Air conditioner capable of automatically recycling refrigerants and control method, device and system of air conditioner

Abstract

The invention discloses an air conditioner capable of automatically recycling refrigerants and a control method, device and system of the air conditioner, and belongs to the field of air conditioners. The air conditioner comprises an outdoor side and an indoor side, the outdoor side comprises a compressor, a condenser and an electronic expansion valve, the indoor side comprises an evaporator, one end of the evaporator is connected with the electronic expansion valve, the other end of the evaporator is connected with an air suction port of the compressor, and the outdoor side is provided with a first electric valve and a second electric valve. When a refrigerant recovery instruction is triggered, the first electric valve is closed firstly, so that the refrigerant on the outdoor side cannot enter the indoor side, the second electric valve is opened at the moment, the refrigerant on the indoor side enters the outdoor side, when the target parameter is smaller than the preset parameter value, it is indicated that the refrigerant on the indoor side basically enters the outdoor side, and the second electric valve is closed at the moment; the refrigerant on the indoor side is completely recovered to the outdoor side, so that the safety risk can be reduced when the refrigerant on the indoor side leaks or a fire disaster occurs.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular, to an air conditioner with automatic refrigerant recovery, and its control method, device and system. Background Art

[0002] Refrigerant has multiple importance in the air conditioning system. First of all, the main function of the refrigerant is to transfer heat energy through the evaporation and condensation processes, so as to achieve the refrigeration effect. In the air conditioning system, the refrigerant absorbs heat in the evaporator, reduces the air temperature, removes moisture at the same time, and improves the environmental comfort. There are various types of refrigerants, and different types of refrigerants have their own advantages and disadvantages. For example, Freon is widely used because of its excellent refrigeration effect and non-toxic and non-flammable characteristics, but it has a destructive effect on the ozone layer and may cause the greenhouse effect.

[0003] In order to reduce the impact on the environment, and with the requirements of global environmental protection regulations, the original refrigerant is gradually replaced by refrigerants with lower GWP values. New environmentally friendly refrigerants such as R32 and R454B are flammable. If a leak occurs, it will cause a fire hazard; in addition, when a fire occurs, the refrigerant will cause the fire situation to expand further. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present application provides an air conditioner with automatic refrigerant recovery, and its control method, device and system, so as to solve the problems that the existing air conditioner refrigerant is not easy to recover and there are safety risks when leakage or fire occurs.

[0005] The technical solution adopted by the present application to solve its technical problems is as follows:

[0006] In the first aspect, an air conditioner with automatic refrigerant recovery is provided, which includes an outdoor side and an indoor side. The outdoor side includes a compressor, a condenser and an electronic expansion valve. The indoor side includes an evaporator. One end of the evaporator is connected to the electronic expansion valve, and the other end is connected to the suction port of the compressor;

[0007] The outdoor side is provided with a first electric valve and a second electric valve;

[0008] The first electric valve is arranged on the pipeline between the exhaust port of the compressor and the evaporator;

[0009] The second electric valve is arranged between the suction port of the compressor and the evaporator;

[0010] When a refrigerant recovery instruction is triggered, the first electric valve is in a closed state and the second electric valve is in an open state; when the target parameter is less than the preset parameter value, the second electric valve changes from the open state to the closed state.

[0011] As an optional implementation manner of the present application, it further includes: a refrigerant leakage sensor;

[0012] The refrigerant leakage sensor is arranged on the indoor side and is used to detect whether there is refrigerant leakage on the indoor side.

[0013] As an optional implementation manner of the present application, it further includes: a fire determination module;

[0014] The fire determination module is used to determine whether a fire occurs in the space where the indoor side is located.

[0015] As an optional implementation manner of the present application, the target parameter includes at least one of the following:

[0016] Low-pressure pressure, suction pressure, evaporation pressure, and suction temperature.

[0017] In a second aspect, a method for controlling an air conditioner is provided, which is applied to the above-mentioned air conditioner. The method includes:

[0018] When a refrigerant recovery instruction is triggered, control the compressor to be in an operating state;

[0019] Control the first electric valve to close;

[0020] Obtain the target parameter;

[0021] When the target parameter is less than a preset parameter value, control the second electric valve to close and control the compressor to close.

