Gas guide member and gas-liquid separator

Abstract

A gas guide member (10) and a gas-liquid separator (100). The gas guide member (10) is mounted in a cavity of the gas-liquid separator (100); the gas-liquid separator (100) is provided with a gas outlet (30) which is in communication with the cavity (20); the gas guide member (10) has a gas-liquid separation channel (11); the gas-liquid separation channel (11) has an inlet (111) which is in communication with the cavity (20), and an outlet (112) which is located above the inlet (111) in a first preset direction X and is configured to communicate with the gas outlet (30); and in the direction from the inlet (111) to the outlet (112), the gas-liquid separation channel (11) extends, in a manner of reversing direction back and forth, between two opposite ends of the gas guide member (10) in a second preset direction Y, the first preset direction X and the second preset direction Y being perpendicular to each other.

Description

Air guide and gas-liquid separator

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202422007075.4, filed on August 16, 2024, and entitled “Air guide and gas-liquid separator”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of gas-liquid separation equipment, and in particular to an air guide and a gas-liquid separator. BACKGROUND

[0004] The gas-liquid separator is generally used in a refrigeration system and is installed between an evaporator and a compressor for separating gaseous and liquid refrigerants. The gas-liquid separator is provided with a closed cavity, an inlet pipe and an outlet pipe, which are respectively communicated with the closed cavity. An air guide is arranged in the closed cavity and connected to the inlet pipe, which is mainly used to separate the outlet pipe and the inlet pipe to prevent air leakage between the outlet pipe and the inlet pipe. After the gas-liquid mixed refrigerant enters the closed cavity from the inlet pipe, the liquid refrigerant sinks to the bottom of the closed cavity under the action of gravity, and the gaseous refrigerant floats up and is discharged from the closed cavity through the air guide and the outlet pipe. Thus, the gas-liquid separation is only achieved by the difference in density between the gaseous refrigerant and the liquid refrigerant, which results in poor gas-liquid separation effect of the gas-liquid separator. SUMMARY

[0005] According to various embodiments of the present application, an air guide and a gas-liquid separator are provided.

[0006] An air guide is arranged in a cavity of a gas-liquid separator. The gas-liquid separator is provided with an outlet communicated with the cavity. The air guide is internally formed with a gas-liquid separation channel. The gas-liquid separation channel has an inlet and an outlet. The inlet is communicated with the cavity. The outlet is located above the inlet along a first preset direction X and is used to communicate with the outlet. Along a direction from the inlet to the outlet, the gas-liquid separation channel reciprocally turns back between two end portions of the air guide along a second preset direction Y. The first preset direction X and the second preset direction Y are perpendicular to each other.

[0007] In one of the embodiments, along the direction from the inlet to the outlet, the gas-liquid separation channel extends in an S shape.

[0008] In one of the embodiments, the air guide comprises a first box body and a second box body. The second box body is arranged in the interior of the first box body. At least part of the wall surface of the second box body is spaced apart from at least part of the wall surface of the first box body to form the gas-liquid separation channel.

[0009] In one of the embodiments, the first box body comprises a first bottom plate and three first side plates, along the circumference of the first bottom plate, the first bottom plate comprises a first edge, a second edge, a third edge and a fourth edge, the three first side plates are connected to the first edge, the second edge and the third edge of the first bottom plate respectively, and a first opening is formed around the fourth edge of the first bottom plate, and the three first side plates form a second opening away from the first bottom plate; the second box body is arranged inside the first box body through the first opening, and the second opening is used for communicating with the gas outlet.

[0010] In one of the embodiments, the second box body comprises a second bottom plate and three second side plates, along the circumference of the second bottom plate, the second bottom plate comprises a fifth edge, a sixth edge, a seventh edge and an eighth edge, the three second side plates are connected to the fifth edge, the sixth edge and the seventh edge of the second bottom plate respectively, and a third opening is formed around the eighth edge of the second bottom plate, and the three second side plates form a fourth opening away from the second bottom plate; wherein the first opening and the third opening are away from each other, and at least part of the first opening constitutes an inlet, the second opening and the fourth opening are arranged correspondingly and communicated to form an outlet, and the second bottom plate and the second side plates separate the inside of the first box body to form a gas-liquid separation channel.

