Air conditioner, refrigerant leakage control method thereof and computer readable storage medium

Abstract

The invention discloses an air conditioner, a refrigerant leakage control method of the air conditioner and a computer readable storage medium. One end of an indoor heat exchanger is connected with one end of an outdoor heat exchanger through a first control valve, and the other end of the indoor heat exchanger is connected with the other end of the outdoor heat exchanger through a second control valve and a compressor in sequence; a first node between the first control valve and one end of the outdoor heat exchanger is connected with the other end of the outdoor heat exchanger through a third control valve, and a second node between the second control valve and the compressor is connected with one end of the outdoor heat exchanger through a fourth control valve. Acquiring an operation mode of the air conditioner; and the first control valve, the second control valve, the third control valve and the fourth control valve are controlled according to the operation mode, and the compressor is controlled to be in the operation state, so that the refrigerant is recycled to the outdoor unit. According to the method, the refrigerant recovery time is shortened, and the refrigerant leakage amount and the safety risk caused by refrigerant leakage are reduced.

Description

Technical Field

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

[0002] Flammable refrigerants are increasingly used in air conditioners, but there may be safety risks caused by refrigerant leakage. In related technologies, the control methods after the leakage of flammable refrigerants include the following two methods:

[0003] 1. The refrigerant leakage is not limited. The indoor fan generates a circulating airflow to evenly distribute the indoor refrigerant concentration, so that the refrigerant concentration does not reach the combustion and explosion concentration threshold;

[0004] 2. After detecting refrigerant leakage, the indoor unit refrigerant is recovered through control to reduce the amount of refrigerant leakage.

[0005] Of the two control methods mentioned above, the second option is safer. However, when the air conditioner is in heating mode, before performing the refrigerant recovery operation, the air conditioner needs to be controlled to switch back to cooling mode, which generally takes half a minute. When the refrigerant leakage rate is very fast, the safety risk is still very high. Summary of the invention

[0006] 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 first purpose of the present invention is to propose a refrigerant leakage control method for an air conditioner, by controlling the on-off of a first control valve, a second control valve, a third control valve and a fourth control valve to construct a refrigerant recovery path corresponding to an operation mode, and cooperating with the operation of a compressor to perform a refrigerant recovery operation, thereby realizing the recovery of the refrigerant of the indoor unit without switching the operation mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage amount and the safety risks caused by the refrigerant leakage.

[0007] A second object of the present invention is to provide a computer-readable storage medium.

[0008] The third object of the present invention is to provide an air conditioner.

[0009] A fourth object of the present invention is to provide an air conditioner.

[0010] To achieve the above-mentioned purpose, a first embodiment of the present invention proposes a refrigerant leakage control method for an air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the indoor unit comprising an indoor heat exchanger, the outdoor unit comprising a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve, the refrigerant leakage control method for the air conditioner comprising: in the event of refrigerant leakage in the indoor unit, obtaining an operating mode of the air conditioner; controlling the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and controlling the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit.

[0011] According to a refrigerant leakage control method for an air conditioner according to an embodiment of the present invention, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve. The method first obtains an operating mode of the air conditioner when a refrigerant leakage occurs in the indoor unit, and controls the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and controls the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit. Therefore, the method constructs a refrigerant recovery path corresponding to the operating mode by controlling the on and off of the first control valve, the second control valve, the third control valve and the fourth control valve, and performs the refrigerant recovery operation in conjunction with the operation of the compressor, thereby realizing the recovery of the indoor unit refrigerant without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage and the safety risks brought by the refrigerant leakage.

[0012] In addition, the refrigerant leakage control method of the air conditioner according to the above embodiment of the present invention may also have the following additional technical features:

[0013] According to one embodiment of the present invention, the first control valve, the second control valve, the third control valve and the fourth control valve are controlled according to the operation mode, including: when the operation mode is the heating mode, the first control valve, the third control valve and the fourth control valve are controlled to be in an open state, and the second control valve is controlled to be in a closed state; when the operation mode is the cooling mode or the standby mode, the second control valve is controlled to be in an open state, and the first control valve, the third control valve and the fourth control valve are controlled to be in a closed state.

[0014] According to one embodiment of the present invention, the outdoor unit also includes an outdoor fan. When the refrigerant of the indoor unit is recovered to the outdoor unit, the refrigerant leakage control method of the air conditioner also includes: controlling the outdoor fan to operate at a first preset speed, wherein the first preset speed is greater than or equal to the maximum speed corresponding to when the air conditioner is operating in cooling mode or heating mode.

[0015] According to one embodiment of the present invention, the indoor unit also includes an indoor fan and a first air guide and / or a second air guide arranged corresponding to the indoor air outlet. In the event of refrigerant leakage in the indoor unit, the refrigerant leakage control method of the air conditioner also includes: controlling the indoor fan to operate at a second preset speed, wherein the second preset speed is greater than or equal to the maximum speed corresponding to when the air conditioner operates in cooling mode or heating mode; controlling the first air guide to open in a first direction, and the angle between the first air guide and the horizontal direction is a preset angle, and / or controlling the second air guide to swing within a preset angle range in the horizontal direction, wherein the first direction is opposite to the direction of gravity, and the preset angle is greater than zero.

[0016] According to one embodiment of the present invention, the first preset speed is the maximum allowable speed of the outdoor fan, and the second preset speed is the maximum allowable speed of the indoor fan; the preset angle is the maximum allowable angle of the first air guide, and the preset angle range is the maximum allowable angle range of the second air guide.