[0022] As an optional implementation manner of the present application, when a refrigerant recovery instruction is triggered, controlling the compressor to be in an operating state includes:

[0023] When a refrigerant recovery instruction is triggered, obtain the operating state of the air conditioner;

[0024] If the air conditioner is in a non-operating state, control the compressor to start.

[0025] As an optional implementation manner of the present application, it further includes:

[0026] When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, trigger a refrigerant recovery instruction.

[0027] As an optional implementation manner of the present application, it further includes:

[0028] When it is determined that a fire occurs on the indoor side, trigger a refrigerant recovery instruction.

[0029] As an optional implementation manner of the present application, it further includes:

[0030] When a refrigerant recovery instruction sent by the user is received, trigger a refrigerant recovery instruction.

[0031] As an optional implementation manner of the present application, it further includes:

[0032] When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, control the indoor fan to be in the on state.

[0033] As an optional implementation manner of the present application, it further includes:

[0034] When any of the following conditions is triggered, control the indoor fan to close:

[0035] The reading of the refrigerant leakage sensor is less than the threshold;

[0036] The on duration of the indoor fan is greater than the preset duration, and the on duration is timed from the trigger of the refrigerant recovery instruction.

[0037] In a third aspect, there is provided an air conditioner control device applied to the above-mentioned air conditioner, and the device includes:

[0038] A compressor operation module for controlling the compressor to be in an operating state when a refrigerant recovery instruction is triggered;

[0039] A first electric valve control module for controlling the first electric valve to close;

[0040] A target parameter acquisition module for acquiring target parameters;

[0041] A second electric valve control module for controlling the second electric valve to close and controlling the compressor to close when the target parameter is less than the preset parameter value.

[0042] In a fourth aspect, there is provided an air conditioner control system, including:

[0043] At least one processor and at least one memory;

[0044] The memory stores executable instructions of the processor;

[0045] The processor is configured to execute the above-mentioned air conditioner control method.

[0046] Advantageous effects:

[0047] The technical solution of this application provides an air conditioner with automatic refrigerant recovery, as well as its control method, device, and system. The air conditioner includes an outdoor side and an indoor side. The outdoor side includes a compressor, a condenser, and an electronic expansion valve. The indoor side includes an evaporator. One end of the evaporator is connected to the electronic expansion valve, and the other end is connected to the suction port of the compressor. A first electric valve and a second electric valve are provided on the outdoor side. When a refrigerant recovery instruction is triggered, the first electric valve is first closed, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the target parameter is less than the preset parameter value, it means that basically all the refrigerant on the indoor side has entered the outdoor side. At this time, the second electric valve is closed, and all the refrigerant on the indoor side is recovered to the outdoor side, which can reduce the safety risk when the refrigerant leaks or a fire occurs on the indoor side. Brief Description of the Drawings

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0049] Figure 1 is a schematic structural diagram of an air conditioner with automatic refrigerant recovery provided by an embodiment of this application;

[0050] Figure 2 is a flowchart of an air conditioner control method provided by an embodiment of this application as Figure 1 shown;

[0051] Figure 3 is a flowchart of an air conditioner control method for indoor unit leakage provided by an embodiment of this application;

[0052] Figure 4 is a flowchart of an air conditioner control method during a fire provided by an embodiment of this application;

[0053] Figure 5 is a schematic structural diagram of an air conditioner control device provided by an embodiment of this application as Figure 1 shown;

[0054] Figure 6 is a schematic structural diagram of an air conditioner control system provided by an embodiment of this application as Figure 1 shown. Brief Description of the Drawings:

[0056] 1 - Compressor, 2 - Condenser, 3 - Electronic expansion valve, 4 - First electric valve, 5 - Evaporator, 6 - Refrigerant leakage sensor, 7 - Second electric valve. Detailed Embodiments

[0057] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part rather than all of the embodiments of this application. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope protected by this application.

