Refrigerant circulation system for air suspension compressor and control method and device of refrigerant circulation system

Abstract

The invention provides a refrigerant circulation system for an air suspension compressor and a control method and device of the refrigerant circulation system. The system comprises a main refrigerant loop provided with an air suspension compressor, a condenser, an evaporator and an electronic expansion valve which are sequentially connected, a first inlet is formed in an air bearing of the air suspension compressor, a first outlet is formed in a machine body of the air suspension compressor, and the first inlet and the first outlet are both communicated to a cavity in the machine body; an outlet of the condenser is communicated to the first inlet through the liquid supply pipeline, and the first outlet is communicated to the evaporator through the liquid discharge pipeline; a pump body is arranged on the liquid supply pipeline, an exhaust pipeline communicated to the evaporator is further arranged on the liquid supply pipeline, and an exhaust valve is arranged on the exhaust pipeline. Through accurate control and an exhaust mechanism, on one hand, it is ensured that a refrigerant circulates in the system in the optimal state, on the other hand, stable operation of the pump body is ensured, the working efficiency of the pump body is improved, and then the efficient refrigeration effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and in particular to a refrigerant circulation system for an air suspension compressor and a control method and device thereof. Background Art

[0002] The principle of static pressure air suspension bearing is: liquid refrigerant is transported to the porous static pressure air bearing, discharged from the air bearing and collected in the cavity of the motor, and then returned to the evaporator together with the refrigerant cooling the motor. The pressure difference between the refrigerant entering and leaving the bearing generates buoyancy, which provides stable suspension for the compressor rotor. The liquid refrigerant entering the bearing also acts as liquid level lubrication, and the partial vaporization temperature is reduced to cool the bearing. The suspension pressure difference △P = P1 (liquid supply tank pressure) - P2 (machine cavity pressure), which can range from 450kPa to 650kPa. If the high-pressure refrigerant gas is supplied to the bearing, the gas will condense due to the different temperatures of the components in the compressor, and the gas will lose pressure, so liquid supply is a reliable solution for static pressure air suspension bearings.

[0003] How to stably provide refrigerant liquid and keep the pressure difference within the normal range? At present, some solutions are to pump the refrigerant into the liquid supply tank through a gear pump. There is an electric heater in the liquid supply tank to increase the refrigerant pressure for liquid supply. The liquid level of the liquid supply tank is maintained by pumping liquid with a gear pump. When the liquid level of the liquid supply tank is lower than the lower limit, turn on the gear pump to add refrigerant to the liquid supply tank. When the refrigerant in the liquid supply tank reaches the upper limit, turn off the gear pump.

[0004] This solution has a technical problem: if the insulation in front of the gear pump is not in place, the filter resistance is large, or the refrigerant temperature is much lower than the outside temperature, there may be gaseous refrigerant in front of the gear pump. The gaseous refrigerant seriously affects the gear pumping efficiency, causing the gear pump to not work properly or dry grinding, etc., thereby causing damage to the gear pump and the system to not work properly. Summary of the invention

[0005] The present invention provides a refrigerant circulation system for an air suspension compressor and a control method and device thereof, so as to solve the defects in the prior art and achieve the following technical effects: through precise control and exhaust mechanism, on the one hand, it is ensured that the refrigerant circulates in the system in an optimal state; on the other hand, it is ensured that the pump body operates stably and improves its working efficiency, thereby achieving an efficient refrigeration effect.

[0006] A refrigerant circulation system for an air suspension compressor according to a first embodiment of the present invention comprises:

[0007] A main refrigerant circuit is provided with an air suspension compressor, a condenser, an evaporator and an electronic expansion valve connected in sequence, wherein the air suspension compressor is provided with a first inlet on an air bearing and a first outlet on a body thereof, and the first inlet and the first outlet are both connected to a cavity in the body;

[0008] a liquid supply pipeline and a liquid discharge pipeline, wherein the outlet of the condenser is connected to the first inlet through the liquid supply pipeline, and the first outlet is connected to the evaporator through the liquid discharge pipeline;

[0009] A pump body is arranged on the liquid supply pipeline, and an exhaust pipeline connected to the evaporator is also arranged on the liquid supply pipeline, and an exhaust valve is arranged on the exhaust pipeline.

[0010] According to one embodiment of the present invention, a liquid supply tank is provided on the liquid supply pipeline;

[0011] The liquid supply tank is provided with a second liquid inlet, a second liquid outlet and an exhaust port, the second liquid inlet is communicated with the pump body, the second liquid outlet is communicated with the first inlet, and the exhaust port is communicated with the evaporator.

[0012] According to one embodiment of the present invention, a solenoid valve and a one-way valve are further provided on the liquid supply pipeline, and the two ends of the one-way valve are respectively connected to the second liquid inlet and the outlet of the solenoid valve, and the two ends of the solenoid valve are respectively connected to the inlet of the one-way valve and the outlet of the pump body;

[0013] Wherein, the inlet of the exhaust pipeline is located between the solenoid valve and the pump body.

[0014] According to one embodiment of the present invention, a liquid level sensor is provided in the liquid supply tank;

[0015] The refrigerant circulation system also includes a controller, which is respectively connected to the pump body, the exhaust valve, the solenoid valve and the liquid level sensor. The controller is used to receive liquid level information from the liquid level sensor and control the switching of the pump body and the solenoid valve and the opening of the exhaust valve according to the liquid level information.

[0016] According to a second aspect of the present invention, a control method for a refrigerant circulation system for an air suspension compressor based on the first aspect of the present invention comprises:

[0017] Acquiring liquid supply refrigerant information in the liquid supply pipeline;

[0018] According to the liquid supply refrigerant information, the switch of the pump body and / or the opening of the exhaust valve are controlled and adjusted.

[0019] According to one embodiment of the present invention, the liquid supply refrigerant information includes information of the gaseous refrigerant in the liquid supply pipeline;

[0020] The step of controlling and adjusting the switch of the pump body and / or the opening of the exhaust valve according to the liquid supply refrigerant information specifically includes:

[0021] When the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition, the exhaust valve is controlled to open;

[0022] When the gaseous refrigerant in the liquid supply pipeline does not meet the exhaust condition, the exhaust valve is controlled to be closed, and the switch of the pump body is controlled according to the actual liquid level of the liquid supply tank.

