Gas-liquid separation device

Abstract

The present application relates to a gas-liquid separation device, which is provided with an inlet, a diverter chamber, a first gas-liquid separation channel and a second gas-liquid separation channel. The diverter chamber is provided with a bottom wall, a first side wall and a second side wall. The first side wall and the second side wall are arranged at a conical angle to enclose a diverter chamber with a conical cross-section; the end of the first side wall away from the second side wall is connected to the first gas-liquid separation channel, and the end of the second side wall away from the first side wall is connected to the second gas-liquid separation channel. The inlet direction of the inlet is perpendicular to the bottom wall of the diverter chamber. The refrigerant can enter the diverter chamber through the inlet, and the refrigerant in the diverter chamber can enter the first gas-liquid separation channel along the first side wall, and enter the second gas-liquid separation channel along the second side wall. The gas-liquid separation device provided by the present application solves the problem that the existing gas-liquid mixed refrigerant has a short residence time in the U-tube, resulting in incomplete gas-liquid separation of the refrigerant.

Description

Technical Field

[0001] The present application relates to the technical field of gas-liquid separation of refrigerant media, and in particular to a gas-liquid separation device. Background Art

[0002] In new energy vehicle air conditioning systems, a gas-liquid separator is typically located between the evaporator and the compressor. This means that the refrigerant enters the gas-liquid separator from the evaporator before entering the compressor. A key function of the gas-liquid separator is to separate the gas and liquid refrigerant flowing from the evaporator, minimizing the chance of liquid refrigerant being drawn into the compressor and preventing liquid hammering.

[0003] Therefore, the gas-liquid separation device needs to separate the liquid refrigerant from the gas-liquid two-phase refrigerant as much as possible. In order to achieve the above purpose, the existing gas-liquid separation device usually designs a U-shaped tube to realize the gas-liquid separation of the refrigerant. However, the residence time of the gas-liquid mixed refrigerant in the U-shaped tube is relatively short, which leads to incomplete gas-liquid separation of the refrigerant, thereby reducing the effect of gas-liquid separation of the refrigerant. Summary of the Invention

[0004] Based on this, it is necessary to provide a gas-liquid separation device to solve the problem that the existing gas-liquid mixed refrigerant has a short residence time in the U-shaped tube, resulting in incomplete separation of the refrigerant gas and liquid.

[0005] The gas-liquid separation device provided in the present application is provided with an inlet, a diverter chamber, a first gas-liquid separation channel and a second gas-liquid separation channel. The diverter chamber is provided with a bottom wall, a first side wall and a second side wall. The first side wall and the second side wall are arranged at a conical angle to enclose a diverter chamber with a conical cross-section; the end of the first side wall away from the second side wall is connected to the first gas-liquid separation channel, and the end of the second side wall away from the first side wall is connected to the second gas-liquid separation channel. The inlet direction of the inlet is perpendicular to the bottom wall of the diverter chamber. The refrigerant can enter the diverter chamber through the inlet, and the refrigerant in the diverter chamber can enter the first gas-liquid separation channel along the first side wall, and enter the second gas-liquid separation channel along the second side wall.

[0006] In one embodiment, the angle between the first side wall and the second side wall is greater than or equal to 45° and less than or equal to 135°. It is understood that the angle between the first side wall and the second side wall is greater than or equal to 45°, which is conducive to expanding the volume of the diversion cavity, so that the diversion cavity can accommodate more gas-liquid two-phase refrigerant. The angle between the first side wall and the second side wall is less than or equal to 135°, which can prevent the angle between the first side wall and the second side wall from being too large and affecting the refrigerant from entering the first gas-liquid separation channel and the second gas-liquid separation channel.

[0007] In one embodiment, a curved transition section is provided between the first and second side walls, and a portion of the outer contour of the orthographic projection of the inlet onto the bottom wall of the diverter cavity coincides with the curved transition section. It will be appreciated that this arrangement allows the refrigerant to smoothly enter the first and second side walls along the curved transition section, thereby preventing turbulence in the gas-liquid two-phase refrigerant within the diverter cavity and thereby improving the diversion efficiency of the gas-liquid separation device.

