Pipe assembly and heat exchanger

Abstract

The utility model relates to a pipe assembly and a heat exchanger, the pipe assembly comprises a first pipe, a first piece and a first channel, the first pipe comprises a first wall and a first cavity, and the wall enclosing the first cavity comprises at least part of the first wall; the first part is at least partially located in the first cavity, the first part has thickness in the first direction, the first direction is the length direction of the first wall, the first cavity comprises a first sub-cavity and a second sub-cavity, and the first sub-cavity and the second sub-cavity are located on the two sides of the first part in the thickness direction respectively; the multiple first channels are located in the first piece, and the first channels communicate with the first sub-cavity and the second sub-cavity. According to the pipe assembly, two-phase refrigerants passing through the pipe assembly can flow more evenly, and therefore abnormal noise generated when the two-phase refrigerants flow is reduced.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a tube assembly and a heat exchanger. Background Art

[0002] When the heat exchanger is used as an evaporator in a refrigeration system, since the refrigerant entering the heat exchanger is in a gas-liquid two-phase state, the gas-liquid separation will cause the two-phase refrigerant to have uneven flow when passing through the inlet pipe. In addition, there is a local enlarged area at the inlet of the heat exchanger where the inlet pipe and the collecting pipe are connected. This local enlarged area will also magnify the uneven flow of the refrigerant. Therefore, during the operation of the heat exchanger, discontinuous and unpleasant audible noises caused by the uneven flow of the refrigerant will often occur. Utility Model Content

[0003] A first aspect of an embodiment of the present application provides a pipe assembly, which can make the flow of a two-phase refrigerant passing through it more uniform, thereby reducing abnormal noise generated when the two-phase refrigerant flows.

[0004] The pipe assembly provided in a first aspect of an embodiment of the present application includes:

[0005] a first tube, the first tube comprising a first wall and a first cavity, the wall enclosing the first cavity comprising at least a portion of the first wall;

[0006] a first piece, the first piece is at least partially located in the first cavity, the first piece has a thickness in a first direction, the first direction is a length direction of the first wall, the first cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity and the second sub-cavity are respectively located on both sides of the first piece along the thickness direction;

[0007] A first channel, wherein the number of the first channels is plural, the first channels are located in the first piece, and the first channels connect the first sub-cavity and the second sub-cavity.

[0008] The beneficial effects of the embodiments of the present application are:

[0009] The tube assembly of the embodiment of the present application includes a first tube, a first piece and a plurality of first channels, the first piece is at least partially located in the first cavity of the first tube and separates the first cavity to form a first sub-cavity and a second sub-cavity, and the plurality of first channels are located in the first piece and connect the first sub-cavity and the second sub-cavity. When the two-phase refrigerant passes through the first tube, the first piece can block the two-phase refrigerant and make it pass through the plurality of first channels. After passing through the plurality of first channels, the refrigerant will be ejected, and the gaseous refrigerant and the liquid refrigerant will mix. The mixed two-phase refrigerant flows more evenly, thereby reducing the abnormal sound generated when the two-phase refrigerant flows.

[0010] A second aspect of an embodiment of the present application provides a heat exchanger, comprising a first header, a second header and a heat exchange tube, wherein the first header and the second header are arranged at intervals, and the heat exchange tube connects the first header and the second header, and the heat exchanger further comprises an interface pipe, wherein the interface pipe connects the first header or the second header, and the interface pipe is the tube assembly provided in the embodiment of the first aspect.

[0011] The beneficial effects of the embodiments of the present application are:

[0012] The heat exchanger of the embodiment of the present application includes the tube assembly provided in the embodiment of the first aspect. Because the tube assembly in the embodiment of the first aspect can reduce the abnormal noise generated when the two-phase refrigerant flows, the abnormal noise generated by the flow of refrigerant during operation of the heat exchanger in the embodiment of the present application is also smaller.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a partial cross-sectional structure of a pipe assembly provided in the present application in a specific embodiment;

[0015] Figure 2 A schematic diagram of the structure of a first channel provided in the present application in a specific embodiment;

[0016] Figure 3 A schematic structural diagram of another specific embodiment of the first channel provided in the present application;

[0017] Figure 4 A schematic diagram comparing the projection areas of the first cavity and the first channel on the first surface provided in the present application;

[0018] Figure 5 A schematic diagram of a partial cross-sectional structure of another specific embodiment of the pipe assembly provided in the present application;

[0019] Figure 6 A schematic diagram of a partial cross-sectional structure of another specific embodiment of the pipe assembly provided in the present application;

[0020] Figure 7 A schematic diagram of a partial cross-sectional structure of another specific embodiment of the pipe assembly provided in the present application;

[0021] Figure 8 A schematic diagram of a partial cross-sectional structure of another specific embodiment of the pipe assembly provided in the present application.