[0011] In one of the embodiments, the second bottom plate is arranged in parallel with the first bottom plate, and the second side plate is arranged in parallel with the corresponding first side plate, so that in the inside of the first box body, the two sides of the second bottom plate along the first preset direction X form a first branch and a second branch in parallel with each other respectively; and the second bottom plate is arranged away from the second side plate facing the third opening, and a communication opening is formed around the second bottom plate and the second side plate, the communication opening communicates the first branch and the second branch to form the gas-liquid separation channel.

[0012] In one of the embodiments, along the first preset direction X, the fourth opening is aligned with the second opening, the fourth opening constitutes the outlet, and the second bottom plate, the first bottom plate and part of the first side plate form an inlet around them.

[0013] In one of the embodiments, the first bottom plate and the three first side plates are an integral bending and forming structure, and a first gap is formed between the two adjacent first side plates; and / or, the second bottom plate and the three second side plates are an integral bending and forming structure, and a second gap is formed between the two adjacent second side plates.

[0014] In one of the embodiments, the gas-liquid separator comprises a shell assembly, a gas inlet pipe such as the gas guide of any one of the above, the shell assembly is provided with a cavity and a gas outlet communicating with the cavity, the gas inlet pipe is connected to the shell assembly and communicates with the cavity, the gas guide is arranged in the cavity, and the inlet communicates with the cavity and the outlet communicates with the gas outlet.

[0015] In one of the embodiments, the shell assembly comprises an upper end cover, a lower end cover and a barrel, the upper end cover and the lower end cover are connected to two ends of the barrel respectively and form a cavity therebetween, the gas outlet is arranged on the upper end cover, and the gas inlet pipe is arranged through the upper end cover and extends into the cavity.

[0016] In one of the embodiments, one end of the upper end cover and / or the lower end cover is provided with a contraction section which is contracted towards the direction close to the axis of itself and a connecting section connected to the contraction section, the connecting section extends into the barrel and is welded with the barrel, and the contraction section is overlapped on the end face of the barrel at the junction with the connecting section.

[0017] In one of the embodiments, the end face of the barrel is configured as a slope, one end of the slope abuts at the junction of the contraction section and the connecting section, and the other end expands outward relative to the contraction section, and the slope and the contraction section form a receiving groove therebetween.

[0018] The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0019] To better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference can be made to one or more drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the presently described embodiments and / or examples, and the best mode presently contemplated of these inventions.

[0020] Fig. 1 is a structural schematic view of a gas-liquid separator provided by the application.

[0021] Fig. 2 is an exploded view of the gas-liquid separator provided by the application.

[0022] Fig. 3 is a top view of the gas-liquid separator provided by the application.

[0023] Fig. 4 is a sectional view of Fig. 3 at A-A.

[0024] Fig. 5 is an exploded view of a gas guide provided by the application.

[0025] 100, gas-liquid separator; 10, gas guide; 11, gas-liquid separation channel; 111, inlet; 112, outlet; 14, first box body; 141, first bottom plate; 1411, first edge; 1412, second edge; 1413, third edge; 1414, fourth edge; 142, first side plate; 143, first opening; 144, second opening; 145, first gap; 15, second box body; 151, second bottom plate; 1511, fifth edge; 1512, sixth edge; 1513, seventh edge; 1514, eighth edge; 152, second side plate; 153, third opening; 154, fourth opening; 155, second gap; 20, cavity; 30, gas outlet; 40, shell assembly; 41, upper end cover; 411, contraction section; 412, connecting section; 413, accommodating groove; 42, lower end cover; 43, barrel; 431, inclined surface; 50, gas inlet pipe; 51, gas inlet. DETAILED DESCRIPTION