[0008] In one embodiment, the gas-liquid separation device includes an outer shell, a partition, an inlet pipe and an outlet pipe. The outer shell is provided with a accommodating chamber and an inlet and an outlet respectively connected to the accommodating chamber. The inlet pipe is inserted into the inlet and connected to the inlet. One end of the outlet pipe is inserted into the accommodating chamber, and the other end extends out of the accommodating chamber and is inserted into the outlet. One end of the partition is directly or indirectly connected to the outer wall of the outlet pipe, and the other end extends toward the direction close to the side wall of the accommodating chamber to separate the accommodating chamber into a first chamber and a second chamber, and the partition is provided with a connecting port connecting the first chamber and the second chamber.

[0009] In one embodiment, the housing includes a cylindrical body and a sealing cover, the sealing cover being sealed at the opening of the cylindrical body, and the inlet and outlet being provided on the sealing cover. It is understood that such a configuration greatly simplifies the difficulty of connecting the inlet pipe to the housing, as well as the difficulty of connecting the outlet pipe to the housing.

[0010] In one embodiment, a liquid outlet gap is provided between the partition and the inner wall of the accommodating cavity, connecting the first cavity and the second cavity. It is understood that, with such a configuration, liquid refrigerant can enter the second cavity from the first cavity through the liquid outlet gap.

[0011] In one embodiment, one or more reflux structures are provided in one or both of the first gas-liquid separation channel and the second gas-liquid separation channel, and the reflux structure includes a first reflux plate and a second reflux plate sequentially distributed along a first direction, wherein the first direction is the extension direction of the first gas-liquid separation channel or the first direction is the extension direction of the second gas-liquid separation channel, the first reflux plate is provided with a first through-flow hole and a first reflux surface, the second reflux plate is provided with a second through-flow hole and a second reflux surface, the first through-flow hole and the second reflux surface are correspondingly distributed along the first direction, and the second through-flow hole and the first reflux surface are correspondingly distributed along the first direction, the second reflux surface can reflux the refrigerant entering through the first through-flow hole to the first reflux surface, and the first reflux surface can reflux the refrigerant refluxed from the second reflux surface to the second through-flow hole. It can be understood that such a setting significantly improves the gas-liquid separation effect of the gas-liquid separation device and reduces the volume of the gas-liquid separation device.

[0012] In one embodiment, the return structure also includes a third return plate, the first return plate, the second return plate and the third return plate are distributed in sequence along the first direction, the third return plate is provided with a third through-hole and a third return surface, the second return plate is provided with a back return surface at one end away from the second return surface, the third through-hole and the back return surface are distributed correspondingly along the first direction, and the third return surface and the second through-hole are distributed correspondingly along the first direction, the third return surface can return the refrigerant entering through the second through-hole to the back return surface, and the back return surface can return the refrigerant returning from the third return surface to the third through-hole.

[0013] In one embodiment, a first guide plate extending toward the second return surface is provided at the edge of the first through hole, so as to facilitate the refrigerant to flow toward the second return surface through the first guide plate.

[0014] In one embodiment, a second guide plate extending toward the third return surface is provided at the edge of the second through hole, so as to facilitate the refrigerant to flow toward the third return surface through the second guide plate.

[0015] In one embodiment, a third guide plate extending toward the back-flow surface is provided at the edge of the third through-hole, so as to facilitate the refrigerant to flow toward the back-flow surface through the third guide plate.

[0016] In one embodiment, a vertically arranged first liquid baffle is provided at the bottom of the first flow hole, which is conducive to increasing the contact time between the liquid refrigerant and the first liquid baffle, thereby improving the separation effect of the liquid refrigerant.

[0017] In one embodiment, a second liquid baffle is vertically provided at the bottom of the second flow hole, which is conducive to increasing the contact time between the liquid refrigerant and the second liquid baffle, thereby improving the separation effect of the liquid refrigerant.

[0018] In one embodiment, a third liquid baffle is vertically disposed at the bottom of the third flow hole, which is conducive to increasing the contact time between the liquid refrigerant and the third liquid baffle, thereby improving the separation effect of the liquid refrigerant.