[0017] According to one embodiment of the present invention, when the refrigerant of the indoor unit is recovered to the outdoor unit, the refrigerant leakage control method of the air conditioner also includes: obtaining the refrigerant recovery time; when the refrigerant recovery time reaches a preset time, controlling the compressor and the outdoor fan to stop running, and when the preset conditions are met, controlling the indoor fan to stop running.

[0018] According to an embodiment of the present invention, the preset condition includes that the refrigerant content of the indoor unit is less than a first preset content or the refrigerant leakage duration reaches a preset duration.

[0019] According to one embodiment of the present invention, when controlling the compressor and the outdoor fan to stop running, the refrigerant leakage control method of the air conditioner also includes: when the operating mode is a heating mode, controlling the first control valve and the fourth control valve to be in a closed state; when the operating mode is a cooling mode or a standby mode, controlling the second control valve to be in a closed state.

[0020] According to one embodiment of the present invention, the refrigerant leakage control method of the air conditioner further includes: obtaining the refrigerant content of the indoor unit; when the refrigerant content is greater than a second preset content, determining that a refrigerant leakage occurs in the indoor unit, wherein the second preset content is greater than the first preset content.

[0021] To achieve the above objectives, a second aspect of the present invention proposes a computer-readable storage medium on which a refrigerant leakage control program for an air conditioner is stored. When the refrigerant leakage control program for the air conditioner is executed by a processor, the refrigerant leakage control method for the air conditioner is implemented.

[0022] According to the computer-readable storage medium of an embodiment of the present invention, when the refrigerant leakage control program of the air conditioner is executed by the processor, the refrigerant leakage control method of the air conditioner described above is implemented. Based on the refrigerant leakage control method of the air conditioner described above, a refrigerant recovery path corresponding to the operating mode is constructed by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, and the refrigerant recovery operation is performed in conjunction with the operation of the compressor, thereby realizing the recovery of the refrigerant of the indoor unit without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage amount and the safety risks brought by the refrigerant leakage.

[0023] To achieve the above-mentioned purpose, the third aspect of the embodiment of the present invention proposes an air conditioner, including a memory, a processor, and a refrigerant leakage control program of the air conditioner stored in the memory and executable on the processor. When the processor executes the refrigerant leakage control program of the air conditioner, the above-mentioned refrigerant leakage control method of the air conditioner is implemented.

[0024] According to the air conditioner of the embodiment of the present invention, when the processor executes the refrigerant leakage control program of the air conditioner, the above-mentioned refrigerant leakage control method of the air conditioner is implemented. Based on the above-mentioned refrigerant leakage control method of the air conditioner, a refrigerant recovery path corresponding to the operating mode is constructed by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, and the refrigerant recovery operation is performed in conjunction with the operation of the compressor, thereby realizing the recovery of the refrigerant of the indoor unit without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage amount and the safety risks brought by the refrigerant leakage.

[0025] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes an air conditioner, comprising: an indoor unit and an outdoor unit, the indoor unit comprising an indoor heat exchanger, the outdoor unit comprising a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve; a controller is used to obtain an operating mode of the air conditioner in the event of refrigerant leakage in the indoor unit, and to control the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and to control the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit.

[0026] According to the air conditioner of an embodiment of the present invention, the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor and an outdoor heat exchanger. One end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger. The other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor. The first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve. When refrigerant leakage occurs in the indoor unit, the controller obtains the operating mode of the air conditioner, controls the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and controls the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit. Therefore, the air conditioner constructs a refrigerant recovery path corresponding to the operating mode by controlling the on and off of the first control valve, the second control valve, the third control valve and the fourth control valve, and cooperates with the operation of the compressor to perform the refrigerant recovery operation, thereby realizing the recovery of the indoor unit refrigerant without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage and the safety risks brought by the refrigerant leakage.

[0027] 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

[0028] Figure 1 is a flow chart of a refrigerant leakage control method for an air conditioner according to an embodiment of the present invention;

[0029] Figure 2 is a system principle diagram of an air conditioner according to an embodiment of the present invention;

[0030] Figure 3 is a flow chart of a refrigerant leakage control method for an air conditioner according to a specific embodiment of the present invention;

[0031] Figure 4 is a block diagram of an air conditioner according to an embodiment of the present invention;

[0032] Figure 5 FIG. 1 is a block diagram of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] 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.

[0034] The following describes a refrigerant leakage control method for an air conditioner, a computer-readable storage medium, and an air conditioner provided in embodiments of the present invention with reference to the accompanying drawings.

[0035] Figure 1 4 is a flow chart of a refrigerant leakage control method for an air conditioner according to an embodiment of the present invention.

[0036] In one embodiment of the present invention, referring to Figure 2 As shown, the air conditioner includes an indoor unit 10 and an outdoor unit 20, the indoor unit 10 includes an indoor heat exchanger 11, and the outdoor unit 20 includes a compressor 21 and an outdoor heat exchanger 22, wherein one end of the indoor heat exchanger 11 is connected to one end of the outdoor heat exchanger 22 through a first control valve K1, and a first node A is provided between the first control valve K1 and one end of the outdoor heat exchanger 22, the other end of the indoor heat exchanger 11 is connected to the other end of the outdoor heat exchanger 22 through a second control valve K2 and the compressor 21 in turn, and a second node B is provided between the second control valve K2 and the compressor 21, the first node A is connected to the other end of the outdoor heat exchanger 22 through a third control valve K3, and the second node B is connected to one end of the outdoor heat exchanger 22 through a fourth control valve K4.

