Gas-liquid separator

Abstract

A gas-liquid separator comprises a shell, a partition plate, an injection molding part and an end socket, the end socket comprises a first welding part and a main body part, the shell comprises a second welding part and a main body part, the second welding part and the first welding part are fixed together through laser welding and form a welding seam, and the welding seam and the injection molding part are separated by the partition plate. The partition plate is arranged between the welding seam and the injection molding part to isolate a heat source and direct radiation, deformation of the injection molding part caused by high temperature and laser radiation is avoided, and the effect of guaranteeing product quality is achieved.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a gas-liquid separator. Background Art

[0002] The gas-liquid separator is one of the important accessories in the thermal management system. There are usually injection molded parts inside the gas-liquid separator. For example, the filter includes an injection molded part. Some filters are set near the weld. If the gas-liquid separator is laser welded, the high temperature generated by the welding and the laser radiation may cause the injection molded part to deform or damage the filter, resulting in a decrease in the filtering function and a decrease in product quality. Utility Model Content

[0003] The purpose of this application is to provide a gas-liquid separator, which is beneficial to improving product quality.

[0004] To achieve the above purpose, one embodiment of the present application adopts the following technical solution:

[0005] A gas-liquid separator comprises a shell, a partition, an injection molded part and a head, wherein the head comprises a first welding part and a main body, the shell comprises a second welding part and a main body, the second welding part and the first welding part are fixed together by laser welding to form a weld, the partition comprises a mounting part, the mounting part is mounted to the head and / or the shell, and the weld and the injection molded part are separated by the partition.

[0006] One embodiment of the present application provides a gas-liquid separator, which provides a partition between the weld and the injection molded part. The weld and the injection molded part are separated by the partition, so that the injection molded part can be isolated from the heat source and avoid radiation during laser welding, thereby avoiding deformation or damage of the injection molded part caused by high temperature and laser radiation, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the three-dimensional structure of the gas-liquid separator of the present application;

[0008] Figure 2 yes Figure 1 A schematic diagram of the structure of the gas-liquid separator from top view shown;

[0009] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0010] Figure 4 yes Figure 2 A partial enlarged schematic diagram of the cross-sectional structure at the middle BB;

[0011] Figure 5 It is a partially enlarged schematic diagram of the cross-sectional structure of the shell head of another implementation method;

[0012] Figure 6 yes Figure 5 A schematic diagram of the local enlarged structure at F in the middle;

[0013] Figure 7 It is a schematic diagram of the three-dimensional structure of the filter assembly of the gas-liquid separator of the present application;

[0014] Figure 8 It is a schematic diagram of the three-dimensional structure of the inner shell of the gas-liquid separator of the present application;

[0015] Fig. 9 It is a schematic diagram of the three-dimensional structure of the heat exchanger of the gas-liquid separator of the present application;

[0016] Fig.10 It is a schematic diagram of the three-dimensional structure of the gas-liquid separator of the present application;

[0017] Fig.11 It is a schematic diagram of the three-dimensional structure of the head of the gas-liquid separator of the present application;

[0018] Fig.12 It is a schematic diagram of the three-dimensional structure of a head in another embodiment;

[0019] Fig.13 yes Figure 3 Schematic diagram of the cross-sectional structure at JJ in the middle. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-8 The utility model is further described with specific embodiments. In order to fully understand the utility model, many specific details are mentioned in the following detailed description. However, those skilled in the art should understand that the specific components, devices and features illustrated in the drawings and described herein are only exemplary and should not be regarded as limiting.

[0021] refer to Figure 1-3A gas-liquid separator includes a shell 1, a partition 23, an injection molded part 4 and a head 2, wherein the head 2 includes a first welding part 22 and a main body 21, and the shell 1 includes a second welding part 11 and a main body 15. The second welding part 11 and the first welding part 22 are fixed together by laser welding to form a weld 5, and the weld 5 and the injection molded part 4 are separated by the partition 23. The injection molded part 4 generally contains plastic or rubber materials, which are easily deformed or aged by heat, so that the product quality or life is significantly reduced, so it is necessary to avoid being affected by heat sources. The filter and bulk liquid cup in the gas-liquid separator generally use injection molded parts, and the sealing ring generally uses rubber parts. If these parts are close to the weld 5, they are easily deformed and damaged by heat, and the partition 23 must be used to isolate them. The partition 23 can isolate direct heat radiation and gas flow of heat convection. For laser welding, it can also prevent the laser leaking from the gap from directly irradiating the internal heat-sensitive parts, and prevent the injection molded part 4 from deformation or aging, so that the product quality is guaranteed. If the partition 23 is made of heat-insulating materials, the effect will be better, but the corresponding cost will also increase. Generally, metal materials can meet the needs, and metal materials are easy to process and manufacture, while injection molding materials are not resistant to high temperatures. However, even if the partition 23 is deformed, it will not affect the use of the product. It only needs to ensure that the spacing state can be maintained for a few seconds during welding. This requires a certain thickness. The partition 23 is small in size, and even if metal materials are used, the cost is low. Therefore, directly using metal materials is a better choice.