[0019] Compared with the prior art, the gas-liquid separation device provided in the present application sets up a diversion chamber. Since the flow direction of the inlet is perpendicular to the bottom wall of the diversion chamber, the gas-liquid two-phase refrigerant vertically impacts the bottom wall of the diversion chamber from the inlet, and then the refrigerant diffuses to the surrounding areas of the diversion chamber. Since the first side wall and the second side wall are set at a conical angle to enclose a diversion chamber with a conical cross-section, the refrigerant will fully contact the bottom wall, the first side wall and the second side wall of the diversion chamber during the diffusion process in the diversion chamber, so that the liquid refrigerant condenses on the bottom wall, the first side wall and the second side wall of the diversion chamber. Because the end of the first sidewall away from the second sidewall is connected to the first gas-liquid separation channel, and the end of the second sidewall away from the first sidewall is connected to the second gas-liquid separation channel, when the gas-liquid two-phase refrigerant fills the entire diverter cavity, driven by the gas pressure difference, the gas-liquid two-phase refrigerant can enter the first gas-liquid separation channel along the first sidewall and enter the second gas-liquid separation channel along the second sidewall. This further enhances the condensation effect of the liquid refrigerant on the first and second sidewalls, thereby improving the gas-liquid separation effect of the refrigerant. In addition, the first and second sidewalls have a certain guiding effect on the refrigerant, preventing the refrigerant from generating turbulent flow within the diverter cavity. That is, this arrangement improves the separation efficiency of the gas-liquid separation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of a gas-liquid separation device according to an embodiment of the present application;

[0022] Figure 2 A cross-sectional view of a gas-liquid separation device according to an embodiment of the present application;

[0023] Figure 3 This is an exploded view of a gas-liquid separation device according to an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of the partial structure of a gas-liquid separation device according to an embodiment of the present application.

[0025] Reference numerals: 110, first gas-liquid separation channel; 120, second gas-liquid separation channel; 200, reflux structure; 210, first reflux plate; 211, first through-hole; 212, first reflux surface; 220, second reflux plate; 221, second through-hole; 222, second reflux surface; 223, back reflux surface; 230, third reflux plate; 231, third through-hole; 232, third reflux surface; 240, first guide plate; 250, second guide plate; 260, first liquid blocking plate Plate; 270, second liquid baffle plate; 280, third liquid baffle plate; 290, third guide plate; 300, outer shell; 310, accommodating chamber; 311, first chamber; 312, second chamber; 313, inlet; 314, liquid outlet gap; 315, air outlet; 320, cylinder; 330, sealing cover; 400, partition; 500, connecting port; 600, air outlet pipe; 700, diversion chamber; 710, bottom wall; 720, first side wall; 730, second side wall; 740, arc-shaped transition section. DETAILED DESCRIPTION

[0026] 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 device or element referred to 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0029] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] In new energy vehicle air conditioning systems, a gas-liquid separator is typically located between the evaporator and the compressor. This means that the refrigerant enters the gas-liquid separator from the evaporator before entering the compressor. A key function of the gas-liquid separator is to separate the gas and liquid refrigerant flowing from the evaporator, minimizing the chance of liquid refrigerant being drawn into the compressor and preventing liquid hammering.

[0033] Therefore, the gas-liquid separation device needs to separate the liquid refrigerant from the gas-liquid two-phase refrigerant as much as possible. In order to achieve the above purpose, the existing gas-liquid separation device usually designs a U-shaped tube to realize the gas-liquid separation of the refrigerant. However, the residence time of the gas-liquid mixed refrigerant in the U-shaped tube is relatively short, which leads to incomplete gas-liquid separation of the refrigerant, thereby reducing the effect of gas-liquid separation of the refrigerant.

