Refrigeration equipment and control method and control device thereof

Abstract

The invention discloses refrigeration equipment and a control method and device thereof. The refrigeration system comprises a water vapor compressor, a condenser, a throttling device and an evaporator; the exhaust system comprises a gas-liquid separator, a gas storage tank, an ejector and a pump; the gas-liquid separator is provided with an inlet, a first liquid outlet and a gas outlet, the gas storage tank is provided with a gas inlet, and the ejector is provided with a jet flow inlet, a gas suction port and a discharge port; the inlet is communicated with the outlet end of the condenser, and the first liquid outlet is communicated with the inlet end of the throttling device; the air suction port can be communicated with the air outlet, and the exhaust port can be communicated with the air inlet; the pump communicates with the jet flow inlet and is arranged to pump fluid into the ejector so that negative pressure can be generated at the air suction port, and then air in the air-liquid separator can be sucked through the negative pressure and exhausted into the air storage tank. According to the scheme, gas in the gas-liquid separator can be sucked into the gas storage tank through the ejector, engine oil emulsification of the vacuum pump due to the fact that refrigerant water is pumped out is avoided, and operation is stable and high in efficiency.

Description

Technical Field

[0001] The present application relates to but is not limited to the technical field of refrigeration equipment, and specifically refers to a refrigeration equipment and a control method and a control device thereof. Background Art

[0002] At present, with the increasing attention paid to the depletion of the ozone layer and greenhouse gas issues at home and abroad, in order to solve the climate threat brought about by the growing market demand, countries around the world have accelerated the pace of research and development of new refrigerants. The research and development of new refrigerants is mainly divided into two directions. One is new synthetic refrigerants, which require zero ODP (ozone depletion potential) and low GWP (global warming potential). However, when synthetic refrigerants are released into the atmosphere, they are easily decomposed into other substances and may cause other unknown environmental hazards. The second direction is to turn the target to the first generation of refrigerants, namely natural refrigerants. Conventional natural refrigerants are similar to CO2 (carbon dioxide) / H2O (water) / ammonia / R290 (propane), etc. These refrigerants have always existed in the atmosphere, and their use and discharge as refrigerants have very little harm to the environment. R290 and ammonia are both flammable and explosive refrigerants. If there are leaks of varying degrees during use, they are very likely to cause explosions. In general cooling and heating conditions, CO2 works in a transcritical cycle, with a low overall COP (Coefficient of Performance) and a very high operating pressure. As a refrigerant, H2O is low-cost, easy to prepare and store, has zero ODP and zero GWP, and has little harm to the environment. Its working pressure is in a negative pressure state during cooling, making it safe and reliable, and is a relatively ideal refrigerant.

[0003] At present, the operating pressure of conventional air-conditioning systems is positive pressure, that is, the pressure is greater than atmospheric pressure. Even if there is a leak, it is the refrigerant that leaks from the refrigeration system into the environment. The sealing design of the whole machine is relatively simple, and welding and other sealing methods are often used to ensure that the sealing leakage meets the requirements. However, for water refrigeration systems, the working pressure of the entire system is less than atmospheric pressure, that is, a negative pressure state (the pressure is 1.94kpa when evaporating at 17℃), which makes the sealing of the whole machine a very big problem. After the system has been running for a long time, its vacuum degree cannot be guaranteed, and some non-condensable gases will leak in. These non-condensable gases have a great impact on the entire system. Obviously, the cooling capacity has dropped significantly.

[0004] The conventional design is to use an external vacuum pump. When the system vacuum is not enough, a mechanical vacuum pump is used for suction. Although this method can remove some non-condensable gases, it may also remove some refrigerant water, emulsifying the vacuum pump oil and affecting the operating reliability of the vacuum pump. Summary of the invention

[0005] The technical problem to be solved by the present application is to provide a refrigeration equipment and its control method and control device, which can use an ejector to draw the gas in the gas-liquid separator into the gas storage tank to maintain the vacuum degree in the refrigeration system. There is no need to set up an additional vacuum pump, which can avoid the problem of emulsification of the vacuum pump oil caused by pumping out the refrigerant water, and has stable operation and high efficiency.

[0006] The technical solution for solving the above technical problems in the embodiment of the present application is as follows: A refrigeration device, comprising: a refrigeration system, comprising a water vapor compressor, a condenser, a throttling device and an evaporator connected by pipelines; and an exhaust system, comprising a gas-liquid separator, a gas storage tank, an ejector and a pump; the gas-liquid separator is provided with an inlet, a first liquid outlet and an air outlet, the gas storage tank is provided with an air inlet, and the ejector is provided with a jet inlet, an air suction port and an exhaust port; the inlet is connected to the outlet end of the condenser, the first liquid outlet is connected to the inlet end of the throttling device, so that the condenser is connected to the throttling device through the gas-liquid separator; the air suction port is configured to be able to communicate with the air outlet, and the exhaust port is configured to be able to communicate with the air inlet, so that the air outlet can be connected to the air inlet through the ejector; the pump is connected to the jet inlet and is configured to pump fluid into the ejector, so that a negative pressure is generated at the air suction port, and then the gas in the gas-liquid separator is sucked in by the negative pressure and discharged into the gas storage tank.

[0007] The refrigeration equipment provided in the embodiment of the present application includes a refrigeration system and an exhaust system. The water vapor compressor, the condenser, the throttling device and the evaporator are connected by pipelines to form a refrigeration cycle. The exhaust system includes a gas-liquid separator, a gas storage tank, an ejector and a pump. The gas-liquid separator is connected to the refrigeration cycle and is located between the condenser and the throttling device. After the water vapor and the non-condensable gas enter the condenser, the water vapor condenses into liquid water, while the non-condensable gas does not condense, and flows out of the condenser with the liquid water and enters the gas-liquid separator for gas-liquid separation. The separated gas is located at the upper part of the gas-liquid separator, and the separated liquid is located at the lower part of the gas-liquid separator, and can flow out through the first liquid outlet of the gas-liquid separator and enter the throttling device for throttling and pressure reduction. During the operation of the system, the non-condensable gas will slowly accumulate at the upper part of the gas-liquid separator as the system operates.

[0008] When the non-condensable gas mixed into the system affects the pressure of the refrigeration system and needs to be exhausted, the pump can be turned on, and the gas outlet of the gas-liquid separator and the air intake of the ejector are connected, as well as the pump and the jet inlet of the ejector are connected. In this way, the pump can inject fluid into the jet inlet of the ejector, so that negative pressure is generated at the air intake of the ejector. Since the air intake of the ejector is located at the downstream side of the gas outlet of the gas-liquid separator, and located at the upstream side of the discharge port of the ejector and the air inlet of the gas storage tank, the air intake of the ejector can suck out the gas in the gas-liquid separator, and mix with the fluid injected into the ejector and discharge it into the gas storage tank, thereby realizing the gas in the gas-liquid separator being sucked into the gas storage tank. With the suction of the non-condensable gas in the gas-liquid separator, the system pressure of the refrigeration system will gradually return to the normal pressure range to ensure the reliability of the refrigeration operation of the system.

