End cover, flow collecting assembly and heat exchanger

Abstract

The utility model relates to an end cover, a flow collecting assembly and a heat exchanger. The end cover has an axial direction and a radial direction; the peripheral wall of the end cover is used for being inserted into the inner wall of the end part of the collecting pipe, and the end cover has an axial direction and a radial direction; the end cover is provided with a first end part and a second end part along the axial direction; the size of the peripheral wall of the end cover in the radial direction is gradually increased from the first end to the second end in the axial direction, the peripheral wall of the first end is used for being in clearance fit with the collecting pipe, and the peripheral wall of the second end is used for being in interference fit with the collecting pipe or abutting against the end face of a pipe opening of the collecting pipe. The first end part is in clearance fit with the collecting pipe so as to avoid difficulty in initial assembly; and the second end part is in interference fit with the collecting pipe, so that the end cover can form an axial limiting function through the second end part during assembly, and the end cover cannot slide towards the interior of the collecting pipe to generate inward sinking. In conclusion, through cooperation of the first end portion and the second end portion, rapid assembly of the end cover is promoted, assembly inward sinking is avoided, assembly is simpler and more reliable, and efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to an end cover, a current collecting assembly and a heat exchanger. Background Art

[0002] In existing heat exchangers, end caps are stamped and formed using a die, while manifolds are fabricated by high-frequency welding of sheet metal. After the manifolds and end caps are fabricated, they are typically inserted into the manifolds and brazed together. However, these manufacturing processes and current manufacturing capabilities have limitations, resulting in manufacturing tolerances on both the end caps and manifolds. This can lead to overlapping dimensional tolerances, resulting in an interference fit or an overly loose fit, making assembly of the end caps and manifolds difficult. Utility Model Content

[0003] Based on this, it is necessary to provide an end cover to reduce or avoid the difficulty in assembling the end cover and the header.

[0004] An end cover, wherein the outer peripheral wall of the end cover is used to be inserted into the inner wall of the end of a collecting pipe, and the end cover has an axial direction and a radial direction; the end cover is provided with a first end and a second end along the axial direction; the dimension of the outer peripheral wall of the end cover along the radial direction gradually increases from the first end toward the second end along the axial direction, the outer peripheral wall of the first end is used to have a clearance fit with the collecting pipe, and the outer peripheral wall of the second end is used to have an interference fit with the collecting pipe or abut against the end face of the pipe mouth of the collecting pipe.

[0005] It is understandable that during assembly, the first end portion is inserted into the manifold first relative to the second end portion. The smaller size of the first end portion enables better assembly positioning and insertion into the manifold. The first end portion and the manifold are clearance-fitted to avoid difficulties in initial assembly. Furthermore, the interference fit of the second end portion and the manifold facilitates the axial limiting effect of the end cap through the second end portion during assembly, thereby preventing the end cap from sliding into the manifold and causing indentation. In summary, the cooperation between the first end portion and the second end portion promotes rapid assembly of the end cap and avoids indentation during assembly, making assembly simpler and more reliable and improving efficiency.

[0006] In one embodiment, a tight-fitting structure is protruded from the outer peripheral wall of the end cover along the radial direction, and the tight-fitting structure is at least partially located at the second end. The dimension of the tight-fitting structure along the radial direction gradually increases from the first end toward the second end, and the tight-fitting structure is used to interference fit with the collecting pipe.

[0007] In one embodiment, the tight-fitting structure is extended along the axial direction, and the size of the tight-fitting structure along the circumference of the end cover gradually increases from the first end toward the second end.

[0008] In one embodiment, the tight-fitting structure is configured as a curved surface along the radially outward surface.

[0009] In one embodiment, there are multiple tight-fitting structures, and the multiple tight-fitting structures are spaced apart along the circumference of the end cover.

[0010] In one embodiment, the circumferential outer surface of the outer peripheral wall of the end cover gradually expands from the first end toward the second end, and the circumferential outer surface near at least the second end is used for interference fit with the circumferential inner wall of the end of the collecting pipe.

[0011] In one embodiment, the minimum radial dimension of the outer peripheral wall is The included angle between the outer peripheral wall and the axis of the end cover is E, 0.3°≤E≤3°.

[0012] In one embodiment, the end cover is provided with a flange protruding outward at the second end portion, and the flange is used to abut against the end surface of the manifold orifice.

