Control method, control device and air conditioning system

Abstract

The invention provides a control method, a control device and an air conditioning system. The air conditioning system comprises an execution mechanism, and the control method comprises the steps that it is determined that refrigerant leakage happens to the air conditioning system, and the execution mechanism is controlled to execute conventional protection operation; and controlling the execution mechanism to execute the standby protection operation based on the abnormality of the conventional protection operation. According to the control method provided by the embodiment of the invention, when refrigerant leakage occurs in the air conditioning system, the execution mechanism is firstly controlled to execute the conventional protection operation, so that the safety risk caused by refrigerant leakage is reduced. In addition, when the conventional protection operation is abnormal, for example, the conventional protection operation does not take effect or does not take effect completely, the execution mechanism can be controlled to execute the standby protection operation, so that the safety risk caused by refrigerant leakage is reduced. Therefore, when refrigerant leakage happens to the air conditioning system, double countermeasures are taken, double protection can be achieved, and therefore the safety risks such as fire disasters and explosions caused by refrigerant leakage can be effectively reduced.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of air conditioning technology, and specifically refers to a control method, a control device, and an air conditioning system. Background Art

[0002] Currently, low-GWP (Global Warming Potential) refrigerants (such as R32, R454B, etc.) are increasingly used in air conditioning products. However, refrigerants such as R32 and R454B are flammable, and once refrigerant leakage occurs, there are safety risks, such as the possibility of fire or explosion. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a control method, a control device, and an air conditioning system that can take timely countermeasures when refrigerant leakage occurs, so as to reduce the safety risks caused by refrigerant leakage.

[0004] To this end, an embodiment of this application provides a control method for an air conditioning system, the air conditioning system includes an actuator, and the control method includes:

[0005] Determine that refrigerant leakage has occurred in the air conditioning system, and control the actuator to perform a conventional protection operation;

[0006] Based on an abnormality in the conventional protection operation, control the actuator to perform an emergency protection operation (standby protection operation).

[0007] The control method provided by the embodiment of this application can, when refrigerant leakage occurs in the air conditioning system, first control the actuator to perform a conventional protection operation to reduce the safety risks caused by refrigerant leakage. When an abnormality occurs in the conventional protection operation, such as the conventional protection operation does not take effect or does not fully take effect, the actuator can also be controlled to perform a standby protection operation to reduce the safety risks caused by refrigerant leakage. In this way, when refrigerant leakage occurs in the air conditioning system, there are dual countermeasures, which can achieve dual protection, thereby effectively reducing safety risks such as fire and explosion caused by refrigerant leakage.

[0008] An embodiment of this application also provides a control device, including a processor and a memory storing a computer program, and when the processor executes the computer program, the steps of the control method as described in any one of the above embodiments are implemented.

[0009] An embodiment of this application also provides an air conditioning system, including the control device as described in the above embodiment. Description of the Drawings

[0010] Figure 1 It is a flowchart of the control method provided by some embodiments of this application;

[0011] Figure 2 Partial structural schematic diagram of an air conditioning system provided for some embodiments of the present application;

[0012] Figure 3 For Figure 2 Flow schematic diagram of the control method of the air conditioning system shown;

[0013] Figure 4 Partial structural schematic diagram of an air conditioning system provided for other embodiments of the present application;

[0014] Figure 5 For Figure 4 Flow schematic diagram of the control method of the air conditioning system shown;

[0015] Figure 6 Partial structural schematic diagram of an air conditioning system provided for still other embodiments of the present application;

[0016] Figure 7 For Figure 6 Flow schematic diagram of the control method of the air conditioning system shown;

[0017] Figure 8 Partial structural schematic diagram of an air conditioning system provided for yet other embodiments of the present application;

[0018] Figure 9 For Figure 8 Flow schematic diagram of the control method of the air conditioning system shown.

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1 Compressor, 2 Outdoor heat exchanger, 3 Throttling device, 4 Indoor heat exchanger, 51 First electric control valve, 52 Second electric control valve, 53 Third electric control valve, 54 Fourth electric control valve, 55 Thermal fuse, 56 Pressure switch;

[0021] 71 Indoor side flow path, 72 Outdoor side flow path, 73 High pressure side pipeline, 74 Low pressure side pipeline, 75 Refrigerant discharge flow path. Detailed implementation manners

[0022] The principles and features of the present application will be described below with reference to the drawings. The examples given are only for explaining the present application and are not intended to limit the scope of the present application.

[0023] The embodiments of the present application provide a control method for an air conditioning system. The air conditioning system includes an actuator. Such as Figure 2 , Figure 4 , Figure 6 , Figure 8As shown, the actuator includes a refrigerant circulation circuit. The refrigerant circulation circuit corresponds to the unit of the air conditioning system. Refrigerant circulates within the refrigerant circulation circuit to achieve the cooling / heating function of the air conditioning system. The refrigerant circulation circuit includes components such as a compressor 1, an outdoor heat exchanger 2, a throttling device 3, and an indoor heat exchanger 4 connected by pipelines. The outdoor heat exchanger can be used for heat exchange with outdoor air. The indoor heat exchanger can be used for heat exchange with indoor air. The actuator may also include an outdoor fan (including a wind wheel and a motor) and an indoor fan (including a wind wheel and a motor). Among them, the compressor 1, the outdoor heat exchanger 2, the throttling device 3, and the outdoor fan can be called outdoor unit components. The indoor heat exchanger 4 and the indoor fan can be called indoor unit components. Of course, the outdoor unit components may also include other components, and the indoor unit components may also include other components. The refrigerant flow path formed by the outdoor unit components can be called the outdoor side flow path 72, and the refrigerant flow path formed by the indoor unit components can be called the indoor side flow path 71. In other words, the refrigerant circulation circuit includes the outdoor side flow path 72 and the indoor side flow path 71. The outdoor side flow path 72 may include components such as a compressor 1, an outdoor heat exchanger 2, and a throttling device 3 connected by pipelines. The indoor side flow path 71 may include components such as an indoor heat exchanger 4. The outdoor side flow path 72 and the indoor side flow path 71 are connected by pipelines to form a circuit. The refrigerant circulation circuit may also include a control valve, such as a four-way valve. The four-way valve can change the flow direction of the refrigerant in the refrigerant circulation circuit to achieve the switching of the cooling and heating functions. Of course, the refrigerant circulation circuit may not have the cooling and heating functions, but only have a single cooling function or a single heating function.

