Heat exchanger and refrigerating system

Abstract

The utility model relates to a heat exchanger and a refrigerating system, the heat exchanger comprises a collecting pipe and a plurality of flat pipes, the axial direction of the collecting pipe is defined as a first direction, and a surface perpendicular to the first direction is a first surface; a flow collecting cavity is formed in the flow collecting pipe, the multiple flat pipes sequentially penetrate through one side of the flow collecting pipe at intervals in the first direction, the ends of the flat pipes extend into the flow collecting cavity and communicate with the flow collecting cavity, an inlet communicating with the flow collecting cavity is formed in the first end of the flow collecting pipe, and the inlet can guide and limit the position of a refrigerant entering the flow collecting cavity; due to the fact that the orthographic projection of the inlet on the first face in the first direction and the orthographic projection of the end, located in the flow collecting pipe, of the flat pipe on the first face in the first direction are arranged in a staggered mode, a refrigerant cannot impact the flat pipe in the flow collecting cavity when entering the flow collecting cavity from the inlet, and flowing of the refrigerant is stabilized; the refrigerant can more easily flow to the end part, far away from the inlet, of the flow collecting cavity, so that the refrigerant is more uniformly distributed in the plurality of flat pipes, and the heat exchange performance of the heat exchanger is further optimized.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration systems, and in particular to a heat exchanger and refrigeration system. Background Technology

[0002] Existing heat exchangers include a manifold and multiple flat tubes. The manifold has multiple insertion holes spaced apart along its length. The flat tubes are inserted into these insertion holes and extend into the cavity of the manifold from their respective insertion holes. In other words, at least a portion of the flat tubes is located inside the manifold. When refrigerant enters the manifold from its first end, some of the refrigerant directly impacts the side wall of the flat tube near the first end, hindering the refrigerant's distribution within the manifold. This results in unstable refrigerant flow within the manifold, leading to uneven refrigerant distribution and reducing the heat exchanger's efficiency. Utility Model Content

[0003] Therefore, it is necessary to provide a heat exchanger and refrigeration system that prevents the refrigerant from impacting the flat tube.

[0004] A heat exchanger includes a manifold and a plurality of flat tubes, wherein the axial direction of the manifold is defined as a first direction, and a surface perpendicular to the first direction is defined as a first surface;

[0005] The manifold is provided with a manifold cavity, and a plurality of flat tubes are sequentially spaced along the first direction on one side of the manifold, with the ends of the flat tubes extending into the manifold cavity, and the flat tubes communicating with the manifold cavity;

[0006] The first end of the manifold is provided with an inlet that communicates with the manifold cavity. The orthographic projection of the inlet along the first direction on the first surface and the orthographic projection of the end of the flat tube located inside the manifold along the first direction on the first surface are staggered.

[0007] In one embodiment, the manifold includes a pipe body and a connecting seat coaxially arranged with the pipe body. The first end of the pipe body has an opening communicating with the manifold cavity. The connecting seat is disposed at the opening of the pipe body, and the connecting seat includes a connecting plate that covers the opening. The inlet is opened on the connecting plate.

[0008] In one embodiment, the connecting plate has a protrusion located beside the inlet on the plate surface facing the collection cavity, and the protrusion extends toward the flat tube along the first direction.

[0009] In one embodiment, the end of the flat tube located inside the manifold is defined as the first end, and a notch corresponding to the inlet is provided on the first end of the flat tube, and the inlet is connected to the notch.

[0010] In one embodiment, the orthogonal projection of the protrusion onto the flat tube along the first direction is located at the edge of the notch.

[0011] In one embodiment, the end of the flat tube located within the manifold is defined as the first end.

[0012] The connecting plate has a protrusion extending along the first direction toward the flat tube. A liquid flow channel is formed on the side of the protrusion away from the flat tube. The inlet is opened on the side wall of the protrusion and communicates with the liquid flow channel. In the length direction of the flat tube, the outlet end of the inlet is located outside the first end.

[0013] In one embodiment, the two sidewalls of the inlet arranged circumferentially along the protrusion are both defined as first sidewalls, the intersection of the two first sidewalls and the inner peripheral wall of the protrusion is defined as the first point, and the included angle formed by the line connecting the two first points and the center of the protrusion is α, where 3° ≤ α ≤ 90°.

