Air conditioner, control method and device thereof, storage medium and computer program product

Abstract

The application discloses an air conditioner and a control method, device, storage medium and computer program product thereof. The method comprises the following steps: acquiring a refrigerant leakage signal of the air conditioner; acquiring a working current of a refrigerant leakage treatment device under the condition that the refrigerant leakage treatment device is working; determining a type of the refrigerant leakage signal; and controlling at least one of the following: whether the outdoor unit is powered off, the opening and closing when not powered off and the operation parameter when turned on, whether the indoor unit is powered off, the opening and closing when not powered off and the operation parameter when turned on, and whether the refrigerant leakage treatment device is powered off, the opening and closing when not powered off and the operation parameter when turned on, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, to execute a preset explosion-proof measure. According to the scheme, the refrigerant leakage treatment device is arranged on the outdoor side of the air conditioner, and the active explosion-proof measure is taken under the condition that the refrigerant leakage of the air conditioner is determined, so that the safety is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, in particular to a refrigerant leakage processing method and device of a photovoltaic direct-drive R290 air conditioner, the air conditioner, a storage medium and a computer program product. BACKGROUND

[0002] With the gradual influence of the Kigali Amendment on China, refrigerants with high greenhouse effect potential values such as global warming potential (GWP) such as R134a, R32 and the like will be gradually restricted, and natural working medium refrigerants with low GWP begin to gradually rise and go to the market. Compared with R32, the natural working medium represented by R290 is more flammable and explosive, and therefore, when the refrigerant leaks, the safety problem of how to prevent fire and explosion is more prominent.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The purpose of the present application is to provide a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, to solve the problem of how to prevent fire and explosion when the refrigerant of the air conditioner adopts the natural working medium represented by R290 when the refrigerant leaks, to achieve the effect of setting a refrigerant leakage processing device on the outdoor side of the air conditioner, and taking proactive explosion prevention measures when it is determined that the refrigerant of the air conditioner leaks, and improving safety.

[0005] The present application provides a control method of an air conditioner, the air conditioner having an outdoor part and an indoor part, the outdoor part including an outdoor unit and a refrigerant leakage processing device, and the indoor part including an indoor unit; the control method of the air conditioner comprising: acquiring a refrigerant leakage signal of the air conditioner; and acquiring a working current of the refrigerant leakage processing device in the case that the refrigerant leakage processing device works; determining the type of the refrigerant leakage signal; according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage processing device, controlling at least one of the following to execute a preset explosion prevention measure: whether the outdoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, and whether the refrigerant leakage processing device is powered off, the start-stop when not powered off and the operating parameter when turned on.

[0006] In some embodiments, the indoor unit further has a drain pipe in communication with a drain outlet of a drain pan of the indoor unit; the refrigerant leakage processing device comprises a power supply module and an exhaust module; the exhaust module comprises a three-way switch and an air pump; the power supply module is configured to supply power to the three-way switch and the air pump; the three-way switch has a first end, a second end and a third end; the first end of the three-way switch is in communication with the air pump; the second end of the three-way switch is in communication with the drain pipe; the third end of the three-way switch is in communication with the outside atmosphere; when the three-way switch is turned on, the air pump is in communication with the drain pipe; when the three-way switch is turned off, the drain pipe is in communication with the outside atmosphere.

[0007] In some embodiments, the type of the refrigerant leakage signal comprises any one of a preset first leakage type, a preset second leakage type and a preset third leakage type; determining the type of the refrigerant leakage signal comprises: if it is determined that the air conditioner is running in any one of a cooling mode of the air conditioner and a dehumidification mode of the air conditioner, determining that the type of the refrigerant leakage signal is the preset first leakage type; if it is determined that the air conditioner is running in any one of a heating mode of the air conditioner, a supply mode of the air conditioner and a drying mode of the air conditioner, determining that the type of the refrigerant leakage signal is the preset second leakage type; if it is determined that the air conditioner is defrosting in the heating mode of the air conditioner, and if it is determined that the discharge temperature of a compressor in the air conditioner is greater than a preset discharge temperature threshold, determining that the type of the refrigerant leakage signal is the preset second leakage type; if it is determined that the air conditioner is in a situation that the air conditioner is in a fault shutdown or the indoor unit has been started but the compressor in the air conditioner has not been started, determining that the type of the refrigerant leakage signal is the preset third leakage type; if it is determined that the air conditioner is defrosting in the heating mode of the air conditioner, and if it is determined that the discharge temperature of the compressor in the air conditioner is less than or equal to the preset discharge temperature threshold, determining that the type of the refrigerant leakage signal is the preset third leakage type.

[0008] In some embodiments, the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device, and an outdoor fan; the indoor unit has an indoor fan, and a damper; according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage treatment device, at least one of the following is controlled to perform a preset explosion prevention measure: whether the outdoor unit is powered off, the on-off when not powered off, and the operating parameter when turned on, whether the indoor unit is powered off, the on-off when not powered off, and the operating parameter when turned on, and whether the refrigerant leakage treatment device is powered off, the on-off when not powered off, and the operating parameter when turned on, including: in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, the compressor is controlled to remain turned on, and the frequency of the compressor is controlled to decrease at a preset first rate to a preset frequency, then the compressor is controlled to stop and be powered off; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, the opening degree of the throttling device is controlled to remain at a current value during the frequency of the compressor is controlled to decrease at the preset first rate; after the compressor is controlled to stop and be powered off, the opening degree of the throttling device is controlled to decrease at a preset second rate until the opening degree of the throttling device is 0; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, the on-off of the indoor fan and the rotating speed when turned on are controlled according to the type of the refrigerant leakage signal, and the on-off of the damper is controlled; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, the on-off of the outdoor fan and the rotating speed when turned on are controlled according to the type of the refrigerant leakage signal; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, whether the refrigerant leakage treatment device is powered off, the on-off when not powered off, and the operating parameter when turned on are controlled according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage treatment device in the preset first leakage type.

[0009] In some embodiments, wherein, in the case of determining that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, the start and stop of the indoor fan and the rotating speed of the indoor fan at the start are controlled, and the start and stop of the air deflector are controlled, including: in the case of determining that the type of the refrigerant leakage signal is the preset first leakage type, while the frequency of the compressor is controlled to decrease at the preset first rate, the rotating speed of the indoor fan is controlled to start to decrease, and the air deflector is controlled to start to close; and after the compressor is controlled to stop and power off, the indoor fan is controlled to stop and power off; in the case of determining that the type of the refrigerant leakage signal is the preset second leakage type, while the frequency of the compressor is controlled to decrease at the preset first rate, the rotating speed of the indoor fan is controlled to start to maintain the current value; while the compressor is controlled to stop and power off, the air deflector is controlled to start to close; and after the compressor is controlled to stop and power off, the indoor fan is controlled to stop and power off;

[0010] and / or, in the case of determining that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, the start and stop of the outdoor fan and the rotating speed of the outdoor fan at the start are controlled, and whether the refrigerant leakage processing device is powered off, the start and stop of the refrigerant leakage processing device when not powered off and the operating parameters of the refrigerant leakage processing device at the start are controlled, including: in the case of determining that the type of the refrigerant leakage signal is the preset first leakage type, during the period of controlling the frequency of the compressor to decrease at the preset first rate, the rotating speed of the outdoor fan is controlled to maintain the current value; while the opening degree of the throttling device is controlled to be small, the rotating speed of the outdoor fan is controlled to rise until the rotating speed of the outdoor fan reaches the preset highest fan rotating speed, the rotating speed of the outdoor fan is controlled to maintain the current value; and when the opening degree of the throttling device is controlled to be small to 0, the outdoor fan is controlled to stop and power off; in the case of determining that the type of the refrigerant leakage signal is the preset second leakage type, during the period of controlling the frequency of the compressor to decrease at the preset first rate, the rotating speed of the outdoor fan is controlled to start to decrease by the first set proportion on the basis of the current value of the rotating speed of the outdoor fan, and then maintain the new current value; while the opening degree of the throttling device is controlled to be small, the rotating speed of the outdoor fan is controlled to rise until the rotating speed of the outdoor fan continues to decrease to the preset lowest fan rotating speed, the rotating speed of the outdoor fan is controlled to maintain the current value; and when the opening degree of the throttling device is controlled to be small to 0, the outdoor fan is controlled to stop and power off; wherein, in the case of determining that the type of the refrigerant leakage signal is the preset second leakage type, in the heating mode of the air conditioner and in the case of the electric auxiliary heating device of the air conditioner being turned on, the electric auxiliary heating device is controlled to be turned off and powered off;

[0011] and / or, in the case where the refrigerant leakage treatment device comprises a three-way switch and an air pump, the operating parameters of the refrigerant leakage treatment device comprise: a rotating speed of the air pump; a working current of the refrigerant leakage treatment device, comprising: a working current of the air pump; in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, and in the case where the preset first leakage type is combined with the working current of the refrigerant leakage treatment device, the power-off of the refrigerant leakage treatment device, the on-off when not powered off and the operating parameters when powered on are controlled, comprising: while the frequency of the compressor is controlled to decrease at a preset first rate, the three-way switch is controlled to be opened, and the air pump is controlled to be opened; after the air pump is opened, the rotating speed of the air pump is controlled to rotate at a preset highest pump rotating speed for a first preset time length, then the rotating speed of the air pump is controlled to decrease to a second set proportion of the preset highest pump rotating speed for a second preset time length, and then the rotating speed of the air pump is controlled to increase to the preset highest pump rotating speed for a third preset time length; after that, in the case where the air pump rotates at the preset highest pump rotating speed, if the average current of the working current of the air pump in each operating cycle has a difference within a set time interval, which does not exceed a set error, the rotating speed of the air pump is controlled to decrease to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment; wherein the third set proportion is greater than the second set proportion; while the frequency of the compressor is controlled to decrease at a preset first rate, the three-way switch is controlled to be opened, and the air pump is controlled to be opened; after the air pump is opened, the rotating speed of the air pump is controlled to decrease to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment.

[0012] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; in the case where the refrigerant leakage treatment device comprises a three-way switch and an air pump, the operating parameters of the refrigerant leakage treatment device comprise: a rotating speed of the air pump; according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage treatment device, at least one of the following is controlled to perform a preset explosion-proof measure: the power-off of the outdoor unit, the on-off when not powered off and the operating parameters when powered on, the power-off of the indoor unit, the on-off when not powered off and the operating parameters when powered on, and the power-off of the refrigerant leakage treatment device, the on-off when not powered off and the operating parameters when powered on, further comprising: in the case where it is determined that the type of the refrigerant leakage signal is the preset third leakage type, the indoor unit is controlled to be powered off, the three-way switch is controlled to be opened, and the air pump is controlled to be opened; after the air pump is opened, the rotating speed of the air pump is controlled to decrease to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment.

[0013] According to the above method, the application further provides a control device of an air conditioner, the air conditioner having an outdoor part and an indoor part, the outdoor part including an outdoor unit and a refrigerant leakage treatment device, and the indoor part including an indoor unit; the control device of the air conditioner including: an acquisition unit configured to acquire a refrigerant leakage signal of the air conditioner; and, in the case that the refrigerant leakage treatment device is working, acquire a working current of the refrigerant leakage treatment device; a control unit configured to determine a type of the refrigerant leakage signal; the control unit further configured to control at least one of the following according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device to perform a preset explosion prevention measure: power-off of the outdoor unit, start-stop when not powered off and operation parameters when powered on, power-off of the indoor unit, start-stop when not powered off and operation parameters when powered on, and power-off of the refrigerant leakage treatment device, start-stop when not powered off and operation parameters when powered on.

[0014] In some embodiments, the indoor unit further has a drain pipe in communication with an outlet of a water pan of the indoor unit; the refrigerant leakage treatment device includes a power supply module and an exhaust module; the exhaust module includes a three-way switch and an air pump; the power supply module is configured to supply power to the three-way switch and the air pump; the three-way switch has a first end, a second end and a third end, the first end of the three-way switch is in communication with the air pump, the second end of the three-way switch is in communication with the drain pipe, and the third end of the three-way switch is in communication with the outside atmosphere; in the case that the three-way switch is opened, the air pump is in communication with the drain pipe; in the case that the three-way switch is closed, the drain pipe is in communication with the outside atmosphere.