[0024] When the refrigerant circulation circuit operates, the compressor 1 outputs high-temperature and high-pressure refrigerant from the exhaust port, which flows through the condenser, the throttling device 3, and the evaporator in sequence, and then returns to the suction port of the compressor 1. When the air conditioning system operates in cooling mode (i.e., the refrigerant circulation circuit operates in the cooling mode), the outdoor heat exchanger 2 is the condenser, and the indoor heat exchanger 4 is the evaporator. When the air conditioning system operates in heating mode (i.e., the refrigerant circulation circuit operates in the heating mode), the outdoor heat exchanger 2 is the evaporator, and the indoor heat exchanger 4 is the condenser.

[0025] The air conditioning system can be a split air conditioner or an integrated air conditioner. A split air conditioner (such as a wall-mounted air conditioner, a cabinet air conditioner, etc.) includes an independent outdoor unit (including the above-mentioned outdoor unit components) and an indoor unit (including the above-mentioned indoor unit components). The outdoor unit is installed on the outdoor side, the indoor unit is installed on the indoor side, and the outdoor unit and the indoor unit are connected by pipelines. The outdoor unit and the indoor unit of an integrated air conditioner are combined into one, such as a window air conditioner, a rooftop air conditioner, etc.

[0026] The air conditioning system may further include a refrigerant detection sensor, which is used to detect the refrigerant concentration. Based on the detected refrigerant concentration result, it can be determined whether the refrigerant is leaking (the refrigerant detection sensor may determine the refrigerant leakage and then send it to the control device of the air conditioning system, or the control device may determine the refrigerant leakage based on the detection result of the refrigerant detection sensor). The refrigerant detection sensor may be an external unit component, or an internal unit component, or both the external unit component and the internal unit component may include the refrigerant detection sensor.

[0027] like Figure 1 As shown, the control method includes:

[0028] Step S102: determining that a refrigerant leak occurs in the air conditioning system, and controlling the actuator to perform a conventional protection operation;

[0029] Step S104: Based on the abnormality of the conventional protection operation, the actuator is controlled to perform the backup protection operation.

[0030] As the routine protection operation is normal, just wait for maintenance.

[0031] The control method provided in the embodiment of the present application can first control the actuator to perform conventional protection operations to reduce the safety risks caused by refrigerant leakage when a refrigerant leak occurs in the air-conditioning system. When an abnormality occurs in the conventional protection operation, such as when the conventional protection operation does not take effect or does not take effect completely, the actuator can also be controlled to perform backup protection operations to reduce the safety risks caused by refrigerant leakage. In this way, the air-conditioning system has dual response measures when a refrigerant leak occurs, and can achieve dual protection, thereby effectively reducing the safety risks such as fire and explosion caused by refrigerant leakage.

[0032] There are many reasons why the conventional protection operation may be abnormal, such as failure or even damage of some components, low anti-interference ability, interference from other components, or other reasons. The inventor of the present application realizes that the conventional protection operation may have various abnormalities and cannot be fully effective, so he thought of adding a backup protection operation procedure in addition to the conventional protection operation to implement emergency protection in an emergency and minimize the safety risks caused by refrigerant leakage.

[0033] In some exemplary embodiments, the actuator includes: a compressor 1 and an indoor fan (not shown in the figure).

[0034] Control actuators to perform routine protection operations, including:

[0035] Control compressor 1 to shut down and control the indoor fan to run.

[0036] In some embodiments, the actuator may further include a gas system (not shown in the figure), and the gas system can be used to achieve the heating function through gas heating. In this way, in the case of extremely low outdoor temperature, the heating function can also be achieved through the gas system to make up for the insufficient heating capacity of the refrigerant circulation loop. The gas system and the refrigerant circulation loop can be placed together or separately. The gas system may include a gas flow path and a gas valve, and the gas valve can be used to control the on-off of the gas flow path. Therefore, the on-off of the gas system can be controlled by controlling the opening and closing of the gas valve. The gas valve can be an on-off valve and can also have the function of regulating the gas flow rate.

[0037] The actuator may further include an electric auxiliary heating device (not shown in the figure), and the electric auxiliary heating device is used to achieve the heating function through electric heating. In this way, in the case of extremely low outdoor temperature, the heating function can also be assisted through the electric auxiliary heating device to make up for the insufficient heating capacity of the refrigerant circulation loop.

[0038] Controlling the actuator to perform the conventional protection operation may further include: controlling the electric auxiliary heating device and the gas system to close.

[0039] Among them, controlling the compressor 1 to close means: when the compressor 1 is in the running state, closing the compressor 1; when the compressor 1 is in the closed state, maintaining the closed state.

[0040] Similarly, controlling the electric auxiliary heating device to close means: when the electric auxiliary heating device is in the running state, closing the electric auxiliary heating device; when the electric auxiliary heating device is in the closed state, maintaining the closed state.

[0041] Controlling the gas system to close means: when the gas system is in the running state, closing the gas system; when the gas system is in the closed state, maintaining the closed state.

[0042] Controlling the indoor fan to run means: when the indoor fan is in the running state, maintaining the running state; when the indoor fan is in the closed state, starting the indoor fan.

[0043] Closing the compressor 1 is beneficial to avoid continuous leakage of the refrigerant. Closing the electric auxiliary heating device and the gas system is beneficial to avoid safety accidents such as fire or explosion caused by refrigerant leakage. Controlling the indoor fan to run is beneficial to disperse the refrigerant leaked to the indoor side and avoid safety accidents caused by too high local refrigerant concentration.

[0044] In some exemplary embodiments, the control method further includes:

[0045] Obtain the status of the actuator, and determine whether the normal protection operation is abnormal based on the status of the actuator. When the status of all the actuator components (i.e., the components that act based on the normal protection operation) conforms to the status set for the normal protection operation, the normal protection operation is normal; when the status of at least one actuator component does not conform to the status set for the normal protection operation, the normal protection operation is abnormal.

[0046] For example, when the actuator includes a compressor and an indoor fan:

[0047] Based on meeting at least one of the following conditions: the compressor is not stopped, the indoor fan is not running, it is determined that the normal protection operation is abnormal;

[0048] Based on the compressor being stopped and the indoor fan being running, it is determined that the normal protection operation is normal.