[0014] Alternatively, the number of inlets is at least two, and they are arranged at intervals along the circumference of the protrusion. The sidewalls of the first and last inlets facing away from each other are defined as first sidewalls. The intersection of the two first sidewalls and the inner circumferential wall of the protrusion is defined as the first point. The angle formed by the line connecting the two first points and the center of the protrusion is α, where 3°≤α≤90°.

[0015] In one embodiment, the number of inlets is at least two, and they are arranged at circumferential intervals along the protrusion. The first and last inlets are defined as the first inlet and the second inlet, respectively. The angle between the centerline of the first inlet and the centerline of the second inlet is β, where 15° ≤ β ≤ 70°.

[0016] In one embodiment, the flat tube closest to the connector is defined as the first flat tube, the first direction is defined as the up-down direction, the connector is located on the top of the manifold, and the height of the protrusion is L1, 0 mm. <L1≤7mm;

[0017] Furthermore, the distance between the top surface of the protrusion and the first flat tube is L2, 0mm < (L2 - L1) ≤ 2mm.

[0018] In one embodiment, the heat exchanger further includes a connecting pipe, and the connecting plate has an annular plate with a ring-shaped cross-section on the side opposite to the pipe body. The annular plate extends along the first direction in a direction opposite to the pipe body. The connecting pipe is mounted on the annular plate and is connected to the inlet.

[0019] And / or, the periphery of the connecting plate is provided with an annular wall extending in a first direction, the annular wall being located outside the protrusion, and the wall of the manifold being constrained between the protrusion and the annular wall.

[0020] This application also provides a refrigeration system including a heat exchanger as described in any of the preceding embodiments.

[0021] Compared with existing technologies, the heat exchanger provided in this application defines the axial direction of the manifold as the first direction and the surface perpendicular to the first direction as the first surface. By setting an inlet connected to the manifold cavity at the first end of the manifold, the inlet can guide and restrict the position of the refrigerant entering the manifold cavity. Since the orthographic projection of the inlet along the first direction on the first surface and the orthographic projection of the end of the flat tube inside the manifold along the first direction on the first surface are staggered, that is, the projections of the inlet and the flat tube inserted into the manifold cavity in the first direction do not overlap, so that the refrigerant does not directly collide with the flat tube inside the manifold cavity when it enters the manifold cavity from the inlet. Furthermore, since the refrigerant does not collide with the flat tube, the flow of the refrigerant is more stable, and the refrigerant can flow more easily to the end of the manifold cavity away from the inlet, thereby making the distribution of the refrigerant in the multiple flat tubes more uniform, and thus optimizing the heat exchanger's heat exchange performance. In addition, the more stable flow of the refrigerant can reduce the oscillation or turbulence of the refrigerant in the manifold cavity, thereby improving the operational stability of the heat exchanger. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of a heat exchanger according to an embodiment of this application;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 This is a perspective view of a connector according to an embodiment of this application;

[0026] Figure 4 for Figure 3 Cross-sectional view at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the connector from another perspective in one embodiment of this application;

[0028] Figure 6This is a partial cross-sectional view of a heat exchanger according to an embodiment of this application;

[0029] Figure 7 This is a partial cross-sectional view of the notch between the protrusion and the flat tube in one embodiment of this application;

[0030] Figure 8 This is a partial cross-sectional view of the protrusion and the notch of the flat tube from another angle according to an embodiment of this application;

[0031] Figure 9 This is a perspective view of a connector according to another embodiment of this application;

[0032] Figure 10 This is a schematic diagram of the connector from another perspective in another embodiment of this application;

[0033] Figure 11 for Figure 10 Cross-sectional view at point A in the middle;

[0034] Figure 12 for Figure 10 Cross-sectional view at point B in the middle;

[0035] Figure 13 This is a schematic diagram illustrating the import process in other embodiments of this application;

[0036] Figure 14 This is a partial cross-sectional view of the heat exchanger in other embodiments of this application;

[0037] Figure 15 This is a perspective view of a connector according to another embodiment of this application;

[0038] Figure 16 for Figure 15 Cross-sectional view at point A in the middle.