[0015] In some embodiments, the type of the refrigerant leakage signal includes any one of a preset first leakage type, a preset second leakage type, and a preset third leakage type; the control unit determines the type of the refrigerant leakage signal by: determining the type of the refrigerant leakage signal as the preset first leakage type if it is determined that the air conditioner is operating in any one of a cooling mode of the air conditioner and a dehumidification mode of the air conditioner; determining the type of the refrigerant leakage signal as the preset second leakage type if it is determined that the air conditioner is operating in any one of a heating mode of the air conditioner, a blowing mode of the air conditioner, and a drying mode of the air conditioner; determining the type of the refrigerant leakage signal as the preset second leakage type if it is determined that the air conditioner is defrosting in the heating mode of the air conditioner and that a discharge temperature of a compressor in the air conditioner is greater than a preset discharge temperature threshold; and determining the type of the refrigerant leakage signal as the preset third leakage type if it is determined that the air conditioner is in a fault shutdown of the air conditioner or that the indoor unit has been started but the compressor in the air conditioner has not been started; and determining the type of the refrigerant leakage signal as the preset third leakage type if it is determined that the air conditioner is defrosting in the heating mode of the air conditioner and that the discharge temperature of the compressor in the air conditioner is less than or equal to the preset discharge temperature threshold.

[0016] In some embodiments, the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device, and an outdoor fan; the indoor unit has an indoor fan, and a damper; the control unit controls at least one of the following according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device to perform a preset explosion prevention measure: power-off of the outdoor unit, start-stop when not powered off, and operating parameters when powered on, power-off of the indoor unit, start-stop when not powered off, and operating parameters when powered on, and power-off of the refrigerant leakage treatment device, start-stop when not powered off, and operating parameters when powered on, including: in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controlling the compressor to remain on and controlling the frequency of the compressor to decrease at a preset first rate to a preset frequency, then controlling the compressor to stop and power off; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controlling the opening degree of the throttling device to remain at a current value during the controlling of the frequency of the compressor to decrease at the preset first rate; after the controlling of the compressor to stop and power off, controlling the opening degree of the throttling device to decrease at a preset second rate until the opening degree of the throttling device is 0; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controlling the start-stop of the indoor fan and the rotating speed when powered on according to the type of the refrigerant leakage signal, and controlling the start-stop of the damper; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controlling the start-stop of the outdoor fan and the rotating speed when powered on according to the type of the refrigerant leakage signal; in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controlling the power-off of the refrigerant leakage treatment device, the start-stop when not powered off, and the operating parameters when powered on according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device in the preset first leakage type.

[0017] In some embodiments, wherein the control unit, in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, controls the start and stop of the indoor fan and the rotating speed of the indoor fan at the start, and controls the start and stop of the air deflector according to the type of the refrigerant leakage signal, including: in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type, controlling the rotating speed of the indoor fan to start to decrease while controlling the frequency of the compressor to decrease at a preset first rate, and controlling the air deflector to start to close; and after controlling the compressor to stop and power off, controlling the indoor fan to stop and power off; in the case of determining that the type of the refrigerant leakage signal is a preset second leakage type, controlling the rotating speed of the indoor fan to start to maintain a current value while controlling the frequency of the compressor to decrease at a preset first rate; controlling the air deflector to start to close while controlling the compressor to stop and power off; and after controlling the compressor to stop and power off, controlling the indoor fan to stop and power off.

[0018] And / or, the control unit, in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, according to the type of the refrigerant leakage signal, controls the start-stop and the rotating speed at start of the outdoor fan, and controls whether the refrigerant leakage treatment device is powered off, the start-stop when not powered off, and the operating parameter at start, comprising: in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type, during the control of the frequency of the compressor being reduced at a preset first rate, the rotating speed of the outdoor fan is controlled to maintain the current value; while controlling the opening degree of the throttling device to be small, the rotating speed of the outdoor fan is controlled to rise until the rotating speed of the outdoor fan reaches a preset maximum fan rotating speed, the rotating speed of the outdoor fan is controlled to maintain the current value; and when the opening degree of the throttling device is controlled to be small to 0, the outdoor fan is controlled to stop and be powered off; in the case of determining that the type of the refrigerant leakage signal is a preset second leakage type, during the control of the frequency of the compressor being reduced at a preset first rate, the rotating speed of the outdoor fan is controlled to start to be reduced by a first set proportion based on the current value of the rotating speed of the outdoor fan, and then maintain a new current value; while controlling the opening degree of the throttling device to be small, the rotating speed of the outdoor fan is controlled to rise until the rotating speed of the outdoor fan continues to be reduced to a preset minimum fan rotating speed, the rotating speed of the outdoor fan is controlled to maintain the current value; and when the opening degree of the throttling device is controlled to be small to 0, the outdoor fan is controlled to stop and be powered off; wherein, in the case of determining that the type of the refrigerant leakage signal is a preset second leakage type, in the heating mode of the air conditioner and the electric auxiliary heating device of the air conditioner is turned on, the electric auxiliary heating device is controlled to be turned off and powered off; and / or, in the case of the refrigerant leakage treatment device comprising a three-way switch and an air pump, the operating parameter of the refrigerant leakage treatment device comprises: the rotating speed of the air pump; the working current of the refrigerant leakage treatment device, comprising: the working current of the air pump; the control unit, in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, according to the type of the refrigerant leakage signal, and in the case of the preset first leakage type, in combination with the working current of the refrigerant leakage treatment device, controls whether the refrigerant leakage treatment device is powered off, the start-stop when not powered off, and the operating parameter at start, comprising: while controlling the frequency of the compressor to be reduced at a preset first rate, the three-way switch is controlled to be turned on, and the air pump is controlled to be turned on; after the air pump is turned on, the air pump is controlled to rotate at a preset maximum pump rotating speed for a first preset time length, then the rotating speed of the air pump is controlled to be reduced to a second set proportion of the preset maximum pump rotating speed, and then run for a second preset time length, and then the rotating speed of the air pump is controlled to be increased to the preset maximum pump rotating speed for a third preset time length.After the gas pump is running at the preset highest pump rotating speed, if the difference between the average currents of two operation cycles within a set time interval is not more than a set error, the average current of the working current of the gas pump is controlled to reduce the rotating speed of the gas pump to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment; the third set proportion is greater than the second set proportion; the three-way switch is controlled to be opened and the gas pump is controlled to be opened while the frequency of the compressor is controlled to reduce at a preset first rate; after the gas pump is opened, the rotating speed of the gas pump is controlled to reduce to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment.

[0019] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; in the case that the refrigerant leakage treatment device comprises a three-way switch and a gas pump, the operating parameters of the refrigerant leakage treatment device comprise the rotating speed of the gas pump; the control unit controls at least one of the following according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device to execute a preset explosion prevention measure: whether the outdoor unit is powered off, the on-off when not powered off and the operating parameters when turned on, whether the indoor unit is powered off, the on-off when not powered off and the operating parameters when turned on, and whether the refrigerant leakage treatment device is powered off, the on-off when not powered off and the operating parameters when turned on; the control unit further controls the indoor unit to be powered off, controls the three-way switch to be opened and controls the gas pump to be opened in the case that the type of the refrigerant leakage signal is determined to be the preset third leakage type; after the gas pump is opened, the rotating speed of the gas pump is controlled to reduce to a third set proportion of the preset highest pump rotating speed and then maintain the current value for air exhaust treatment.

[0020] In order to match the above device, the application further provides an air conditioner comprising the above-mentioned control device of the air conditioner.

[0021] In order to match the above method, the application further provides a storage medium comprising a stored program, wherein the device where the storage medium is located executes the steps of the above-mentioned control method of the air conditioner when the program is running.

[0022] In order to match the above method, the application further provides a computer program product comprising a computer program, which realizes the steps of the above-mentioned control method of the air conditioner when executed by a processor.

[0023] Thus, the scheme of the present application, for the refrigerant leakage treatment of air conditioner, sets refrigerant leakage treatment device (such as refrigerant leakage detection device composed of power supply unit and exhaust unit) on the outdoor side of air conditioner, sets detection unit on the indoor side; in the case of determining refrigerant leakage of air conditioner through detection unit, sends refrigerant leakage signal (such as signal L, signal H and signal O) to refrigerant leakage treatment system (such as system containing refrigerant leakage treatment device) by indoor unit; refrigerant leakage treatment system controls the operation of compressor, electronic expansion valve, indoor fan, air deflector, outdoor fan, three-way valve and air pump in exhaust unit according to the type of received refrigerant leakage signal, and considers the opening and closing of defrosting process and electric auxiliary heating device in the case of air conditioner heating, to execute preset active explosion prevention measures; thus, by setting refrigerant leakage treatment device on the outdoor side of air conditioner, and taking active explosion prevention measures in the case of determining refrigerant leakage of air conditioner, the safety is improved.

[0024] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application.

[0025] The technical scheme of the present application will be further described in detail below with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Flowchart of an embodiment of the control method of air conditioner of the present application;

[0027] Figure 2 Flowchart of an embodiment of the method of executing preset explosion prevention measures of the present application;

[0028] Figure 3 Structural diagram of an embodiment of the control device of air conditioner of the present application;

[0029] Figure 4 Structural diagram of refrigerant leakage treatment device of air conditioner;

[0030] Figure 5 Flowchart of refrigerant leakage treatment method of air conditioner;

[0031] Figure 6 Leakage treatment timing diagram after refrigerant leakage during air conditioner cooling;

[0032] Figure 7 Leakage treatment timing diagram after refrigerant leakage during air conditioner heating.

[0033] In combination with the drawings, the reference signs in the embodiments of the present application are as follows:

[0034] 102 - acquisition unit; 104 - control unit. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in conjunction with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] It is considered that when the air conditioner refrigerant adopts a natural working medium represented by R290, there is a safety problem of how to prevent fire and explosion in the case of refrigerant leakage. In the related scheme, there are few methods for handling refrigerant leakage in the field of household air conditioners. Generally, fresh air conditioners can use fresh air exhaust, and air conditioners without such structure generally have no handling method.

[0037] Therefore, the scheme of the present application proposes a control method of an air conditioner, specifically a refrigerant leakage handling method for a photovoltaic direct-drive R290 air conditioner. Under the condition that there is no fresh air structure, the refrigerant leakage situation is handled through certain control method and the characteristics of photovoltaic air conditioner.

[0038] According to the embodiments of the present application, a control method of an air conditioner is provided, as shown in Figure 1 the flowchart of an embodiment of the method of the present application. The control method of the air conditioner can preferably be applied to refrigerant leakage handling of a photovoltaic direct-drive R290 air conditioner, the air conditioner has an outdoor unit, an indoor unit, and a refrigerant leakage handling device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit), and the outdoor unit and the refrigerant leakage handling device are both located on the outdoor side of the air conditioner. In the scheme of the present application, as shown in Figure 1 the control method of the air conditioner comprises steps S110 to S130.

[0039] At step S110, in the case that the air conditioner is running or the air conditioner is stopped, the refrigerant leakage signal of the air conditioner is acquired from the indoor unit at the refrigerant leakage handling device of the outdoor unit; and in the case that the refrigerant leakage handling device is working, the working current of the refrigerant leakage handling device is acquired from one side of the outdoor unit at the refrigerant leakage handling device of the outdoor unit; wherein the refrigerant leakage signal of the air conditioner is signal L, signal H and signal O, and the working current of the refrigerant leakage handling device is the current of the air pump.

[0040] At step S120, the type of the refrigerant leakage signal is determined from one side of the outdoor unit at the refrigerant leakage handling device of the outdoor unit.

[0041] At step S130, at the refrigerant leakage handling device of the outdoor unit, from the side of the outdoor unit, according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage handling device, at least one of the following is controlled to execute the preset explosion prevention measures: whether the outdoor unit is powered off, the on-off when not powered off and the operating parameters when turned on, whether the indoor unit is powered off, the on-off of the indoor unit when not powered off and the operating parameters when turned on, and whether the refrigerant leakage handling device is powered off, the on-off when not powered off and the operating parameters when turned on.

[0042] Specifically, the scheme of the present application provides a control method of an air conditioner, which is preferably applicable to refrigerant leakage handling of a photovoltaic direct-drive R290 air conditioner. The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), an outdoor fan, and a refrigerant leakage handling device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit). The indoor unit has an indoor fan and a damper. In the scheme of the present application, the control method of the air conditioner comprises:

[0043] In the case of operation of the air conditioner or shutdown of the air conditioner, the refrigerant leakage signal of the air conditioner is obtained from the indoor unit at the refrigerant leakage handling device of the outdoor unit. In the case of defrosting in the heating mode of the air conditioner, the discharge temperature of the compressor is obtained from the side of the outdoor unit at the refrigerant leakage handling device of the outdoor unit. In the case of working of the refrigerant leakage handling device, the working current of the refrigerant leakage handling device is obtained from the side of the outdoor unit at the refrigerant leakage handling device of the outdoor unit. The refrigerant leakage signal of the air conditioner is signal L, signal H and signal O. The working current of the refrigerant leakage handling device is the current of the gas pump.

[0044] At the refrigerant leakage handling device of the outdoor unit, the type of the refrigerant leakage signal is determined from the side of the outdoor unit.

