Vapor-liquid separation device and control method

Abstract

The invention relates to a vapor-liquid separation device and a control method. Wherein the vapor-liquid separation device comprises a cylinder body, an electromagnetic coil and a magnetic baffle plate, and the cylinder body is used for accommodating a vapor-liquid mixture and providing a separation space; the electromagnetic coil is mounted at the top end of the barrel; the magnetic baffle is used for dividing the barrel into a lower liquid area and an upper gas area, and the magnetic baffle is installed in the barrel and located below the electromagnetic coil; the electromagnetic coil is configured to generate magnetic force in a power-on state, and the magnetic baffle moves in the barrel in the longitudinal direction under the action of the magnetic force.

Description

Technical Field

[0001] This application relates to the field of vapor-liquid separators, and particularly to a vapor-liquid separation device and a control method thereof. Background Art

[0002] In refrigeration and air-conditioning systems, the compressor is one of the core components, responsible for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, thereby driving the entire refrigeration cycle. However, during actual operation, due to unreasonable system design, improper operation, improper adjustment of the electronic expansion valve, or the entry of moisture, impurities, etc. into the system, liquid hammer occurs in the compressor (that is, during the operation of the compressor, due to certain reasons, a large amount of liquid refrigerant or lubricating oil is sucked into the cylinder or compression chamber of the compressor. These liquids cannot be compressed like gas during the compression process, thus causing an impact on the internal components of the compressor and resulting in mechanical damage), leading to damage to the compressor, a decline in performance, and in severe cases, the compressor may need to be replaced, and the unit may be shut down for a long time, increasing the maintenance cost.

[0003] Although using a vapor-liquid separator is a way to solve compressor liquid hammer, when the unit operates in heating mode, the superheat degree of the suction pipe of the system is relatively low, resulting in a relatively high liquid level in the vapor-liquid separator. The liquid flowing down from the inlet pipe is easily splashed into the outlet pipe, and then enters the compressor along with the suction pipe, causing liquid hammer in the compressor.

[0004] Therefore, it is urgent to improve the traditional vapor-liquid separator. Summary of the Invention

[0005] This application provides a vapor-liquid separation device and a control method thereof to solve the technical problem of liquid hammer in the compressor existing in the above-mentioned prior art.

[0006] The present invention provides a vapor-liquid separation device, which includes: a cylinder body, an electromagnetic coil, and a magnetic baffle. Among them, the cylinder body is used to accommodate the vapor-liquid mixture and provide a separation space; the electromagnetic coil is installed at the top of the cylinder body; the magnetic baffle is used to divide the cylinder body into a liquid area below and a gas area above. The magnetic baffle is installed inside the cylinder body and is located below the electromagnetic coil; the electromagnetic coil is configured to generate a magnetic force in the energized state, and the magnetic force acts on the magnetic baffle to enable the magnetic baffle to move in the longitudinal direction inside the cylinder body.

[0007] Wherein, the cylinder body includes an internal cavity and an air outlet communicating with the internal cavity; it further includes an outlet pipe, one end of the outlet pipe is hermetically connected to the air outlet, and the other end of the outlet pipe is located above the magnetic baffle.

[0008] Among them, the vapor-liquid separation device includes a liquid inlet and a liquid inlet pipe. One end of the liquid inlet pipe is hermetically connected to the liquid inlet, and the other end of the liquid inlet pipe is used to extend into the internal cavity, and the other end of the liquid inlet pipe is located below the magnetic baffle.

[0009] Among them, the part of the gas outlet pipe extending into the internal cavity is configured as a U-shaped structure.

[0010] Among them, the magnetic baffle is configured as a plate-like structure, and the plate-like structure includes a first through hole for the liquid inlet pipe to pass through.

[0011] Among them, the magnetic baffle is configured as a plate-like structure, and the plate-like structure includes a second through hole and a third through hole, and the second through hole and the third through hole are respectively used for two pipe bodies of the U-shaped structure to pass through.

[0012] Among them, the magnetic baffle is configured as a plate-like structure, and the plate-like structure includes a plurality of gap holes for gas to pass through.

[0013] Among them, the vapor-liquid separation device includes a support structure arranged along the inner wall of the cylinder, and the support structure is used to limit the lowest position of the magnetic baffle.

[0014] The present invention also provides an air conditioner including the above-mentioned vapor-liquid separation device.

[0015] The present invention also provides a control method applied to the above-mentioned vapor-liquid separation device, and the control method includes:

[0016] Detect the suction superheat degree of the vapor-liquid separation device;

[0017] Determine that the suction superheat degree is greater than a preset temperature value;

[0018] Control the electromagnetic coil to be energized. The electromagnetic coil generates magnetic force in the energized state, and the magnetic baffle rises in the cylinder under the action of the magnetic force.

[0019] Among them, when the suction superheat degree is less than the preset temperature value, control the electromagnetic coil to be de-energized, and the magnetic baffle descends in the cylinder.

[0020] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0021] The vapor-liquid separation device and control method provided by the embodiments of the present application are configured such that a magnetic baffle is disposed inside the cylinder, and the electromagnetic coil is installed at the top of the cylinder, that is, above the magnetic baffle. In this way, the magnetic baffle and the electromagnetic coil form an electromagnetic switch. When the electromagnetic coil is energized, a magnetic field is generated to attract the magnetic baffle to rise. When the electromagnetic coil is de-energized, the baffle will descend under the action of gravity. The electromagnetic coil can be connected to the main board of the air-conditioning system. To prevent the magnetic baffle from excessively affecting the flow rate of the refrigerant, the magnetic baffle only descends to function when needed, and its on / off is controlled by the suction superheat of the system (the difference between the actual temperature of the refrigerant before entering the compressor and the saturation temperature at this pressure). By detecting the suction superheat and automatically adjusting the position of the baffle, intelligent control can be achieved, improving the reliability and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following briefly introduces the accompanying drawings required for describing the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] One or more embodiments are illustrated by way of example in the accompanying drawings, which do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0025] Figure 1 Structural schematic of the vapor-liquid separation device when the electromagnetic coil of the embodiment of the present application is de-energized Figure 1 ;

[0026] Figure 2 For Figure 1 Cross-sectional view taken along line B-B in

[0027] Figure 3 Structural schematic of the vapor-liquid separation device when the electromagnetic coil of the embodiment of the present application is energized Figure 2 ;

[0028] Figure 4 For Figure 3 Cross-sectional view taken along line C-C in

[0029] Figure 5 Top view structural schematic of the magnetic baffle provided by the embodiment of the present application.

