrigerant concentration C2 of the target air conditioner. For example, the refrigerant source leakage situation can be divided into light refrigerant leakage and heavy refrigerant leakage.

[0048] Exemplarily, when the refrigerant leakage source is the target air conditioner, it can be determined whether the target air conditioner has a slight refrigerant leakage or a severe refrigerant leakage based on the first refrigerant concentration C1 and the second refrigerant concentration C2 of the target air conditioner. For example, when the outlet air temperature T10 is less than the inlet air temperature T1, if the first refrigerant concentration C1 is a smaller value and the second refrigerant concentration C2 is a larger value, it means that the target air conditioner has a slight refrigerant leakage; when the refrigerant leakage source is other air conditioners, it can be determined whether the other air conditioners have a slight refrigerant leakage or a severe refrigerant leakage based on the second refrigerant concentration C2. For example, when the outlet air temperature T10 is less than the inlet air temperature T1, if the second refrigerant concentration C2 is a smaller value, it means that the other air conditioners have a slight refrigerant leakage. In this way, not only the refrigerant leakage source can be determined, but also the refrigerant leakage situation can be further determined, and then corresponding reminder information can be issued or corresponding processing can be made based on the refrigerant leakage situation.

[0049] In some embodiments, the refrigerant leakage of the target air conditioner is determined based on the first refrigerant concentration and the second refrigerant concentration, including: when the inlet temperature and the outlet temperature meet the first preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the first preset concentration and less than the second preset concentration, then the refrigerant leakage of the target air conditioner is determined to be a mild refrigerant leakage; when the inlet temperature and the outlet temperature meet the second preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the second preset concentration, then the refrigerant leakage of the target air conditioner is determined to be a severe refrigerant leakage.

[0050] Specifically, when it is determined that the refrigerant leakage source is the target air conditioner, the first refrigerant concentration C1 and the second refrigerant concentration C2 of the target air conditioner can be compared with the first preset concentration and the second preset concentration to determine whether the target air conditioner has a slight refrigerant leakage or a severe refrigerant leakage. The first preset concentration and the second preset concentration can be set according to actual conditions. For example, the first preset concentration can be a low concentration threshold value Ca that reaches flammability, and the second preset concentration can be a high concentration threshold value Cb that reaches severe leakage.

[0051] Exemplarily, when the target air conditioner is running in cooling mode, if the outlet air temperature T10 is less than the inlet air temperature T1, and the first refrigerant concentration C1 is less than the first preset concentration Ca ≤ the second refrigerant concentration C2 is less than the second preset concentration Cb, it is possible that the target air conditioner has just started to leak refrigerant, and at this time, it is determined that the target air conditioner has a slight refrigerant leak. If the outlet air temperature T10 ≥ the inlet air temperature T1, and the first refrigerant concentration C1 is less than the first preset concentration Ca, and the second refrigerant concentration C2 ≥ the second preset concentration Cb, it is possible that the target air conditioner has leaked too much refrigerant in a short period of time, and at this time, it is determined that the target air conditioner has a severe refrigerant leak.

[0052] It should be noted that when the target air conditioner is operating in heating mode, except that the first preset condition and the second preset condition are opposite to those corresponding to the cooling mode, the remaining methods for determining refrigerant leakage are the same as when the target air conditioner is operating in cooling mode, and will not be elaborated here.

[0053] In some embodiments, the refrigerant leakage of other air conditioners is determined based on the second refrigerant concentration, including: if the second refrigerant concentration is greater than zero and less than the first preset concentration, the refrigerant leakage of other air conditioners is determined to be a mild refrigerant leakage; if the second refrigerant concentration is greater than or equal to the first preset concentration, the refrigerant leakage of other air conditioners is determined to be a severe refrigerant leakage.

[0054] Specifically, when it is determined that the refrigerant leakage source is other air conditioners, the second refrigerant concentration C2 of the target air conditioner can be compared with the first preset concentration Ca and the second preset concentration Cb to determine whether the other air conditioners have a slight refrigerant leakage or a severe refrigerant leakage.