[0022] refer to Figure 4 The partition 23 includes a mounting portion 26 and a blocking portion 27. The mounting portion 26 is mounted to the end cap 2 and / or the shell 1. A first gap 232 is left between the blocking portion 27 and the end cap 2, and a second gap 231 is left between the blocking portion 27 and the shell 1. Such a design structure is simple and convenient for installation and manufacturing. The partition 23 can be made separately and can be produced using low thermal conductivity materials to achieve better thermal insulation. The mounting portion 26 can be installed to the end cap 2 or the shell 1 by means of interference fit, welding, clamping or riveting. The mounting portion 26 can be installed at both ends to the end cap 2 and the shell 1 respectively. Of course, the mounting portion 26 can also be integrally formed with the end cap 2 or the shell 1. The blocking portion 27 can be made of iron sheet. Stainless steel has lower thermal conductivity and is better for making the blocking portion 27. The surface of stainless steel needs to increase the roughness to reduce the reflection effect, so as to provide better protection for the internal injection molded parts 4. To ensure the heat insulation effect, the size of the installation part 26 is smaller than that of the blocking part 27. In this way, the design gap is larger. If the partition is made of a material with poor thermal conductivity, the heat insulation effect will be better. Of course, the size is limited by the internal structure and cannot interfere with other internal components.

[0023] refer to Figure 5 and Figure 6The first welding part 22 and the partition 23 are coaxially arranged on the head 2. The inner diameter of the first welding part 22 is larger than the outer diameter of the partition 23. A third gap 220 is left between the partition 23 and the first welding part 22. A fourth gap 130 is left between the partition 23 and the shell 1. The first welding part 22 is tubular and integrally formed with the head 2. The partition 23 is tubular and integrally formed with the head 2. The integral structure can reduce the installation steps, reduce the assembly time, and improve the production efficiency. The coaxial arrangement is convenient for processing and heats evenly. The gap can have a better heat insulation effect, prolong the heat conduction time, and better protect the injection molded part 4. The partition 23 has a lower processing accuracy requirement and can be formed by high-pressure casting, which has higher production efficiency.

[0024] refer to Figure 7 The injection molded part 4 is a filter assembly 41, and the filter assembly 41 includes a mesh 42 and a mesh frame 43, and the mesh frame 43 fixes or limits the mesh 42. The mesh 42 is relatively thin and cannot maintain a specific shape, so it must be supported by the mesh frame 43. The mesh frame 43 and the mesh 42 can be integrally formed by injection molding, or a clamping mesh frame 43 structure can be designed to clamp the mesh 42. Such a design structure is simple and has low cost. The filter assembly 41 is annular as a whole, so even if it is a thin sheet structure, it only needs to be fixed at both ends to maintain a stable shape. Such a design saves materials, has stable and reliable performance, and has a large effective filtering area, which can reduce flow resistance and increase work efficiency.

[0025] refer to Figure 3 , Figure 8 and Fig.13 The gas-liquid separator is provided with an inner shell 8, a first annular groove 81 is provided at the lower end of the inner shell 8, a second annular groove 28 is provided at the head 2, and the filter assembly 41 is annular. The first annular groove 81 fixes or limits the upper end of the filter assembly 41, and the second annular groove 28 fixes or limits the lower end of the filter assembly 41. Such a simple design structure can well limit or fix the filter assembly 41. When installing, the filter assembly 41 is pressed into the first annular groove 81 and then into the second annular groove 28. Since the inner shell 8 and the head 2 need to be fixed together, the filter assembly 41 does not need to be too tightly matched with the first annular groove 81 and the second annular groove 28. The groove structure can already limit the filter assembly 41. It is only necessary to ensure that impurities do not pass through the gap between the filter assembly 41 and the first annular groove 81 and the second annular groove 28.