[0034] See also Figure 1-Figure 4To address the problem of incomplete gas-liquid separation caused by the short residence time of existing gas-liquid mixed refrigerant in a U-shaped tube, the present application provides a gas-liquid separation device. The gas-liquid separation device comprises an inlet 313, a diverter cavity 700, a first gas-liquid separation channel 110, and a second gas-liquid separation channel 120. The diverter cavity 700 comprises a bottom wall 710, a first side wall 720, and a second side wall 730. The first side wall 720 and the second side wall 730 are arranged at a tapered angle to enclose the diverter cavity 700, which has a tapered cross-section. One end of the first side wall 720 away from the second side wall 730 is connected to the first gas-liquid separation channel 110, and one end of the second side wall 730 away from the first side wall 720 is connected to the second gas-liquid separation channel 120. The inlet direction of the inlet 313 is perpendicular to the bottom wall 710 of the diversion cavity 700. The refrigerant can enter the diversion cavity 700 through the inlet 313, and the refrigerant in the diversion cavity 700 can enter the first gas-liquid separation channel 110 along the first side wall 720, and enter the second gas-liquid separation channel 120 along the second side wall 730.

[0035] It should be noted that the conical angle setting refers to the first side wall 720 and the second side wall 730 being arranged to form a conical angle, which is greater than 0° and less than 180°.

[0036] Furthermore, it should be noted that the inflow direction refers to the flow direction of the gas-liquid two-phase refrigerant.

[0037] By setting up the diversion chamber 700, since the inlet direction of the inlet 313 is perpendicular to the bottom wall 710 of the diversion chamber 700, the gas-liquid two-phase refrigerant vertically impacts the bottom wall 710 of the diversion chamber 700 from the inlet 313, and then the refrigerant diffuses to the surrounding areas of the diversion chamber 700. Since the first side wall 720 and the second side wall 730 are set at a conical angle to enclose the diversion chamber 700 with a conical cross-section, the refrigerant will fully contact the bottom wall 710, the first side wall 720 and the second side wall 730 of the diversion chamber 700 during the process of diffusing in the diversion chamber 700, so that the liquid refrigerant condenses on the bottom wall 710, the first side wall 720 and the second side wall 730 of the diversion chamber 700. Because the end of the first side wall 720 away from the second side wall 730 is connected to the first gas-liquid separation channel 110, and the end of the second side wall 730 away from the first side wall 720 is connected to the second gas-liquid separation channel 120, when the gas-liquid two-phase refrigerant fills the entire diverter chamber 700, driven by the air pressure difference, the gas-liquid two-phase refrigerant can enter the first gas-liquid separation channel 110 along the first side wall 720 and enter the second gas-liquid separation channel 120 along the second side wall 730. This further enhances the condensation effect of the liquid refrigerant on the first side wall 720 and the second side wall 730, thereby improving the gas-liquid separation effect of the refrigerant. In addition, the first side wall 720 and the second side wall 730 have a certain guiding effect on the refrigerant, preventing the refrigerant from generating turbulent flow within the diverter chamber 700. In other words, this arrangement improves the separation efficiency of the gas-liquid separation device.

[0038] Furthermore, in one embodiment, the angle between the first side wall 720 and the second side wall 730 is greater than or equal to 45° and less than or equal to 135°.

[0039] In this way, the angle between the first side wall 720 and the second side wall 730 is greater than or equal to 45°, which is conducive to expanding the volume of the diversion chamber 700, so that the diversion chamber 700 can accommodate more gas-liquid two-phase refrigerant. The angle between the first side wall 720 and the second side wall 730 is less than or equal to 135°, which can avoid the angle between the first side wall 720 and the second side wall 730 being too large and affecting the refrigerant entering the first gas-liquid separation channel 110 and the second gas-liquid separation channel 120.

[0040] Preferably, the angle between the first side wall 720 and the second side wall 730 is 90°.

[0041] In one embodiment, if Figure 4 As shown, an arcuate transition section 740 is provided between the first side wall 720 and the second side wall 730 , and a portion of the outer contour of the inlet 313 projected onto the bottom wall 710 of the diversion cavity 700 coincides with the arcuate transition section 740 .

[0042] In this way, the refrigerant can smoothly enter the first side wall 720 and the second side wall 730 along the arc transition section 740, avoiding turbulence of the gas-liquid two-phase refrigerant in the diversion cavity 700, thereby improving the diversion efficiency of the gas-liquid separation device.