[0009] Compared with an external vacuum pump, this solution uses an ejector to draw the non-condensable gas in the gas-liquid separator into the gas storage tank. The ejector mainly generates a lower negative pressure area through the main nozzle through the main fluid (i.e. the fluid injected into the ejector by the pump) to draw the non-condensable gas in the gas-liquid separator. Since the ejector is a stationary part, it has good sealing performance, does not require electric energy to drive, and has stable exhaust. It also avoids the problem of vacuum pump oil emulsification caused by the vacuum pump pumping out refrigerant water, and has stable operation and high efficiency.

[0010] Based on the above technical solution, the present application can also be improved as follows.

[0011] In an exemplary embodiment, the pump is a liquid pump, and the liquid pump is configured to pump the liquid discharged from the condenser into the ejector to generate a negative pressure at the air intake port.

[0012] In an exemplary embodiment, the gas-liquid separator is provided with a second liquid outlet, and the inlet end of the liquid pump is connected to the second liquid outlet.

[0013] In an exemplary embodiment, the gas storage tank is also provided with a third liquid outlet, and a switchable liquid return pipeline is connected between the third liquid outlet and the gas-liquid separator, and the liquid return pipeline is configured to transport the liquid in the gas storage tank to the gas-liquid separator; the liquid return pipeline is provided with a first control valve, and the first control valve is configured to control the opening and closing and / or flow rate of the liquid return pipeline.

[0014] In an exemplary embodiment, the air outlet is connected to the air intake port via an air intake pipeline, and the air intake pipeline is provided with a second control valve, and the second control valve is configured to control the on-off and / or flow rate of the air intake pipeline; the pump is connected to the jet inlet via a jet pipeline, and the jet pipeline is provided with a third control valve, and the third control valve is configured to control the on-off and / or flow rate of the jet pipeline.

[0015] In an exemplary embodiment, the gas storage tank is further provided with a liquid inlet, the liquid inlet is connected to a switchable liquid inlet pipeline, and the liquid inlet pipeline is configured to transport liquid into the gas storage tank to facilitate the discharge of gas in the gas storage tank.

[0016] In an exemplary embodiment, the liquid inlet pipeline is configured to transport the liquid discharged from the condenser to the gas storage tank; the liquid inlet pipeline is provided with a fourth control valve, and the fourth control valve is configured to control the on-off and / or flow rate of the liquid inlet pipeline; and / or the pump is a liquid pump, and the two ends of the liquid inlet pipeline are respectively connected to the outlet end of the liquid pump and the liquid inlet of the gas storage tank.

[0017] In an exemplary embodiment, the gas storage tank is provided with an exhaust valve, and the exhaust valve is configured to switch to an open state when a set pressure is reached.

[0018] In an exemplary embodiment, the exhaust valve is further configured to switch to a closed state when liquid is detected.

[0019] In an exemplary embodiment, a one-way valve is provided between the exhaust port and the air inlet, and the one-way valve is configured to control the one-way flow of fluid from the exhaust port to the air inlet.

[0020] The present application also provides a control method for a refrigeration device as described in any one of the above embodiments, the control method comprising:

[0021] Determining that the refrigeration system reaches a first set exhaust condition;

[0022] The pump is started, and the air outlet is connected to the air inlet, and the pump is connected to the jet inlet, so that negative pressure is generated at the air intake port, and the gas in the gas-liquid separator is sucked in by the negative pressure and discharged into the gas storage tank.

[0023] In an exemplary embodiment, the control method further includes:

[0024] It is determined that the set exhaust end condition is reached, the air outlet and the air inlet are disconnected, and the pump and the jet inlet are disconnected.

[0025] In an exemplary embodiment, the first set exhaust condition includes: the evaporating pressure of the evaporator exceeds the set evaporating pressure range, and the condensing pressure of the condenser exceeds the set condensing pressure range; the set exhaust end condition includes: the evaporating pressure of the evaporator returns to within the set evaporating pressure range, and the condensing pressure of the condenser returns to within the set condensing pressure range.

[0026] In an exemplary embodiment, the gas storage tank is further provided with a liquid inlet, and the liquid inlet is connected to a liquid inlet pipeline that can be switched on and off; the control method further includes:

[0027] Based on determining that the second set exhaust condition is reached, the liquid inlet pipeline is opened to transport liquid into the gas storage tank to promote the exhaust of gas in the gas storage tank.

[0028] In an exemplary embodiment, the liquid inlet pipeline is configured to transport the liquid discharged from the condenser into the gas storage tank, the gas storage tank is further provided with a third liquid outlet, and a switchable liquid return pipeline is further connected between the third liquid outlet and the condenser; the control method further includes:

[0029] After the gas in the gas storage tank is exhausted, the liquid inlet pipeline is disconnected, and the liquid return pipeline is connected, so that the liquid in the gas storage tank flows back into the condenser;

[0030] Based on the complete discharge of the liquid in the gas storage tank, the liquid return pipeline is closed.

[0031] An embodiment of the present application further provides a control device, including a processor and a memory storing a computer program, wherein the processor implements the steps of the control method described in any one of the above embodiments when executing the computer program. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a refrigeration device provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of a control method provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of the working principle of a refrigeration device provided in some embodiments of the present application.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1 water vapor compressor, 11 primary compression unit, 12 secondary compression unit; 2 condenser; 3 gas-liquid separator; 4 throttling device; 5 evaporator; 6 liquid pump; 7 ejector; 8 gas storage tank;

[0037] 91 first control valve, 92 second control valve, 93 third control valve, 94 fourth control valve, 95 fifth control valve, 96 sixth control valve, 97 exhaust valve, 98 one-way valve;

[0038] 102 is an air suction pipeline, 104 is an ejection pipeline, 106 is a liquid inlet pipeline, 108 is a liquid return pipeline, and 110 is a cooling flow path. DETAILED DESCRIPTION

[0039] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0040] like Figure 1 As shown, an embodiment of the present application provides a refrigeration device, including: a refrigeration system and an exhaust system.

[0041] like Figure 1 As shown, the refrigeration system includes a water vapor compressor 1, a condenser 2, a throttling device 4 and an evaporator 5 connected by pipelines. The throttling device 4 can be, but is not limited to, an expansion valve.

[0042] The exhaust system includes a gas-liquid separator 3, an air storage tank 8, an ejector 7 and a pump. The gas-liquid separator 3 is provided with an inlet, a first liquid outlet and an air outlet. The air storage tank 8 is provided with an air inlet. The ejector 7 is provided with a jet inlet, an air intake and an exhaust outlet. The air outlet can be arranged at the top of the gas-liquid separator 3. The first liquid outlet can be arranged at the bottom of the gas-liquid separator 3. The air inlet can be arranged at the upper part of the air storage tank 8. The ejector 7 generally includes a main nozzle, a mixing section and a diffuser section connected in sequence. The jet inlet is projected at the inlet end of the main nozzle, the air intake is arranged at the outlet end of the main nozzle, and the exhaust outlet is arranged at the outlet end of the diffuser section. The flow area of ​​the main nozzle gradually decreases, the flow area of ​​the diffuser section gradually increases, and the flow area of ​​the mixing section can remain unchanged.

