Gas-liquid separator and refrigerating system thereof

Abstract

The utility model relates to the technical field of heat exchange, in particular to a gas-liquid separator and a refrigerating system thereof. The gas-liquid separator comprises a bent pipe and a filter assembly, a fixing hole is formed in the bent pipe, the filter assembly comprises a connecting piece and a filter screen, the connecting piece is connected with the bent pipe, the connecting piece is provided with a fixing hole, the fixing hole is communicated with the fixing hole, at least part of the connecting piece is located on the outer side of the bent pipe, and the filter screen is connected to the side, opposite to the bent pipe, of the connecting piece. The connecting piece comprises a limiting part, the limiting part is formed by sinking inwards from the peripheral wall of the connecting piece in the radial direction, the limiting part comprises a first side face located on the outer side of the connecting piece and a second side face located in the oil return hole, and the bent pipe abuts against the first side face or the second side face in a limiting mode. The connecting piece has the advantages that the connecting piece and the fixing hole are assembled and connected more stably and are not prone to falling off through the groove and the effect that the connecting piece is lifted to abut against the bent pipe, and follow-up welding work can be completed conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to a gas-liquid separator and a refrigeration system thereof. Background Art

[0002] The gas-liquid separator is provided with an elbow, and a fixed hole is provided at the bottom of the elbow. The refrigeration oil settled at the bottom and the dried liquid refrigerant can enter the fixed hole and be atomized and taken away by the high-speed airflow. In order to reduce the impurities entering the air conditioning system, a filter component is provided at the fixed hole.

[0003] The filter assembly is generally connected to the elbow by welding. Before welding, the filter assembly needs to be inserted and fixed in the fixing hole. However, due to the small contact area between the fixing hole of the elbow and the filter assembly, the filter assembly is prone to shaking, and is difficult and unstable to assemble under external force. Utility Model Content

[0004] Based on this, the utility model provides a gas-liquid separator for the above technical problems.

[0005] A gas-liquid separator, the gas-liquid separator comprising: a bent pipe, the bent pipe being provided with a fixing hole; a filter assembly, the filter assembly comprising a connector and a filter screen, the connector being connected to the bent pipe, and the connector being provided with an oil return hole, the oil return hole being communicated with the fixing hole, at least a portion of the connector being located on the outside of the bent pipe, the filter screen being connected to a side of the connector facing away from the bent pipe; wherein the connector comprises a limiting portion, the limiting portion being formed by being recessed inwardly from the outer peripheral wall of the connector along a radial direction of the connector, the limiting portion comprising a first side surface located on the outside of the connector and a second side surface located on the inside of the connector, the bent pipe being in limited contact with the first side surface or the second side surface.

[0006] In this way, the filter is connected to the bent pipe through the connecting piece, and a limiting portion that can abut against the bent pipe is constructed on the side wall of the connecting piece, so that the assembly connection between the connecting piece and the fixing hole is more stable and not easy to fall off, which facilitates the completion of subsequent welding work.

[0007] In one embodiment, the limiting portion is radially recessed inward from the outer peripheral wall to form a groove, the groove surrounds the outer wall of the connecting member, the groove wall of the groove is the first side surface, and at least a portion of the fixing hole wall is snapped to the first side surface.

[0008] In one embodiment, part of the hole wall of the fixing hole is bent inward to form a first flange, and the first flange forms a limiting hole coaxially arranged with the fixing hole, so that the hole wall of the limiting hole abuts against the outer peripheral wall of the part of the connecting member extending into the bent pipe.

[0009] In one embodiment, along the axial direction of the connecting member, an end of the first flange away from the filter screen is arranged flush with an end of the connecting member away from the filter screen.

[0010] In one embodiment, the hole wall of the fixing hole includes a folded section and a snap-on section, the folded section is bent inward to form the first flange, a groove is provided on the outer wall of the connecting piece, the snap-on section extends into the groove along the radial extension portion to form a snap connection, and the folded section and the snap-on section are symmetrically arranged relative to the axis of the fixing hole.

[0011] In one embodiment, the limiting portion is recessed in a radially inward direction to form a protrusion, an outer wall of the protrusion is the second side surface, and the protrusion surrounds the inner wall of the connecting member.

[0012] In one embodiment, the inner diameter of the protruding portion of the connector is D1, and D1 satisfies: 1 mm ≤ D1 ≤ 3 mm.

[0013] In one embodiment, the outer diameter of the connecting member is D2, and D2 satisfies: 3mm≤D2≤5mm, and D1<D2.

[0014] In one embodiment, the diameter of the filter screen gradually increases along a direction approaching the connecting member.

[0015] The utility model also provides a refrigeration system, comprising the gas-liquid separator as described above.