[0045] At the refrigerant leakage handling device of the outdoor unit, according to the type of the refrigerant leakage signal, and in combination with the working current of the refrigerant leakage handling device, at least one of the following is controlled to execute the preset explosion prevention measures: whether the compressor is powered off, the on-off when not powered off and the frequency when turned on, whether the throttling device is powered off, the opening degree when not powered off, whether the outdoor fan is powered off, the on-off when not powered off and the rotating speed when turned on, whether the refrigerant leakage handling device is powered off, the on-off when not powered off and the operating parameters when turned on, whether the indoor unit is powered off, the rotating speed of the indoor fan when the indoor unit is not powered off and the on-off of the damper when the indoor unit is not powered off.

[0046] The scheme of the present application provides a refrigerant leakage processing scheme for a photovoltaic direct-drive R290 air conditioner. The scheme combines the energy storage and power supply characteristics of the photovoltaic air conditioner, does not need to add new air ducts and other complex structures, slightly modifies the existing air conditioner indoor unit drain pipe, and cooperates with related logic to realize an R290 special leakage processing mode, control the refrigerant leakage range in the air conditioner, realize fire and explosion prevention of the air conditioner and the room, and ensure the safety of user property. In this way, under the condition that the air conditioner does not have a fresh air structure, the refrigerant leakage condition is processed through a certain control method and the characteristics of the photovoltaic air conditioner.

[0047] In some embodiments, the indoor unit also has a drain pipe in communication with the drain pan outlet of the indoor unit; the refrigerant leakage processing device comprises: a power supply module, such as a power supply part in the power supply unit shown in Figure 4 , an exhaust module, such as an exhaust part in the exhaust unit shown in Figure 4 ; the exhaust module comprises a three-way switch and an air pump, and the three-way switch is, for example, a three-way electromagnetic valve.

[0048] The power supply module is configured to supply power to the three-way switch and the air pump. The three-way switch has a first end, a second end, and a third end. The first end of the three-way switch is in communication with the air pump, the second end of the three-way switch is in communication with the drain pipe, and the third end of the three-way switch is in communication with the outside atmosphere. When the three-way switch is open, the air pump is in communication with the drain pipe. When the three-way switch is closed, the drain pipe is in communication with the outside atmosphere.

[0049] In the scheme of the present application, the refrigerant leakage processing device of the air conditioner is located on the outdoor side, is powered by photovoltaic power, is not normally open, and is only powered on when the alkane sensor detects or calculates that the refrigerant leaks. Figure 4 The structure diagram of the refrigerant leakage processing device of the air conditioner is shown in Figure 4 . The refrigerant leakage processing device of the air conditioner is composed of a controller, an air pump, a three-way valve (i.e. an electromagnetic three-way valve), an air pipe (i.e. a drain pipe) to form an exhaust unit, a temperature sensing bag and an alkane sensor, and a controller to form a detection unit, a photovoltaic power supply, a relay, and a controller to form a power supply unit. The refrigerant leakage processing is completed by the cooperation of the exhaust unit, the detection unit, and the power supply.

[0050] In the exhaust unit shown in Figure 4 , the three-way valve has three ends. The first end of the three ends of the three-way valve is connected to one end of the air pump, the second end is connected to the drain pan outlet of the indoor unit, and the third end is connected to the outside atmosphere. The other end of the air pump is connected to the outside atmosphere. In the normally open state of the three-way valve, the air pump is in communication with the drain pan outlet of the indoor unit. In the normally closed state of the three-way valve, the drain pan outlet of the indoor unit is in communication with the outside atmosphere.

[0051] In the air exhaust unit, a controller controls a three-way valve and an air pipe (drain pipe). In the detection unit, a temperature sensing bag is used to detect temperature, and an alkane sensor is used to detect alkane gas concentration. In the power supply unit, a relay is used to control the on-off of the photovoltaic power supply. In the scheme of the present application, the air exhaust unit can accommodate photovoltaic power, and is used to ensure the safety of electricity use in the event of leakage.

[0052] In the scheme of the present application, by providing a refrigerant leakage treatment device on the outdoor side of the air conditioner, active explosion-proof measures are taken in the case of determining that the air conditioner refrigerant leaks, the safety of the user is protected, and the occurrence of dangerous situations is prevented,

[0053] In some embodiments, the type of the refrigerant leakage signal includes any one of the following types: a preset first leakage type, a preset second leakage type, and a preset third leakage type, the preset first leakage type is like the type of signal L, the preset second leakage type is like the type of signal H, and the preset third leakage type is like the type of signal O.

[0054] The type of the refrigerant leakage signal is determined in step S120, including any one of the following determination cases:

[0055] The first determination case: if it is determined that the air conditioner is running in any one of the cooling mode of the air conditioner, the dehumidification mode of the air conditioner, the heating mode of the air conditioner, the air supply mode of the air conditioner, and the drying mode of the air conditioner, it is determined that the type of the refrigerant leakage signal is the preset first leakage type.

[0056] The second determination case: if it is determined that the air conditioner is running in any one of the heating mode of the air conditioner, the air supply mode of the air conditioner, and the drying mode of the air conditioner, it is determined that the type of the refrigerant leakage signal is the preset second leakage type.

[0057] The third determination case: in the case of determining that the air conditioner is defrosting in the heating mode of the air conditioner, if it is determined that the discharge temperature of the compressor in the air conditioner is greater than a preset discharge temperature threshold, it is determined that the type of the refrigerant leakage signal is the preset second leakage type; wherein the preset discharge temperature threshold is, for example, 60℃.

[0058] The fourth determination case: if it is determined that the air conditioner is in the case of air conditioner failure shutdown or the indoor unit has started but the compressor in the air conditioner has not started, it is determined that the type of the refrigerant leakage signal is the preset third leakage type.

[0059] The fifth determination case: in the case of determining that the air conditioner is defrosting in the heating mode of the air conditioner, if it is determined that the discharge temperature of the compressor in the air conditioner is less than or equal to a preset discharge temperature threshold, it is determined that the type of the refrigerant leakage signal is the preset third leakage type.

[0060] Figure 5Flowchart of the air conditioner refrigerant leakage treatment method. As shown in Figure 5 The air conditioner refrigerant leakage treatment method comprises the following steps.

[0061] Step 1: When the air conditioner refrigerant leakage is determined, a refrigerant leakage signal is sent out. After the refrigerant leakage signal is sent out, it is determined whether the refrigerant leakage signal is signal L, signal H or signal O: if the refrigerant leakage signal is signal L, step 2 is performed, if the refrigerant leakage signal is signal H, step 3 is performed, and if the refrigerant leakage signal is signal O, step 4 is performed.

[0062] In step 1, when the system detects that the refrigerant is leaking, the indoor unit sends a signal to the leakage treatment system at this time (i.e. sends a refrigerant leakage signal): the refrigerant leakage signal is signal L when the air conditioner is cooling, signal H when the air conditioner is heating, and signal O when the air conditioner is stopped. When the above three signals are sent, the authority of the leakage system controller is superior to all control logics of the air conditioner, and the indoor unit and the outdoor unit are controlled by the leakage system controller.

[0063] In some schemes, the strategy adopted for R290 air conditioners is to use an alkane sensor to sense the R290 concentration in indoor air to determine it. The density of R290 is greater than the average density of air, so when the system refrigerant of the air conditioner leaks in the on state, the distance from the alkane sensor is far, and it will gradually settle to the lower layer of air with the air outlet (after cooling or heating is blown out, it will gradually drop to the lower layer of room air), so when the air conditioner determines that the indoor evaporator is leaking refrigerant at this time according to the alkane sensor or according to the refrigerant leakage detection method of the air conditioner proposed in the prior application with the application number 2024109843035, the multiple modes provided in the scheme of the present application are adopted to cope with it.

[0064] Among them, the system refrigerant leakage position of the air conditioner has the following three possible leakage positions: the first type is the joint of the system, such as the joint of the indoor unit and the outdoor unit and the corresponding connecting pipe; the second type is the pipe that has the possibility of long-term water immersion, such as the pipe with water accumulated in the indoor evaporator orthosis frame and the pipe with water accumulated in the outdoor unit chassis; the third type is the pipe with large stress and strain, such as the suction and exhaust ports and other positions.

[0065] In the scheme of the present application, the refrigerant leakage signal is signal L when the air conditioner is cooling, signal H when the air conditioner is heating, and signal O when the air conditioner is stopped.

[0066] In the air conditioner dehumidification mode, a signal L is sent to the outdoor unit. In the air conditioner blowing mode, a signal H is sent to the outdoor unit. In the air conditioner drying mode, a signal H is sent to the outdoor unit. In the air conditioner fault shutdown mode, a signal O is sent to the outdoor unit, or when the indoor unit has started and the compressor has not started. In the drying mode, it is a mode in the heating condition, and in the dehumidification mode, it is a mode in the cooling condition.

[0067] In the heating defrosting process, the discharge temperature of the compressor is less than or equal to 60℃, and a signal O is sent to the outdoor unit. Because the high-low pressure difference will be smaller, the indoor and outdoor units no longer need to be de-energized, and can be directly powered off. Otherwise, a signal L is sent to the outdoor unit.

[0068] In the scheme of the present application, after the indoor unit detects refrigerant leakage, a refrigerant leakage signal is sent to the refrigerant leakage processing device on the outdoor side. The type of the refrigerant leakage signal matches the current state of the air conditioner, so that the refrigerant leakage processing device on the outdoor side executes corresponding explosion-proof measures according to the type of the refrigerant leakage signal, thereby improving safety.

[0069] In some embodiments, the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), and an outdoor fan; and the indoor unit has an indoor fan and a damper.

[0070] In step S130, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage processing device, at least one of the following is controlled to execute the preset explosion-proof measures: whether the outdoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, and whether the refrigerant leakage processing device is powered off, the start-stop when not powered off and the operating parameter when turned on. In combination with the working current of the refrigerant leakage processing device, at least one of the following is controlled to execute the preset explosion-proof measures: whether the compressor is powered off, the start-stop when not powered off and the frequency when turned on, whether the throttling device is powered off, the opening degree when not powered off, whether the outdoor fan is powered off, the start-stop when not powered off and the rotating speed when turned on, whether the refrigerant leakage processing device is powered off, the start-stop when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the rotating speed of the indoor fan when not powered off and when turned on, and the start-stop of the damper when the indoor unit is not powered off. See the following exemplary description for details.

[0071] The following will be described in combination with Figure 2An embodiment flowchart of the method of the present application is shown, which further illustrates the specific process of executing the preset explosion prevention measures in step S130, including steps S210 to S250.

[0072] Step S210, in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, after controlling the compressor to keep on and controlling the frequency of the compressor to decrease at a preset first rate to a preset frequency, the compressor is controlled to stop and power off; wherein the preset first rate is, for example, a speed of 3Hz / s, and the preset frequency is, for example, 30Hz.

[0073] Step S220, in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, during the period of controlling the frequency of the compressor to decrease at the preset first rate, the opening degree of the throttling device is controlled to keep the current value; after the compressor is controlled to stop and power off, the opening degree of the throttling device is controlled to decrease at a preset second rate until the opening degree of the throttling device is 0; wherein the preset first rate is, for example, a speed of 50b / s.

[0074] Step S230, in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, the start-stop and the rotating speed when starting of the indoor fan are controlled, and the start-stop of the air deflector is controlled.

[0075] Step S240, in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, the start-stop and the rotating speed when starting of the outdoor fan are controlled.

[0076] Step S250, in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, and in the case of the preset first leakage type, the working current of the refrigerant leakage treatment device is combined to control whether the refrigerant leakage treatment device is powered off, the start-stop when not powered off, and the operating parameters when starting.

[0077] In the scheme of the present application, in the case of refrigerant leakage treatment in air conditioning refrigeration: first, the detection part is divided into alkane concentration detection and system leakage detection, and since the leakage is determined to occur, the compressor is first reduced in frequency and then turned off, and the purpose of this treatment is to prevent the system pressure from fluctuating sharply due to sudden power failure of the compressor at high frequency, because the system has a rupture, and a huge pressure change can further cause the rupture to worsen; at the same time, during the compressor frequency reduction, the electronic expansion valve opening is maintained at the opening one second before the frequency reduction; after the compressor is turned off, the electronic expansion valve is reset to closed to flow without flow (specifically, an electronic expansion valve with closed no-flow valve is used), the indoor fan is turned off, the air deflector is turned off, and finally the outdoor fan is turned off. In the scheme of the present application, in the case of refrigerant leakage treatment in air conditioning refrigeration, the significance of setting the closing sequence of each part is that: first, the compressor is turned off to reduce the maximum system pressure, the electronic expansion valve is closed to limit the flow of refrigerant to a certain extent, the indoor fan is turned off to prevent further refrigerant flow to the indoor side, and the air deflector is also turned off (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air deflector can reduce the leakage amount).

[0078] In the case of air conditioning refrigeration operation, the remote control signal is invalid after the refrigerant leakage treatment signal is issued; the indoor unit is immediately powered off after the refrigerant leakage treatment is completed, and the purpose is to further reduce the safety hidden danger, including the safety hidden danger of customer's own misoperation. In the scheme of the present application, the exhaust is directly performed at the same time as the refrigerant leakage signal is issued; if the leakage is found in the air conditioning stop state, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from sparking, and the outdoor side starts the air pump to exhaust.