[0030] Description of the reference numerals in the drawings:

[0031] 1. Gas-liquid separation device; 11. Cylinder body; 111. Internal cavity; 111A. Liquid area; 111B. Gas area; 112. Gas outlet; 12. Electromagnetic coil; 13. Magnetic baffle; 131. First through hole; 132. Second through hole; 133. Third through hole; 134. Gap hole; 14. Gas outlet pipe; 15. Liquid inlet; 16. Liquid inlet pipe; 17. Support structure. Detailed implementation manners

[0032] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the scope of protection of the present application.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] For the convenience of description, spatially relative relationship terms may be used in the text to describe the relative position relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure undergoes a position flip or attitude change or movement state change, then these directional indications will also change accordingly. For example, an element described as "below other elements or features" or "beneath other elements or features" will then be oriented as "above other elements or features" or "on other elements or features". Therefore, the exemplary term "below" may include the orientations of above and below. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatially relative relationship descriptions used in the text have been interpreted accordingly.

[0035] A vapor-liquid separator is a device used to separate vapor-liquid mixtures and is widely applied in refrigeration and air-conditioning systems, the petrochemical industry, natural gas processing systems, and steam power systems. Exemplarily, in the refrigeration cycle of an air conditioner, the vapor-liquid separator is used to ensure that the refrigerant entering the compressor is in a gaseous state, prevent liquid refrigerant from entering the compressor and causing liquid slugging, protect the normal operation of the compressor, and at the same time improve the refrigeration efficiency. Exemplarily, in large refrigeration systems such as supermarket freezers and cold storage facilities, the vapor-liquid separator can effectively separate the vapor and liquid phases of the refrigerant, ensure the stable operation of the system, reduce energy consumption, and extend the service life of the equipment. Exemplarily, in the distillation process in petroleum refining and chemical production, the vapor-liquid separator is used to separate the vapor-liquid mixture in the overhead distillate to obtain pure gaseous and liquid products, improving product quality and production efficiency. Exemplarily, during a chemical reaction process, vapor-liquid mixed products or intermediate products are often generated. The vapor-liquid separator can separate these mixtures for subsequent processing and machining. Exemplarily, during natural gas extraction, the natural gas coming out of the wellhead is usually accompanied by liquid water, condensate, etc. The vapor-liquid separator separates the natural gas and the liquid at the wellhead, enabling the natural gas to be transported and processed more efficiently and reducing the risk of pipeline corrosion and blockage. Exemplarily, in a natural gas liquefaction plant, the vapor-liquid separator is one of the key equipment. It is used to separate substances in different phases during the cooling and liquefaction process of natural gas to ensure the purity and quality of the product. Exemplarily, in the steam system of a thermal power plant, the vapor-liquid separator is used to separate the moisture in the steam, increase the dryness of the steam, reduce the erosion and damage of the steam carrying water to equipment such as steam turbines, and improve the power generation efficiency. Exemplarily, the steam generated by boilers used in industrial production often contains a certain amount of moisture. The vapor-liquid separator can separate the moisture in the steam to provide dry steam for industrial production, meeting the requirements of the production process.

[0036] Taking the application of a vapor-liquid separator in a steam power system as an example, when using an existing vapor-liquid separator, when the heat pump unit operates in heating mode, the superheat degree of the system suction pipe is relatively low, resulting in a relatively high liquid level in the vapor-liquid separator. The liquid flowing down from the inlet pipe is easily splashed into the outlet pipe and then enters the compressor along with the suction pipe, causing liquid slugging in the compressor.

[0037] It can be seen that when the heat pump unit operates in heating mode, it is prone to the problem of compressor liquid slugging. Overall, due to the low superheat degree of the suction pipe in the system, a large amount of incompletely evaporated liquid refrigerant enters the gas-liquid separator, causing the liquid level to rise; and the internal structure design of the gas-liquid separator is unreasonable, unable to effectively prevent liquid splashing, which further leads to the liquid flowing down the intake pipe being easily introduced into the outlet pipe and finally entering the compressor, triggering liquid slugging. Compressor liquid slugging not only damages important components such as compressor pistons and connecting rods, shortening their service life, but also disrupts the stability of the refrigeration cycle and reduces the heating efficiency. To sum up, to solve this problem, the risk of compressor liquid slugging can be reduced and the stable operation of the heat pump unit can be ensured by adjusting the refrigerant charge, optimizing the evaporator operating parameters, improving the structure of the gas-liquid separator, installing a liquid level control device, etc.

[0038] To alleviate the above problems, the embodiments of the present application provide a new gas-liquid separation device and control method, mainly relying on an electromagnetic coil and a magnetic baffle to block liquid splashing from entering the compressor.

[0039] Refer to Figures 1 - 5 , the embodiments of the present application provide a gas-liquid separation device 1, including: a cylinder body 11, an electromagnetic coil 12 and a magnetic baffle 13. Among them, the cylinder body 11 is used to accommodate the gas-liquid mixture and provide a separation space; the electromagnetic coil 12 is installed at the top of the cylinder body 11; the magnetic baffle 13 is used to divide the cylinder body 11 into a lower liquid area 111A and an upper gas area 111B. The magnetic baffle 13 is installed inside the cylinder body 11 and is located below the electromagnetic coil 12; the electromagnetic coil 12 is configured to generate a magnetic force in the energized state, and the magnetic baffle 13 moves longitudinally inside the cylinder body 11 under the action of the magnetic force.