[0013] The present application also provides a collecting assembly, including a collecting tube and the above-mentioned end cover, wherein the collecting tube is constructed with an inner chamfer at the end face of the pipe mouth; the end cover is inserted into the inner wall of the end of the collecting tube, and the flange of the end cover abuts against the inner chamfer.

[0014] The present application also provides a heat exchanger, comprising the above-mentioned collecting assembly; and / or the above-mentioned end cover, wherein the end cover is inserted into the inner wall of the end of the collecting pipe, and the second end is close to the pipe mouth of the collecting pipe relative to the first end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A perspective view of a first embodiment of the end cap provided in this application;

[0017] Figure 2 A top view of a first embodiment of the end cap provided in this application;

[0018] Figure 3 A perspective view of a second embodiment of the end cap provided in this application;

[0019] Figure 4 A front view of a second embodiment of the end cap provided in this application;

[0020] Figure 5 A cross-sectional view of a third embodiment of the end cap provided in this application;

[0021] Figure 6 A cross-sectional view of the current collecting assembly provided for this application;

[0022] Figure 7 This is a cross-sectional view of the collecting tube in the collecting assembly provided in this application.

[0023] Reference numerals: 100, end cover; 200, manifold; 2001, inner chamfer; 10, first end portion; 101, composite layer; 20, second end portion; 201, fitting groove; 30, tight-fitting structure; 40, flange. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when a component is referred to as being "fixed to" or "provided on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0026] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0027] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0029] See also Figures 1 to 4 The present application provides an end cap 100, the outer peripheral wall of which is configured to be inserted into the inner wall of the end of a manifold 200. The end cap 100 has an axial direction and a radial direction. The end cap 100 is axially provided with a first end 10 and a second end 20. The radial dimension of the outer peripheral wall of the end cap 100 gradually increases from the first end 10 toward the second end 20. The outer peripheral wall of the first end 10 is configured to have a clearance fit with the manifold 200, while the outer peripheral wall of the second end 20 is configured to have an interference fit with the manifold 200. Thus, during assembly, the first end 10 is first inserted into the manifold 200. Due to the smaller size of the first end 10, insertion is easier, simplifying initial assembly. As the end cover 100 is continuously extended, the end cover 100 gradually fits tightly with the tube wall of the collecting tube 200, with a good transition effect. Since the size of the second end 20 is larger, an interference fit is formed at the second end 20, thereby squeezing the tube wall of the collecting tube 200, promoting tight assembly, and limiting the continued insertion of the end cover 100 to prevent the end cover 100 from being assembled inward, thereby improving assembly reliability.

[0030] like Figure 5 As shown, in other embodiments, the second end portion 20 may also abut against the end surface of the pipe opening of the manifold 200 to form a mutual limit, thereby preventing the end cover 100 from sinking in during assembly.

[0031] In summary, by setting the size of the first end 10 to be smaller than the second end 20, the end cover 100 can be clearance-fitted with the manifold 200 through the first end 10, making the initial assembly easier, and the second end 20 can be interference-fitted with the manifold 200 or abut against the end face of the manifold 200, so that the end cover 100 will not sink inward, thereby ensuring the assembly stability of the end cover 100.

[0032] like Figure 1 and Figure 3 As shown, in a specific embodiment, the first end portion 10 is provided with a composite layer 101. The radial dimension of the composite layer 101 increases axially from the first end portion 10 toward the second end portion 20, resulting in an initially larger gap between the first end portion 10 and the manifold 200. This gap decreases as the assembly progresses. Furthermore, the surface of the composite layer 101 is coated with solder. After the end cap 100 is assembled into the manifold 200, the two are furnace-welded. During the furnace welding process, the solder melts at high temperatures to fill the gap between the first end portion 10 and the wall of the manifold 200, ensuring a secure assembly.

[0033] More specifically, a smooth transition is provided between the outer peripheral wall where the composite layer 101 is located and the end face to reduce stress concentration and collision damage during assembly.

[0034] like Figure 1 、 Figure 3 and Figure 5 As shown, in a specific embodiment, the end cover 100 is provided with an axially recessed mating groove 201 at the end surface of the second end portion 20. The mating groove 201 can cooperate with the operating tool, and at the same time, it is also beneficial to reduce material loss and lower production costs.

[0035] This application provides three embodiments of the end cover 100 , but the configuration of the end cover 100 is not limited to these three methods.