[0043] Among them, the inlet of the gas-liquid separator 3 is connected to the outlet end of the condenser 2, and the first liquid outlet of the gas-liquid separator 3 is connected to the inlet end of the throttling device 4, so that the condenser 2 is connected to the throttling device 4 through the gas-liquid separator 3. The air intake of the ejector 7 is configured to be connected to the air outlet, and the discharge outlet of the ejector 7 is configured to be connected to the air inlet, so that the air outlet can be connected to the air inlet through the ejector 7. The pump is connected to the jet inlet of the ejector 7, and is configured to pump fluid into the ejector 7, so that negative pressure is generated at the air intake, and then the gas in the gas-liquid separator 3 is sucked by the negative pressure and discharged into the gas storage tank 8.

[0044] The refrigeration equipment provided in the embodiment of the present application includes a refrigeration system and an exhaust system. The water vapor compressor 1, the condenser 2, the throttling device 4 and the evaporator 5 are connected by pipelines to form a refrigeration cycle. After the high-temperature and high-pressure water vapor discharged from the compressor enters the condenser 2 and condenses into a liquid refrigerant (water), it enters the evaporator 5 after throttling and reducing the pressure by the throttling device 4, evaporates and absorbs heat in the evaporator 5 to become a gaseous refrigerant (water vapor), and then flows back to the compressor. The evaporator 5 can be an indoor heat exchanger, which absorbs indoor heat by evaporation and cools the room. The condenser 2 can be an outdoor heat exchanger, which releases heat to the outdoor environment by condensation.

[0045] The exhaust system includes a gas-liquid separator 3, a gas storage tank 8, an ejector 7 and a pump. The gas-liquid separator 3 is connected to the refrigeration cycle and is located between the condenser 2 and the throttling device 4. After the water vapor and the non-condensable gas enter the condenser 2, the water vapor condenses into liquid water, while the non-condensable gas does not condense, and flows out of the condenser 2 with the liquid water and enters the gas-liquid separator 3 for gas-liquid separation. The separated gas is located at the upper part of the gas-liquid separator 3, and the separated liquid is located at the lower part of the gas-liquid separator 3, and can flow out through the first liquid outlet of the gas-liquid separator 3 and enter the throttling device 4 for throttling and pressure reduction. During the operation of the system, the non-condensable gas will slowly gather at the upper part of the gas-liquid separator 3 as the system operates.

[0046] When the non-condensable gas mixed in the system affects the pressure of the refrigeration system and needs to be exhausted, the pump can be turned on, and the gas outlet of the gas-liquid separator 3 is connected to the air intake of the ejector 7, and the pump is connected to the jet inlet of the ejector 7. In this way, the pump can inject fluid into the jet inlet of the ejector 7, so that negative pressure is generated at the air intake of the ejector 7. Since the air intake of the ejector 7 is located at the downstream side of the gas outlet of the gas-liquid separator 3, and located at the upstream side of the discharge port of the ejector 7 and the air inlet of the gas storage tank 8, the air intake of the ejector 7 can suck out the gas in the gas-liquid separator 3, and mix with the fluid injected into the ejector 7 and discharge it into the gas storage tank 8, thereby realizing the gas in the gas-liquid separator 3 is sucked into the gas storage tank 8. With the suction of the non-condensable gas in the gas-liquid separator 3, the system pressure of the refrigeration system will gradually return to the normal pressure range to ensure the reliability of the refrigeration operation of the system.

[0047] Compared with the external vacuum pump, this solution uses an ejector 7 to draw the non-condensable gas in the gas-liquid separator 3 into the gas storage tank 8. The ejector 7 mainly generates a lower negative pressure area through the main nozzle through the main fluid (i.e., the fluid injected into the ejector by the pump) to draw the non-condensable gas in the gas-liquid separator 3. Since the ejector 7 is a stationary part, it has good sealing performance, does not require electric energy to drive, and has stable exhaust, and avoids the problem of vacuum pump oil emulsification caused by the vacuum pump pumping out refrigerant water, and has stable operation and high efficiency.

[0048] In some embodiments, the ejector 7 and the gas storage tank 8 are split structures, such as Figure 1 As shown, they are connected by pipes.

[0049] In other embodiments, the ejector 7 and the gas storage tank 8 are an integrated structure.

[0050] In some exemplary embodiments, the pump is a liquid pump 6, such as Figure 1 As shown, the liquid pump 6 is configured to pump the liquid discharged from the condenser 2 into the ejector 7 to generate negative pressure at the air inlet. In this way, the exhaust system does not need to introduce other fluid sources, nor does it need to be connected to other external fluid sources, which is conducive to simplifying the structure of the refrigeration equipment and reducing the production cost of the refrigeration equipment.

[0051] The liquid pump 6 can be connected to the lower part of the condenser 2, or to the flow path on the downstream side of the condenser 2, such as to the gas-liquid separator 3. Figure 1 shown.

[0052] Of course, the pump is not limited to the liquid pump 6, and may also be an air pump. The liquid pump 6 may also be connected to other fluid sources.

[0053] In some exemplary embodiments, the gas-liquid separator 3 is provided with a second liquid outlet, and the inlet end of the liquid pump 6 is connected to the second liquid outlet. Figure 1 The second liquid outlet can be arranged at the bottom of the gas-liquid separator 3 .

[0054] In this way, the liquid pump 6 will not suck the liquid in the refrigeration system pipeline, which is beneficial to avoid a significant impact on the pipeline pressure of the refrigeration system. In this way, during the operation of the exhaust system, the refrigeration system does not need to be shut down, which is beneficial to improving the user experience.

[0055] In some exemplary embodiments, the gas storage tank 8 is further provided with a third liquid outlet. The third liquid outlet can be arranged at the bottom of the gas storage tank 8. A liquid return pipeline 108 which can be switched on and off is also connected between the third liquid outlet and the gas-liquid separator 3. Figure 1 The liquid return line 108 is configured to transport the liquid in the gas storage tank 8 to the gas-liquid separator 3. The liquid return line 108 is provided with a first control valve 91, as shown in FIG. Figure 1 As shown, the first control valve 91 is configured to control the on / off state and / or flow rate of the liquid return line 108 .

[0056] During the exhaust process, since the liquid pump 6 draws part of the refrigerant in the refrigeration system into the gas storage tank 8, the amount of refrigerant in the refrigeration system will be reduced, affecting the refrigeration effect. Therefore, a liquid return pipeline 108 is provided between the gas storage tank 8 and the condenser 2 to ensure that the liquid in the gas storage tank 8 can flow back into the gas-liquid separator 3. In this way, the amount of refrigerant in the refrigeration system remains basically unchanged, and the refrigeration capacity of the refrigeration equipment will not be affected.

[0057] When the ejector 7 draws the gas in the gas-liquid separator 3, even if a portion of water vapor is drawn out (or water vapor is mixed in the non-condensable gas), the water vapor will turn into liquid water when flowing into the diffuser section of the ejector 7, and then be deposited at the bottom of the gas storage tank 8, and finally flow back to the refrigeration system through the return liquid pipeline 108.