[0026] refer to Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig.11, a claw 83 is provided at the bottom of the inner shell 8, and a blind hole 29 is provided at the center of the upper end of the head 2. The blind hole 29 is a stepped hole. At least part of the blind hole 29 presents a structure of being small outside and large inside, that is, the radius of the hole increases when the depth of the part increases to a certain value. For example, the aperture of the opening end, i.e., the aperture of the upper or middle end of the blind hole 29, is smaller than the aperture of the inner end of the blind hole 29, i.e., the aperture of the lower end of the blind hole 29. The claw 83 is clamped to the blind hole 29, so that only a certain pressure is needed to press the claw 83 into the blind hole 29, and the installation is convenient and quick. The hook of the claw 83 is designed to be an outward-turned structure so that it can better engage with the blind hole 29. The shape of the hook is not particularly limited, such as square, triangle, ellipse, etc. The hook can be protruded outward relative to the main part of the claw 83. The claw 83 is made of elastic material so that the claw 83 needs to be deformed before it can be installed in the blind hole 29. Similarly, if the claw 83 wants to be separated from the blind hole 29, a certain force is also needed to deform the claw 83. If the claw 83 is designed to be in the shape of a barb, then if the claw 83 is installed in the blind hole 29, the claw 83 will be self-locking under the external force in the axial direction of the blind hole 29, so that the locking of the claw 83 is more stable. Only when the claw 83 is subjected to a lateral force will the claw 83 move inward, and then the claw 83 can be separated from the blind hole 29. This design is troublesome to disassemble, but the installation is stable and reliable and not easy to fall off. The shape of the inner shell 8 can be set according to the space required by the parts near the inner shell 8. Under the premise of ensuring that the inner cavity 82 has a larger space as much as possible, a concave structure can be locally set to avoid external parts, so that the space utilization rate can be higher.

[0027] refer to Figure 3 , Figure 4 , Figure 7 and Fig. 9 The gas-liquid separator is provided with a sealing cover 7, and a third welding portion 17 is provided at the upper end of the shell 1. The third welding portion 17 is welded to the sealing cover 7, and the upper end of the inner shell 8 is limited or fixed to the sealing cover 7. This design facilitates installation. If the shell 1 and the sealing cover 7 are an integrated structure, it is difficult to install the inner shell 8 on the shell 1 after it is installed on the head 2. In this way, it is difficult to achieve positioning of the two ends of the inner shell 8. The shell 1 and the sealing cover 7 adopt a split design. In this way, no matter whether the inner shell 8 is installed on the head 2 or the sealing cover 7 first, the subsequent installation is relatively easy. Of course, considering the installation of other components, it is more reasonable to install it on the head first.

[0028] refer to Figure 3 , Figure 4 , Figure 7 and Fig. 9The cover 7 is provided with an inlet portion 71, the inner shell 8 is provided with an inlet pipe 88 and an inner cavity 82, the inlet pipe 88 is communicated with the inner cavity 82, the inlet pipe 88 is limited or fixed by the inlet portion 71, the inner cavity 82 is provided with a gas separation structure, so the external two-phase fluid needs to enter the inner cavity 82, the inlet portion 71 can be connected to other external pipelines, or the inlet pipe 88 is directly connected to other external pipelines. This design can limit the inner shell 8 through the inlet pipe 88, and can also achieve communication with the inner cavity 82 of the inner shell 8. The structure is simple and easy to install.