[0055] Exemplarily, when the target air conditioner is operating in cooling mode, if the outlet air temperature T10 is less than the inlet air temperature T1, and the first refrigerant concentration C1 is equal to the second refrigerant concentration C2, and 0 is less than the second refrigerant concentration C2 and less than the first preset concentration Ca, then it is determined that the other air conditioners have a slight refrigerant leakage; if the outlet air temperature T10 is less than the inlet air temperature T1, and the first refrigerant concentration C1 is equal to the second refrigerant concentration C2 and the second refrigerant concentration C2 is greater than or equal to the first preset concentration Ca, then it is determined that the other air conditioners have a severe refrigerant leakage.

[0056] It should be noted that when the target air conditioner is operating in heating mode, except that the first preset condition and the second preset condition are opposite to those corresponding to the cooling mode, the remaining methods for determining refrigerant leakage are the same as when the target air conditioner is operating in cooling mode, and will not be elaborated here.

[0057] In some embodiments, after determining the refrigerant leakage situation of the target air conditioner, the method also includes: when the refrigerant leakage situation of the target air conditioner is a mild refrigerant leakage, controlling the outdoor unit of the target air conditioner to shut down, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outside; when the refrigerant leakage situation of the target air conditioner is a severe refrigerant leakage, controlling the indoor fan and the outdoor unit to shut down, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outside.

[0058] Specifically, the target air conditioner also includes an exhaust system, which may include an exhaust passage and an exhaust fan arranged in the exhaust passage. The exhaust passage may be connected to the outdoor side to discharge the leaked refrigerant to the outdoor side.

[0059] Exemplarily, when a slight refrigerant leakage occurs in the target air conditioner, the outdoor unit of the target air conditioner is controlled to stop, such as controlling the compressor in the outdoor unit to stop, and controlling the indoor unit to display the refrigerant leakage warning code, pushing the APP warning, and controlling the exhaust system of the target air conditioner to work to discharge the leaked refrigerant to the outside; when a severe refrigerant leakage occurs in the target air conditioner, the indoor fan of the target air conditioner is controlled (reducing the refrigerant blowing into the room, resulting in an increase in the indoor refrigerant concentration) and the outdoor unit are stopped, such as controlling the compressor in the outdoor unit to stop, and controlling the indoor unit to display the refrigerant leakage warning code, pushing the APP warning, and controlling the exhaust system of the target air conditioner to work to discharge the leaked refrigerant to the outside. Among them, the refrigerant leakage warning record is stored in the memory of the indoor unit, and the warning record needs to be reset by after-sales personnel.

[0060] In this way, when a refrigerant leak occurs in the target air conditioner, the leaked refrigerant is discharged to the outside through the exhaust system, which can reduce the leaked refrigerant entering the room and improve indoor safety.

[0061] In some embodiments, after determining the refrigerant leakage of other air conditioners, the method also includes: when the refrigerant leakage of other air conditioners is a mild refrigerant leakage, controlling the target air conditioner to issue a first reminder message; when the refrigerant leakage of other air conditioners is a severe refrigerant leakage, controlling the target air conditioner to issue a first reminder message, and controlling the exhaust system of the target air conditioner to discharge the leaked refrigerant to the outside.

[0062] For example, when other air conditioners have a slight refrigerant leak, the target air conditioner is controlled to send a reminder message, such as displaying a detection prompt on the indoor unit, and pushing an APP to prompt the user to repair other air conditioners in the space, and the target air conditioner continues to operate. When other air conditioners have a serious refrigerant leak, the target air conditioner is controlled to send a reminder message, such as displaying a detection prompt on the indoor unit, pushing an APP warning, and at the same time controlling the exhaust system of the target air conditioner to discharge the leaked refrigerant to the outside. That is to say, when other air conditioners leak a lot of refrigerant, the target air conditioner can be controlled to discharge the refrigerant leaked to its surroundings.

