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

Abstract

The invention discloses an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product. The method comprises the steps that a refrigerant leakage signal of the air conditioner is obtained; under the condition that the refrigerant leakage processing device works, the working current of the refrigerant leakage processing device is obtained; 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, at least one of the following measures is controlled to execute preset anti-explosion measures: whether the outdoor unit is powered off or not, starting and stopping when the outdoor unit is not powered off and operation parameters when the outdoor unit is started; whether the indoor unit is powered off or not, starting and stopping when the indoor unit is powered off and operating parameters when the indoor unit is powered on are determined, and whether the refrigerant leakage device is powered off or not, starting and stopping when the refrigerant leakage device is powered off and operating parameters when the refrigerant leakage device is powered on are determined. According to the scheme, the refrigerant leakage processing device is arranged on the outdoor side of the air conditioner, and active anti-explosion measures are taken under the condition that refrigerant leakage of the air conditioner is determined, so that the safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and specifically relates to a control method, device, air conditioner, storage medium and computer program product of an air conditioner, and in particular to a refrigerant leakage treatment method, device, air conditioner, storage medium and computer program product of a photovoltaic direct-driven R290 air conditioner. Background Art

[0002] As the Kigali Amendment gradually affects my country, refrigerants with high greenhouse effect potential (GWP) such as R134a and R32 will be gradually restricted, and natural refrigerants with low GWP will gradually rise and enter the market. Compared with R32, this type of natural refrigerant represented by R290 is more flammable and explosive, so when the refrigerant leaks, the safety issue of how to prevent fire and explosion becomes more prominent.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The object of the present invention is to provide an air conditioner control method, device, air conditioner, storage medium and computer program product to solve the safety problem of how to prevent fire and explosion when the air conditioner refrigerant adopts a natural working fluid represented by R290, so as to achieve the effect of improving safety by arranging a refrigerant leakage processing device on the outdoor side of the air conditioner and taking active explosion-proof measures when the air conditioner refrigerant leakage is determined.

[0005] The present invention provides a control method for an air conditioner, wherein the air conditioner has an outdoor part and an indoor part, the outdoor part includes an outdoor unit and a refrigerant leakage processing device, and the indoor part includes an indoor unit; the control method for the air conditioner includes: obtaining a refrigerant leakage signal of the air conditioner; and, when the refrigerant leakage processing device is working, obtaining a working current of the refrigerant leakage processing device; determining the type of the refrigerant leakage signal; and 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 preset explosion-proof measures: whether the outdoor unit is powered off, the operation parameters of opening and closing when the power is not cut off, and the operation parameters of opening when the power is on, whether the indoor unit is powered off, the operation parameters of opening and closing when the power is not cut off, and the operation parameters of opening when the power is on, and whether the refrigerant leakage device is powered off, the operation parameters of opening and closing when the power is not cut off, and the operation parameters of opening when the power is on.

[0006] In some embodiments, the indoor unit also has a drain pipe, which is connected to the water receiving pan outlet of the indoor unit; the refrigerant leakage device includes: a power supply module and an exhaust module; the exhaust module includes: a three-way switch and an air pump; wherein the power supply module is used to power 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 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; when the three-way switch is turned on, 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.

[0007] 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; determining the type of the refrigerant leakage signal includes: if it is determined that the air conditioner is operating in any one of the cooling mode of the air conditioner and the dehumidification mode of the air conditioner, then determining that the type of the refrigerant leakage signal is the preset first leakage type; if it is determined that the air conditioner is operating 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, then determining that the type of the refrigerant leakage signal is the preset second leakage type; In the case where the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than the preset exhaust temperature threshold, 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 state of shutdown due to an air conditioner fault or the indoor unit is started but the compressor in the air conditioner is not started, the type of the refrigerant leakage signal is determined to be the preset third leakage type; in the case where it is determined that the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is less than or equal to the preset exhaust temperature threshold, the type of the refrigerant leakage signal is determined to be 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 an air guide plate; 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 preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of the start and close when it is not powered off, and the operating parameters of the start and close when it is not powered off, and the operating parameters of the refrigerant leakage device when it is powered off, the operating parameters of the start and close when it is not powered off, and the operating parameters of the start and close when it is not powered off, including: 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, controlling the compressor to remain on and controlling the frequency of the compressor to decrease to the preset frequency at a preset first rate, and then controlling the compressor to stop and power off; 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, controlling the During the period when the frequency of the compressor is reduced at a preset first rate, the opening of the throttling device is controlled to maintain the current value; after the compressor is controlled to stop and the power is cut off, the opening of the throttling device is controlled to be closed at a preset second rate until the opening of the throttling device is 0; when 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 and closing of the indoor fan and the speed when opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled; when 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 and closing of the outdoor fan and the speed when opening are controlled according to the type of the refrigerant leakage signal; 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 combination with the working current of the refrigerant leakage processing device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not cut off, and the operating parameters when opening are controlled.

[0009] In some embodiments, when 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 speed when opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled, including: when it is determined that the type of the refrigerant leakage signal is the 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 start decreasing, and 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; when it is determined that the type of the refrigerant leakage signal is the 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 start maintaining 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;

[0010] And / or, when 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 outdoor fan and the speed when it is turned on are controlled according to the type of the refrigerant leakage signal, and the power-off of the refrigerant leakage device, the opening and closing when it is not turned on, and the operating parameters when it is turned on are controlled, including: when it is determined that the type of the refrigerant leakage signal is a preset first leakage type, while the frequency of the compressor is controlled to be reduced at a preset first rate, the speed of the outdoor fan is controlled to maintain a current value; while the opening of the throttling device is controlled to be closed, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan reaches a preset maximum fan speed, and the speed of the outdoor fan is controlled to maintain a current value; and when the opening of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to stop and cut off power; in the case of determining that the type of the refrigerant leakage signal is a preset second leakage type, during the period of controlling the frequency of the compressor to decrease at a preset first rate, controlling the speed of the outdoor fan to start reducing the first set proportion based on the current value of the speed of the outdoor fan and then maintaining a new current value; while controlling the opening of the throttling device to be closed, controlling the speed of the outdoor fan to increase until the speed of the outdoor fan continues to decrease to a preset minimum fan speed, and then controlling the speed of the outdoor fan to maintain the current value; and when the opening of the throttling device is controlled to be closed to 0, controlling the outdoor fan to stop and cut off the power; 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 when the electric auxiliary heating device of the air conditioner is turned on, the electric auxiliary heating device is controlled to be turned off and cut off the power;

[0011] And / or, in the case where the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotational speed of the air pump; the working current of the refrigerant leakage processing device, including: the working current of the air pump; in the 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, according to the type of the refrigerant leakage signal and under the preset first leakage type in combination with the working current of the refrigerant leakage processing device, the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when it is turned on are controlled, including: while controlling the frequency of the compressor to decrease at a preset first rate, controlling the three-way switch to turn on, and controlling the air pump to turn on; after the air pump is turned on, controlling the air pump to rotate at a preset maximum pump speed for a first preset period of time, and then controlling the speed of the air pump to decrease After reaching the second set proportion of the preset maximum pump speed, it runs for a second preset time period, and then controls the speed of the air pump to increase to the preset maximum pump speed and run for a third preset time period; thereafter, when the air pump is running at the preset maximum pump speed, for the average current of the working current of the air pump in each operating cycle, if the difference between the average currents of two operating cycles within a set time interval does not exceed a set error, the speed of the air pump is controlled to be reduced to the third set proportion of the preset maximum pump speed and then maintained at the current value for exhaust treatment; wherein the third set proportion is greater than the second set proportion; 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 speed of the air pump is controlled to be reduced to the third set proportion of the preset maximum pump speed and then maintained at the current value for exhaust treatment.

[0012] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotational 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 processing device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, whether the indoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, and whether the refrigerant leakage device is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, and also includes: when 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 turned on, and the air pump is controlled to be turned on; after the air pump is turned on, the rotational speed of the air pump is controlled to be reduced to a third set ratio of the preset maximum pump speed and then maintained at the current value for exhaust treatment.

[0013] Matching the above method, the present invention provides a control device for an air conditioner on the other hand, 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 device for the air conditioner includes: an acquisition unit, configured to acquire a refrigerant leakage signal of the air conditioner; and, when the refrigerant leakage processing device is working, acquiring a working current of the refrigerant leakage processing device; a control unit, configured to determine the type of the refrigerant leakage signal; the control unit is also 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operation parameters of starting and closing when the power is not off, and the operation parameters of starting and closing when the power is not off, and the operation parameters of starting and closing when the power is not off, and the operation parameters of starting and closing when the power is not off, and the operation parameters of the refrigerant leakage device when the power is off, the operation parameters of starting and closing when the power is not off, and the operation parameters of starting.

[0014] In some embodiments, the indoor unit also has a drain pipe, which is connected to the water receiving pan outlet of the indoor unit; the refrigerant leakage device includes: a power supply module and an exhaust module; the exhaust module includes: a three-way switch and an air pump; wherein the power supply module is used to power 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 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; when the three-way switch is turned on, 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.

[0015] 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 control unit determines the type of the refrigerant leakage signal, including: if it is determined that the air conditioner is operating in any one of the cooling mode of the air conditioner and the dehumidification mode of the air conditioner, 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 heating mode of the air conditioner, the air supply mode of the air conditioner, and the drying mode of the air conditioner, then the type of the refrigerant leakage signal is determined to be the preset second leakage type; after determining When the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than the preset exhaust temperature threshold, 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 state of shutdown due to an air conditioner fault or the indoor unit is started but the compressor in the air conditioner is not started, the type of the refrigerant leakage signal is determined to be the preset third leakage type; when it is determined that the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is less than or equal to the preset exhaust temperature threshold, the type of the refrigerant leakage signal is determined to be the preset third leakage type.