[0029] refer to Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13 The gas-liquid separator is provided with a heat exchange tube 3 and a heat exchanger 33. The heat exchanger 33 is located outside the inner shell 8, and the heat exchanger 33 is located inside the shell 1. The upper end of the heat exchange tube 3 is connected to the heat exchanger 33. The head 2 is provided with a heat exchange interface 32. The heat exchange tube 3 is limited or fixed by the heat exchange interface 32. The heat exchange tube 3 is located outside the filter assembly 41. The filter assembly 41 is provided with a concave area at the position of the heat exchange tube 3 to avoid the heat exchange tube 3, ensuring that the heat exchange tube 3 has enough space and does not interfere with the filter assembly 41. Therefore, part of the filter assembly 41 is further away from the weld 5, and is less affected by the heat radiation during welding, and is not easily deformed. The heat exchanger 33 can make the refrigerant flowing in the gas separation low-pressure pipeline dryer, and can increase the superheat of the refrigerant, thereby improving the working efficiency of the thermal management system. Considering that the gas-liquid separator is relatively long, the air inlet and the air outlet can be arranged opposite to each other, that is, the air outlet portion 38 is provided on the head 2 to connect with other external components, and the heat exchanger 33 can be provided with a second pipe 39, which is connected to the second interface portion 37 provided on the cover 7, and then connected to other pipes or components through the second interface portion 37. The heat exchanger 33 generally uses fine pipes to increase the heat exchange area, and adding fins outside the pipes will have a better effect. The number, shape and arrangement direction of the fins can be designed according to actual needs. Generally speaking, the denser the fins, the better the heat exchange effect, but the flow resistance will also increase accordingly, so it needs to be designed according to actual conditions.

[0030] refer to Figure 5 and Figure 6 The partition 23 is fixed to the main body 21, and the partition 23 is coaxially arranged with the first welding part 22. The outer diameter of the partition 23 is smaller than the inner diameter of the first welding part 22. This design is convenient for manufacturing. It can be cast as a whole with the head 2 and then machined, or it can be directly machined. The casting production efficiency is high, and the direct machining cost of small batch production is low.

[0031] refer to Figure 5 and Figure 6, the gap width G between the partition 23 and the first welding part 22 is greater than the thickness m of the first welding part 22, so that the partition 23 and the weld 5 maintain a certain distance, so that the partition 23 is less exposed to heat radiation, the temperature rise of the partition 23 is lower, and the thermal insulation effect is better. The width L of the fourth annular gap 130 is greater than the thickness of the partition 23. The head 2 is generally made of aluminum alloy. Since the thermal conductivity of aluminum alloy is very good, the partition 23 cannot be too thick, especially the width of the fourth annular gap 130 should be increased to ensure the thermal insulation effect. Generally speaking, the gap width G is between 2mm-5mm. If it is too large, it is not easy to process, and if it is too small, the thermal insulation effect is not good. In the embodiment, the gap width G is equal to 3mm. The thickness m of the first welding part 22 is generally 1.5mm-4mm. In the embodiment, the thickness m of the first welding part 22 is 2.5mm.

[0032] refer to Figure 5 and Figure 6 , measured from the same reference point of the end cap 2, the height H of the first welding portion 22 is less than the height H+K of the partition 23, the weld 5 is located on the end surface of the first welding portion 22, and the partition 23 is designed to be higher to shield the weld 5, so as to prevent the heat radiation generated by the high temperature during the welding of the weld 5 from directly irradiating the injection molded part 4, causing damage or aging of the parts. The height difference K is generally 2mm-9mm, which has a better effect. In the embodiment, K is 3mm.

[0033] refer to Figure 5 and Figure 6 The height H of the first welding portion 22 is greater than twice the thickness m of the first welding portion 22, so that the heat conduction distance generated during welding can be extended, the temperature rise of the partition 23 can be reduced, and the internal injection molded part 4 can be protected. The greater the height H of the first welding portion 22, the longer the heat conduction distance is, which is helpful for heat insulation. The height H of the first welding portion 22 is usually 4mm-10mm, and the effect is better. In the embodiment, H is 6mm, and the thickness m of the first welding portion 22 is 2.5mm.

[0034] refer to Figure 3 , Figure 5 , Figure 6 , Fig.11 and Fig.12 The partition 23 is provided with a notch 25 or an oil return hole 52, which is opposite to the heat exchange tube 3. This design can avoid oil accumulation in the gap. The notch 25 or the oil return hole 52 is opposite to the heat exchange tube 3 to avoid damage to the injection molded part 4. This can cleverly solve the contradiction between the two, without oil accumulation and protecting the internal injection molded part 4. The notch 25 is mainly for oil drainage, and the oil return hole 52 can also be directly punched in the partition 23 to achieve it. Since the hole needs to be tilted at a certain angle, auxiliary tools are needed to accurately locate the hole, or use auxiliary tools to punch a small hole at the hole position first, and then use a drill to drill the hole, so that the oil return hole 52 can be processed.