[0063] In some embodiments, the exhaust system includes an exhaust channel and an exhaust fan, and the exhaust system of the target air conditioner is controlled to operate to discharge the leaked refrigerant to the outside, including: determining the target speed of the exhaust fan according to the second refrigerant concentration; controlling the exhaust channel to be in an open state, and controlling the exhaust fan to operate at the target speed.

[0064] Specifically, when the leaked refrigerant is discharged to the outside through the exhaust system, the speed of the exhaust fan in the exhaust system can be determined based on the second refrigerant concentration of the target air conditioner, so as to increase the refrigerant discharge speed while avoiding sparks in the circuit caused by excessive power, thereby improving the safety of refrigerant discharge.

[0065] For example, when a light or heavy refrigerant leakage occurs in the target air conditioner, or a heavy refrigerant leakage occurs in other air conditioners, the exhaust passage is controlled to be in an open state, and the target speed of the exhaust fan is determined according to the second refrigerant concentration C2, and the exhaust fan is controlled to operate at the target speed to discharge the leaked refrigerant to the outside. For example, when the second refrigerant concentration C2 is too large, a larger speed can be selected under the condition of avoiding sparks, so as to increase the speed of refrigerant discharge while improving safety.

[0066] In some embodiments, the target speed of the exhaust fan is determined based on the second refrigerant concentration, including: when the second refrigerant concentration is less than the second preset concentration, obtaining the ratio of the second refrigerant concentration to the second preset concentration and the product of the ratio and the maximum allowable speed of the exhaust fan to obtain the target speed; when the second refrigerant concentration is greater than or equal to the second preset concentration, using the maximum allowable speed as the target speed.

[0067] Specifically, the target speed of the exhaust fan is used to reflect the desired exhaust rate. For example, the greater the target speed of the exhaust fan, the greater the desired exhaust rate. The maximum allowable speed of the exhaust fan is N, and the target speed of the exhaust fan is specifically determined according to the second refrigerant concentration C2.

[0068] Exemplarily, when the second refrigerant concentration C2 is less than the second preset concentration Cb, the target speed n of the exhaust fan is equal to the maximum speed N×the second refrigerant concentration C2 / the second preset concentration Cb; when the second refrigerant concentration C2 is greater than or equal to the second preset concentration Cb, the target speed of the exhaust fan is the maximum allowable speed N.

[0069] In this way, when a refrigerant leak occurs, the leaked refrigerant is discharged to the outside through the exhaust system, and the circuit load of the exhaust fan is taken into consideration, thereby improving the safety of the exhaust.

[0070] It should be noted that the above-mentioned exhaust system can be a fresh air system built into the target air conditioner, or can be an exhaust system independent of the target air conditioner and linked with the target air conditioner.

[0071] Take the exhaust system as the fresh air system of the target air conditioner as an example. Exemplarily, the target air conditioner includes an outdoor unit and an indoor unit. Figure 2 The indoor unit includes an indoor air inlet 401, an indoor air outlet 402, a main air duct 403 connecting the indoor air inlet 401 and the indoor air outlet 402, and a fresh air system. The main air duct 403 is provided with an indoor fan 404, a water tray 405, an indoor heat exchanger 406, a heater 407 and other components, and a refrigerant concentration sensor 408 is provided at the indoor air outlet 402. The fresh air system includes a fresh air inlet 409, a fresh air outlet 410, and a fresh air duct 411 connecting the fresh air inlet 409 and the fresh air outlet 410. The fresh air duct 411 is provided with a fresh air fan 412 and other components. The fresh air duct 411 is provided with a connecting shaft 413, one end of the connecting shaft 413 is fixed to the fresh air duct 411, and the other end is connected to a hinge 414.