[0079] In the scheme of the present application, when refrigerant leakage treatment is performed in the case of air conditioning heating: firstly, the detection part is divided into alkane concentration detection and system leakage detection, and the compressor is first reduced in frequency and then turned off due to the determination of leakage, and the purpose of the treatment is to prevent the system pressure from fluctuating sharply due to sudden power-off of the compressor at high frequency, because the system has a rupture, and a huge pressure change may further cause the rupture to worsen; at the same time, during the compressor frequency reduction, the electronic expansion valve opening is maintained at the opening of the previous second; after the compressor is turned off, the electronic expansion valve is reset to close the flow (specifically, an electronic expansion valve with closed flow is used); the indoor fan speed is kept unchanged, the air deflector is closed, and the outdoor fan is reduced to the lowest during the compressor frequency reduction, and the outdoor fan is turned off after the compressor is turned off. The significance of setting the closing sequence of each component in the scheme of the present application when refrigerant leakage treatment is performed in the case of air conditioning heating is that: firstly, the compressor is turned off to reduce the maximum system pressure, the electronic expansion valve is closed to limit the flow of refrigerant to a certain extent, the indoor fan is closed to prevent refrigerant from flowing further to the indoor side, and the air deflector is also closed (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air deflector can reduce the leakage amount).

[0080] In the case of air conditioning heating operation, the remote control signal is invalid after the refrigerant leakage treatment signal is issued; the indoor unit is powered off immediately after the refrigerant leakage treatment is completed, and the purpose is to further reduce the safety hidden danger, including the safety hidden danger of customer's own misoperation. In the scheme of the present application, the exhaust action is directly performed when the refrigerant leakage signal is issued; if leakage is found in the air conditioning stopped state, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from sparking, and the outdoor side starts the air pump to exhaust.

[0081] In some embodiments, in the case where it is determined in step S230 that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, the opening and closing of the indoor fan and the speed of the indoor fan when it is turned on are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air deflector are controlled, including any of the following indoor side control cases:

[0082] The first indoor side control case: in the case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type, the speed of the indoor fan is controlled to start to decrease, and the air deflector is controlled to start to close, while the frequency of the compressor is controlled to decrease at a preset first rate; and after the compressor is controlled to stop and be powered off, the indoor fan is controlled to stop and be powered off.

[0083] The second indoor side control case: in the case that the type of the refrigerant leakage signal is determined as the preset second leakage type, the rotation speed of the indoor fan is controlled to start maintaining the current value while the frequency of the compressor is controlled to decrease at the preset first rate; the damper is controlled to start closing while the compressor is controlled to stop and power off; and the indoor fan is controlled to stop and power off after the compressor is controlled to stop and power off.

[0084] In the scheme of the present application, in the case that the type of the refrigerant leakage signal is determined as the preset first leakage type or the preset second leakage type, the opening and closing of the indoor fan and the rotation speed of the indoor fan at the time of opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the damper are controlled, the operation of the indoor electrical appliance is stopped and powered on again, the electric spark in the indoor is prevented, and the safety is improved.

[0085] In some embodiments, in the case that the type of the refrigerant leakage signal is determined as the preset first leakage type or the preset second leakage type in step S240, the opening and closing of the outdoor fan and the rotation speed of the outdoor fan at the time of opening are controlled according to the type of the refrigerant leakage signal, and whether the refrigerant leakage processing device is powered off, the opening and closing at the time of opening and the operating parameters when not powered off are controlled, including any one of the following outdoor side control cases:

[0086] The first outdoor side control case: in the case that the type of the refrigerant leakage signal is determined as the preset first leakage type, the rotation speed of the outdoor fan is controlled to maintain the current value during the frequency of the compressor is controlled to decrease at the preset first rate; the rotation speed of the outdoor fan is controlled to rise until the rotation speed of the outdoor fan reaches the preset maximum fan rotation speed when the opening of the throttling device is controlled to close, and then the rotation speed of the outdoor fan is controlled to maintain the current value; and the outdoor fan is controlled to stop and power off when the opening of the throttling device is controlled to close to 0.

[0087] In a second outdoor side control scenario, in a case where the type of the refrigerant leakage signal is determined to be a preset second leakage type, during control of the frequency of the compressor to decrease at a preset first rate, the rotation speed of the outdoor fan is controlled to decrease by a first set proportion from a current value of the rotation speed of the outdoor fan and then maintain a new current value (specifically, the rotation speed of the outdoor fan is controlled to decrease by the first set proportion from the current value of the rotation speed of the outdoor fan and then maintain a new current value of the rotation speed of the outdoor fan); while the opening degree of the throttling device is controlled to be closed, the rotation speed of the outdoor fan is controlled to increase until the rotation speed of the outdoor fan continues to decrease to a preset minimum fan rotation speed, at which time the rotation speed of the outdoor fan is controlled to maintain a current value; and when the opening degree of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to be stopped and powered off; wherein the first set proportion is, for example, 30%.

[0088] In a case where the type of the refrigerant leakage signal is determined to be a preset second leakage type, in a heating mode of the air conditioner and in a case where the electric auxiliary heating device of the air conditioner is turned on, the electric auxiliary heating device is controlled to be turned off and powered off; in the scheme of the present application, in the heating mode of the air conditioner, when the outdoor unit receives an H signal, the electric auxiliary heating device is powered off even if it is turned on.

[0089] In the scheme of the present application, in a case where the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, according to the type of the refrigerant leakage signal, the start and stop of the outdoor fan and the rotation speed of the outdoor fan when it is started are controlled, and whether the refrigerant leakage treatment device is powered off or not, the start and stop of the refrigerant leakage treatment device when it is started, and the operating parameters of the refrigerant leakage treatment device when it is started are controlled, the outdoor electric appliance is started, the cumulative amount of indoor refrigerant is reduced, and the safety is improved.

[0090] In some embodiments, in a case where the refrigerant leakage treatment device comprises a three-way switch and a gas pump, the operating parameters of the refrigerant leakage treatment device include the rotation speed of the gas pump and the operating current of the refrigerant leakage treatment device, including the operating current of the gas pump.

[0091] In step S250, in a case where the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, according to the type of the refrigerant leakage signal, and in the preset first leakage type, in combination with the operating current of the refrigerant leakage treatment device, whether the refrigerant leakage treatment device is powered off or not, the start and stop of the refrigerant leakage treatment device when it is started, and the operating parameters of the refrigerant leakage treatment device when it is started are controlled, including any one of the following outdoor side refrigerant leakage treatment scenarios:

[0092] The first outdoor side refrigerant leakage processing case: while controlling the frequency of the compressor to decrease at a preset first rate, the three-way switch is controlled to open, and the gas pump is controlled to open; after the gas pump is opened, the gas pump is controlled to rotate at a preset highest pump rotating speed for a first preset time length, then the rotating speed of the gas pump is controlled to decrease to a second set proportion of the preset highest pump rotating speed, and the gas pump is controlled to run for a second preset time length, and then the rotating speed of the gas pump is controlled to increase to the preset highest pump rotating speed for a third preset time length; then, when the gas pump runs at the preset highest pump rotating speed, if the difference between the average currents of two running cycles within a set time interval is not more than a set error, the rotating speed of the gas pump is controlled to decrease to a third set proportion of the preset highest pump rotating speed and maintain the current value for air exhaust processing until manual control; the third set proportion is greater than the second set proportion, for example, the second set proportion is 50%, the third set proportion is 70%, the first preset time length is 15s, the second preset time length is 10s, and the third preset time length is 15s.

[0093] The second outdoor side refrigerant leakage processing case: while controlling the frequency of the compressor to decrease at a preset first rate, the three-way switch is controlled to open, and the gas pump is controlled to open; after the gas pump is opened, the rotating speed of the gas pump is controlled to decrease to a third set proportion of the preset highest pump rotating speed and maintain the current value for air exhaust processing until manual control. The third set proportion is, for example, 70%.

[0094] In the scheme, when it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, according to the type of the refrigerant leakage signal, and in the preset first leakage type, whether the refrigerant leakage processing device is powered off, the on-off when not powered off, and the running parameter when turned on are controlled in combination with the working current of the refrigerant leakage processing device, the indoor refrigerant cumulative amount is further reduced, and the safety is improved.

[0095] As shown in Figure 5 The refrigerant leakage processing method of the air conditioner further includes: step 2, when the signal L is sent, the leakage processing system obtains the highest running permission: first, the frequency of the compressor is decreased to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off; during the frequency reduction of the compressor, the opening degree of the electronic expansion valve is unchanged (for example, the opening degree of the electronic expansion valve is maintained to be the opening degree one second before the frequency reduction), and after the compressor is stopped, the opening degree of the electronic expansion valve is closed at a speed of 50b / s, and the opening degree of the electronic expansion valve is closed until the opening degree is reset to 0.

[0096] In step 2, the indoor fan starts to reduce the rotating speed at the same time when the compressor starts to reduce the frequency; the indoor fan is powered off when the compressor is powered off, and the air deflector starts to close at the same time when the compressor starts to reduce the frequency. The compressor reduction period refers to the time period, and the time point when the compressor starts to reduce the frequency is the time point when the compressor starts to reduce the frequency.

[0097] Figure 6 The leakage processing timing chart for the air conditioner refrigerant leakage. In step 2, as shown in Figure 6 , the outdoor fan speed is unchanged during the compressor reduction period; when the electronic expansion valve is closed, the outdoor fan speed rises to the highest speed; the outdoor fan is powered off after the electronic expansion valve is completely closed; the three-way valve is opened synchronously with the compressor reduction, and the air pump is operated synchronously with the compressor reduction.

[0098] In Figure 4 , the air pump rotates at the highest speed for 15s, reduces to 50% of the highest speed for 10s, and then rises to the highest speed for 15s during the drainage action of the three-way valve in the open state. The current of the air pump is detected during this period.

[0099] When the average current of the air pump during the highest speed operation period appears two periods of 5s, and the current difference is not more than 5%, it is judged that the water has been drained, the air pump speed can be reduced to 70% of the highest speed and kept constant; until the after-sales personnel come to handle, manually close the outdoor unit processing system (such as the exhaust unit) on the outside, as shown in Figure 6 .

[0100] As shown in Figure 5 , the refrigerant leakage processing method of the air conditioner further comprises: step 3, when the signal H is issued, the leakage processing system obtains the highest operation permission: first, the compressor frequency is reduced to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off. The opening degree of the electronic expansion valve is unchanged during the compressor reduction period (such as the opening degree of the electronic expansion valve maintaining the opening degree one second before the reduction), and the opening degree of the electronic expansion valve is reduced at a speed of 50b / s after the compressor is powered off. The opening degree of the electronic expansion valve is reduced until the reset is closed to the opening degree of 0.

[0101] In step 3, the indoor fan speed starts to be unchanged at the same time when the compressor starts to reduce the frequency; the indoor fan is powered off when the compressor is powered off, and the air deflector starts to close at the same time when the compressor is powered off.

[0102] Figure 7The leakage processing timing chart after refrigerant leakage for air conditioning heating. In step 3, the outdoor fan starts to reduce to 70% of the current speed during the compressor frequency reduction, and when the electronic expansion valve is closed, the outdoor fan speed is reduced to the minimum speed, such as 450 rpm; when the electronic expansion valve is completely closed, the outdoor fan is powered off. The three-way valve is opened synchronously with the compressor frequency reduction, and the air pump is synchronously with the compressor frequency reduction.

[0103] In Figure 4 In the exhaust unit shown, the three-way valve is in the open state, the air pump speed is 70% of the highest speed and remains constant until the after-sales personnel arrive for processing, manually turn off the outdoor unit processing system, see for example Figure 7 The timing chart.

[0104] In the scheme of the present application, after discovering system leakage, stop the work of indoor appliances and re-energize, start the work of outdoor appliances, prevent indoor electric spark, prevent danger, and improve safety.

[0105] In some embodiments, the type of refrigerant leakage signal is a preset third leakage type; in the case where the refrigerant leakage processing device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage processing device include the speed of the air pump.

[0106] In step S130, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, at least one of the following is controlled to execute the preset explosion prevention measure: whether the outdoor unit is powered off, the on-off when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the on-off when not powered off and the operating parameter when turned on, and whether the refrigerant leakage treatment device is powered off, the on-off when not powered off and the operating parameter when turned on. The explosion prevention measure includes: according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, at least one of the following is controlled to execute the preset explosion prevention measure: whether the compressor is powered off, the on-off when not powered off and the frequency when turned on, whether the throttling device is powered off, the opening degree when not powered off, whether the outdoor fan is powered off, the on-off when not powered off and the rotating speed when turned on, whether the refrigerant leakage treatment device is powered off, the on-off when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the rotating speed of the indoor fan when the indoor unit is not powered off and the on-off of the air deflector when the indoor unit is not powered off. Specifically, it further includes: in the case where it is determined that the type of the refrigerant leakage signal is a preset third leakage type, the indoor unit is powered off, the three-way switch is turned on, and the air pump is turned on; after the air pump is turned on, the rotating speed of the air pump is reduced to a third set proportion of the preset highest pump rotating speed and then maintained at the current value for exhaust treatment until manual control. The third set proportion is, for example, 70%.