[0039] Figure label:

[0040] 10. Manifold; 101. Manifold cavity; 102. Inlet; 1021. First inlet; 1022. Second inlet; 110. Pipe body; 120. Connecting seat; 121. Connecting plate; 1211. First plate; 1212. Second plate; 122. Protrusion; 1221. First sidewall; 123. Annular plate; 124. Annular wall; 1201. Liquid passage; 20. Flat tube; 21. First flat tube; 201. Notch; 30. Connecting pipe. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0046] Please see Figures 1 to 16This application provides a heat exchanger, which includes a manifold 10 and a plurality of flat tubes 20. The axial direction of the manifold 10 is defined as a first direction B, and the surface perpendicular to the first direction B is defined as a first surface. A manifold cavity 101 is provided inside the manifold 10. The plurality of flat tubes 20 are sequentially spaced along the first direction and pass through one side of the manifold 10. The ends of the flat tubes 20 extend into the manifold cavity 101 and communicate with the manifold cavity 101. The first end of the manifold 10 is provided with an inlet 102 that communicates with the manifold cavity 101. The orthographic projection of the inlet 102 along the first direction on the first surface and the orthographic projection of the ends of the flat tubes 20 located in the manifold 10 along the first direction on the first surface are staggered.

[0047] Understandably, the inlet 102 guides and restricts the refrigerant's entry into the manifold 101. Since the projection of the inlet 102 along the first direction onto the first surface and the projection of the flat tube 20 inside the manifold 10 along the first direction onto the first surface are staggered, meaning the projections of the inlet 102 and the flat tube 20 inserted into the manifold 101 in the first direction do not overlap, the refrigerant entering the manifold 101 from the inlet 102 will not directly impact the flat tube 20 inside the manifold 101. Furthermore, because the refrigerant will not directly impact the flat tube 20, the refrigerant flow is more stable, allowing it to flow more easily to the end of the manifold 101 away from the inlet 102. This results in a more uniform distribution of the refrigerant among the multiple flat tubes 20, thereby optimizing the heat exchanger's heat exchange performance. In addition, the more stable refrigerant flow reduces oscillations or turbulence within the manifold 101, thus improving the heat exchanger's operational stability.

[0048] It should also be noted that the end of the flat tube 20 located inside the manifold 10 is defined as the first end.

[0049] It is also understandable that, since the first end of the flat tube 20 extends into the collecting cavity 101, the projection of the inlet 102 and the first end of the flat tube 20 inserted into the collecting cavity 101 in the first direction does not overlap in the circumferential direction of the collecting cavity 101. In other words, the first end of the collecting tube 10 is also provided with a flow-limiting structure that blocks the first end of the flat tube 20, such as... Figure 3The connecting plate 121 in the middle protects the first end of the flat tube 20 from refrigerant impact. In other words, the inlet 102 can distribute the refrigerant, ensuring it flows only at the inlet 102 at the first end of the tube body 110, directing it towards the manifold 101 away from the first end of the flat tube 20, i.e., towards the outer side of the first end of the flat tube 20. Thus, the inlet 102 facilitates refrigerant distribution, accelerates refrigerant flow, and improves heat exchange efficiency. It should be noted that this "distribution" does not mean the refrigerant is evenly distributed among multiple flat tubes 20, but rather that the refrigerant flows into the manifold 101 only from the inlet 102 in the circumferential direction, thereby distributing the refrigerant flow position circumferentially at the first end of the manifold 10.

[0050] In this embodiment, see Figure 6 and Figure 7 The first end of the flat tube 20 has a notch 201 corresponding to the inlet 102. In this case, the refrigerant will not impact the first end of the flat tube 20 when flowing into the manifold 101 from the inlet 102. In other embodiments, the first end of the flat tube may also be rectangular or arc-shaped corresponding to the inner wall of the manifold 10. That is, in other embodiments, the first end of the flat tube does not have a notch. This application does not limit the specific shape of the first end of the flat tube, as long as the refrigerant does not impact the first end of the flat tube 20 when flowing into the manifold 101 from the inlet 102.

[0051] In one embodiment, see Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8 The manifold 10 includes a tube body 110 and a connecting seat 120 coaxially arranged with the tube body 110. The first end of the tube body 110 has an opening communicating with the collecting cavity 101. The connecting seat 120 is disposed at the opening of the tube body 110 and includes a connecting plate 121 covering the opening. An inlet 102 is formed on the connecting plate 121. The manifold 10 is composed of the tube body 110 and the connecting seat 120. The separate production of the tube body 110 and the connecting seat 120 is simpler, thus improving the production efficiency of the manifold 10. Furthermore, the connecting seat 120 can be adjusted according to the structure of the first end of the flat tube 20, thereby improving the flexibility and customization of the heat exchanger.

