Air conditioner, refrigerant leakage control method and device thereof and storage medium

Abstract

The invention discloses an air conditioner, a refrigerant leakage control method and device of the air conditioner and a storage medium. The method comprises the steps that when refrigerant leakage exists in an indoor unit, an outdoor unit is controlled to be in a shutdown state, the air outlet angle of a main air outlet is controlled to face a fresh air outlet, a main fan is controlled to run in the first direction, and a fresh air fan is controlled to run in the second direction, and the second direction is opposite to the first direction, so that a refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence. Therefore, the refrigerant leaked into the main air duct is efficiently discharged out of the room through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, and potential safety hazards caused by refrigerant leakage are reduced to a certain extent.

Description

Technical Field

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

[0002] In the related art, when the air conditioner is in use, if a refrigerant leak occurs in the indoor unit, the refrigerant in the indoor unit will be discharged into the room by starting the indoor fan. However, this method has the problems of low refrigerant discharge efficiency and poor safety.

[0003] It should be noted that the information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the purpose of the present invention is to provide an air conditioner and a refrigerant leakage control method, device and storage medium thereof, which, when there is refrigerant leakage in the indoor unit, controls the outlet angle of the main air outlet to face the fresh air outlet, controls the main fan to run in a first direction and controls the fresh air fan to run in a second direction, so as to efficiently discharge the refrigerant leaked into the main air duct to the outside through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present invention provides a refrigerant leakage control method for an air conditioner, wherein the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a main air inlet, a main air outlet, a fresh air inlet, a fresh air outlet, a main air duct connecting the main air inlet and the main air outlet, and a fresh air duct connecting the fresh air inlet and the fresh air outlet, a main air fan is provided in the main air duct, and a fresh air fan is provided in the fresh air duct, the method includes: when there is a refrigerant leakage in the indoor unit, controlling the outdoor unit to be in a shutdown state, and controlling the air outlet angle of the main air outlet to be toward the fresh air outlet, and controlling the main air fan to run in a first direction and controlling the fresh air fan to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in turn, wherein the second direction is a direction opposite to the first direction.

[0006] According to the refrigerant leakage control method of the air conditioner according to the embodiment of the present invention, when there is refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so as to efficiently discharge the refrigerant leaked into the main air duct to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0007] In some embodiments of the present invention, the air outlet angle is the minimum angle reached when the air outlet louver rotates downward.

[0008] In some embodiments of the present invention, the refrigerant leakage control method of the air conditioner further includes: acquiring the working state of the air conditioner; and determining whether there is a refrigerant leakage in the indoor unit according to the working state.

[0009] In some embodiments of the present invention, whether there is a refrigerant leakage in the indoor unit is determined according to the working state, including: when the working state is a standby state, obtaining the refrigerant concentration in the main air duct, and determining whether there is a refrigerant leakage in the indoor unit according to the refrigerant concentration; when the working state is an operating state, obtaining the operating parameters of the air conditioner, and determining whether there is a refrigerant leakage in the indoor unit according to the operating parameters.

[0010] In some embodiments of the present invention, determining whether there is a refrigerant leakage in the indoor unit according to the refrigerant concentration includes: when the refrigerant concentration is greater than a first preset concentration, determining that there is a refrigerant leakage in the indoor unit.

[0011] In some embodiments of the present invention, the operating parameters include indoor ambient temperature, indoor target temperature, indoor heat exchanger temperature, compressor temperature and whole machine current. Determining whether there is a refrigerant leakage in the indoor unit according to the operating parameters includes: obtaining a first temperature difference between the indoor ambient temperature and the indoor target temperature, and obtaining a second temperature difference between the indoor heat exchanger temperature and the indoor target temperature; when the first temperature difference is greater than a preset temperature and the second temperature difference is less than a preset temperature, controlling the compressor to operate at the current maximum allowable operating frequency, and after a first preset delay time, obtaining a current change in the whole machine current and a temperature change in the compressor temperature before and after the delay; when the current change is less than a preset current change and the temperature change is greater than a preset temperature change, determining that there is a refrigerant leakage in the indoor unit.

[0012] In some embodiments of the present invention, the operating parameters include an operating mode of the air conditioner, and the preset temperature is determined according to the operating mode.

[0013] In some embodiments of the present invention, the working mode includes a cooling mode and a heating mode, and the preset temperature corresponding to the cooling mode is lower than the preset temperature corresponding to the heating mode.

[0014] In some embodiments of the present invention, after controlling the main fan to run in a first direction and controlling the fresh air fan to run in a second direction, the refrigerant leakage control method of the air conditioner also includes: obtaining the refrigerant concentration in the main air duct; when the refrigerant concentration is less than a second preset concentration, controlling the main fan to be in a shutdown state, and after a delay of a second preset time, controlling the fresh air fan to be in a shutdown state.