[0107] As shown in Figure 5 , the refrigerant leakage treatment method of the air conditioner further includes: step 4, in the shutdown state, it is detected that: when the signal O is issued, the indoor unit is powered off, the outdoor unit leakage system operates the same as the heating. The three-way valve is opened, the air pump is communicated with the outlet of the indoor unit water pan in the normally open state of the three-way valve; the outlet of the indoor unit water pan is communicated with the outside in the normally closed state of the three-way valve, and the exhaust action is performed, the rotating speed of the air pump is 70% of the highest rotating speed and remains constant until the after-sales personnel arrives for treatment, manually closes the outdoor unit treatment system on the outside, which can be specifically seen from the timing diagram as shown in Figure 7 .

[0108] In the scheme of the present application, after the system leakage is found by the exhaust unit, active explosion prevention measures are taken to protect the safety of the user and prevent dangerous situations from occurring, thereby solving the safety problem of air conditioner fire and explosion prevention after the refrigerant leakage of the R290 air conditioner.

[0109] The technical scheme of the embodiment is adopted, the refrigerant leakage processing device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit) is arranged on the outdoor side of the air conditioner, the detection unit is arranged on the indoor side, the indoor unit sends the refrigerant leakage signal (such as the signals L, H and O) to the refrigerant leakage processing system (such as a system containing the refrigerant leakage processing device) in the case of determining that the air conditioner has refrigerant leakage through the detection unit, the refrigerant leakage processing system controls the operation of the compressor, the electronic expansion valve, the indoor fan, the air deflector, the outdoor fan, and the three-way valve and the air pump of the exhaust unit according to the type of the received refrigerant leakage signal, and considers the defrosting process and the opening and closing of the electric auxiliary heating device in the case of air conditioner heating to perform the preset active explosion prevention measure, so that the safety is improved by arranging the refrigerant leakage processing device on the outdoor side of the air conditioner and taking the active explosion prevention measure in the case of determining that the air conditioner has refrigerant leakage.

[0110] According to the embodiment of the application, a control device of an air conditioner corresponding to a control method of the air conditioner is also provided. Referring to Figure 3 The structure diagram of an embodiment of the device of the application is shown. The control device of the air conditioner can preferably be applied to refrigerant leakage processing of a photovoltaic direct-drive R290 air conditioner, the air conditioner has an outdoor unit, an indoor unit, and a refrigerant leakage processing device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit), and the outdoor unit and the refrigerant leakage processing device are both located on the outdoor side of the air conditioner. In the scheme of the application, as shown in Figure 3 The control device of the air conditioner comprises an acquisition unit 102 and a control unit 104.

[0111] The acquisition unit 102 is configured to acquire the refrigerant leakage signal of the air conditioner from the indoor unit at the refrigerant leakage processing device of the outdoor unit in the case of operation of the air conditioner or shutdown of the air conditioner, and acquire the working current of the refrigerant leakage processing device from one side of the outdoor unit at the refrigerant leakage processing device of the outdoor unit in the case of working of the refrigerant leakage processing device, wherein the refrigerant leakage signal of the air conditioner is the signals L, H and O, and the working current of the refrigerant leakage processing device is the current of the air pump. The specific functions and processes of the acquisition unit 102 are described in step S110.

[0112] The control unit 104 is configured to determine the type of the refrigerant leakage signal from one side of the outdoor unit at the refrigerant leakage processing device of the outdoor unit. The specific functions and processes of the control unit 104 are described in step S120.

[0113] The control unit 104 is further configured to, at the refrigerant leakage processing device of the outdoor unit, according to the type of the refrigerant leakage signal from the side of the outdoor unit, and in combination with the working current of the refrigerant leakage processing device, control at least one of the power-off of the outdoor unit, the on-off when not powered off and the operating parameter when powered on, the power-off of the indoor unit, the on-off when not powered off and the operating parameter when powered on, and the power-off of the refrigerant leakage processing device, the on-off when not powered off and the operating parameter when powered on, to perform the preset explosion-proof measure. The specific functions and processes of the control unit 104 are also described in step S130.

[0114] Specifically, the control device of the air conditioner provided by the scheme of the present application can preferably be applied to refrigerant leakage processing of a photovoltaic direct-drive R290 air conditioner. The air conditioner has an outdoor unit and an indoor unit. The outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), an outdoor fan, and a refrigerant leakage processing device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit). The indoor unit has an indoor fan and a deflector. In the scheme of the present application, the control device of the air conditioner comprises:

[0115] The acquisition unit 102 is further configured to, in the case of operation of the air conditioner or shutdown of the air conditioner, acquire, at the refrigerant leakage processing device of the outdoor unit, the refrigerant leakage signal of the air conditioner from the indoor unit; in the case of defrosting in the heating mode of the air conditioner, acquire, at the refrigerant leakage processing device of the outdoor unit, the discharge temperature of the compressor from the side of the outdoor unit; and in the case of working of the refrigerant leakage processing device, acquire, at the refrigerant leakage processing device of the outdoor unit, the working current of the refrigerant leakage processing device from the side of the outdoor unit; wherein the refrigerant leakage signal of the air conditioner is signal L, signal H and signal O, and the working current of the refrigerant leakage processing device is the current of the gas pump.

[0116] The control unit 104 is further configured to, at the refrigerant leakage processing device of the outdoor unit, determine the type of the refrigerant leakage signal from the side of the outdoor unit.

[0117] The control unit 104 is further configured to control at least one of the power-off of the compressor, the opening and closing of the compressor when not powered off and the frequency when turned on, the power-off of the throttling device, the opening degree of the throttling device when not powered off, the power-off of the outdoor fan, the opening and closing of the outdoor fan when not powered off and the rotating speed when turned on, the power-off of the refrigerant leakage treatment device, the opening and closing of the refrigerant leakage treatment device when not powered off and the operating parameter when turned on, the power-off of the indoor unit, the opening and closing of the indoor fan when the indoor unit is not powered off and the rotating speed when turned on, and the opening and closing of the air deflector when the indoor unit is not powered off, according to the type of the refrigerant leakage signal from one side of the outdoor unit, in combination with the working current of the refrigerant leakage treatment device, at the refrigerant leakage treatment device of the outdoor unit, to perform the preset explosion-proof measures.

[0118] The scheme of the present application provides a refrigerant leakage treatment scheme for a photovoltaic direct-drive R290 air conditioner. Without adding new air ducts and other complex structures, the R290 special leakage treatment mode can be realized by slightly modifying the existing air conditioner indoor unit drain pipe and cooperating with the related logic, the refrigerant leakage range is controlled in the air conditioner, the fire and explosion prevention of the air conditioner and the room is realized, and the safety of the user's property is ensured. In this way, under the condition that the air conditioner does not have a fresh air structure, the refrigerant leakage condition is treated by a certain control method and the photovoltaic air conditioner characteristics.

[0119] In some embodiments, the indoor unit further has a drain pipe in communication with the outlet of the water pan of the indoor unit; the refrigerant leakage treatment device comprises a power supply module, such as a power supply part in the power supply unit shown in the figure, and an exhaust module, such as an exhaust part in the exhaust unit shown in the figure. Figure 4 Figure 4 The exhaust module comprises a three-way switch and an air pump, and the three-way switch is, for example, a three-way electromagnetic valve.

[0120] The power supply module is configured to supply power to the three-way switch and the air pump. The three-way switch has a first end, a second end and a third end. The first end of the three-way switch is in communication with the air pump, the second end of the three-way switch is in communication with the drain pipe, and the third end of the three-way switch is in communication with the external atmosphere. When the three-way switch is turned on, the air pump is in communication with the drain pipe. When the three-way switch is turned off, the drain pipe is in communication with the external atmosphere.

[0121] In the scheme of the present application, the refrigerant leakage treatment device of the air conditioner is located on the outdoor side and is powered by photovoltaic power. Normally, it is not turned on, and only when the alkane sensor detects or calculates that the refrigerant leaks, the power supply is turned on. Figure 4 The structure diagram of the refrigerant leakage treatment device of the air conditioner. As shown in Figure 4 ​As shown, the air conditioner refrigerant leakage treatment device is composed of a controller, an air pump, a three-way valve (i.e. an electromagnetic three-way valve), an air pipe (i.e. a drain pipe) to form an exhaust unit, a temperature sensing bag and an alkane sensor, a controller to form a detection unit, a photovoltaic power supply, a relay, and a controller to form a power supply unit. The exhaust unit, the detection unit, and the power supply unit work together to complete the refrigerant leakage treatment.

[0122] In Figure 4 In the exhaust unit, the three-way valve has three ends, the first end of the three ends is connected to one end of the air pump, the second end is connected to the outlet of the indoor unit water pan, and the third end is connected to the outside world. The other end of the air pump is connected to the outside atmosphere. In the normally open state of the three-way valve, the air pump is in communication with the outlet of the indoor unit water pan. In the normally closed state of the three-way valve, the outlet of the indoor unit water pan is in communication with the outside world.

[0123] In the exhaust unit, the controller controls the three-way valve and the air pipe (drain pipe). In the detection unit, the temperature sensing bag is used to detect temperature, and the alkane sensor is used to detect the concentration of alkane gas. In the power supply unit, the relay is used to control the on-off of the photovoltaic power supply. In the scheme of the present application, the exhaust unit can accommodate photovoltaic power to ensure the safety of electricity use in the event of leakage.

[0124] In the scheme of the present application, by providing a refrigerant leakage treatment device on the outdoor side of the air conditioner, taking proactive explosion-proof measures in the event of air conditioner refrigerant leakage, protecting the safety of the user, and preventing dangerous situations,

[0125] In some embodiments, the type of the refrigerant leakage signal includes any one of the following types: a preset first leakage type, a preset second leakage type, and a preset third leakage type. The preset first leakage type is, for example, the type of signal L, the preset second leakage type is, for example, the type of signal H, and the preset third leakage type is, for example, the type of signal O.

[0126] The control unit 104 determines the type of the refrigerant leakage signal, including any one of the following determination cases:

[0127] The first determination case: the control unit 104 is specifically further configured to determine that the type of the refrigerant leakage signal is the preset first leakage type if it is determined that the air conditioner is running in any one of the cooling mode of the air conditioner and the dehumidification mode of the air conditioner.

[0128] The second determination case: the control unit 104 is specifically further configured to determine that the type of the refrigerant leakage signal is the preset second leakage type if it is determined that the air conditioner is running in any one of the heating mode of the air conditioner, the air supply mode of the air conditioner, and the drying mode of the air conditioner.

[0129] The third determination case: the control unit 104 is specifically further configured to, in a case of determining that the air conditioner defrosts in the heating mode of the air conditioner, determine the type of the refrigerant leakage signal as the preset second leakage type if it is determined that the discharge temperature of the compressor in the air conditioner is greater than a preset discharge temperature threshold, such as 60°C.

[0130] The fourth determination case: the control unit 104 is specifically further configured to, in a case of determining that the air conditioner is in a fault shutdown of the air conditioner or the indoor unit has started but the compressor in the air conditioner has not started, determine the type of the refrigerant leakage signal as the preset third leakage type.

[0131] The fifth determination case: the control unit 104 is specifically further configured to, in a case of determining that the air conditioner defrosts in the heating mode of the air conditioner, determine the type of the refrigerant leakage signal as the preset third leakage type if it is determined that the discharge temperature of the compressor in the air conditioner is less than or equal to a preset discharge temperature threshold.

[0132] Figure 5 The flowchart of the refrigerant leakage processing method of the air conditioner. As shown in Figure 5 The refrigerant leakage processing method of the air conditioner comprises:

[0133] Step 1: in a case of determining that the air conditioner leaks refrigerant, a refrigerant leakage signal is sent; after the refrigerant leakage signal is sent, it is determined whether the refrigerant leakage signal is signal L, signal H or signal O: if the refrigerant leakage signal is signal L, step 2 is executed, if the refrigerant leakage signal is signal H, step 3 is executed, and if the refrigerant leakage signal is signal O, step 4 is executed.

[0134] In step 1, when the system detects that the refrigerant leaks, the indoor unit sends a signal to the leakage processing system (i.e. sends a refrigerant leakage signal): in the case of air conditioning refrigeration, the refrigerant leakage signal is signal L, in the case of air conditioning heating, the refrigerant leakage signal is signal H, and in the case of air conditioning shutdown, the refrigerant leakage signal is signal O. When the above three signals are sent, the authority of the leakage system controller is superior to all control logics of the air conditioner, and the indoor unit and the outdoor unit are controlled by the leakage system controller.