[0023] According to an embodiment of the present invention, the step of obtaining the liquid supply refrigerant information in the liquid supply pipeline specifically includes:

[0024] Determining that the pump body is currently in a closed state, then obtaining the actual liquid level of the liquid supply tank;

[0025] When the difference between the actual liquid level and the preset minimum liquid level is greater than zero and less than the preset liquid level difference, determining that the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition;

[0026] Alternatively, when the difference between the actual liquid level and the preset minimum liquid level is less than or equal to zero, it is determined that the gas refrigerant in the liquid supply pipeline does not meet the exhaust condition.

[0027] According to an embodiment of the present invention, the step of obtaining the liquid supply refrigerant information in the liquid supply pipeline specifically includes:

[0028] Determining that the pump body is currently in a closed state, then obtaining the continuous closed time of the pump body;

[0029] When the continuous closing time is longer than the first set time, determining that the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition;

[0030] Alternatively, when the continuous closing time is less than the second set time, it is determined that the gaseous refrigerant in the liquid supply pipeline does not meet the exhaust condition;

[0031] The first set duration is greater than or equal to the second set duration.

[0032] According to one embodiment of the present invention, when the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition, after the step of controlling the exhaust valve to open, the step further includes:

[0033] According to the continuous closing time of the pump body, the initial opening degree and / or the continuous opening time of the exhaust valve are controlled and adjusted.

[0034] According to one embodiment of the present invention, the step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve according to the continuous closing duration of the pump body specifically includes:

[0035] When the continuous closing time is within the first time range, the initial opening of the exhaust valve is controlled to be the first opening;

[0036] When the continuous closing time is within the second time range, the initial opening of the exhaust valve is controlled to be the second opening;

[0037] When the continuous closing time is within a third time range, the initial opening of the exhaust valve is controlled to be the maximum opening;

[0038] The first time range is smaller than the second time range, the second time range is smaller than the third time range, the first opening is smaller than the second opening, and the second opening is smaller than the maximum opening.

[0039] According to one embodiment of the present invention, in the step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve according to the continuous closing duration of the pump body, the continuous opening duration is obtained as follows:

[0040] Establishing a calculation relationship between the continuous closing time and the continuous opening time;

[0041] Substituting the current continuous closing time of the pump body into the calculation relationship to obtain the continuous opening time required for the pump body;

[0042] The continuous on time is positively correlated with the continuous off time.

[0043] According to a third aspect of the present invention, a control device for a refrigerant circulation system of an air suspension compressor based on the first aspect of the present invention comprises:

[0044] An acquisition module, used to acquire the liquid supply refrigerant information in the liquid supply pipeline;

[0045] The control module is used to control and adjust the switch of the pump body and / or the opening of the exhaust valve according to the liquid supply refrigerant information.

[0046] In summary, the design of the refrigerant circulation system for the air suspension compressor according to the present invention is intended to improve the efficiency and reliability of the air suspension compressor. Through precise control and exhaust mechanism, on the one hand, it ensures that the refrigerant circulates in the system in the best state, and on the other hand, it ensures the stable operation of the pump body and improves its working efficiency, thereby achieving an efficient refrigeration effect.

[0047] It should be emphasized that the refrigerant circulation system of the present invention can play the following beneficial roles by adding the design of exhaust pipes and exhaust valves: (1) Preventing cavitation and dry grinding: The design of the exhaust valve and exhaust pipe can effectively remove the gaseous refrigerant in the liquid supply pipe and prevent the gaseous refrigerant from entering the pump body and bearings, thereby avoiding the occurrence of cavitation and dry grinding, thereby protecting the pump body and bearings and extending the life of the equipment. (2) Improving the efficiency of the pump body: By timely removing the gaseous refrigerant, it is ensured that the pump body inhales liquid refrigerant, which can improve the working efficiency of the pump body and avoid the decrease in pump body efficiency caused by the gaseous refrigerant. (3) System stability: The control logic of the exhaust valve can be automatically adjusted according to the actual operating status of the system (such as the liquid level of the liquid supply tank, the operating status of the pump body, etc.) to ensure that the system can operate stably under various working conditions. (4) Simplifying maintenance: Since the potential damage of the gaseous refrigerant to the pump body and bearings is reduced, the maintenance work of the system becomes simpler, reducing maintenance costs and time. (5) Improve system reliability: The existence of the exhaust valve and exhaust pipeline improves the reliability of the entire refrigerant circulation system and reduces system failures and downtime caused by the accumulation of gaseous refrigerant. (6) Enhanced adaptability: Under different ambient temperatures and working pressures, the exhaust valve and exhaust pipeline can adaptively discharge excess gas to ensure that the system can operate efficiently under various conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 is a schematic diagram of a refrigerant circulation system for an air suspension compressor provided by an embodiment of the present invention;

[0050] Figure 2 is a schematic diagram of a refrigerant circulation system for an air suspension compressor provided by another embodiment of the present invention;

[0051] Figure 3 is a schematic diagram of a refrigerant circulation system for an air suspension compressor provided by another embodiment of the present invention;

[0052] Figure 4 It is a schematic diagram of the steps of a control method for a refrigerant circulation system of an air suspension compressor provided by the present invention;

[0053] Figure 5 It is a structural schematic diagram of a control device for a refrigerant circulation system of an air suspension compressor provided by the present invention;

[0054] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention.

[0055] Reference numerals:

[0056] 1. Main refrigerant circuit; 2. Air suspension compressor; 21. First inlet; 22. First outlet; 3. Condenser; 4. Evaporator; 5. Electronic expansion valve;

[0057] 6. Liquid supply pipeline; 61. Pump body; 62. Liquid supply tank; 63. Solenoid valve; 64. Check valve; 7. Liquid discharge pipeline; 81. Exhaust pipeline; 82. Exhaust valve; 83. Liquid replenishment pipeline; 84. Liquid replenishment valve; 85. Bypass pipeline; 86. Bypass expansion valve; 87. Machine body cooling pipeline; 88. Cooling expansion valve; 91. Economizer; 92. Flash cylinder; 110. Acquisition module; 120. Control module. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the embodiments of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without contradiction.

[0060] The following describes a refrigerant circulation system for an air suspension compressor 2 and its control method and control device provided by the present invention with reference to the accompanying drawings. It should be pointed out that the control method and control device proposed in the present invention are both implemented based on the refrigerant circulation system for an air suspension compressor 2 of the present invention as a structural basis.