[0036] like Figure 1 and Figure 2 As shown, in the first embodiment, a tight-fitting structure 30 is radially protruded from the outer circumferential wall of the end cap 100. The tight-fitting structure 30 is at least partially located at the second end 20 and is configured to achieve an interference fit with the manifold 200. This structure compresses the wall of the manifold 200, securing the end cap 100 and the manifold 200. In this case, the maximum radial dimension of the end cap 100 is the maximum radial dimension H1 at the location of the tight-fitting structure 30.

[0037] like Figure 1As shown, further, the radial dimension of the tight-fitting structure 30 gradually increases from the first end 10 toward the second end 20, that is, the fit between the tight-fitting structure 30 and the wall of the collecting pipe 200 gradually becomes tighter from the first end 10 toward the second end 20 until obvious extrusion occurs, forming an interference fit. This arrangement has a better transition effect and is conducive to reducing stress concentration.

[0038] like Figure 1 As shown, further, the tight-fitting structure 30 is extended in the axial direction, and the circumferential size of the tight-fitting structure 30 along the end cover 100 gradually increases from the first end 10 toward the second end 20, so that the tight-fitting area of ​​the tight-fitting structure 30 assembled with the collecting pipe 200 in the circumferential direction gradually increases along the first end 10 toward the second end 20, which can also form a good transition effect and reduce stress concentration.

[0039] like Figure 1 and Figure 2 As shown, in a further embodiment, there are multiple tight-fitting structures 30, and the multiple tight-fitting structures 30 are distributed circumferentially along the end cover 100. The multiple assembly structures can jointly extrude the tube wall of the collecting pipe 200 to form an extrusion effect in multiple directions, which is beneficial to the dispersion of stress, and the setting of multiple assembly structures is also beneficial to improving assembly reliability.

[0040] like Figure 1 and Figure 2 As shown, in a specific embodiment, a plurality of tight-fitting structures 30 are arranged opposite to each other in the radial direction of the end cover 100, so that when the second end 20 is interference-fitted through the tight-fitting structure 30, the force distribution is more uniform, and the extrusion effect on the collecting pipe 200 is symmetrical along the radial direction, which is conducive to reducing stress concentration.

[0041] like Figure 1 As shown, in a specific embodiment, the radially outward surface of the tight-fitting structure 30 is configured as a curved surface to promote uniform stress distribution and reduce stress concentration. For example, the radial projection of the tight-fitting structure 30 can be configured as a cone, triangle, or trapezoid, etc., which are only examples here.

[0042] like Figure 3 and Figure 4 As shown, in the second embodiment, the circumferential outer surface of the outer wall of the end cap 100 gradually expands from the first end 10 toward the second end 20. At least the circumferential outer surface near the second end 20 is configured to form an interference fit with the circumferential inner wall of the end of the manifold 200. That is, the outer wall of the end cap 100 forms an inclined surface inclined relative to the axis. In this case, the maximum radial dimension of the end cap 100 is H2. This arrangement ensures a clearance fit followed by an interference fit when assembled with the manifold 200. It also simplifies the structure and facilitates machining. The provision of a circumferential outer surface helps reduce stress concentration.

[0043] like Figure 4 As shown, in a specific embodiment, the minimum radial dimension of the outer peripheral wall is The angle E between the outer peripheral wall and the axis of the end cap 100 is 0.3°≤E≤3°. This arrangement facilitates proper compression between the end cap 100 and the wall of the manifold 200, avoiding excessively large outer peripheral wall inclination angles that could hinder assembly. For example, E = 0.3°, 1°, or 3°.

[0044] like Figure 5 As shown, in the third embodiment, the end cover 100 is provided with a flange 40 protruding outward at the second end 20, and the flange 40 is used to abut the end face of the pipe mouth of the collecting pipe 200, so as to form an axial limit with the end face of the pipe mouth of the collecting pipe 200, thereby preventing the end cover 100 from sinking during assembly.

[0045] like Figure 6 and Figure 7 As shown, the present application also provides a collecting assembly, including a collecting pipe 200 and an end cover 100. The collecting pipe 200 is constructed with an inner chamfer 2001 at the end face of the pipe mouth; the end cover 100 is inserted into the collecting pipe 200, and the flange 40 of the end cover 100 abuts against the inner chamfer 2001. In this way, the flange 40 cooperates with the inner chamfer 2001 to form a limit along the axial direction of the end cover 100, thereby preventing the end cover 100 from sinking in during assembly. At the same time, the flange 40 and the inner chamfer 2001 can also form a limit in the radial direction, increase the contact area, and reduce assembly shaking. In addition, the setting of the inner chamfer 2001 also has a guiding effect on the assembly of the end cover 100, making the assembly smoother.