[0035] refer to Figure 5 and Figure 6 The second welding part 11 includes a melting welding part 12 and a supporting welding part 13. The outer diameter of the melting welding part 12 is larger than the outer diameter of the supporting welding part 13. The inner diameter of the first welding part 22 is equal to the outer diameter of the supporting welding part 13. The outer diameter of the first welding part 22 is equal to the outer diameter of the melting welding part 12. The outer diameter of the partition 23 is smaller than the inner diameter of the supporting welding part 13. This design makes it easier to position before welding, and the depth of the weld 5 can be guaranteed during welding to avoid leakage points caused by welding penetration, so that the product quality is more stable.

[0036] refer to Figure 5 and Figure 6 The thickness m of the first welding portion 22 is greater than the thickness of the supporting welding portion 13. Such a design can ensure the strength of the first welding portion 22 and prevent the first welding portion 22 from cracking under high pressure. The thickness of the supporting welding portion 13 is generally 0.5mm-2mm, and the effect is better. In the embodiment, it is 1mm.

[0037] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A gas-liquid separator, characterized in that: The invention comprises a shell (1), a partition (23), an injection molded part (4) and a head (2), wherein the head (2) comprises a first welding part (22) and a main body (21), the shell (1) comprises a second welding part (11) and a main body (15), the second welding part (11) and the first welding part (22) are fixed together by laser welding to form a weld (5), the partition (23) comprises a mounting part (26), the mounting part (26) is mounted to the head (2) and / or the shell (1), and the weld (5) and the injection molded part (4) are separated by the partition (23).

2. The gas-liquid separator according to claim 1, characterized in that: The partition (23) comprises a blocking portion (27), a first gap (232) is left between the blocking portion (27) and the sealing head (2), and a second gap (231) is left between the blocking portion (27) and the shell (1).

3. The gas-liquid separator according to claim 1, characterized in that: The first welding portion (22) and the partition (23) are coaxially arranged on the head (2); the inner diameter of the first welding portion (22) is larger than the outer diameter of the partition (23); a third gap (220) is left between the partition (23) and the first welding portion (22); and a fourth gap (130) is left between the partition (23) and the shell (1).

4. The gas-liquid separator according to claim 2 or 3, characterized in that: The injection molded part (4) is a filter screen assembly (41), and the filter screen assembly (41) comprises a mesh sheet (42) and a mesh frame (43), and the mesh frame (43) fixes or limits the mesh sheet (42).

5. The gas-liquid separator according to claim 4, characterized in that: The gas-liquid separator is provided with an inner shell (8), the lower end of the inner shell (8) is provided with a first annular groove (81), the sealing head (2) is provided with a second annular groove (28), the filter assembly (41) is annular, the first annular groove (81) fixes or limits the upper end of the filter assembly (41), and the second annular groove (28) fixes or limits the lower end of the filter assembly (41).

6. The gas-liquid separator according to claim 5, characterized in that: The bottom of the inner shell (8) is provided with a claw (83), and the center position of the upper end of the head (2) is provided with a blind hole (29), the blind hole (29) is a stepped hole, and the claw (83) is clamped into the blind hole (29).

7. The gas-liquid separator according to claim 6, characterized in that: The gas-liquid separator is provided with a sealing cover (7), the upper end of the shell (1) is provided with a third welding portion (17), the third welding portion (17) is welded to the sealing cover (7), and the upper end of the inner shell (8) is limited or fixed to the sealing cover (7).

8. The gas-liquid separator according to claim 7, characterized in that: The sealing cover (7) is provided with an inlet portion (71), and the inner shell (8) is provided with an inlet pipe (88) and an inner cavity (82), the inlet pipe (88) is communicated with the inner cavity (82), and the inlet pipe (88) is limited or fixed by the inlet portion (71).

9. The gas-liquid separator according to any one of claims 5 to 8, characterized in that: The gas-liquid separator is provided with a heat exchange tube (3) and a heat exchanger (33); the heat exchanger (33) is located outside the inner shell (8); the heat exchanger (33) is located inside the shell (1); the upper end of the heat exchange tube (3) is connected to the heat exchanger (33); the end cap (2) is provided with a heat exchange interface portion (32); and the heat exchange tube (3) is limited or fixed by the heat exchange interface portion (32).

10. The gas-liquid separator according to claim 9, characterized in that: The partition plate (23) is provided with a notch (25) or an oil return hole (52), and the notch (25) or the oil return hole (52) is directly opposite to the heat exchange tube (3).

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