[0049] When the actuator also includes an electric auxiliary heating device and a gas system:

[0050] Based on meeting at least one of the following conditions: the compressor is not stopped, the indoor fan is not running, the electric auxiliary heating device is not turned off, the gas system is not closed, it is determined that the normal protection operation is abnormal;

[0051] Based on the compressor being stopped and the indoor fan being running and the electric auxiliary heating device being turned off and the gas system being closed, it is determined that the normal protection operation is normal.

[0052] In some exemplary embodiments, the actuator includes: a refrigerant circulation circuit and a switchable refrigerant discharge flow path 75, as Figure 2 , Figure 4 and Figure 6 shown. The first end of the refrigerant discharge flow path 75 is communicated with the refrigerant circulation circuit, and the second end of the refrigerant discharge flow path 75 is communicated with the outdoor environment.

[0053] Control the actuator to perform a standby protection operation, including: conducting the refrigerant discharge flow path 75 to discharge the refrigerant in the refrigerant circulation circuit to the outdoor environment.

[0054] The refrigerant circulation circuit corresponds to the unit of the air conditioning system, including structures such as a compressor 1, a condenser, a throttling device 3, an evaporator, etc. Refrigerant circulates in the refrigerant circulation circuit to realize the refrigeration / heating function of the air conditioning system. The refrigerant discharge flow path 75 is normally in a closed state and is only conducted in an emergency (i.e., when refrigerant leakage occurs and the normal protection operation is abnormal), so that the refrigerant in the refrigerant circulation circuit can be discharged to the outdoor environment, avoiding continuous refrigerant leakage into the room and causing safety risks such as fire and explosion due to high indoor refrigerant concentration.

[0055] In some embodiments, as Figure 2As shown, the refrigerant discharge flow path 75 is provided with a first electrically controlled valve 51, and the first electrically controlled valve 51 is arranged to control the on-off of the refrigerant discharge flow path 75. The first electrically controlled valve 51 can be an electromagnetic on-off valve. As Figure 3 shown, conducting the refrigerant discharge flow path 75 includes: opening the first electrically controlled valve 51 to conduct the refrigerant discharge flow path 75.

[0056] In some other embodiments, as Figure 4 shown, the refrigerant discharge flow path 75 is provided with a thermal fuse 55, and the thermal fuse 55 is arranged to block the refrigerant discharge flow path 75. As Figure 5 shown, conducting the refrigerant discharge flow path 75 includes: controlling the thermal fuse 55 to melt and disconnect to conduct the refrigerant discharge flow path 75.

[0057] By controlling the opening and closing of the first electrically controlled valve 51, the on-off control of the refrigerant discharge flow path 75 can be realized, with a simple structure and easy to control.

[0058] Alternatively, the first electrically controlled valve 51 can also be replaced with a thermal fuse 55. Under normal circumstances, the thermal fuse 55 blocks the refrigerant discharge flow path 75 to realize the shutdown of the refrigerant discharge flow path 75. In an emergency, the thermal fuse 55 can actively work, melt and disconnect by heating, so that the blocked refrigerant discharge flow path 75 is conducted. This solution also has the advantages of simple structure and easy to control.

[0059] In the above embodiments, the actuator can further include a power supply module (not shown in the figure). The power supply module is used to control the power on and off of the air conditioning system.

[0060] As Figure 3 and Figure 5 shown, controlling the actuator to perform the standby protection operation can further include:

[0061] After conducting the refrigerant discharge flow path 75, based on meeting the first power-off condition, controlling the power supply module to power off.

[0062] When the refrigerant discharge flow path 75 is conducted, the refrigerant in the refrigerant circulation loop will gradually be released into the outdoor environment, so the safety risk caused by refrigerant leakage will be greatly reduced. At this time, when the first power-off condition is met, the power supply module can be controlled to power off, then the entire air conditioning system is powered off and waiting for maintenance personnel to repair.

[0063] In some examples, the first power-off condition includes: the pressure P of the refrigerant circulation loop drops to within a first set range. The first set range can be denoted as: P < P1. The pressure P of the refrigerant circulation loop can be the refrigerant pressure of the indoor-side flow path 71, which is beneficial to ensuring that the indoor-side flow path 71 will not continue to leak refrigerant into the room and is beneficial to improving safety.

[0064] When the pressure of the refrigerant circulation circuit drops to within the first set range, it indicates that the refrigerant in the refrigerant circulation circuit has been basically emptied, and it will not cause safety risks such as fire and explosion. Therefore, the air-conditioning system can be powered off and wait for maintenance.

[0065] Among them, P1 cannot be too large to avoid excessive refrigerant residue in the air-conditioning system, nor can P1 be too small to avoid outside air being sucked back into the compressor 1, causing the compressor 1 to compress air and resulting in damage to the compressor 1. It can be 0 bar < P1 ≤ 1 bar, such as 0.1 bar, 0.2 bar, 0.4 bar, 0.5 bar, 0.6 bar, 0.8 bar, 1 bar, etc.

[0066] Of course, the first power-off condition is not limited to the above content. For example, it can also be: the refrigerant discharge flow path 75 is conducted for a set duration, or the refrigerant concentration in the refrigerant discharge flow path 75 is lower than the set value, or the refrigerant concentration at the outlet of the refrigerant discharge flow path 75 is lower than the set value. These conditions can all indicate that the refrigerant in the refrigerant circulation circuit has been basically emptied, and thus can all be used as the basis for powering off the entire air-conditioning system.

[0067] In some other embodiments, as Figure 6 shown, the refrigerant circulation circuit includes a compressor 1, a high-pressure side pipeline 73 connected to the exhaust port of the compressor 1, a low-pressure side pipeline 74 connected to the suction port of the compressor 1, and a second electric control valve 52 provided on the high-pressure side pipeline 73. The refrigerant discharge flow path 75 is connected to the high-pressure side pipeline 73, and the refrigerant discharge flow path 75 is provided with a normally closed pressure switch 56. The second electric control valve 52 can be an electromagnetic on-off valve. The second electric control valve 52 can be an electromagnetic on-off valve located between the output end of the outdoor side flow path 72 and the input end of the indoor side flow path 71. The second electric control valve 52 can also be integrated with the throttling device 3, that is: the throttling device 3 is an electric control valve with both an opening degree adjustment function and an on-off function.