[0037] This embodiment achieves the expansion of the path through which the refrigerant can flow by setting the third control valve K3 and the fourth control valve K4, that is, when the third control valve K3 is opened, the refrigerant can flow between the first node A and the other end of the outdoor heat exchanger 22; when the fourth control valve K4 is opened, the refrigerant can flow between the second node B and one end of the outdoor heat exchanger 22.

[0038] When there is no refrigerant leakage in the air conditioner, the third control valve K3 and the fourth control valve K4 remain closed, and the first control valve K1 and the second control valve K2 remain open to ensure the normal operation of the air conditioner. It should be noted that when the control valve is in the closed state, the refrigerant cannot pass through the control valve; when the control valve is in the open state, the refrigerant can pass through the control valve.

[0039] Specifically, when the air conditioner is in cooling mode, the D end of the four-way valve 24 is connected to the C end, and the E end is connected to the S end. The indoor heat exchanger 11 acts as an evaporator to absorb heat from the refrigerant, and the outdoor heat exchanger 22 acts as a condenser to dissipate heat from the refrigerant. First, the high-pressure refrigerant compressed and discharged by the compressor 21 flows into the D end of the four-way valve 24, and flows out through the C end of the four-way valve 24 to enter the outdoor heat exchanger 22. After the heat dissipation and condensation process in the outdoor heat exchanger 22, the high-pressure refrigerant reaches the throttle valve 26, and the refrigerant is throttled, cooled and reduced in pressure by the throttle valve 26 to become a low-pressure refrigerant. The low-pressure refrigerant enters the indoor heat exchanger 11 through the first control valve K1 to absorb heat and evaporate, and then flows into the E end of the four-way valve 24 through the second control valve K2, and returns to the compressor 21 through the S end of the four-way valve 24 and the vapor-liquid separator 23 for compression, and the cycle is repeated. The vapor-liquid separator 23 can separate the gaseous refrigerant and the liquid refrigerant in the system. The vapor refrigerant returns to the compressor 21 to continue the compression cycle, and the liquid refrigerant remains in the vapor-liquid separator 23 to avoid liquid hammer in the compressor 21.

[0040] When the air conditioner is in cooling mode, the D end of the four-way valve 24 is connected to the E end, and the C end is connected to the S end. The outdoor heat exchanger 22 acts as an evaporator to absorb heat from the refrigerant, and the indoor heat exchanger 11 acts as a condenser to dissipate heat from the refrigerant. The high-pressure refrigerant compressed and discharged by the compressor 21 flows into the D end of the four-way valve 24, and flows out through the E end, and enters the indoor heat exchanger 11 through the second control valve K2. After the heat dissipation and condensation process in the indoor heat exchanger 11, the refrigerant passes through the first control valve K1 to the throttle valve 26, and the throttle valve 26 throttles the refrigerant to reduce temperature and pressure to become a low-pressure refrigerant. The low-pressure refrigerant flows into the outdoor heat exchanger 22 for heat absorption and evaporation, and then flows into the C end of the four-way valve 24, and returns to the compressor 21 through the S end of the four-way valve 24 and the vapor-liquid separator 23 for compression, and the cycle is repeated.

[0041] like Figure 1 As shown, the refrigerant leakage control method of the air conditioner according to the embodiment of the present invention includes:

[0042] S1, obtaining the operation mode of the air conditioner when a refrigerant leak occurs in the indoor unit;

[0043] S2, controlling the first control valve, the second control valve, the third control valve and the fourth control valve according to the operation mode, and controlling the compressor to be in an operation state to recover the refrigerant of the indoor unit to the outdoor unit.

[0044] Specifically, after the air conditioner is powered on, the refrigerant concentration in the indoor unit is monitored in real time through the refrigerant gas sensor. When the obtained refrigerant concentration reaches the preset alarm threshold, it is determined that the indoor unit has a refrigerant leak. In addition, when a refrigerant leak occurs in the indoor unit, the refrigerant pressure in the air conditioning system will decrease. Therefore, it is also possible to judge whether the indoor unit has a refrigerant leak based on the refrigerant pressure, or to judge the refrigerant leak based on the temperature, etc., which are not limited here.

[0045] When it is determined that a refrigerant leak occurs in the indoor unit, the operating mode of the air conditioner is obtained, and the operating mode may be a cooling mode, a heating mode, a dehumidification mode, a standby mode, etc. Then, the first control valve, the second control valve, the third control valve, and the fourth control valve are controlled according to the operating mode, so as to construct a refrigerant recovery loop according to the operating mode, and at the same time, the compressor operation is controlled to recover the refrigerant of the indoor unit to the outdoor unit. As a result, when a refrigerant leak occurs in the indoor unit, the method can directly control the refrigerant flow direction through the solenoid valve to realize indoor refrigerant recovery without stopping the machine to switch the four-way valve, which is time-saving, can effectively reduce the amount of indoor refrigerant leakage, and is safer.

[0046] During the refrigerant recovery process, the first control valve, the second control valve, the third control valve and the fourth control valve are controlled to ensure, on the one hand, the cutoff of the refrigerant inlet of the indoor heat exchanger to prevent the refrigerant recovered to the outdoor unit from flowing into the indoor unit again during the refrigerant recovery process; on the other hand, the cutoff of the compressor outlet must be avoided so that there is a certain space for the compressor outlet to be connected, to avoid the compressor outlet pressure being too high due to the compressor outlet being cut off or the space at the compressor outlet being too small during the refrigerant recovery process, thereby triggering the compressor to stop protection, so as to ensure the normal refrigerant recovery. The refrigerant inlet of the indoor heat exchanger is determined according to the operating mode of the air conditioner. Figure 2 For example, when the operation mode is heating mode, the refrigerant inlet of the indoor heat exchanger 11 is connected to one end of the second control valve K2; when the operation mode is cooling mode, the refrigerant inlet of the indoor heat exchanger 11 is connected to one end of the first control valve K1.

