Heat exchanger flat tube with inner fins and automobile

Abstract

The utility model provides a heat exchanger flat tube with inner fins and an automobile, the heat exchanger flat tube with the inner fins comprises a flat tube shell and the inner fins; the inner fins are installed in the flat pipe shell, the flat pipe shell is formed by folding a piece of material, and a multi-layer wall thickness structure is formed at the front end of the flat pipe shell. The front end is an impact surface of the flat tube shell and external stones; the inner fins are provided with a plurality of bent structures, and the bent positions of the inner fins make contact with the inner wall face of the flat pipe shell. And the end part of the inner fin and the front end of the flat tube shell have or do not have an overlapped part. The front end of the flat tube shell is of a double-layer or three-layer wall thickness structure; and the end parts of the inner fins are positioned or not positioned in an interlayer of the multi-layer wall thickness structure. According to the utility model, a conventional plastic grating is omitted, through the design of multi-layer wall thickness of the flat pipe shell, flying stones on the surface of the water tank impacted by the road surface along with air flow can be resisted, additional material manufacturing and production cost does not need to be increased, and the influence on the overall weight of a vehicle is small.

Description

Technical Field

[0001] The utility model relates to the field of air cooling heat exchanger products, specifically, to a heat exchanger flat tube containing inner fins and an automobile, and especially, to a new energy automobile water tank radiator product and an automobile. Background Art

[0002] New energy vehicles, especially electric vehicles, have strict requirements on the operating temperature range of their power batteries, which in turn puts more stringent requirements on the efficiency of the thermal management of the entire vehicle.

[0003] The radiator, as a key heat exchanger component for heat exchange between coolant and air, has a key impact on the overall heat exchange efficiency and energy consumption level of the vehicle's thermal management system.

[0004] At present, some electric vehicles have cancelled the condenser in front of the water tank. After the cooling air passes through the air intake grille, it directly exchanges heat through the water tank flat tubes and fins. In this solution, since there is no condenser in front to block, foreign objects such as gravel on the road outside will directly hit the water tank flat tubes with the air.

[0005] However, the conventional radiator flat tube has a relatively thin wall and its structure cannot withstand the impact of stones. Therefore, most manufacturers will solve this problem by adding plastic grilles, but this will not only increase the production and installation costs of parts, but also increase the weight of the entire vehicle. Utility Model Content

[0006] In view of the defects in the prior art, the utility model aims to provide a flat tube of a heat exchanger containing inner fins.

[0007] According to the utility model, a heat exchanger flat tube with inner fins includes a flat tube shell and inner fins;

[0008] The inner fin is installed in the flat tube shell, which is folded from a piece of material and forms a multi-layer wall thickness structure at the front end; the front end is the impact surface of the flat tube shell and the external stones;

[0009] The inner fin has a bending structure, the number of the bending structures is multiple, and the bending part of the inner fin contacts the inner wall surface of the flat tube shell; the end of the inner fin has or does not have an overlapping part with the front end of the flat tube shell.

[0010] Preferably, the inner fins are of a sinusoidal structure.

[0011] Preferably, the inner fins are of rectangular wave-shaped structure.

[0012] Preferably, the inner fins are of a trapezoidal wave structure.

[0013] Preferably, the inner fins are of a triangular wave-shaped structure.

[0014] Preferably, the inner fins are of a Z-shaped wave structure.

[0015] Preferably, the front end of the flat tube shell is a double-walled structure;

[0016] or

[0017] The front end of the flat tube shell is a three-layer wall thickness structure.

[0018] Preferably, the end of the inner fin is located in the sandwich layer of the double-wall thickness structure.

[0019] Preferably, the end of the inner fin is located in the sandwich layer of the three-layer wall thickness structure.

