Gas collecting tube group and heat exchange assembly

Abstract

The utility model provides a gas collecting pipe group and a heat exchange assembly. The gas collecting pipe group comprises a gas collecting main pipe; the stainless steel branch pipes are arranged at at least one end of the gas collection main pipe, communicated with the gas collection main pipe and used for being connected with a heat exchanger; and the copper branch pipes are distributed on the gas collection main pipe in the length direction of the gas collection main pipe, communicate with the gas collection main pipe and are used for being connected with a heat exchanger. According to the scheme, the branch pipes at at least one end of the gas collection main pipe are the stainless steel branch pipes, and compared with an existing copper branch pipe, the stainless steel branch pipes are high in strength and stress resistance, so that although the stress borne by the stainless steel branch pipes located at the end of the gas collection main pipe is larger than that borne by the branch pipes located at other positions, the stress does not exceed the standard, and the risk of breakage is avoided; most of the branch pipes at other positions of the gas collection main pipe bear relatively small stress, and the copper branch pipes are still adopted, so that the strength requirement can be met, and the welding connection with the copper heat exchange pipe is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, and in particular to an air collecting pipe group and a heat exchange component. Background Art

[0002] The gas collecting pipe group in the air conditioning system mainly includes a gas collecting main pipe and multiple branch pipes distributed on the gas collecting main pipe. The branch pipes need to be welded to the heat exchange tubes in the heat exchanger. Since copper has a good heat exchange effect, the heat exchange tubes in the heat exchanger are usually copper tubes. In order to facilitate welding and connection with the heat exchange tubes, the branch pipes in the gas collecting pipe group are usually copper branch pipes.

[0003] When the gas collecting pipe group is used in the air conditioning system, the end of the gas collecting pipe is connected to structures such as a four-way reversing valve, and the branch pipe is connected to structures such as a heat exchanger. At this time, the branch pipe near the end is subjected to greater tensile stress. In addition, during use, the flow of refrigerant and the hot and cold changes caused by the switching of cooling and heating further increase the stress, which can easily cause the welded branch pipe at the end of the gas collecting pipe to be subjected to excessive stress, resulting in the risk of fracture and affecting product reliability. Therefore, it is necessary to optimize the existing gas collecting pipe group to solve the problem of poor stress resistance of the branch pipe at the end of the gas collecting pipe. Utility Model Content

[0004] The utility model provides a gas collecting pipe group and a heat exchange component to solve the problem of poor stress resistance of branch pipes at the end of the gas collecting main pipe in the prior art.

[0005] In order to solve the above problems, according to one aspect of the utility model, the utility model provides a gas collecting pipe group, including: a gas collecting main pipe; a stainless steel branch pipe, which is arranged at at least one end of the gas collecting main pipe, the stainless steel branch pipe is connected to the gas collecting main pipe, and the stainless steel branch pipe is used to connect to a heat exchanger; a plurality of copper branch pipes, which are distributed on the gas collecting main pipe at intervals along the length direction of the gas collecting main pipe, the copper branch pipes are connected to the gas collecting main pipe, and the copper branch pipes are used to connect to a heat exchanger; wherein, along the length direction of the gas collecting main pipe, the copper branch pipe is arranged farther away from at least one end of the gas collecting main pipe than the stainless steel branch pipe.

[0006] Furthermore, the gas collecting main pipe includes a straight pipe and a curved pipe, the two ends of the straight pipe are a head end and a tail end respectively, the tail end of the straight pipe is connected to the curved pipe, the stainless steel branch pipe is arranged at the tail end and / or the head end of the straight pipe, and multiple copper branch pipes are distributed on the straight pipe.

[0007] Furthermore, at the same end of the gas collecting main pipe, 1 to 5 stainless steel branch pipes are distributed at intervals.

[0008] Furthermore, the gas collecting pipe group also includes a copper pipe, which is fixedly connected to an end of the stainless steel branch pipe away from the gas collecting main pipe, and the copper pipe is used to connect to the heat exchanger.