[0047] The following is an example of the refrigerant recovery control method. Figure 2As shown, when the air conditioner is in cooling mode, the first control valve K1 and the second control valve K2 are opened, the third control valve K3 and the fourth control valve K4 are closed, and the D end of the four-way valve 24 is connected to the C end, and the E end is connected to the S end. When it is determined that the indoor unit has a refrigerant leak, the first control valve K1 is controlled to close to close the refrigerant inlet of the indoor heat exchanger 11 to prevent the refrigerant from flowing into the indoor heat exchanger 11, and then the third control valve K3 and the fourth control valve K4 are kept closed. At this time, the refrigerant in the indoor heat exchanger 11 flows into the vapor-liquid separator 23 through the second controllable switch K2 and the E end and S end of the four-way valve 24, and then enters the compressor 24. After being compressed by the compressor 24, it flows into the outdoor heat exchanger 22 through the D end and the C end of the four-way valve 24, thereby realizing the recovery of the refrigerant of the indoor unit 10 to the outdoor unit 20. In addition, when the air conditioner is in cooling mode and refrigerant leakage occurs in the indoor unit, the third controllable valve K3 can also be controlled to open. At this time, part of the refrigerant that flows out through the D end and C end of the four-way valve 24 after being compressed by the compressor 24 can flow into the outdoor heat exchanger 22, and part can flow through the branch where the third control valve K3 is located. This can achieve the expansion of the outlet connection space of the compressor 24, avoid the triggering of the compressor protection during the refrigerant recovery process, and ensure the normal recovery of the refrigerant.

[0048] It should also be noted that during the refrigerant recovery process, the operating frequency of the compressor needs to be adjusted to ensure effective refrigerant recovery while avoiding excessive operating frequency and triggering protection. For example, the operating frequency of the compressor can be set to 40Hz or 50Hz.

[0049] In one embodiment of the present invention, the first control valve, the second control valve, the third control valve and the fourth control valve are controlled according to the operation mode, including: when the operation mode is the heating mode, the first control valve, the third control valve and the fourth control valve are controlled to be in an open state, and the second control valve is controlled to be in a closed state; when the operation mode is the cooling mode or the standby mode, the second control valve is controlled to be in an open state, and the first control valve, the third control valve and the fourth control valve are controlled to be in a closed state.

[0050] Specifically, Figure 2For example, when the air conditioner is in heating mode, the C end of the four-way valve 24 is connected to the S end, and the D end of the four-way valve 24 is connected to the E end. At this time, if it is determined that the indoor unit 10 has a refrigerant leak, the first control valve K1, the third control valve K3 and the fourth control valve K4 are controlled to open, and the second control valve K2 is controlled to close. The refrigerant flow route is as follows: the refrigerant in the indoor heat exchanger 11 flows into the C end of the four-way valve 24 through the first control valve K1 and the third control valve K3, and flows into the compressor 21 through the D end of the four-way valve 24 and the vapor-liquid separator 23. The refrigerant compressed and discharged by the compressor 21 flows into the branch where the fourth control valve 4 is located through the second node B. Under the action of the pressure difference, part of the refrigerant flowing through the fourth control valve 4 flows into the outdoor heat exchanger 22, and reaches the C end of the four-way valve 24 through the outdoor heat exchanger 22, and part of it flows back to the C end of the four-way valve 24 through the throttle valve 26, the first node A, and the third control valve K3, and reciprocates to recover the refrigerant of the indoor unit 10 to the outdoor unit 20. At the same time, through this cycle, it is possible to prevent the compressor protection shutdown caused by excessive pressure.

[0051] When the air conditioner is in cooling mode or standby mode, the E end of the four-way valve 24 is connected to the S end, and the D end of the four-way valve 24 is connected to the C end. At this time, if it is determined that the indoor unit has a refrigerant leak, the second control valve K2 is controlled to open, and the first control valve K1, the third control valve K3 and the fourth control valve K4 are controlled to close. The refrigerant recovery path is: the refrigerant of the indoor heat exchanger 11 flows into the E end of the four-way valve 24 through the second control valve K2, and flows into the compressor 21 through the S end of the four-way valve 24 and the vapor-liquid separator 23. The refrigerant compressed and discharged by the compressor 21 flows into the D end of the four-way valve 24, and flows into the condenser 3 and the throttle valve 26 through the C end of the four-way valve 24. Since the refrigerant storage space inside the outdoor heat exchanger 22 is larger than the refrigerant storage space of the indoor heat exchanger 11, the shutdown protection will not be triggered quickly, ensuring the normal operation of the refrigerant recovery operation. Specifically, the compressor running time can be set. For example, the refrigerant recovery time, i.e., the compressor running time, can be set to 30 seconds. Under the premise of ensuring that most of the refrigerant in the indoor unit is recovered to the outdoor unit 20, the triggering of the shutdown protection can be avoided.

[0052] In one embodiment of the present invention, the outdoor unit also includes an outdoor fan. When the refrigerant of the indoor unit is recovered to the outdoor unit, the refrigerant leakage control method of the air conditioner also includes: controlling the outdoor fan to operate at a first preset speed, wherein the first preset speed is greater than or equal to the maximum speed corresponding to when the air conditioner is operating in cooling mode or heating mode.