[0040] Overall, the cylinder body 11 of this solution provides a space for accommodating and separating the gas-liquid mixture, which is the basic structure; the electromagnetic coil 12 is installed at the top of the cylinder body 11 and is in communication with the inside, generating a magnetic force in the energized state. The magnetic baffle 13 is located below the electromagnetic coil 12 and can move longitudinally inside the cylinder body 11 under the action of the magnetic force. This design can flexibly adjust the position of the magnetic baffle 13 as needed. By changing the spatial distribution of the liquid area 111A and the gas area 111B, when the liquid level rises, the height of the magnetic baffle 13 can be adjusted in time to effectively block the liquid splashing from entering the outlet pipe 14 and then flowing into the compressor. Compared with the traditional gas-liquid separator, it has stronger adaptability in dealing with liquid level changes.

[0041] Exemplarily, by detecting the suction superheat degree inside the cylinder body 11, when the suction superheat degree is relatively high, the on-off and magnetic force magnitude of the electromagnetic coil 12 can be accurately controlled to adapt to the liquid level changes under different working conditions.

[0042] Exemplarily, the overall structure of the vapor-liquid separation device 1 has strong sealing performance. Sealing structures are provided at each connection position or each port, which can prevent external water vapor from affecting the detection of the suction superheat degree inside the cylinder 11.

[0043] Exemplarily, the inner wall of the cylinder 11 can provide a guiding channel for the magnetic baffle 13, which can be used to limit the movement direction of the magnetic baffle 13 under the action of magnetic force from deviating.

[0044] Specifically, the magnetic baffle 13 moves longitudinally inside the cylinder 11 under the magnetic force generated by the electromagnetic coil 12 to achieve vapor-liquid separation. The inner wall of the cylinder 11 provides a guiding channel for the magnetic baffle 13, which can effectively limit the movement direction of the magnetic baffle 13 under the action of magnetic force and prevent it from deviating. This design ensures that the magnetic baffle 13 can move precisely on a predetermined path, continuously and stably separating the cylinder 11 into a liquid region 111A and a gas region 111B, preventing the liquid blocking failure caused by the baffle deviation, and thus avoiding the liquid splashing into the compressor to cause liquid hammer. At the same time, the stable movement direction also reduces the unnecessary collision and friction between the magnetic baffle 13 and the cylinder 11, extends the service life of the baffle and the entire device, improves the reliability and stability of the operation of the vapor-liquid separation device 1, and ensures that it can play the vapor-liquid separation role efficiently for a long time in equipment such as heat pump units.

[0045] Exemplarily, the cylinder 11 is usually cylindrical or tubular, with a certain height and diameter, to provide enough space to accommodate the vapor-liquid mixture and separate it. An air outlet 112 is provided at the top of the cylinder 11 for discharging the separated gas, and a liquid discharge port may be provided at the bottom to regularly discharge the accumulated liquid. Some cylinders 11 may also be provided with a liquid inlet 15 on the side or top surface, so that the vapor-liquid mixture can enter the separator evenly. In addition, for the convenience of installation and maintenance, components such as a maintenance port and an observation window may be provided on the cylinder 11.

[0046] Exemplarily, the cylinder 11 is generally made of materials with good corrosion resistance, strength and sealing performance. Common materials include stainless steel, such as 304 stainless steel or 316 stainless steel, which can resist the erosion of various chemical substances and are suitable for different working environments; for some occasions with higher pressure, carbon steel may be used and anti-corrosion treatment may be carried out to meet the strength requirements; in some special application scenarios, such as the food and pharmaceutical industries, non-toxic plastics or glass materials meeting relevant hygiene standards may be selected to ensure that the separation process will not contaminate the product.

[0047] Exemplarily, the structure of the magnetic baffle 13 is adapted to the inner diameter shape of the cylinder 11, and it is advisable to be able to completely divide the cylinder 11 into upper and lower regions. Some special structures may be provided on the magnetic baffle 13, such as a sealing lip at the edge, which is used to closely fit with the inner wall of the cylinder 11 to prevent liquid from leaking through the gap; some magnetic baffles 13 may also be designed to have a certain arc or concave-convex shape to enhance its stability and separation effect under the action of magnetic force. In addition, in order to facilitate cooperation with the electromagnetic coil 12, the magnetic baffle 13 is usually made of magnetic material, and its magnetic distribution may be specially designed to ensure accurate response to electromagnetic force under different working conditions.

[0048] Exemplarily, the magnetic baffle 13 is mainly made of magnetic materials such as ferrite and neodymium iron boron. Ferrite has high magnetism and good corrosion resistance, and the cost is relatively low, which is suitable for general working environments; neodymium iron boron has stronger magnetism and can generate a large magnetic force in a smaller volume, which is suitable for occasions with higher magnetic requirements, but the price is relatively high. In order to improve the wear resistance and corrosion resistance of the magnetic baffle 13, a protective film such as an epoxy resin coating or a Teflon coating may be coated on its surface. In some occasions with high hygiene requirements, magnetic materials and coatings meeting food-grade or medical-grade standards are also selected to prevent harmful substances in the materials from being released into the separated substances.

[0049] Considering the relative position scheme of the magnetic baffle 13, the cylinder 11 includes an internal cavity 111 and an air outlet 112 communicating with the internal cavity 111; it also includes an air outlet pipe 14, one end of the air outlet pipe 14 is hermetically connected to the air outlet 112, and the other end of the air outlet pipe 14 is located above the magnetic baffle 13.

[0050] Through the design of the structure of the cylinder 11 and the position of the air outlet pipe 14, the effectiveness of vapor-liquid separation is significantly enhanced. Combining with the core function of the vapor-liquid separation device 1 in the previous text to block liquid splashing from entering the compressor by the electromagnetic coil 12 and the magnetic baffle 13, in this scheme, the internal cavity 111 of the cylinder 11 accommodates the vapor-liquid mixture, the air outlet 112 communicates with the internal cavity 111, and one end of the air outlet pipe 14 is hermetically connected to the air outlet 112 to ensure the tightness of the gas outflow path and avoid gas leakage affecting the separation effect; the other end is located above the magnetic baffle 13. Such a layout enables the gaseous refrigerant in the upper gas region 111B to flow out smoothly through the air outlet pipe 14 after being separated by the magnetic baffle 13. At the same time, since the port of the air outlet pipe 14 is higher than the magnetic baffle 13, even when the liquid level in the liquid region 111A is relatively high and the liquid has a tendency to splash, the magnetic baffle 13 can effectively block the liquid from entering the air outlet pipe 14 upward, further ensuring from the structure that only gaseous refrigerant enters the compressor, greatly reducing the risk of liquid hammer in the compressor, and improving the stability and reliability of the entire vapor-liquid separation device 1.