[0072] During normal operation of the target air conditioner, the connecting shaft 413 drives the hinge 414 to be located in the first position (horizontal position), so that the fresh air duct 411 and the main air duct 403 are in a non-connected state and the fresh air outlet 410 is in an open state, and the indoor air enters the main air duct 403 from the indoor air inlet 401, and driven by the indoor fan 404, after heat exchange through the indoor heat exchanger 406 and the heater 407, it returns to the room through the indoor air outlet 402; the outdoor air enters the fresh air duct 411 through the fresh air inlet 409, and driven by the fresh air fan 412, enters the room through the fresh air outlet 410.

[0073] When the target air conditioner has a slight or severe refrigerant leakage, the connecting shaft 413 drives the hinge 414 to be located at the second position (vertical position), so that the fresh air duct 411 is connected to the main air duct 403 and the fresh air outlet 410 is closed. Driven by the indoor fan 404 and the fresh air fan 412, the refrigerant leaked in the main air duct 403 enters the fresh air duct 411 and is quickly discharged to the outside through the fresh air duct 411 and the fresh air inlet 409 to reduce the safety hazards caused by the refrigerant leakage. At this time, the fresh air fan 412 serves as an exhaust fan and the fresh air duct 411 serves as an exhaust channel. In addition, in this process, the target speed of the fresh air fan 412 is also determined according to the second refrigerant concentration C2 detected by the refrigerant concentration sensor 408.

[0074] When a severe refrigerant leakage occurs in other air conditioners, one method is to adopt the same method as when a slight refrigerant leakage or a severe refrigerant leakage occurs in the target air conditioner, that is, the connecting shaft 413 drives the hinge 414 to be located in the second position (vertical position), so that the fresh air duct 411 and the main air duct 403 are in a connected state and the fresh air outlet 410 is in a closed state. Driven by the indoor fan 404 and the fresh air fan 412, the indoor refrigerant enters the main air duct 403 from the indoor air outlet 402, and is then discharged to the outside through the fresh air duct 411. At this time, the fresh air fan 41 2 as an exhaust fan, and the fresh air duct 411 as an exhaust channel; another way is that the connecting shaft 413 drives the hinge 414 to be located in the first position (horizontal position), so that the fresh air duct 411 and the main air duct 403 are in a non-connected state and the fresh air outlet 410 is in an open state, and driven by the fresh air fan 412, the indoor refrigerant enters the fresh air duct 411 from the fresh air outlet 410, and is quickly discharged to the outside through the fresh air duct 411 and the fresh air inlet 409. At this time, the fresh air fan 412 serves as an exhaust fan, and the fresh air duct 411 serves as an exhaust channel. In addition, in the above process, the target speed of the fresh air fan 412 is also determined according to the second refrigerant concentration C2 detected by the refrigerant concentration sensor 408.

[0075] In this way, the discharge of refrigerant can be achieved by using the fresh air system built into the target air conditioner as an exhaust system. For an independent exhaust system, the simplest structure can be used, such as an exhaust duct and an exhaust fan, which will not be described in detail here.

[0076] As a specific example, Figure 3 FIG. 1 is a flow chart of a method for controlling an air conditioner according to another embodiment of the present invention. Figure 3 , the control method of the air conditioner may include:

[0077] S201, the target air conditioner operates in a cooling mode.

[0078] S202, determine whether the indoor fan of the target air conditioner is in operation, if yes, execute S203, if not, return to S201.

[0079] S203, obtaining the air inlet temperature T1, the air outlet temperature T10, the first refrigerant concentration C1 and the second refrigerant concentration C2 of the target air conditioner.

[0080] S204, determine whether T10<T1 is satisfied, if yes, execute S205, if no, execute S211.

[0081] S205, determine whether C1=C2 is satisfied, if yes, execute S206, if no, execute S208.

[0082] S206, determine whether C2=0 is satisfied, if yes, execute S207, if no, execute S215.

[0083] S207, the target air conditioner and other air conditioners are in normal operation.