[0015] In some embodiments of the present invention, when there is a refrigerant leak in the indoor unit, the refrigerant leakage control method of the air conditioner further includes: controlling the air conditioner to issue a refrigerant leakage reminder message.

[0016] 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, when executed by a processor, implements the refrigerant leakage control method of the air conditioner of any of the above-mentioned embodiments.

[0017] According to the computer-readable storage medium of an embodiment of the present invention, based on the aforementioned refrigerant leakage control method of the air conditioner, when there is refrigerant leakage in the indoor unit, the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so as to efficiently discharge the refrigerant leaked into the main air duct to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0018] To achieve the above-mentioned purpose, an embodiment of the 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, a refrigerant leakage control method for the air conditioner of any of the above-mentioned embodiments is implemented.

[0019] According to the air conditioner of an embodiment of the present invention, based on the aforementioned refrigerant leakage control method of the air conditioner, when there is refrigerant leakage in the indoor unit, the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so as to efficiently discharge the refrigerant leaked into the main air duct to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0020] To achieve the above-mentioned purpose, a fourth aspect of the present invention provides a refrigerant leakage control device for an air conditioner, wherein the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a main air inlet, a main air outlet, a fresh air inlet, a fresh air outlet, a main air duct connecting the main air inlet and the main air outlet, and a fresh air duct connecting the fresh air inlet and the fresh air outlet, a main fan is provided in the main air duct, and a fresh air fan is provided in the fresh air duct. The device includes: a control module, which is used to control the outdoor unit to be in a shutdown state when there is a refrigerant leakage in the indoor unit, and control the air outlet angle of the main air outlet to be toward the fresh air outlet, as well as control the main fan to operate in a first direction and control the fresh air fan to operate in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in turn, wherein the second direction is a direction opposite to the first direction.

[0021] According to the refrigerant leakage control device of the air conditioner according to the embodiment of the present invention, when there is refrigerant leakage in the indoor unit, the control module controls the air outlet angle of the main air outlet to be toward the fresh air outlet, controls the main fan to run in a first direction, and controls the fresh air fan to run in a second direction, thereby efficiently discharging the refrigerant leaked into the main air duct to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0022] 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

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 is a structural block diagram of an indoor unit according to an embodiment of the present invention.

[0025] Figure 2 1 is a flow chart of a refrigerant leakage control method for an air conditioner according to an embodiment of the present invention.

[0026] Figure 3 4 is a flow chart of a refrigerant leakage control method for an air conditioner according to another embodiment of the present invention.

[0027] Figure 4 4 is a flow chart of a refrigerant leakage control method for an air conditioner according to yet another embodiment of the present invention.

[0028] Figure 5 is a structural block diagram of an air conditioner according to an embodiment of the present invention.

[0029] Figure 6 4 is a structural block diagram of a refrigerant leakage control device for an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] The air conditioner and its refrigerant leakage 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.

[0032] In an embodiment of the present invention, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a main air inlet, a main air outlet, a fresh air inlet, a fresh air outlet, a main air duct connecting the main air inlet and the main air outlet, and a fresh air duct connecting the fresh air inlet and the fresh air outlet, a main fan is provided in the main air duct, and a fresh air fan is provided in the fresh air duct.

[0033] Among them, the main air inlet is used for indoor air intake, the main air outlet is used for indoor air outlet, the main air duct is used for indoor heat exchange, and a main fan is arranged in the main air duct. During the normal operation of the air conditioner, the main fan runs in a first direction (such as forward rotation). After the indoor air enters the indoor unit through the main air inlet, it exchanges heat in the main air duct of the indoor unit and then returns to the indoor from the main air outlet to achieve indoor heat exchange. The fresh air inlet is used for outdoor air intake, the fresh air outlet is used for indoor air outlet, and the fresh air duct is used to provide fresh air to the indoor. During the normal operation of the air conditioner, the fresh air fan runs in a first direction. After the outdoor air enters the indoor unit through the fresh air inlet, it passes through the fresh air duct of the indoor unit and then enters the indoor from the fresh air outlet to provide fresh air to the indoor.

[0034] For example, a cabinet air conditioner is used as an example. The cabinet air conditioner includes an outdoor unit and an indoor unit. Figure 1 As shown, the indoor unit includes a main air inlet 101, a main air outlet 102, a fresh air inlet 103, a fresh air outlet 104, a main air duct 105 connecting the main air inlet 101 and the main air outlet 102, and a fresh air duct 106 connecting the fresh air inlet 103 and the fresh air outlet 104. Two main air inlets 101 are provided, located on both sides of the indoor unit. An air outlet louver 111 is provided at the main air outlet 102 for adjusting the air outlet angle. A main air duct 105 is provided with a main fan 107, a heater 109, an indoor heat exchanger 110, a water tray 112, a heat exchanger connecting pipe 113 connected to the indoor heat exchanger 110, a refrigerant sensor 114 and other components. The fresh air duct 106 is provided with a fresh air fan 108 and other components.