[0135] In some schemes, the strategy adopted for R290 air conditioners is to use an alkane sensor to sense the concentration of R290 in indoor air to determine. The density of R290 is greater than the average density of air, so the system refrigerant leakage position of the air conditioner in the starting state is far away from the alkane sensor. Therefore, it will gradually settle to the lower layer of air with the air outlet (after cooling or heating blowing, it will gradually decrease to the lower layer of room air). Therefore, when the air conditioner determines that the indoor evaporator is leaking refrigerant at this time according to the alkane sensor or the refrigerant leakage detection method of the air conditioner proposed in the prior application with the application number 2024109843035 of the applicant, the various modes provided in the scheme of the present application are adopted to cope with it.

[0136] Among them, the system refrigerant leakage position of the air conditioner has the following three possible leakage positions: the first type is the joint of the system, such as the joint of the indoor unit and the outdoor unit with the corresponding connecting pipe; the second type is the pipe that has the possibility of long-term water immersion, such as the pipe with water accumulated in the indoor evaporator orthosis frame, the pipe with water accumulated in the outdoor unit chassis, etc.; the third type is the pipe with large stress and strain, such as the suction and exhaust ports and other positions.

[0137] In the scheme of the present application, the refrigerant leakage signal of the air conditioner in the cooling condition is signal L, and the refrigerant leakage signal of the air conditioner in the heating condition is signal H. The refrigerant leakage signal of the air conditioner in the shutdown state is signal O.

[0138] In the dehumidification mode of the air conditioner, signal L is sent to the outdoor unit. In the air supply mode of the air conditioner, signal H is sent to the outdoor unit. In the drying mode of the air conditioner, signal H is sent to the outdoor unit. When the air conditioner is in fault shutdown and the indoor unit displays a fault code, or when the indoor unit has started and the compressor has not started, signal O is sent to the outdoor unit.

[0139] During the heating defrosting process, the discharge temperature of the compressor is less than or equal to 60℃, and signal O is sent to the outdoor unit. Because the high and low pressure difference will become smaller, the indoor and outdoor units no longer need to be depressurized, and can be directly powered off; otherwise, signal L is sent to the outdoor unit.

[0140] In the scheme of the present application, after detecting the refrigerant leakage in the indoor unit, a refrigerant leakage signal is sent to the refrigerant leakage processing device on the outdoor side. The type of the refrigerant leakage signal matches the current state of the air conditioner, so that the refrigerant leakage processing device on the outdoor side executes corresponding explosion-proof measures according to the type of the refrigerant leakage signal, and improves the safety.

[0141] In some embodiments, the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), and an outdoor fan; the indoor unit has an indoor fan and a deflector.

[0142] The control unit 104 controls at least one of the power-off of the outdoor unit, the on-off and the operating parameter when the outdoor unit is not powered off, the power-off of the indoor unit, the on-off and the operating parameter when the indoor unit is not powered off, and the power-off of the refrigerant leakage treatment device, the on-off and the operating parameter when the refrigerant leakage treatment device is not powered off, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, to execute the preset explosion prevention measures, including: controlling at least one of the power-off of the compressor, the on-off and the frequency when the compressor is not powered off, the power-off of the throttling device, the opening degree when the throttling device is not powered off, the power-off of the outdoor fan, the on-off and the rotating speed when the outdoor fan is not powered off, the power-off of the refrigerant leakage treatment device, the on-off and the operating parameter when the refrigerant leakage treatment device is not powered off, the power-off of the indoor unit, the rotating speed of the indoor fan when the indoor fan is not powered off, and the on-off of the air deflector when the indoor fan is not powered off, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, to execute the preset explosion prevention measures, specifically as follows:

[0143] The control unit 104 is specifically further configured to, in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, control the compressor to keep on and control the frequency of the compressor to decrease at a preset first rate to a preset frequency, and then control the compressor to stop and power off; wherein the preset first rate is, for example, a speed of 3 Hz / s, and the preset frequency is, for example, 30 Hz. The specific functions and processes of the control unit 104 are also described with reference to step S210.

[0144] The control unit 104 is specifically further configured to, in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, control the opening degree of the throttling device to keep the current value during the period of controlling the frequency of the compressor to decrease at the preset first rate, and then control the opening degree of the throttling device to decrease at a preset second rate until the opening degree of the throttling device is 0 after controlling the compressor to stop and power off; wherein the preset first rate is, for example, a speed of 50 b / s. The specific functions and processes of the control unit 104 are also described with reference to step S220.

[0145] The control unit 104 is specifically further configured to, in a case where it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, control the on-off and the rotating speed of the indoor fan when the indoor fan is on according to the type of the refrigerant leakage signal, and control the on-off of the air deflector. The specific functions and processes of the control unit 104 are also described with reference to step S230.

[0146] The control unit 104 is further configured to, in the case that the type of the refrigerant leakage signal is determined to be the preset first leakage type or the preset second leakage type, control the on-off and the rotating speed at the start of the outdoor fan according to the type of the refrigerant leakage signal. The specific functions and processes of the control unit 104 are also described in step S240.

[0147] The control unit 104 is further configured to, in the case that the type of the refrigerant leakage signal is determined to be the preset first leakage type or the preset second leakage type, control the on-off and the rotating speed at the start of the outdoor fan according to the type of the refrigerant leakage signal. The specific functions and processes of the control unit 104 are also described in step S240.

[0148] In the scheme of the present application, in the case of refrigerant leakage treatment in air conditioning refrigeration: the first detection part is divided into alkane concentration detection and system leakage detection. Since it is determined that leakage occurs, the compressor is first reduced in frequency and then turned off. The purpose of this treatment is to prevent the system pressure from fluctuating sharply due to sudden power-off of the compressor at high frequency, because the system has a rupture, and a huge pressure change may further cause the rupture to worsen. At the same time, during the compressor frequency reduction, the electronic expansion valve opening is maintained at the opening of the previous second. After the compressor is turned off, the electronic expansion valve is reset to be closed to have no flow (specifically, an electronic expansion valve with no flow at valve closure is used), the indoor fan is turned off, the air deflector is turned off, and finally the outdoor fan is turned off. In the scheme of the present application, the significance of setting the closing sequence of each component in the case of refrigerant leakage treatment in air conditioning refrigeration is that: first, the compressor is turned off to reduce the maximum system pressure, the electronic expansion valve is closed to limit the flow of refrigerant to a certain extent, the indoor fan is turned off to prevent refrigerant from flowing further to the indoor side, and the air deflector is also turned off (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air deflector can reduce the leakage amount).

[0149] In the case of air conditioning refrigeration operation, the remote control signal is invalid after the refrigerant leakage treatment signal is issued; the indoor unit is immediately powered off after the refrigerant leakage treatment is completed, which is to further reduce the safety hazards, including the safety hazards of customer's own misoperation. In the scheme of the present application, the exhaust action is directly performed at the same time as the refrigerant leakage signal is issued; if leakage is found in the air conditioning stop state, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from sparking, and the outdoor side starts the air pump to exhaust air.

[0150] In the scheme of the present application, when refrigerant leakage treatment is performed in the case of air conditioning heating: firstly, the detection part is divided into alkane concentration detection and system leakage detection, and the compressor is first reduced in frequency and then turned off due to the determination of leakage, and the purpose of the treatment is to prevent the system pressure from fluctuating sharply due to sudden power-off of the compressor at high frequency, because the system has a rupture, and a huge pressure change may further cause the rupture to worsen; at the same time, during the compressor frequency reduction, the electronic expansion valve opening is maintained at the opening of the previous second; after the compressor is stopped, the electronic expansion valve is reset to close the flow (specifically, an electronic expansion valve with closed flow is used); the indoor fan speed is kept unchanged, the air deflector is closed, and the outdoor fan is reduced to the lowest wind during the compressor frequency reduction, and the outdoor fan is turned off after the compressor is stopped. The significance of setting the closing sequence of each component in the scheme of the present application when refrigerant leakage treatment is performed in the case of air conditioning heating is that: firstly, the compressor is stopped to reduce the maximum system pressure, the electronic expansion valve is closed to limit the flow of refrigerant to a certain extent, the indoor fan is closed to prevent refrigerant from flowing further to the indoor side, and the air deflector is also closed (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air deflector can reduce the leakage amount).

[0151] In the case of air conditioning heating operation, the remote control signal is invalid after the refrigerant leakage treatment signal is issued; the indoor unit is powered off immediately after the refrigerant leakage treatment is completed, and the purpose is to further reduce the safety hidden danger, including the safety hidden danger of customer's own misoperation. In the scheme of the present application, the exhaust action is directly performed when the refrigerant leakage signal is issued; if leakage is found in the air conditioning stopped state, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from sparking, and the outdoor side starts the air pump to exhaust.

[0152] In some embodiments, the control unit 104, in the case of determining that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, controls the start-stop and the speed at start of the indoor fan according to the type of the refrigerant leakage signal, and controls the start-stop of the air deflector, including any of the following indoor side control cases:

[0153] The first indoor side control case: the control unit 104 is specifically further configured to, in the case of determining that the type of the refrigerant leakage signal is the preset first leakage type, control the speed of the indoor fan to start to decrease while controlling the frequency of the compressor to decrease at a preset first rate, and control the air deflector to start to close; and after controlling the compressor to stop and power off, control the indoor fan to stop and power off.

[0154] The second indoor side control case: the control unit 104 is specifically further configured to, in a case where it is determined that the type of the refrigerant leakage signal is a preset second leakage type, control the rotation speed of the indoor fan to start maintaining a current value while controlling the frequency of the compressor to decrease at a preset first rate; control the air deflector to start closing while controlling the compressor to stop and power off; and control the indoor fan to stop and power off after controlling the compressor to stop and power off.

[0155] In the scheme of the present application, in a case where it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, the opening and closing of the indoor fan and the rotation speed of the indoor fan at the time of opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air deflector are controlled, the operation of the indoor electrical appliance is stopped and powered on again, electric sparks are prevented from being generated indoors, and safety is improved.

[0156] In some embodiments, the control unit 104, in a case where it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, controls the opening and closing of the outdoor fan and the rotation speed of the outdoor fan at the time of opening according to the type of the refrigerant leakage signal, and controls whether the refrigerant leakage treatment device is powered off or not, the opening and closing of the refrigerant leakage treatment device when not powered off, and the operating parameters of the refrigerant leakage treatment device at the time of opening, including any one of the following outdoor side control cases:

[0157] The first outdoor side control case: the control unit 104 is specifically further configured to, in a case where it is determined that the type of the refrigerant leakage signal is a preset first leakage type, control the rotation speed of the outdoor fan to maintain a current value during the period when the frequency of the compressor is controlled to decrease at a preset first rate; control the rotation speed of the outdoor fan to rise until the rotation speed of the outdoor fan reaches a preset maximum fan rotation speed, while controlling the opening degree of the throttling device to close, and then control the rotation speed of the outdoor fan to maintain a current value; and control the outdoor fan to stop and power off when the opening degree of the throttling device is controlled to close to 0.

[0158] The second outdoor side control case: the control unit 104 is further configured to, in a case where it is determined that the type of the refrigerant leakage signal is a preset second leakage type, control the rotation speed of the outdoor fan to maintain a new current value after starting to decrease by a first set proportion based on the current value of the rotation speed of the outdoor fan (specifically, control the rotation speed of the outdoor fan to maintain a new current value of the rotation speed of the outdoor fan after starting to decrease by the first set proportion based on the current value of the rotation speed of the outdoor fan) during the period of controlling the frequency of the compressor to decrease at a preset first rate; control the rotation speed of the outdoor fan to increase until the rotation speed of the outdoor fan continues to decrease to a preset minimum fan rotation speed while controlling the opening degree of the throttling device to be small, and then control the rotation speed of the outdoor fan to maintain the current value; and control the outdoor fan to stop and power off when the opening degree of the throttling device is controlled to be small to 0; wherein the first set proportion is, for example, 30%.

[0159] In a case where it is determined that the type of the refrigerant leakage signal is a preset second leakage type, the control unit 104 is further configured to, in a heating mode of the air conditioner and in a case where an electric auxiliary heating device of the air conditioner is turned on, control the electric auxiliary heating device to be turned off and powered off; in the scheme of the present application, in the heating mode of the air conditioner, when the outdoor unit receives an H signal, the electric auxiliary heating device is powered off even if it is turned on.

[0160] In a case where it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, the control unit 104 controls the start and stop and the rotation speed at start of the outdoor fan according to the type of the refrigerant leakage signal, and controls whether the refrigerant leakage treatment device is powered off, the start and stop, and the operating parameter at start of the refrigerant leakage treatment device when it is not powered off, to start the outdoor electrical appliance, reduce the cumulative amount of indoor refrigerant, and improve safety.