[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 an air guide plate; 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of the start and close when it is not powered off, and the operating parameters of the start and close when it is not powered off, and the operating parameters of the refrigerant leakage device when it is powered off, the operating parameters of the start and close when it is not powered off, and the operating parameters of the start and close when it is not powered off, including: when 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 on and the frequency of the compressor is controlled to decrease to the preset frequency at a preset first rate, and then the compressor is controlled to stop and power off; when 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 when the frequency of the compressor is controlled to decrease at a preset first rate, the opening of the throttling device is controlled to maintain the current value; after the compressor is controlled to stop and the power is cut off, the opening of the throttling device is controlled to be closed at a preset second rate until the opening of the throttling device is 0; when 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 and closing of the indoor fan and the speed when opening are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled; when 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 and closing of the outdoor fan and the speed when opening are controlled according to the type of the refrigerant leakage signal; 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 combination with the working current of the refrigerant leakage processing device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not cut off, and the operating parameters when opening are controlled.

[0017] In some embodiments, the control unit, when determining 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 indoor fan and the speed when opening, and controls the opening and closing of the air guide plate according to the type of the refrigerant leakage signal, including: when determining that the type of the refrigerant leakage signal is the preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, controlling the speed of the indoor fan to start decreasing, and controlling the air guide plate to start closing; and, after controlling the compressor to stop and power off, controlling the indoor fan to stop and power off; when determining that the type of the refrigerant leakage signal is the preset second leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, controlling the speed of the indoor fan to start maintaining the current value; while controlling the compressor to stop and power off, controlling the air guide plate to start closing; 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, when determining 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 speed when it is turned on according to the type of the refrigerant leakage signal, and controls whether the refrigerant leakage device is powered off, and the operating parameters of the opening and closing when it is not powered off and when it is turned on, including: when determining that the type of the refrigerant leakage signal is the preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, controlling the speed of the outdoor fan to maintain the current value; while controlling the opening of the throttling device to close, controlling the speed of the outdoor fan to increase until the speed of the outdoor fan reaches When the speed of the outdoor fan reaches a preset maximum fan speed, the speed of the outdoor fan is controlled to maintain the current value; and when the opening of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to stop and cut off the power; when it is determined that the type of the refrigerant leakage signal is a preset second leakage type, while the frequency of the compressor is controlled to be reduced at a preset first rate, the speed of the outdoor fan is controlled to start reducing by a first set ratio based on the current value of the speed of the outdoor fan and then maintain a new current value; while the opening of the throttling device is controlled to be closed, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan continues to decrease to the preset minimum fan speed, and the speed of the outdoor fan is controlled to maintain current value; and, when the opening of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to be stopped and powered off; wherein, when it is determined that the type of the refrigerant leakage signal is the 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, when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the speed of the air pump; the working current of the refrigerant leakage processing device, including: the working current of the air pump; the control unit, when it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage In the case of a leakage type, according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage processing device under the preset first leakage type, control the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when it is turned on, including: while controlling the frequency of the compressor to decrease at a preset first rate, controlling the three-way switch to turn on, and controlling the air pump to turn on; after the air pump is turned on, controlling the air pump to rotate at a preset maximum pump speed for a first preset time, controlling the speed of the air pump to decrease to a second set ratio of the preset maximum pump speed and then run for a second preset time, and then controlling the speed of the air pump to increase to a preset maximum pump speed for a third preset time;Afterwards, when the air pump is running at the preset maximum pump speed, for the average current of the working current of the air pump in each operation cycle, if the difference between the average currents of two operation cycles within a set time interval does not exceed the set error, the speed of the air pump is controlled to be reduced to the third set ratio of the preset maximum pump speed and then maintained at the current value for exhaust processing; wherein the third set ratio is greater than the second set ratio; while controlling the frequency of the compressor to be reduced at the 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 speed of the air pump is controlled to be reduced to the third set ratio of the preset maximum pump speed and then maintained at the current value for exhaust processing. ;

[0019] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the speed of the air 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, whether the indoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, and whether the refrigerant leakage device is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is turned on, and also includes: when 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 turned on, and the air pump is controlled to be turned on; after the air pump is turned on, the speed of the air pump is controlled to be reduced to a third set ratio of the preset maximum pump speed and then maintained at the current value for exhaust processing.

[0020] Matching the above device, the present invention provides an air conditioner on another aspect, including: the control device of the air conditioner mentioned above.

[0021] In accordance with the above method, the present invention provides a storage medium on the other hand, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioning control method described above.

[0022] In accordance with the above method, the present invention provides a computer program product on another aspect, including a computer program, which implements the steps of the above air conditioning control method when executed by a processor.

[0023] Therefore, the scheme of the present invention, with respect to the refrigerant leakage treatment of the air conditioner, a refrigerant leakage treatment 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, and a detection unit is arranged on the indoor side; when the detection unit determines that a refrigerant leakage occurs in the air conditioner, a refrigerant leakage signal (such as a signal L, a signal H, and a signal O) is sent by the indoor unit to a refrigerant leakage treatment system (such as a system including the refrigerant leakage treatment device); the refrigerant leakage treatment system controls the operation of the compressor, the electronic expansion valve, the indoor fan, the air guide plate, the outdoor fan, and the three-way valve and the air pump in the exhaust unit according to the type of the refrigerant leakage signal received, and considers the defrosting process and the opening and closing of the electric auxiliary heating device when the air conditioner is heating, so as to execute preset active explosion-proof measures; thereby, safety is improved by arranging a refrigerant leakage treatment device on the outdoor side of the air conditioner and taking active explosion-proof measures when a refrigerant leakage of the air conditioner is determined.

[0024] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a flow chart of an embodiment of a method for controlling an air conditioner of the present invention;

[0027] Figure 2 A schematic diagram of a flow chart of an embodiment of executing preset explosion-proof measures in the method of the present invention;

[0028] Figure 3 A schematic structural diagram of an embodiment of a control device for an air conditioner of the present invention;

[0029] Figure 4 It is a structural schematic diagram of a refrigerant leakage treatment device for an air conditioner;

[0030] Figure 5 The figure is a flow chart of a method for handling refrigerant leakage of an air conditioner;

[0031] Figure 6 This is a leakage processing timing diagram after the refrigerant leaks during air conditioning cooling;

[0032] Figure 7 This is a leak processing timing diagram after refrigerant leaks during air conditioning heating.

[0033] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

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

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Considering that when the air conditioning refrigerant uses natural working fluids such as R290, there are safety issues such as how to prevent fire and explosion when the refrigerant leaks. In the relevant solutions, there are few solutions for refrigerant leakage in the field of household air conditioning. Generally, fresh air air conditioners can use fresh air exhaust, and air conditioners without this structure generally have no solution.

[0037] Therefore, the scheme of the present invention proposes a control method for an air conditioner, specifically a refrigerant leakage treatment method for a photovoltaic direct-driven R290 air conditioner. In the absence of a fresh air structure, the refrigerant leakage is treated by a certain control method and by utilizing the characteristics of a photovoltaic air conditioner.

[0038] According to an embodiment of the present invention, a method for controlling an air conditioner is provided. Figure 1 The flow chart of an embodiment of the method of the present invention is shown. The control method of the air conditioner can preferably be applied to the refrigerant leakage treatment of the photovoltaic direct-driven R290 air conditioner, the air conditioner has an outdoor unit, an indoor unit, and a refrigerant leakage treatment 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 treatment device are both located on the outdoor side of the air conditioner. In the scheme of the present invention, Figure 1 As shown, the air conditioner control method includes: steps S110 to S130.

[0039] At step S110, when the air conditioner is running or stopped, at the refrigerant leakage processing device of the outdoor unit, a refrigerant leakage signal of the air conditioner is obtained from the indoor unit; and, when the refrigerant leakage processing device is working, at the refrigerant leakage processing device of the outdoor unit, a working current of the refrigerant leakage processing device is obtained from one side of the outdoor unit; wherein the refrigerant leakage signal of the air conditioner is such as signal L, signal H and signal O, and the working current of the refrigerant leakage processing device is such as the current of the air pump.

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

[0041] At step S130, at the refrigerant leakage processing device of the outdoor unit, at least one of the following is controlled from one 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened, whether the indoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened, and whether the refrigerant leakage device is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened.

[0042] Specifically, the control method of an air conditioner provided by the solution of the present invention can preferably be applied to the refrigerant leakage treatment of a photovoltaic direct-driven R290 air conditioner, wherein the air conditioner has an outdoor unit and an indoor unit, wherein the outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), an outdoor fan, and a refrigerant leakage treatment device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit), and the indoor unit has an indoor fan and an air guide plate. In the solution of the present invention, the control method of the air conditioner includes:

[0043] When the air conditioner is running or stopped, a refrigerant leakage signal of the air conditioner is obtained from the indoor unit at the refrigerant leakage processing device of the outdoor unit; when defrosting in the heating mode of the air conditioner, the exhaust temperature of the compressor is obtained from one side of the outdoor unit at the refrigerant leakage processing device of the outdoor unit; and when the refrigerant leakage processing device is working, the working current of the refrigerant leakage processing device is obtained from one side of the outdoor unit at the refrigerant leakage processing device of the outdoor unit; wherein the refrigerant leakage signal of the air conditioner is such as signal L, signal H and signal O, and the working current of the refrigerant leakage processing device is such as the current of the air pump.