[0026] To make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0028] In addition, the terms "first", "second", etc. are used only for the purpose of description and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0029] In the present application, unless specifically defined and limited otherwise, the first feature is "on", "under", "above" or "over" the second feature, which means that the first feature is in contact with the second feature directly or indirectly through an intermediate medium. Moreover, the first feature is "above", "over" or "on" the second feature, which means that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" or "underneath" the second feature, which means that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0030] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0031] Referring to FIGS. 1-4, the present application provides a gas guide 10, which is arranged in a cavity 20 of a gas-liquid separator 100, and the gas-liquid separator 100 is provided with a gas outlet 30 communicating with the cavity 20. The gas guide 10 is internally formed with a gas-liquid separation channel 11, which has an inlet 111 and an outlet 112. The inlet 111 communicates with the cavity 20, and the outlet 112 is located above the inlet 111 along a first predetermined direction X and is used to communicate with the gas outlet 30. Furthermore, along the direction from the inlet 111 to the outlet 112, the gas-liquid separation channel 11 reciprocally turns back between two opposite ends of the gas guide 10 along a second predetermined direction Y, wherein the first predetermined direction X and the second predetermined direction Y are perpendicular to each other.

[0032] It should be noted that "the gas-liquid separation channel 11 reciprocally turns back between two opposite ends of the gas guide 10 along the second predetermined direction Y" means that the gas-liquid separation channel 11 extends along the first predetermined direction X while turning back direction between two opposite ends of the gas guide 10 along the second predetermined direction Y. Furthermore, in actual use of the gas guide 10, the first predetermined direction X refers to the vertical direction, and the second predetermined direction Y refers to the horizontal direction.

[0033] The gas-liquid mixed refrigerant in the cavity 20 enters the gas-liquid separation channel 11 from the inlet 111, and the gas-liquid separation channel 11 reciprocally turns back between the two ends of the gas guide 10 in the horizontal direction along the direction from the inlet 111 to the outlet 112. Therefore, the gas-liquid mixed refrigerant collides continuously due to the change of the flow direction during the upward flow in the gas-liquid separation channel 11, in which the liquid refrigerant adheres to the inner wall of the gas-liquid separation channel 11 and collects under the action of gravity and then drips from the inlet 111 to the bottom of the cavity 20; the gaseous refrigerant continues to flow upward to the outlet 112 and then is discharged from the cavity 20 through the gas outlet 30. In this way, by arranging the gas-liquid separation channel 11 in the gas guide 10, the collision effect of the gas-liquid mixed refrigerant can be enhanced, thereby effectively improving the gas-liquid separation effect. Moreover, the gas guide 10 provided in the application replaces the part of the gas outlet pipe in the cavity in the related structure, thereby facilitating the improvement of the gas-liquid separation effect. The gas-liquid mixed refrigerant includes but is not limited to CO2 refrigerant.

[0034] Optionally, in an embodiment, as shown in FIG. 4, the gas-liquid separation channel 11 extends in an S shape along the direction from the inlet 111 to the outlet 112. That is, the gas-liquid separation channel 11 only turns back twice between the two ends of the gas guide 10 in the horizontal direction along the direction from the inlet 111 to the outlet 112. It can be understood that the more times the gas-liquid separation channel 11 reciprocally turns back between the two ends of the gas guide 10 in the second preset direction Y, the longer the flow channel of the gas-liquid mixed refrigerant, and the better the repeated collision effect of the gas-liquid mixed refrigerant with the wall surface of the gas-liquid separation channel 11, thereby improving the gas-liquid separation effect of the refrigerant, but at the same time, it will also lead to a more complex structure of the gas-liquid separation channel 11. By arranging the gas-liquid separation channel 11 in an S shape, the gas-liquid separation effect is ensured while the structure of the gas-liquid separation channel 11 is relatively simple. In other embodiments, the gas-liquid separation channel 11 can also turn back three times, four times or five times between the two ends of the gas guide 10 in the horizontal direction along the direction from the inlet 111 to the outlet 112, and the specific number can be set according to actual needs.

[0035] Please refer to FIG. 2 and FIG. 5. Optionally, in some embodiments, the gas guide 10 includes a first box body 14 and a second box body 15, the second box body 15 is arranged inside the first box body 14, and at least part of the wall surface of the second box body 15 is arranged in a spaced manner with at least part of the wall surface of the first box body 14 to form the gas-liquid separation channel 11.

[0036] Alternatively, in other embodiments, the gas guide 10 can be arranged as a whole box body, and then the gas-liquid separation channel 11 is opened in the box body.