[0053] like Figure 2 As shown, the outdoor unit 20 also includes an outdoor fan 25, which can drive outdoor air to pass through the outdoor heat exchanger 22, thereby enhancing the ability of the refrigerant flowing through the outdoor heat exchanger 22 to absorb or release heat.

[0054] Specifically, during the refrigerant recovery process in the cooling, standby or heating mode, the inlet of the outdoor heat exchanger is connected to the outlet of the compressor, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor. Therefore, the outdoor heat exchanger is used to receive the high-pressure and high-temperature gas output by the compressor, and its essence is a condenser. Therefore, during the refrigerant recovery process, by controlling the operation of the outdoor fan, the heat dissipation and condensation effect of the outdoor heat exchanger can be improved, and the temperature and pressure reduction effect of the refrigerant flowing through the outdoor heat exchanger can be achieved. Therefore, when the refrigerant of the indoor unit is recovered to the outdoor unit, this embodiment controls the outdoor fan to operate at a maximum speed greater than or equal to the corresponding maximum speed when the cooling mode or heating mode is running, thereby improving the heat dissipation and pressure reduction effect of the refrigerant in the outdoor heat exchanger, and further ensuring the normal operation of the refrigerant recovery.

[0055] In one embodiment of the present invention, the indoor unit also includes an indoor fan and a first air guide and / or a second air guide arranged corresponding to the indoor air outlet. In the event of refrigerant leakage in the indoor unit, the refrigerant leakage control method of the air conditioner also includes: controlling the indoor fan to operate at a second preset speed, wherein the second preset speed is greater than or equal to the maximum speed corresponding to when the air conditioner operates in cooling mode or heating mode; controlling the first air guide to open in a first direction, and the angle between the first air guide and the horizontal direction is a preset angle, and / or controlling the second air guide to swing within a preset angle range in the horizontal direction, wherein the first direction is opposite to the direction of gravity, and the preset angle is greater than zero.

[0056] Reference Figure 2 As shown, the indoor fan 12 can drive the indoor air to pass through the indoor heat exchanger 11, so as to enhance the ability of the refrigerant flowing through the indoor heat exchanger 11 to absorb or release heat.

[0057] Specifically, taking the first air guide as the upper and lower air guide strips and the second air guide as the left and right air guide strips as an example, the first direction is the upward direction. When a refrigerant leaks in the indoor unit, the indoor fan is controlled to run at a second preset speed to accelerate the diffusion of the refrigerant in the indoor unit and avoid the risk of combustion and explosion caused by excessive local refrigerant concentration. At the same time, since the weight of the refrigerant is heavier than that of the air, the upper and lower air guide strips are controlled to open upward at a preset angle so that the refrigerant is blown upward through the upper and lower air guide strips and sinks under the weight of the refrigerant itself, so that the refrigerant is diffused more evenly.

[0058] In addition to the above control methods, when the indoor fan is running, the left and right air guide strips can be controlled to swing left and right within a preset angle range, so that the refrigerant is blown out evenly to the left and right, and the purpose of evenly diffusing the refrigerant can also be achieved. In addition, when the indoor fan is running, the upper and lower air guide strips and the left and right air guide strips can also be controlled at the same time, so that the refrigerant is blown out evenly upward and left and right, further improving the refrigerant diffusion effect and reducing the risk of combustion and explosion.

[0059] In one embodiment of the present invention, the first preset speed is the maximum allowable speed of the outdoor fan, and the second preset speed is the maximum allowable speed of the indoor fan; the preset angle is the maximum allowable angle of the first air guide, and the preset angle range is the maximum allowable angle range of the second air guide.

[0060] That is to say, when it is determined that a refrigerant leak has occurred in the indoor unit, the indoor fan is controlled to run at the maximum operating speed to achieve the best refrigerant diffusion effect. At the same time, the first air guide is controlled to be tilted upward to the maximum angle, so that the refrigerant sinks under the action of its own weight after being blown out, and the second air guide is controlled to swing within the maximum allowable angle range to diffuse the refrigerant more evenly, so as to minimize the risk of combustion and explosion caused by refrigerant accumulation.

[0061] In one embodiment of the present invention, when the refrigerant of the indoor unit is recovered to the outdoor unit, the refrigerant leakage control method of the air conditioner also includes: obtaining the refrigerant recovery time; when the refrigerant recovery time reaches a preset time, controlling the compressor and the outdoor fan to stop running, and when the preset conditions are met, controlling the indoor fan to stop running.

[0062] That is to say, when the compressor and the outdoor fan start to run, the timing is started as the refrigerant recovery time. When the timing reaches the preset time, such as 30 seconds, the compressor and the outdoor fan are controlled to stop running, and the refrigerant recovery operation ends. The preset time can be set according to the actual situation. Specifically, the setting of the preset time needs to ensure that most of the refrigerant in the indoor unit can be recovered to the outdoor unit. In addition, if the compressor runs for too long, it may also cause the negative pressure in the air-conditioning system to be too small, causing air to enter the air-conditioning system. Therefore, the setting of the preset time must also ensure that the negative pressure is not too small due to too long a time, so as to ensure the safety of operation.

[0063] After the refrigerant recovery operation is completed, the indoor fan is controlled to continue to run at the first preset speed to continue to blow the refrigerant in the indoor unit to ensure indoor safety. When the preset conditions are met, the indoor fan is controlled to stop running. The preset conditions may be that the actual running time of the indoor fan reaches the preset running time, or that the refrigerant concentration of the indoor unit drops to a safe concentration, or that an external shutdown command is received, etc., which are not limited here.