[0051] Considering the position scheme of the magnetic baffle 13 relative to the liquid inlet pipe 16, in the vapor-liquid separation device 1 provided by the embodiments of the present application, it includes a liquid inlet 15 and a liquid inlet pipe 16. One end of the liquid inlet pipe 16 is in sealed communication with the liquid inlet 15, and the other end of the liquid inlet pipe 16 is for extending into the internal cavity 111, and the other end of the liquid inlet pipe 16 is located below the magnetic baffle 13.

[0052] In this way, one end of the liquid inlet pipe 16 is in sealed communication with the liquid inlet 15, ensuring that the vapor-liquid mixture will not leak when entering the internal cavity 111, and guaranteeing the sealing and safety of the device operation; while the other end is located below the magnetic baffle 13, so that the vapor-liquid mixture entering the internal cavity 111 directly falls into the liquid region 111A. Under the action of gravity, the liquid naturally settles below the magnetic baffle 13, and the gas diffuses upward to the gas region 111B. This layout effectively avoids the vapor-liquid mixture directly impacting the gas region 111B above the magnetic baffle 13 and prevents the liquid from splashing to the outlet pipe 14 due to the impact of the incoming liquid. At the same time, the magnetic baffle 13 can fully play its separating role, firmly blocking the liquid below, further ensuring that only the gaseous refrigerant can enter the compressor through the outlet pipe 14, greatly reducing the risk of liquid slugging in the compressor, and improving the stability and reliability of the device when working in equipment such as heat pump units. In addition, this design can also reduce the unnecessary collision and friction between the liquid and the magnetic baffle 13, help extend the service life of the magnetic baffle 13 and the entire device, and make the vapor-liquid separation process smoother and more efficient, improving the operating efficiency of the entire system.

[0053] Exemplarily, the liquid inlet 15 is usually a circular or oval opening formed on the vapor-liquid separator cylinder 11, and its size is determined according to the processing capacity of the separator and the incoming liquid flow rate. To facilitate the connection with the liquid inlet pipe 16, a flange or a threaded interface may be provided around the liquid inlet 15. The flange has evenly distributed bolt holes for connecting to the corresponding flange of the liquid inlet pipe 16 through bolts; the threaded interface is to machine an internal thread on the inner wall of the liquid inlet 15 to cooperate with the external thread at one end of the liquid inlet pipe 16. Some liquid inlets 15 may also be provided with a flow guiding structure, such as an inclined flow guiding plate inside the liquid inlet 15, so that the incoming vapor-liquid mixture can enter the cylinder 11 in a certain direction and angle, avoiding directly impacting the cylinder 11 wall or other components.

[0054] Exemplarily, the liquid inlet pipe 16 is generally a circular pipe, and its diameter is matched with the liquid inlet 15 to ensure good connection and fluid transportation. The length of the liquid inlet pipe 16 is determined according to the actual installation requirements. Usually, it needs to be long enough so that one end can extend into the internal cavity 111 of the vapor-liquid separator and be located at a suitable position below the magnetic baffle 13, and the other end is connected to the liquid inlet 15 or an external vapor-liquid transportation pipe. One end of the liquid inlet pipe 16 close to the liquid inlet 15 may be structurally designed according to the connection method, such as having a flange or external thread. To reduce fluid resistance, the inner wall of the liquid inlet pipe 16 is usually required to be smooth, and some flow disturbance structures, such as spiral guide vanes, may be provided inside the pipe to enable the vapor-liquid mixture to be preliminarily mixed or separated before entering the cylinder body 11, thereby improving the separation effect.

[0055] Exemplarily, the material of the liquid inlet 15 is usually the same as that of the cylinder body 11. Stainless steel (such as 304 stainless steel, 316 stainless steel) is usually selected, which has good corrosion resistance, strength and sealing performance, and can withstand the pressure and chemical erosion of the vapor-liquid mixture; in some special environments, such as the food and pharmaceutical industries, non-toxic plastics or glass materials meeting hygienic standards are used to ensure that the substances to be processed will not be contaminated.

[0056] Exemplarily, the liquid inlet pipe 16 is usually made of stainless steel pipe, which can adapt to different working environments and has good compressive and corrosion resistance; for some occasions with special requirements, such as environments where anti-static or electromagnetic compatibility needs to be considered, alloy materials with corresponding characteristics or special coating treatments may be applied on the pipe surface; in some cases of low-pressure and non-corrosive media, plastic pipes, such as polypropylene (PP) pipes or polytetrafluoroethylene (PTFE) pipes, may also be used. These plastic pipes have the advantages of light weight, corrosion resistance and good insulation performance.

[0057] Considering the structural scheme of the gas outlet pipe 14 in the cylinder body 11, in the vapor-liquid separation device 1 provided by the embodiment of the present application, the part of the gas outlet pipe 14 extending into the internal cavity 111 is configured as a U-shaped structure.

[0058] In this way, the part of the outlet pipe 14 extending into the internal cavity 111 is designed as a U-shaped structure, which can improve the performance and reliability of the vapor-liquid separation device 1 in many aspects. Combined with the core demand of the vapor-liquid separation device 1 to prevent liquid from entering the compressor, the U-shaped structure uses the characteristic of liquid sinking due to gravity to form a natural "liquid seal" barrier. When the liquid enters the U-shaped area of ​​the outlet pipe 14 due to rising liquid level or splashing, it will accumulate at the bottom of the U-shaped, and will not continue to enter the subsequent pipeline upward, effectively blocking the path of the liquid entering the compressor, greatly reducing the risk of compressor liquid hammer. At the same time, the U-shaped structure extends the flow path of the gas in the outlet pipe 14, so that the gas has more time for secondary separation. Even if a small amount of gas carrying droplets enters the outlet pipe 14, the droplets will be separated at the bend of the U-shaped structure due to inertia and gravity, further improving the vapor-liquid separation effect. In addition, the U-shaped structure can also buffer the impact and vibration caused by gas flow to a certain extent, reduce the damage to the equipment caused by unstable airflow, ensure the long-term stable operation of the device, and enhance the reliability and safety of the entire vapor-liquid separation system.