[0058] When recovering the existing refrigerant, specific refrigerant recovery equipment is required to be connected to the refrigerant circulation loop to recover the refrigerant in the air conditioner into the refrigerant recovery equipment. However, the cost of the refrigerant recovery equipment is relatively high, and professional equipment and personnel are needed, so ordinary users cannot recover it. In addition, when using the refrigerant recovery equipment, the installation and operation take a long time. In the event of accidents such as leakage of the air conditioner on the indoor side of the air conditioner or fire in the space where the indoor side is located, there is not enough time to use the refrigerant recovery equipment.

[0059] To solve this problem, referring to Figure 1 , the embodiment of this application provides an air conditioner with automatic refrigerant recovery, including an outdoor side and an indoor side. The outdoor side includes a compressor 1, a condenser 2 and an electronic expansion valve 3. The indoor side includes an evaporator 5. One end of the evaporator 5 is connected to the electronic expansion valve 3, and the other end is connected to the suction port of the compressor 1. It can be understood that other components of the air conditioner in this application are the same as those of conventional components, and their connection relationships and installation positions are not improved in this application. Therefore, although not given in this application, the structures of some models of air conditioners, such as the air conditioner structure including a four-way valve, are also within the scope protected by the solution of this application. It can be understood that since no improvement is involved, some components in this application Figure 1 are not marked, such as the fans on the indoor side and the outdoor side (the indoor fan and the outdoor fan).

[0060] The outdoor side is provided with a first electric valve 4 and a second electric valve 7. Among them, the specific models and types of the first electric valve 4 and the second electric valve 7 are selected according to actual needs, such as an electric ball valve, which is not specifically limited in this application.

[0061] The first electric valve 4 is arranged on the pipeline between the exhaust port of the compressor 1 and the evaporator 5. As Figure 1 shown, it can be arranged between the evaporator 5 and the electronic expansion valve 3, or between the electronic expansion valve 3 and the condenser 2, or even between the compressor 1 and the condenser 2.

[0062] The second electric valve 7 is arranged between the suction port of the compressor 1 and the evaporator 5.

[0063] When the refrigerant recovery instruction is triggered, the first electric valve 4 is in the closed state and the second electric valve 7 is in the open state; since the second electric valve 7 is in the open state, as long as the compressor 1 operates, the refrigerant on the indoor side can be sucked into the outdoor side, and since the first electric valve 4 is in the closed state, the refrigerant on the outdoor side cannot enter the indoor side, so that the refrigerant on the indoor side can be transferred to the outdoor side; when the target parameter is less than the preset parameter value, the second electric valve 7 changes from the open state to the closed state. When the target parameter is less than the preset parameter value, it means that the refrigerant on the indoor side has been basically transferred to the outdoor side. Therefore, at this time, the second electric valve 7 and the compressor 1 are closed to ensure that the refrigerant on the outdoor side will not enter the indoor side (therefore, at this time, there is more refrigerant on the outdoor side and the pressure is higher. If the second electric valve 7 is not closed, it will flow back to the indoor side).

[0064] In addition, the target parameter includes at least one of the following:

[0065] Low pressure, suction pressure, evaporation pressure and suction temperature.

[0066] Taking the low pressure as an example, the low pressure is obtained by a low pressure sensor. The low pressure sensor is set at the suction port of the compressor or the exhaust port of the evaporator, that is, it can be set on the outdoor side or the indoor side. According to different air conditioner models, the setting method is different.

[0067] As a preferred implementation manner of the embodiment of the present application, it further includes: a refrigerant leakage sensor 6;

[0068] The refrigerant leakage sensor 6 is arranged on the indoor side and is used to detect whether there is refrigerant leakage on the indoor side. The specific installation position of the refrigerant leakage sensor 6 is set according to actual needs, such as being set on the evaporator 5 or the outer shell of the indoor side body. The present application does not make specific limitations. When the refrigerant leakage sensor 6 detects refrigerant leakage, refrigerant recovery is triggered.

[0069] Preferably, it further includes: a fire determination module;

[0070] The fire determination module is used to determine whether a fire has occurred in the space where the indoor side is located.

[0071] Among them, the fire determination module can be a sensor, such as a camera, a temperature sensor or a smoke alarm device, to judge whether a fire has occurred on the indoor side through image recognition, temperature recognition and smoke recognition, etc. The fire determination module can also be a communication module to communicate with an existing fire warning module to determine whether a fire has occurred.