[0068] As Figure 7 shown, conducting the refrigerant discharge flow path 75 includes: closing the second electric control valve 52 and controlling the compressor 1 to operate to increase the pressure of the high-pressure side pipeline 73 to open the pressure switch 56.

[0069] Among them, controlling the operation of the compressor 1 means: when the compressor 1 is in the operating state, continue to maintain the operating state; when the compressor 1 is in the off state, start the compressor 1 to make the compressor 1 in the operating state. These two situations depend on the degree of abnormality of the conventional protection operation. When the conventional protection operation is abnormal and the compressor 1 does not shut down normally, in the standby protection operation, the compressor 1 can continue to maintain the operating state. When the conventional protection operation is abnormal and the compressor 1 shuts down, in the standby protection operation, the compressor 1 needs to be restarted to keep the compressor 1 in the operating state, so as to provide power for the refrigerant, enable the refrigerant in the indoor-side flow path 71 to flow back to the compressor 1, and be discharged to the outdoor environment through the refrigerant discharge flow path 75. When performing the standby protection operation, the states of the indoor fan, the electric auxiliary heating device, and the gas system are not restricted and can be carried out in place during the conventional protection operation or not carried out in place.

[0070] In other words, conducting the refrigerant discharge flow path 75 includes:

[0071] Based on the fact that the compressor 1 does not shut down, close the second electric control valve 52, and control the operation of the compressor 1 to increase the pressure in the high-pressure side pipeline 73 to open the pressure switch 56;

[0072] Based on the fact that the compressor 1 shuts down, close the second electric control valve 52, start the compressor 1 to increase the pressure in the high-pressure side pipeline 73 to open the pressure switch 56;

[0073] The refrigerant pressure in the high-pressure side pipeline 73 is relatively high, and the refrigerant pressure in the low-pressure side pipeline 74 is relatively low. The refrigerant discharge flow path 75 is connected to the high-pressure side pipeline 73, and the pressure switch 56 is provided in the refrigerant discharge flow path 75. The pressure switch 56 is in the closed state when the pressure is lower than its set threshold; it is in the open state when the pressure is greater than or equal to its set threshold.

[0074] Under normal circumstances, the second electric control valve 52 is in the open state to ensure the normal operation of the refrigerant circulation loop; the pressure switch 56 is in the closed state, and the refrigerant discharge flow path 75 is in the off state. In an emergency (that is, refrigerant leakage occurs and the conventional protection operation is abnormal), close the second electric control valve 52, so that the refrigerant in the high-pressure side pipeline 73 cannot flow to the low-pressure side pipeline 74, and the compressor 1 continues to operate, continuously discharging high-pressure refrigerant into the high-pressure side pipeline 73, so that the refrigerant pressure in the high-pressure side pipeline 73 will become higher and higher. When the refrigerant pressure reaches the set threshold of the pressure switch 56, the pressure switch 56 operates to open, and the refrigerant discharge flow path 75 is conducted.

[0075] In some embodiments, the control method further includes: based on the abnormality of the conventional protection operation, shielding the high-pressure protection mode of the air-conditioning system.

[0076] The high-pressure protection mode of the air-conditioning system is a protection mechanism used to prevent damage to the air-conditioning system caused by high-pressure operation. When the pressure in the refrigerant circulation loop of the air-conditioning system exceeds the set safety range, the high-pressure protection mode will be automatically triggered. The high-pressure protection mode usually occurs when the load of the compressor 1 is too large, the refrigerant is blocked or overheated, etc. However, the refrigerant does not leak. The set pressure threshold of the high-pressure protection mode is less than the set pressure threshold of the above-mentioned pressure switch 56.

[0077] In this way, when there is no refrigerant leakage, when the pressure in the refrigerant circulation loop rises to the set pressure threshold of the high-pressure protection mode, the high-pressure protection mode can be activated without accidentally opening the pressure switch 56 and causing the refrigerant to be discharged into the external environment. When refrigerant leakage occurs, although the pressure in the high-pressure side pipeline 73 will rise to the set pressure threshold of the pressure switch 56. During the pressure rise process, it will pass through the set pressure threshold of the high-pressure protection mode, but the high-pressure protection mode will not be activated. Instead, the high-pressure protection mode will be blocked and the standby protection operation will be executed, and the pressure in the refrigerant circulation loop will be discharged to the outdoor environment through the refrigerant discharge flow path 75 to avoid safety accidents caused by refrigerant leakage.

[0078] In some embodiments, controlling the actuator to perform the standby protection operation further includes:

[0079] Before conducting the refrigerant discharge flow path 75, determine whether the refrigerant circulation loop is operating in the cooling mode;

[0080] Based on the refrigerant circulation loop operating in the cooling mode, perform the step of conducting the refrigerant discharge flow path 75;

[0081] Based on the refrigerant circulation loop not operating in the cooling mode, first control the refrigerant circulation loop to switch to the cooling mode, and then perform the step of conducting the refrigerant discharge flow path 75.

[0082] This can ensure that after the refrigerant discharge flow path 75 is conducted, the refrigerant flow direction in the refrigerant circulation loop is the refrigerant flow direction in the cooling mode, that is, the refrigerant output by the compressor 1 first flows to the outdoor heat exchanger 2, and then flows to the indoor heat exchanger 4, and the refrigerant in the indoor heat exchanger 4 flows to the suction port of the compressor 1. This can ensure that during the process of discharging the refrigerant through the refrigerant discharge flow path 75, the refrigerant in the indoor heat exchanger 4 is sucked back into the compressor 1, and the refrigerant on the outdoor side cannot flow to the indoor side heat exchanger due to the closing of the second electric control valve 52, which is beneficial to quickly empty the refrigerant in the indoor side flow path 71 to avoid a large amount of refrigerant leakage into the indoor space.

[0083] Therefore, before conducting the refrigerant discharge flow path 75, first determine whether the refrigerant circulation loop is operating in the cooling mode. If so, the refrigerant discharge flow path 75 can be conducted. If not, for example, when operating in the heating mode, first switch back to the cooling mode, and then conduct the refrigerant discharge flow path 75.

[0084] Of course, for a single-cooling air conditioner, the refrigerant circulation circuit does not operate in the heating mode, so there is no need to determine whether the refrigerant circulation circuit operates in the cooling mode.

[0085] In the above embodiment, the actuator may further include a power supply module to control the actuator to perform a standby protection operation, such as Figure 7 shown, may further include:

[0086] After the refrigerant discharge flow path 75 is opened, based on meeting the second power-off condition, the compressor 1 is controlled to stop, and the power supply module is controlled to cut off the power.