[0009] Further, the stainless steel branch pipe has a bend, the copper pipe has a bend, and the stainless steel branch pipe and the copper pipe form a U-shaped pipe; or, the stainless steel branch pipe has two bends, the copper pipe has no bend, and the stainless steel branch pipe and the copper pipe form a U-shaped pipe.

[0010] Furthermore, the side wall of the gas collecting main pipe has a flange hole, one end of the stainless steel branch pipe is inserted into the flange hole and welded to the inner wall of the flange hole, and the other end of the stainless steel branch pipe is plugged into and welded to the copper pipe; and / or, one end of the copper branch pipe is inserted into the flange hole and welded to the inner wall of the flange hole.

[0011] Furthermore, the side wall of the gas collecting main pipe has a plurality of flanged holes; one end of the stainless steel branch pipe is inserted into the corresponding flanged hole and welded to the inner wall of the flanged hole, and the welding depth of the two is ≥1.5mm; one end of the copper branch pipe is inserted into the corresponding flanged hole and welded to the inner wall of the flanged hole, and the welding depth of the two is ≥1.5mm.

[0012] Further, the stainless steel branch pipe has at least one bend, and the copper branch pipe has at least one bend.

[0013] Furthermore, the straight pipe and the bent pipe are both made of stainless steel, and the gas collecting main pipe also includes a copper joint, which is plugged and welded to one end of the bent pipe.

[0014] Furthermore, the straight pipe and the curved pipe are an integrally formed structure; or, the straight pipe and the curved pipe are separate structures, and the straight pipe and the curved pipe are plugged and welded.

[0015] According to another aspect of the utility model, a heat exchange assembly is provided, which includes a heat exchanger and the above-mentioned gas collecting pipe group, and the stainless steel branch pipes and copper branch pipes in the gas collecting pipe group are respectively welded to the corresponding heat exchange pipes in the heat exchanger.

[0016] The technical scheme of the utility model is applied to provide a gas collecting pipe group, including: a gas collecting main pipe; a stainless steel branch pipe, which is arranged at at least one end of the gas collecting main pipe, the stainless steel branch pipe is connected to the gas collecting main pipe, and the stainless steel branch pipe is used to connect to a heat exchanger; a plurality of copper branch pipes, which are distributed on the gas collecting main pipe at intervals along the length direction of the gas collecting main pipe, the copper branch pipe is connected to the gas collecting main pipe, and the copper branch pipe is used to connect to a heat exchanger; wherein, along the length direction of the gas collecting main pipe, the copper branch pipe is arranged farther from at least one end of the gas collecting main pipe than the stainless steel branch pipe. In this scheme, the branch pipe at at least one end of the gas collecting main pipe is set as a stainless steel branch pipe. Compared with the existing copper branch pipe, the stainless steel branch pipe has high strength and strong stress resistance. Although the stress of the stainless steel branch pipe at the end of the gas collecting main pipe is greater than that of the branch pipe at other positions, the stress will not exceed the standard, thereby avoiding the risk of fracture; and most of the branch pipes at other positions of the gas collecting main pipe are subjected to relatively small stress, and copper branch pipes are still used, which can meet the strength requirements and facilitate welding connection with the copper heat exchange pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a gas collecting pipe group provided in an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 A partial enlarged view of .

[0020] The above drawings include the following reference numerals:

[0021] 10. Gas collecting main pipe; 11. Straight pipe; 12. Elbow pipe; 13. Copper joint; 20. Stainless steel branch pipe; 30. Copper branch pipe; 40. Copper connecting pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] like Figure 1 to Figure 2 As shown, an embodiment of the utility model provides a gas collecting pipe group, including: a gas collecting main pipe 10; a stainless steel branch pipe 20, which is arranged at at least one end of the gas collecting main pipe 10, the stainless steel branch pipe 20 is connected to the gas collecting main pipe 10, and the stainless steel branch pipe 20 is used to connect to a heat exchanger; a plurality of copper branch pipes 30, which are distributed on the gas collecting main pipe 10 along the length direction of the gas collecting main pipe 10, the copper branch pipes 30 are connected to the gas collecting main pipe 10, and the copper branch pipes 30 are used to connect to a heat exchanger; wherein, along the length direction of the gas collecting main pipe 10, the copper branch pipe 30 is arranged farther away from at least one end of the gas collecting main pipe 10 than the stainless steel branch pipe 20.