[0035] Among them, the main fan 107 is used to circulate air and deliver cold air or hot air into the indoor space. The speed of the main fan 107 can be adjusted according to demand to control the indoor air flow and temperature distribution; the fresh air fan 108 is used to introduce outdoor air or filtered outdoor air into the room to maintain the quality of indoor air and ventilation effect; the heater 109 is used to realize the heating function; the indoor heat exchanger 110 is used to realize the heat exchange effect of the air conditioner; the air outlet louver 111 is used to guide and distribute the cold air or hot air of the indoor unit; the water tray 112 is used to process the condensed water generated by the indoor heat exchanger 110; the refrigerant sensor 114 is used to detect the refrigerant concentration in the main air duct 105. The refrigerant sensor 114 can be one or more, and the specific value is not limited here.

[0036] Figure 2 1 is a flow chart of a refrigerant leakage control method for an air conditioner according to an embodiment of the present invention.

[0037] like Figure 2 As shown, the refrigerant leakage control method of the air conditioner may include:

[0038] S11: When there is refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, wherein the second direction is opposite to the first direction.

[0039] Specifically, during the normal operation of the air conditioner, the indoor air enters the main air duct from the main air inlet, and under the drive of the main fan, after heat exchange through the indoor heat exchanger and heater, it returns to the room through the air outlet louvers and the main air outlet. The outdoor air enters the fresh air duct through the fresh air inlet, and under the drive of the fresh air fan, it enters the room through the fresh air outlet.

[0040] When a refrigerant leak occurs in the indoor unit of the air conditioner, such as an indoor heat exchanger or a refrigerant pipeline, the leaked refrigerant will exist in the main air duct. At this time, the outdoor unit is controlled to be in a shutdown state. Specifically, the compressor and the outdoor fan in the outdoor unit can be controlled to stop running, and the air outlet angle of the main air outlet can be controlled to face the fresh air outlet. Driven by the main fan and the fresh air fan, the refrigerant leaked in the main air duct can be quickly discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence to reduce the safety hazards caused by the refrigerant leakage. Among them, the main fan and the fresh air fan usually use the main motor and the fresh air motor as drivers respectively. By inputting electrical energy into the main motor and the fresh air motor, the main motor and the fresh air motor can respectively rotate the rotating blades or propellers of the main fan and the fresh air fan to achieve functions such as air flow, ventilation or circulation.

[0041] For example, Figure 1 As shown, when there is a refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, the circulation of the refrigerant is stopped, and the air outlet angle of the main air outlet 102 is controlled to be toward the fresh air outlet 104, and the main fan 107 is controlled to operate in a first direction (such as forward rotation) to blow the refrigerant leaked into the main air duct 105 to the fresh air outlet 104 through the main air outlet 102, and the fresh air fan 104 is controlled to operate in a second direction (such as reverse rotation) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharge it to the outside through the fresh air inlet 103. In this way, the refrigerant forms an efficient external circulation through the main air outlet 102, the fresh air outlet 104, the fresh air duct 106 and the fresh air inlet, thereby avoiding the leakage of refrigerant from being deposited indoors.

[0042] In this way, with the cooperation of the main fan and the fresh air fan, the refrigerant can be discharged to the outside as quickly as possible, and since the leaked refrigerant is directly discharged to the outside, the safety hazards caused by refrigerant leakage can be reduced to a certain extent.

[0043] It should be noted that the inclination angle of the air outlet louver 111 at the main air outlet 102 can be adjusted so that the air outlet angle of the main air outlet 102 is directed toward the fresh air outlet 104. For example, the air outlet angle can be the minimum angle reached when the air outlet louver 111 is rotated downward, so that as much refrigerant as possible can reach the fresh air outlet 104 from the main air outlet 102, thereby reducing the possibility of refrigerant being discharged into the room. Moreover, since the air outlet louver 111 is tilted downward, it can effectively avoid direct blowing on indoor personnel, thereby improving the comfort and safety of indoor personnel.

[0044] In the above embodiment, when there is a refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so that the refrigerant leaked into the main air duct is efficiently discharged to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0045] In some embodiments, the refrigerant leakage control method of the air conditioner further includes: acquiring the working state of the air conditioner; and determining whether there is a refrigerant leakage in the indoor unit according to the working state.