[0087] When the refrigerant discharge flow path 75 is opened, the refrigerant in the refrigerant circulation circuit will gradually be released into the outdoor environment, so the safety risk caused by refrigerant leakage will be greatly reduced. At this time, when the second power-off condition is met, the compressor 1 can be controlled to stop, and the power supply module can be controlled to cut off the power, then the entire air-conditioning system is powered off and waits for the maintenance personnel to repair.

[0088] In some examples, the second power-off condition includes: the pressure P of the refrigerant circulation circuit drops to within a second set range. The second set range can be denoted as: P < P2. The pressure P of the refrigerant circulation circuit can be the refrigerant pressure of the indoor-side flow path 71, which is beneficial to ensuring that the indoor-side flow path 71 does not continue to leak refrigerant into the room and is beneficial to improving safety.

[0089] When the pressure of the refrigerant circulation circuit drops to within the second set range, it indicates that the refrigerant in the refrigerant circulation circuit has been basically emptied and will not cause safety risks such as fire and explosion. Therefore, the air-conditioning system can be powered off and wait for repair.

[0090] Among them, P2 cannot be too large to avoid excessive refrigerant residue in the air-conditioning system, and P2 cannot be too small to avoid outside air being drawn into the compressor 1 and causing the compressor 1 to compress air and damage the compressor 1. It can be that 0 bar < P2 ≤ 1 bar, such as 0.1 bar, 0.2 bar, 0.4 bar, 0.5 bar, 0.6 bar, 0.8 bar, 1 bar, etc.

[0091] Of course, the second power-off condition is not limited to the above content. For example, it can also be: the refrigerant discharge flow path 75 is opened for a set duration, or the refrigerant concentration in the refrigerant discharge flow path 75 is lower than the set value, or the refrigerant concentration at the outlet of the refrigerant discharge flow path 75 is lower than the set value. These conditions can all indicate that the refrigerant in the refrigerant circulation circuit has been basically emptied, and thus can all be used as the basis for powering off the entire air-conditioning system.

[0092] In some other exemplary embodiments, such as Figure 8As shown in the figure, the actuator includes a refrigerant circulation circuit. The refrigerant circulation circuit includes an outdoor-side flow path 72 and an indoor-side flow path 71 connected by pipes. The outdoor-side flow path 72 includes the refrigerant flow path constituted by the above-mentioned outdoor unit components. The indoor-side flow path 71 includes the refrigerant flow path constituted by the above-mentioned indoor unit components and is used for heat exchange with indoor air.

[0093] Controlling the actuator to perform a standby protection operation includes: recovering the refrigerant in the indoor-side flow path 71 to the outdoor-side flow path 72.

[0094] When refrigerant leakage occurs, due to limited indoor space and many factors that are likely to cause fire or explosion, avoiding continuous refrigerant leakage into the indoor space can reduce the safety risks caused by refrigerant leakage. For this reason, in this solution, by reducing the refrigerant in the indoor-side flow path 71 and recovering the refrigerant in the indoor-side flow path 71 to the outdoor-side flow path 72, continuous refrigerant leakage into the indoor space is avoided, thereby reducing the safety risks caused by refrigerant leakage.

[0095] Compared with discharging the refrigerant to the outdoor environment through the refrigerant discharge flow path 75, this solution can realize the recycling of the refrigerant, which is beneficial to reducing the refrigerant filling amount during the maintenance process and conforms to the concept of green energy conservation and environmental protection.

[0096] In some embodiments, as Figure 8 shown, the indoor-side flow path 71 includes an indoor heat exchanger 4. The outdoor-side flow path 72 includes a compressor 1, an outdoor heat exchanger 2, a third electric control valve 53, and a fourth electric control valve 54. The compressor 1, the outdoor heat exchanger 2, the third electric control valve 53, the indoor heat exchanger 4, and the fourth electric control valve 54 are connected in sequence by pipes. The third electric control valve 53 and the fourth electric control valve 54 can be electromagnetic on-off valves.

[0097] In the refrigeration mode, the third electric control valve 53 is a refrigerant output valve, and the fourth electric control valve 54 is a refrigerant input valve. The refrigerant input valve is set to control the on-off between the output end of the indoor-side flow path 71 and the input end of the outdoor-side flow path 72. The refrigerant output valve is set to control the on-off between the output end of the outdoor-side flow path 72 and the input end of the indoor-side flow path 71.

[0098] As Figure 9 shown, recovering the refrigerant in the refrigerant circulation circuit to the outdoor-side flow path 72 includes:

[0099] Based on the refrigerant circulation circuit operating in the refrigeration mode, close the third electric control valve 53 and control the compressor 1 to operate;

[0100] Based on meeting the set conditions, close the fourth electric control valve 54 and the compressor 1 to recover the refrigerant in the indoor-side flow path 71 to the outdoor-side flow path 72.

[0101] Among them, controlling the operation of the compressor 1 means: when the compressor 1 is in the operating state, it continues to maintain the operating state; when the compressor 1 is in the closed state, the compressor 1 is started to make the compressor 1 in the operating state. These two situations depend on the degree of abnormality of the conventional protection operation. When the conventional protection operation is abnormal and the compressor 1 does not shut down normally, in the standby protection operation, the compressor 1 just continues to maintain the operating state. When the conventional protection operation is abnormal and the compressor 1 shuts down, in the standby protection operation, the compressor 1 needs to be restarted to make the compressor 1 maintain the operating state to provide power for the refrigerant so that the refrigerant in the indoor side flow path 71 can flow back to the compressor 1 and be discharged to the outdoor environment through the refrigerant discharge flow path 75. When performing the standby protection operation, the states of the indoor fan, the electric auxiliary heating device, and the gas system are not restricted and can be carried out in place in the conventional protection operation or not carried out in place.

[0102] In other words, recovering the refrigerant in the refrigerant circulation loop to the outdoor side flow path 72 includes:

[0103] Based on the compressor 1 not shutting down, the third electronic control valve 53 is closed, and after meeting the set conditions, the fourth electronic control valve 54 and the compressor 1 are closed so that the refrigerant in the indoor side flow path 71 is recovered to the outdoor side flow path 72;

[0104] Based on the compressor 1 shutting down, the third electronic control valve 53 is closed, the compressor 1 is started, and after meeting the set conditions, the fourth electronic control valve 54 and the compressor 1 are closed so that the refrigerant in the indoor side flow path 71 is recovered to the outdoor side flow path 72.