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

[0045] At the refrigerant leakage processing device of the outdoor unit, at least one of the following is controlled from one 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 processing device to execute preset explosion-proof measures: whether the compressor is powered off or not, the start and close when the power is not off, and the frequency when it is opened; whether the throttling device is powered off or not, the opening degree when the power is not off, whether the outdoor fan is powered off or not, the start and close when the power is not off, and the speed when it is opened; whether the refrigerant leakage device is powered off or not, the start and close when the power is not off, and the operating parameters when it is opened; whether the indoor unit is powered off or not, the start and close and the speed when the indoor fan is opened when the power is not off, and the opening and closing of the air guide plate when the indoor unit is not powered off.

[0046] The scheme of the present invention proposes a refrigerant leakage treatment scheme for photovoltaic direct-driven R290 air conditioners. Combined with the energy storage and power supply characteristics of photovoltaic air conditioners, there is no need to add complex structures such as new air ducts. A slight modification of the existing air conditioner internal unit drainage pipe and related logic coordination can achieve the R290 special leakage treatment mode, control the refrigerant leakage range within the air conditioner, and implement fire and explosion prevention of the air conditioner and the room, ensuring 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 situation can be handled through a certain control method and by utilizing the characteristics of photovoltaic air conditioners.

[0047] In some embodiments, the indoor unit further comprises a drain pipe, which is connected to the outlet of the water receiving pan of the indoor unit; the refrigerant leakage device comprises: a power supply module such as Figure 4 The power supply unit shown in the figure has a power supply part and an exhaust module. Figure 4 The exhaust part in the exhaust unit shown; the exhaust module includes: a three-way switch and an air pump, the three-way switch is such as a three-way solenoid valve.

[0048] The power supply module is used 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 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. When the three-way switch is turned on, the air pump is connected to the drain pipe; when the three-way switch is turned off, the drain pipe is connected to the outside atmosphere.

[0049] In the solution of the present invention, the refrigerant leakage processing device of the air conditioner is located on the outdoor side, powered by photovoltaic power, and is usually not turned on. It is only powered on when the alkane sensor detects or the calculation detects a refrigerant leakage. Figure 4 The following is a schematic diagram of the structure of the refrigerant leakage treatment device for air conditioners. Figure 4 As shown, the refrigerant leakage treatment device of the air conditioner is structurally composed of a controller, an air pump, a three-way valve (i.e., an electromagnetic three-way valve), and an air pipe (i.e., a drain pipe) to form an exhaust unit, a temperature sensing package and an alkane sensor, and a controller to form a detection unit, and 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 cooperate to complete the refrigerant leakage treatment.

[0050] exist Figure 4 In the exhaust unit shown, the three-way valve has three ends, the first end of the three-way valve is connected to one end of the air pump, the second end is connected to the outlet of the indoor water receiving pan, and the third end is connected to the outside world, and the other end of the air pump is connected to the outside atmosphere; when the three-way valve is normally open, the air pump is connected to the outlet of the indoor water receiving pan; when the three-way valve is normally closed, the outlet of the indoor water receiving pan is connected to the outside world.

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

[0052] In the solution of the present invention, by setting a refrigerant leakage processing device on the outdoor side of the air conditioner, active explosion-proof measures are taken when the air conditioner refrigerant leakage is confirmed, thereby protecting the user's own safety and preventing dangerous situations.

[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 such as the type of signal L, the preset second leakage type is such as the type of signal H, and the preset third leakage type is such as the type of signal O.

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

[0055] The first determination scenario: if it is determined that the air conditioner is operating in any one of the cooling mode and the dehumidification mode of the air conditioner, then the type of the refrigerant leakage signal is determined to be the preset first leakage type.

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

[0057] The third determination scenario: when it is determined that the air conditioner is defrosting in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than the preset exhaust temperature threshold, then the type of the refrigerant leakage signal is determined to be the preset second leakage type; wherein the preset exhaust temperature threshold is, for example, 60°C.

[0058] A fourth determination scenario: if it is determined that the air conditioner is in a state of shutdown due to an air conditioner failure or the indoor unit is started but the compressor in the air conditioner is not started, then the type of the refrigerant leakage signal is determined to be the preset third leakage type.

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

[0060] Figure 5The following is a flow chart of the method for handling refrigerant leakage in air conditioners. Figure 5 As shown, the method for handling refrigerant leakage of the air conditioner includes:

[0061] Step 1. When it is determined that the air conditioner refrigerant is leaking, a refrigerant leakage signal is issued; after the refrigerant leakage signal is issued, it is determined whether the refrigerant leakage signal is signal L, signal H or signal O: if the refrigerant leakage signal is signal L, execute step 2; if the refrigerant leakage signal is signal H, execute step 3; if the refrigerant leakage signal is signal O, execute step 4.

[0062] In step 1, when the system detects that a refrigerant leak occurs, the indoor unit sends a signal to the leakage handling system (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 takes precedence over all control logics of the air conditioner, and the indoor and outdoor units are controlled by the leakage system controller.

[0063] In some schemes, the strategy adopted for R290 air conditioners is to use alkane sensors to sense the R290 concentration in the indoor air to judge. The density of R290 is greater than the average density of air. Therefore, when the air conditioner is turned on, the system refrigerant leakage position is far away from the alkane sensor and will gradually settle to the lower layer of the air with the air outlet (after cooling or heating, it will gradually drop to the lower layer of the room air). Therefore, when the air conditioner judges according to the alkane sensor or according to the refrigerant leakage detection method of the air conditioner proposed in the prior application of the applicant with application number 2024109843035, it is determined that the indoor evaporator is leaking refrigerant at this time, and the multiple modes provided in the scheme of the present invention are adopted to respond.

[0064] Among them, there are three possible leakage locations for the air-conditioning system refrigerant: the first category is the joints of the system, such as the joints between the indoor unit and the outdoor unit and the corresponding connecting pipes; the second category is pipe parts that may be soaked in water for a long time, such as pipes with water accumulated in the orthotic frame of the indoor unit evaporator and pipes with water accumulated in the chassis of the outdoor unit; the third category is pipes with large stress and strain, such as other locations such as the intake and exhaust ports.

[0065] In the solution of the present invention, 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 dehumidification mode of the air conditioner, a signal L is sent to the outdoor unit. In the air supply mode of the air conditioner, a signal H is sent to the outdoor unit. In the drying mode of the air conditioner, a signal H is sent to the outdoor unit. When the air conditioner stops due to a fault and the indoor unit displays a fault code, or when the indoor unit is started but the compressor is not started, a signal O is sent to the outdoor unit. Among them, the drying mode is the mode under heating conditions, and the dehumidification mode is the mode under cooling conditions.

[0067] During the heating and defrosting process, if the exhaust temperature of the compressor is less than or equal to 60℃, a signal O is sent to the outdoor unit. Because the high and low pressure difference will become smaller, there is no need to reduce the pressure of the indoor and outdoor units, and the power can be directly cut off; otherwise, a signal L is sent to the outdoor unit.

[0068] In the scheme of the present invention, after the refrigerant leakage is detected 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 is matched with 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; the indoor unit has an indoor fan and an air guide plate.

[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 operating parameters of the start and close when the power is not off, and the operating parameters of the indoor unit when the power is off, the operating parameters of the start and close when the power is not off, and the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, the start and close when the power is not off, and the operating parameters of the start and close when the power is not off, including: 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 1. To implement preset explosion-proof measures: whether the compressor is powered off or not, the start and close when the power is not off, and the frequency when it is opened; whether the throttling device is powered off or not, and the opening degree when the power is not off; whether the outdoor fan is powered off or not, the start and close when the power is not off, and the speed when it is opened; whether the refrigerant leakage device is powered off or not, the start and close when the power is not off, and the operating parameters when it is opened; whether the indoor unit is powered off or not, the start and close of the indoor fan when the indoor unit is not powered off, and the speed when it is opened; and the opening and closing of the air guide plate when the indoor unit is not powered off. Please refer to the following exemplary description for details.

[0071] Combine the following Figure 2The flowchart of an embodiment of executing the preset explosion-proof measures in the method of the present invention further illustrates the specific process of executing the preset explosion-proof measures in step S130, including: steps S210 to S250.

[0072] Step S210, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, the compressor is controlled to remain on and the frequency of the compressor is controlled to decrease to a preset frequency at a preset first rate, and then the compressor is controlled to stop and power off; wherein the preset first rate is such as 3Hz / s, and the preset frequency is such as 30Hz.

[0073] Step S220, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, controlling the opening of the throttling device to maintain a current value; after controlling the compressor to stop and cut off power, controlling the opening of the throttling device to close at a preset second rate until the opening of the throttling device is 0; wherein the preset first rate is, for example, a speed of 50b / s.

[0074] Step S230, when 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 and closing of the indoor fan and the speed when opened are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled.

[0075] Step S240, when 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 and the rotation speed of the outdoor fan when it is turned on are controlled according to the type of the refrigerant leakage signal.

[0076] Step S250, 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 combination with the working current of the refrigerant leakage processing device under the preset first leakage type, control the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when opened.