[0064] In one embodiment of the present invention, the preset condition includes that the refrigerant content of the indoor unit is less than a first preset content or the refrigerant leakage duration reaches a preset duration.

[0065] That is, after the compressor and the outdoor fan are controlled to stop running, that is, after the refrigerant recovery operation is completed, the indoor fan is kept running, and the refrigerant content of the indoor unit is obtained in real time. When it is determined that the refrigerant content of the indoor unit is less than the first preset content, it is considered that the refrigerant content of the indoor unit has dropped to a safe value, so the indoor fan is controlled to stop running. The refrigerant content can be the refrigerant concentration.

[0066] If the refrigerant content of the indoor unit does not drop below the first preset content after the compressor and the outdoor fan are stopped, but the refrigerant leakage duration reaches the preset duration, it is considered that the refrigerant leakage duration is too long, and the purpose of reducing the refrigerant content of the indoor unit to a safe content cannot be achieved by only running the indoor fan, so the indoor fan is controlled to stop running to avoid ineffective energy loss. In addition, the continuous operation of the indoor fan may cause user discomfort such as headaches, so when the refrigerant leakage duration reaches the preset duration, the indoor fan is controlled to stop running to ensure user comfort.

[0067] It should be noted that when it is determined that the indoor unit has a refrigerant leak, the air conditioner controller can send a fault reminder to the user by controlling the air conditioner buzzer to sound, the indoor unit light panel to display a fault code, etc. In addition, the fault can be sent to the user terminal through the intelligent module to remind the user to open the window for ventilation, or the doors and windows can be opened automatically to improve the air circulation in the space where the indoor unit is located to avoid the risk of explosion caused by excessive refrigerant concentration.

[0068] After determining that the preset conditions are met and controlling the indoor fan to stop running, the air conditioner should be fault locked. On the one hand, the air conditioner is controlled to continue to keep the buzzer sounding, display the fault code and other alarm states to remind the user to inspect the air conditioner. On the other hand, it can prevent the air conditioner from operating incorrectly and causing further leakage of refrigerant.

[0069] In one embodiment of the present invention, when controlling the compressor and the outdoor fan to stop running, the refrigerant leakage control method of the air conditioner also includes: when the operating mode is a heating mode, controlling the first control valve and the fourth control valve to be in a closed state; when the operating mode is a cooling mode or a standby mode, controlling the second control valve to be in a closed state.

[0070] That is to say, when the compressor and the outdoor fan are controlled to stop running, the refrigerant recovery operation ends, and the refrigerant outlet of the indoor heat exchanger is closed to avoid refrigerant backflow and ensure the refrigerant recovery effect. Specifically, when the operation mode is the heating mode, the refrigerant recovery is performed by controlling the first control valve, the third control valve and the fourth control valve to open, and controlling the second control valve to close. At the end of the refrigerant recovery operation, since the first control valve and the fourth control valve are arranged in series, in order to improve the anti-backflow effect, the first control valve and the fourth control valve are controlled to close to close the refrigerant inlet of the indoor heat exchanger. When the operation mode is the cooling mode or the standby mode, the refrigerant recovery is performed by controlling the second control valve to open, and controlling the first control valve, the third control valve and the fourth control valve to close. Then, at the end of the refrigerant recovery operation, the second control valve is controlled to close, so that the refrigerant outlet of the indoor heat exchanger can be closed.

[0071] In one embodiment of the present invention, the refrigerant leakage control method of the air conditioner further includes: obtaining the refrigerant content of the indoor unit; when the refrigerant content is greater than a second preset content, determining that a refrigerant leakage occurs in the indoor unit, wherein the second preset content is greater than the first preset content.

[0072] Specifically, taking the refrigerant content as the refrigerant concentration as an example, the second preset content is the second preset concentration. After the air conditioner is powered on, the refrigerant gas sensor detects the refrigerant concentration of the indoor unit at a preset time interval. When the refrigerant concentration is detected to be greater than the second preset concentration, it is determined that a refrigerant leak occurs in the indoor unit. At this time, the air conditioner controller can control the buzzer of the air conditioner to sound, the light board of the indoor unit to display the fault code, send a fault reminder to the user terminal, etc., to remind the user of the refrigerant leak. At the same time, it can also realize linkage with doors and windows based on smart home control. For example, when it is determined that a refrigerant leak occurs in the indoor unit, the doors and windows of the room where the indoor unit is located are controlled to open to enhance indoor air circulation. At the same time, the control valve is controlled based on the operating mode of the air conditioner, and the compressor is started to perform the refrigerant recovery operation.

[0073] In addition, the first preset concentration used to determine whether the indoor fan stops running is less than the second preset concentration in this embodiment, which can prevent the refrigerant concentration of the indoor unit from rising again to reach the second preset concentration after the indoor fan stops running, thereby preventing the refrigerant recovery operation from being triggered again. In addition, judging whether there is a refrigerant leak based on the refrigerant content has a low risk of false alarm and is more accurate and reliable.

[0074] As a specific embodiment of the present application, the first air guide member is an upper and lower air guide strip, and the second air guide member is a left and right air guide strip. The refrigerant leakage control method of the air conditioner is as follows: Figure 3 As shown, the following steps may be included:

[0075] S301, obtaining the refrigerant content of the indoor unit.

[0076] S302, determining whether the refrigerant content is greater than a second preset content. If so, executing step S303; if not, executing step S301.