[0052] It should be noted that the area on the connecting plate 121 without an opening is the aforementioned flow-limiting structure.

[0053] Further, see Figure 6The connecting plate 121 is sealed to the end wall of the first end of the pipe body 110 to prevent refrigerant valve leakage. The pipe body 110 can be a pipe with a circular, square, elliptical, or other cross-sectional shapes. The pipe body 110 can also be formed by connecting multiple coaxially arranged pipe segments in sequence. This application does not limit this, as long as the connecting plate 121 can cover the opening at the first end of the pipe body 110.

[0054] In one embodiment, see Figure 3 , Figure 4 , Figure 5 and Figure 6 A protrusion 122 is provided on the surface of the connecting plate 121 facing the manifold 101, located beside the inlet 102. The protrusion 122 extends in the direction of the flat tube 20 along the first direction. It can be understood that the refrigerant can flow along the inner wall of the protrusion 122, so that the protrusion 122 can guide and restrict the flow range of the refrigerant in the manifold 101, so that the refrigerant only flows at the inlet 102 at the first end of the tube body 110. The refrigerant flows towards the first end of the manifold 101 away from the flat tube 20. That is to say, the refrigerant flows towards the outside of the first end of the flat tube 20. In this way, not only can the refrigerant be further prevented from hitting the first end of the flat tube 20, but the liquid separation effect of the inlet 102 can also be optimized.

[0055] In one embodiment, the orthographic projection of the protrusion 122 along the first direction onto the flat tube 20 is located at the edge of the notch 201. Thus, when the refrigerant enters the manifold 101 of the manifold 10 from the inlet 102, under the guiding effect of the protrusion 122, the refrigerant will flow to the notch 201 of the flat tube 20 without impacting the tube body of the flat tube 20, thereby further preventing the refrigerant from impacting the first end of the flat tube 20, and further optimizing the liquid distribution effect of the inlet 102.

[0056] In this embodiment, refer to Figure 5 The inlet 102 is fan-shaped, which is more suitable for the manifold 10 with a circular cross-section, and can maximize the flow area of ​​the inlet 102 under the same size constraints. In other embodiments, the inlet 102 can also be circular, triangular or rectangular, as long as the orthographic projection of the inlet 102 along the first direction on the first surface and the orthographic projection of the first end of the flat tube 20 along the first direction on the first surface are staggered. This application does not impose any restrictions on this.

[0057] It should be noted that, for reference Figure 3In this embodiment, the inlet 102 is fan-shaped and is surrounded by two flat sidewalls and an arc-shaped wall. The protrusion 122 is located on the side of the two flat sidewalls of the inlet 102. In this way, the refrigerant can be guided to flow in the manifold 101, and the weight of the connector 120 can be reduced, thereby reducing the pressure on the connector 120 as the manifold 10.

[0058] Further, see Figure 4 and Figure 6 The heat exchanger also includes a connecting pipe 30. An annular plate 123 with a ring-shaped cross-section is provided on the side of the connecting plate 121 facing away from the tube body 110. The annular plate 123 extends in a first direction away from the tube body 110. The inner cavity formed by the annular plate 123 corresponds to the inlet 102. The connecting pipe 30 is mounted on the annular plate 123 and is connected to the manifold 101 through the inlet 102. It is understood that the refrigerant enters the manifold 101 within the manifold 10 through the connecting pipe 30, and then flows from the manifold 101 into each flat tube 20. The connecting pipe 30 is mounted on the connecting seat 120 via the annular plate 123, thus enabling it to connect to the manifold 101 of the manifold 10 through the inlet 102. This prevents refrigerant leakage between the connecting pipe 30 and the manifold 10.

[0059] In this embodiment, the annular plate 123 is sleeved on the outside of the connecting pipe 30 and is sealed to the connecting pipe 30, thus preventing refrigerant leakage from the connection between the annular plate 123 and the connecting pipe 30. Furthermore, the end wall of the connecting pipe 30 near the connecting plate 121 overlaps with the connecting plate 121, and the connecting plate 121 can limit the movement of the connecting pipe 30.