[0059] Considering the specific structural scheme of the magnetic baffle 13, in the vapor-liquid separation device 1 provided in the embodiment of the present application, the magnetic baffle 13 is constructed as a plate-like structure, and the plate-like structure includes a first through hole 131, and the first through hole 131 is used for the liquid inlet pipe 16 to pass through.

[0060] In this way, the design of the plate-like structure and the first through hole 131 has a significant effect on the function realization and performance improvement of the vapor-liquid separation device 1. Combined with the core requirement that the vapor-liquid separation device 1 relies on the magnetic baffle 13 to separate the gas and liquid areas 111A and prevent the liquid from entering the compressor, the magnetic baffle 13 is designed as a plate-like structure, which can separate the cylinder 11 into the upper and lower liquid areas 111A and gas areas 111B in a large area and stably, providing a solid barrier foundation for vapor-liquid separation. The setting of the first through hole 131 allows the liquid inlet pipe 16 to pass through, which cleverly solves the contradiction between the liquid inlet pipe 16 extending into the internal cavity 111 of the cylinder 11 and the separation function of the magnetic baffle 13, so that the liquid inlet pipe 16 can accurately transport the vapor-liquid mixture to the liquid area 111A below the magnetic baffle 13, ensuring that the liquid can settle naturally and the gas diffuses upward. This structural design avoids the sealing failure and liquid leakage problems that may be caused by the liquid inlet pipe 16 directly penetrating the magnetic baffle 13, ensuring the effective blocking effect of the magnetic baffle 13 on the liquid, making the vapor-liquid separation process smoother and more efficient. At the same time, the stable plate structure combined with the precise through-hole design also helps the magnetic baffle 13 to move longitudinally more stably under the magnetic force generated by the electromagnetic coil 12, always maintaining a good separation effect, further reducing the risk of liquid splashing into the outlet pipe 14 and causing liquid hammer in the compressor, and improving the reliability and stability of the operation of the entire vapor-liquid separation device 1.

[0061] Considering the specific structural solution of the magnetic baffle 13, the magnetic baffle 13 is configured as a plate-like structure, and the plate-like structure includes a second through-hole 132 and a third through-hole 133, and the second through-hole 132 and the third through-hole 133 are respectively used for two pipe bodies of the U-shaped structure to pass through.

[0062] In this way, configuring the magnetic baffle 13 as a plate-like structure with the second through-hole 132 and the third through-hole 133 and cooperating with the structure of the U-shaped outlet pipe 14 is of great significance for improving the performance of the vapor-liquid separation device 1. Combining the previous text, the vapor-liquid separation device 1 needs to effectively separate vapor and liquid and prevent liquid from entering the compressor. In this solution, the plate-like magnetic baffle 13 itself can stably divide the cylinder body 11 into a liquid and a gas region 111B, forming a reliable physical barrier. The settings of the second through-hole 132 and the third through-hole 133 are precisely adapted to the passing of the two pipe bodies of the U-shaped outlet pipe 14, enabling the U-shaped outlet pipe 14 to firmly penetrate the magnetic baffle 13, ensuring that the U-shaped outlet pipe 14 plays the roles of "liquid seal" and secondary separation while also guaranteeing the integrity of the spatial separation of the cylinder body 11 by the magnetic baffle 13.

[0063] Specifically, such a structural design can enable the outlet pipe 14 and the magnetic baffle 13 to be closely combined and not interfere with each other. The magnetic baffle 13 can move longitudinally under the magnetic force of the electromagnetic coil 12 to flexibly adjust the spatial distribution of the liquid and gas region 111B. Even if the liquid level changes, it can always effectively block the liquid. After the U-shaped outlet pipe 14 passes through the through-hole, it can stably separate and transport the gas. When the liquid enters the U-shaped structure due to the rising or splashing of the liquid level, the tight fit between the through-hole and the pipe body can prevent the liquid from leaking from the gap to the gas region 111B. The two work together to further enhance the vapor-liquid separation effect, reduce the risk of liquid hammer caused by the liquid entering the compressor, improve the stability and reliability of the operation of the entire device, and ensure the safe and efficient operation of equipment such as heat pump units.

[0064] Further considering the structural solution of the magnetic baffle 13, the magnetic baffle 13 is configured as a plate-like structure, and the plate-like structure includes a plurality of gap holes 134, and the gap holes 134 are used for gas to pass through.

[0065] In this way, the magnetic baffle 13 is designed as a plate-like structure with multiple gap holes 134. Starting from the core requirements of vapor-liquid separation, it has multiple positive effects on the performance and function realization of the entire device. Combining the above text, the vapor-liquid separation device 1 aims to effectively separate liquid and gas and prevent liquid from entering the compressor. In this structural solution, the plate-like magnetic baffle 13, as a key component separating the upper and lower regions of the separation cylinder 11, provides a basic physical barrier for vapor-liquid separation. The existence of multiple gap holes 134 breaks the complete enclosure of the plate-like structure and provides an exclusive channel for gas to pass through. While the magnetic baffle 13 separates the liquid and gas regions 111B, it does not hinder the smooth flow of gas from the gas region 111B above the lower liquid region 111A to the outlet pipe 14.

[0066] Specifically, the design of the gap holes 134 ensures the high efficiency of gas circulation, avoiding excessive gas flow resistance caused by the complete enclosure of the baffle and affecting the working efficiency of equipment such as heat pump units. At the same time, the size of the gap holes 134 is reasonably designed to effectively prevent liquid from splashing into the upper gas region 111B through the gap holes 134. Due to the surface tension and gravity of the liquid, it is difficult for the liquid to penetrate upward through the small gap holes 134, thus ensuring that the magnetic baffle 13 can still effectively block the liquid. In addition, this structure can also balance the air pressure above and below the baffle to a certain extent, making the magnetic baffle 13 move more smoothly and flexibly under the magnetic force generated by the electromagnetic coil 12, enabling it to better adjust its position according to the liquid level change, always maintaining a good vapor-liquid separation effect, further reducing the risk of liquid hammer in the compressor, and enhancing the stability and reliability of the operation of the vapor-liquid separation device 1.