[0046] Specifically, usually, Figure 1As shown, a refrigerant sensor can be set below the indoor heat exchanger to detect the refrigerant concentration in the main air duct through the refrigerant sensor to determine whether there is refrigerant leakage in the indoor unit. Since the mass of refrigerant is heavier than air, setting the refrigerant sensor below can improve the detection accuracy. However, when the air conditioner is in standby mode, the refrigerant sensor has a higher detection accuracy, while when the air conditioner is in operation, the operation of the air conditioner will affect the detection accuracy of the refrigerant sensor. Therefore, different detection methods can be used to determine whether there is refrigerant leakage in the indoor unit based on the working state of the air conditioner, such as standby state and operation state, to improve the detection accuracy.

[0047] Furthermore, in some embodiments, determining whether there is a refrigerant leakage in the indoor unit is based on the working state, including: when the working state is a standby state, obtaining the refrigerant concentration in the main air duct, and determining whether there is a refrigerant leakage in the indoor unit based on the refrigerant concentration; when the working state is an operating state, obtaining the operating parameters of the air conditioner, and determining whether there is a refrigerant leakage in the indoor unit based on the operating parameters.

[0048] Specifically, when the air conditioner is powered on and in standby mode, the refrigerant concentration in the main air duct can be detected by the refrigerant sensor, and when the refrigerant concentration is greater than a first preset concentration, it is determined that there is a refrigerant leak in the indoor unit; when the air conditioner is in operation, since the detection accuracy of the refrigerant sensor is affected by the operation of the air conditioner, if the refrigerant concentration in the main air duct detected by the refrigerant sensor is continued to be used to determine whether there is a refrigerant leak in the indoor unit, there will be a problem of inaccurate detection. Therefore, at this time, it is possible to determine whether there is a refrigerant leak in the indoor unit based on the operating parameters of the air conditioner.

[0049] For example, Figure 1 As shown, when the air conditioner is in standby mode, the refrigerant concentration in the main air duct 105 is continuously obtained through the refrigerant sensor 114, and when the refrigerant concentration is greater than a first preset concentration, it is determined that there is a refrigerant leakage in the indoor unit. At this time, the outdoor unit is controlled to be in a shutdown state, the circulation of the refrigerant is stopped, and the air outlet angle of the main air outlet 102 is controlled to be toward the fresh air outlet 104, and the main fan 102 is controlled to run in a first direction (such as forward rotation) to blow the refrigerant leaked into the main air duct 105 to the fresh air outlet 104 through the main air outlet 102, and the fresh air fan 104 is controlled to run in a second direction (such as reverse) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharge it to the outside through the fresh air inlet 103.

[0050] When the air conditioner is in operation, the operating parameters of the air conditioner are obtained, and whether there is a refrigerant leakage in the indoor unit is determined based on the operating parameters, so that when there is a refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state to stop the circulation of the refrigerant, and the air outlet angle of the main air outlet 102 is controlled to be toward the fresh air outlet 104, and the main fan 102 is controlled to operate in a first direction (such as forward rotation) to blow the refrigerant leaked into the main air duct 105 to the fresh air outlet 104 through the main air outlet 102, and the fresh air fan 104 is controlled to operate in a second direction (such as reverse rotation) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharge it to the outside through the fresh air inlet 103.

[0051] In this way, a suitable detection method is selected according to different working states of the air conditioner to determine whether there is a refrigerant leak in the indoor unit, thereby improving the accuracy of the refrigerant leakage detection of the indoor unit.

[0052] In some embodiments, reference Figure 3 The operating parameters include indoor ambient temperature, indoor target temperature, indoor heat exchanger temperature, compressor temperature and whole machine current. Determine whether there is refrigerant leakage in the indoor unit based on the operating parameters, including:

[0053] S21: Acquire a first temperature difference between the indoor ambient temperature and the indoor target temperature, and acquire a second temperature difference between the indoor heat exchanger temperature and the indoor target temperature.

[0054] Specifically, the indoor target temperature is the target temperature pre-set in the air conditioner remote control, mobile terminal or voice device. The indoor ambient temperature can be acquired by the temperature sensor set in the corresponding room, and the indoor heat exchanger temperature can be acquired by the temperature sensor set in the middle of the indoor heat exchanger.

[0055] S22: When the first temperature difference is greater than the preset temperature and the second temperature difference is less than the preset temperature, the compressor is controlled to operate at the current maximum allowable operating frequency, and after a first preset delay time, the current change of the whole machine current and the temperature change of the compressor temperature before and after the delay are obtained.

[0056] Specifically, the compressor operates at the current maximum allowable frequency means that the compressor operates at the maximum allowable frequency corresponding to the temperature range of the current indoor heat exchanger temperature, and the compressor temperature may be the compressor surface temperature. The whole machine current refers to the whole machine current of the air conditioner.