[0061] Before introducing the refrigerant circulation system for the air suspension compressor 2 according to the first embodiment of the present invention, the air suspension compressor 2 is first explained: the air suspension compressor 2 is a high-efficiency refrigeration device that uses air suspension technology to support and drive the rotor of the air suspension compressor 2. Compared with the traditional air suspension compressor 2, the air suspension compressor 2 has higher energy efficiency and lower operating noise.

[0062] Here is how the Air Suspension Compressor 2 works: The heart of the Air Suspension Compressor 2 is the air suspension bearing, which uses high-pressure gas (usually a refrigerant) to support the rotor and suspend it in the bearing, thereby eliminating the physical contact in traditional bearings. When the Air Suspension Compressor 2 is started, the high-pressure gas enters the bearing through the micropores of the bearing, forming a layer of air film, which supports the rotor and keeps it suspended in the air. Since there is no direct contact between the rotor and the bearing, friction and wear are greatly reduced, which not only improves the operating efficiency of the Air Suspension Compressor 2, but also extends the service life of the equipment.

[0063] like Figures 1 to 3 As shown, the refrigerant circulation system for the air suspension compressor 2 according to the embodiment of the present invention includes a main refrigerant circuit 1, a liquid supply pipeline 6, a liquid discharge pipeline 7, a pump body 61, an exhaust pipeline 81 and an exhaust valve 82.

[0064] The main refrigerant circuit 1 is provided with an air suspension compressor 2, a condenser 3, an evaporator 4 and an electronic expansion valve 5 connected in sequence. The air suspension bearing of the air suspension compressor 2 is provided with a first inlet 21, and the body of the air suspension compressor 2 is provided with a first outlet 22. The first inlet 21 and the first outlet 22 are both connected to the cavity in the body. It can be understood that the first inlet 21 is used to provide refrigerant liquid to the bearing to maintain the suspension and lubrication of the rotor of the air suspension compressor 2. The first outlet 22 is used to discharge the refrigerant liquid, which then enters the evaporator 4.

[0065] The outlet of the condenser 3 is connected to the first inlet 21 through the liquid supply line 6 , and the first outlet 22 is connected to the inlet of the evaporator 4 through the liquid discharge line 7 .

[0066] A pump body 61 is provided on the liquid supply pipeline 6, and the pump body 61 is used to push the refrigerant liquid from the condenser 3 to the liquid inlet of the air suspension compressor 2. An exhaust pipeline 81 connected to the inlet of the evaporator 4 is also provided on the liquid supply pipeline 6, and an exhaust valve 82 is provided on the exhaust pipeline 81. Among them, the exhaust pipeline is used to discharge the gas that may exist in the system, and the exhaust valve 82 is used to control the exhaust of the gas, ensuring that the refrigerant in the system circulates in a liquid state to prevent the gaseous refrigerant from affecting the system efficiency.

[0067] The specific working principle and working process of the refrigerant circulation system for the air suspension compressor 2 according to the embodiment of the present invention are as follows:

[0068] When the system is started, the refrigerant (coolant) absorbs heat in the evaporator 4 and evaporates into a gaseous state. The gaseous refrigerant is then sucked into the air suspension compressor 2. In the air suspension compressor 2, the gaseous refrigerant is compressed, the pressure and temperature rise, and then it is transported to the condenser 3. In the condenser 3, the high-temperature and high-pressure gaseous refrigerant releases heat to the surrounding environment, thereby condensing into a liquid state.

[0069] The liquid refrigerant flowing out of the condenser 3 is divided into two parts, one of which flows into the evaporator 4 through the main refrigerant circuit 1 and returns to the air intake of the air suspension compressor 2, while the other part of the liquid refrigerant flows to the first inlet 21 of the air suspension compressor 2 through the liquid supply pipeline 6. At this time, this part of the liquid refrigerant directly enters the air floating bearing of the air suspension compressor 2 to provide suspension and lubrication for the rotor of the air suspension compressor 2. At the same time, the refrigerant is partially vaporized in the bearing, which helps to reduce the temperature of the bearing and ensure its normal operation. Afterwards, part of the refrigerant passing through the air floating bearing is discharged through the first outlet 22, enters the drain pipeline 7, and finally returns to the evaporator 4. In the evaporator 4, the refrigerant absorbs heat and evaporates again to complete the cycle.

[0070] It is understandable that during the entire cycle, if there is gaseous refrigerant in the liquid supply line 6, this may affect the working efficiency of the pump body 61 and even cause damage. Therefore, in order to solve this problem, an exhaust line 81 and an exhaust valve 82 are provided on the liquid supply line 6. When the system detects that there is gaseous refrigerant in the liquid supply line 6, the exhaust valve 82 will open, allowing the gaseous refrigerant to be discharged to the evaporator 4 through the exhaust line 81, thereby ensuring that the pump body 61 can efficiently transport liquid refrigerant.

[0071] Furthermore, during actual operation, the system can monitor the pressure, temperature and liquid level of the liquid supply pipeline 6 and the operating status of the air suspension compressor 2 through sensors. The control system adjusts the operation of the pump body 61 and the opening and closing of the exhaust valve 82 according to these data to ensure the stability and efficiency of the refrigerant circulation.

[0072] When the system needs to shut down, the control system will gradually reduce the operating speed of the air suspension compressor 2 and close the exhaust valve 82 to ensure the safe shutdown of the refrigerant circulation system. During maintenance, the system can use the exhaust pipe 81 and the exhaust valve 82 to exhaust the gas in the system for inspection and maintenance.

[0073] In summary, the design of the refrigerant circulation system for the air suspension compressor 2 according to the present invention is intended to improve the efficiency and reliability of the air suspension compressor 2. Through precise control and exhaust mechanisms, on the one hand, it ensures that the refrigerant circulates in the system in an optimal state, and on the other hand, it ensures the stable operation of the pump body 61 and improves its working efficiency, thereby achieving an efficient refrigeration effect.