[0077] In the scheme of the present invention, when the refrigerant leakage is handled in the case of air conditioning refrigeration: first, the detection part is divided into alkane concentration detection and system leakage detection. Since it is determined that a leak occurs, the compressor is first reduced in frequency and then closed. The purpose of this treatment is to prevent the system pressure from fluctuating violently due to sudden power failure of the compressor at high frequency, because the system already has a rupture, and the huge pressure change may further cause the rupture to deteriorate further; at the same time, during the compressor frequency reduction period, the opening of the electronic expansion valve maintains the opening of the previous second before the frequency reduction; after the compressor is stopped, the electronic expansion valve is reset and closed to flow without flow (specifically, an electronic expansion valve with a closed valve and no flow is used), the indoor fan is closed, the air guide plate is closed, and finally the outdoor fan is closed. In the scheme of the present invention, when the refrigerant leakage is handled in the case of air conditioning refrigeration, the significance of setting the closing order of each component in this way is that: first, the compressor is stopped to reduce the maximum system pressure, the electronic expansion valve is closed, the flow of the refrigerant is restricted to a certain extent, the indoor fan is closed, and the refrigerant is prevented from further flowing to the indoor side, and the air guide plate is closed in the same way (because R290 is propane C3H8, and the relative molecular mass is greater than the average molecular mass of air 29, so the leakage can be reduced after the air guide plate is closed).

[0078] When the air conditioner is in cooling operation, the remote control signal is invalid after the refrigerant leakage processing signal is sent; the indoor unit is immediately powered off after the refrigerant leakage processing is completed, the purpose of which is to further reduce safety hazards, including safety hazards caused by customer misoperation. In the scheme of the present invention, the exhaust action is directly performed when the refrigerant leakage signal is sent; if a leak is found when the air conditioner is stopped, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from igniting, and the air pump is started on the outdoor side to exhaust air.

[0079] In the scheme of the present invention, when refrigerant leakage is handled under the condition of air conditioning heating: first, the detection part is divided into alkane concentration detection and system leakage detection. Since it is determined that a leakage has occurred, the compressor is first frequency-reduced and then shut down. The purpose of this treatment is to prevent drastic fluctuations in system pressure caused by sudden power failure of the compressor at high frequency. Because the system already has a rupture, a huge pressure change may further cause the rupture to worsen. At the same time, during the frequency reduction period of the compressor, the opening of the electronic expansion valve maintains the opening one second before the frequency reduction. After the compressor stops, the electronic expansion valve is reset and closed with no flow (specifically, an electronic expansion valve with a closed valve and no flow is used); the speed of the indoor fan remains unchanged, the air guide plate is closed, and the outdoor fan is reduced to the lowest windshield during the frequency reduction period of the compressor. When the compressor stops, the outdoor fan is shut down. In the scheme of the present invention, the significance of setting the shutdown order of various components in this way when dealing with refrigerant leakage in the case of air conditioning heating is: first, 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, and the indoor fan is turned off to prevent the refrigerant from further flowing to the indoor side. The same is true for closing the air guide plate (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air guide plate can reduce the leakage).

[0080] When the air conditioner is in heating mode, the remote control signal is invalid after the refrigerant leakage processing signal is sent; the indoor unit is immediately powered off after the refrigerant leakage processing is completed, the purpose of which is to further reduce safety hazards, including safety hazards caused by customer misoperation. In the scheme of the present invention, the exhaust action is directly performed when the refrigerant leakage signal is sent; if a leak is found when the air conditioner is stopped, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from igniting, and the air pump is started on the outdoor side to exhaust air.

[0081] In some embodiments, in step S230, when 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 speed when it is opened are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled, including any of the following indoor side control situations:

[0082] The first indoor control scenario: when it is determined that the type of the refrigerant leakage signal is the 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 start decreasing, and 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.

[0083] The second indoor control scenario: when it is determined that the type of the refrigerant leakage signal is the 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 start maintaining the current value; while controlling the compressor to stop and cut off the power, the air guide plate is controlled to start closing; and after controlling the compressor to stop and cut off the power, the indoor fan is controlled to stop and cut off the power.

[0084] In the scheme of the present invention, when 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 and closing of the indoor fan and the speed when opened are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled, the operation of the indoor electrical appliances is stopped and the power is turned on again to prevent electric sparks from being generated indoors and improve safety.

[0085] In some embodiments, in step S240, when 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 and speed of the outdoor fan when it is on are controlled according to the type of the refrigerant leakage signal, and the power-off of the refrigerant leakage device, the on / off when it is not powered off, and the operating parameters when it is on are controlled, including any of the following outdoor side control situations:

[0086] The first outdoor control scenario: when it is determined that the type of the refrigerant leakage signal is a preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the outdoor fan is controlled to maintain a current value; while controlling the opening of the throttling device to be closed, 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 maintain a current value; and when the opening of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to stop and the power is cut off.

[0087] The second outdoor control scenario: when it is determined that the type of the refrigerant leakage signal is the preset second leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, the speed of the outdoor fan is controlled to start reducing by a first set ratio based on the current value of the speed of the outdoor fan and then maintain a new current value (specifically, the speed of the outdoor fan is controlled to start reducing by a first set ratio of the current value of the speed of the outdoor fan based on the current value of the outdoor fan and then maintain a new current value of the speed of the outdoor fan); while controlling the opening of the throttling device to be closed, the speed of the outdoor fan is controlled to increase until the speed of the outdoor fan continues to decrease to the 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 be closed to 0, the outdoor fan is controlled to stop and the power is cut off; wherein, the first setting ratio is, for example, 30%.

[0088] Among them, when it is determined 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; in the solution of the present invention, in the heating mode of the air conditioner, when the outdoor unit receives the H signal, the electric auxiliary heating device is powered off if it is turned on.

[0089] In the scheme of the present invention, when 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 and closing of the outdoor fan and the speed when opened are controlled according to the type of the refrigerant leakage signal, and the power-off of the refrigerant leakage device, the opening and closing when the power is not cut off, and the operating parameters when opened are controlled to start the outdoor electrical appliances, reduce the accumulated amount of indoor refrigerant, and improve safety.

[0090] In some embodiments, when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation speed of the air pump; the working current of the refrigerant leakage handling device includes: the working current of the air pump.

[0091] In step S250, 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 combination with the working current of the refrigerant leakage processing device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when the refrigerant leakage device is opened are controlled, including any of the following outdoor refrigerant leakage processing situations:

[0092] The first situation for handling outdoor refrigerant leakage: while controlling the frequency of the compressor to decrease at a preset first rate, controlling the three-way switch to open and controlling the air pump to open; after the air pump is turned on, controlling the air pump to rotate at a preset maximum pump speed for a first preset time, controlling the air pump speed to decrease to a second set ratio of the preset maximum pump speed and then running for a second preset time, and then controlling the air pump speed to increase to the preset maximum pump speed and run for a third preset time; thereafter, when the air pump is running at the preset maximum pump speed, for the average current of the working current of the air pump in each operating cycle, if the difference between the average currents of two operating cycles within a set time interval does not exceed a set error, then controlling the air pump speed to decrease to a third set ratio of the preset maximum pump speed and then maintaining the current value for exhaust processing until manual control; wherein the third set ratio is greater than the second set ratio, the second set ratio is for example 50%, the third set ratio is for example 70%, the first preset time is for example 15s, the second preset time is for example 10s, and the third preset time is for example 15s.

[0093] The second outdoor refrigerant leakage treatment situation: while controlling the frequency of the compressor to decrease at a preset first rate, controlling the three-way switch to turn on, and controlling the air pump to turn on; after the air pump is turned on, controlling the speed of the air pump to decrease to a third setting ratio of the preset maximum pump speed, and then maintaining the current value to perform exhaust treatment until manual control. The third setting ratio is, for example, 70%.

[0094] In the scheme of the present invention, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, based on the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage handling device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when opened are controlled to further reduce the accumulated amount of indoor refrigerant and improve safety.

[0095] like Figure 5 As shown, the refrigerant leakage processing method of the air conditioner also includes: step 2, when the signal L is issued, the leakage processing system obtains the highest operating authority: first, the compressor frequency is reduced to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off; the opening of the electronic expansion valve remains unchanged during the compressor frequency reduction (such as the opening of the electronic expansion valve maintains the opening one second before the frequency reduction), and after the compressor stops, the opening of the electronic expansion valve is closed at a speed of 50b / s, and the opening of the electronic expansion valve is closed until it is reset to 0.

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

[0097] Figure 6 This is a leak processing sequence diagram after the refrigerant leaks during air conditioning cooling. In step 2, the specific sequence diagram is as follows Figure 6 As shown, the outdoor fan speed remains unchanged during the compressor frequency reduction period; when the opening of the electronic expansion valve is closed, the outdoor fan speed increases to the maximum speed; 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 and compressor frequency reduction are synchronous.

[0098] exist Figure 4 In the exhaust unit shown, when the three-way valve is normally open and the air pump is draining, it rotates at the maximum speed for 15 seconds, reduces to 50% of the maximum speed for 10 seconds, and then increases to the maximum speed for 15 seconds, during which the current of the air pump is detected.

[0099] When the average current of the above-mentioned air pump in the highest speed operation cycle shows a current difference of no more than 5% in two cycles of 5s, it is judged that the water has been drained and the exhaust action can be performed. The speed of the air pump is reduced to 70% of the maximum speed and remains constant; until after-sales personnel come to handle it, the external machine processing system (such as the exhaust unit) is manually closed on the outside. For details, please refer to Figure 6 The timing diagram is shown.

[0100] like Figure 5 As shown, the refrigerant leakage processing method of the air conditioner also includes: step 3, when the signal H is issued, the leakage processing system obtains the highest operating authority: first, the compressor frequency is reduced to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off. During the compressor frequency reduction, the opening of the electronic expansion valve remains unchanged (such as the opening of the electronic expansion valve maintains the opening one second before the frequency reduction). After the compressor stops, the opening of the electronic expansion valve is closed at a speed of 50b / s, and the opening of the electronic expansion valve is closed until it is reset to 0.

[0101] In step 3, when the compressor starts to reduce the frequency, the speed of the indoor fan starts to remain unchanged; when the compressor is powered off, the indoor fan is powered off, and the air guide plate starts to close when the compressor stops.