[0072] It should be noted that the air conditioner referred to in this application can be in the form of an indoor unit and an outdoor unit. In this case, the indoor side is the indoor unit and the outdoor side is the outdoor unit. In addition, the number of outdoor units is at least one, such as a central air conditioner. In another embodiment, the air conditioner is an integrated unit, that is, the compressor, evaporator, and condenser are all in the same housing. In one embodiment, the outdoor side of the integrated air conditioner is arranged outdoors and the indoor side is arranged indoors. When recovering the refrigerant, the refrigerant is recovered outdoors. In another embodiment, both the outdoor side and the indoor side are arranged indoors or outdoors, such as a portable air conditioner. When recovering the refrigerant, the refrigerant is recovered to the outdoor side.

[0073] In addition, the solution of this application does not include a refrigerant storage tank, and the recovered refrigerant is located in the pipes and components (compressor, condenser, electronic expansion valve) on the outdoor side.

[0074] The air conditioner provided by the embodiment of this application includes an outdoor side and an indoor side. The outdoor side includes a compressor, a condenser, and an electronic expansion valve. The indoor side includes an evaporator. One end of the evaporator is connected to the electronic expansion valve, and the other end is connected to the suction port of the compressor. A first electric valve and a second electric valve are arranged on the outdoor side. When a refrigerant recovery instruction is triggered, the first electric valve is first closed, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the target parameter is less than the preset parameter value, it means that basically all the refrigerant on the indoor side has entered the outdoor side. At this time, the second electric valve is closed, and all the refrigerant on the indoor side is recovered to the outdoor side, which can reduce the safety risk when the refrigerant leaks or a fire occurs on the indoor side.

[0075] Based on the same inventive concept, as Figure 2 shown, this application provides an air conditioner control method, which is applied to the air conditioner provided in any of the above embodiments. The method includes:

[0076] S11: When a refrigerant recovery instruction is triggered, control the compressor to be in an operating state.

[0077] Among them, when a refrigerant recovery instruction is triggered, obtain the operating state of the air conditioner;

[0078] If the air conditioner is in a non-operating state, control the compressor to start, and the operating parameters of the compressor after starting are set according to actual needs.

[0079] If the air conditioner is in an operating state, control the compressor to continue operating with the current parameters, or operate with preset parameters (such as a specific frequency).

[0080] It should be noted that triggering the refrigerant recovery instruction includes the following three situations. When any of the situations occurs, the refrigerant recovery instruction is triggered:

[0081] When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, a refrigerant recovery command is triggered. Specifically, when the reading of the refrigerant leakage sensor is greater than or equal to the set value.

[0082] When it is determined that there is a fire on the indoor side, a refrigerant recovery command is triggered. For example, it is determined whether there is a fire on the indoor side through the fire determination module mentioned in the above embodiments.

[0083] When receiving the refrigerant recovery command sent by the user, a refrigerant recovery command is triggered. That is, a refrigerant recovery button or function option is added to the air conditioner remote control or the air conditioner control APP. After the user presses or clicks, a refrigerant recovery command is sent to the air conditioner.

[0084] S12: Control the first electric valve to close; after the first electric valve closes, the refrigerant on the outdoor side cannot enter the indoor side. It can be understood that the first electric valve and the second electric valve are in the normally open mode, so the second electric valve is not specifically controlled to open here. Of course, for some special electric valves, the second electric valve needs to be controlled to open here, or the second electric valve is controlled to open to the maximum.

[0085] S13: Obtain the target parameters; obtain through sensors, etc. In one embodiment, the target parameters are obtained once every preset period or in real time. In another embodiment, the target parameters are obtained after the first electric valve has been closed for a certain period of time.

[0086] Among them, the target parameters include at least one of the following:

[0087] Low pressure, suction pressure, evaporation pressure, and suction temperature. In actual use, low pressure is generally used because the feedback of low pressure is more direct, so the control speed is faster.