[0024] In this solution, the branch pipe at at least one end of the gas collecting main pipe 10 is set as a stainless steel branch pipe 20. Compared with the existing copper branch pipe, the stainless steel branch pipe 20 has high strength and strong stress resistance. Although the stress borne by the stainless steel branch pipe 20 at the end of the gas collecting main pipe 10 is greater than that of the branch pipes at other positions, the stress will not exceed the standard, thereby avoiding the risk of breakage. Most of the branch pipes at other positions of the gas collecting main pipe 10 are borne relatively small stress, and copper branch pipes 30 are still used, which can meet the strength requirements and facilitate welding connection with the copper heat exchange tube.

[0025] Specifically, Figure 1 As shown, the gas collecting main pipe 10 includes a straight pipe 11 and a curved pipe 12. The two ends of the straight pipe 11 are a head end and a tail end respectively. The tail end of the straight pipe 11 is connected to the curved pipe 12. The stainless steel branch pipe 20 is arranged at the tail end of the straight pipe 11 and / or the head end of the straight pipe 11. A plurality of copper branch pipes 30 are distributed on the straight pipe 11. The branch pipes are distributed at different positions on the straight pipe 11. When in use, due to the flow of the refrigerant and the cold and hot changes caused by the switching of cooling and heating, the tensile stress and thermal stress generated at the end of the straight pipe 11 are relatively large. Therefore, the stainless steel branch pipe 20 is arranged at the tail end of the straight pipe 11 or the head end of the straight pipe 11, which increases the strength of the branch pipe located at the end of the straight pipe 11, thereby improving the stress resistance of the branch pipe at this position, avoiding the branch pipe from breaking, and improving the safety of the product.

[0026] Among them, 1 to 5 stainless steel branch pipes 20 are distributed at intervals at the same end of the gas collecting main pipe 10. The first 1 to 5 branch pipes at the same end of the gas collecting main pipe 10 are subjected to greater stress, and the branch pipes at this position are set as stainless steel branch pipes 20 to avoid the risk of breakage. The specific number of stainless steel branch pipes 20 set at the same end of the gas collecting main pipe 10 is determined according to the stress conditions in the use environment.

[0027] For example, in Figure 1 In the embodiment, two stainless steel branch pipes 20 are arranged at the tail end of the straight pipe 11. In other embodiments not shown in the figure, a required number of stainless steel branch pipes 20 can also be arranged at the head end of the straight pipe 11.

[0028] like Figure 1 and Figure 2As shown, the gas collecting pipe group also includes a copper pipe 40, and the copper pipe 40 is fixedly connected to the end of the stainless steel branch pipe 20 away from the gas collecting main pipe 10, and the copper pipe 40 is used to connect to the heat exchanger. The gas collecting pipe group and the heat exchanger are components manufactured separately, and then assembled together by welding, and are usually connected by flame brazing. In this case, it is not easy to weld the stainless steel pipe and the copper pipe firmly. Therefore, the copper pipe 40 is fixedly connected to the end of the stainless steel branch pipe 20 in advance, and the copper pipe 40 is welded and connected to the copper heat exchange tube of the heat exchanger during assembly, so that a smooth and reliable connection can be made. Among them, the copper pipe 40 and the stainless steel branch pipe 20 can be reliably connected in advance by furnace brazing.

[0029] When setting up branch pipes, straight pipes or bent pipes can be used according to the use environment. Straight pipes are easy to process but may bear higher pulling force, which is suitable for environments with small forces and ample space. Bent pipes can achieve buffering, reduce the stress caused by fluid flow and hot and cold changes on the pipeline, avoid breakage, and bends can easily avoid other structures and avoid interference, which is suitable for environments with large forces or compact structures.