[0102] Figure 7This is a leak processing sequence diagram after the refrigerant leaks during air conditioning heating. In step 3, the outdoor fan starts to reduce to 70% of the current speed during the compressor frequency reduction period. When the opening of 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 and compressor frequency reduction are synchronized.

[0103] exist Figure 4 In the exhaust unit shown, the exhaust action is carried out in the normally open state of the three-way valve, and the air pump speed is 70% of the maximum speed and remains constant until the after-sales personnel come to handle it and manually close the external unit processing system on the outside. For details, see Figure 7 The timing diagram is shown.

[0104] In the solution of the present invention, after a system leak is found, the operation of indoor electrical appliances is stopped and the power is turned on again, and the operation of outdoor electrical appliances is started, so as to prevent electric sparks from being generated indoors and dangerous situations from occurring, thereby improving safety.

[0105] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation 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 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 operating parameters of the start and close when the power is not off, and the operating parameters of the indoor unit when the power is not off, and the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, the start and close when the power is not off, and the operating parameters of the start and close when the power is not off, including: 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 compressor is powered off, the frequency of the start and close when the power is not off, and the frequency of the start and close when the power is not off, whether the throttling device is powered off, the frequency of the start and close when the power is not off, and the frequency of the start and close when the power is not off The opening degree when the outdoor fan is powered off, the opening and closing when the power is not off, and the speed when it is turned on, the power off and the operating parameters of the refrigerant leakage device when the power is not off, 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 speed when it is turned on, and the opening and closing of the air guide plate when the indoor unit is not powered off, specifically also includes: when it is determined that the type of the refrigerant leakage signal is the preset third leakage type, control the indoor unit to be powered off, control the three-way switch to be turned on, and control the air pump to be turned on; after the air pump is turned on, control the speed of the air pump to be reduced to the third setting ratio of the preset maximum pump speed, and then maintain the current value to perform exhaust processing until manual control. Among them, the third setting ratio is 70%, for example.

[0107] like Figure 5 As shown, the refrigerant leakage treatment method of the air conditioner also includes: step 4, detected in the shutdown state: when the signal O is issued, the indoor unit is powered off, and the outdoor unit leakage system operates in the same way as heating. The three-way valve is opened, and the air pump is connected to the outlet of the indoor unit water tray when the three-way valve is normally open; when the three-way valve is normally closed, the outlet of the indoor unit water tray is connected to the outside, and the exhaust action is performed. The air pump speed is 70% of the maximum speed and remains constant until after-sales personnel come to handle it. The outdoor unit treatment system is manually closed on the outside. For details, please refer to Figure 7 The timing diagram is shown.

[0108] In the scheme of the present invention, after a system leak is found through the exhaust unit, active explosion-proof measures are taken to protect the user's own safety and prevent dangerous situations, thereby solving the safety problem of fire and explosion prevention of the air conditioner after the refrigerant leaks of the R290 air conditioner.

[0109] By adopting the technical solution of this embodiment, a refrigerant leakage treatment device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit) is set on the outdoor side of the air conditioner, and a detection unit is set on the indoor side; when the detection unit determines that a refrigerant leakage occurs in the air conditioner, a refrigerant leakage signal (such as signal L, signal H and signal O) is sent by the indoor unit to the refrigerant leakage treatment system (such as a system including the refrigerant leakage treatment device); the refrigerant leakage treatment system controls the operation of the compressor, the electronic expansion valve, the indoor fan, the air guide plate, the outdoor fan, and the three-way valve and the air pump in the exhaust unit according to the type of the refrigerant leakage signal received, and considers the defrosting process and the opening and closing of the electric auxiliary heating device when the air conditioner is heating, so as to execute the preset active explosion-proof measures; thereby, the safety is improved by setting the refrigerant leakage treatment device on the outdoor side of the air conditioner and taking active explosion-proof measures when the refrigerant leakage of the air conditioner is determined.

[0110] According to an embodiment of the present invention, a control device for an air conditioner corresponding to the control method for an air conditioner is also provided. Figure 3 The control device of the air conditioner can preferably be applied to the refrigerant leakage treatment of the photovoltaic direct-driven R290 air conditioner, the air conditioner has an outdoor unit, an indoor unit, and a refrigerant leakage treatment device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit), the outdoor unit and the refrigerant leakage treatment device are both located on the outdoor side of the air conditioner; in the scheme of the present invention, Figure 3 As shown, the air conditioner control device includes: 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 when the air conditioner is running or stopped; and, when the refrigerant leakage processing device is working, 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; wherein the refrigerant leakage signal of the air conditioner is such as signal L, signal H and signal O, and the working current of the refrigerant leakage processing device is such as the current of the air pump. The specific functions and processing of the acquisition unit 102 refer to 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 function and processing of the control unit 104 refer to step S120.

[0113] The control unit 104 is further configured to control at least one of the following at the refrigerant leakage processing device of the outdoor unit, based on the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage processing device, from one side of the outdoor unit, to execute the preset explosion-proof measures: whether the outdoor unit is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, whether the indoor unit is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, and whether the refrigerant leakage device is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on. The specific functions and processing of the control unit 104 are also referred to step S130.

[0114] Specifically, the solution of the present invention provides an air conditioner control device, which can preferably be applied to the refrigerant leakage treatment of a photovoltaic direct-driven R290 air conditioner, wherein the air conditioner has an outdoor unit and an indoor unit, wherein the outdoor unit has a compressor, a throttling device (such as an electronic expansion valve), an outdoor fan, and a refrigerant leakage treatment device (such as a refrigerant leakage detection device composed of a power supply unit and an exhaust unit), and the indoor unit has an indoor fan and an air guide plate. In the solution of the present invention, the air conditioner control device includes:

[0115] The acquisition unit 102 is further configured to acquire a refrigerant leakage signal of the air conditioner from the indoor unit at the refrigerant leakage processing device of the outdoor unit when the air conditioner is running or stopped; to acquire the exhaust temperature of the compressor from one side of the outdoor unit at the refrigerant leakage processing device of the outdoor unit when defrosting in the heating mode of the air conditioner; and to acquire a 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 when the refrigerant leakage processing device is working; wherein the refrigerant leakage signal of the air conditioner is such as signal L, signal H and signal O, and the working current of the refrigerant leakage processing device is such as the current of the air pump.

[0116] The control unit 104 is further 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.

[0117] The control unit 104 is further configured to control at least one of the following at the refrigerant leakage processing device of the outdoor unit, from one 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 processing device, so as to execute preset explosion-proof measures: whether the compressor is powered off or not, the start and close when the power is not off, and the frequency when it is opened, whether the throttling device is powered off or not, and the opening degree when the power is not off, whether the outdoor fan is powered off or not, the start and close when the power is not off, and the speed when it is opened, whether the refrigerant leakage device is powered off or not, the start and close when the power is not off, and the operating parameters when it is opened, whether the indoor unit is powered off or not, the start and close and the speed when the indoor fan is opened when the power is not off, and the opening and closing of the air guide plate when the indoor unit is not powered off.

[0118] The scheme of the present invention proposes a refrigerant leakage treatment scheme for photovoltaic direct-driven R290 air conditioners. Combined with the energy storage and power supply characteristics of photovoltaic air conditioners, there is no need to add complex structures such as new air ducts. A slight modification of the existing air conditioner internal unit drainage pipe and related logic coordination can achieve the R290 special leakage treatment mode, control the refrigerant leakage range within the air conditioner, and implement fire and explosion prevention of the air conditioner and the room, ensuring 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 situation can be handled through a certain control method and by utilizing the characteristics of photovoltaic air conditioners.

[0119] In some embodiments, the indoor unit further comprises a drain pipe, which is connected to the outlet of the water receiving pan of the indoor unit; the refrigerant leakage device comprises: a power supply module such as Figure 4 The power supply unit shown in the figure has a power supply part and an exhaust module. Figure 4 The exhaust part in the exhaust unit shown; the exhaust module includes: a three-way switch and an air pump, the three-way switch is such as a three-way solenoid valve.

[0120] The power supply module is used 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 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. When the three-way switch is turned on, the air pump is connected to the drain pipe; when the three-way switch is turned off, the drain pipe is connected to the outside atmosphere.

[0121] In the solution of the present invention, the refrigerant leakage processing device of the air conditioner is located on the outdoor side, powered by photovoltaic power, and is usually not turned on. It is only powered on when the alkane sensor detects or the calculation detects a refrigerant leakage. Figure 4 The following is a schematic diagram of the structure of the refrigerant leakage treatment device for air conditioners. Figure 4 As shown, the refrigerant leakage treatment device of the air conditioner is structurally composed of a controller, an air pump, a three-way valve (i.e., an electromagnetic three-way valve), and an air pipe (i.e., a drain pipe) to form an exhaust unit, a temperature sensing package and an alkane sensor, and a controller to form a detection unit, and 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 cooperate to complete the refrigerant leakage treatment.

[0122] exist Figure 4 In the exhaust unit shown, the three-way valve has three ends, the first end of the three-way valve is connected to one end of the air pump, the second end is connected to the outlet of the indoor water receiving pan, and the third end is connected to the outside world, and the other end of the air pump is connected to the outside atmosphere; when the three-way valve is normally open, the air pump is connected to the outlet of the indoor water receiving pan; when the three-way valve is normally closed, the outlet of the indoor water receiving pan is connected to 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 package is used to detect the temperature, and the alkane sensor is used to detect the concentration of alkane gases. In the power supply unit, the relay is used to control the on and off of the photovoltaic power supply. In the scheme of the present invention, the exhaust unit can absorb photovoltaic power to ensure the safety of electricity use in case of leakage.