[0088] S14: When the target parameter is less than the preset parameter value, control the second electric valve to close and control the compressor to close. When the target parameter is less than the preset parameter value. It indicates that the refrigerant on the indoor side has basically entered the outdoor side. At this time, the second electric valve is closed to prevent the refrigerant on the outdoor side from flowing back to the indoor side.

[0089] As a preferred implementation manner of the present application, if the refrigerant recovery command is triggered because the refrigerant leakage sensor detects refrigerant leakage on the indoor side, at this time, when the refrigerant leakage sensor detects refrigerant leakage on the indoor side, control the indoor fan to be in the on state. Control the indoor fan to turn on.

[0090] In addition, when any of the following conditions is triggered, control the indoor fan to close:

[0091] The reading of the refrigerant leakage sensor is less than the threshold;

[0092] The opening duration of the indoor fan is greater than the preset duration, and the opening duration is timed from the triggering of the refrigerant recovery instruction.

[0093] For the air conditioner control method provided in the embodiments of the present application, when the refrigerant recovery instruction is triggered, the first electric valve is first closed, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the target parameter is less than the preset parameter value, it means that almost all the refrigerant on the indoor side has entered the outdoor side. At this time, the second electric valve is closed to recover all the refrigerant on the indoor side to the outdoor side, which can reduce the safety risk in case of refrigerant leakage or fire on the indoor side.

[0094] The following takes Figure 1 the described air conditioner as an example to introduce its control solutions in different situations.

[0095] Situation 1: Leakage of the indoor unit:

[0096] As Figure 3 shown:

[0097] The refrigerant leakage sensor detects whether there is leakage;

[0098] When the refrigerant leakage sensor detects leakage, the air conditioner display screen on the indoor unit (i.e., the indoor side) displays a fault code;

[0099] Detect whether the unit is running;

[0100] If it is not running, control the compressor to run, and at the same time, the controller issues an instruction to control the first electric valve to close to recover the refrigerant into the outdoor unit (i.e., the outdoor side);

[0101] When it is detected that the pressure of the low-pressure sensor (i.e., the low-pressure pressure) is lower than the set value (generally set to 0.03 - 0.05 Mpa), close the second electric valve and turn off the compressor.

[0102] After the repair is completed and the fault is eliminated, evacuate the indoor unit and supplement a small amount of refrigerant according to the system pressure;

[0103] If a flammable refrigerant is used, in addition to the above operations in case of leakage, increase the control of the indoor fan to run continuously to reduce the accumulation of refrigerant concentration, and stop the fan when the monitoring value of the refrigerant leakage sensor reaches the safe value.

[0104] Situation 2: In case of fire:

[0105] As Figure 4 shown:

[0106] The fire warning of the house can be connected to the controller, and the house triggers a fire warning;

[0107] Detect whether the unit is running;

[0108] If it is not running, control the compressor to run. At the same time, the controller issues an instruction to control the first electric valve to close, and recycle the refrigerant into the outdoor unit.

[0109] When it is detected that the pressure of the low-pressure sensor is lower than the set value (generally set to 0.03 - 0.05 Mpa), close the second electric valve and turn off the compressor.

[0110] Situation 3, after-sales maintenance:

[0111] If after-sales maintenance is required for the indoor unit, such as when refrigerant needs to be released for maintenance involving pipelines, etc.; control the outdoor unit through the controller to recycle the refrigerant.

[0112] That is: the controller issues an instruction to start the compressor, and controls the first electric valve to close, recycling the refrigerant into the outdoor unit. When it is detected that the pressure of the low-pressure sensor is lower than the set value (generally set to 0.03 - 0.05 Mpa), close the second electric valve and turn off the compressor. No other equipment is required for personnel, and at the same time, it prevents the compressor from being overloaded due to the operation of after-sales personnel.

[0113] For the air-conditioning control method provided by the embodiment of the present application, when a refrigerant recovery instruction is triggered, first close the first electric valve, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the low-pressure is less than the preset pressure value, it means that the refrigerant on the indoor side has basically entered the outdoor side. At this time, close the second electric valve to recover all the refrigerant on the indoor side to the outdoor side, which can recycle the refrigerant in case of abnormalities such as air-conditioning leakage and fire, reducing losses.