[0060] In one embodiment, see Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16The end of the flat tube 20 located inside the manifold 10 is defined as the first end. A portion of the connecting plate 121 extends along the first direction toward the flat tube 20 to form a protrusion 122. A liquid flow channel 1201 is formed on the side of the protrusion 122 away from the flat tube 20. An inlet 102 is opened on the side wall of the protrusion 122 and is connected to the liquid flow channel 1201. In the length direction of the flat tube 20, the outlet end of the inlet 102 is located outside the first end, that is, the opening direction of the inlet 102 is consistent with the length direction of the flat tube 20, and the inlet 102 penetrates the side wall of the protrusion 122. Similarly, the refrigerant can flow along the inner wall of the protrusion 122, allowing the protrusion 122 to guide and restrict the flow of the refrigerant in the liquid passage 1201. Since the inlet 102 is located on the side wall of the protrusion 122, the refrigerant can flow towards the first end of the flat tube 20 in the collection chamber 101, that is, the refrigerant flows towards the outside of the first end of the flat tube 20. In this way, the refrigerant can be further prevented from hitting the first end of the flat tube 20, and the liquid separation effect of the inlet 102 can be optimized to improve the heat exchange performance of the heat exchanger.

[0061] It should be noted that, in this embodiment, refer to Figure 9 and Figure 11 The connecting plate 121 includes a first plate 1211, a protrusion 122, and a second plate 1212 coaxially arranged along a first direction. The first plate 1211 is provided with a clearance hole. The inner peripheral wall of the clearance hole of the first plate 1211, the inner peripheral wall of the protrusion 122, and the side wall of the second plate 1212 near the first plate 1211 together form a liquid flow channel 1201. The inner peripheral edge of the first plate 1211 and the outer peripheral edge of the second plate 1212 are respectively connected to the two ends of the protrusion 122. The protrusion 122 and the second plate 1212 are both located in the collection cavity 101. The end wall of the first end of the collection pipe 10 abuts against the side of the first plate 1211 near the second plate 1212, and the end wall of the first end of the collection pipe 10 is sealed to the first plate 1211 to prevent refrigerant leakage.

[0062] Furthermore, the distance between the inlet 102 and the inner wall of the manifold 10 is 1mm to 4mm. This prevents the distance between the inlet 102 and the inner wall of the manifold 10 from being too close, avoiding impact of the refrigerant on the inner wall of the manifold 10. Illustratively, the distance between the inlet 102 and the inner wall of the manifold 10 can also be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, or any other value within the range of 1mm to 4mm.

[0063] In one embodiment, see Figure 12The notch 201 at the first end of the flat tube 20 has an included angle of 90 degrees between the two sidewalls arranged circumferentially along the protrusion 122. The two sidewalls arranged circumferentially along the protrusion 122 of the inlet 102 are defined as the first sidewalls 1221. The intersection of the two first sidewalls 1221 with the inner circumferential wall of the protrusion 122 is defined as the first point. The two first points of the inlet 102 on the inner circumferential wall of the protrusion 122 are the first point C and the first point D. The line connecting the first point C and the center O of the protrusion 122 is OC, and the line connecting the first point D and the center O of the protrusion 122 is OD. The included angle between the line OC and the line OD is α, and the value of α ranges from 3° to 90°. In this way, the opening of the inlet 102 can avoid the notch 201 of the flat tube 20, thereby preventing the refrigerant from impacting the flat tube 20 when flowing from the inlet 102 to the manifold 101.

[0064] It is understood that the inlet 102 can be a circular hole or an arc-shaped hole, and this application does not limit it, as long as the included angle between the two first sidewalls 1221 is between 3° and 90°. Illustratively, the included angle between the two first sidewalls 1221 can also be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, or any other value within the range of 3° to 90°.

[0065] Furthermore, the two first sidewalls 1221 are arranged in parallel to simplify the processing method. The two first sidewalls 1221 can also be set at a certain angle to control the flow of refrigerant. This application does not limit this, as long as the refrigerant can flow from the liquid passage 1201 through the opening 102 to the collection cavity 101.

[0066] In one embodiment, see Figure 14 There are at least two inlets 102, and multiple inlets 102 are arranged at intervals along the circumference of the protrusion 122. At this time, the sidewalls of the first and last inlets 102 facing away from each other are defined as first sidewalls 1221, and the intersection of the two first sidewalls 1221 with the inner circumferential wall of the protrusion 122 is defined as the first point. The two first points of the inlet 102 on the inner circumferential wall of the protrusion 122 are the first point C and the first point D, respectively. The line connecting the first point C and the center O of the protrusion 122 is OC, and the line connecting the first point D and the center O of the protrusion 122 is OD. The angle between the line connecting OC and the line connecting OD is also α, and the value of α is also in the range of 3° to 90°. In this way, the opening of the inlet 102 can avoid the tube body of the flat tube 20, so that the refrigerant flows towards the notch 201 of the flat tube 20, thereby preventing the refrigerant from hitting the flat tube 20 when it flows from the inlet 102 to the collector cavity 101.