[0016] Compared with the prior art, the filter assembly of the utility model includes a connector and a filter screen, the filter screen is connected to the fixing hole of the elbow through the connector, and a protrusion and a groove are arranged on the connector, and the abutment effect of the protrusion and the groove with the elbow makes the assembly connection between the connector and the fixing hole more stable and not easy to fall off, which facilitates the completion of subsequent welding work. In addition, the setting position of the groove and the protrusion is flexible, which can adapt to elbows of different structures and has higher adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of one embodiment of the elbow and filter assembly provided by the utility model;

[0018] Figure 2 for Figure 1 A local enlarged view of point A in FIG.

[0019] Figure 3 A cross-sectional view from another angle of one embodiment of the elbow and filter assembly provided by the utility model;

[0020] Figure 4A cross-sectional view of one embodiment of the elbow provided by the utility model;

[0021] Figure 5 A front view of one embodiment of the elbow provided by the utility model;

[0022] Figure 6 A front view of one embodiment of the elbow and filter assembly provided by the utility model;

[0023] Figure 7 A cross-sectional view of another embodiment of the elbow provided by the utility model;

[0024] Figure 8 A cross-sectional view of another embodiment of the elbow and filter assembly provided by the utility model;

[0025] Fig. 9 for Figure 8 A partial enlarged view of point B in FIG.

[0026] The symbols in the figure mean the following:

[0027] 100, gas-liquid separator; 10, elbow; 11, fixing hole; 111, first flange; 112, limiting hole; 113, folding section; 114, snap-on section; 115, second flange; 20, filter assembly; 21, connector; 211, oil return hole; 213, first side surface; 214, second side surface; 215, groove; 216, protrusion; 22, filter screen. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0033] The utility model provides a gas-liquid separator 100, comprising a bent pipe 10 and a filter assembly 20, wherein the filter assembly 20 is connected to a fixing hole 11 opened on the bent pipe 10, and a groove 215 or a protrusion 216 is provided on the filter assembly 20 to improve the assembly stability of the filter assembly 20 before being welded to the bent pipe 10.

[0034] See also Figure 1-Figure 3 The gas-liquid separator 100 includes a curved pipe 10 and a filter assembly 20. The curved pipe 10 is provided with a fixing hole 11. The filter assembly 20 includes a connector 21 and a filter screen 22. The connector 21 is connected to the curved pipe 10, and the connector 21 is provided with an oil return hole 211. The oil return hole 211 is communicated with the fixing hole 11. At least part of the connector 21 is located on the outside of the curved pipe 10. The filter screen 22 is connected to the side of the connector 21 facing away from the curved pipe 10. The connector 21 includes a limiting portion, which is radially recessed inward from the outer peripheral wall of the connector 21. The limiting portion includes a first side surface 213 located on the outside of the connector 21 and a second side surface 214 located in the oil return hole 211. The curved pipe 10 is limitedly abutted against the first side surface 213 or the second side surface 214.

[0035] In this way, the filter screen 22 is connected to the bent pipe 10 through the connecting piece 21, and a limiting portion is constructed on the side wall of the connecting piece 21 that can abut against the bent pipe 10 to limit the position, so that the assembly connection between the connecting piece 21 and the fixing hole 11 is more stable and not easy to fall off, which facilitates the completion of subsequent welding work.

[0036] Specifically, in this embodiment, after the limiting portion is radially recessed inward from the outer peripheral wall, a groove 215 is formed on the outer side of the connecting member 21, and a protrusion 216 is formed on the inner side of the connecting member 21 (that is, on the hole wall of the oil return hole 211), the groove wall of the groove 215 is the first side surface 213, and the outer side surface of the protrusion 216 is the first side surface 213.

[0037] The diameter of the filter screen 22 gradually increases along the direction approaching the connecting member 21 to ensure the connection area between the filter screen 22 and the connecting member 21 and improve the filtering efficiency.

[0038] There are various embodiments of the structure of the fixing hole 11 formed by the bent pipe 10. There are also various embodiments of the arrangement of the connecting member 21 for the fixing holes 11 with different structures, which are described in detail one by one.

[0039] Embodiment 1

[0040] In this embodiment, part of the connector 21 extends into the elbow 10, and a groove 215 is provided on the outer wall of the connector 21. The groove 215 surrounds the outer wall of the connector 21, and the groove wall of the groove 215 is the first side surface 213. At least part of the hole wall of the fixing hole 11 formed in the elbow 10 is snapped to the first side surface 213. In this way, the structure formed by the hole wall of the fixing hole 11 and the groove wall of the groove 215 abut against each other to limit the position, so that the connector 21 is snapped into the fixing hole 11 to ensure that its position is fixed.