[0114] Based on the same inventive concept, as Figure 5 shown, the present application also provides an air-conditioning control device 50, which is applied to the air conditioner described in any of the above embodiments. The air-conditioning control device 50 includes:

[0115] A compressor operation module 51, configured to control the compressor to be in an operating state when a refrigerant recovery instruction is triggered.

[0116] Among them, when a refrigerant recovery instruction is triggered, obtain the operating state of the air conditioner;

[0117] If the air conditioner is in a non-operating state, control the compressor to start, and the operating parameters of the compressor after starting are set according to actual needs.

[0118] If the air conditioner is in an operating state, control the compressor to continue operating with the current parameters, or operate with preset parameters (such as a specific frequency).

[0119] It should be noted that triggering the refrigerant recovery instruction includes the following three situations. When any of the situations occurs, trigger the refrigerant recovery instruction:

[0120] When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, a refrigerant recovery command is triggered. Specifically, when the reading of the refrigerant leakage sensor is greater than or equal to the set value.

[0121] When it is determined that there is a fire on the indoor side, a refrigerant recovery command is triggered. For example, it is determined whether there is a fire on the indoor side through the fire determination module mentioned in the above embodiments.

[0122] When receiving the refrigerant recovery command sent by the user, a refrigerant recovery command is triggered. That is, a refrigerant recovery button or function option is added to the air conditioner remote control or the air conditioner control APP. After the user presses or clicks, a refrigerant recovery command is sent to the air conditioner.

[0123] The first electric valve control module 52 is used to control the first electric valve to close; after the first electric valve is closed, the outdoor refrigerant cannot enter the indoor side. It can be understood that the first electric valve and the second electric valve are in the normally open mode, so the second electric valve is not specifically controlled to open here. Of course, for some special electric valves, the second electric valve needs to be controlled to open here, or the second electric valve is controlled to open to the maximum.

[0124] The target parameter acquisition module 53 is used to acquire target parameters; it is acquired through sensors, etc. In one embodiment, the target parameters are acquired once every preset period or in real time. In another embodiment, the target parameters are acquired after the first electric valve has been closed for a certain time.

[0125] Wherein, the target parameters include at least one of the following:

[0126] Low pressure, suction pressure, evaporation pressure and suction temperature. In actual use, low pressure is generally used because the feedback of low pressure is more direct, so the control speed is faster.

[0127] The second electric valve control module 54 is used to control the second electric valve to close and the compressor operation module 51 to control the compressor to close when the target parameter is less than the preset parameter value. When the target parameter is less than the preset parameter value. It indicates that the refrigerant on the indoor side has basically entered the outdoor side. At this time, the second electric valve is closed to prevent the outdoor refrigerant from flowing back to the indoor side.

[0128] As a preferred implementation manner of the present application, if the refrigerant recovery command is triggered because the refrigerant leakage sensor detects refrigerant leakage on the indoor side, at this time, when the refrigerant leakage sensor detects refrigerant leakage on the indoor side, the indoor fan is controlled to be in the on state. Control the indoor fan to turn on.

[0129] In addition, when any of the following conditions is triggered, the indoor fan is controlled to close:

[0130] The reading of the refrigerant leakage sensor is less than the threshold value;

[0131] The opening duration of the indoor fan is greater than the preset duration, and the opening duration is timed from the triggering of the refrigerant recovery command.

[0132] The air-conditioning control device provided by the embodiment of the present application, when triggering the refrigerant recovery command, first closes the first electric valve, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the target parameter is less than the preset parameter value, it means that the refrigerant on the indoor side has basically entered the outdoor side. At this time, the second electric valve is closed, and all the refrigerant on the indoor side is recovered to the outdoor side, which can reduce the safety risk when the refrigerant leaks or a fire occurs on the indoor side.

[0133] Based on the same inventive concept, as Figure 6 shown, the present application further provides an air-conditioning control system 60, including:

[0134] At least one processor 61 and at least one memory 62;

[0135] The memory stores the executable instructions of the processor;

[0136] The processor is configured to execute the air-conditioning control method provided by the above embodiment.