[0084] That is, when the target air conditioner is operating in the cooling mode, if T10<T1 and C1=C2=0, it is determined that the target air conditioner and other air conditioners in the space are in normal operation and no refrigerant leakage occurs.

[0085] S208, determine whether C1<Ca≤C2<Cb is satisfied, if yes, execute S209, if not, return to S205.

[0086] S209, determining whether there is no warning record in the memory, if yes, executing S210, if no, executing S221.

[0087] S210, the indoor unit of the target air conditioner begins to leak refrigerant, the outdoor unit stops running, the indoor unit displays a refrigerant leak warning code, an APP warning is pushed, and the exhaust system discharges the refrigerant.

[0088] That is to say, when the target air conditioner is operating in cooling mode, if T10<T1 and C1<Ca≤C2<Cb and there is no refrigerant leakage warning record in the memory, it is determined that the indoor unit of the target air conditioner has just begun to leak refrigerant. At this time, the outdoor unit is controlled to stop running, the indoor unit displays the refrigerant leakage warning code, the APP warning is pushed, and the exhaust system is controlled to discharge the leaked refrigerant to the outside according to C2 until C2<Ca.

[0089] S211, determine whether C1<Ca is satisfied, if yes, execute S212, if no, return to S204.

[0090] S212, determine whether C2≥Cb is satisfied, if yes, execute S213, if no, return to S204.

[0091] S213, determine whether there is no warning record in the memory, if yes, execute S214, if not, execute S221.

[0092] S214, the indoor unit of the target air conditioner leaks too much refrigerant in a short period of time, the outdoor unit stops running, the indoor fan is turned off, the indoor unit displays a refrigerant leakage warning code, the APP alert is pushed, and the exhaust system discharges the refrigerant.

[0093] That is to say, when the target air conditioner is operating in cooling mode, if T10≥T1 and C1<Ca and C2≥Cb and there is no refrigerant leakage warning record in the memory, it is determined that the indoor unit of the target air conditioner has leaked too much refrigerant in a short period of time. At this time, the outdoor unit is controlled to stop running, the indoor fan is turned off, the indoor unit displays the refrigerant leakage warning code, the APP warning is pushed, and the exhaust system is controlled to discharge the leaked refrigerant to the outside according to C2 until C2<Ca.

[0094] S215, determine whether 0<C2<Ca is satisfied, if yes, execute S216, if no, execute S218.

[0095] S216, determining whether there is no warning record in the memory, if yes, executing S217, if not, executing S221.

[0096] S217, determining that other air conditioners in the same space have slight refrigerant leakage.

[0097] That is to say, when the target air conditioner is operating in cooling mode, if T10<T1 and C1=C2 and 0<C2<Ca (to improve accuracy, the time limit can be increased, such as continuing for a preset time ta) and there is no refrigerant leakage warning record in the memory, it is determined that a slight refrigerant leakage has occurred in other air conditioners. At this time, the indoor unit displays the refrigerant leakage warning code, pushes the APP warning, and the target air conditioner continues to work.

[0098] S218, determine whether Ca≤C2 is satisfied, if yes, execute S219, if no, return to S205.

[0099] S219, determining whether there is no warning record in the memory, if yes, executing S220, if no, executing S221.

[0100] S220, determining that other air conditioners in the same space have severe refrigerant leakage.

[0101] That is to say, when the target air conditioner is operating in cooling mode, if T10<T1 and C1=C2 and C2≥Ca (to improve accuracy, a time limit can be added, such as continuing for a preset time ta) and there is no refrigerant leakage warning record in the memory, it is determined that other air conditioners have a severe refrigerant leakage. At this time, the indoor unit displays the refrigerant leakage warning code, pushes the APP warning, and controls the exhaust system to discharge the leaked refrigerant to the outside according to C2 until C2<Ca.

[0102] S221, the refrigerant leakage warning record in the storage device needs to be reset by after-sales personnel.