[0077] S303, controlling the indoor fan to run at the highest speed, and controlling the upper and lower air guide strips to move upward to the maximum angle, and the left and right air guide strips to swing left and right within a preset angle range.

[0078] S304, obtaining the operation mode of the air conditioner. When the operation mode is the heating mode, execute step S305; when the operation mode is the cooling mode or the standby mode, execute step S312.

[0079] S305, control the first control valve, the third control valve and the fourth control valve to be in an open state, the second control valve to be in a closed state, and control the compressor to be in an operating state, and the outdoor fan to operate at a maximum speed.

[0080] S306, obtaining refrigerant recovery time;

[0081] S307, determining whether the refrigerant recovery time reaches the preset time. If yes, executing step S308; if no, executing step S305.

[0082] S308, controlling the compressor and the outdoor fan to stop running, and controlling the first control valve and the fourth control valve to be in a closed state.

[0083] S309, determining whether the refrigerant content of the indoor unit is less than a first preset content, or whether the refrigerant leakage duration reaches a preset duration. If yes, execute step S310; if not, execute step S311.

[0084] S310, controlling the indoor fan to stop running and controlling the air conditioner alarm to lock.

[0085] S311, control the indoor fan to continue running, and execute step S309.

[0086] S312, control the second control valve to be in an open state, the first control valve, the third control valve and the fourth control valve to be in a closed state, and control the compressor to be in an operating state, and the outdoor fan to operate at a maximum speed.

[0087] S313, obtaining refrigerant recovery time;

[0088] S314, determining whether the refrigerant recovery time reaches the preset time. If yes, executing step S315; if no, executing step S312.

[0089] S315, control the compressor and the outdoor fan to stop running, and control the second control valve to be in a closed state. Execute step S309.

[0090] In summary, according to the refrigerant leakage control method of the air conditioner according to the embodiment of the present invention, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve. In the case of refrigerant leakage in the indoor unit, the method obtains the operating mode of the air conditioner, controls the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and controls the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit. Therefore, the method constructs a refrigerant recovery path corresponding to the operating mode by controlling the on and off of the first control valve, the second control valve, the third control valve and the fourth control valve, and performs the refrigerant recovery operation in conjunction with the operation of the compressor, thereby realizing the recovery of the indoor unit refrigerant without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage and the safety risks brought by the refrigerant leakage.

[0091] Corresponding to the above embodiment, the present invention also proposes a computer-readable storage medium.

[0092] The computer-readable storage medium of the embodiment of the present invention stores a refrigerant leakage control program for an air conditioner, and when the refrigerant leakage control program for the air conditioner is executed by a processor, the refrigerant leakage control method for the air conditioner described above is implemented.

[0093] According to the computer-readable storage medium of an embodiment of the present invention, when the refrigerant leakage control program of the air conditioner is executed by the processor, the refrigerant leakage control method of the air conditioner described above is implemented. Based on the refrigerant leakage control method of the air conditioner described above, a refrigerant recovery path corresponding to the operating mode is constructed by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, and the refrigerant recovery operation is performed in conjunction with the operation of the compressor, thereby realizing the recovery of the refrigerant of the indoor unit without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage amount and the safety risks brought by the refrigerant leakage.

[0094] Corresponding to the above embodiment, the present invention also proposes an air conditioner.

[0095] like Figure 4As shown, the air conditioner 100 of the embodiment of the present invention includes a memory 110, a processor 120, and a refrigerant leakage control program of the air conditioner stored in the memory 110 and executable on the processor 120. When the processor 120 executes the refrigerant leakage control program of the air conditioner, the above-mentioned refrigerant leakage control method of the air conditioner is implemented.

[0096] According to the air conditioner of the embodiment of the present invention, when the processor executes the refrigerant leakage control program of the air conditioner, the above-mentioned refrigerant leakage control method of the air conditioner is implemented. Based on the above-mentioned refrigerant leakage control method of the air conditioner, a refrigerant recovery path corresponding to the operating mode is constructed by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, and the refrigerant recovery operation is performed in conjunction with the operation of the compressor, thereby realizing the recovery of the refrigerant of the indoor unit without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage amount and the safety risks brought by the refrigerant leakage.

[0097] Corresponding to the above embodiment, the present invention also proposes an air conditioner.

[0098] like Figure 5 As shown, the air conditioner according to the embodiment of the present invention includes: an indoor unit 10 , an outdoor unit 20 and a controller 30 .

[0099] Among them, combined Figure 2 and Figure 5 The indoor unit 10 includes an indoor heat exchanger 11, and the outdoor unit 20 includes a compressor 21 and an outdoor heat exchanger 22. One end of the indoor heat exchanger 11 is connected to one end of the outdoor heat exchanger 22 through a first control valve K1, and a first node A is provided between the first control valve K1 and one end of the outdoor heat exchanger 22. The other end of the indoor heat exchanger 11 is connected to the other end of the outdoor heat exchanger 22 through a second control valve K2 and a compressor 21 in turn, and a second node B is provided between the second control valve K2 and the compressor 21. The first node A is connected to the other end of the outdoor heat exchanger 22 through a third control valve K3, and the second node B is connected to one end of the outdoor heat exchanger 22 through a fourth control valve K4. The controller 30 is used to obtain the operation mode of the air conditioner when a refrigerant leak occurs in the indoor unit 10, and to control the first control valve K1, the second control valve K2, the third control valve K3, and the fourth control valve K4 according to the operation mode, and to control the compressor 21 to be in operation so as to recover the refrigerant of the indoor unit 10 to the outdoor unit 20.