[0074] It should be emphasized that the refrigerant circulation system of the present invention, by adding the design of the exhaust pipe 81 and the exhaust valve 82, can play the following beneficial roles: (1) Preventing cavitation and dry grinding: The design of the exhaust valve 82 and the exhaust pipe 81 can effectively remove the gaseous refrigerant in the liquid supply pipe 6, prevent the gaseous refrigerant from entering the pump body 61 and the bearings, thereby avoiding the occurrence of cavitation and dry grinding, and further protecting the pump body 61 and the bearings and extending the life of the equipment. (2) Improving the efficiency of the pump body 61: By timely removing the gaseous refrigerant, it is ensured that the pump body 61 inhales the liquid refrigerant, which can improve the working efficiency of the pump body 61 and avoid the decrease in the efficiency of the pump body 61 caused by the gaseous refrigerant. (3) System stability: The control logic of the exhaust valve 82 can be automatically adjusted according to the actual operating status of the system (such as the liquid level of the liquid supply tank 62, the operating status of the pump body 61, etc.), to ensure that the system can operate stably under various working conditions. (4) Simplifying maintenance: Since the potential damage of the gaseous refrigerant to the pump body 61 and the bearings is reduced, the maintenance work of the system becomes simpler, reducing the maintenance cost and time. (5) Improved system reliability: The existence of the exhaust valve 82 and the exhaust pipeline 81 improves the reliability of the entire refrigerant circulation system and reduces system failures and downtime caused by the accumulation of gaseous refrigerant. (6) Enhanced adaptability: Under different ambient temperatures and working pressures, the exhaust valve 82 and the exhaust pipeline 81 can adaptively discharge excess gas to ensure that the system can operate efficiently under various conditions.

[0075] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a liquid supply tank 62 is provided on the liquid supply pipeline 6. The liquid supply tank 62 is provided with a second liquid inlet, a second liquid outlet and an exhaust port, the second liquid inlet is communicated with the pump body 61, the second liquid outlet is communicated with the first inlet 21, and the exhaust port is communicated with the evaporator 4.

[0076] In this embodiment, the liquid supply tank 62 is a closed container for storing liquid refrigerant. It is usually located between the condenser 3 and the air suspension compressor 2, and is used to stabilize the supply of refrigerant. Among them, the second liquid inlet is the inlet of the liquid supply tank 62 to receive the liquid refrigerant from the condenser 3; the second liquid outlet allows the refrigerant in the liquid supply tank 62 to flow to the air suspension compressor 2, providing the required liquid refrigerant for the air floating bearing of the air suspension compressor 2 to achieve the suspension and lubrication of the rotor; the exhaust port is connected to the evaporator 4, and is used to discharge the gaseous refrigerant that may exist in the liquid supply tank 62, so as to maintain the pressure balance inside the liquid supply tank 62 and ensure that the refrigerant is supplied to the air suspension compressor 2 in liquid form.

[0077] After the liquid refrigerant is condensed in the condenser 3, it enters the liquid supply tank 62 through the second liquid inlet and is transported by the pump body 61. The liquid supply tank 62 stores enough liquid refrigerant to ensure a stable supply during the operation of the air suspension compressor 2. When the air suspension compressor 2 needs refrigerant, the liquid refrigerant flows to the first inlet 21 of the air suspension compressor 2 through the second liquid outlet and enters the air bearing. If there is excess gaseous refrigerant inside the liquid supply tank 62, it will be discharged to the evaporator 4 through the exhaust port to maintain the pressure inside the liquid supply tank 62 stable.

[0078] In this way, the presence of the liquid supply tank 62 reduces the fluctuation of the refrigerant supply, ensuring that the air suspension compressor 2 can obtain a stable refrigerant supply under different loads. In addition, the liquid supply tank 62 can adjust the flow rate of the refrigerant and supply liquid according to the actual needs of the air suspension compressor 2, thereby improving the efficiency of the refrigerant circulation. In addition, the centralized liquid supply function of the liquid supply tank 62 simplifies the pipeline design of the system, reduces the connection points, and reduces the risk of leakage.

[0079] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a solenoid valve 63 and a one-way valve 64 are further provided on the liquid supply pipeline 6, and both ends of the one-way valve 64 are respectively connected to the second liquid inlet and the outlet of the solenoid valve 63, and both ends of the solenoid valve 63 are respectively connected to the inlet of the one-way valve 64 and the outlet of the pump body 61. Among them, the inlet of the exhaust pipeline 81 is located between the solenoid valve 63 and the pump body 61.

[0080] In this embodiment, when the solenoid valve 63 is opened, the refrigerant is allowed to flow from the pump body 61 to the liquid supply tank 62; when the solenoid valve 63 is closed, the flow of the refrigerant is cut off, thereby controlling the filling speed and pressure of the liquid supply tank 62. In this system, the one-way valve 64 ensures that the refrigerant can only enter the liquid supply tank 62 from the second liquid inlet, and will not flow back from the liquid supply tank 62 to the pump body 61. This design can prevent the refrigerant from flowing back when the solenoid valve 63 is closed. The exhaust pipeline 81 can maintain the purity of the refrigerant in the liquid supply pipeline 6, ensuring that the air suspension compressor 2 receives liquid refrigerant.

[0081] Specifically, when the system is started or the refrigerant needs to be replenished, the solenoid valve 63 opens, and the refrigerant flows from the pump body 61 to the liquid supply tank 62 through the solenoid valve 63. The one-way valve 64 ensures that the refrigerant can only flow in one direction. During the filling process, if there is gaseous refrigerant in the liquid supply pipeline 6, the inlet of the exhaust pipeline 81 will capture the gas and guide it to the evaporator 4, thereby preventing the gaseous refrigerant from entering the air suspension compressor 2. Among them, the opening and closing of the solenoid valve 63 is adjusted by the control system according to the liquid level and pressure of the liquid supply tank 62 and the needs of the air suspension compressor 2 to achieve accurate refrigerant supply.

[0082] In this way, the solenoid valve 63 provides accurate control of the refrigerant flow rate and can adjust the liquid supply amount according to the actual needs of the system. The design of the one-way valve 64 prevents unnecessary backflow of the refrigerant in the system, ensuring the cleanliness and efficiency of the liquid supply pipeline 6.

[0083] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a filter is further provided on the liquid supply pipeline 6, and the filter is located between the condenser 3 and the pump body 61. In this way, the filter can play a role in filtering the refrigerant.

[0084] According to some embodiments of the present invention, the outlet of the evaporator 4 is connected to the liquid supply pipeline 6 through a liquid replenishment pipeline 83, a liquid replenishment valve 84 is provided on the liquid replenishment pipeline 83, and the inlet of the liquid replenishment pipeline 83 is located between the filter and the condenser 3. The function of the liquid replenishment pipeline 83 is as follows: when the amount of liquid refrigerant in the condenser 3 is small and cannot meet the liquid supply demand for the air suspension compressor 2, the liquid replenishment valve 84 is opened, and the pump body 61 can extract liquid refrigerant from the evaporator 4 to supply it to the liquid supply tank 62, thereby achieving sufficient liquid supply to the air suspension compressor 2.