[0057] When the first temperature difference is greater than the preset temperature and the second temperature difference is less than the preset temperature, it indicates that the indoor unit is suspected of refrigerant leakage. At this time, by controlling the compressor to operate according to the current maximum allowable operating frequency, the compressor is in high-frequency operation, which helps to identify and detect refrigerant leakage.

[0058] S23: When the current change is less than the preset current change and the temperature change is greater than the preset temperature change, it is determined that there is a refrigerant leak in the indoor unit.

[0059] Exemplarily, after the air conditioner is turned on and runs for a preset time, such as 5 minutes, the indoor ambient temperature T1 and the indoor heat exchanger temperature T2 are obtained, and the first temperature difference △T1=T1-Ts between the indoor ambient temperature T1 and the indoor target temperature Ts, and the second temperature difference △T2=T2-Ts between the indoor heat exchanger temperature T2 and the indoor target temperature Ts are obtained, and it is determined whether the first temperature difference △T1 is greater than the preset temperature T0. If not, the air conditioner is controlled to operate normally. If so, it is continued to be determined whether the second temperature difference △T2 is less than the preset temperature, and when the second temperature difference △T2 is less than the preset temperature, the compressor is controlled to operate at the current maximum allowed operating frequency. After a first preset delay time (such as 3 minutes), the whole machine current DL2 and the compressor temperature Tp2 of the air conditioner are obtained, and the current change △DL of the whole machine current before and after the delay is determined to be DL1-DL2 and the temperature change △Tp of the compressor temperature is determined to be Tp1-Tp2. When the current change △DL is less than the preset current change △DL0 and the temperature change △Tp is greater than the preset temperature change △Tp=0, it is determined that there is a refrigerant leak in the indoor unit. At this time, the outdoor unit is controlled to In the shutdown state, the air outlet angle of the main air outlet 102 is controlled to be toward the fresh air outlet 104, and the main fan 102 is controlled to run in a first direction (such as forward rotation) to blow the refrigerant leaked into the main air duct 105 to the fresh air outlet 104 through the main air outlet 102, and the fresh air fan 104 is controlled to run in a second direction (such as reverse rotation) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharged to the outside through the fresh air inlet 103.

[0060] In this way, when the air conditioner is in operation, by obtaining the operating parameters of the air conditioner and detecting refrigerant leakage according to the changes in the operating parameters, the refrigerant leakage detection can be more comprehensive and the detection accuracy can be improved. It should be noted that obtaining the operating parameters of the air conditioner after the air conditioner is turned on for a preset time can ensure that during the initial detection process, the operating parameters obtained are the parameters when the air conditioner is in a stable state, making the obtained operating parameters more accurate and reliable, and improving the accuracy of refrigerant leakage detection. Among them, the preset startup time can be any value between 3min and 10min, and the specific value can be adjusted according to actual needs.

[0061] In some embodiments, the operating parameters include an operating mode of the air conditioner, and the preset temperature is determined according to the operating mode.

[0062] Specifically, the working modes include a cooling mode and a heating mode, and the preset temperature corresponding to the cooling mode is lower than the preset temperature corresponding to the heating mode, so as to more accurately detect the refrigerant leakage.

[0063] In some embodiments, after controlling the main fan to run in a first direction and controlling the fresh air fan to run in a second direction, the refrigerant leakage control method of the air conditioner also includes: obtaining the refrigerant concentration in the main air duct; when the refrigerant concentration is less than a second preset concentration, controlling the main fan to be in a shutdown state, and after a delay of a second preset time, controlling the fresh air fan to be in a shutdown state.

[0064] It can be understood that in order to facilitate the determination of whether to discharge the refrigerant leaking in the main air duct to the outside, by setting a second preset concentration and comparing the difference between the refrigerant concentration detected in real time by the refrigerant sensor and the second preset concentration, when the refrigerant concentration is less than the second preset concentration, it means that the refrigerant leaking in the indoor unit is basically discharged to the outside. At this time, the main fan can be controlled to be in a shutdown state, and the fresh air fan can be controlled to be in a shutdown state with a delay, so as to discharge the refrigerant to the outside as much as possible. Among them, the second preset concentration is the difference between the first preset concentration and the preset margin, which can be set according to the actual situation, and the specific value is not limited here.

[0065] For example, Figure 1 As shown, when there is a refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet 102 is controlled to be toward the fresh air outlet 104, and the main fan 102 is controlled to run in a first direction (such as forward rotation) to blow the refrigerant leaked into the main air duct 105 to the fresh air outlet 104 through the main air outlet 102, and the fresh air fan 104 is controlled to run in a second direction (such as reverse rotation) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharge it to the outside through the fresh air inlet 103.