[0022] Figure numerals: first tube 1, first wall 11, first groove 111, first cavity 12, first sub-cavity 121, second sub-cavity 122, first piece 2, first plate 21, first channel 3, first hole 31, second hole 32, first notch 33, first surface 4, second tube 5, second plate 6, first header 7, second header 8, heat exchange tube 9, interface tube 10.

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0024] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0029] An embodiment of the present application provides a tube assembly. This article uses the application of the tube assembly in a heat exchanger as an example to describe the technical solution and technical effects. The heat exchanger in the embodiment of the present application can be a parallel flow heat exchanger or a microchannel heat exchanger, but the specific type of heat exchanger is not limited to the description in this article, and can also be other types of heat exchangers, such as a serpentine tube heat exchanger.

[0030] like Figure 1-8 As shown, a first aspect of an embodiment of the present application provides a tube assembly, which includes a first tube 1, a first piece 2 and a first channel 3, wherein the first tube 1 includes a first wall 11 and a first cavity 12, and the wall enclosing the first cavity 12 includes at least part of the first wall 11; the first piece 2 is at least partially located in the first cavity 12, and the first piece 2 has a thickness in a first direction, and the first direction is the length direction of the first wall 11, and the first cavity 12 includes a first sub-cavity 121 and a second sub-cavity 122, and the first sub-cavity 121 and the second sub-cavity 122 are respectively located on both sides of the first piece 2 along the thickness direction; the number of the first channels 3 is multiple, the first channels 3 are located in the first piece 2, and the first channels 3 connect the first sub-cavity 121 and the second sub-cavity 122.

[0031] In this embodiment, the first wall 11 enclosing the first cavity 12 determines the shape of the first wall 11 and the first cavity 12. For example, the first wall 11 can be a cylindrical structure or a cylindrical structure of other shapes such as a rectangle or a polygon. Correspondingly, the shape of the first cavity 12 is also cylindrical or other shapes enclosed by the first wall 11. Generally speaking, the shape of the first wall 11 and the first cavity 12 is cylindrical.

[0032] It should be noted that the "at least part" of the first piece 2 mentioned in this article being at least partly located in the first cavity 12 should be understood in a broad sense, that is, the first piece 2 can be completely located in the first cavity 12, for example, the outer wall of the entire first piece 2 is fixedly connected to the first wall 11 by welding or other means, so that the entire first piece 2 is completely located in the first cavity 12. In addition, the first piece 2 can also be only partially located in the first cavity 12, and the other part extends out of the first cavity 12 or even the first wall 11. For example, when the first piece 2 is set on the first tube 1 by plugging or other means, the area of ​​the first piece 2 needs to be slightly larger than the cross-section of the first tube 1 to ensure the stable cooperation between the first piece 2 and the first tube 1, that is, the first piece 2 is partially located in the first cavity 12. The specific connection structure of the plug-in will be described in subsequent embodiments.

[0033] In addition, the thickness of the first piece 2 in the length direction of the first wall 11 can be determined according to actual needs, and this article does not make specific restrictions on this. Generally speaking, in order to better circulate the refrigerant, the thickness of the first piece 2 is the thickness of the first wall 11 or slightly greater than the thickness of the first wall 11. The function of the first piece 2 is to physically isolate the first cavity 12, so that the first cavity 12 forms a first sub-cavity 121 and a second sub-cavity 122, and the refrigerant can only circulate through the first channel 3 when flowing from one sub-cavity to another, thereby promoting the mixing of the gas-liquid two-phase refrigerant, and achieving the effect of reducing the abnormal sound generated when the two-phase refrigerant flows.