[0105] Under normal circumstances, both the third electronic control valve 53 and the fourth electronic control valve 54 are in the open state to ensure the normal operation of the refrigerant circulation loop. In an emergency (that is, when refrigerant leakage occurs and the conventional protection operation is abnormal), when the compressor 1 does not shut down, the third electronic control valve 53 is first closed, while the fourth electronic control valve 54 remains open, so that the refrigerant in the outdoor side flow path 72 cannot flow to the indoor side flow path 71, and the refrigerant in the indoor side flow path 71 can continue to flow to the outdoor side flow path 72 under the drive of the compressor 1. When the set conditions are met, it indicates that the refrigerant in the indoor side flow path 71 has been basically emptied and recovered to the outdoor side flow path 72. Therefore, the fourth electronic control valve 54 and the compressor 1 are closed, thereby realizing the recovery of the refrigerant in the indoor side flow path 71 to the outdoor side flow path 72.

[0106] In an emergency (i.e., when there is a refrigerant leak and the normal protection operation is abnormal), when the compressor 1 has stopped, in order to recover the refrigerant to the outdoor side flow path 72, it is necessary to start the compressor 1 to provide the driving force for the refrigerant flow, and close the third electronic control valve 53, while the fourth electronic control valve 54 remains open, so that the refrigerant in the outdoor side flow path 72 cannot flow to the indoor side flow path 71, and the refrigerant in the indoor side flow path 71 will continue to flow to the outdoor side flow path 72 under the drive of the compressor 1. When the set conditions are met, it indicates that the refrigerant in the indoor side flow path 71 has been basically emptied and recovered to the outdoor side flow path 72. Therefore, the fourth electronic control valve 54 and the compressor 1 are closed, thereby realizing the recovery of the refrigerant to the outdoor side flow path 72.

[0107] In some examples, the set conditions include: the pressure Pin in the indoor side flow path 71 is reduced to within a third set range. The third set range can be denoted as: Pin < P3. P3 can be within but not limited to the range less than 1 bar, such as 0.1 bar, 0.2 bar, 0.4 bar, 0.5 bar, 0.6 bar, 0.8 bar, 0.9 bar, etc.

[0108] When the pressure of the refrigerant circulation circuit is reduced to within the third set range, it indicates that the refrigerant in the refrigerant circulation circuit has been basically recovered to the outdoor side flow path 72, and will not cause safety risks such as fire and explosion. Therefore, the refrigerant input valve and the compressor 1 can be closed.

[0109] Of course, the set conditions are not limited to the above content. For example, it can also be: the refrigerant output valve is closed for a set duration, or the flow rate of the refrigerant input valve is lower than the set value, or the refrigerant concentration in the refrigerant input valve is lower than the set value. These conditions can all indicate that the refrigerant in the indoor side flow path 71 has been basically recovered to the outdoor side flow path 72, and thus can all be used as the basis for closing the refrigerant input valve and the compressor 1.

[0110] In some embodiments, controlling the actuator to perform the standby protection operation further includes:

[0111] Before closing the third electronic control valve 53 and controlling the operation of the compressor 1, it is judged whether the refrigerant circulation circuit is operating in the refrigeration mode;

[0112] Based on the refrigerant circulation circuit operating in the refrigeration mode, perform the steps of closing the third electronic control valve 53 and controlling the operation of the compressor 1;

[0113] Based on the refrigerant circulation circuit not operating in the refrigeration mode, first control the refrigerant circulation circuit to switch to the refrigeration mode, and then perform the steps of closing the third electronic control valve 53 and controlling the operation of the compressor 1.

[0114] This can ensure that after the third electronic control valve 53 is closed and the compressor 1 is controlled to operate, the refrigerant flow direction in the refrigerant circulation circuit is the refrigerant flow direction in the cooling mode, that is, the refrigerant output by the compressor 1 first flows to the outdoor heat exchanger 2, then flows to the indoor heat exchanger 4, and the refrigerant in the indoor heat exchanger 4 flows to the suction port of the compressor 1. This can ensure that during the process of recovering the refrigerant in the indoor side flow path 71 to the outdoor side flow path 72, the refrigerant in the indoor side flow path 71 can flow to the outdoor side flow path 72 because the fourth electronic control valve 54 is opened, while the refrigerant in the outdoor side flow path 72 cannot flow to the indoor side flow path 71 because the third electronic control valve 53 is closed. This is beneficial to quickly empty the refrigerant in the indoor side flow path 71 to avoid a large amount of refrigerant leakage into the indoor space.

[0115] Therefore, before closing the third electronic control valve 53 and controlling the compressor 1 to operate, first determine whether the refrigerant circulation circuit is operating in the cooling mode. If so, the third electronic control valve 53 can be closed and the compressor 1 can be controlled to operate. If not, for example, if it is operating in the heating mode, first switch back to the cooling mode, and then close the third electronic control valve 53 and control the compressor 1 to operate.

[0116] Of course, for a single-cooling air conditioner, the refrigerant circulation circuit will not operate in the heating mode, so there is no need to determine whether the refrigerant circulation circuit is operating in the cooling mode.

[0117] In the above embodiment, as Figure 9 shown, the actuator may further include a power module to control the actuator to perform the standby protection operation, and may further include:

[0118] After the refrigerant in the indoor side flow path 71 is recovered to the outdoor side flow path 72, control the power module to cut off the power.

[0119] After the refrigerant in the indoor side flow path 71 is recovered to the outdoor side flow path 72, it will not cause safety risks such as fire and explosion. Therefore, the air-conditioning system can cut off the power and wait for maintenance.

[0120] The embodiment of the present application also provides a control device, including a processor and a memory storing a computer program. When the processor executes the computer program, it implements the steps of the control method in any of the above embodiments, and thus has all the above beneficial effects, which will not be elaborated here.

[0121] The processor may be an integrated circuit chip with the ability to process signals. The above-mentioned processor may be a general-purpose processor, including a Central Processing Unit (CPU for short), a Network Processor (NP for short), etc.; it may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0122] The embodiment of the present application also provides an air-conditioning system, including the control device as described in the above embodiment, and thus has all the above beneficial effects, which will not be elaborated here.