[0043] In one embodiment, if Figure 3 and Figure 4 As shown, one or more reflux structures 200 are provided in one or both of the first gas-liquid separation channel 110 and the second gas-liquid separation channel 120, and the reflux structure 200 includes a first reflux plate 210 and a second reflux plate 220 distributed in sequence along a first direction, wherein the first direction is the extension direction of the first gas-liquid separation channel 110 or the extension direction of the second gas-liquid separation channel 120, the first reflux plate 210 is provided with a first through-flow hole 211 and a first reflux surface 212, the second reflux plate 220 is provided with a second through-flow hole 221 and a second reflux surface 222, the first through-flow hole 211 and the second reflux surface 222 are correspondingly distributed along the first direction, and the second through-flow hole 221 and the first reflux surface 212 are correspondingly distributed along the first direction, the second reflux surface 222 can reflux the refrigerant entering through the first through-flow hole 211 to the first reflux surface 212, and the first reflux surface 212 can reflux the refrigerant refluxed from the second reflux surface 222 to the second through-flow hole 221.

[0044] It should be noted that the first direction is not a fixed direction. When the reflux structure 200 is located in the first gas-liquid separation channel 110, the first direction is the extension direction of the first gas-liquid separation channel 110. When the reflux structure 200 is located in the second gas-liquid separation channel 120, the first direction is the extension direction of the second gas-liquid separation channel 120. Furthermore, the first direction can be a direction along a straight line, a direction along a curve, or a specific direction extending along an arbitrary shape, and these are not specifically limited here.

[0045] Furthermore, it should be noted that, in this embodiment, the first side wall 720 and the second side wall 730 are side walls of different first reflow plates 210 .

[0046] Since one or more reflux structures 200 are provided in the gas-liquid separation channel, the refrigerant will pass through the one or more reflux structures 200 when flowing in the gas-liquid separation channel.

[0047] Furthermore, the reflux structure 200 includes a first reflux plate 210 and a second reflux plate 220 sequentially distributed along a first direction. The first reflux plate 210 is provided with a first through-hole 211 and a first reflux surface 212. Correspondingly, the second reflux plate 220 is provided with a second through-hole 221 and a second reflux surface 222. It should be noted that the first through-hole 211 and the second reflux surface 222 are correspondingly distributed along the first direction, and the second through-hole 221 and the first reflux surface 212 are correspondingly distributed along the first direction. The second reflux surface 222 can return the refrigerant entering through the first through-hole 211 to the second reflux surface 222, and the second reflux surface 222 can return the refrigerant returning from the first reflux surface 212 to the second through-hole 221.

[0048] In this way, when the refrigerant passes through the second return surface 222 of the second return plate 220 from the first flow hole 211 of the first return plate 210 along the first direction, the second return surface 222 returns the refrigerant to the first return surface 212 of the first return plate 210, and then the first return surface 212 returns the refrigerant to the second flow hole 221 of the second return plate 220, and finally, the refrigerant leaves the return structure 200 from the second flow hole 221. Through the multiple reflux effects of the first reflux plate 210 and the second reflux plate 220, the contact area and contact time of the gas-liquid two-phase refrigerant with the first reflux plate 210 and the second reflux plate 220 are significantly improved, that is, the residence time of the refrigerant in the gas-liquid separation channel is significantly increased, and the contact area between the refrigerant and the gas-liquid separation device is significantly increased, which is conducive to the adsorption of liquid refrigerant on the first reflux plate 210, the second reflux plate 220 and the inner wall of the gas-liquid separation channel, thereby significantly improving the gas-liquid separation effect of the gas-liquid separation device.

[0049] Furthermore, compared to existing U-tube designs, which require a longer U-tube to achieve better gas-liquid separation, the present invention achieves better gas-liquid separation by disposing one or more reflux structures 200 within the gas-liquid separation channel, eliminating the need to lengthen the gas-liquid separation channel. Therefore, the gas-liquid separation device provided by the present invention is smaller in size and easier to install.

[0050] Furthermore, in one embodiment, Figure 4As shown, the return structure 200 also includes a third return plate 230, the first return plate 210, the second return plate 220 and the third return plate 230 are distributed in sequence along the first direction, the third return plate 230 is provided with a third through-flow hole 231 and a third return surface 232, the second return plate 220 is provided with a back return surface 223 at one end away from the second return surface 222, the third through-flow hole 231 and the back return surface 223 are correspondingly distributed along the first direction, and the third return surface 232 and the second through-flow hole 221 are correspondingly distributed along the first direction, the third return surface 232 can return the refrigerant entering through the second through-flow hole 221 to the back return surface 223, and the back return surface 223 can return the refrigerant returning from the third return surface 232 to the third through-flow hole 231.