[0041] The groove wall of the groove 215 is set to be an arc shape to facilitate processing and also facilitate the abutment between the hole wall of the fixing hole 11 and the groove 215. In other embodiments, the groove 215 can also be set to a rectangular groove, so that it is more compatible with the hole wall of the fixing hole 11 and has higher abutment strength.

[0042] On this basis, the hole wall of the fixing hole 11 not only abuts against the groove 215, but also partially bends inward to form a first flange 111, and the first flange 111 forms a limiting hole 112 coaxially arranged with the fixing hole 11, so that the hole wall of the limiting hole 112 abuts against the outer peripheral wall of the portion of the connecting member 21 extending into the elbow 10. In this way, the hole wall of the limiting hole 112 forms a secondary abutment with the connecting member 21, so that the connection between the filter assembly 20 and the hole wall of the fixing hole 11 is more stable.

[0043] The coaxial arrangement means that the center of the flow opening formed by the limiting hole 112 and the center of the flow opening formed by the fixing hole 11 are located on the same axis.

[0044] For further information, see Figure 4-Figure 6 The hole wall of the fixing hole 11 includes a folding section 113 and a clamping section 114. The folding section 113 is bent inward to form a first flange 111. The clamping section 114 extends along the radial direction and is clamped with the groove 215. The folding section 113 and the clamping section 114 are symmetrically arranged relative to the axis of the fixing hole 11. In this way, the symmetrically arranged clamping section 114 can provide a balanced abutment and clamping effect to the groove 215 of the connecting member 21, and the folding section 113 can also make the outer side wall of the connecting member 21 receive a balanced abutment effect, thereby further improving the connection strength between the connecting member 21 and the hole wall of the fixing hole 11. That is to say, when the clamping section 114 is clamped in the groove 215, part of the hole wall of the fixing hole 11 is clamped to the first side surface 213. If the clamping section 114 is not provided, the hole wall of the fixing hole 11 can also be circumferentially clamped with the groove 215.

[0045] Furthermore, along the axial direction of the connecting member 21, the end of the first flange 111 away from the filter screen 22 is flush with the end of the connecting member 21 away from the filter screen 22. In this way, the flatness of the structure is improved, so that the first flange 111 does not hinder the medium from flowing into the oil return hole 211, and the flow rate of the fixing hole 11 is improved.

[0046] Embodiment 2

[0047] See also Figure 7-Figure 9 In this embodiment, the inner wall of the connecting member 21 is provided with a protrusion 216 along the radial inward direction, the outer wall of the protrusion 216 is the second side surface 214, the protrusion 216 forms an oil return hole 211, and the hole wall of the fixing hole 11 is bent outward to form a second flange 115, the second flange 115 extends into the connecting member 21 and abuts against the protrusion 216. In this way, the filter assembly 20 is completely arranged on the outside of the elbow 10, and will not affect the flow area of ​​the fixing hole 11, so it can be applied to the elbow 10 with a smaller inner diameter (for example, the elbow 10 with a diameter of less than 16mm), and the groove 215 is used as the positioning surface to ensure reliable installation. The weld is on the outside of the elbow 10, which is convenient for using welding processes such as laser welding, argon arc welding, and resistance welding, reducing energy consumption in the production process and improving production flexibility.

[0048] It should be explained that inward refers to from the outer surface toward the inside of the curved pipe 10 , and outward refers to from the outer surface toward the outside of the curved pipe 10 .

[0049] In this embodiment, the outer side wall of the protrusion 216 is configured to be an arc shape, which is convenient for processing and can form a certain interference fit during the abutment with the connecting pipe, thereby avoiding structural damage caused by excessive abutment.

[0050] Embodiment 3

[0051] In this embodiment, the side wall of the connecting member 21 is recessed in the radially inward direction to simultaneously form the protrusion 216 and the groove 215, and no additional protrusion 216 or groove 215 is required, thereby saving material cost and processing cost. For example, the protrusion 216 and the groove 215 can be directly formed by a stamping process.

[0052] See also Figure 2 In the above three embodiments, when the inner side of the connector 21 has a protrusion 216, the protrusion 216 surrounds the inner side wall of the connector 21, and the inner diameter of the portion of the connector 21 having the protrusion 216 is D1, and D1 satisfies: 1mm≤D1≤3mm. In this way, the abutment effect of the circumferentially arranged protrusion 216 and the elbow 10 is more stable, and the inner diameter of the protrusion 216 of the connector 21 is reasonably specified, which not only prevents the protrusion 216 from protruding too high relative to the inner wall of the connector 21 and affecting the medium flow, but also prevents the protrusion 216 from protruding too short and failing to achieve a good abutment effect.