[0034] In this embodiment, when the two-phase refrigerant passes through the first tube 1, the first member 2 can block the two-phase refrigerant and make it pass through the multiple first channels 3. After passing through the multiple first channels 3, the refrigerant will be ejected, and the gaseous refrigerant and the liquid refrigerant will mix. The mixed two-phase refrigerant flows more evenly, thereby reducing the abnormal sound generated when the two-phase refrigerant flows. It is worth adding that since the two-phase refrigerant can be mixed more evenly after passing through the first channel 3, it is also more conducive to the uniformity of the distribution of the refrigerant after entering the heat exchanger, and the more evenly distributed two-phase refrigerant is conducive to improving the heat exchange efficiency of the heat exchanger when it is used as an evaporator.

[0035] like Figure 2 As shown, in a specific embodiment, the first channel 3 includes a first hole 31, the first hole 31 passes through the first member 2 along the first direction, and / or the first channel 3 includes a second hole 32, the second hole 32 is inclined to the first direction and passes through the first member 2. Similar to the shape of the first cavity 12 described above, the opening shapes of the first hole 31 and the second hole 32 can also be preset according to actual needs, such as circular or polygonal, etc., which is not specifically limited herein, but for the sake of ease of description and understanding, the opening shapes of the first hole 31 and the second hole 32 are illustrated and explained as circular in this application and the drawings of this application.

[0036] In this embodiment, the first channel 3 includes a first hole 31 and / or a second hole 32, the opening direction of the first hole 31 is parallel to the length direction of the first wall 11, and the opening direction of the second hole 32 is inclined to the length direction of the first wall 11. When the refrigerant passes through the second hole 32, the second hole 32 opened at an angle can change the flow direction of part of the refrigerant, so that the part of the refrigerant collides with the refrigerant flowing through the first hole 31 or other second holes 32, thereby promoting the mixing of the vapor refrigerant and the liquid refrigerant. In addition, depending on the different inclination directions of the second hole 32, the refrigerant passing through the second hole 32 may also collide with the inner wall of the first wall 11 to change the flow direction, and then mix with other circulating refrigerants, further improving the uniformity of the mixing of the vapor refrigerant and the liquid refrigerant.

[0037] In addition, the specific setting of parameters such as the number of the first holes 31 and the second holes 32, the flow cross-sectional area, etc. can be determined according to the size of the first tube 1 and the refrigerant flow rate of the heat exchanger, etc., and this document does not make any specific restrictions on this.

[0038] like Figure 3 As shown, in a specific embodiment, the first channel 3 includes a first notch 33, the first notch 33 is located at the edge of the first piece 2, and the first notch 33 penetrates the first piece 2 along the first direction. The first notch 33 in this embodiment has the same function as the first hole 31 and the second hole 32 in the previous embodiment, and the main difference is only the different opening positions, so it is not described in detail herein. However, when the opening requirements of the first channel 3 are large and the gap requirements between adjacent first channels 3 are also large, the first channel 3 can be arranged in a way that the first notch 33 and the first hole 31 / the second hole 32 coexist.

[0039] like Figure 4 As shown, in a specific embodiment, if a surface perpendicular to the first direction and passing through the first cavity 12 is defined as the first surface 4, on the first surface 4, the projection area of ​​the first cavity 12 is defined as S1, and the sum of the projection areas of the plurality of first channels 3 is defined as S2, then S1 and S2 satisfy: 3 / 10≤S2 / S1≤7 / 10.

[0040] As mentioned above, the function of the first channel 3 is to spray the refrigerant flowing through, thereby promoting the mixing of the gas-liquid two-phase refrigerant. It can be understood that the sum of the flow cross-sectional areas of the multiple first channels 3 will affect the spray effect produced. Specifically, when the sum of the projected areas of the multiple first channels 3 on the first surface 4 is too small, it means that the sum of the flow cross-sectional areas of the multiple first channels 3 is also small. At this time, most of the refrigerant will not be able to flow through the first channel 3 in time, resulting in the first piece 2 blocking most of the refrigerant from passing through, affecting the mixing effect of this part of the refrigerant passing through. However, when the sum of the flow cross-sectional areas of the first channel 3 is too large, the first piece 2 has a poor blocking effect on the refrigerant, and the spray effect produced after the refrigerant passes through the first channel 3 cannot meet expectations. Therefore, when S1 and S2 meet: 3 / 10≤S2 / S1≤7 / 10, it can not only meet the circulation requirements of the refrigerant, but also have a good spray effect on the refrigerant, thereby promoting the mixing of the two-phase refrigerant.