[0051] In this way, when the refrigerant passes through the third return surface 232 of the third return plate 230 from the second flow hole 221 of the second return plate 220 along the first direction, the third return surface 232 can return the refrigerant to the back return surface 223 of the second return plate 220, and then the back return surface 223 returns the refrigerant to the third flow hole 231 of the third return plate 230. Finally, the refrigerant leaves the return structure 200 from the third flow hole 231. Through the multiple reflux effects of the first reflux plate 210, the second reflux plate 220 and the third reflux plate 230, the contact area and contact time of the gas-liquid two-phase refrigerant with the first reflux plate 210, the second reflux plate 220 and the third reflux plate 230 are significantly improved, that is, the residence time of the refrigerant in the gas-liquid separation channel is significantly increased, and the contact area between the refrigerant and the gas-liquid separation device is significantly increased, which is conducive to the adsorption of liquid refrigerant on the first reflux plate 210, the second reflux plate 220, the third reflux plate 230 and the inner wall of the gas-liquid separation channel, thereby significantly improving the gas-liquid separation effect of the gas-liquid separation device.

[0052] In one embodiment, if Figure 4 As shown, a first guide plate 240 extending toward the second return surface 222 is provided at the edge of the first through-hole 211 .

[0053] This is conducive to the refrigerant flowing to the second return surface 222 through the first guide plate 240 .

[0054] Likewise, in one embodiment, if Figure 4 As shown, a second guide plate 250 extending toward the third return surface 232 is provided at the edge of the second through-flow hole 221 .

[0055] This is conducive to the refrigerant flowing to the third return surface 232 through the second guide plate 250 .

[0056] Furthermore, in one embodiment, if Figure 4As shown, the second guide plate 250 extends from one end of the third return plate 230 toward the direction close to the first return surface 212 .

[0057] In this way, the refrigerant is facilitated to enter the second flow hole 221 from the first return surface 212 through the second guide plate 250 , thereby further enhancing the guide effect of the second guide plate 250 .

[0058] Likewise, in one embodiment, if Figure 4 As shown, the edge of the third through-flow hole 231 is provided with a third guide plate 290 extending toward the backflow surface 223 .

[0059] This is beneficial for the refrigerant to flow toward the back-flow surface 223 through the third guide plate 290 .

[0060] In one embodiment, if Figure 4 As shown, a vertically arranged first liquid baffle 260 is provided at the bottom of the first through-hole 211 .

[0061] Usually, in the gas-liquid two-phase refrigerant, the liquid refrigerant is usually concentrated at the bottom of the refrigerant due to its higher density. Therefore, by setting a vertically arranged first liquid baffle 260 at the bottom of the first flow hole 211, it is beneficial to increase the contact time between the liquid refrigerant and the first liquid baffle 260, thereby helping to improve the separation effect of the liquid refrigerant.

[0062] In one embodiment, if Figure 4 As shown, a vertically arranged second liquid baffle 270 is provided at the bottom of the second through-hole 221 .

[0063] By providing a vertically arranged second liquid baffle plate 270 at the bottom of the second flow hole 221 , the contact time between the liquid refrigerant and the second liquid baffle plate 270 is increased, thereby improving the separation effect of the liquid refrigerant.

[0064] Likewise, in one embodiment, if Figure 4 As shown, a vertically arranged third liquid baffle 280 is provided at the bottom of the third through-hole 231 .

[0065] By providing a vertically arranged third liquid baffle plate 280 at the bottom of the third flow hole 231 , the contact time between the liquid refrigerant and the third liquid baffle plate 280 is increased, thereby improving the separation effect of the liquid refrigerant.