[0067] Considering the support scheme for the magnetic baffle 13, the vapor-liquid separation device 1 includes a support structure 17. The support structure 17 is arranged along the inner wall of the cylinder 11, and the support structure 17 is used to limit the lowest position of the magnetic baffle 13.

[0068] Exemplarily, the support structure 17 can be integrally formed with the cylinder 11.

[0069] Exemplarily, the support structure 17 can be detachably connected to the cylinder 11.

[0070] In this way, the support structure 17 solution focuses on the stable operation and function guarantee of the magnetic baffle 13, which is of great significance for improving the performance of the vapor-liquid separation device 1. Combining the core function of the vapor-liquid separation device 1 described above, which separates the gas and liquid regions 111A by the magnetic baffle 13 and prevents liquid from entering the compressor, the support structure 17 arranged along the inner wall of the cylinder 11 can accurately limit the lowest position of the magnetic baffle 13. During the operation of the device, when the electromagnetic coil 12 is not energized or the magnetic force is small, the magnetic baffle 13 drops under its own gravity, and the support structure 17 can prevent the magnetic baffle 13 from dropping excessively, preventing it from colliding with or interfering with components such as the bottom of the cylinder 11 or the liquid inlet pipe 16, effectively protecting the magnetic baffle 13 and other device components from damage and extending the service life of the equipment.

[0071] At the same time, the stable lowest position limit ensures that the relative positions of the magnetic baffle 13 and components such as the liquid inlet pipe 16 and the gas outlet pipe 14 are always within a reasonable range. On the one hand, it enables the vapor-liquid mixture flowing out of the liquid inlet pipe 16 to stably fall into the liquid region 111A below the magnetic baffle 13; on the other hand, it ensures the connectivity between the gas outlet pipe 14 and the gas region 111B above the magnetic baffle 13, maintaining smooth gas discharge. In addition, the support structure 17 can also provide lateral support for the magnetic baffle 13 during the process of its rising or falling under the electromagnetic force, enhancing the stability of the magnetic baffle 13 during movement, and avoiding tilting or offset of the baffle caused by air flow impact or uneven magnetic force, so that the magnetic baffle 13 can more reliably play the role of vapor-liquid separation, continuously reduce the risk of liquid hammer in the compressor, and improve the reliability and stability of the operation of the vapor-liquid separation device 1.

[0072] Exemplarily, the support structure 17 can be configured as an annular support member. An annular support member is arranged on the inner wall of the cylinder 11, which can be a continuous ring or a segmented annular structure. Such an annular support member can evenly support the magnetic baffle 13, making it evenly stressed in the circumferential direction, effectively limiting the lowest position of the magnetic baffle 13, and at the same time can also play a certain role in restricting the lateral movement of the magnetic baffle 13.

[0073] Exemplarily, the support structure 17 can be configured as a plurality of evenly distributed support columns: a plurality of support columns are evenly arranged along the circumferential direction of the inner wall of the cylinder 11. These support columns can be cylindrical, prismatic or other shapes. The top of each support column contacts the magnetic baffle 13, and the lowest position of the magnetic baffle 13 is restricted through multiple support points, and it can adapt to the stress conditions of the magnetic baffle 13 at different positions to a certain extent, providing relatively flexible support.

[0074] Exemplarily, the support structure 17 can be configured as a spiral support bar, and a spiral support bar is provided on the inner wall of the cylinder body 11. This structure can provide continuous and variable support forces as the magnetic baffle 13 moves up and down, which helps to guide the magnetic baffle 13 to rise or fall smoothly. At the same time, it can also increase the friction force between the support structure 17 and the magnetic baffle 13 to a certain extent, preventing the magnetic baffle 13 from having a large displacement due to shaking.

[0075] Exemplarily, the support structure 17 can be configured as an elastic support sheet. The support sheet made of an elastic material has one end fixed to the inner wall of the cylinder body 11 and the other end in contact with the magnetic baffle 13. The elastic support sheet can automatically adjust the support force according to the weight and force conditions of the magnetic baffle 13. When the magnetic baffle 13 is subjected to a large external force, the elastic support sheet can generate a certain deformation to buffer the impact force, protect the structures of the magnetic baffle 13 and the cylinder body 11, and at the same time always maintain the limitation of the lowest position of the magnetic baffle 13.

[0076] Exemplarily, the support structure 17 can be configured as a combined support structure 17, which combines the above-mentioned various support structures 17. For example, some support columns are arranged at intervals on the annular support member, or an elastic support sheet is added on the basis of the spiral support bar, etc. This combined support structure 17 can integrate the advantages of various structures, flexibly adjust the support performance according to actual needs, and better meet the support and limit requirements of the magnetic baffle 13 under different working conditions.

[0077] The embodiment of the present application further provides an air conditioner, including the above-mentioned vapor-liquid separation device 1, which can achieve all the effects of the above-mentioned vapor-liquid separation device 1, and will not be elaborated here.

[0078] The embodiment of the present application also provides a control method, which is applied to the above-mentioned vapor-liquid separation device 1. The control method includes:

[0079] Detect the suction superheat degree of the vapor-liquid separation device 1;

[0080] Determine that the suction superheat degree is greater than a preset temperature value;

[0081] Control the electromagnetic coil 12 to be energized. The electromagnetic coil 12 generates a magnetic force in the energized state, and the magnetic baffle 13 rises in the cylinder body 11 under the action of the magnetic force.