[0037] Exemplarily, in an embodiment, the first box body 14 comprises a first bottom plate 141 and three first side plates 142, along the circumference of the first bottom plate 141, the first bottom plate 141 comprises a first edge 1411, a second edge 1412, a third edge 1413 and a fourth edge 1414, the three first side plates 142 are respectively connected to the first edge 1411, the second edge 1412 and the third edge 1413 of the first bottom plate 141, and surround to form a first opening 143 at the fourth edge 1414 of the first bottom plate 141, and a second opening 144 is formed between the three first side plates 142. The second box body 15 is arranged inside the first box body 14 through the first opening 143, and the second opening 144 is used for communicating with the gas outlet 30.

[0038] Further, the second box body 15 comprises a second bottom plate 151 and three second side plates 152, along the circumference of the second bottom plate 151, the second bottom plate 151 comprises a fifth edge 1511, a sixth edge 1512, a seventh edge 1513 and an eighth edge 1514, the three second side plates 152 are respectively connected to the fifth edge 1511, the sixth edge 1512 and the seventh edge 1513 of the second bottom plate 151, and surround to form a third opening 153 at the eighth edge 1514 of the second bottom plate 151, and a fourth opening 154 is formed between the three second side plates 152; wherein the first opening 143 and the third opening 153 are away from each other, and at least part of the first opening 143 constitutes the inlet 111, the second opening 144 and the fourth opening 154 are correspondingly arranged and communicated to form the outlet 112, and the second bottom plate 151 and the second side plates 152 separate the inside of the first box body 14 to form the gas-liquid separation channel 11. Wherein the second box body 15 is arranged in the first box body 14 through the first opening 143 with the third opening 153 facing the first opening 143.

[0039] Specifically, the second bottom plate 151 is arranged in parallel with the first bottom plate 141, and the second side plates 152 are arranged in parallel with the corresponding first side plates 142, so that in the first box body 14, the two sides of the second bottom plate 151 along the first preset direction X form the first branch and the second branch which are parallel to each other; and the second bottom plate 151 and the second side plates 152 facing the third opening 153 are arranged in a spaced manner and surround to form a communication port, the communication port communicates the first branch and the second branch to form the gas-liquid separation channel 11.

[0040] Wherein, the flow area of the first branch and the second branch can be set according to actual needs, for example, in an embodiment, along the first preset direction X, the second bottom plate 151 is located at the middle position of the first box body 14, so that the flow area of the first branch and the second branch is the same or approximately the same.

[0041] Further, the second side plate 152 is close to the corresponding first side plate 142, and a smaller assembly gap is formed. It can be understood that if the above assembly gap is too large, after the gas-liquid mixed refrigerant enters the inlet 111, it may directly enter the outlet 112 along the assembly gap, thereby affecting the gas-liquid separation effect. If the above assembly gap is too small or the second side plate 152 is directly attached to the corresponding first side plate 142, it will cause the assembly of the second box body 15 and the first box body 14 to be difficult.

[0042] Along the first preset direction X, the fourth opening 154 is aligned with the second opening 144, the fourth opening 154 constitutes the outlet 112, and the second bottom plate 151, the first bottom plate 141 and part of the first side plate 142 form the inlet 111. In this way, under the condition that the size of the second box body 15 is the same, the internal space of the first box body 14 can be fully utilized, thereby forming sufficient space below the first box body 14 for forming part of the gas-liquid separation channel 11 and for forming the inlet 111 of the required size.

[0043] Optionally, the second box body 15 does not protrude from the first opening 143.

[0044] The first bottom plate 141 and the three first side plates 142 are an integral bending and forming structure, and a first gap 145 is formed between adjacent two first side plates 142; and / or, the second bottom plate 151 and the three second side plates 152 are an integral bending and forming structure, and a second gap 155 is formed between adjacent two second side plates 152. In other words, only the first bottom plate 141 and the three first side plates 142 can be configured as an integral bending and forming structure, specifically, the three first side plates 142 are bent towards the same side of the first bottom plate 141, so that the liquid refrigerant separated by the gas guide piece 10 can also flow out through the first gap 145 and drip to the bottom of the cavity 20. Only the second bottom plate 151 and the three second side plates 152 can also be configured as an integral bending and forming structure, specifically, the three second side plates 152 are bent towards the same side of the second bottom plate 151, so that the liquid refrigerant separated by the gas guide piece 10 can also flow out through the second gap 155 and drip to the bottom of the cavity 20. The first bottom plate 141 and the three first side plates 142 can also be configured as an integral bending and forming structure, and the second bottom plate 151 and the three second side plates 152 can also be configured as an integral bending and forming structure. In this way, the first box body 14 and the second box body 15 are easier to process.