[0124] In the solution of the present invention, by setting a refrigerant leakage processing device on the outdoor side of the air conditioner, active explosion-proof measures are taken when the air conditioner refrigerant leakage is confirmed, thereby protecting the user's own safety 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 such as the type of signal L, the preset second leakage type is such as the type of signal H, and the preset third leakage type is such as the type of signal O.

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

[0127] The first determination scenario: the control unit 104 is 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 operating in any one of the cooling mode and the dehumidification mode of the air conditioner.

[0128] The second determination scenario: the control unit 104 is further specifically 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 operating in any one of the heating mode, the air supply mode, and the drying mode of the air conditioner.

[0129] The third determination scenario: the control unit 104 is further specifically configured to, when it is determined that the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than a preset exhaust temperature threshold, determine that the type of the refrigerant leakage signal is the preset second leakage type; wherein the preset exhaust temperature threshold is, for example, 60°C.

[0130] The fourth determination scenario: the control unit 104 is further specifically configured to determine that the type of the refrigerant leakage signal is the preset third leakage type if it is determined that the air conditioner is in a state of shutdown due to an air conditioner failure or the indoor unit is started but the compressor in the air conditioner is not started.

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

[0132] Figure 5 The following is a flow chart of the method for handling refrigerant leakage in air conditioners. Figure 5 As shown, the method for handling refrigerant leakage of the air conditioner includes:

[0133] Step 1. When it is determined that the air conditioner refrigerant is leaking, a refrigerant leakage signal is issued; after the refrigerant leakage signal is issued, it is determined whether the refrigerant leakage signal is signal L, signal H or signal O: if the refrigerant leakage signal is signal L, execute step 2; if the refrigerant leakage signal is signal H, execute step 3; if the refrigerant leakage signal is signal O, execute step 4.

[0134] In step 1, when the system detects that a refrigerant leak occurs, the indoor unit sends a signal to the leakage handling system (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 takes precedence over all control logics of the air conditioner, and the indoor and outdoor units are controlled by the leakage system controller.

[0135] In some schemes, the strategy adopted for R290 air conditioners is to use alkane sensors to sense the R290 concentration in the indoor air to judge. The density of R290 is greater than the average density of air. Therefore, when the air conditioner is turned on, the system refrigerant leakage position is far away from the alkane sensor and will gradually settle to the lower layer of the air with the air outlet (after cooling or heating, it will gradually drop to the lower layer of the room air). Therefore, when the air conditioner judges according to the alkane sensor or according to the refrigerant leakage detection method of the air conditioner proposed in the prior application of the applicant with application number 2024109843035, it is determined that the indoor evaporator is leaking refrigerant at this time, and the multiple modes provided in the scheme of the present invention are adopted to respond.

[0136] Among them, there are three possible leakage locations for the air-conditioning system refrigerant: the first category is the joints of the system, such as the joints between the indoor unit and the outdoor unit and the corresponding connecting pipes; the second category is pipe parts that may be soaked in water for a long time, such as pipes with water accumulated in the orthotic frame of the indoor unit evaporator and pipes with water accumulated in the chassis of the outdoor unit; the third category is pipes with large stress and strain, such as other locations such as the intake and exhaust ports.

[0137] In the solution of the present invention, 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.

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

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

[0140] In the scheme of the present invention, after the refrigerant leakage is detected 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 is matched with 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.

[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 an air guide plate.

[0142] The control unit 104 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of the start and close when the power is not off, and the operating parameters of the indoor unit when the power is off, the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, including: according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage processing device, control At least one of the following is used to implement the preset explosion-proof measures: whether the compressor is powered off, the start and close when the power is not off, and the frequency when it is opened, whether the throttling device is powered off, and the opening degree when the power is not off, whether the outdoor fan is powered off, the start and close when the power is not off, and the speed when it is opened, whether the refrigerant leakage device is powered off, the start and close when the power is not off, and the operating parameters when it is opened, whether the indoor unit is powered off, the start and close of the indoor fan when the indoor unit is not powered off, and the speed when it is opened, and the opening and closing of the air guide plate when the indoor unit is not powered off, specifically as follows:

[0143] The control unit 104 is further configured to control the compressor to remain on and control the frequency of the compressor to decrease to a preset frequency at a preset first rate, and then control the compressor to stop and cut off power when the type of the refrigerant leakage signal is determined to be a preset first leakage type or a preset second leakage type; wherein the preset first rate is, for example, 3 Hz / s, and the preset frequency is, for example, 30 Hz. The specific functions and processing of the control unit 104 are also referred to step S210.

[0144] The control unit 104 is further configured to, when determining that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, control the opening of the throttling device to maintain a current value during the period when the frequency of the compressor is controlled to decrease at a preset first rate; after the compressor is controlled to stop and power off, control the opening of the throttling device to be closed at a preset second rate until the opening of the throttling device is 0; wherein the preset first rate is, for example, a speed of 50 b / s. The specific functions and processing of the control unit 104 are also referred to step S220.

[0145] The control unit 104 is further configured to control the opening and closing of the indoor fan and the speed when it is opened, and control the opening and closing of the air guide plate according to the type of the refrigerant leakage signal when determining that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type. The specific functions and processing of the control unit 104 are also shown in step S230.

[0146] The control unit 104 is further configured to control the opening and closing and the speed of the outdoor fan when it is turned on according to the type of the refrigerant leakage signal when the type of the refrigerant leakage signal is determined to be the preset first leakage type or the preset second leakage type. The specific functions and processing of the control unit 104 are also shown in step S240.

[0147] The control unit 104 is further configured to control the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when the refrigerant leakage device is on, according to the type of the refrigerant leakage signal and the working current of the refrigerant leakage processing device under the preset first leakage type, when determining that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type. The specific functions and processing of the control unit 104 are also shown in step S250.

[0148] In the scheme of the present invention, when the refrigerant leakage is handled in the case of air conditioning refrigeration: first, the detection part is divided into alkane concentration detection and system leakage detection. Since it is determined that a leak occurs, the compressor is first reduced in frequency and then closed. The purpose of this treatment is to prevent the system pressure from fluctuating violently due to sudden power failure of the compressor at high frequency, because the system already has a rupture, and the huge pressure change may further cause the rupture to deteriorate further; at the same time, during the compressor frequency reduction period, the opening of the electronic expansion valve maintains the opening of the previous second before the frequency reduction; after the compressor is stopped, the electronic expansion valve is reset and closed to flow without flow (specifically, an electronic expansion valve with a closed valve and no flow is used), the indoor fan is closed, the air guide plate is closed, and finally the outdoor fan is closed. In the scheme of the present invention, when the refrigerant leakage is handled in the case of air conditioning refrigeration, the significance of setting the closing order of each component in this way is that: first, the compressor is stopped to reduce the maximum system pressure, the electronic expansion valve is closed, the flow of the refrigerant is restricted to a certain extent, the indoor fan is closed, and the refrigerant is prevented from further flowing to the indoor side, and the air guide plate is closed in the same way (because R290 is propane C3H8, and the relative molecular mass is greater than the average molecular mass of air 29, so the leakage can be reduced after the air guide plate is closed).

[0149] When the air conditioner is in cooling operation, the remote control signal is invalid after the refrigerant leakage processing signal is sent; the indoor unit is immediately powered off after the refrigerant leakage processing is completed, the purpose of which is to further reduce safety hazards, including safety hazards caused by customer misoperation. In the scheme of the present invention, the exhaust action is directly performed when the refrigerant leakage signal is sent; if a leak is found when the air conditioner is stopped, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from igniting, and the air pump is started on the outdoor side to exhaust air.

[0150] In the scheme of the present invention, when refrigerant leakage is handled under the condition of air conditioning heating: first, the detection part is divided into alkane concentration detection and system leakage detection. Since it is determined that a leakage has occurred, the compressor is first frequency-reduced and then shut down. The purpose of this treatment is to prevent drastic fluctuations in system pressure caused by sudden power failure of the compressor at high frequency. Because the system already has a rupture, a huge pressure change may further cause the rupture to worsen. At the same time, during the frequency reduction period of the compressor, the opening of the electronic expansion valve maintains the opening one second before the frequency reduction. After the compressor stops, the electronic expansion valve is reset and closed with no flow (specifically, an electronic expansion valve with a closed valve and no flow is used); the speed of the indoor fan remains unchanged, the air guide plate is closed, and the outdoor fan is reduced to the lowest windshield during the frequency reduction period of the compressor. When the compressor stops, the outdoor fan is shut down. In the scheme of the present invention, the significance of setting the shutdown order of various components in this way when dealing with refrigerant leakage in the case of air conditioning heating is: first, 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, and the indoor fan is turned off to prevent the refrigerant from further flowing to the indoor side. The same is true for closing the air guide plate (because R290 is propane C3H8, the relative molecular mass is greater than the average molecular mass of air 29, so closing the air guide plate can reduce the leakage).

[0151] When the air conditioner is in heating mode, the remote control signal is invalid after the refrigerant leakage processing signal is sent; the indoor unit is immediately powered off after the refrigerant leakage processing is completed, the purpose of which is to further reduce safety hazards, including safety hazards caused by customer misoperation. In the scheme of the present invention, the exhaust action is directly performed when the refrigerant leakage signal is sent; if a leak is found when the air conditioner is stopped, the indoor unit is not powered on to prevent the indoor unit mainboard contactor from igniting, and the air pump is started on the outdoor side to exhaust air.