[0058] As for the solution of an external vacuum pump, the vacuum pump will directly extract the non-condensable gas and part of the water and discharge them into the external environment, causing the amount of refrigerant in the refrigeration system to gradually decrease, thus seriously affecting the refrigeration effect of the refrigeration equipment.

[0059] The first control valve 91 may be a flow control valve, which can control the on-off state of the liquid return pipeline 108 and the flow rate of the liquid return pipeline 108 .

[0060] Of course, the first control valve 91 may only be able to control the on-off of the liquid return pipeline 108, or only be able to control the flow of the liquid return pipeline 108. Other control valves may also be provided on the liquid return pipeline 108 to control the on-off or flow of the liquid return pipeline 108.

[0061] In some exemplary embodiments, the air outlet is connected to the air inlet through the air inlet line 102, such as Figure 1 The air intake line 102 is provided with a second control valve 92, as shown in FIG. Figure 1 As shown, the second control valve 92 is configured to control the on-off and / or flow rate of the suction line 102 .

[0062] The pump is connected to the jet inlet through the jet pipeline 104. The jet pipeline 104 is provided with a third control valve 93, and the third control valve 93 is configured to control the on-off and / or flow rate of the jet pipeline 104.

[0063] When the refrigeration system needs to be exhausted, the first control valve 91, the second control valve 92 and the pump can be opened to connect the suction pipeline 102 and the ejection pipeline 104, so that the gas in the gas-liquid separator 3 can be sucked into the ejector 7 and then discharged into the gas storage tank 8. The flow rate of the suction pipeline 102 can also be adjusted by the first control valve 91.

[0064] When the refrigeration system does not need to be exhausted, the first control valve 91, the second control valve 92 and the pump may be closed to avoid adverse effects on the normal refrigeration of the refrigeration system.

[0065] The second control valve 92 may be a flow control valve, which can control the on-off of the air intake pipeline 102 and the flow rate of the air intake pipeline 102. Of course, the second control valve 92 may only control the on-off of the air intake pipeline 102, or only control the flow rate of the air intake pipeline 102. Other control valves may also be provided on the air intake pipeline 102 to control the on-off or flow rate of the air intake pipeline 102.

[0066] Similarly, the third control valve 93 may be a flow control valve, which can control the on-off of the jet pipeline 104 and the flow rate of the jet pipeline 104. Of course, the third control valve 93 may only control the on-off of the jet pipeline 104, or only control the flow rate of the jet pipeline 104. Other control valves may also be provided on the jet pipeline 104 to control the on-off or flow rate of the jet pipeline 104.

[0067] In some exemplary embodiments, the gas storage tank 8 is further provided with a liquid inlet. The liquid inlet may be provided at the bottom of the gas storage tank 8. The liquid inlet is connected to a liquid inlet pipeline 106 which can be switched on and off. Figure 1 As shown, the liquid inlet pipeline 106 is configured to transport liquid into the gas storage tank 8 to facilitate the discharge of gas in the gas storage tank 8.

[0068] When the gas tank 8 needs to be vented, the liquid inlet pipeline 106 can be opened to transport liquid into the gas tank 8. As the liquid level in the gas tank 8 increases, the gas pressure in the gas tank 8 becomes greater and greater, which is conducive to venting the gas in the gas tank 8 to the outside.

[0069] In some exemplary embodiments, the liquid inlet pipeline 106 is configured to deliver the liquid discharged from the condenser 2 to the gas storage tank 8, such as Figure 1 The liquid inlet pipeline 106 is provided with a fourth control valve 94, as shown in FIG. Figure 1 As shown, the fourth control valve 94 is configured to control the on-off and / or flow rate of the liquid inlet pipeline 106 .

[0070] In this way, the exhaust system does not need to introduce other fluid sources, nor does it need to be connected to other external fluid sources, which is conducive to simplifying the structure of the refrigeration equipment and reducing the production cost of the refrigeration equipment. When the gas storage tank 8 needs to be exhausted, the fourth control valve 94 can be opened. When the gas storage tank 8 is exhausted, the fourth control valve 94 can be closed.

[0071] Furthermore, the liquid inputted into the gas storage tank 8 by the liquid inlet pipeline 106 can flow back into the gas-liquid separator 3 through the liquid return pipeline 108, thereby not causing a significant reduction in the amount of refrigerant in the refrigeration system. In this way, the amount of refrigerant in the refrigeration system remains substantially unchanged, and the refrigeration capacity of the refrigeration equipment is not affected.

[0072] The liquid inlet pipeline 106 may be connected to the gas-liquid separator 3 , or may be connected to the flow path on the downstream side of the condenser 2 (such as connected to the gas-liquid separator 3 ).

[0073] In some exemplary embodiments, the pump is a liquid pump 6, such as Figure 1 As shown, two ends of the liquid inlet pipeline 106 are respectively connected to the outlet end of the liquid pump 6 and the liquid inlet of the gas storage tank 8.

[0074] In this way, the liquid pump 6 is used not only to inject liquid into the ejector 7, but also to input liquid into the gas storage tank 8. This can save a pump and shorten the total length of the exhaust system pipeline, which is beneficial to improving the integration of the exhaust system, simplifying the structure of the refrigeration equipment, and further beneficial to reducing the cost of the refrigeration equipment.

[0075] In some exemplary embodiments, the gas storage tank 8 is provided with an exhaust valve 97, such as Figure 1 As shown, the exhaust valve 97 is configured to switch to an open state when a set pressure is reached.

[0076] In this way, when the gas pressure in the gas storage tank 8 reaches the exhaust pressure of the exhaust valve 97, the exhaust valve 97 is opened by the gas and automatically switches to the open state, so that the exhaust process can be realized. In this way, the opening of the exhaust valve 97 does not need to be controlled by the electronic control program, which is conducive to simplifying the electronic control program of the refrigeration equipment.

[0077] In some exemplary embodiments, the exhaust valve 97 is further configured to switch to a closed state when liquid is detected. When the exhaust valve 97 detects liquid, it indicates that the gas in the gas storage tank 8 has been emptied, so it switches to a closed state to prevent the liquid in the gas storage tank 8 from being discharged from the exhaust valve 97.

[0078] The exhaust valve 97 can be a safety valve with droplet detection, and the specific form is not limited as long as it can meet the functional requirements. For example, the safety valve has a built-in liquid sensor, and when the liquid sensor detects liquid, the safety valve automatically closes.

[0079] In some exemplary embodiments, a one-way valve 98 is provided between the exhaust port and the air inlet. Figure 1 As shown, the one-way valve 98 is configured to control the fluid to flow from the outlet to the air inlet in one direction, so as to prevent the gas and liquid in the gas storage tank 8 from flowing back to the ejector 7 and the gas-liquid separator 3 during the exhaust process of the gas storage tank 8.