[0085] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a bypass line 85 is further provided between the condenser 3 and the evaporator 4, and a bypass expansion valve 86 is provided on the bypass line 85, wherein the bypass line 85 and the bypass expansion valve 86 are used for starting and stopping, high pressure ratio control and low load unloading bypass.

[0086] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a body cooling pipeline 87 is further provided between the condenser 3 and the body cavity of the air suspension compressor 2, that is, the outlet of the condenser 3 is connected to the body cavity of the air suspension compressor 2 through the body cooling pipeline 87, and a cooling expansion valve 88 is provided on the body cooling pipeline 87.

[0087] It can be understood that when the body temperature of the air suspension compressor 2 is too high, the liquid refrigerant can flow out from the condenser 3 and pass through the cooling expansion valve 88 into the body cavity of the air suspension compressor 2 for cooling. At this time, the system can adjust the opening of the cooling expansion valve 88 through PID to ensure that the motor temperature of the air suspension compressor 2 is within a reasonable range.

[0088] like Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, in the main refrigerant circuit 1, an economizer 91 or a flash cylinder 92 may be provided on the main refrigerant pipeline between the condenser 3 and the evaporator 4.

[0089] It is understandable that Figure 2As shown, the economizer 91 is a heat exchanger that uses part of the heat of the high-pressure liquid refrigerant to preheat the refrigerant on the low-pressure side, thereby improving the energy efficiency of the system. On the main refrigerant pipeline, the economizer 91 is located downstream of the condenser 3. It can receive the high-pressure liquid refrigerant from the condenser 3 and transfer part of its heat to the low-pressure liquid refrigerant returned from the evaporator 4. This heat exchange reduces the load on the air suspension compressor 2 because the refrigerant on the low-pressure side has been preheated before entering the air suspension compressor 2, thereby reducing the compression workload of the air suspension compressor 2.

[0090] like Figure 3 As shown, the flash cylinder 92 is a device that uses pressure reduction to cause partial evaporation of the refrigerant. When the high-pressure liquid refrigerant enters the flash cylinder 92, the refrigerant will quickly flash into a gaseous state due to the pressure reduction, releasing heat. The released heat can be used to preheat the refrigerant entering the evaporator 4, or used in other heat exchange processes, such as preheating the refrigerant entering the economizer 91.

[0091] like Figures 1 to 3 As shown, according to some embodiments of the present invention, a liquid level sensor is provided in the liquid supply tank 62. The refrigerant circulation system further includes a controller, which is respectively connected to the pump body 61, the exhaust valve 82, the solenoid valve 63 and the liquid level sensor, and is used to receive the liquid level information of the liquid level sensor, and control the switch of the pump body 61 and the solenoid valve 63 and the opening of the exhaust valve 82 according to the liquid level information.

[0092] In this embodiment, the controller is the brain of the refrigerant circulation system, which is connected to the pump body 61, the exhaust valve 82, the solenoid valve 63 and the liquid level sensor. It can make decisions based on real-time data and automatically adjust the working status of these components.

[0093] When the liquid level sensor detects that the liquid level in the liquid supply tank 62 is lower than the preset minimum safety value, the controller will instruct the solenoid valve 63 to open, allowing the pump body 61 to extract refrigerant from the condenser 3 and replenish it into the liquid supply tank 62. When the liquid level reaches the preset maximum value, the controller will close the solenoid valve 63, stop replenishing the refrigerant, and prevent the liquid supply tank 62 from overflowing.

[0094] The controller can also adjust the opening of the exhaust valve 82 according to the liquid level information. If it is detected that there is too much gaseous refrigerant in the liquid supply tank 62 and the liquid supply pipeline 6, the controller may open the exhaust valve 82 to release gas to reduce the gaseous refrigerant in the liquid supply pipeline 6 and the liquid supply tank 62.

[0095] The control method and control device of the refrigerant circulation system proposed by the present invention are described below with reference to the accompanying drawings. Among them, before the embodiment of the present invention is described in detail, the entire application scenario is first described. The control method, control device, electronic device and computer-readable storage medium of the refrigerant circulation system of the embodiment of the present invention can be applied to the refrigerant circulation system locally, and can also be applied to the cloud platform in the Internet field, or other types of cloud platforms in the Internet field, or can also be applied to third-party devices. Among them, the third-party device may include many different types such as mobile phones, tablet computers, notebooks, car computers and other smart terminals.

[0096] The following description only takes the control method applicable to the refrigerant circulation system as an example. It should be understood that the control method of the embodiment of the present invention can also be applied to the cloud platform and third-party equipment.

[0097] like Figure 4 As shown, according to the second aspect of the present invention, a control method for a refrigerant circulation system of an air suspension compressor 2 includes:

[0098] Step S1, obtaining the liquid supply refrigerant information in the liquid supply pipeline 6;

[0099] Step S2, controlling the switch of the pump body 61 and / or the opening of the exhaust valve 82 according to the liquid supply refrigerant information.

[0100] Furthermore, the liquid supply refrigerant information includes information of the gaseous refrigerant in the liquid supply pipeline 6. Then, according to the liquid supply refrigerant information, the step of controlling the switch of the pump body 61 and / or the opening of the exhaust valve 82 specifically includes:

[0101] When the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition, the exhaust valve 82 is controlled to open;

[0102] When the gaseous refrigerant in the liquid supply pipeline 6 does not meet the exhaust condition, the exhaust valve 82 is controlled to be closed, and the switch of the pump body 61 is controlled according to the actual liquid level of the liquid supply tank 62 .

[0103] As described above, the second embodiment of the present invention provides a control method for a refrigerant circulation system of an air suspension compressor 2, which obtains the liquid supply refrigerant information in the liquid supply pipeline 6 and adjusts the working state of the pump body 61 and the exhaust valve 82 according to the information to ensure efficient and stable operation of the system. The following are the specific steps and logic of the control method:

[0104] First, in step S1, the system obtains the liquid supply refrigerant information. Specifically, the system obtains the refrigerant status in the liquid supply pipeline 6 through sensors or other detection equipment, including the presence and amount of gaseous refrigerant. This information is crucial for subsequent control decisions.

[0105] Secondly, in step S2, the system needs to be controlled and adjusted according to the liquid supply refrigerant information. Specifically, step S2 involves two sub-steps, and the switch states of the pump body 61 and the exhaust valve 82 are determined according to whether the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition.