[0053] Exemplarily, D1 can be set to 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, as long as it is within the above two endpoint values.

[0054] The outer diameter of the connector 21 is D2, and D2 satisfies: 3mm≤D2≤5mm, and D1<D2. The outer diameter of the connector 21 is larger than the inner diameter of the protrusion 216 to ensure the formation of the groove 215, and the diameter of the connector 21 is reasonably set to avoid the connector 21 being too small to cause insufficient flow in the fixing hole 11 and the groove 215 being difficult to process, and also to prevent the connector 21 from being too large to fit the fixing hole 11.

[0055] The utility model also provides a refrigeration system, comprising the gas-liquid separator 100 as described above.

[0056] Compared with the prior art, the filter assembly 20 of the utility model includes a connector 21 and a filter screen 22. The filter screen 22 is connected to the fixing hole 11 of the elbow 10 through the connector 21, and a protrusion 216 and a groove 215 are provided on the connector 21. The protrusion 216 and the groove 215 make the assembly connection between the connector 21 and the fixing hole 11 more stable and not easy to fall off through the abutment effect with the elbow 10, which facilitates the completion of subsequent welding work. In addition, the setting positions of the protrusion 216 and the groove 215 are flexible, which can adapt to elbows 10 of different structures and have higher adaptability.

[0057] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A gas-liquid separator, characterized in that: The gas-liquid separator comprises: A bent pipe (10), wherein the bent pipe (10) is provided with a fixing hole (11); A filter assembly (20), the filter assembly (20) comprising a connecting piece (21) and a filter screen (22), the connecting piece (21) being connected to the elbow (10), and the connecting piece (21) being provided with an oil return hole (211), the oil return hole (211) being communicated with the fixing hole (11), at least a portion of the connecting piece (21) being located outside the elbow (10), and the filter screen (22) being connected to a side of the connecting piece (21) facing away from the elbow (10); The connecting member (21) comprises a limiting portion, the limiting portion is formed by being recessed inwardly from the outer peripheral wall of the connecting member (21) along the radial direction of the connecting member (21), the limiting portion comprises a first side surface (213) located on the outside of the connecting member (21) and a second side surface (214) located on the inside of the connecting member (21), and the bent pipe (10) is in limiting contact with the first side surface (213) or the second side surface (214).

2. The gas-liquid separator according to claim 1, characterized in that: The limiting portion is recessed radially inward from the outer peripheral wall to form a groove (215), the groove (215) surrounds the outer side wall of the connecting member (21), the groove wall of the groove (215) is the first side surface (213), and at least a portion of the hole wall of the fixing hole (11) is snap-fitted to the first side surface (213).

3. The gas-liquid separator according to claim 2, characterized in that: A portion of the hole wall of the fixing hole (11) is bent inwardly to form a first flange (111), and the first flange (111) forms a limiting hole (112) coaxially arranged with the fixing hole (11), so that the hole wall of the limiting hole (112) abuts against the outer peripheral wall of the portion of the connecting member (21) extending into the bent pipe (10).

4. The gas-liquid separator according to claim 3, characterized in that: Along the axial direction of the connecting member (21), one end of the first flange (111) away from the filter screen (22) is arranged flush with one end of the connecting member (21) away from the filter screen (22).

5. The gas-liquid separator according to claim 3, characterized in that: The hole wall of the fixing hole (11) comprises a folded section (113) and a snap-fit ​​section (114); the folded section (113) is bent inwardly to form the first flange (111); a groove (215) is provided on the outer wall of the connecting piece (21); the snap-fit ​​section (114) extends into the groove (215) along a radially extending portion to form a snap connection; and the folded section (113) and the snap-fit ​​section (114) are both symmetrically arranged relative to the axis of the fixing hole (11).

6. The gas-liquid separator according to claim 1, characterized in that: The limiting portion is recessed in a radially inward direction to form a protrusion (216), an outer wall of the protrusion (216) is the second side surface (214), and the protrusion (216) surrounds the inner side wall of the connecting member (21).

7. The gas-liquid separator according to claim 6, characterized in that: The inner diameter of the portion of the connecting member (21) having the protrusion (216) is D1, and D1 satisfies: 1 mm ≤ D1 ≤ 3 mm.

8. The gas-liquid separator according to claim 5, characterized in that: The outer diameter of the connecting piece (21) is D2, and D2 satisfies: 3mm≤D2≤5mm, and D1<D2.

9. The gas-liquid separator according to claim 1, characterized in that: The diameter of the filter screen (22) gradually increases in a direction approaching the connecting member (21).

10. A refrigeration system, characterized in that: Comprising a gas-liquid separator as described in any one of claims 1-9.

Images