[0080] In some exemplary embodiments, the water vapor compressor 1 includes a plurality of compression modules connected in sequence, such as Figure 1 At least one compression module includes a compression unit and a cooler (not shown in the figure). The cooler is located at the downstream side of the compression unit and is connected to the compression unit, and each compression module includes a compression unit.

[0081] The refrigeration device also includes a cooling system, and the cooling system includes a cooling flow path 110, such as Figure 1 The input end of the cooling flow path 110 is connected to the evaporator 5 and / or the condenser 2, and the output end of the cooling flow path 110 is connected to the cooler, which is configured to transport the cooling medium in the evaporator 5 and / or the condenser 2 to the cooler to reduce the superheat of the refrigerant discharged from the cooler.

[0082] Since the refrigerant temperature in the evaporator 5 and the refrigerant temperature in the condenser 2 are both lower than the refrigerant temperature in the compressor, the embodiment of the present application utilizes the cooling flow path 110 to transport the cooling medium in the evaporator 5 and / or the condenser 2 to the cooler, and cools the refrigerant discharged from the adjacent compression unit on the upstream side of the cooler. The temperature of the refrigerant discharged after being cooled by the cooler is reduced, thereby reducing the superheat of the refrigerant discharged from the compression module including the compression unit and the cooler, and avoiding the refrigerant from being overheated and affecting the normal operation of the subsequent compression module and the refrigeration equipment. As a result, the refrigeration equipment can use the cooling medium in the system to cool the multi-stage compressor without the need for an external cooling source, which is conducive to reducing the volume of the refrigeration equipment and reducing the cost of the refrigeration equipment.

[0083] Among them, the input end of the cooling flow path 110 can be connected to the evaporator 5 and / or the condenser 2, and the cooling medium can be directly extracted from the evaporator 5 and / or the condenser 2. Since the evaporator 5 and the condenser 2 are large in size and contain a large amount of cooling medium, the effect of extracting a certain amount of cooling medium on the pressure of the refrigeration system is relatively small. However, if the input end of the cooling flow path 110 is connected to the pipeline between the condenser 2 and the evaporator 5, the effect on the pressure of the refrigeration system is relatively large, so this solution is conducive to improving the reliability of the refrigeration equipment.

[0084] Alternatively, the input end of the cooling flow path 110 may also be connected to the flow path between the condenser 2 and the evaporator 5. For example, the input end of the cooling flow path 110 is connected to the liquid pump 6. In this way, the liquid pump 6 is also used to pump the cooling medium to the water vapor compressor 1, which can reduce the number of pumps of the refrigeration equipment and help reduce the cost of the refrigeration equipment.

[0085] In some embodiments, the water vapor compressor 1 includes two compression modules, such as Figure 1 As shown, both compression modules include coolers, and the fifth control valve 95 and the sixth control valve 96 are respectively provided on the pipeline between the cooling flow path 110 and the two coolers. The fifth control valve 95 and the sixth control valve 96 are configured to control the on-off and / or flow rate of the cooling flow path 110. The cooling flow path 110 can be two, or can include a cooling main path and two cooling branches. The cooling main path is connected to the liquid pump 6, and the two cooling branches are respectively connected to the two coolers. A spray device can be provided in the cooler to spray the cooling medium onto the high-temperature and high-pressure water vapor, which is beneficial to increase the contact area and thus improve the cooling effect.

[0086] The present application also provides a control method for a refrigeration device according to any one of the above embodiments. Figure 2 As shown, the control method includes:

[0087] Step S202: Determine whether the refrigeration system reaches a first set exhaust condition;

[0088] Step S204: Start the pump, connect the air outlet with the air inlet, connect the pump with the jet inlet, so that negative pressure is generated at the air intake port, and then use the negative pressure to suck the gas in the gas-liquid separator and discharge it into the gas storage tank.

[0089] The first set exhaust condition refers to the condition under which the refrigeration system needs to be exhausted. When this condition is met, it indicates that the vacuum degree of the refrigeration system is insufficient, which will affect the cooling capacity of the refrigeration system.

[0090] When the non-condensable gas mixed in the system affects the pressure of the refrigeration system and needs to be exhausted, that is, when the first set exhaust condition is met, the pump can be turned on, and the gas outlet of the gas-liquid separator 3 is connected with the air intake of the ejector 7, and the pump is connected with the jet inlet of the ejector 7. In this way, the pump can inject fluid into the jet inlet of the ejector 7, so that negative pressure is generated at the air intake of the ejector 7. Since the air intake of the ejector 7 is located at the downstream side of the gas outlet of the gas-liquid separator 3, and located at the upstream side of the discharge port of the ejector 7 and the air inlet of the gas storage tank 8, the air intake of the ejector 7 can suck out the gas in the gas-liquid separator 3, and mix with the fluid injected into the ejector 7 and discharge it into the gas storage tank 8, thereby realizing the gas in the gas-liquid separator 3 is sucked into the gas storage tank 8. With the suction of the non-condensable gas in the gas-liquid separator 3, the system pressure of the refrigeration system will gradually return to the normal pressure range to ensure the reliability of the refrigeration operation of the system.

[0091] Compared with the external vacuum pump, this solution uses an ejector 7 to draw the non-condensable gas in the gas-liquid separator 3 into the gas storage tank 8. The ejector 7 mainly generates a lower negative pressure area through the main nozzle through the main fluid (i.e., the fluid injected into the ejector by the pump) to draw the non-condensable gas in the gas-liquid separator 3. Since the ejector 7 is a stationary part, it has good sealing performance, does not require electric energy to drive, and has stable exhaust, and avoids the problem of vacuum pump oil emulsification caused by the vacuum pump pumping out refrigerant water, and has stable operation and high efficiency.

[0092] The first set exhaust condition may include: the evaporation pressure of the evaporator 5 exceeds the set evaporation pressure range, and the pressure of the condenser 2 exceeds the set condensation pressure range.

[0093] The pressure of the evaporator 5 and the pressure of the condenser 2 are easy to monitor, and the evaporation pressure of the evaporator 5 and the condensation pressure of the condenser 2 are used to judge whether the pressure of the refrigeration system is normal, with high accuracy. When the evaporation pressure of the evaporator 5 exceeds the set evaporation pressure range, and the condensation pressure of the condenser 2 exceeds the set condensation pressure range, it indicates that the amount of non-condensable gas accumulated in the refrigeration system is relatively large, and exhaust treatment is required, otherwise it will seriously affect the refrigeration effect of the refrigeration equipment.

[0094] In some exemplary embodiments, the control method further includes:

[0095] Make sure that the set exhaust end condition is reached, disconnect the air outlet and the air inlet, and disconnect the pump and the jet inlet.

[0096] Setting the exhaust end condition refers to the condition that the refrigeration system does not need mechanical exhaust. When this condition is met, it indicates that the vacuum degree of the refrigeration system has returned to the normal range, so the exhaust to the gas storage tank 8 can be stopped, thereby disconnecting the air outlet and the air inlet, and disconnecting the pump and the jet inlet.