[0103] In this way, based on the inlet air temperature, the outlet air temperature, the first refrigerant concentration, and the second refrigerant concentration, the specific air conditioner with the refrigerant leak can be quickly and accurately identified to maximize the use of the air conditioner.

[0104] It should be noted that when the target air conditioner is in heating mode, the conditions satisfied by T10 and T1 only need to be adjusted, and the other conditions remain unchanged.

[0105] In summary, according to the control method, device and storage medium of the air conditioner of the embodiment of the present invention, during the operation of the indoor fan of the target air conditioner, the inlet temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, as well as the outlet temperature and the second refrigerant concentration at the indoor air outlet are obtained. According to the inlet temperature, the first refrigerant concentration, the outlet temperature and the second refrigerant concentration, the specific air conditioner where the refrigerant leakage occurs can be accurately determined. In this way, only the air conditioner where the refrigerant leakage occurs can be controlled to stop working, while the air conditioner where the refrigerant leakage does not occur can continue to work, thereby maximizing the use of the air conditioner.

[0106] In some embodiments, a computer-readable storage medium is further provided, on which a program is stored, and when the program is executed by a processor, the control method of the target air conditioner is implemented.

[0107] It should be noted that the above-mentioned explanation of the embodiment and beneficial effects of the control method for the target air conditioner is also applicable to the computer-readable storage medium of the embodiment of the present invention, and will not be elaborated here in detail to avoid redundancy.

[0108] In some embodiments, a target air conditioner is also provided, including: a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, the aforementioned control method of the target air conditioner is implemented.

[0109] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the air conditioner control method are also applicable to the air conditioner of the embodiment of the present invention, and will not be elaborated here in detail to avoid redundancy.

[0110] In some embodiments, a control device for an air conditioner is also provided.

[0111] Reference Figure 4 The control device 300 of the air conditioner includes: an acquisition module 310 and a control module 320, wherein the acquisition module 310 is used to obtain the inlet air temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, and the outlet air temperature and the second refrigerant concentration at the indoor air outlet during the operation of the indoor fan of the target air conditioner; the control module 320 is used to determine the refrigerant leakage source according to the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

[0112] According to one embodiment of the present invention, the control module 320 is specifically used to: when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are not equal, or the inlet air temperature and the outlet air temperature meet the second preset condition, determine that the refrigerant leakage source is the target air conditioner; when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal and not zero, determine that the refrigerant leakage source is other air conditioners; when the inlet air temperature and the outlet air temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal and zero, determine that there is no refrigerant leakage source.

[0113] According to one embodiment of the present invention, the control module 320 is also used to: when the refrigerant leakage source is the target air conditioner, determine the refrigerant leakage situation of the target air conditioner according to the first refrigerant concentration and the second refrigerant concentration; when the refrigerant leakage source is other air conditioners, determine the refrigerant leakage situation of the other air conditioners according to the second refrigerant concentration.

[0114] According to one embodiment of the present invention, the control module 320 is specifically used for: when the inlet air temperature and the outlet air temperature meet the first preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the first preset concentration and less than the second preset concentration, then determining that the refrigerant leakage of the target air conditioner is a slight refrigerant leakage; when the inlet air temperature and the outlet air temperature meet the second preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the second preset concentration, then determining that the refrigerant leakage of the target air conditioner is a severe refrigerant leakage.

[0115] According to one embodiment of the present invention, the control module 320 is specifically used to: if the second refrigerant concentration is greater than zero and less than the first preset concentration, determine that the leakage of other air conditioners is a mild refrigerant leakage; if the second refrigerant concentration is greater than or equal to the first preset concentration, determine that the refrigerant leakage of other air conditioners is a severe refrigerant leakage.

[0116] According to one embodiment of the present invention, the control module 320 is also used to: obtain the operating mode of the target air conditioner; when the operating mode is the cooling mode, the first preset condition is that the outlet air temperature is lower than the inlet air temperature, and the second preset condition is that the outlet air temperature is greater than or equal to the inlet air temperature; when the operating mode is the heating mode, the first preset condition is that the inlet air temperature is lower than the outlet air temperature, and the second preset condition is that the inlet air temperature is greater than or equal to the outlet air temperature.