[0066] In one embodiment, if Figure 2 and Figure 3As shown, the gas-liquid separation device includes a shell 300, a partition 400, an inlet pipe (not shown) and an outlet pipe 600. The shell 300 is provided with a accommodating chamber 310 and an inlet 313 and an outlet 315 respectively connected to the accommodating chamber 310. The inlet pipe is inserted into the inlet 313 and connected to the inlet 313. One end of the outlet pipe 600 is inserted into the accommodating chamber 310, and the other end extends out of the accommodating chamber 310 and is inserted into the outlet 315. One end of the partition 400 is directly or indirectly connected to the outer wall of the outlet pipe 600, and the other end extends toward the direction close to the side wall of the accommodating chamber 310 to separate the accommodating chamber 310 into a first chamber 311 and a second chamber 312. In addition, the partition 400 is provided with a connecting port 500 connecting the first chamber 311 and the second chamber 312.

[0067] It should be noted that the reflux structure 200 is disposed in the first cavity 311 .

[0068] In this way, the gas-liquid two-phase refrigerant enters the gas-liquid separation channel from the inlet pipe through the inlet port 313. After that, the refrigerant undergoes gas-liquid separation under the action of the reflux structure 200. Then, the refrigerant enters the second cavity 312 through the connecting port 500. Moreover, the liquid refrigerant is deposited at the bottom of the second cavity 312, and the gaseous refrigerant leaves the second cavity 312 through the outlet pipe 600, thereby realizing the gas-liquid separation of the gas-liquid two-phase refrigerant.

[0069] Furthermore, if Figure 3 As shown, the shell 300 includes a cylinder 320 and a sealing cover 330 . The sealing cover 330 is sealed at the opening of the cylinder 320 . The inlet 313 and the air outlet 315 are provided in the sealing cover 330 . The reflux structure 200 and the partition 400 are both provided in the cylinder 320 .

[0070] The inlet 313 and the outlet 315 are provided on the sealing cover 330 , which greatly reduces the difficulty of connecting the inlet pipe and the housing 300 , and reduces the difficulty of connecting the outlet pipe 600 and the housing 300 .

[0071] In one embodiment, if Figure 3 As shown, a liquid outlet gap 314 is provided between the partition 400 and the inner wall of the accommodating chamber 310 , communicating with the first chamber 311 and the second chamber 312 .

[0072] In this way, the liquid refrigerant can flow from the first chamber 311 into the second chamber 312 through the liquid outlet gap 314 .

[0073] Furthermore, in one embodiment, the end surface of the partition 400 close to the first cavity 311 is tilted from an end away from the liquid outlet gap 314 to an end close to the liquid outlet gap 314 toward a direction away from the first cavity 311 .

[0074] In this way, the liquid refrigerant gathered on the end surface of the partition 400 close to the first cavity 311 is facilitated to flow into the liquid outlet gap 314 and enter the second cavity 312 from the first cavity 311 through the liquid outlet gap 314 .

[0075] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A gas-liquid separation device, characterized in that: The invention is provided with an inlet (313), a diversion cavity (700), a first gas-liquid separation channel (110) and a second gas-liquid separation channel (120); the diversion cavity (700) is provided with a bottom wall (710), a first side wall (720) and a second side wall (730); the first side wall (720) and the second side wall (730) are arranged at a conical angle to enclose the diversion cavity (700) with a conical cross section; an end of the first side wall (720) away from the second side wall (730) is connected to the first gas-liquid separation channel (110); the One end of the second side wall (730) away from the first side wall (720) is connected to the second gas-liquid separation channel (120); the inlet direction of the inlet (313) is perpendicular to the bottom wall (710) of the diverter cavity (700); the refrigerant can enter the diverter cavity (700) through the inlet (313); and the refrigerant in the diverter cavity (700) can enter the first gas-liquid separation channel (110) along the first side wall (720), and enter the second gas-liquid separation channel (120) along the second side wall (730); One or more reflux structures (200) are provided in one or both of the first gas-liquid separation channel (110) and the second gas-liquid separation channel (120), and the reflux structure (200) includes a first reflux plate (210) and a second reflux plate (220) sequentially distributed along a first direction, wherein the first direction is the extension direction of the first gas-liquid separation channel (110) or the first direction is the extension direction of the second gas-liquid separation channel (120), the first reflux plate (210) is provided with a first through-flow hole (211) and a first reflux surface (212), and the second reflux plate (220) is provided with a first through-flow hole (211) and a first reflux surface (212). The plate (220) is provided with a second through-flow hole (221) and a second return surface (222), the first through-flow hole (211) and the second return surface (222) are correspondingly distributed along a first direction, and the second through-flow hole (221) and the first return surface (212) are correspondingly distributed along the first direction, the second return surface (222) can return the refrigerant entering through the first through-flow hole (211) to the first return surface (212), and the first return surface (212) can return the refrigerant returned from the second return surface (222) to the second through-flow hole (221); A first guide plate (240) extending toward the second return surface (222) is provided at the edge of the first through-flow hole (211); a first liquid baffle (260) vertically arranged is provided at the bottom of the first through-flow hole (211); and a second liquid baffle (270) vertically arranged is provided at the bottom of the second through-flow hole (221).