[0066] During the process of discharging the refrigerant to the outdoors, the refrigerant concentration in the main air duct 105 is continuously obtained through the refrigerant sensor 114. When the refrigerant concentration is less than the second preset concentration, it can be considered that the leaked refrigerant in the main air duct 105 has been reduced to a safe range. At this time, the main fan 102 is controlled to shut down, and the fresh air fan 104 will continue to run in the second direction (such as reverse) to pass the air containing the refrigerant at the fresh air outlet 104 through the fresh air duct 106 and discharge it to the outdoors through the fresh air inlet 103. After the operating time of the fresh air fan 104 reaches the second preset time, the fresh air fan 104 is controlled to be in a shutdown state to discharge the leaked refrigerant to the outdoors, thereby improving the safety of the air conditioner and indoor personnel.

[0067] It should be noted that after the delay of the second preset time, the main fan 102 and the fresh air fan 104 are in a shutdown state. At this time, the refrigerant sensor 114 continues to obtain the refrigerant concentration in the main air duct 105, so as to determine that there is a refrigerant leakage in the indoor unit when the refrigerant concentration in the main air duct 105 is greater than the first preset concentration, and discharge the leaked refrigerant to the outside through the main fan 102 and the fresh air fan 104.

[0068] In some embodiments, when there is a refrigerant leak in the indoor unit, the refrigerant leakage control method of the air conditioner further includes: controlling the air conditioner to issue a refrigerant leakage reminder message.

[0069] That is to say, when there is a refrigerant leak in the indoor unit, a refrigerant leak reminder message can be issued, such as: controlling the air conditioner display panel to display "refrigerant leak in the air conditioner", or displaying "refrigerant leak in the air conditioner" on the user's mobile terminal interface, or broadcasting "refrigerant leak in the air conditioner" through voice. In this way, the user is reminded of the refrigerant leak in the air conditioner in a timely manner so that the user can perform maintenance and inspection on the air conditioner.

[0070] As a specific example, Figure 4 As shown, the refrigerant leakage control method of the air conditioner includes:

[0071] S30: The air conditioner is powered on and the refrigerant sensor continues to operate to detect the refrigerant concentration in the main air duct.

[0072] S31: Determine whether the air conditioner is in standby mode, if so, enter S33, if not, enter S32.

[0073] S32: Determine whether the air conditioner is in operation, if so, proceed to S39.

[0074] S33: Determine whether the refrigerant concentration is greater than the first preset concentration. If so, proceed to S34; if not, proceed to S45.

[0075] S34: The outdoor unit is controlled to be in shutdown state and a refrigerant leakage reminder message is issued.

[0076] S35: Control the air outlet angle of the main air outlet toward the fresh air outlet, control the main fan to run in a first direction, and control the fresh air fan to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through an external circulation formed by the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence.

[0077] S36: The refrigerant sensor continuously obtains the refrigerant concentration in the main air duct. When the refrigerant concentration is less than a second preset concentration, the main fan is controlled to be in a shutdown state, and after a delay of a second preset time, the fresh air fan is controlled to be in a shutdown state.

[0078] S37: Determine whether the refrigerant concentration is greater than the first preset concentration. If so, proceed to S35; if not, proceed to S38.

[0079] S38: Control the main fan and fresh air fan to remain in shutdown state.

[0080] S39: After the air conditioner is turned on and runs for a preset time, the indoor ambient temperature T1 and the indoor heat exchanger temperature T2 are obtained.

[0081] S40: Determine whether the air conditioner is in cooling mode, if so, proceed to S41, if not, proceed to S46.

[0082] S41: Determine whether a first temperature difference ΔT1 between the indoor ambient temperature T1 and the indoor target temperature Ts is greater than a preset temperature T0. If so, proceed to S42; if not, proceed to S45.

[0083] S42: Determine whether the second temperature difference ΔT2 between the indoor heat exchanger temperature T2 and the indoor target temperature Ts is less than the preset temperature T0. If so, proceed to S43; if not, proceed to S45.

[0084] S43: Control the compressor to operate at the maximum allowable operating frequency, and after a first preset delay time, obtain a current change ΔDL of the whole machine current and a temperature change ΔTp of the compressor temperature before and after the delay.

[0085] S44: Determine whether the current change △DL is less than the preset current change △DL0, and whether the temperature change △Tp is greater than the preset temperature change △Tp0. If so, enter S34; if not, enter S45.

[0086] S45: The air conditioner operates normally.

[0087] S46: Determine whether the air conditioner is in heating mode, if so, proceed to S47.