[0097] In some exemplary embodiments, the exhaust end condition is set to include: the evaporation pressure of the evaporator 5 is restored to within the set evaporation pressure range, and the condensation pressure of the condenser 2 is restored to within the set condensation pressure range. The pressure of the evaporator 5 and the pressure of the condenser 2 are easy to monitor, and the evaporation pressure of the evaporator 5 and the condensation pressure of the condenser 2 are used to determine whether the vacuum degree of the refrigeration system has returned to normal, with high accuracy.

[0098] In some embodiments, the air outlet is connected to the air inlet through an air inlet pipeline 102, and a second control valve 92 is provided on the air inlet pipeline 102. The pump is connected to the jet inlet through a jet pipeline 104, and a third control valve 93 is provided on the jet pipeline 104.

[0099] Therefore, the steps of connecting the air outlet with the air inlet and connecting the pump with the jet inlet may be: opening the second control valve 92 and the third control valve 93. The steps of disconnecting the air outlet with the air inlet and disconnecting the pump with the jet inlet may be: closing the second control valve 92 and the third control valve 93.

[0100] In some exemplary embodiments, the gas storage tank 8 is further provided with a liquid inlet, and the liquid inlet is connected to a liquid inlet pipeline 106 which can be switched on and off.

[0101] The control method also includes:

[0102] Based on the determination that the second set exhaust condition is reached, the liquid inlet pipeline 106 is opened to transport liquid into the gas storage tank 8 to facilitate the exhaust of gas in the gas storage tank 8 .

[0103] The second set exhaust condition refers to the condition that the gas tank 8 needs to be exhausted. When the gas tank 8 needs to be exhausted, the liquid inlet pipeline 106 is opened to transport liquid into the gas tank 8. As the liquid level in the gas tank 8 increases, the gas pressure in the gas tank 8 becomes greater and greater, which is conducive to venting the gas in the gas tank 8 to the outside.

[0104] The second set exhaust condition and the set exhaust end condition may be the same, or may include: the exhaust end condition is set, and the air outlet is disconnected from the air inlet, and the pump is disconnected from the jet inlet.

[0105] Alternatively, the second set exhaust condition may also be other conditions, for example, the gas storage tank 8 may be exhausted only when the gas in the gas storage tank reaches a certain amount after the gas-liquid separator has exhausted the gas for multiple times.

[0106] In some exemplary embodiments, the liquid inlet pipeline 106 is configured to transport the liquid discharged from the condenser 2 to the gas storage tank 8. The gas storage tank 8 is also provided with a third liquid outlet, and a switchable liquid return pipeline 108 is further connected between the third liquid outlet and the condenser 2.

[0107] The control method also includes:

[0108] After the gas in the gas storage tank 8 is exhausted, the liquid inlet pipeline 106 is disconnected, and the liquid return pipeline 108 is connected, so that the liquid in the gas storage tank 8 flows back into the condenser 2;

[0109] After all the liquid in the gas storage tank 8 is discharged, the liquid return pipeline 108 is closed.

[0110] During the exhaust process of the gas-liquid separator 3 and the gas storage tank 8, since the liquid pump 6 draws part of the refrigerant in the refrigeration system into the gas storage tank 8, the amount of refrigerant in the refrigeration system will be reduced, affecting the refrigeration effect. Therefore, when the gas storage tank 8 is exhausted, the liquid inlet pipeline 106 is disconnected and the liquid return pipeline 108 is connected to ensure that the liquid in the gas storage tank 8 can flow back to the condenser 2. In this way, the amount of refrigerant in the refrigeration system remains basically unchanged and will not affect the refrigeration capacity of the refrigeration equipment.

[0111] In some embodiments, a fourth control valve 94 is provided on the liquid inlet pipeline 106. Therefore, the step of connecting the liquid inlet pipeline 106 may be: opening the fourth control valve 94. The step of disconnecting the liquid inlet pipeline 106 may be: closing the fourth control valve 94.

[0112] The first control valve 91 is disposed on the liquid return pipeline 108. Therefore, the step of connecting the liquid return pipeline 108 may be: opening the first control valve 91. The step of disconnecting the liquid return pipeline 108 may be: closing the first control valve 91.

[0113] In the embodiment of the present application, the refrigeration device may be, but is not limited to, an air conditioner. The water vapor compressor 1 may be, but is not limited to, a multi-stage compressor. The multi-stage compressor may be a two-stage compressor or a compressor with more stages. The following takes the refrigeration device being an air conditioner and the compressor being a two-stage compressor as an example to explain the working principle of the refrigeration device.

[0114] like Figure 1As shown, the air conditioner of this embodiment is a natural refrigerant water refrigeration air conditioning system. The refrigeration equipment mainly includes: a primary compression unit 11, a secondary compression unit 12, a primary cooler (i.e., a cooler located on the downstream side of the primary compression unit 11 and adjacent to the primary compression unit 11), a secondary cooler (i.e., a cooler located on the downstream side of the secondary compression unit 12 and adjacent to the second compression unit), an evaporator 5, a condenser 2, a throttling device 4, a liquid pump 6, an ejector 7, an air storage tank 8, a control valve, etc. The primary compression unit 11 and the primary cooler constitute a primary compression module, and the secondary compression unit 12 and the secondary cooler constitute a secondary compression module. The primary compression module and the secondary compression module are two compression modules of a two-stage compressor, and the primary compression module is a first-stage compression module. The secondary compression module is located on the downstream side of the primary compression module and is a final-stage compression module.

[0115] The refrigeration system also includes a cooling trunk circuit, two parallel cooling branches, and two control valves (a fifth control valve 95 and a sixth control valve 96) respectively arranged on the two cooling branches. Figure 1 As shown. The water pump is arranged in the cooling main circuit. One cooling flow path 110 cools the main circuit and the cooler. Another cooling flow path 110 connects the cooling main circuit and the secondary cooler.

[0116] The evaporator 5 mainly evaporates the liquid refrigerant water, absorbs the heat of the room, and cools the room. After evaporation in the evaporator 5, the water vapor flows into the primary compression unit 11 and the secondary compression unit 12 for compression. The pressure and temperature of the water vapor after compression increase. The function of interstage cooling through the cooling flow path 110 is mainly to reduce the superheat of the water vapor after compression by the primary compression unit 11 and the secondary compression unit 12. The water vapor coming out of the compressor and after interstage cooling enters the condenser 2 for condensation, discharges the heat of the water vapor to the outside, and flows into the gas-liquid separator 3 after condensation, and then flows from the gas-liquid separator 3 into the throttling device 4 for pressure reduction and throttling. After pressure reduction and throttling, it enters the evaporator 5 for evaporation to achieve the refrigeration cycle.