[0030] In this solution, the stainless steel branch pipe 20 has at least one bend, and the copper branch pipe 30 has at least one bend. By setting bends on the branch pipes, the purpose of stress buffering is achieved and the reliability of the gas collecting pipe group is improved.

[0031] like Figure 2 As shown, in a specific embodiment, the stainless steel branch pipe 20 has a bend, the copper pipe 40 has a bend, and the stainless steel branch pipe 20 and the copper pipe 40 form a U-shaped pipe. In this way, stress buffering can be achieved through the two bends to avoid the pipeline from being fractured due to stress.

[0032] Alternatively, in other embodiments not shown, the stainless steel branch pipe 20 has two bends, and the copper pipe 40 has no bends. The stainless steel branch pipe 20 and the copper pipe 40 form a U-shaped pipe, which can also achieve stress buffering through the two bends to avoid the pipeline from being fractured due to stress.

[0033] In this solution, the side wall of the gas collecting main pipe 10 has a flanged hole, one end of the stainless steel branch pipe 20 is inserted into the flanged hole and welded to the inner wall of the flanged hole, and the other end of the stainless steel branch pipe 20 is plugged and welded to the copper pipe 40. In this way, both ends of the stainless steel branch pipe 20 are fixed by plugging first and then welding, and the connection is reliable. Alternatively, one end of the copper branch pipe 30 is inserted into the flanged hole and welded to the inner wall of the flanged hole, and is fixed by plugging first and then welding, and the connection is reliable.

[0034] Furthermore, one end of the stainless steel branch pipe 20 is inserted into the corresponding flange hole and welded to the inner wall of the flange hole, and the welding depth of the two is ≥1.5mm; one end of the copper branch pipe 30 is inserted into the corresponding flange hole and welded to the inner wall of the flange hole, and the welding depth of the two is ≥1.5mm. By limiting the welding depth, it is ensured that the stainless steel branch pipe 20 and the copper branch pipe 30 have sufficient connection strength with the gas collecting main pipe 10, avoiding breakage or leakage at the welding position, and ensuring the reliability of the product.

[0035] In this solution, the straight pipe 11 and the curved pipe 12 are both made of stainless steel, which has higher strength and lower cost than copper. The gas collecting main pipe 10 also includes a copper joint 13, which is plugged and welded to one end of the curved pipe 12. The copper joint 13 is provided to facilitate reliable welding connection with other copper pipes.

[0036] like Figure 1 As shown, the straight pipe 11 and the bent pipe 12 are an integrally formed structure, that is, the end of a pipe is bent and formed.

[0037] Alternatively, in other embodiments not shown, the straight pipe 11 and the bent pipe 12 are separate structures, and the straight pipe 11 and the bent pipe 12 are plugged and welded. Among them, the bent pipe 12 can be purchased from existing standard parts and welded with the straight pipe 11 to form a product, so there is no need to perform pipe bending operations.

[0038] Another aspect of the utility model provides a heat exchange assembly, which includes a heat exchanger and the above-mentioned gas collecting pipe group, and the stainless steel branch pipe 20 and the copper branch pipe 30 in the gas collecting pipe group are respectively welded to the corresponding heat exchange pipes in the heat exchanger. In this solution, the branch pipe at at least one end of the gas collecting main pipe 10 is set as a stainless steel branch pipe 20. Compared with the existing copper branch pipe, the stainless steel branch pipe 20 has high strength and strong stress resistance. Although the stress borne by the stainless steel branch pipe 20 at the end of the gas collecting main pipe 10 is greater than that of the branch pipes at other positions, the stress will not exceed the standard, avoiding the risk of breakage; while most of the branch pipes at other positions of the gas collecting main pipe 10 are subjected to relatively small stress, and the copper branch pipe 30 is still used, which can meet the strength requirements and facilitate welding connection with the copper heat exchange pipe. Therefore, this solution improves the reliability of the heat exchange assembly.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