[0100] According to the air conditioner of an embodiment of the present invention, the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor and an outdoor heat exchanger. One end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger. The other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor. The first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve. When refrigerant leakage occurs in the indoor unit, the controller obtains the operating mode of the air conditioner, controls the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and controls the compressor to be in an operating state to recover the refrigerant of the indoor unit to the outdoor unit. Therefore, the air conditioner constructs a refrigerant recovery path corresponding to the operating mode by controlling the on and off of the first control valve, the second control valve, the third control valve and the fourth control valve, and cooperates with the operation of the compressor to perform the refrigerant recovery operation, thereby realizing the recovery of the indoor unit refrigerant without switching the operating mode, reducing the refrigerant recovery time, and further reducing the refrigerant leakage and the safety risks brought by the refrigerant leakage.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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 an indoor heat exchanger, the outdoor unit comprises a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in sequence, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve, and the method comprises: In the event of a refrigerant leak in the indoor unit, obtaining an operating mode of the air conditioner; The first control valve, the second control valve, the third control valve and the fourth control valve are controlled according to the operation mode, and the compressor is controlled to be in an operation state to recover the refrigerant of the indoor unit to the outdoor unit.

2. The method according to claim 1, characterized in that The controlling the first control valve, the second control valve, the third control valve and the fourth control valve according to the operation mode includes: When the operation mode is a heating mode, controlling the first control valve, the third control valve and the fourth control valve to be in an open state, and controlling the second control valve to be in a closed state; When the operation mode is a cooling mode or a standby mode, the second control valve is controlled to be in an open state, and the first control valve, the third control valve and the fourth control valve are controlled to be in a closed state.

3. The method according to claim 2, characterized in that The outdoor unit further includes an outdoor fan. When the refrigerant of the indoor unit is recovered to the outdoor unit, the method further includes: The outdoor fan is controlled to operate at a first preset speed, wherein the first preset speed is greater than or equal to a maximum speed corresponding to when the air conditioner operates in a cooling mode or a heating mode.

4. The method according to claim 3, characterized in that: The indoor unit further includes an indoor fan and a first air guide and / or a second air guide arranged corresponding to the indoor air outlet. In the event of a refrigerant leak in the indoor unit, the method further includes: Controlling the indoor fan to operate at a second preset speed, wherein the second preset speed is greater than or equal to a maximum speed corresponding to when the air conditioner operates in a cooling mode or a heating mode; The first air guide is controlled to open along a first direction with an angle between the first air guide and the horizontal direction being a preset angle, and / or the second air guide is controlled to swing within a preset angle range in the horizontal direction, wherein the first direction is opposite to the direction of gravity and the preset angle is greater than zero.

5. The method according to claim 4, characterized in that The first preset speed is the maximum allowable speed of the outdoor fan, and the second preset speed is the maximum allowable speed of the indoor fan; the preset angle is the maximum allowable angle of the first air guide, and the preset angle range is the maximum allowable angle range of the second air guide.

6. The method according to claim 4, characterized in that When the refrigerant of the indoor unit is recovered to the outdoor unit, the method further includes: Get refrigerant recovery time; When the refrigerant recovery time reaches a preset time, the compressor and the outdoor fan are controlled to stop running, and when a preset condition is met, the indoor fan is controlled to stop running.

7. The method according to claim 6, characterized in that The preset condition includes that the refrigerant content of the indoor unit is less than a first preset content or the refrigerant leakage duration reaches a preset duration.

8. The method according to claim 6, characterized in that When controlling the compressor and the outdoor fan to stop running, the method further includes: When the operation mode is a heating mode, controlling the first control valve and the fourth control valve to be in a closed state; When the operation mode is a cooling mode or a standby mode, the second control valve is controlled to be in a closed state.

9. The method according to claim 7, characterized in that: The method further comprises: Obtaining the refrigerant content of the indoor unit; When the refrigerant content is greater than a second preset content, it is determined that a refrigerant leakage occurs in the indoor unit, wherein the second preset content is greater than the first preset content.

10. A computer-readable storage medium, characterized in that: A refrigerant leakage control program of the air conditioner is stored thereon, and when the refrigerant leakage control program of the air conditioner is executed by the processor, a refrigerant leakage control method of the air conditioner according to any one of claims 1-9 is implemented.

11. An air conditioner, characterized in that: The invention comprises a memory, a processor and a refrigerant leakage control program of an air conditioner which is stored in the memory and can be run on the processor. When the processor executes the refrigerant leakage control program of the air conditioner, a refrigerant leakage control method of the air conditioner according to any one of claims 1 to 9 is implemented.

12. An air conditioner, characterized in that: include: An indoor unit and an outdoor unit, wherein the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor and an outdoor heat exchanger, wherein one end of the indoor heat exchanger is connected to one end of the outdoor heat exchanger through a first control valve, and a first node is provided between the first control valve and one end of the outdoor heat exchanger, and the other end of the indoor heat exchanger is connected to the other end of the outdoor heat exchanger through a second control valve and a compressor in turn, and a second node is provided between the second control valve and the compressor, the first node is connected to the other end of the outdoor heat exchanger through a third control valve, and the second node is connected to one end of the outdoor heat exchanger through a fourth control valve; A controller is used to obtain an operating mode of the air conditioner when a refrigerant leak occurs in the indoor unit, and to control the first control valve, the second control valve, the third control valve and the fourth control valve according to the operating mode, and to control the compressor to be in an operating state so as to recover the refrigerant of the indoor unit to the outdoor unit.

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