[0041] like Figure 5As shown, in a specific embodiment, the first member 2 includes a first plate 21, and the first wall 11 has a radially arranged first groove 111. The first plate 21 can be at least partially inserted into the first groove 111 and located in the first cavity 12, and the first plate 21 is sealed and connected to the first wall 11. The arrangement of the first plate 21 through the first groove 111 can flexibly set the installation position of the first plate 21. For example, the first plate 21 can be installed before the first tube 1 is installed to the heat exchanger, or the first tube 1 can be stopped according to the abnormal sound position after the heat exchanger is running to open the first groove 111 and arrange the first plate 21. When installing, the first plate 21 is inserted into the first groove 111 and the gap between the first plate 21 and the first groove 111 is sealed. The sealing method can be welding such as furnace welding or flame welding, which is not specifically limited in this article.

[0042] like Figure 6 As shown, in a specific embodiment, the number of the first plates 21 is at least two, and at least two first plates 21 are arranged at intervals along the first direction; the length of the first wall 11 is defined as L1, the flow diameter of a first channel 3 is D1, and the shortest distance between two adjacent first plates 21 is L2, then: 15D1<L2≤2 / 3L1.

[0043] Similarly, when the number of first plates 21 is at least two, if the distance between two adjacent first plates 21 is too short, the refrigerant will pass through the second first plate 21 before being fully mixed just after passing through the first first plate 21, so the second first plate 21 cannot achieve the expected mixing effect. However, when the distance between two adjacent first plates 21 is too far, the first plate 21 may be too close to the inlet or outlet of the first tube 1, which will also affect the mixing effect of the two-phase refrigerant. Therefore, when the distance between two adjacent first plates 21 is within the preset range, there is a better refrigerant mixing effect. Generally speaking, because the length of the pipe of the heat exchanger will not be too long, it is sufficient to set two first plates 21 in the first tube 1.

[0044] like Figure 6 As shown, in a specific embodiment, along the first direction, at least part of the first channel 3 of one first plate 21 is staggered with at least part of the first channel 3 of another adjacent first plate 21. The first channels 3 of the two staggered first plates 21 are conducive to the circulation and mixing of the refrigerant, thereby further improving the mixing effect of the refrigerant.

[0045] like Figure 7As shown, in a specific embodiment, the tube assembly also includes a second tube 5, the second tube 5 is connected to the first tube 1, at least one second plate 6 is arranged in the tube cavity of the second tube 5, the second plate 6 includes a plurality of third holes, and the third holes penetrate the second plate 6 along the thickness direction of the second plate 6. When the tube assembly is a curved tube, a mixing effect can be achieved by arranging the second plate 6 in the second tube 5. The role played by the second plate 6 and the third holes is the same as that of the first piece 2 and the first channel 3 in the above embodiment, so they are not described one by one in this article. It should be noted that the first piece 2 in the first tube 1 and the second plate 6 in the second tube 5 can exist separately or simultaneously. When they exist simultaneously, the mixing effect is better, which can be determined according to actual usage requirements.

[0046] like Figure 8 As shown, the second aspect of the embodiment of the present application provides a heat exchanger, which includes a first header 7, a second header 8 and a heat exchange tube 9. The first header 7 and the second header 8 are arranged at intervals, and the heat exchange tube 9 connects the first header 7 and the second header 8. The heat exchanger also includes an interface pipe 10, which connects the first header 7 or the second header 8. The interface pipe 10 is a pipe assembly provided in the embodiment of the first aspect.

[0047] The heat exchanger in the embodiment of the present application may be a microchannel heat exchanger. When the heat exchanger is a microchannel heat exchanger, the heat exchange tube 9 is a microchannel flat tube. Since the heat exchanger in the embodiment of the present application includes the tube assembly provided in the embodiment of the first aspect, and since the tube assembly in the embodiment of the first aspect can reduce the abnormal sound generated when the two-phase refrigerant flows, the abnormal sound generated by the refrigerant flowing in the heat exchanger in the embodiment of the present application during operation is also smaller.