[0123] The embodiment of the present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, it implements the steps of the control method in any one of the above embodiments, and thus has all the above beneficial effects, which will not be elaborated here.

[0124] Four embodiments are introduced below.

[0125] Embodiment 1 (as shown in Figure 2 and Figure 3 shown)

[0126] The air-conditioning system includes: a refrigerant circulation circuit, a refrigerant discharge flow path 75, a gas system, an electric auxiliary heating device, an indoor fan, an outdoor fan and other structures. The refrigerant circulation circuit includes a compressor 1, an outdoor heat exchanger 2, a throttling device 3, an indoor heat exchanger 4 and other structures.

[0127] The gas system includes a gas on-off valve. The refrigerant discharge flow path 75 is provided with a first electric control valve 51, and the first electric control valve 51 is an electromagnetic on-off valve. The first end of the refrigerant discharge flow path 75 is communicated with the refrigerant circulation circuit, and the second end is communicated with the external environment.

[0128] When refrigerant leakage occurs, the conventional protection operations include: controlling the compressor 1 to stop, controlling the electric auxiliary heating device to turn off, controlling the gas on-off valve to close to shut down the gas system, and controlling the indoor fan to operate.

[0129] When the conventional protection operation is abnormal, for example, at least one of the following situations occurs: the compressor 1 does not stop, the electric auxiliary heating device does not stop, the gas does not stop, the indoor fan is not turned on, then the standby protection operation is executed.

[0130] The standby protection operation includes: opening the first electronic control valve 51 to discharge the refrigerant in the refrigerant circulation loop to the external environment, preventing more refrigerant from entering the room and implementing emergency protection. When the pressure in the indoor-side flow path 71 is detected to drop to within the first set range, the air-conditioning system automatically cuts off the power supply and waits for repair.

[0131] Embodiment 2 (as Figure 4 and Figure 5 shown)

[0132] The difference from Embodiment 1 is that the first electronic control valve 51 is replaced by a thermal fuse 55.

[0133] The standby protection operation includes: controlling the thermal fuse 55 to melt and disconnect to conduct the refrigerant discharge flow path 75, discharging the refrigerant in the refrigerant circulation loop to the external environment, preventing more refrigerant from entering the room and implementing emergency protection. When the pressure in the indoor-side flow path 71 is detected to drop to within the first set range, the air-conditioning system automatically cuts off the power supply and waits for repair.

[0134] Embodiment 3 (as Figure 6 and Figure 7 shown)

[0135] The difference from Embodiment 1 is that the refrigerant circulation loop includes a compressor 1, a high-pressure side pipeline 73 connected to the exhaust port of the compressor 1, a low-pressure side pipeline 74 connected to the suction port of the compressor 1, and a second electronic control valve 52 provided on the high-pressure side pipeline 73; the refrigerant discharge flow path 75 is connected to the high-pressure side pipeline 73, and a normally closed pressure switch 56 is provided on the refrigerant discharge flow path 75. The second electronic control valve 52 can be integrated with the throttling device 3, or a second electronic control valve 52 can be additionally provided between the output end of the outdoor-side flow path 72 and the input end of the indoor-side flow path 71.

[0136] The standby protection operation includes: determining whether the refrigerant circulation loop is operating in the cooling mode. If not, first switch to the cooling mode. Based on the refrigerant circulation loop operating in the cooling mode: 1) If the compressor 1 has not stopped, close the second electronic control valve 52 and control the compressor 1 to operate to increase the pressure in the high-pressure side pipeline 73 to open the pressure switch 56; 2) If the compressor 1 has stopped, close the second electronic control valve 52 and start the compressor 1 to increase the pressure in the high-pressure side pipeline 73 to open the pressure switch 56. When the pressure in the indoor-side flow path 71 is detected to drop to within the second set range, turn off the compressor 1 and cut off the power supply and wait for repair.

[0137] Embodiment 4 (as Figure 8 and Figure 9 shown)

[0138] The difference from Embodiment 1 is that the refrigerant discharge flow path 75 is cancelled, and a third electronic control valve 53 and a fourth electronic control valve 54 are provided.

[0139] The standby protection operation includes: determining whether the refrigerant circulation circuit is operating in the refrigeration mode. If not, switch to the refrigeration mode first. Based on the refrigerant circulation circuit operating in the refrigeration mode: 1) If the compressor 1 has not stopped, close the third electric control valve 53 and control the compressor 1 to operate so that the refrigerant in the indoor side flow path 71 is recovered into the outdoor side flow path 72; 2) If the compressor 1 has stopped, close the third electric control valve 53 and start the compressor 1 so that the refrigerant in the indoor side flow path 71 is recovered into the outdoor side flow path 72. When it is detected that the pressure in the indoor side flow path 71 drops to within the third set range, close the fourth electric control valve 54 and the compressor 1, and cut off the power supply and wait for maintenance.

[0140] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0141] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0142] In the present application, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0143] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

[0144] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0145] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to this application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0146] In any one or more of the above exemplary embodiments, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions can be stored on or transmitted via a computer-readable medium as one or more instructions or codes and executed by a hardware-based processing unit. The computer-readable medium can include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium including any medium that facilitates a computer program, for example, to be transmitted from one place to another according to a communication protocol. In this way, the computer-readable medium generally corresponds to a non-transitory tangible computer-readable storage medium or a communication medium such as a signal or a carrier wave. The data storage medium can be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the technologies described in this disclosure. A computer program product can include a computer-readable medium.

[0147] By way of example, and not limitation, such computer-readable storage media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection can be termed a computer-readable medium. By way of example, if instructions are transmitted using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. However, it should be understood that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transient media, but are directed to non-transient, tangible storage media. As used herein, disk and optical disks include compact disk (CD), laser disk, optical disk, digital versatile disk (DVD), floppy disk, or Blu-ray disk, etc., where disks typically reproduce data magnetically, while optical disks use lasers to optically reproduce data. Combinations of the above should also be included within the scope of computer-readable media.

[0148] By way of example, the instructions can be executed by one or more processors, such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, as used herein, the term "processor" can refer to any one of the foregoing structures or any other structure suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein can be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques can be fully implemented in one or more circuits or logic elements.