[0046] In a specific embodiment, the inclination angle of the inner chamfer 2001 can be set to be between 30° and 60° to form an effective limit and assembly guide function. Exemplarily, the inclination angle of the inner chamfer 2001 is 30°, 45° or 60°.

[0047] In some embodiments, the manifold 200 is made of aluminum, which has good thermal conductivity and corrosion resistance, and is suitable for transporting a variety of fluids.

[0048] The present application also provides a heat exchanger, including a collecting pipe 200 and the above-mentioned end cover 100, the end cover 100 is inserted into the inner wall of the end of the collecting pipe 200, and the second end 20 is close to the pipe mouth of the collecting pipe 200 relative to the first end 10, so as to reduce the difficulty of assembly by the clearance fit between the first end 10 and the collecting pipe 200, and the second end 20 is interference fit with the collecting pipe 200 or abuts against the pipe mouth of the collecting pipe 200 to form a reliable assembly and enhance the sealing.

[0049] The heat exchanger also includes a plurality of heat exchange tubes, which are connected to form a winding heat exchange tube group. The inlet and outlet of each heat exchange tube group are respectively connected to the corresponding collecting pipe 200. The collecting pipe at the inlet can realize the diversion of the fluid, and the collecting pipe 200 at the outlet is conducive to the re-convergence and transportation of the fluid.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An end cap, wherein the outer peripheral wall of the end cap is used to be inserted into the inner wall of the end of the collecting pipe, characterized in that: The end cover has an axial direction and a radial direction; the end cover is provided with a first end portion (10) and a second end portion (20) along the axial direction; the size of the outer peripheral wall of the end cover along the radial direction gradually increases from the first end portion (10) toward the second end portion (20) along the axial direction, the outer peripheral wall of the first end portion (10) is used for clearance fit with the collecting pipe, and the outer peripheral wall of the second end portion (20) is used for interference fit with the collecting pipe or abutting against the end face of the pipe mouth of the collecting pipe.

2. The end cap according to claim 1, wherein: The outer peripheral wall of the end cover is provided with a tight-fitting structure (30) along the radial direction. The tight-fitting structure (30) is at least partially located at the second end portion (20). The dimension of the tight-fitting structure (30) along the radial direction gradually increases from the first end portion (10) toward the second end portion (20). The tight-fitting structure (30) is used for interference fit with the collecting pipe.

3. The end cap according to claim 2, wherein: The tight-fitting structure (30) is extended along the axial direction, and the size of the tight-fitting structure (30) along the circumference of the end cover gradually increases from the first end portion (10) toward the second end portion (20).

4. The end cap according to claim 2, wherein: The tight-fitting structure (30) is configured as a curved surface along the radially outward surface.

5. The end cap according to any one of claims 2 to 4, characterized in that: There are a plurality of the tight-fitting structures (30), and the tight-fitting structures (30) are distributed at intervals along the circumference of the end cover.

6. The end cap according to claim 1, wherein: From the first end (10) toward the second end (20), the circumferential outer surface of the outer peripheral wall of the end cover gradually expands, and the circumferential outer surface at least near the second end (20) is used for interference fit with the circumferential inner wall of the end of the collecting pipe.

7. The end cap according to claim 6, wherein: The minimum radial dimension of the outer peripheral wall is The included angle between the outer peripheral wall and the axis of the end cover is E, 0.3°≤E≤3°.

8. The end cap according to claim 1, wherein: The end cover is provided with a flange (40) protruding outwards at the second end portion (20), and the flange (40) is used to abut against the end surface of the manifold orifice.

9. A current collecting assembly, characterized in that: include: A collecting pipe (200), wherein the collecting pipe (200) is configured with an inner chamfer (2001) at the end surface of the pipe opening; The end cover (100) according to any one of claims 1 to 8 is inserted into the inner wall of the end of the collecting pipe (200), and the flange (40) of the end cover (100) abuts against the inner chamfer (2001).

10. A heat exchanger, characterized in that: include: The current collecting assembly according to claim 9; and / or, The end cover (100) according to any one of claims 1 to 8, wherein the end cover (100) is inserted into the inner wall of the end of the collecting pipe (200), and the second end (20) is close to the pipe mouth of the collecting pipe (200) relative to the first end (10).

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