[0048] In a specific embodiment, the first header 7 or the second header 8 has a first opening, and the tube assembly is partially inserted into the first opening and fixedly connected to the first header 7 or the second header 8. In addition, the heat exchanger further includes a fin, which is arranged between at least two adjacent heat exchange tubes 9. The heat exchange tube 9 can be a round tube or a microchannel flat tube. Correspondingly, the fin can also be a corrugated fin or a horizontally inserted sheet fin, etc., which is not specifically limited herein.

[0049] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pipe assembly, characterized in that: include: A first tube (1), the first tube (1) comprising a first wall (11) and a first cavity (12), the wall enclosing the first cavity (12) comprising at least a portion of the first wall (11); a first piece (2), the first piece (2) being at least partially located in the first cavity (12), the first piece (2) having a thickness in a first direction, the first direction being a length direction of the first wall (11), the first cavity (12) comprising a first sub-cavity (121) and a second sub-cavity (122), the first sub-cavity (121) and the second sub-cavity (122) being respectively located on two sides of the first piece (2) along the thickness direction; A first channel (3), the number of the first channels (3) is plural, the first channels (3) are located in the first piece (2), and the first channels (3) are connected to the first sub-cavity (121) and the second sub-cavity (122).

2. The pipe assembly according to claim 1, characterized in that The first channel (3) comprises a first hole (31), the first hole (31) passes through the first piece (2) along the first direction, and / or the first channel (3) comprises a second hole (32), the second hole (32) is inclined to the first direction and passes through the first piece (2).

3. The pipe assembly according to claim 1 or 2, characterized in that The first channel (3) comprises a first notch (33), the first notch (33) is located at the edge of the first piece (2), and the first notch (33) penetrates the first piece (2) along the first direction.

4. The pipe assembly according to claim 1 or 2, characterized in that: A surface perpendicular to the first direction and passing through the first cavity (12) is defined as a first surface (4). On the first surface (4), a projection area of ​​the first cavity (12) is defined as S1. The sum of the projection areas of the plurality of first channels (3) is defined as S2. Then, S1 and S2 satisfy: 3 / 10≤S2 / S1≤7 / 10.

5. The pipe assembly according to claim 4, characterized in that The first member (2) comprises a first plate (21), the first wall (11) having a radially arranged first groove (111), the first plate (21) being capable of being at least partially inserted into the first groove (111) and being located in the first cavity (12), and the first plate (21) being sealingly connected to the first wall (11).

6. The pipe assembly according to claim 5, characterized in that The number of the first plates (21) is at least two, and at least two of the first plates (21) are arranged at intervals along the first direction; Define the length of the first wall (11) as L1, the flow diameter of one of the first channels (3) as D1, and the shortest distance between two adjacent first plates (21) as L2, then: 15D1<L2≤2 / 3L1.

7. The pipe assembly according to claim 6, characterized in that Along the first direction, at least a portion of the first channel (3) of one first plate (21) is arranged in a staggered manner with at least a portion of the first channel (3) of another adjacent first plate (21).

8. The pipe assembly according to any one of claims 1 or 2 or 5-7, characterized in that: The tube assembly further comprises a second tube (5), the second tube (5) being connected to the first tube (1), at least one second plate (6) being arranged in the tube cavity of the second tube (5), the second plate (6) comprising a plurality of third holes, the third holes penetrating the second plate (6) along the thickness direction of the second plate (6).

9. A heat exchanger, comprising a first header (7), a second header (8) and a heat exchange tube (9), wherein the first header (7) and the second header (8) are arranged at intervals, and the heat exchange tube (9) connects the first header (7) and the second header (8), characterized in that: It also comprises an interface pipe (10), wherein the interface pipe (10) is connected to the first header (7) or the second header (8), and the interface pipe (10) is a pipe assembly according to any one of claims 1 to 8.

10. The heat exchanger according to claim 9, characterized in that The first header (7) or the second header (8) has a first opening, and the tube assembly is partially inserted into the first opening and fixedly connected to the first header (7) or the second header (8).

Images