[0045] But not limited to this, the first bottom plate 141 and the three first side plates 142 can also be an integral stamping and forming structure. Similarly, the second bottom plate 151 and the three second side plates 152 can also be an integral stamping and forming structure.

[0046] Please refer to Figs. 1-4 again, the application further provides a gas-liquid separator 100, which comprises a shell assembly 40, a gas inlet pipe 50 and the gas guide 10 of any one of the above embodiments. The shell assembly 40 is provided with a cavity 20 and a gas outlet 30 communicating with the cavity 20, the gas inlet pipe 50 is connected to the shell assembly 40 and communicates with the cavity 20, and the gas guide 10 is arranged in the cavity 20, with the inlet 111 communicating with the cavity 20 and the outlet 112 communicating with the gas outlet 30.

[0047] The shell assembly 40 comprises an upper end cover 41, a lower end cover 42 and a cylinder 43, the upper end cover 41 and the lower end cover 42 are respectively connected to the two ends of the cylinder 43 and form the cavity 20 with the cylinder 43, the gas outlet 30 is arranged on the upper end cover 41, and the gas inlet pipe 50 is arranged through the upper end cover 41 and extends into the cavity 20. Specifically, the gas outlet 30 is arranged at the middle part of the third opening 153.

[0048] As shown in Fig. 4, one end of the upper end cover 41 is provided with a contraction section 411 which is contracted towards the direction close to its own axis and a connecting section 412 connected to the contraction section 411, the connecting section 412 extends into the cylinder 43 and is welded with the cylinder 43, and the junction of the contraction section 411 and the connecting section 412 is overlapped on the end face of the cylinder 43. In this way, the upper end cover 41 and the cylinder 43 are conveniently installed and positioned, and the welding area of the upper end cover 41 and the cylinder 43 can be increased.

[0049] The end face of the cylinder 43 is configured as an inclined face 431, one end of the inclined face 431 abuts at the junction of the contraction section 411 and the connecting section 412, the other end of the inclined face 431 is expanded outwardly relative to the contraction section 411, and the inclined face 431 and the contraction section 411 form a receiving groove 413 therebetween, which is used for receiving welding material, so as to further increase the welding area of the upper end cover 41 and the cylinder 43. Of course, the connection between the lower end cover 42 and the cylinder 43 can also adopt the above form, which will not be described here. In this way, the connection between the upper end cover 41, the cylinder 43 and the lower end cover 42 is more firm, so as to improve the pressure-bearing capacity of the gas-liquid separator.

[0050] Further, the gas guide 10 is fixedly connected to the upper end cover 41.

[0051] Specifically, in an embodiment, the edge of the second opening 144 is welded to the upper end cover 41, and the upper edge of the fourth opening 154 is welded to the upper end cover 41.

[0052] Further, the upper end cover 41 is provided with a mounting plane, and the edge of the second opening 144 and the upper edge of the fourth opening 154 are respectively welded to the mounting plane. Optionally, the mounting plane can be provided with positioning marks corresponding to the edge of the second opening 144 and the upper edge of the fourth opening 154, respectively.

[0053] In one embodiment, as shown in Fig. 4, the air inlet pipe 50 has an air inlet 51 at one end extending into the cavity 20, the orientation of the air inlet 51 being opposite to the orientation of the inlet 111. In this way, air leakage between the air inlet pipe 50 and the air guide 10 can be avoided.

[0054] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they shall be considered within the scope of the present disclosure.

[0055] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A gas guide member installed in a cavity of a gas-liquid separator, the gas-liquid separator being provided with a gas outlet communicating with the cavity, characterized in that, The gas guide piece is internally formed with a gas-liquid separation channel, the gas-liquid separation channel has an inlet and an outlet, the inlet is communicated with the cavity, and the outlet is located above the inlet along a first preset direction X and is used for communicating with the gas outlet; And, along the direction from the inlet to the outlet, the gas-liquid separation channel reciprocally turns back between the two end portions of the gas guide piece along a second preset direction Y, wherein the first preset direction X and the second preset direction Y are perpendicular to each other.