[0106] Among them, sub-step S2.1 is the situation where the exhaust condition is met. Specifically, if it is detected that the amount of gaseous refrigerant in the liquid supply pipeline 6 reaches the set exhaust condition (for example, the proportion of gaseous refrigerant exceeds the preset threshold), the controller will instruct the exhaust valve 82 to open. At this time, due to the pressure difference between the evaporator 4 and the condenser 3, the gaseous refrigerant in the liquid supply pipeline 6 will automatically enter the evaporator 4 under the action of the pressure difference to achieve the discharge of the gaseous refrigerant. In this way, the gaseous refrigerant can be discharged from the system to avoid its adverse effect on the operation of the air suspension compressor 2 and the pump body 61.

[0107] Sub-step S2.2 is the right to not meet the exhaust condition. Specifically, if the amount of gaseous refrigerant in the liquid supply pipeline 6 does not meet the exhaust condition, the controller will close the exhaust valve 82 to prevent unnecessary refrigerant loss. At the same time, the controller will control the switch of the pump body 61 according to the actual liquid level of the liquid supply tank 62. If the liquid level of the liquid supply tank 62 is too low, the controller will turn on the pump body 61 to replenish the refrigerant; if the liquid level is too high, the pump body 61 may be kept closed or its working state may be adjusted to maintain the liquid level in the liquid supply tank 62 within a safe range.

[0108] In summary, through the above control method, the system can intelligently manage the refrigerant state in the liquid supply pipeline 6, ensure that the air suspension compressor 2 and the pump body 61 operate in the best state, and improve the energy efficiency and reliability of the entire refrigerant circulation system. This method reduces human intervention, improves the level of automation, and reduces operational complexity.

[0109] According to some embodiments of the present invention, it can be understood that the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition, which means that there is too much gaseous refrigerant in the liquid supply pipeline 6 and exhaust is required, and does not meet the exhaust condition, which means that there is too little or even no gaseous refrigerant in the liquid supply pipeline 6 and exhaust is not required. In order to determine whether the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition, the system can obtain different types of parameters to achieve the judgment of the exhaust condition.

[0110] For example, obtaining the liquid level information in the liquid supply tank 62: monitoring the refrigerant liquid level in the liquid supply tank 62 through a liquid level sensor. If the liquid level is too low, it may indicate that there is too much gaseous refrigerant in the liquid supply pipeline 6 because the liquid refrigerant is over-consumed. In this case, the system may need to be vented to ensure that there is enough liquid refrigerant to supply the air suspension compressor 2.

[0111] For another example, the duration of continuous shutdown of the pump body 61 is obtained: if the pump body 61 is closed for a long time, the pressure in the liquid supply pipeline 6 may drop, causing the gaseous refrigerant to accumulate in the pipeline. By monitoring the shutdown duration of the pump body 61, the system can determine whether exhaust is needed to restore normal refrigerant flow.

[0112] For another example, monitoring the pressure of the liquid supply line 6: the pressure sensor is used to monitor the pressure of the liquid supply line 6. If the pressure is lower than the normal range, this may indicate that the gaseous refrigerant occupies space in the line and needs to be exhausted to restore the pressure.

[0113] For another example, the operating state of the air suspension compressor 2 is monitored: if the operating efficiency of the air suspension compressor 2 decreases or an abnormality occurs, this may be caused by excessive gaseous refrigerant in the liquid supply pipeline 6. The system can determine whether exhaust is required by monitoring the performance parameters of the air suspension compressor 2.

[0114] In addition, in some cases, the temperature change in the liquid supply line 6 may also indicate the presence of gaseous refrigerant. For example, if the temperature in the line is lower than expected, this may be due to the presence of gaseous refrigerant causing heat loss.

[0115] In summary, through the above monitoring means, the system can comprehensively judge whether the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition. If it is judged that the exhaust condition is met, the system will perform the exhaust operation; if not, the system will adjust the switch of the pump body 61 and the opening of the exhaust valve 82 to maintain the appropriate state of the refrigerant in the liquid supply pipeline 6. This intelligent control method improves the automation level of the system and ensures the efficient and stable operation of the air suspension compressor 2 and the pump body 61.

[0116] In some specific embodiments of the present invention, taking obtaining the liquid level information in the liquid supply tank 62 as an example for detailed description, the step of obtaining the liquid supply refrigerant information in the liquid supply pipeline 6 specifically includes:

[0117] Determine that the pump body 61 is currently in a closed state, and then obtain the actual liquid level of the liquid supply tank 62;

[0118] When the difference between the actual liquid level and the preset minimum liquid level is greater than zero and less than the preset liquid level difference, it is determined that the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition;

[0119] Alternatively, when the difference between the actual liquid level and the preset minimum liquid level is less than or equal to zero, it is determined that the gas refrigerant in the liquid supply pipeline 6 does not meet the exhaust condition.

[0120] In this embodiment, first, the system checks the current state of the pump body 61. If the pump body 61 is in the closed state, it means that no new refrigerant flows into the liquid supply pipeline 6, so it is a suitable time to obtain the refrigerant information in the liquid supply pipeline 6.

[0121] When the pump body 61 is closed, the system obtains the actual liquid level height of the liquid supply tank 62 through the liquid level sensor. The liquid level data is key information for determining the state of the gaseous refrigerant in the liquid supply pipeline 6. Subsequently, the system compares the actual liquid level with the preset minimum liquid level threshold, wherein the preset minimum liquid level threshold is a safety value for ensuring that there is enough refrigerant in the liquid supply tank 62 to supply the air suspension compressor 2.

[0122] If the actual liquid level is higher than the preset minimum liquid level, but the difference between the two is less than the preset liquid level difference, this indicates that there may be too much gaseous refrigerant in the liquid supply pipeline 6. In this case, the system will determine that the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition and needs to perform an exhaust operation to restore normal liquid refrigerant supply.

[0123] If the difference between the actual liquid level and the preset minimum liquid level is less than or equal to zero, it means that the refrigerant in the liquid supply tank 62 may have approached or reached the minimum safety level. In this case, the system will determine that the gaseous refrigerant in the liquid supply pipeline 6 does not meet the exhaust condition, because exhausting may cause insufficient refrigerant in the liquid supply tank 62, thereby affecting the normal operation of the air suspension compressor 2.