[0117] During the initial operation of the entire system, the system monitors the pressure of the evaporator 5 and the condenser 2. When the pressure is normal (i.e., within the corresponding set pressure range), the system operates normally. At this time, the first control valve 91, the second control valve 92, the third control valve 93, the fourth control valve 94, and the exhaust valve 97 are in the default closed state. When there is leakage during the operation of the system, part of the non-condensable gas leaks into the system, and the evaporation pressure P1 and the condensation pressure P5 will increase. During the operation of the system, the non-condensable gas will slowly accumulate in the gas-liquid separator 3 as the system operates. When the system detects that P1 and P5 are not within the normal fluctuation range (i.e., beyond the corresponding set pressure range), the second control valve 92 and the third control valve 93 are opened. At this time, the supercooled water in the gas-liquid separator 3 will be pressurized by the liquid pump 6, and flow into the main nozzle (i.e., the jet inlet) of the ejector 7 through the third control valve 93. Through the main nozzle of the ejector 7, the non-condensable gas in the gas-liquid separator 3 is sucked over, and then flows into the gas storage tank 8. During the gas extraction process, the refrigeration system does not stop and is always in operation. When the system detects that P1 and P5 are within the normal fluctuation range, the second control valve 92 and the third control valve 93 are closed, and the fourth control valve 94 is opened. At this time, the supercooled water in the gas-liquid separator 3 will be pressurized by the liquid pump 6 and flow into the bottom of the storage tank. As the amount of water increases, the non-condensable gas on the upper part of the gas storage tank 8 is compressed. When it is compressed to the safety pressure of the exhaust valve 97, the exhaust valve 97 opens and the non-condensable gas is automatically discharged. After the non-condensable gas is emptied, when the exhaust valve 97 detects that liquid is flowing, the exhaust valve 97 is automatically closed and the first control valve 91 is opened. The liquid water in the gas storage tank 8 flows back to the gas-liquid separator 3 of the refrigeration system through the first control valve 91. After all the water flows back, the first control valve 91 is closed, and the exhaust process ends.

[0118] The evaporator 5 mainly evaporates liquid water, absorbs the heat of the room through heat exchange with the room, and transfers it to the outside through the compressor and the condenser 2. The evaporator 5 is not limited in form, and can be a fin-tube evaporator 5, a flooded evaporator 5, a spray evaporator 5, etc.

[0119] The condenser 2 is mainly used to condense the water vapor at the outlet of the secondary compression unit 12 after inter-stage cooling, and a subcooling section is also provided at the tail of the heat exchanger to further cool the saturated liquid into subcooled water. Its form is not limited, and it can be a fin-tube condenser 2, a spray condenser 2, a shell-and-tube condenser 2, etc.

[0120] The gas-liquid separator 3 mainly separates the condensed liquid water from the non-condensable gas, so as to facilitate the suction and exhaustion of the non-condensable gas.

[0121] The throttling device 4 is mainly used to reduce the pressure of the high-pressure supercooled water at the outlet of the gas-liquid separator 3. Since the water refrigeration system operates in a negative pressure environment, the pressure difference is very small, so the form of the throttling device 4 is not limited to a hole baffle, a liquid level column, a capillary tube, etc.

[0122] The second control valve 92, the third control valve 93, and the fourth control valve 94 may be flow control valves. The first control valve 91, the fifth control valve 95, and the sixth control valve 96 may be pressure-reducing throttle valves. The exhaust valve 97 may be a safety valve with droplet detection, and is not limited to a form, as long as its function meets the system requirements.

[0123] The ejector 7 mainly generates a lower negative pressure zone through the main fluid passing through the main nozzle to eject the non-condensable gas from the gas-liquid separator 3. The advantage of the ejector 7 is that it is a static part with good sealing performance, does not require electric energy to drive, and is stable and effective.

[0124] When the refrigeration system is running, the evaporator 5 evaporates and absorbs the heat in the room. The water vapor flows out from the upper outlet of the evaporator 5. At this time, the refrigerant pressure and temperature are P1 and T1 respectively. T1 should have a certain degree of superheat. Then the water vapor flows into the primary compression unit 11, and the water vapor is compressed by the primary compression unit 11. After compression, it is discharged from the primary compression unit 11. At this time, the pressure and temperature of the water vapor rise to P2 and T2 respectively. At this time, the superheat of the water vapor is relatively high. In order to ensure the normal compression later, it needs to be cooled. At this time, cold water is introduced into the bottom of the gas-liquid separator 3, and its superheat is reduced through the liquid pump 6 and the fifth control valve 95. The superheat is reduced to within the preset range, which can be 2°C to 5°C. At this time, the pressure and temperature of the water vapor are P3 and T3 (T3<T2). After being reduced, it flows into the secondary compression unit 12. After passing through the secondary compression unit 12, the pressure and temperature continue to rise. At this time, the pressure reaches the target design pressure, and the temperature superheat is relatively large. The same form is adopted to introduce cold water at the bottom of the gas-liquid separator 3, and its superheat is reduced through the liquid pump 6 and the sixth control valve 96, and the superheat is reduced to within the preset range. The preset range can be 2°C to 5°C. At this time, the pressure and temperature of the water vapor are P4 and T4 respectively. After that, it flows into the condenser 2 to condense into liquid water, and then the liquid water is further supercooled into supercooled water (pressure and temperature are P5 and T5). The supercooled water flows into the evaporator 5 after the throttling device 4 reduces the pressure and throttles, and evaporates in the evaporator 5. After evaporation, it continues to flow into the multi-stage compressor, thereby completing the refrigeration cycle.

[0125] The structure of the refrigeration equipment is as follows Figure 1 As shown, the working principle is as follows Figure 3As shown. In this embodiment, the presence of non-condensable gas is detected by the sensors of the evaporator 5 and the condenser 2 in the refrigeration equipment, and the non-condensable gas is collected in the gas-liquid separator 3 through the system circulation for separation. The condensed liquid refrigerant water is at the bottom of the gas-liquid separator 3, and the non-condensable gas is collected in the upper part of the gas-liquid separator 3. After the non-condensable gas is detected, the relevant control valve is opened to start the exhaust system. The exhaust system mainly pressurizes the supercooled water through the liquid pump 6, and then flows into the inlet of the ejector 7 after pressurization. A lower vacuum area is generated through the main nozzle of the ejector 7, and the non-condensable gas is sucked over, and the pressure is expanded through the expansion section at the end of the ejector 7, and flows into the gas storage tank 8. Then, by changing the state of the corresponding control valve, liquid water flows in from the bottom of the gas storage tank 8, and the non-condensable gas is compressed. When a certain pressure is reached, the non-condensable gas is automatically discharged. After the non-condensable gas is discharged, the liquid water flows back to the gas-liquid separator 3 through the control valve, and an exhaust cycle of the non-condensable gas is completed.

[0126] Therefore, the refrigeration equipment and control method provided in the embodiment of the present application mainly control the flow direction of the system refrigerant water through multiple control valves after the system monitors the non-condensable gas. The non-condensable gas is sucked into the gas storage tank 8 through the ejector 7 without stopping the system, and then discharged to the outside of the system through the exhaust valve 97. This solution does not require an additional vacuum pump, and the system does not need to be shut down. The exhaust is stable and the operation is smooth. After multiple exhausts, the amount of refrigerant in the system remains basically unchanged. The natural refrigerant vacuum maintenance method of the present application does not require the addition of an additional drive source, has no moving parts, and has stable operation and high efficiency.

[0127] An 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 described in any of the above embodiments, and thus has all the above-mentioned beneficial effects, which will not be repeated here.