[0088] S47: Determine whether the first temperature difference ΔT1 between the indoor ambient temperature T1 and the indoor target temperature Ts is greater than the preset temperature T1. If so, proceed to S48; if not, proceed to S45.

[0089] S48: Determine whether the second temperature difference ΔT2 between the indoor heat exchanger temperature T2 and the indoor target temperature Ts is less than the preset temperature T1. If so, proceed to S43; if not, proceed to S45.

[0090] In the above embodiment, when the air conditioner is in standby mode, the refrigerant leakage of the indoor unit is determined based on the refrigerant concentration in the main air duct detected by the refrigerant sensor, and when the air conditioner is in operation, the refrigerant leakage of the indoor unit is determined based on the operating parameters of the air conditioner, thereby improving the accuracy of refrigerant leakage detection; when there is a refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so that the refrigerant leaked into the main air duct is efficiently discharged to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0091] It should be noted that the specific numerical values ​​mentioned above are only used as examples to illustrate the implementation of the present invention in detail, and should not be understood as limiting the present invention. In other examples or implementations or embodiments, other numerical values ​​can be selected according to the present invention, and are not specifically limited here.

[0092] Corresponding to the above embodiments, an embodiment of the present invention further provides a computer-readable storage medium having a program stored thereon, and when the program is executed by a processor, it is a refrigerant leakage control method for an air conditioner in any of the above embodiments.

[0093] According to the computer-readable storage medium of an embodiment of the present invention, when there is a refrigerant leakage in the indoor unit, the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so that the refrigerant leaked into the main air duct is efficiently discharged to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by the refrigerant leakage to a certain extent.

[0094] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the refrigerant leakage control method of the 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 order to avoid redundancy.

[0095] Corresponding to the above embodiment, an embodiment of the present invention further provides an air conditioner.

[0096] Figure 5 FIG. 1 is a block diagram of an air conditioner according to an embodiment of the present invention. Figure 5 As shown, the air conditioner 300 includes: a memory 302, a processor 304, and a program 306 stored in the memory 302 and executable on the processor 304. When the processor 304 executes the program 306, the refrigerant leakage control method of the air conditioner in any of the above embodiments is implemented.

[0097] According to the air conditioner of the embodiment of the present invention, when there is a refrigerant leakage in the indoor unit, the main fan is controlled to operate in a first direction and the fresh air fan is controlled to operate in a second direction, so that the refrigerant leaked into the main air duct is efficiently discharged to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by the refrigerant leakage to a certain extent.

[0098] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the refrigerant leakage control method of the air conditioner is also applicable to the air conditioner 300 of the embodiment of the present invention, and will not be elaborated here in order to avoid redundancy.

[0099] Corresponding to the above-mentioned embodiment, an embodiment of the present invention further provides a refrigerant leakage control device for an air conditioner.

[0100] The air conditioner includes an indoor unit and an outdoor unit. Figure 1 As shown, the indoor unit 100 includes a main air inlet 101, a main air outlet 102, a fresh air inlet 103, a fresh air outlet 104, a main air duct 105 connecting the main air inlet 101 and the main air outlet 102, and a fresh air duct 106 connecting the fresh air inlet 103 and the fresh air outlet 104. A main fan 107 is provided in the main air duct 105, and a fresh air fan 108 is provided in the fresh air duct 106.

[0101] Figure 6 FIG. 1 is a block diagram of a refrigerant leakage control device for an air conditioner according to an embodiment of the present invention. Figure 6 As shown, the refrigerant leakage control device 500 of the air conditioner includes: a control module 502, which is used to control the outdoor unit to be in a shutdown state when there is a refrigerant leakage in the indoor unit, and control the air outlet angle of the main air outlet to be toward the fresh air outlet, and control the main fan to run in a first direction and control the fresh air fan to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, wherein the second direction is opposite to the first direction.

[0102] According to the refrigerant leakage control device of the air conditioner according to the embodiment of the present invention, when there is refrigerant leakage in the indoor unit, the control module controls the outdoor unit to be in a shutdown state, controls the air outlet angle of the main air outlet to be toward the fresh air outlet, controls the main fan to run in a first direction and controls the fresh air fan to run in a second direction, thereby efficiently discharging the refrigerant leaked into the main air duct to the outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, thereby reducing the safety hazards caused by refrigerant leakage to a certain extent.

[0103] It should be pointed out that the above-mentioned explanation of the embodiment and beneficial effects of the refrigerant leakage control method for the air conditioner is also applicable to the refrigerant leakage control device 500 for the air conditioner according to the embodiment of the present invention, and will not be elaborated here in order to avoid redundancy.

[0104] 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.

[0105] 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-mentioned embodiments, a plurality of 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.

[0106] 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.