[0161] In some embodiments, in a case where the refrigerant leakage treatment device comprises a three-way switch and a gas pump, the operating parameter of the refrigerant leakage treatment device comprises the rotation speed of the gas pump and the working current of the refrigerant leakage treatment device, which comprises the working current of the gas pump.

[0162] In a case where it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, the control unit 104 controls whether the refrigerant leakage treatment device is powered off, the start and stop, and the operating parameter at start of the refrigerant leakage treatment device when it is not powered off according to the type of the refrigerant leakage signal and the working current of the refrigerant leakage treatment device in the case of the preset first leakage type, including any one of the following outdoor side refrigerant leakage treatment cases:

[0163] The first outdoor side refrigerant leakage processing case: the control unit 104 is specifically further configured to control the three-way switch to open and control the air pump to start while controlling the frequency of the compressor to decrease at a preset first rate; after the air pump starts, control the air pump to rotate at a preset highest pump rotating speed for a first preset time length, then control the rotating speed of the air pump to decrease to a second set proportion of the preset highest pump rotating speed for a second preset time length, and then control the rotating speed of the air pump to increase to the preset highest pump rotating speed for a third preset time length; then, in the case that the air pump rotates at the preset highest pump rotating speed, if the difference between the average current of the air pump in each operating cycle in a set time interval is not more than a set error, control the rotating speed of the air pump to decrease to a third set proportion of the preset highest pump rotating speed and maintain the current value for air exhaust processing until manual operation; wherein the third set proportion is greater than the second set proportion, for example, the second set proportion is 50%, the third set proportion is 70%, the first preset time length is 15s, the second preset time length is 10s, and the third preset time length is 15s.

[0164] The second outdoor side refrigerant leakage processing case: the control unit 104 is specifically further configured to control the three-way switch to open and control the air pump to start while controlling the frequency of the compressor to decrease at a preset first rate; after the air pump starts, control the rotating speed of the air pump to decrease to a third set proportion of the preset highest pump rotating speed and maintain the current value for air exhaust processing until manual operation. Wherein the third set proportion is for example 70%.

[0165] In the scheme of the application, in the case that the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, according to the type of the refrigerant leakage signal, and in the case of the preset first leakage type, whether the refrigerant leakage processing device is powered off, the on-off in the case of not being powered off, and the operating parameter in the case of being powered on are controlled in combination with the working current of the refrigerant leakage processing device, the indoor refrigerant cumulative amount is further reduced, and the safety is improved.

[0166] As shown in Figure 5 The refrigerant leakage processing method of the air conditioner further includes: step 2, when the signal L is sent, the leakage processing system obtains the highest operating permission: first, the frequency of the compressor is decreased to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off; during the frequency reduction of the compressor, the opening degree of the electronic expansion valve is unchanged (for example, the opening degree of the electronic expansion valve is maintained to be the opening degree one second before the frequency reduction), and after the compressor is stopped, the opening degree of the electronic expansion valve is closed at a speed of 50b / s, and the opening degree of the electronic expansion valve is closed until the opening degree is reset to 0.

[0167] In step 2, the indoor fan starts to reduce the rotating speed at the same time when the compressor starts to reduce the frequency; the indoor fan is powered off when the compressor is powered off, and the air deflector starts to close at the same time when the compressor starts to reduce the frequency.

[0168] Figure 6 The leakage treatment timing chart after the refrigerant leakage during the air conditioning cooling. In step 2, as shown in the specific timing chart Figure 6 , the rotating speed of the outdoor fan is unchanged during the compressor frequency reduction; when the opening of the electronic expansion valve is closed, the rotating speed of the outdoor fan rises until the highest rotating speed; the outdoor fan is powered off after the electronic expansion valve is completely closed; the three-way valve is opened synchronously with the compressor frequency reduction, and the air pump is operated synchronously with the compressor frequency reduction.

[0169] In Figure 4 , the air pump rotates at the highest rotating speed for 15 s, is reduced to 50% of the highest rotating speed for 10 s, and then is raised to the highest rotating speed for 15 s during the drainage action of the three-way valve in the open state, and the current of the air pump is detected during the period.

[0170] When the average current of the air pump during the highest rotating speed operation period appears two periods of 5 s, and the current difference is not more than 5%, it is judged that the water has been drained, the rotating speed of the air pump can be reduced to 70% of the highest rotating speed and kept unchanged, until the after-sales personnel come to the treatment, manually turn off the outdoor unit treatment system (such as the exhaust unit) on the outside, and the specific timing chart is shown in Figure 6 .

[0171] As shown in Figure 5 , the refrigerant leakage treatment method of the air conditioner further comprises: step 3, when the signal H is issued, the leakage treatment system obtains the highest operation permission: first, the compressor frequency is reduced to 30 Hz at a speed of 3 Hz / s, and then the compressor is directly powered off, the opening of the electronic expansion valve is unchanged during the compressor frequency reduction (such as the opening of the electronic expansion valve is maintained at the opening of the last second before the frequency reduction), and the opening of the electronic expansion valve is closed at a speed of 50 b / s after the compressor is powered off, and the opening of the electronic expansion valve is closed until the opening is reset to 0.

[0172] In step 3, the rotating speed of the indoor fan starts to be unchanged at the same time when the compressor starts to reduce the frequency; the indoor fan is powered off when the compressor is powered off, and the air deflector starts to close at the same time when the compressor is powered off.

[0173] Figure 7 The leakage treatment timing chart after the refrigerant leakage during the air conditioning cooling. In step 2, as shown in the specific timing chart Figure 6 , the rotating speed of the outdoor fan is unchanged during the compressor frequency reduction; when the opening of the electronic expansion valve is closed, the rotating speed of the outdoor fan rises until the highest rotating speed; the outdoor fan is powered off after the electronic expansion valve is completely closed; the three-way valve is opened synchronously with the compressor frequency reduction, and the air pump is operated synchronously with the compressor frequency reduction.

[0174] In Figure 4 The exhaust unit shown in the figure, three-way valve open state exhaust action, air pump speed is the highest speed of 70% and remains constant, until there is a service personnel to deal with, manually closed outside the outdoor unit processing system, see, for example Figure 7 The timing chart shown.

[0175] In the scheme of the present application, the system is found after the leakage of indoor electrical appliances and power again, start outdoor electrical appliances work, prevent indoor electric spark, danger, improve safety.

[0176] In some embodiments, the type of refrigerant leakage signal is a third predetermined leakage type; in the case of the refrigerant leakage treatment device comprising a three-way switch and an air pump, the operating parameters of the refrigerant leakage treatment device include the speed of the air pump.

[0177] The control unit 104 controls at least one of the following according to the type of refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device to perform the predetermined explosion-proof measure: whether the outdoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, whether the indoor unit is powered off, the start-stop when not powered off and the operating parameter when turned on, and whether the refrigerant leakage treatment device is powered off, the start-stop when not powered off and the operating parameter when turned on, including: according to the type of refrigerant leakage signal and in combination with the working current of the refrigerant leakage treatment device, control at least one of the following to perform the predetermined explosion-proof measure: whether the compressor is powered off, the start-stop when not powered off and the frequency when turned on, whether the throttling device is powered off, the opening degree when not powered off, whether the outdoor fan is powered off, the start-stop when not powered off and the speed when turned on, the operating parameter of the refrigerant leakage treatment device when not powered off, the start-stop of the indoor fan when not powered off and the speed when turned on, and the opening degree of the damper when not powered off.

[0178] The control unit 104 is specifically further configured to control the indoor unit to be powered off, control the three-way switch to be opened, and control the air pump to be opened when it is determined that the type of refrigerant leakage signal is a third predetermined leakage type; after the air pump is opened, the speed of the air pump is reduced to a third set proportion of the highest pump speed and maintained at the current value for exhaust treatment until manual control. The third set proportion is, for example, 70%.

[0179] As Figure 5As shown, the air conditioner refrigerant leakage processing method further comprises: step 4, in the shutdown state, it is detected that: when the signal O is sent, the indoor unit is powered off, the outdoor unit leakage system runs the same as heating. The three-way valve is opened, the three-way valve is always open, the air pump is communicated with the indoor unit water pan outlet; the three-way valve is always closed, the indoor unit water pan outlet is communicated with the outside, the exhaust action is performed, the air pump speed is 70% of the highest speed and remains constant, until the after-sales personnel come to the processing, manually close the outdoor unit processing system on the outside, which can be seen from Figure 7 As shown in the timing diagram.

[0180] In the scheme of the application, after discovering system leakage through the exhaust unit, active explosion prevention measures are taken to protect the safety of the user and prevent accidents from occurring, solving the safety problem of air conditioner fire and explosion prevention after R290 air conditioner refrigerant leakage.

[0181] Since the processing and functions realized by the device of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the method, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, which will not be repeated here.

[0182] According to the embodiment of the application, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner can comprise the control device of the air conditioner described above.

[0183] Since the processing and functions realized by the air conditioner of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the device, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, which will not be repeated here.

[0184] According to the embodiment of the application, a computer program product corresponding to the control method of the air conditioner is also provided, comprising a computer program, which realizes the steps of the control method of the air conditioner described above when executed by a processor.

[0185] Since the processing and functions realized by the product of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the method, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, which will not be repeated here.

[0186] According to the embodiment of the application, a storage medium corresponding to the control method of the air conditioner is also provided, comprising a stored program, wherein when the program runs, the device where the storage medium is located executes the steps of the control method of the air conditioner described above.

[0187] Since the processing and functions realized by the storage medium of the embodiment are basically corresponding to the foregoing embodiments, principles and examples of the method, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, which will not be repeated here.

[0188] In summary, the person skilled in the art can easily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0189] The above merely provides an example of the present application, but should not be used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that, The air conditioner has an outdoor section and an indoor section. The outdoor section includes an outdoor unit and a refrigerant leak handling device, and the indoor section includes an indoor unit. The indoor unit also has a drain pipe. The refrigerant leak handling device includes a power supply module and an exhaust module. The exhaust module includes a three-way switch and an air pump. The power supply module supplies power to the three-way switch and the air pump. When the three-way switch is open, the air pump is connected to the drain pipe. When the three-way switch is closed, the drain pipe is connected to the outside atmosphere. The air conditioner control method includes: Acquire a refrigerant leak signal from the air conditioner; and, when the refrigerant leak handling device is operating, acquire the operating current of the refrigerant leak handling device; the operating current of the refrigerant leak handling device includes: the operating current of the air pump; Determine the type of the refrigerant leak signal; Based on the type of refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, its opening and closing parameters when powered on, and its operating parameters when the indoor unit is powered off, its opening and closing parameters when powered on, and its operating parameters when the refrigerant leak handling device is powered off, its opening and closing parameters when powered on.

2. The air conditioning control method according to claim 1, characterized in that, The drain pipe is connected to the water tray outlet of the indoor unit; The three-way switch has a first end, a second end, and a third end. The first end of the three-way switch is connected to the air pump, the second end of the three-way switch is connected to the drain pipe, and the third end of the three-way switch is connected to the outside atmosphere.

3. The air conditioning control method according to claim 1 or 2, characterized in that, The type of refrigerant leakage signal includes any of the following: a preset first leakage type, a preset second leakage type, and a preset third leakage type; Determining the type of the refrigerant leak signal includes: If it is determined that the air conditioner is operating in either the air conditioner's cooling mode or the air conditioner's dehumidification mode, then the type of the refrigerant leakage signal is determined to be the preset first leakage type. If it is determined that the air conditioner is operating in any one of the air conditioner's heating mode, air supply mode, and drying mode, then the type of the refrigerant leakage signal is determined to be the preset second leakage type. If it is determined that the air conditioner is defrosting in the air conditioner's heating mode, and if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than a preset exhaust temperature threshold, then the type of the refrigerant leakage signal is determined to be the preset second leakage type. If it is determined that the air conditioner is in a fault shutdown state or the indoor unit has started but the compressor in the air conditioner has not started, then the type of the refrigerant leakage signal is determined to be the preset third leakage type; If it is determined that the air conditioner is defrosting in the heating mode, and if it is determined that the exhaust temperature of the compressor in the air conditioner is less than or equal to a preset exhaust temperature threshold, then the type of the refrigerant leakage signal is determined to be the preset third leakage type.