[0128] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), 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. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0129] An embodiment of the present application also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the control method described in any of the above embodiments are implemented, thereby having all the above-mentioned beneficial effects, which will not be repeated here.

[0130] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0131] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0132] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0133] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean 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, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0134] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 present 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, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0135] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0136] In any one or more of the above exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may 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. A computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium that facilitates the transmission of a computer program from one place to another, such as according to a communication protocol. In this way, a computer-readable medium may generally correspond to a non-temporary tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. A data storage medium may 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 technology described in the present disclosure. A computer program product may include a computer-readable medium.

[0137] By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, 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 can be accessed by a computer. Moreover, any connection may also be referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of 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 (transient) media, but are directed to non-transient tangible storage media. As used herein, disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, or Blu-ray disks, etc., where disks typically reproduce data magnetically, while optical disks use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0138] For example, instructions may 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 logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, the term "processor" as used herein may refer to any of the above structures or any other structures suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.

[0139] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or equipment, including wireless mobile phones, integrated circuits (ICs) or a group of ICs (e.g., chipsets). Various components, modules or units are described in the embodiments of the present disclosure to emphasize the functional aspects of the devices configured to perform the described techniques, but they do not necessarily need to be implemented by different hardware units. Instead, as described above, the various units can be combined in a codec hardware unit or provided by a collection of interoperable hardware units (including one or more processors as described above) in combination with suitable software and / or firmware.

Claims

1. A refrigeration device, characterized in that: include: A refrigeration system, including a water vapor compressor, a condenser, a throttling device and an evaporator connected by pipelines; and An exhaust system includes a gas-liquid separator, an air storage tank, an ejector and a pump; the gas-liquid separator is provided with an inlet, a first liquid outlet and an air outlet, the air storage tank is provided with an air inlet, and the ejector is provided with a jet inlet, an air intake port and an exhaust port; the inlet is connected with the outlet end of the condenser, the first liquid outlet is connected with the inlet end of the throttling device, so that the condenser is connected with the throttling device through the gas-liquid separator; the air intake port is configured to be able to communicate with the air outlet, and the exhaust port is configured to be able to communicate with the air inlet, so that the air outlet can be connected with the air inlet through the ejector; the pump is connected with the jet inlet, and is configured to pump fluid into the ejector, so that a negative pressure is generated at the air intake port, and then the gas in the gas-liquid separator is sucked in by the negative pressure and discharged into the air storage tank.

2. The refrigeration equipment according to claim 1, characterized in that: The pump is a liquid pump, and the liquid pump is configured to pump the liquid discharged from the condenser into the ejector to generate negative pressure at the air intake port.

3. The refrigeration equipment according to claim 2, characterized in that: The gas-liquid separator is provided with a second liquid outlet, and the inlet end of the liquid pump is connected to the second liquid outlet.

4. The refrigeration equipment according to claim 3, characterized in that: The gas storage tank is also provided with a third liquid outlet, and a switchable liquid return pipeline is connected between the third liquid outlet and the gas-liquid separator, and the liquid return pipeline is configured to transport the liquid in the gas storage tank to the gas-liquid separator; The liquid return pipeline is provided with a first control valve, and the first control valve is configured to control the on-off and / or flow rate of the liquid return pipeline.

5. The refrigeration device according to any one of claims 1 to 4, characterized in that: The air outlet is connected to the air intake port through an air intake pipeline, and the air intake pipeline is provided with a second control valve, and the second control valve is configured to control the on-off and / or flow rate of the air intake pipeline; The pump is communicated with the jet inlet through a jet pipeline. The jet pipeline is provided with a third control valve. The third control valve is configured to control the on-off and / or flow rate of the jet pipeline.

6. The refrigeration device according to any one of claims 1 to 4, characterized in that: The gas storage tank is also provided with a liquid inlet, which is connected to a switchable liquid inlet pipeline, and the liquid inlet pipeline is configured to transport liquid into the gas storage tank to facilitate the discharge of gas in the gas storage tank.

7. The refrigeration device according to claim 6, characterized in that: The liquid inlet pipeline is configured to transport the liquid discharged from the condenser to the gas storage tank; the liquid inlet pipeline is provided with a fourth control valve, and the fourth control valve is configured to control the on-off and / or flow rate of the liquid inlet pipeline; and / or The pump is a liquid pump, and the two ends of the liquid inlet pipeline are respectively connected to the outlet end of the liquid pump and the liquid inlet of the gas storage tank.

8. The refrigeration device according to claim 7, characterized in that: The gas storage tank is provided with an exhaust valve, and the exhaust valve is configured to switch to an open state when a set pressure is reached.

9. The refrigeration device according to claim 8, characterized in that: The exhaust valve is also configured to switch to a closed state when liquid is detected.

10. The refrigeration device according to any one of claims 1 to 4, characterized in that: A one-way valve is provided between the exhaust port and the air inlet, and the one-way valve is configured to control the one-way flow of fluid from the exhaust port to the air inlet.

11. A control method, characterized in that: For a refrigeration device as claimed in any one of claims 1 to 10, the control method comprises: Determining that the refrigeration system reaches a first set exhaust condition; The pump is started, and the air outlet is connected to the air inlet, and the pump is connected to the jet inlet, so that negative pressure is generated at the air intake port, and the gas in the gas-liquid separator is sucked in by the negative pressure and discharged into the gas storage tank.

12. The control method according to claim 11, characterized in that: Also includes: It is determined that the set exhaust end condition is reached, the air outlet and the air inlet are disconnected, and the pump and the jet inlet are disconnected.

13. The control method according to claim 12, characterized in that: The first set exhaust condition includes: the evaporation pressure of the evaporator exceeds the set evaporation pressure range, and the condenser pressure of the condenser exceeds the set condensation pressure range; The set exhaust end condition includes: the evaporation pressure of the evaporator is restored to within the set evaporation pressure range, and the condensation pressure of the condenser is restored to within the set condensation pressure range.

14. The control method according to any one of claims 11 to 13, characterized in that: The gas storage tank is also provided with a liquid inlet, and the liquid inlet is connected to a liquid inlet pipeline that can be switched on and off; The control method further comprises: Based on determining that the second set exhaust condition is reached, the liquid inlet pipeline is opened to transport liquid into the gas storage tank to promote the exhaust of gas in the gas storage tank.

15. The control method according to claim 14, characterized in that: The liquid inlet pipeline is configured to transport the liquid discharged from the condenser into the gas storage tank, and the gas storage tank is also provided with a third liquid outlet, and a switchable liquid return pipeline is also connected between the third liquid outlet and the condenser; The control method further comprises: After the gas in the gas storage tank is exhausted, the liquid inlet pipeline is disconnected, and the liquid return pipeline is connected, so that the liquid in the gas storage tank flows back into the condenser; Based on the complete discharge of the liquid in the gas storage tank, the liquid return pipeline is closed.

16. A control device, characterized in that: The system comprises a processor and a memory storing a computer program, wherein when the processor executes the computer program, the steps of the control method according to any one of claims 11 to 15 are implemented.

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