[0124] In some other specific embodiments of the present invention, taking the continuous shutdown time of the pump body 61 as an example for detailed description, the step of obtaining the liquid supply refrigerant information in the liquid supply pipeline 6 specifically includes:

[0125] Determine that the pump body 61 is currently in a closed state, and then obtain the continuous closing time of the pump body 61;

[0126] When the continuous closing time is longer than the first set time, it is determined that the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition;

[0127] Alternatively, when the continuous closing time is less than the second set time, it is determined that the gaseous refrigerant in the liquid supply pipeline 6 does not meet the exhaust condition. The first set time is greater than or equal to the second set time.

[0128] In this embodiment, if the pump body 61 is in the closed state, the system will record the time elapsed since the pump body 61 was closed, that is, the continuous closing time of the pump body 61. Subsequently, the system compares the recorded continuous closing time with two preset time thresholds: a first set time and a second set time. These two time thresholds are set based on system design and operating experience, and are used to determine the accumulation of gaseous refrigerant in the liquid supply pipeline 6.

[0129] If the pump body 61 is continuously closed for a period longer than the first set period, the system will determine that the gaseous refrigerant in the liquid supply pipeline 6 has accumulated enough to meet the exhaust condition. This is because a long period of closure may cause the pressure in the pipeline to drop, causing the gaseous refrigerant to accumulate in the pipeline.

[0130] If the continuous closing time of the pump body 61 is less than the second set time, the system will determine that the gaseous refrigerant in the liquid supply pipeline 6 is insufficient and does not meet the exhaust condition. This may be because the closing time is short and the gaseous refrigerant has not had enough time to accumulate in the pipeline.

[0131] Finally, according to the judgment result, the system will perform corresponding operations. If the exhaust condition is met, the system may open the exhaust valve 82 to remove the gaseous refrigerant in the pipeline. If the exhaust condition is not met, the system may keep the exhaust valve 82 closed and adjust the start timing or other relevant parameters of the pump body 61 as needed.

[0132] In this way, the system can intelligently judge the state of the gaseous refrigerant in the liquid supply pipeline 6 according to the shutdown time of the pump body 61, and adjust the exhaust operation accordingly to ensure the stable and efficient operation of the refrigerant circulation system. This control strategy helps to avoid unnecessary exhaust operations, while ensuring that the gaseous refrigerant can be removed in time when necessary to prevent the system efficiency from decreasing.

[0133] Furthermore, when the gaseous refrigerant in the liquid supply pipeline 6 meets the exhaust condition, after the step of controlling the exhaust valve 82 to open, the method further includes:

[0134] According to the duration of the continuous closing of the pump body 61 , the initial opening degree and / or the continuous opening duration of the exhaust valve 82 are controlled and adjusted.

[0135] In this embodiment, the system sets the initial opening of the exhaust valve 82 according to the closing time of the pump body 61. If the closing time is long, the system may set a larger initial opening to discharge the accumulated gaseous refrigerant more quickly. On the contrary, if the closing time is short, the initial opening may be set smaller to avoid excessive exhaust.

[0136] In addition to the initial opening, the system also controls the continuous opening time of the exhaust valve 82 according to the closing time of the pump body 61. If the closing time is long, the exhaust valve 82 may remain open for a long time to ensure that the gaseous refrigerant is fully discharged. If the closing time is short, the opening time of the exhaust valve 82 may be shortened accordingly.

[0137] In a specific embodiment, the step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve 82 according to the continuous closing duration of the pump body 61 specifically includes:

[0138] When the continuous closing time is within the first time range, the initial opening of the exhaust valve 82 is controlled to be the first opening;

[0139] When the continuous closing time is within the second time range, the initial opening of the exhaust valve 82 is controlled to be the second opening;

[0140] When the continuous closing time is within the third time range, the initial opening of the exhaust valve 82 is controlled to be the maximum opening.

[0141] The first duration range is smaller than the second duration range, the second duration range is smaller than the third duration range, the first opening is smaller than the second opening, and the second opening is smaller than the maximum opening.

[0142] In this embodiment, the system sets three different time ranges (first time range, second time range, third time range) according to the duration of the continuous closing of the pump body 61, and each range corresponds to a specific initial opening (first opening, second opening, maximum opening). The first time range corresponds to the smallest initial opening (first opening), the second time range corresponds to the medium initial opening (second opening), and the third time range corresponds to the largest initial opening (maximum opening).

[0143] It can be understood that the above ranges and openings are set based on empirical data and system design to ensure effective exhaust under different circumstances.

[0144] In another specific embodiment, in the step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve 82 according to the continuous closing duration of the pump body 61, the continuous opening duration is obtained as follows:

[0145] Establish a calculation relationship between the continuous closing time and the continuous opening time;

[0146] The current continuous closing time of the pump body 61 is substituted into the calculation relationship to obtain the continuous opening time required for the pump body 61 .

[0147] Among them, the continuous opening time is positively correlated with the continuous closing time.

[0148] In this embodiment, in order to determine the continuous opening time of the exhaust valve 82, the system establishes a calculation relationship, which relates the continuous closing time of the pump body 61 to the required continuous opening time. The relationship may be linear or nonlinear, depending on the specific needs and design of the system.

[0149] The system substitutes the current continuous closing time into the calculation relationship to obtain the continuous opening time required for the exhaust valve 82. Specifically, the continuous opening time is positively correlated with the continuous closing time, which means that the longer the closing time is, the longer the exhaust valve 82 needs to be opened to ensure that the gaseous refrigerant is fully discharged.

[0150] The control device of the refrigerant circulation system for the air suspension compressor 2 provided by the present invention is described below. The control device of the refrigerant circulation system for the air suspension compressor 2 described below and the control method of the refrigerant circulation system for the air suspension compressor 2 described above can be referred to each other.

[0151] like Figure 5 As shown, a control device for a refrigerant circulation system of an air suspension compressor 2 according to an embodiment of the third aspect of the present invention includes:

[0152] An acquisition module, used to acquire the liquid supply refrigerant information in the liquid supply pipeline 6;

[0153] The control module is used to control the switch of the pump body 61 and / or the opening of the exhaust valve 82 according to the liquid supply refrigerant information.

[0154] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the control method of the refrigerant circulation system, including: obtaining the liquid supply refrigerant information in the liquid supply pipeline 6; and controlling the switch of the pump body 61 and / or the opening of the exhaust valve 82 according to the liquid supply refrigerant information.