[0152] In some embodiments, the control unit 104, when determining 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 indoor fan and the speed when it is turned on according to the type of the refrigerant leakage signal, and controls the opening and closing of the air guide plate, including any of the following indoor side control situations:

[0153] The first indoor control scenario: the control unit 104 is further configured to, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type, control the frequency of the compressor to decrease at a preset first rate, control the speed of the indoor fan to start decreasing, and control the air guide plate to start closing; and, after controlling the compressor to stop and power off, control the indoor fan to stop and power off.

[0154] The second indoor control scenario: the control unit 104 is further configured to, when determining that the type of the refrigerant leakage signal is the preset second leakage type, control the frequency of the compressor to decrease at a preset first rate while controlling the speed of the indoor fan to start maintaining the current value; control the air guide plate to start closing while controlling the compressor to stop and cut off the power; and, after controlling the compressor to stop and cut off the power, control the indoor fan to stop and cut off the power.

[0155] In the scheme of the present invention, when 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 and closing of the indoor fan and the speed when opened are controlled according to the type of the refrigerant leakage signal, and the opening and closing of the air guide plate are controlled, the operation of the indoor electrical appliances is stopped and the power is turned on again to prevent electric sparks from being generated indoors and improve safety.

[0156] In some embodiments, the control unit 104, when determining 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 speed when it is opened according to the type of the refrigerant leakage signal, and controls whether the refrigerant leakage device is powered off, the opening and closing when it is not powered off, and the operating parameters when it is opened, including any of the following outdoor side control situations:

[0157] The first outdoor control scenario: the control unit 104 is further configured to, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type, control the speed of the outdoor fan to maintain a current value while controlling the frequency of the compressor to decrease at a preset first rate; while controlling the opening of the throttling device to be closed, control the speed of the outdoor fan to increase until the speed of the outdoor fan reaches a preset maximum fan speed, and then control the speed of the outdoor fan to maintain a current value; and, when the opening of the throttling device is controlled to be closed to 0, control the outdoor fan to stop and cut off the power.

[0158] The second outdoor control scenario: the control unit 104 is further configured to, when determining that the type of the refrigerant leakage signal is the preset second leakage type, control the speed of the outdoor fan to start reducing by a first set ratio based on the current value of the speed of the outdoor fan and then maintain a new current value (specifically, control the speed of the outdoor fan to start reducing by a first set ratio of the current value of the speed of the outdoor fan based on the current value of the outdoor fan and then maintain a new current value of the speed of the outdoor fan); while controlling the opening of the throttling device to be closed, control the speed of the outdoor fan to increase until the speed of the outdoor fan continues to decrease to the preset minimum fan speed, and then control the speed of the outdoor fan to maintain the current value; and, when the opening of the throttling device is controlled to be closed to 0, control the outdoor fan to stop and cut off the power; wherein, the first setting ratio is, for example, 30%.

[0159] Among them, the control unit 104 is specifically configured to control the electric auxiliary heating device to be turned off and powered off when it is determined that the type of the refrigerant leakage signal is a preset second leakage type, and when the air conditioner is in heating mode and the electric auxiliary heating device of the air conditioner is turned on; in the solution of the present invention, in the heating mode of the air conditioner, when the outdoor unit receives the H signal, the electric auxiliary heating device is powered off if it is turned on.

[0160] In the scheme of the present invention, when 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 and closing of the outdoor fan and the speed when opened are controlled according to the type of the refrigerant leakage signal, and the power-off of the refrigerant leakage device, the opening and closing when the power is not cut off, and the operating parameters when opened are controlled to start the outdoor electrical appliances, reduce the accumulated amount of indoor refrigerant, and improve safety.

[0161] In some embodiments, when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation speed of the air pump; the working current of the refrigerant leakage handling device includes: the working current of the air pump.

[0162] The control unit 104, when determining that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, controls whether the refrigerant leakage device is powered off, opened and closed when powered on, and 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 processing device under the preset first leakage type, including any of the following outdoor refrigerant leakage processing situations:

[0163] The first outdoor refrigerant leakage processing situation: the control unit 104 is specifically configured to control the three-way switch to turn on and control the air pump to turn on while controlling the frequency of the compressor to decrease at a preset first rate; after the air pump is turned on, the air pump is controlled to rotate at a preset maximum pump speed for a first preset time, and then the speed of the air pump is controlled to decrease to a second set ratio of the preset maximum pump speed and then run for a second preset time, and then the speed of the air pump is controlled to increase to the preset maximum pump speed and run for a third preset time; thereafter, when the air pump is running at the preset maximum pump speed, for the average current of the working current of the air pump in each operating cycle, if the difference between the average currents of two operating cycles within a set time interval does not exceed a set error, the speed of the air pump is controlled to decrease to a third set ratio of the preset maximum pump speed and then maintain the current value for exhaust processing until manual control; wherein the third set ratio is greater than the second set ratio, the second set ratio is for example 50%, the third set ratio is for example 70%, the first preset time is for example 15s, the second preset time is for example 10s, and the third preset time is for example 15s.

[0164] The second outdoor refrigerant leakage treatment situation: the control unit 104 is further configured to control the three-way switch to turn on and the air pump to turn on while controlling the frequency of the compressor to decrease at a preset first rate; after the air pump is turned on, the speed of the air pump is controlled to decrease to a third setting ratio of the preset maximum pump speed and then maintain the current value for exhaust processing until manual control. The third setting ratio is, for example, 70%.

[0165] In the scheme of the present invention, when it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, based on the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage handling device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when opened are controlled to further reduce the accumulated amount of indoor refrigerant and improve safety.

[0166] like Figure 5 As shown, the refrigerant leakage processing method of the air conditioner also includes: step 2, when the signal L is issued, the leakage processing system obtains the highest operating authority: first, the compressor frequency is reduced to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off; the opening of the electronic expansion valve remains unchanged during the compressor frequency reduction (such as the opening of the electronic expansion valve maintains the opening one second before the frequency reduction), and after the compressor stops, the opening of the electronic expansion valve is closed at a speed of 50b / s, and the opening of the electronic expansion valve is closed until it is reset to 0.

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

[0168] Figure 6 This is a leak processing sequence diagram after the refrigerant leaks during air conditioning cooling. In step 2, the specific sequence diagram is as follows Figure 6 As shown, the outdoor fan speed remains unchanged during the compressor frequency reduction period; when the opening of the electronic expansion valve is closed, the outdoor fan speed increases to the maximum speed; 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 and compressor frequency reduction are synchronous.

[0169] exist Figure 4 In the exhaust unit shown, when the three-way valve is normally open and the air pump is draining, it rotates at the maximum speed for 15 seconds, reduces to 50% of the maximum speed for 10 seconds, and then increases to the maximum speed for 15 seconds, during which the current of the air pump is detected.

[0170] When the average current of the above-mentioned air pump in the highest speed operation cycle shows a current difference of no more than 5% in two cycles of 5s, it is judged that the water has been drained and the exhaust action can be performed. The speed of the air pump is reduced to 70% of the maximum speed and remains constant; until after-sales personnel come to handle it, the external machine processing system (such as the exhaust unit) is manually closed on the outside. For details, please refer to Figure 6 The timing diagram is shown.

[0171] like Figure 5 As shown, the refrigerant leakage processing method of the air conditioner also includes: step 3, when the signal H is issued, the leakage processing system obtains the highest operating authority: first, the compressor frequency is reduced to 30Hz at a speed of 3Hz / s, and then the compressor is directly powered off. During the compressor frequency reduction, the opening of the electronic expansion valve remains unchanged (such as the opening of the electronic expansion valve maintains the opening one second before the frequency reduction). After the compressor stops, the opening of the electronic expansion valve is closed at a speed of 50b / s, and the opening of the electronic expansion valve is closed until it is reset to 0.

[0172] In step 3, when the compressor starts to reduce the frequency, the speed of the indoor fan starts to remain unchanged; when the compressor is powered off, the indoor fan is powered off, and the air guide plate starts to close when the compressor stops.

[0173] Figure 7 This is a leak processing sequence diagram after the refrigerant leaks during air conditioning heating. In step 3, the outdoor fan starts to reduce to 70% of the current speed during the compressor frequency reduction period. When the opening of 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 and compressor frequency reduction are synchronized.

[0174] exist Figure 4 In the exhaust unit shown, the exhaust action is carried out in the normally open state of the three-way valve, and the air pump speed is 70% of the maximum speed and remains constant until the after-sales personnel come to handle it and manually close the external unit processing system on the outside. For details, see Figure 7 The timing diagram is shown.

[0175] In the solution of the present invention, after a system leak is found, the operation of indoor electrical appliances is stopped and the power is turned on again, and the operation of outdoor electrical appliances is started, so as to prevent electric sparks from being generated indoors and dangerous situations from occurring, thereby improving safety.

[0176] In some embodiments, the type of the refrigerant leakage signal is a preset third leakage type; when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation speed of the air pump.

[0177] The control unit 104 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of the start and close when the power is not off, and the operating parameters of the indoor unit when the power is off, the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, the operating parameters of the start and close when the power is not off, and the operating parameters of the refrigerant leakage device when the power is off, including: according to the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage processing device, control At least one of the following is used to implement the preset explosion-proof measures: whether the compressor is powered off, the start and close when the power is not off, and the frequency when it is opened, whether the throttling device is powered off, and the opening degree when the power is not off, whether the outdoor fan is powered off, the start and close when the power is not off, and the speed when it is opened, whether the refrigerant leakage device is powered off, the start and close when the power is not off, and the operating parameters when it is opened, whether the indoor unit is powered off, the start and close of the indoor fan when the indoor unit is not powered off, and the speed when it is opened, and the opening and closing of the air guide plate when the indoor unit is not powered off, and the specific details are as follows:

[0178] The control unit 104 is further configured to, when determining that the type of the refrigerant leakage signal is a preset third leakage type, control the indoor unit to be powered off, control the three-way switch to be turned on, and control the air pump to be turned on; after the air pump is turned on, control the speed of the air pump to be reduced to a third set ratio of the preset maximum pump speed and then maintain the current value for exhaust processing until manual control. The third set ratio is, for example, 70%.