Claims

1. A gas collecting pipe group, characterized in that: include: Gas collecting main (10); a stainless steel branch pipe (20), arranged at at least one end of the gas collecting main pipe (10), the stainless steel branch pipe (20) being in communication with the gas collecting main pipe (10), and the stainless steel branch pipe (20) being used to be connected to a heat exchanger; a plurality of copper branch pipes (30) distributed on the gas collecting main pipe (10) at intervals along the length direction of the gas collecting main pipe (10), the copper branch pipes (30) being in communication with the gas collecting main pipe (10), and the copper branch pipes (30) being used to be connected to the heat exchanger; Wherein, along the length direction of the gas collecting main pipe (10), the copper branch pipe (30) is arranged farther from at least one end of the gas collecting main pipe (10) than the stainless steel branch pipe (20).

2. The gas collecting pipe assembly according to claim 1, characterized in that: The gas collecting main pipe (10) comprises a straight pipe (11) and a curved pipe (12); the two ends of the straight pipe (11) are respectively a head end and a tail end; the tail end of the straight pipe (11) is connected to the curved pipe (12); the stainless steel branch pipe (20) is arranged at the tail end of the straight pipe (11) and / or the head end of the straight pipe (11); and a plurality of the copper branch pipes (30) are distributed on the straight pipe (11).

3. The gas collecting pipe assembly according to claim 1, characterized in that: At the same end of the gas collecting main pipe (10), 1 to 5 stainless steel branch pipes (20) are distributed at intervals.

4. The gas collecting pipe assembly according to claim 1, characterized in that: The gas collecting pipe group further comprises a copper pipe (40), the copper pipe (40) being fixedly connected to an end of the stainless steel branch pipe (20) away from the gas collecting main pipe (10), and the copper pipe (40) being used for connecting to the heat exchanger.

5. The gas collecting pipe assembly according to claim 4, characterized in that: The stainless steel branch pipe (20) has a bend, the copper pipe (40) has a bend, and the stainless steel branch pipe (20) and the copper pipe (40) form a U-shaped pipe; or, The stainless steel branch pipe (20) has two bends, the copper pipe (40) has no bends, and the stainless steel branch pipe (20) and the copper pipe (40) form a U-shaped pipe.

6. The gas collecting pipe assembly according to claim 4, characterized in that: The side wall of the gas collecting main pipe (10) has a flanged hole, one end of the stainless steel branch pipe (20) is inserted into the flanged hole and welded to the inner wall of the flanged hole, and the other end of the stainless steel branch pipe (20) is plugged into and welded to the copper pipe (40); and / or one end of the copper branch pipe (30) is inserted into the flanged hole and welded to the inner wall of the flanged hole.

7. The gas collecting pipe assembly according to claim 1, characterized in that: The side wall of the gas collecting main pipe (10) has a plurality of flanged holes; One end of the stainless steel branch pipe (20) is inserted into the corresponding flange hole and welded to the inner wall of the flange hole, and the welding depth of the two is ≥1.5 mm; One end of the copper branch pipe (30) is inserted into the corresponding flanging hole and welded to the inner wall of the flanging hole, and the welding depth of the two is ≥1.5 mm.

8. The gas collecting pipe assembly according to claim 1, characterized in that: The stainless steel branch pipe (20) has at least one bend, and the copper branch pipe (30) has at least one bend.

9. The gas collecting pipe assembly according to claim 2, characterized in that: The straight pipe (11) and the bent pipe (12) are both made of stainless steel, and the gas collecting main pipe (10) further comprises a copper joint (13), and the copper joint (13) and one end of the bent pipe (12) are plugged and welded.

10. The gas collecting pipe assembly according to claim 2, characterized in that: The straight pipe (11) and the curved pipe (12) are an integrally formed structure; or, The straight pipe (11) and the curved pipe (12) are separate structures, and the straight pipe (11) and the curved pipe (12) are plugged and welded.

11. A heat exchange component, characterized in that: The heat exchange assembly comprises a heat exchanger and a gas collecting pipe group as claimed in any one of claims 1 to 10, wherein the stainless steel branch pipes (20) and the copper branch pipes (30) in the gas collecting pipe group are respectively welded to the corresponding heat exchange pipes in the heat exchanger.

Images