[0117] According to one embodiment of the present invention, the control module 320 is also used for: when the refrigerant leakage of the target air conditioner is a slight refrigerant leakage, controlling the outdoor unit of the target air conditioner to shut down, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outdoors; when the refrigerant leakage of the target air conditioner is a severe refrigerant leakage, controlling the indoor fan and the outdoor unit to shut down, and controlling the exhaust system of the target air conditioner to operate so as to discharge the leaked refrigerant to the outdoors.

[0118] According to one embodiment of the present invention, the control module 320 is also used to: when the refrigerant leakage of other air conditioners is a minor refrigerant leakage, control the target air conditioner to send a first reminder message; when the refrigerant leakage of other air conditioners is a severe refrigerant leakage, control the target air conditioner to send a first reminder message, and control the exhaust system of the target air conditioner to discharge the leaked refrigerant to the outside.

[0119] According to an embodiment of the present invention, the control module 320 is specifically used to: determine a target speed of the exhaust fan according to the second refrigerant concentration; control the exhaust passage to be in an open state, and control the exhaust fan to operate at the target speed.

[0120] According to one embodiment of the present invention, the control module 320 is specifically used to: when the second refrigerant concentration is less than the second preset concentration, obtain the ratio of the second refrigerant concentration to the second preset concentration, and multiply it by the maximum allowable speed of the exhaust fan to obtain the target speed; when the second refrigerant concentration is greater than or equal to the second preset concentration, use the maximum allowable speed as the target speed.

[0121] It should be pointed out that the above-mentioned explanation of the embodiments and beneficial effects of the air conditioner control method are also applicable to the air conditioner control device of the embodiment of the present invention, and will not be elaborated here in detail to avoid redundancy.

[0122] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0123] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0124] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0125] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0126] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0127] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The method comprises: During the operation of the indoor fan of the target air conditioner, obtaining the air inlet temperature and the first refrigerant concentration at the indoor air inlet of the target air conditioner, and the air outlet temperature and the second refrigerant concentration at the indoor air outlet; A refrigerant leakage source is determined according to the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

2. The method according to claim 1, characterized in that The determining of the refrigerant leakage source according to the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration includes: When the air inlet temperature and the air outlet temperature meet a first preset condition, and the first refrigerant concentration and the second refrigerant concentration are not equal, or when the air inlet temperature and the air outlet temperature meet a second preset condition, determining that the refrigerant leakage source is the target air conditioner; When the air inlet temperature and the air outlet temperature meet the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal and not zero, determining that the refrigerant leakage source is the other air conditioner; When the inlet air temperature and the outlet air temperature satisfy the first preset condition, and the first refrigerant concentration and the second refrigerant concentration are equal to and zero, it is determined that there is no refrigerant leakage source.

3. The method according to claim 2, characterized in that After determining the refrigerant leakage source, the method further includes: When the refrigerant leakage source is the target air conditioner, determining the refrigerant leakage condition of the target air conditioner according to the first refrigerant concentration and the second refrigerant concentration; When the refrigerant leakage source is the other air conditioner, the refrigerant leakage status of the other air conditioner is determined according to the second refrigerant concentration.

4. The method according to claim 3, characterized in that: The determining the refrigerant leakage of the target air conditioner according to the first refrigerant concentration and the second refrigerant concentration includes: When the air inlet temperature and the air outlet temperature meet the first preset condition, if the first refrigerant concentration is less than the first preset concentration, and the second refrigerant concentration is greater than or equal to the first preset concentration and less than the second preset concentration, then the refrigerant leakage of the target air conditioner is determined to be a slight refrigerant leakage; When the air inlet temperature and the air outlet temperature meet the second preset condition, if the first refrigerant concentration is less than the first preset concentration and the second refrigerant concentration is greater than or equal to the second preset concentration, it is determined that the refrigerant leakage of the target air conditioner is a severe refrigerant leakage.