[0155] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0156] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the refrigerant circulation system provided by the above methods, including: obtaining the liquid supply refrigerant information in the liquid supply pipeline 6; according to the liquid supply refrigerant information, controlling the switch of the pump body 61 and / or the opening of the exhaust valve 82.

[0157] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method of the refrigerant circulation system provided by the above-mentioned methods is implemented, including: obtaining the liquid supply refrigerant information in the liquid supply pipeline 6; and controlling the switch of the pump body 61 and / or the opening of the exhaust valve 82 according to the liquid supply refrigerant information.

[0158] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0159] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigerant circulation system for an air suspension compressor, characterized in that: include: A main refrigerant circuit is provided with an air suspension compressor, a condenser, an evaporator and an electronic expansion valve connected in sequence, wherein the air suspension compressor is provided with a first inlet on an air bearing and a first outlet on a body thereof, and the first inlet and the first outlet are both connected to a cavity in the body; a liquid supply pipeline and a liquid discharge pipeline, wherein the outlet of the condenser is connected to the first inlet through the liquid supply pipeline, and the first outlet is connected to the evaporator through the liquid discharge pipeline; A pump body is arranged on the liquid supply pipeline, and an exhaust pipeline connected to the evaporator is also arranged on the liquid supply pipeline, and an exhaust valve is arranged on the exhaust pipeline.

2. The refrigerant circulation system for an air suspension compressor according to claim 1, characterized in that: The liquid supply pipeline is provided with a liquid supply tank; The liquid supply tank is provided with a second liquid inlet, a second liquid outlet and an exhaust port, the second liquid inlet is communicated with the pump body, the second liquid outlet is communicated with the first inlet, and the exhaust port is communicated with the evaporator.

3. The refrigerant circulation system for an air suspension compressor according to claim 2, characterized in that: The liquid supply pipeline is also provided with a solenoid valve and a one-way valve, the two ends of the one-way valve are respectively connected with the second liquid inlet and the outlet of the solenoid valve, and the two ends of the solenoid valve are respectively connected with the inlet of the one-way valve and the outlet of the pump body; Wherein, the inlet of the exhaust pipeline is located between the solenoid valve and the pump body.

4. The refrigerant circulation system for an air suspension compressor according to claim 3, characterized in that: A liquid level sensor is provided in the liquid supply tank; The refrigerant circulation system also includes a controller, which is respectively connected to the pump body, the exhaust valve, the solenoid valve and the liquid level sensor. The controller is used to receive liquid level information from the liquid level sensor and control the switching of the pump body and the solenoid valve and the opening of the exhaust valve according to the liquid level information.

5. A control method for a refrigerant circulation system for an air suspension compressor according to any one of claims 1 to 4, characterized in that: include: Acquiring liquid supply refrigerant information in the liquid supply pipeline; According to the liquid supply refrigerant information, the switch of the pump body and / or the opening of the exhaust valve are controlled and adjusted.

6. The control method for a refrigerant circulation system for an air suspension compressor according to claim 5, characterized in that: The liquid supply refrigerant information includes information of the gaseous refrigerant in the liquid supply pipeline; The step of controlling and adjusting the switch of the pump body and / or the opening of the exhaust valve according to the liquid supply refrigerant information specifically includes: When the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition, the exhaust valve is controlled to open; When the gaseous refrigerant in the liquid supply pipeline does not meet the exhaust condition, the exhaust valve is controlled to be closed, and the switch of the pump body is controlled according to the actual liquid level of the liquid supply tank.

7. The control method for a refrigerant circulation system for an air suspension compressor according to claim 6, characterized in that: The step of obtaining the liquid supply refrigerant information in the liquid supply pipeline specifically includes: Determining that the pump body is currently in a closed state, then obtaining the actual liquid level of the liquid supply tank; When the difference between the actual liquid level and the preset minimum liquid level is greater than zero and less than the preset liquid level difference, determining that the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition; Alternatively, when the difference between the actual liquid level and the preset minimum liquid level is less than or equal to zero, it is determined that the gas refrigerant in the liquid supply pipeline does not meet the exhaust condition.

8. The control method for a refrigerant circulation system for an air suspension compressor according to claim 6, characterized in that: The step of obtaining the liquid supply refrigerant information in the liquid supply pipeline specifically includes: Determining that the pump body is currently in a closed state, then obtaining the continuous closed time of the pump body; When the continuous closing time is longer than the first set time, determining that the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition; Alternatively, when the continuous closing time is less than the second set time, it is determined that the gaseous refrigerant in the liquid supply pipeline does not meet the exhaust condition; The first set duration is greater than or equal to the second set duration.

9. The control method for a refrigerant circulation system for an air suspension compressor according to claim 8, characterized in that: When the gaseous refrigerant in the liquid supply pipeline meets the exhaust condition, after the step of controlling the exhaust valve to open, the method further includes: According to the continuous closing time of the pump body, the initial opening degree and / or the continuous opening time of the exhaust valve are controlled and adjusted.

10. The control method for a refrigerant circulation system for an air suspension compressor according to claim 9, characterized in that: The step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve according to the continuous closing duration of the pump body specifically includes: When the continuous closing time is within the first time range, the initial opening of the exhaust valve is controlled to be the first opening; When the continuous closing time is within the second time range, the initial opening of the exhaust valve is controlled to be the second opening; When the continuous closing time is within a third time range, the initial opening of the exhaust valve is controlled to be the maximum opening; The first time range is smaller than the second time range, the second time range is smaller than the third time range, the first opening is smaller than the second opening, and the second opening is smaller than the maximum opening.

11. The control method for a refrigerant circulation system for an air suspension compressor according to claim 9, characterized in that: In the step of controlling and adjusting the initial opening degree and / or the continuous opening duration of the exhaust valve according to the continuous closing duration of the pump body, the continuous opening duration is obtained as follows: Establishing a calculation relationship between the continuous closing time and the continuous opening time; Substituting the current continuous closing time of the pump body into the calculation relationship to obtain the continuous opening time required for the pump body; The continuous on time is positively correlated with the continuous off time.

12. A control device for a refrigerant circulation system of an air suspension compressor according to any one of claims 1 to 4, characterized in that: include: An acquisition module, used to acquire the liquid supply refrigerant information in the liquid supply pipeline; The control module is used to control and adjust the switch of the pump body and / or the opening of the exhaust valve according to the liquid supply refrigerant information.

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