[0107] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0108] In addition, the terms "first", "second", etc. used in the embodiments of the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in the present embodiment. Therefore, the features defined by the terms "first", "second", etc. in the embodiments of the present invention can explicitly or implicitly indicate that at least one of the features is included in the embodiment. In the description of the present invention, the meaning of the word "multiple" is at least two or two and above, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments. Relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0109] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed", "connected", "connected" and "fixed" etc. in the embodiments should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integrated connection. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements, or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situation.

[0110] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, electronic device, and computer-readable storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0111] 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 refrigerant leakage of an air conditioner, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises a main air inlet, a main air outlet, a fresh air inlet, a fresh air outlet, a main air duct connecting the main air inlet and the main air outlet, and a fresh air duct connecting the fresh air inlet and the fresh air outlet, a main fan is arranged in the main air duct, and a fresh air fan is arranged in the fresh air duct, and the method comprises: When there is refrigerant leakage in the indoor unit, the outdoor unit is controlled to be in a shutdown state, and the air outlet angle of the main air outlet is controlled to be toward the fresh air outlet, and the main fan is controlled to run in a first direction and the fresh air fan is controlled to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, wherein the second direction is opposite to the first direction.

2. The method according to claim 1, characterized in that: The air outlet angle is the minimum angle reached when the air outlet louvers rotate downward.

3. The method according to claim 1, characterized in that The method further comprises: Acquiring the working status of the air conditioner; Determine whether there is a refrigerant leak in the indoor unit according to the working status.

4. The method according to claim 3, characterized in that The determining whether there is a refrigerant leak in the indoor unit according to the working state includes: When the working state is the standby state, obtaining the refrigerant concentration in the main air duct, and determining whether there is a refrigerant leakage in the indoor unit according to the refrigerant concentration; When the working state is the running state, the running parameters of the air conditioner are obtained, and whether there is a refrigerant leakage in the indoor unit is determined according to the running parameters.

5. The method according to claim 4, characterized in that The determining whether there is a refrigerant leak in the indoor unit according to the refrigerant concentration includes: When the refrigerant concentration is greater than a first preset concentration, it is determined that there is a refrigerant leakage in the indoor unit.

6. The method according to claim 4, characterized in that The operating parameters include indoor ambient temperature, indoor target temperature, indoor heat exchanger temperature, compressor temperature and whole machine current, and determining whether there is a refrigerant leak in the indoor unit according to the operating parameters includes: Acquire a first temperature difference between the indoor ambient temperature and the indoor target temperature, and acquire a second temperature difference between the indoor heat exchanger temperature and the indoor target temperature; When the first temperature difference is greater than a preset temperature and the second temperature difference is less than the preset temperature, the compressor is controlled to operate at the current maximum allowable operating frequency, and after a delay of a first preset time, a current change of the whole machine current and a temperature change of the compressor temperature before and after the delay are obtained; When the current change is less than a preset current change and the temperature change is greater than a preset temperature change, it is determined that there is a refrigerant leak in the indoor unit.

7. The method according to claim 6, characterized in that The operating parameters include an operating mode of the air conditioner, and the preset temperature is determined according to the operating mode.

8. The method according to claim 7, characterized in that The working mode includes a cooling mode and a heating mode, and a preset temperature corresponding to the cooling mode is lower than a preset temperature corresponding to the heating mode.

9. The method according to any one of claims 1 to 8, characterized in that: After controlling the main fan to run in the first direction and controlling the fresh air fan to run in the second direction, the method further includes: Obtaining the refrigerant concentration in the main air duct; When the refrigerant concentration is less than a second preset concentration, the main fan is controlled to be in a shutdown state, and after a delay of a second preset time, the fresh air fan is controlled to be in a shutdown state.

10. The method according to any one of claims 1 to 8, characterized in that: When there is refrigerant leakage in the indoor unit, the method further includes: The air conditioner is controlled to issue a refrigerant leakage reminder message.

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

13. A refrigerant leakage control device for an air conditioner, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises a main air inlet, a main air outlet, a fresh air inlet, a fresh air outlet, a main air duct connecting the main air inlet and the main air outlet, and a fresh air duct connecting the fresh air inlet and the fresh air outlet, a main fan is arranged in the main air duct, and a fresh air fan is arranged in the fresh air duct, and the device comprises: A control module is used to control the outdoor unit to be in a shutdown state when there is a refrigerant leakage in the indoor unit, and control the air outlet angle of the main air outlet to be toward the fresh air outlet, and control the main fan to run in a first direction and control the fresh air fan to run in a second direction, so that the refrigerant leaked into the main air duct is discharged outdoors through the main air outlet, the fresh air outlet, the fresh air duct and the fresh air inlet in sequence, wherein the second direction is opposite to the first direction.

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