2. The gas-liquid separation device according to claim 1, characterized in that: The angle between the first side wall (720) and the second side wall (730) is greater than or equal to 45° and less than or equal to 135°.

3. The gas-liquid separation device according to claim 1, characterized in that: An arc-shaped transition section (740) is provided between the first side wall (720) and the second side wall (730), and a portion of the outer contour of the positive projection of the inlet (313) on the bottom wall (710) of the diversion cavity (700) coincides with the arc-shaped transition section (740).

4. The gas-liquid separation device according to claim 1, characterized in that: The gas-liquid separation device comprises a housing (300), a partition (400), an inlet pipe, and an outlet pipe (600). The housing (300) is provided with a receiving chamber (310) and an inlet port (313) and an outlet port (315) respectively connected to the receiving chamber (310). The inlet pipe is inserted into the inlet port (313) and connected to the inlet port (313). One end of the outlet pipe (600) is inserted into the receiving chamber (310), and the other end extends out of the receiving chamber (310). The accommodating chamber (310) is inserted into the air outlet (315), one end of the partition (400) is directly or indirectly connected to the outer wall of the air outlet pipe (600), and the other end extends toward the direction close to the side wall of the accommodating chamber (310) to separate the accommodating chamber (310) into a first chamber (311) and a second chamber (312), and the partition (400) is provided with a communication port (500) connecting the first chamber (311) and the second chamber (312).

5. The gas-liquid separation device according to claim 4, characterized in that: The housing (300) comprises a cylinder (320) and a sealing cover (330), wherein the sealing cover (330) is sealingly arranged at the opening of the cylinder (320), and the inlet (313) and the air outlet (315) are arranged on the sealing cover (330).

6. The gas-liquid separation device according to claim 4, characterized in that: A liquid outlet gap (314) communicating with the first cavity (311) and the second cavity (312) is provided between the partition (400) and the inner wall of the accommodating cavity (310).

7. The gas-liquid separation device according to claim 1, characterized in that: The reflux structure (200) further comprises a third reflux plate (230), wherein the first reflux plate (210), the second reflux plate (220) and the third reflux plate (230) are sequentially distributed along a first direction, the third reflux plate (230) is provided with a third through-flow hole (231) and a third reflux surface (232), an end of the second reflux plate (220) facing away from the second reflux surface (222) is provided with a back-facing reflux surface (223), and the third through-flow hole (231) and a third reflux surface (232) are provided. 1) and the back return surface (223) are correspondingly distributed along the first direction, and the third return surface (232) and the second through-flow hole (221) are correspondingly distributed along the first direction, the third return surface (232) is capable of returning the refrigerant entering through the second through-flow hole (221) to the back return surface (223), and the back return surface (223) is capable of returning the refrigerant returning from the third return surface (232) to the third through-flow hole (231).

8. The gas-liquid separation device according to claim 7, characterized in that: A second guide plate (250) extending toward the third return surface (232) is provided at the edge of the second through-flow hole (221); And / or, a third guide plate (290) extending toward the back-flow surface (223) is provided at the edge of the third through-flow hole (231).

9. The gas-liquid separation device according to claim 7, characterized in that: A vertically arranged third liquid baffle (280) is provided at the bottom of the third through-flow hole (231).

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