[0137] The air-conditioning control system provided by the embodiment of the present application stores the executable instructions of the processor through the memory. When the executable instructions are executed, the processor can first close the first electric valve when triggering the refrigerant recovery command, so that the refrigerant on the outdoor side cannot enter the indoor side. At this time, the second electric valve is opened, and the refrigerant on the indoor side enters the outdoor side. When the target parameter is less than the preset parameter value, it means that the refrigerant on the indoor side has basically entered the outdoor side. At this time, the second electric valve is closed, and all the refrigerant on the indoor side is recovered to the outdoor side, which can reduce the safety risk when the refrigerant leaks or a fire occurs on the indoor side.

[0138] It should be noted that in the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0139] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be seen in the same or similar content in other embodiments.

Claims

1. An air conditioner with automatic refrigerant recovery, including an outdoor side and an indoor side. The outdoor side includes a compressor, a condenser, and an electronic expansion valve. The indoor side includes an evaporator. One end of the evaporator is connected to the electronic expansion valve, and the other end is connected to the suction port of the compressor. It is characterized in that: A first electric valve and a second electric valve are provided on the outdoor side; The first electric valve is arranged on the pipeline between the exhaust port of the compressor and the evaporator; The second electric valve is arranged between the suction port of the compressor and the evaporator; When a refrigerant recovery instruction is triggered, the first electric valve is in a closed state and the second electric valve is in an open state; When the target parameter is less than the preset parameter value, the second electric valve changes from the open state to the closed state.

2. The air conditioner according to claim 1, characterized in that, It further includes: A refrigerant leakage sensor; The refrigerant leakage sensor is arranged on the indoor side and is used to detect whether there is refrigerant leakage on the indoor side.

3. The air conditioner according to claim 1, characterized in that, It further includes: A fire determination module; The fire determination module is used to determine whether a fire occurs in the space where the indoor side is located.

4. The air conditioner according to claim 1, characterized in that, The target parameter includes at least one of the following: Low pressure, suction pressure, evaporation pressure, and suction temperature.

5. An air conditioner control method, characterized in that, Applied to the air conditioner according to any one of claims 1-4, the method includes: When a refrigerant recovery instruction is triggered, control the compressor to be in an operating state; Control the first electric valve to close; Obtain the target parameter; When the target parameter is less than the preset parameter value, control the second electric valve to close and control the compressor to shut down.

6. The method according to claim 5, wherein: The step of controlling the compressor to be in an operating state when a refrigerant recovery instruction is triggered includes: When a refrigerant recovery instruction is triggered, obtain the operating state of the air conditioner; If the air conditioner is in a non-operating state, control the compressor to start.

7. The method according to claim 5, wherein It further includes: When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, trigger a refrigerant recovery instruction.

8. The method according to claim 5, characterized in that, It further includes: When it is determined that a fire occurs on the indoor side, trigger a refrigerant recovery instruction.

9. The method according to claim 5, characterized in that It further includes: When receiving a refrigerant recovery instruction sent by the user, trigger a refrigerant recovery instruction.

10. The method according to claim 7, wherein It further includes: When the refrigerant leakage sensor detects refrigerant leakage on the indoor side, control the fan on the indoor side to be in an on state.

11. The method according to claim 10, wherein It further includes: When any of the following conditions is triggered, control the fan on the indoor side to turn off: The reading of the refrigerant leakage sensor is less than the threshold; The opening duration of the fan on the indoor side is greater than the preset duration, and the opening duration is timed from the moment when the refrigerant recovery instruction is triggered.

12. An air conditioner control device, characterized in that, Applied to the air conditioner according to any one of claims 1-4, the device includes: A compressor operation module, configured to control the compressor to be in an operating state when a refrigerant recovery instruction is triggered; A first electric valve control module, configured to control the first electric valve to close; A target parameter acquisition module, configured to acquire the target parameter; A second electric valve control module, configured to control the second electric valve to close and control the compressor to shut down when the target parameter is less than the preset parameter value.

13. An air-conditioning control system, characterized in that, It includes: At least one processor and at least one memory; The memory stores executable instructions of the processor; The processor is configured to execute the method according to any one of claims 5-11.

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