[0149] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or apparatuses, including wireless handsets, integrated circuits (ICs), or a group of ICs (e.g., a chipset). The various components, modules, or units described in the embodiments of the present disclosure are emphasized to highlight the functional aspects of the devices configured to perform the described techniques, but do not necessarily need to be implemented by different hardware units. Rather, as described above, the various units can be combined in a codec hardware unit or provided by a collection of interoperating hardware units, including one or more processors as described above, in conjunction with appropriate software and / or firmware.

Claims

1. A control method for an air-conditioning system, characterized in that, the air-conditioning system includes an actuator, and the control method includes: determining that a refrigerant leak occurs in the air-conditioning system, and controlling the actuator to perform a conventional protection operation; based on an abnormality occurring in the conventional protection operation, controlling the actuator to perform a standby protection operation.

2. The control method according to claim 1, characterized in that, the actuator includes: a refrigerant circulation circuit and an on-off refrigerant discharge flow path, a first end of the refrigerant discharge flow path is communicated with the refrigerant circulation circuit, and a second end of the refrigerant discharge flow path is communicated with the outdoor environment; the controlling the actuator to perform the standby protection operation includes: turning on the refrigerant discharge flow path to discharge the refrigerant in the refrigerant circulation circuit to the outdoor environment.

3. The control method according to claim 2, characterized in that, the refrigerant discharge flow path is provided with a first electric control valve, and the first electric control valve is configured to control the on-off of the refrigerant discharge flow path; the turning on the refrigerant discharge flow path includes: opening the first electric control valve to turn on the refrigerant discharge flow path; or the refrigerant discharge flow path is provided with a thermal fuse, and the thermal fuse is configured to block the refrigerant discharge flow path; the turning on the refrigerant discharge flow path includes: controlling the thermal fuse to melt and disconnect to turn on the refrigerant discharge flow path.

4. The control method according to claim 3, characterized in that, the actuator further includes a power supply module, and the controlling the actuator to perform the standby protection operation further includes: after turning on the refrigerant discharge flow path, based on meeting a first power-off condition, controlling the power supply module to power off.

5. The control method according to claim 4, characterized in that, the first power-off condition includes: the pressure of the refrigerant circulation circuit drops to a first set range.

6. The control method according to claim 2, characterized in that, the refrigerant circulation circuit includes a compressor, a high-pressure side pipeline connected to the exhaust port of the compressor, a low-pressure side pipeline connected to the suction port of the compressor, and a second electric control valve provided on the high-pressure side pipeline; the refrigerant discharge flow path is connected to the high-pressure side pipeline, and the refrigerant discharge flow path is provided with a normally closed pressure switch; the turning on the refrigerant discharge flow path includes: closing the second electric control valve and controlling the compressor to operate to increase the pressure of the high-pressure side pipeline to open the pressure switch.

7. The control method according to claim 6, characterized in that, the controlling the actuator to perform the standby protection operation further includes: before turning on the refrigerant discharge flow path, determining whether the refrigerant circulation circuit is operating in a refrigeration mode; based on the refrigerant circulation circuit operating in the refrigeration mode, performing the step of turning on the refrigerant discharge flow path; based on the refrigerant circulation circuit not operating in the refrigeration mode, first controlling the refrigerant circulation circuit to switch to the refrigeration mode, and then performing the step of turning on the refrigerant discharge flow path.

8. The control method according to claim 6, characterized in that, The actuator further includes a power supply module. Controlling the actuator to perform a standby protection operation further includes: After the refrigerant discharge flow path is turned on, based on meeting the second power-off condition, controlling the compressor to stop and controlling the power supply module to cut off power.

9. The control method according to claim 8, wherein, the second power-off condition includes: the pressure of the refrigerant circulation circuit is reduced to a second set range.

10. The control method according to claim 1, wherein, the actuator includes: a refrigerant circulation circuit, and the refrigerant circulation circuit includes an outdoor side flow path and an indoor side flow path connected by a pipeline; Controlling the actuator to perform a standby protection operation includes: recovering the refrigerant in the indoor side flow path to the outdoor side flow path.

11. The control method according to claim 10, wherein, the indoor side flow path includes an indoor heat exchanger; the outdoor side flow path includes a compressor, an outdoor heat exchanger, a third electronic control valve, and a fourth electronic control valve, and the compressor, the outdoor heat exchanger, the third electronic control valve, the indoor heat exchanger, and the fourth electronic control valve are connected in sequence by a pipeline; Recovering the refrigerant in the indoor side flow path to the outdoor side flow path includes: Based on the refrigerant circulation circuit operating in the refrigeration mode, closing the third electronic control valve and controlling the compressor to operate; After meeting the set conditions, closing the fourth electronic control valve and the compressor so that the refrigerant in the indoor side flow path is recovered to the outdoor side flow path.

12. The control method according to claim 11, wherein, Controlling the actuator to perform a standby protection operation further includes: Before closing the third electronic control valve and controlling the compressor to operate, determining whether the refrigerant circulation circuit is operating in the refrigeration mode; Based on the refrigerant circulation circuit operating in the refrigeration mode, performing the step of closing the third electronic control valve and controlling the compressor to operate; Based on the refrigerant circulation circuit not operating in the refrigeration mode, first controlling the refrigerant circulation circuit to switch to the refrigeration mode, and then performing the step of closing the third electronic control valve and controlling the compressor to operate.

13. The control method according to claim 11, wherein, the set conditions include: the pressure of the indoor side flow path is reduced to a third set range.

14. The control method according to claim 11, wherein, The actuator further includes a power supply module. Controlling the actuator to perform a standby protection operation further includes: After the refrigerant in the indoor side flow path is recovered to the outdoor side flow path, controlling the power supply module to cut off power.

15. The control method according to any one of claims 1 to 14, wherein, the actuator includes: a compressor and an indoor fan; Controlling the actuator to perform a conventional protection operation includes: Controlling the compressor to close and controlling the indoor fan to operate.

16. The control method according to claim 15, wherein, The actuator further includes: an electric auxiliary heating device; the control for the actuator to perform a conventional protection operation further includes: controlling the electric auxiliary heating device to turn off; and / or The actuator further includes: a gas system; the control for the actuator to perform a conventional protection operation further includes: controlling the gas system to turn off.

17. A control device, characterized in that, it includes a processor and a memory storing a computer program, and when the processor executes the computer program, the steps of the control method according to any one of claims 1 to 16 are implemented.

18. An air conditioning system, characterized in that, it includes the control device according to claim 17.

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