[0179] like Figure 5As shown, the refrigerant leakage treatment method of the air conditioner also includes: step 4, detected in the shutdown state: when the signal O is issued, the indoor unit is powered off, and the outdoor unit leakage system operates in the same way as heating. The three-way valve is opened, and the air pump is connected to the outlet of the indoor unit water tray when the three-way valve is normally open; when the three-way valve is normally closed, the outlet of the indoor unit water tray is connected to the outside, and the exhaust action is performed. The air pump speed is 70% of the maximum speed and remains constant until after-sales personnel come to handle it. The outdoor unit treatment system is manually closed on the outside. For details, please refer to Figure 7 The timing diagram is shown.

[0180] In the scheme of the present invention, after a system leak is found through the exhaust unit, active explosion-proof measures are taken to protect the user's own safety and prevent dangerous situations, thereby solving the safety problem of fire and explosion prevention of the air conditioner after the refrigerant leaks of the R290 air conditioner.

[0181] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0182] According to an embodiment of the present invention, an air conditioner corresponding to the control device of the air conditioner is also provided. The air conditioner may include: the control device of the air conditioner described above.

[0183] Since the processing and functions implemented by the air conditioner of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned devices, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments and will not be repeated here.

[0184] According to an embodiment of the present invention, a computer program product corresponding to the air conditioner control method is also provided, including a computer program, which implements the steps of the air conditioner control method described above when executed by a processor.

[0185] Since the processing and functions implemented by the product of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0186] According to an embodiment of the present invention, a storage medium corresponding to an air conditioner control method is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the steps of the air conditioner control method described above.

[0187] Since the processing and functions implemented by the storage medium of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0188] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0189] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner has an outdoor part and an indoor part, the outdoor part includes an outdoor unit and a refrigerant leakage treatment device, and the indoor part includes an indoor unit; the control method of the air conditioner includes: Acquiring a refrigerant leakage signal of the air conditioner; and, when the refrigerant leakage processing device is working, acquiring an operating current of the refrigerant leakage processing device; 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 handling device, at least one of the following is controlled to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened; whether the indoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened; and whether the refrigerant leakage device is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened.

2. The air conditioner control method according to claim 1, characterized in that: The indoor unit also has a drain pipe, which is connected to the outlet of the water receiving pan of the indoor unit; The refrigerant leakage device includes: a power supply module and an exhaust module; the exhaust module includes: a three-way switch and an air pump; wherein, The power supply module is used 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 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; When the three-way switch is turned on, the air pump is connected to the drain pipe; when the three-way switch is turned off, the drain pipe is connected to the outside atmosphere.

3. The air conditioner control method according to claim 1 or 2, characterized in that: 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; Determining the type of the refrigerant leakage signal includes: If it is determined that the air conditioner is operating in any one of the cooling mode and the dehumidification mode of the air conditioner, then determining that the type of the refrigerant leakage signal is the preset first leakage type; If it is determined that the air conditioner is operating 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, then determining that the type of the refrigerant leakage signal is the preset second leakage type; In the case where it is determined that the air conditioner is defrosting in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is greater than a preset exhaust temperature threshold, then 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 state of shutdown due to an air conditioner fault or the indoor unit is started but the compressor in the air conditioner is not started, determining that the type of the refrigerant leakage signal is the preset third leakage type; When it is determined that the air conditioner is defrosted in the heating mode of the air conditioner, if it is determined that the exhaust temperature of the compressor in the air conditioner is less than or equal to the preset exhaust temperature threshold, the type of the refrigerant leakage signal is determined to be the preset third leakage type.

4. The air conditioner control method according to any one of claims 1 to 3, characterized in that: 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 an air guide plate; 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 operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, whether the indoor unit is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, and whether the refrigerant leakage device is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, including: When it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, controlling the compressor to remain turned on and controlling the frequency of the compressor to decrease to a preset frequency at a preset first rate, and then controlling the compressor to stop and cut off power; When it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, during the period when the frequency of the compressor is controlled to decrease at a preset first rate, the opening of the throttling device is controlled to maintain a current value; after the compressor is controlled to stop and power is cut off, the opening of the throttling device is controlled to be closed at a preset second rate until the opening of the throttling device is 0; 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, the opening and closing of the indoor fan and the speed when it is turned on are controlled, and the opening and closing of the air guide plate are controlled; When it is determined that the type of the refrigerant leakage signal is a preset first leakage type or a preset second leakage type, controlling the on / off and the speed of the outdoor fan when it is turned on according to the type of the refrigerant leakage signal; When it is determined that the type of the refrigerant leakage signal is the preset first leakage type or the preset second leakage type, based on the type of the refrigerant leakage signal and in combination with the working current of the refrigerant leakage handling device under the preset first leakage type, the power-off of the refrigerant leakage device, the opening and closing when the power is not off, and the operating parameters when opened are controlled.

5. The air conditioner control method according to claim 4, characterized in that: in, When it is determined 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, controlling the opening and closing of the indoor fan and the speed when it is turned on, and controlling the opening and closing of the air guide plate, including: When it is determined that the type of the refrigerant leakage signal is a preset first leakage type, while controlling the frequency of the compressor to decrease at a preset first rate, controlling the speed of the indoor fan to start decreasing, and controlling the air guide plate to start closing; and after controlling the compressor to stop and cut off the power, controlling the indoor fan to stop and cut off the power; When it is determined that the type of the refrigerant leakage signal is the 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 start maintaining a current value; while controlling the compressor to stop and cut off the power, the air guide plate is controlled to start closing; and after controlling the compressor to stop and cut off the power, the indoor fan is controlled to stop and cut off the power; and / or, 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 on / off and speed of the outdoor fan when it is on are controlled, and the power-off of the refrigerant leakage device, the on / off when it is not off, and the operating parameters when it is on are controlled, including: In the case where it is determined that the type of the refrigerant leakage signal is 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 maintain a current value; while the opening of the throttling device is controlled to be closed, 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 maintain a current value; and when the opening of the throttling device is controlled to be closed to 0, the outdoor fan is controlled to stop and the power is cut off; In the case where it is determined that the type of the refrigerant leakage signal is a preset second 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 start decreasing by a first set ratio based on the current value of the speed of the outdoor fan and then maintain a new current value; while the opening of the throttling device is controlled to be closed, 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 be closed to 0, the outdoor fan is controlled to stop and the power is cut off; Wherein, when it is determined that the type of the refrigerant leakage signal is a preset second leakage type, in the heating mode of the air conditioner and when 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 where the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation speed of the air pump; the operating current of the refrigerant leakage processing device includes: the operating 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 combination with the working current of the refrigerant leakage processing device under the preset first leakage type, controlling whether the refrigerant leakage device is powered off, opening and closing when powered on, and operating parameters when powered on, including: While controlling the frequency of the compressor to decrease at a preset first rate, controlling the three-way switch to turn on, and controlling the air pump to turn on; after the air pump is turned on, controlling the air pump to rotate at a preset maximum pump speed for a first preset time, controlling the air pump speed to decrease to a second set ratio of the preset maximum pump speed and then running for a second preset time, and then controlling the air pump speed to increase to the preset maximum pump speed and run for a third preset time; thereafter, when the air pump is running at the preset maximum pump speed, for the average current of the working current of the air pump in each operating cycle, if the difference between the average currents of two operating cycles within a set time interval does not exceed a set error, controlling the air pump speed to decrease to a third set ratio of the preset maximum pump speed and then maintaining the current value for exhaust processing; wherein the third set ratio is greater than the second set ratio; While controlling the frequency of the compressor to decrease 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 speed of the air pump is controlled to be reduced to a third set ratio of the preset maximum pump speed and then maintain the current value for exhaust processing.

6. The air conditioner control method according to any one of claims 1 to 3, characterized in that: The type of the refrigerant leakage signal is a preset third leakage type; when the refrigerant leakage device includes a three-way switch and an air pump, the operating parameters of the refrigerant leakage device include: the rotation 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 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 operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, whether the indoor unit is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, and whether the refrigerant leakage device is powered off, the operation parameters of opening and closing when the power is not off, and the operation parameters of opening when the power is on, and also includes: When it is determined that the type of the refrigerant leakage signal is 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 a third set ratio of the preset maximum pump speed and then maintained at the current value for exhaust processing.

7. A control device for an air conditioner, characterized in that: The air conditioner has an outdoor part and an indoor part, the outdoor part includes an outdoor unit and a refrigerant leakage treatment device, and the indoor part includes an indoor unit; the control device of the air conditioner includes: an acquisition unit configured to acquire a refrigerant leakage signal of the air conditioner; and, when the refrigerant leakage processing device is working, acquire an operating current of the refrigerant leakage processing device; a control unit configured to determine a type of the refrigerant leakage signal; The control unit is also 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 processing device to execute preset explosion-proof measures: whether the outdoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened; whether the indoor unit is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened; and whether the refrigerant leakage device is powered off, the operating parameters of starting and closing when the power is not cut off, and when it is opened.

8. An air conditioner, characterized in that: include: The air conditioner control device as claimed in claim 7.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the air conditioner control method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the air conditioner control method according to any one of claims 1 to 6 are implemented.

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