2. The gas guide according to claim 1, wherein Along the direction from the inlet to the outlet, the gas-liquid separation channel extends in an S shape.

3. The gas guide according to claim 1, wherein The gas guide piece comprises a first box body and a second box body, the second box body is arranged inside the first box body, and at least part of the wall surface of the second box body is spaced apart from at least part of the wall surface of the first box body to form the gas-liquid separation channel.

4. The gas guide according to claim 3, wherein The first box body comprises a first bottom plate and three first side plates, along the circumference of the first bottom plate, the first bottom plate comprises a first edge, a second edge, a third edge and a fourth edge, the three first side plates are respectively connected to the first edge, the second edge and the third edge of the first bottom plate, and a first opening is formed around the fourth edge of the first bottom plate, and a second opening formed by the three first side plates is arranged away from the first bottom plate; The second box body is arranged inside the first box body through the first opening, and the second opening is used for communicating with the gas outlet.

5. The gas guide according to claim 4, wherein The second box body comprises a second bottom plate and three second side plates, along the circumference of the second bottom plate, the second bottom plate comprises a fifth edge, a sixth edge, a seventh edge and an eighth edge, the three second side plates are respectively connected to the fifth edge, the sixth edge and the seventh edge of the second bottom plate, and a third opening is formed around the eighth edge of the second bottom plate, and a fourth opening formed by the three second side plates is arranged away from the second bottom plate; Wherein, the first opening and the third opening are away from each other, at least part of the first opening constitutes the inlet, the second opening and the fourth opening are correspondingly arranged and communicated to form the outlet, and the second bottom plate and the second side plate divide the inside of the first box body to form the gas-liquid separation channel.

6. The gas guide according to claim 5, wherein The second bottom plate is arranged in parallel with the first bottom plate, and the second side plate is arranged in parallel with the corresponding first side plate, so that in the inside of the first box body, the two sides of the second bottom plate along the first preset direction X respectively form first and second branches which are parallel to each other; And, the second bottom plate is spaced apart from the second side plate facing the third opening and forms a communication port therearound, the first branch and the second branch are communicated to form the gas-liquid separation channel through the communication port.

7. The gas guide member according to claim 5, wherein Along the first preset direction X, the fourth opening is aligned with the second opening, the fourth opening constitutes the outlet, and the second bottom plate, the first bottom plate and part of the first side plate form the inlet therearound.

8. The gas guide according to claim 5, wherein The first bottom plate and the three first side plates are integrally formed by bending, and a first gap is formed between two adjacent first side plates. The second bottom plate and the three second side plates are integrally formed by bending, and a second gap is formed between two adjacent second side plates.

9. A gas-liquid separator characterized by, The gas-liquid separator comprises a shell assembly, a gas inlet pipe and the gas guide piece according to any one of claims 1-8, the shell assembly is provided with a cavity and a gas outlet communicating with the cavity, the gas inlet pipe is connected to the shell assembly and communicates with the cavity, the gas guide piece is arranged in the cavity, and the inlet communicates with the cavity and the outlet communicates with the gas outlet.

10. The gas-liquid separator of claim 9, wherein, The shell assembly comprises an upper end cover, a lower end cover and a cylinder, the upper end cover and the lower end cover are respectively connected to the two ends of the cylinder and surround the cylinder to form the cavity, the gas outlet is arranged on the upper end cover, and the gas inlet pipe is arranged in the upper end cover and extends into the cavity.

11. The gas-liquid separator of claim 10, wherein, One end of the upper end cover and / or the lower end cover is provided with a contraction section which is contracted towards the direction close to the axis thereof and a connecting section connected to the contraction section, the connecting section extends into the cylinder and is welded to the cylinder, and the contraction section and the connecting section are overlapped on the end face of the cylinder at the joint therebetween.

12. The gas-liquid separator of claim 11, wherein, The end face of the cylinder is configured as an inclined face, one end of the inclined face abuts against the joint of the contraction section and the connecting section, the other end of the inclined face is expanded outward relative to the contraction section, and the inclined face and the contraction section surround the accommodating groove.

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