[0067] In one embodiment, see Figure 15and Figure 16 There are at least two inlets 102, arranged circumferentially around the protrusion 122. The first and last inlets 102 are defined as the first inlet 1021 and the second inlet 1022, respectively. The angle between the centerline of the first inlet 1021 and the centerline of the second inlet 1022 is β, where 15° ≤ β ≤ 70°. Thus, when the refrigerant flows into the manifold 101 from the inlets 102, the inlets 102 can guide and restrict the flow of the refrigerant, causing it to converge towards the notch 201 at the first end of the flat tube 20. This not only facilitates refrigerant distribution but also prevents the refrigerant from impacting the flat tube 20.

[0068] Schematic, the angle β between the centerline of the first inlet 1021 and the centerline of the second inlet 1022 can also be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, or any other value within the range of 15° ≤ β ≤ 70°.

[0069] Furthermore, the heat exchanger also includes a connecting pipe 30. An annular plate 123 with a ring-shaped cross-section is provided on the side of the connecting plate 121 facing away from the tube body 110. The annular plate 123 extends along a first direction away from the tube body 110. The inner cavity formed by the annular plate 123 corresponds to the inlet 102. The connecting pipe 30 is mounted on the annular plate 123 and is connected to the liquid flow channel 1201. The connecting pipe 30 is connected to the manifold 101 through the liquid flow channel 1201 and the inlet 102. It can be understood that the refrigerant enters the manifold 101 within the manifold 10 through the connecting pipe 30, and then flows from the manifold 101 into each flat tube 20. The connecting pipe 30 is mounted on the connecting seat 120 via the annular plate 123, thus enabling it to connect to the manifold 101 of the manifold 10 through the inlet 102. This prevents refrigerant leakage between the connecting pipe 30 and the manifold 10.

[0070] In this embodiment, the annular plate 123 is sleeved on the outside of the connecting pipe 30 and is sealed to the connecting pipe 30, thus preventing refrigerant leakage from the connection between the annular plate 123 and the connecting pipe 30. Furthermore, the end wall of the connecting pipe 30 near the connecting plate 121 overlaps with the connecting plate 121, and the connecting plate 121 can limit the movement of the connecting pipe 30.

[0071] In one embodiment, the flat tube 20 closest to the connection base 120 is defined as the first flat tube 21, the first direction is defined as the up-and-down direction, the connection base 120 is provided at the top of the header 10, and the height of the convex portion 122 is L2, where 0 mm < L2 ≤ 7 mm. Thus, the distance between the first surface of the connection plate 121 and the first surface of the convex portion 122 is prevented from affecting the liquid separation of the refrigerant. Schematically, L2 is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, or any other value within the range of 0 mm < L2 ≤ 7 mm.

[0072] Furthermore, the distance between the top surface of the convex portion 122 and the first flat tube 21 is L2, and 0 mm < (L2 - L1) ≤ 2 mm. That is to say, the distance between the bottom surface of the convex portion 122 and the first flat tube 21 is 0 mm to 2 mm. Thus, it can effectively prevent the gap between the convex portion 122 and the first flat tube 21 from being too large, and further avoid being unfavorable for the liquid separation of the refrigerant. Schematically, L2 is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, or any other value within the range of 0 mm < L1 ≤ 7 mm.

[0073] In one embodiment, a ring wall 124 extending in the first direction is provided on the periphery of the connection plate 121. The ring wall 124 is located outside the convex portion 122, and the tube wall of the header 10 is constrained between the convex portion 122 and the ring wall 124. Thus, the connection base 120 can limit the position of the header 10 through the connection plate 121, the convex portion 122 and the ring wall 124.

[0074] The present application also proposes a refrigeration system, including the heat exchanger in any one of the above embodiments.