4. The air conditioning control method according to claim 1 or 2, characterized in that, The type of the refrigerant leakage signal is either a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device, and an outdoor fan; the indoor unit has an indoor fan and an air guide plate; Based on the type of refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, its start-up and shutdown parameters when powered on, its operating parameters when the indoor unit is powered off, its start-up and shutdown parameters when the indoor unit is powered off, and its operating parameters when the refrigerant leak handling device is powered off, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered off, its start-up and shutdown parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered on, including: If the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, the compressor is controlled to remain running and the compressor frequency is controlled to decrease to a preset frequency at a preset first rate, and then the compressor is controlled to stop and the power is cut off. If the refrigerant leakage signal is determined to be of a preset first leakage type or a preset second leakage type, while the compressor frequency is controlled to decrease at a preset first rate, the opening of the throttling device is controlled to remain at its current value; after the compressor is stopped and the power is cut off, the opening of the throttling device is controlled to decrease at a preset second rate until the opening of the throttling device is 0. If the type of the refrigerant leakage signal is determined to be either a preset first leakage type or a preset second leakage type, the opening and closing of the indoor fan and its rotation speed during opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are also controlled. If the type of the refrigerant leakage signal is determined to be either a preset first leakage type or a preset second leakage type, the start-up and shutdown of the outdoor fan and its rotation speed during startup are controlled according to the type of the refrigerant leakage signal. If the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, the refrigerant leakage handling device is controlled according to the type of the refrigerant leakage signal and, under the preset first leakage type, in conjunction with the operating current of the refrigerant leakage handling device, whether the refrigerant leakage handling device is powered off, its opening and closing when not powered off, and its operating parameters when it is turned on.

5. The air conditioning control method according to claim 3, characterized in that, The type of the refrigerant leakage signal is either a preset first leakage type or a preset second leakage type; the outdoor unit has a compressor, a throttling device, and an outdoor fan; the indoor unit has an indoor fan and an air guide plate; Based on the type of refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, its start-up and shutdown parameters when powered on, its operating parameters when the indoor unit is powered off, its start-up and shutdown parameters when the indoor unit is powered off, and its operating parameters when the refrigerant leak handling device is powered off, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered off, its start-up and shutdown parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, its start-up and shutdown parameters when the indoor unit is powered on, its start-up and shutdown parameters when the indoor unit is powered on, including: If the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, the compressor is controlled to remain running and the compressor frequency is controlled to decrease to a preset frequency at a preset first rate, and then the compressor is controlled to stop and the power is cut off. If the refrigerant leakage signal is determined to be of a preset first leakage type or a preset second leakage type, while the compressor frequency is controlled to decrease at a preset first rate, the opening of the throttling device is controlled to remain at its current value; after the compressor is stopped and the power is cut off, the opening of the throttling device is controlled to decrease at a preset second rate until the opening of the throttling device is 0. If the type of the refrigerant leakage signal is determined to be either a preset first leakage type or a preset second leakage type, the opening and closing of the indoor fan and its rotation speed during opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are also controlled. If the type of the refrigerant leakage signal is determined to be either a preset first leakage type or a preset second leakage type, the start-up and shutdown of the outdoor fan and its rotation speed during startup are controlled according to the type of the refrigerant leakage signal. If the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type, the refrigerant leakage handling device is controlled according to the type of the refrigerant leakage signal and, under the preset first leakage type, in conjunction with the operating current of the refrigerant leakage handling device, whether the refrigerant leakage handling device is powered off, its opening and closing when not powered off, and its operating parameters when it is turned on.

6. The air conditioning control method according to claim 4, characterized in that, in, If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, the operation of the indoor fan, including its on / off state and rotation speed during operation, is controlled according to the type of the refrigerant leak signal, and the opening and closing of the air guide plate is also controlled, including: If the type of the refrigerant leakage signal is determined to be a preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the indoor fan is controlled to decrease, and the air guide plate is controlled to close; and after controlling the compressor to stop and power off, the indoor fan is controlled to stop and power off. If the type of the refrigerant leakage signal is determined to be a preset second leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the indoor fan is controlled to maintain the current value; while controlling the compressor to stop and power off, the air guide plate is controlled to start closing; and after controlling the compressor to stop and power off, the indoor fan is controlled to stop and power off. And / or, If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, the outdoor fan is controlled to start / stop and rotate at startup according to the type of the refrigerant leak signal. The operating parameters of the refrigerant leak handling device are also controlled, including whether it is powered off, its start / stop when powered on, and its startup parameters. If the type of the refrigerant leakage signal is determined to be a preset first leakage type, while the frequency of the compressor is controlled to decrease at a preset first rate, the speed of the outdoor fan is controlled to remain at the current value; while the opening of the throttling device is controlled to decrease, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan reaches a preset maximum fan speed, and then the speed of the outdoor fan is controlled to remain at the current value; and when the opening of the throttling device is controlled to decrease to 0, the outdoor fan is controlled to stop and the power is cut off. If the refrigerant leakage signal is determined to be a preset second leakage type, during the period when the frequency of the compressor is controlled to decrease at a preset first rate, the speed of the outdoor fan is controlled to decrease by a first preset percentage based on the current value of the outdoor fan speed and then maintain the new current value; while controlling the opening of the throttling device to close, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan continues to decrease to a preset minimum fan speed, and then the speed of the outdoor fan is controlled to maintain the current value; and when the opening of the throttling device is controlled to close to 0, the outdoor fan is controlled to stop and the power is cut off. Specifically, if the type of the refrigerant leakage signal is determined to be a preset second leakage type, and the air conditioner is in heating mode and the electric auxiliary heating device is turned on, the electric auxiliary heating device is controlled to be turned off and the power is cut off. And / or, When the refrigerant leak handling device includes a three-way switch and an air pump, the operating parameters of the refrigerant leak handling device include: the rotational speed of the air pump; If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, based on the type of the refrigerant leak signal and, under the preset first leak type, in conjunction with the operating current of the refrigerant leak handling device, the power-off status of the refrigerant leak handling device, its on / off status when not powered off, and its operating parameters when on, are controlled, including: While controlling the compressor frequency to decrease at a preset first rate, the three-way switch is opened, and the air pump is turned on. After the air pump is turned on, it is controlled to rotate at a preset maximum pump speed for a first preset time, then the air pump speed is controlled to decrease to a second preset proportion of the preset maximum pump speed for a second preset time, and then the air pump speed is controlled to increase to a preset maximum pump speed for a third preset time. After that, while the air pump is running at the preset maximum pump speed, if the difference between the average current of the air pump in two operating cycles within a set time interval does not exceed a set error, the air pump speed is controlled to decrease to a third preset proportion of the preset maximum pump speed and then maintained at the current value for exhaust processing. The third preset proportion is greater than the second preset proportion. While controlling the frequency of the compressor to decrease at a preset first rate, the three-way switch is opened and the air pump is turned on; after the air pump is turned on, the speed of the air pump is reduced to a preset third set ratio of the maximum pump speed and then maintained at the current value for exhaust processing.

7. The air conditioning control method according to claim 5, characterized in that, in, If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, the operation of the indoor fan, including its on / off state and rotation speed during operation, is controlled according to the type of the refrigerant leak signal, and the opening and closing of the air guide plate is also controlled, including: If the type of the refrigerant leakage signal is determined to be a preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the indoor fan is controlled to decrease, and the air guide plate is controlled to close; and after controlling the compressor to stop and power off, the indoor fan is controlled to stop and power off. If the type of the refrigerant leakage signal is determined to be a preset second leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the indoor fan is controlled to maintain the current value; while controlling the compressor to stop and power off, the air guide plate is controlled to start closing; and after controlling the compressor to stop and power off, the indoor fan is controlled to stop and power off. And / or, If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, the outdoor fan is controlled to start / stop and rotate at startup according to the type of the refrigerant leak signal. The operating parameters of the refrigerant leak handling device are also controlled, including whether it is powered off, its start / stop when powered on, and its startup parameters. If the type of the refrigerant leakage signal is determined to be a preset first leakage type, while the frequency of the compressor is controlled to decrease at a preset first rate, the speed of the outdoor fan is controlled to remain at the current value; while the opening of the throttling device is controlled to decrease, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan reaches a preset maximum fan speed, and then the speed of the outdoor fan is controlled to remain at the current value; and when the opening of the throttling device is controlled to decrease to 0, the outdoor fan is controlled to stop and the power is cut off. If the refrigerant leakage signal is determined to be a preset second leakage type, during the period when the frequency of the compressor is controlled to decrease at a preset first rate, the speed of the outdoor fan is controlled to decrease by a first preset percentage based on the current value of the outdoor fan speed and then maintain the new current value; while controlling the opening of the throttling device to close, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan continues to decrease to a preset minimum fan speed, and then the speed of the outdoor fan is controlled to maintain the current value; and when the opening of the throttling device is controlled to close to 0, the outdoor fan is controlled to stop and the power is cut off. Specifically, if the type of the refrigerant leakage signal is determined to be a preset second leakage type, and the air conditioner is in heating mode and the electric auxiliary heating device is turned on, the electric auxiliary heating device is controlled to be turned off and the power is cut off. And / or, When the refrigerant leak handling device includes a three-way switch and an air pump, the operating parameters of the refrigerant leak handling device include: the rotational speed of the air pump; If the type of the refrigerant leak signal is determined to be a preset first leak type or a preset second leak type, based on the type of the refrigerant leak signal and, under the preset first leak type, in conjunction with the operating current of the refrigerant leak handling device, the power-off status of the refrigerant leak handling device, its on / off status when not powered off, and its operating parameters when on, are controlled, including: While controlling the compressor frequency to decrease at a preset first rate, the three-way switch is opened, and the air pump is turned on. After the air pump is turned on, it is controlled to rotate at a preset maximum pump speed for a first preset time, then the air pump speed is controlled to decrease to a second preset proportion of the preset maximum pump speed for a second preset time, and then the air pump speed is controlled to increase to a preset maximum pump speed for a third preset time. After that, while the air pump is running at the preset maximum pump speed, if the difference between the average current of the air pump in two operating cycles within a set time interval does not exceed a set error, the air pump speed is controlled to decrease to a third preset proportion of the preset maximum pump speed and then maintained at the current value for exhaust processing. The third preset proportion is greater than the second preset proportion. While controlling the frequency of the compressor to decrease at a preset first rate, the three-way switch is opened and the air pump is turned on; after the air pump is turned on, the speed of the air pump is reduced to a preset third set ratio of the maximum pump speed and then maintained at the current value for exhaust processing.

8. The air conditioning control method according to claim 1 or 2, characterized in that, The type of the refrigerant leak signal is a preset third type of leak; when the refrigerant leak handling device includes a three-way switch and an air pump, the operating parameters of the refrigerant leak handling device include: the rotational speed of the air pump; Based on the type of refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, its opening and closing parameters when powered on, and its operating parameters when the indoor unit is powered off, its opening and closing parameters when the indoor unit is powered off, and its operating parameters when the refrigerant leak handling device is powered off, its opening and closing parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, its opening and closing parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, and its operating parameters when the refrigerant leak handling device ... further including: If the refrigerant leakage signal is determined to be of the preset third leakage type, the indoor unit is powered off, the three-way switch is turned on, and the air pump is turned on. After the air pump is turned on, the speed of the air pump is reduced to the third preset ratio of the maximum pump speed and then maintained at the current value for exhaust processing.

9. The air conditioning control method according to claim 3, characterized in that, The type of the refrigerant leak signal is a preset third type of leak; when the refrigerant leak handling device includes a three-way switch and an air pump, the operating parameters of the refrigerant leak handling device include: the rotational speed of the air pump; Based on the type of refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, its opening and closing parameters when powered on, and its operating parameters when the indoor unit is powered off, its opening and closing parameters when the indoor unit is powered off, and its operating parameters when the refrigerant leak handling device is powered off, its opening and closing parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, its opening and closing parameters when the indoor unit is powered on, and its operating parameters when the refrigerant leak handling device is powered off, and its operating parameters when the refrigerant leak handling device ... further including: If the refrigerant leakage signal is determined to be of the preset third leakage type, the indoor unit is powered off, the three-way switch is turned on, and the air pump is turned on. After the air pump is turned on, the speed of the air pump is reduced to the third preset ratio of the maximum pump speed and then maintained at the current value for exhaust processing.

10. A control device for an air conditioner that uses the air conditioner control method as described in claim 1 to achieve air conditioner control, characterized in that, The air conditioner has an outdoor section and an indoor section. The outdoor section includes an outdoor unit and a refrigerant leak handling device, and the indoor section includes an indoor unit. The control device for the air conditioner includes: The acquisition unit is configured to acquire a refrigerant leakage signal from the air conditioner; and, when the refrigerant leakage handling device is in operation, acquire the operating current of the refrigerant leakage handling device. The control unit is configured to determine the type of the refrigerant leak signal; The control unit is further configured to control at least one of the following, based on the type of the refrigerant leak signal and in conjunction with the operating current of the refrigerant leak handling device, to perform preset explosion-proof measures: whether the outdoor unit is powered off, its start-up and shutdown parameters when powered on, its operating parameters when the indoor unit is powered off, its start-up and shutdown parameters when powered on, and its operating parameters when the refrigerant leak handling device is powered off, its start-up and shutdown parameters when powered on.

11. An air conditioner, characterized in that, include: The air conditioner control device as described in claim 10.

12. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the air conditioning control method according to any one of claims 1 to 9.

13. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the air conditioning control method according to any one of claims 1 to 9.

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