[0082] In this way, the control method is closely combined with the characteristics of the vapor-liquid separation device 1. By monitoring the suction superheat degree and controlling the electromagnetic coil 12, the vapor-liquid separation effect of the device and the operation stability of the system are effectively improved. Combining with the core principle that the vapor-liquid separation device 1 relies on the electromagnetic coil 12 and the magnetic baffle 13 to block the liquid splash from entering the compressor, detecting the suction superheat degree as the starting link of the control can accurately obtain the system operation state information. The suction superheat degree is a key parameter reflecting the evaporation situation of the refrigerant in the evaporator and the system operation condition. When it is determined that the suction superheat degree is greater than the preset temperature value, it means that the system operation state has changed, and situations such as excessive refrigerant evaporation and system load change may occur. At this time, control the electromagnetic coil 12 to be energized to generate magnetic force, which in turn drives the magnetic baffle 13 to raise its installation position in the cylinder body 11. This operation has many positive effects.

[0083] On the one hand, raising the position of the magnetic baffle 13 can reduce the space of the liquid area 111A, reduce the liquid inventory in the cylinder body 11, avoid the risk of increasing the splash into the outlet pipe 14 due to excessive liquid, and effectively reduce the possibility of compressor liquid slugging; on the other hand, with the change of the position of the magnetic baffle 13, the space of the gas area 111B increases, providing more sufficient space for the flow and separation of gas, which helps to improve the gas separation efficiency, make the gaseous refrigerant entering the compressor purer, and ensure the stable operation of the compressor. This control method based on real-time monitoring and feedback of the suction superheat degree can dynamically adapt to various changes in the system operation process, timely adjust the working state of the vapor-liquid separation device 1. Compared with the traditional fixed-structure vapor-liquid separator, it significantly enhances the system's ability to cope with different working conditions, optimizes the overall performance of equipment such as heat pump units, improves the energy utilization efficiency, extends the service life of key components such as compressors at the same time, and reduces the equipment maintenance cost.

[0084] Considering the descending scheme of the magnetic baffle 13, in the control method provided by the embodiment of the present application, when the suction superheat degree is less than the preset temperature value, control the electromagnetic coil 12 to be de-energized, and the magnetic baffle 13 descends in the cylinder body 11.

[0085] In this way, the descending scheme of the magnetic baffle 13 is deeply compatible with the operation mechanism of the vapor-liquid separation device 1. Based on the judgment of the suction superheat degree, control the on-off of the electromagnetic coil 12, so as to realize the position adjustment of the magnetic baffle 13, which has a significant effect on optimizing the performance of the vapor-liquid separation device 1. Combining with the principle that the vapor-liquid separation device 1 relies on the magnetic force of the electromagnetic coil 12 to drive the magnetic baffle 13 to achieve vapor-liquid separation, the suction superheat degree less than the preset temperature value indicates that the refrigerant in the system is not fully evaporated and there is a situation of excessive liquid refrigerant. At this time, the liquid level of the liquid area 111A in the cylinder body 11 may be relatively high. After controlling the electromagnetic coil 12 to be de-energized, the magnetic baffle 13 without the magnetic force drops in the cylinder body 11 under its own gravity. This operation has many positive impacts.

[0086] In a vapor-liquid separator, there is a close relationship between the suction superheat and the proportion of gas and liquid. The judgment principle is based on the thermodynamic properties of the refrigerant and the influence of the gas-liquid state change on temperature. First of all, the suction superheat is the difference between the temperature of the refrigerant gas at the evaporator outlet and the saturation temperature. For pure gas, there is no liquid evaporation to absorb heat and reduce the temperature, so the superheat is relatively high. When there is liquid in the vapor-liquid separator, the liquid evaporation will absorb heat, causing the temperature of the gas in the mixed state to decrease and the superheat to be relatively low. This is because the liquid evaporation requires heat consumption, which will lower the overall temperature and lead to a decrease in superheat. Therefore, by analyzing the suction superheat, it is possible to infer the proportion of gas and liquid in the vapor-liquid separator to a certain extent.

[0087] In actual operation, to judge the gas-liquid ratio through suction superheat, multiple steps are required. First, it is necessary to clarify the characteristics of the refrigerant used and obtain key parameters with the help of its pressure-enthalpy diagram or thermodynamic data table. Then, accurately measure the pressure and temperature of the refrigerant at the suction port of the vapor-liquid separator, find the saturation temperature from relevant materials according to the pressure value, and then calculate the suction superheat. Next, through experiments or referring to the technical data provided by the equipment manufacturer, establish an empirical relationship between the suction superheat and the gas-liquid ratio of the vapor-liquid separator under specific working conditions. However, in actual applications, factors such as the operating conditions of the system, the refrigerant charge, and the evaporator heat load will all affect the relationship between the two, and these factors need to be considered comprehensively to more accurately judge the gas-liquid ratio in the vapor-liquid separator.

[0088] Taking an air-conditioning system with R22 refrigerant as an example: In a typical household air-conditioning system, when the suction superheat of the vapor-liquid separator reaches about 15°C - 20°C, it is usually considered that the gas proportion is relatively large. At this time, most of the refrigerant in the system has evaporated into gas, and the gas proportion may reach about 90% - 95%. This is because a higher superheat indicates that the refrigerant has been fully evaporated in the evaporator and has absorbed a certain amount of heat after leaving the evaporator, making the temperature significantly higher than the saturation temperature, indicating that the vapor-liquid separator is mainly filled with gas at this time.

[0089] When the suction superheat is between 5°C - 10°C: Then the liquid proportion may be relatively large. For example, the liquid proportion may be about 60% - 70% at this time. This is because a lower superheat means that the refrigerant at the evaporator outlet has not been completely evaporated, or the heat absorbed after leaving the evaporator is less. It may be that some liquid enters the vapor-liquid separator together with the gas, and the liquid evaporation absorbs heat to keep the superheat at a relatively low level.

[0090] It should be noted that under different refrigeration systems, different refrigerants, and different operating conditions, the specific corresponding relationship between the suction superheat and the gas-liquid ratio will vary. The above examples are only rough references under common circumstances. In actual applications, the relationship between the two needs to be accurately determined based on the characteristics of the specific system and experimental data.

[0091] Exemplarily, the refrigerant can also be any one of R134a, R600a, R290, R717, or R744.