[0075] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0076] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A heat exchanger, characterized in that, It includes a manifold (10) and a plurality of flat tubes (20), the axial direction of the manifold (10) is defined as a first direction, and the surface perpendicular to the first direction is defined as a first surface; The manifold (10) is provided with a manifold cavity (101), and a plurality of flat tubes (20) are sequentially spaced along the first direction and pass through one side of the manifold (10), and the ends of the flat tubes (20) extend into the manifold cavity (101), and the flat tubes (20) are connected to the manifold cavity (101); The first end of the manifold (10) is provided with an inlet (102) that communicates with the manifold cavity (101). The orthographic projection of the inlet (102) on the first surface along the first direction and the orthographic projection of the end of the flat tube (20) located in the manifold (10) on the first surface along the first direction are staggered.

2. The heat exchanger according to claim 1, characterized in that, The manifold (10) includes a pipe body (110) and a connecting seat (120) arranged coaxially with the pipe body (110). The first end of the pipe body (110) has an opening communicating with the manifold cavity (101). The connecting seat (120) is disposed at the opening of the pipe body (110), and the connecting seat (120) includes a connecting plate (121) covering the opening. The inlet (102) is opened on the connecting plate (121).

3. The heat exchanger according to claim 2, characterized in that, The connecting plate (121) has a protrusion (122) on the plate surface facing the collection cavity (101) located next to the inlet (102), and the protrusion (122) extends along the first direction toward the flat tube (20).

4. The heat exchanger according to claim 3, characterized in that, The end of the flat tube (20) located inside the manifold (10) is defined as the first end. A notch (201) corresponding to the inlet (102) is opened on the first end of the flat tube (20). The inlet (102) is connected to the notch (201).

5. The heat exchanger according to claim 4, characterized in that, The orthographic projection of the protrusion (122) onto the flat tube (20) along the first direction is located at the edge of the notch (201).

6. The heat exchanger according to claim 2, characterized in that, The end of the flat tube (20) located inside the manifold (10) is defined as the first end. A portion of the connecting plate (121) extends along the first direction toward the flat tube (20) and forms a protrusion (122). A liquid flow channel (1201) is formed on the side of the protrusion (122) away from the flat tube (20). The inlet (102) is opened on the side wall of the protrusion (122) and communicates with the liquid flow channel (1201). In the length direction of the flat tube (20), the outlet end of the inlet (102) is located outside the first end.

7. The heat exchanger according to claim 6, characterized in that, The two sidewalls of the inlet (102) arranged circumferentially along the protrusion (122) are both defined as the first sidewall (1221). The intersection of the first sidewall (1221) and the inner circumferential wall of the protrusion (122) is defined as the first point. The angle formed by the lines connecting the two first points and the center of the protrusion (122) is α, where 3° ≤ α ≤ 90°. Alternatively, the number of inlets (102) is at least two, and they are arranged at intervals along the circumference of the protrusion (122). The sidewalls of the first and last inlets (102) facing away from each other are defined as first sidewalls (1221). The intersection of the two first sidewalls (1221) with the inner circumferential wall of the protrusion (122) is defined as the first point. The angle formed by the line connecting the two first points and the center of the protrusion (122) is α, where 3° ≤ α ≤ 90°.

8. The heat exchanger according to claim 6, characterized in that, The number of inlets (102) is at least two, and they are arranged at circumferential intervals along the protrusion (122). The first and last inlets (102) are defined as the first inlet (1021) and the second inlet (1022), respectively. The angle between the center line of the first inlet (1021) and the center line of the second inlet (1022) is β, where 15° ≤ β ≤ 70°.

9. The heat exchanger according to claim 3 or 6, characterized in that, The flat tube (20) closest to the connector (120) is defined as the first flat tube (21), the first direction is defined as the up-down direction, the connector (120) is located on the top of the manifold (10), and the height of the protrusion (122) is L1, 0 mm. <L1≤7mm; Furthermore, the distance between the top surface of the protrusion (122) and the first flat tube (21) is L2, 0mm < (L2 - L1) ≤ 2mm.

10. The heat exchanger according to any one of claims 3 to 9, characterized in that, The heat exchanger also includes a connecting pipe (30), and the connecting plate (121) is provided with an annular plate (123) with a ring-shaped cross-section on the side away from the tube body (110). The annular plate (123) extends along the first direction away from the tube body (110). The connecting pipe (30) is installed on the annular plate (123) and is connected to the inlet (102). And / or, the periphery of the connecting plate (121) is provided with an annular wall (124) extending in a first direction, the annular wall (124) being located outside the protrusion (122), and the wall of the manifold (10) being constrained between the protrusion (122) and the annular wall (124).

11. A refrigeration system, characterized in that, Includes the heat exchanger as described in any one of claims 1 to 10.

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