5. The method according to claim 3, characterized in that: The determining of the refrigerant leakage of the other air conditioners according to the second refrigerant concentration includes: If the second refrigerant concentration is greater than zero and less than the first preset concentration, determining that the refrigerant leakage of the other air conditioner is a slight refrigerant leakage; If the second refrigerant concentration is greater than or equal to the first preset concentration, it is determined that the refrigerant leakage of the other air conditioner is a severe refrigerant leakage.

6. The method according to any one of claims 2 to 5, characterized in that: The method further comprises: Acquiring an operating mode of the target air conditioner; When the operation mode is the cooling mode, the first preset condition is that the air outlet temperature is less than the air inlet temperature, and the second preset condition is that the air outlet temperature is greater than or equal to the air inlet temperature; When the operation mode is the heating mode, the first preset condition is that the inlet air temperature is less than the outlet air temperature, and the second preset condition is that the inlet air temperature is greater than or equal to the outlet air temperature.

7. The method according to claim 4, characterized in that After determining the refrigerant leakage of the target air conditioner, the method further includes: When the refrigerant leakage of the target air conditioner is a slight refrigerant leakage, the outdoor unit of the target air conditioner is controlled to be shut down, and the exhaust system of the target air conditioner is controlled to operate to discharge the leaked refrigerant to the outside; When the refrigerant leakage of the target air conditioner is a severe refrigerant leakage, the indoor fan and the outdoor unit are controlled to stop, and the exhaust system of the target air conditioner is controlled to operate to discharge the leaked refrigerant to the outside.

8. The method according to claim 5, characterized in that After determining the refrigerant leakage of the other air conditioners, the method further includes: When the refrigerant leakage of the other air conditioners is a slight refrigerant leakage, controlling the target air conditioner to send a first reminder message; When the refrigerant leakage of the other air conditioners is a severe refrigerant leakage, the target air conditioner is controlled to send the first reminder information, and the exhaust system of the target air conditioner is controlled to operate to discharge the leaked refrigerant to the outside.

9. The method according to claim 7 or 8, characterized in that: The exhaust system includes an exhaust passage and an exhaust fan, and the exhaust system of the target air conditioner is controlled to operate so as to discharge the leaked refrigerant to the outside, including: determining a target speed of the exhaust fan according to the concentration of the second refrigerant; The exhaust passage is controlled to be in an open state, and the exhaust fan is controlled to operate at the target speed.

10. The method according to claim 9, characterized in that The step of determining the target speed of the exhaust fan according to the second refrigerant concentration includes: When the second refrigerant concentration is less than a second preset concentration, obtaining a ratio of the second refrigerant concentration to the second preset concentration and a product of the ratio and the maximum allowable speed of the exhaust fan to obtain the target speed; When the second refrigerant concentration is greater than or equal to the second preset concentration, the maximum allowable rotational speed is used as the target rotational speed.

11. A computer-readable storage medium, characterized in that: A program is stored thereon, and when the program is executed by a processor, the control method of the air conditioner according to any one of claims 1-10 is implemented.

12. An air conditioner, characterized in that: include: A memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for controlling the air conditioner according to any one of claims 1 to 10 is implemented.

13. A control device for an air conditioner, characterized in that: The device comprises: An acquisition module, used to acquire an air inlet temperature and a first refrigerant concentration at an indoor air inlet of the target air conditioner, and an air outlet temperature and a second refrigerant concentration at an indoor air outlet of the target air conditioner during operation of the indoor fan of the target air conditioner; A control module is used to determine a refrigerant leakage source based on the inlet air temperature, the first refrigerant concentration, the outlet air temperature and the second refrigerant concentration, wherein the refrigerant leakage source is the target air conditioner or other air conditioners in the same space as the target air conditioner.

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