[0092] First of all, the descent of the magnetic baffle 13 expands the space of the liquid region 111A, providing a more sufficient accommodation space for the liquid refrigerant accumulated in the cylinder 11, and avoiding liquid splashing into the outlet pipe 14 due to too high a liquid level, which may cause liquid slugging in the compressor. Secondly, after the magnetic baffle 13 descends, the space of the gas region 111B relatively shrinks, enabling the gas to be separated more efficiently in a limited space, reducing the residual liquid refrigerant when the gaseous refrigerant is discharged, and further improving the separation effect. Moreover, this solution dynamically adjusts the position of the magnetic baffle 13 by real-time monitoring of the suction superheat, enabling the gas-liquid separation device 1 to flexibly change its working state according to the actual operating conditions of the system, enhancing the adaptability of the device to different working conditions. Compared with the gas-liquid separator with a fixed structure, this intelligent adjustment method effectively reduces the operation risk of the system, improves the stability and reliability of the operation of equipment such as heat pump units, reduces the damage to the compressor caused by liquid slugging, extends the service life of the equipment, and ensures the efficient operation of the entire system.

[0093] In summary, a liftable magnetic baffle 13 is placed in the middle of the cylinder 11 of the gas-liquid separator. The magnetic baffle 13 is made of magnetic material, and a lifting track (a lifting track restricted by the inner wall of the cylinder 11) is arranged inside the cylinder 11. The magnetic baffle 13 and the electromagnetic coil 12 on the gas-liquid separator form an electromagnetic switch. When the electromagnetic coil 12 is energized, a magnetic field will be generated to attract the magnetic baffle 13 to rise. When the electromagnetic coil 12 is de-energized, the magnetic baffle 13 will descend under the action of gravity. The electromagnetic coil 12 is connected to the main board of the air-conditioning system. In order not to let the magnetic baffle 13 affect the flow rate of the refrigerant too much, the magnetic baffle 13 will only descend to play a role when needed, and its on-off will be controlled by the suction superheat of the system (the difference between the actual temperature of the refrigerant before entering the compressor and the saturation temperature at this pressure). By detecting the suction superheat and automatically adjusting the position of the baffle, intelligent control can be achieved, improving the reliability and stability of the system.

[0094] The vapor-liquid separation device 1 is composed of a cylinder body 11, an electromagnetic coil 12, a magnetic baffle 13, etc. The cylinder body 11 provides a separation space. When the electromagnetic coil 12 is energized, it generates a magnetic force to make the magnetic baffle 13 move longitudinally to separate the gas-liquid regions. Its structural design includes a U-shaped gas outlet pipe 14, a magnetic baffle 13 with through holes and slit holes 134, etc., which cooperate with a liquid inlet pipe 16, a support structure 17, etc. to enhance the vapor-liquid separation effect and reduce the risk of liquid slugging in the compressor. There are various material selections to adapt to different working conditions. The control method is based on detecting the suction superheat degree. After comparing it with a preset temperature value, it controls the on-off of the electromagnetic coil 12, drives the magnetic baffle 13 to rise and fall, and dynamically adjusts the space of the gas-liquid regions.

[0095] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0096] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0097] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vapor-liquid separation device, characterized in that, The vapor-liquid separation device (1) includes: A cylinder body (11) for accommodating the vapor-liquid mixture and providing a separation space; An electromagnetic coil (12) installed at the top of the cylinder body (11); A magnetic baffle (13) for dividing the cylinder body (11) into a lower liquid region (111A) and an upper gas region (111B). The magnetic baffle (13) is installed inside the cylinder body (11) and is located below the electromagnetic coil (12); The electromagnetic coil (12) is configured to generate a magnetic force in the energized state, and the magnetic force acts on the magnetic baffle (13) to enable the magnetic baffle (13) to move longitudinally inside the cylinder body (11).

2. The vapor-liquid separation device according to claim 1, wherein The cylinder body (11) includes an internal cavity (111) and an air outlet (112) communicating with the internal cavity (111); it also includes an air outlet pipe (14). One end of the air outlet pipe (14) is hermetically connected to the air outlet (112), and the other end of the air outlet pipe (14) is located above the magnetic baffle (13).

3. The vapor-liquid separation device according to claim 2, characterized in that, The vapor-liquid separation device (1) includes a liquid inlet (15) and a liquid inlet pipe (16). One end of the liquid inlet pipe (16) is hermetically connected to the liquid inlet (15), and the other end of the liquid inlet pipe (16) is used to extend into the internal cavity (111), and the other end of the liquid inlet pipe (16) is located below the magnetic baffle (13).

4. The vapor-liquid separation device according to claim 3, characterized in that, The part of the air outlet pipe (14) extending into the internal cavity (111) is configured as a U-shaped structure.

5. The vapor-liquid separation device according to claim 4, characterized in that, The magnetic baffle (13) is configured as a plate-like structure, and the plate-like structure includes a first through hole (131) for the liquid inlet pipe (16) to pass through.

6. The vapor-liquid separation device according to claim 4, wherein, The magnetic baffle (13) is configured as a plate-like structure, and the plate-like structure includes a second through hole (132) and a third through hole (133) for the two pipe bodies of the U-shaped structure to pass through respectively.

7. The vapor-liquid separation device according to claim 4, characterized in that, The magnetic baffle (13) is configured as a plate-like structure, and the plate-like structure includes a plurality of slotted holes (134) for gas to pass through.

8. The vapor-liquid separation device according to claim 1, characterized in that, The vapor-liquid separation device (1) includes a support structure (17) arranged along the inner wall of the cylinder body (11), and the support structure (17) is used to limit the lowest position of the magnetic baffle (13).

9. An air conditioner, characterized in that, Including the vapor-liquid separation device according to any one of claims 1-8.

10. A control method, applied to the vapor-liquid separation device (1) according to any one of claims 1-8, characterized in that, The control method includes: Detecting the suction superheat degree of the vapor-liquid separation device (1); Determining that the suction superheat degree is greater than a preset temperature value; Controlling the electromagnetic coil (12) to be energized. The electromagnetic coil (12) generates a magnetic force in the energized state, and the magnetic baffle (13) rises inside the cylinder body (11) under the action of the magnetic force.

11. The control method according to claim 10, wherein, When the suction superheat degree is less than the preset temperature value, controlling the electromagnetic coil (12) to be de-energized, and the magnetic baffle (13) descends inside the cylinder body (11).

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