[0020] According to an automobile provided by the present invention, the flat tube of the heat exchanger containing inner fins is adopted.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model omits the plastic grille and can resist flying stones from the road surface that hit the surface of the water tank with the air flow through the multi-layer wall thickness design of the flat tube shell. It does not require additional material production and production costs and has little impact on the overall weight of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the inner fin of the utility model having a sinusoidal structure;

[0026] Figure 3 This is a schematic diagram of the structure of the inner fin of the utility model in which the shape structure is a rectangular wave structure;

[0027] Figure 4 This is a schematic diagram of the structure of the inner fin of the utility model having a triangular wave-shaped structure;

[0028] Figure 5 This is a schematic diagram of the structure of the inner fin of the utility model in which the shape structure is a Z-shaped wave structure;

[0029] Figure 6 This is a schematic diagram of the structure of the front end of the flat tube housing of the utility model having a three-layer wall thickness structure;

[0030] Figure 7This is a schematic diagram of the structure in which the front end of the flat tube shell of the utility model is a three-layer wall thickness structure, and the three-layer wall thickness structure has no overlapping part with the end of the inner fin;

[0031] Figure 8 This is a schematic diagram of the structure in which the front end of the flat tube shell of the utility model is a three-layer wall thickness structure, and the three-layer wall thickness structure has an overlapping portion with the end of the inner fin.

[0032] The figure shows:

[0033]

[0034] DETAILED DESCRIPTION

[0035] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0036] The utility model provides a flat tube of a heat exchanger with inner fins, such as Figure 1-Figure 8 As shown, it includes a flat tube shell 101 and an inner fin 102; in a preferred example, the length range of the flat tube cross section is 10mm-40mm, and the width range of the flat tube cross section is 1mm-5mm;

[0037] The inner fin 102 is installed in the flat tube shell 101, which is folded from a piece of material and forms a multi-layer wall thickness structure at the front end; the front end is the impact surface of the flat tube shell 101 with external stones; in a preferred example, the flat tube shell 101 is folded and formed by aluminum foil raw material, and the aluminum foil is overlapped at one end of the length direction of the flat tube to form a multi-layer wall thickness. The inner fin 102 is folded and formed by aluminum foil, and its wall thickness is less than the wall thickness of the aluminum foil of the flat tube.

[0038] The inner fin 102 has a bending structure, and the number of the bending structures is multiple. The bending part of the inner fin contacts the inner wall surface of the flat tube shell; the end of the inner fin 102 has or does not have an overlapping part with the front end of the flat tube shell 101.

[0039] On the flat tube section of the heat exchanger with inner fins, the flat tube shell 101 completely envelops the inner fins 102. The inner fins have multiple contact points with the inner wall of the flat tube. The two parts are welded into one during the brazing process.

[0040] The inner fin 102 can be of different inner fin shapes and structures, such as Figure 2-Figure 5As shown, it is a sinusoidal structure, a rectangular waveform structure 1021, a trapezoidal waveform structure, a triangular waveform structure 1022 or a Z-shaped waveform structure 1023. The number of bends of the inner fin inside the flat tube shell can be an even number or an odd number. Specifically, the design of inner fins of different shapes is related to the following factors: (1) improving heat transfer efficiency; (2) reducing flow resistance; (3) improving the ability of the flat tube to resist internal pressure; (4) improving the internal welding area and improving the process qualification rate. Since these factors have different requirements for the inner fin structure, in different application scenarios, the inner fin structure can be optimized according to specific needs to meet / balance its specific needs.

[0041] In a preferred embodiment, the front end of the flat tube housing 101 is a double-walled structure 103; Figure 1-Figure 5 As shown, a double-wall thickness structure 103 and an inner fin end portion without overlapping parts may be used, or Figure 6 As shown, the double-wall thickness structure 103 and the inner fin end have overlapping parts, that is, the end of the inner fin 102 is in the interlayer 1031 of the double-wall thickness structure. In other words, the inner fin 102 can extend to different positions in the double-wall thickness at the end of the length of the flat tube, or it can not extend into the double-wall thickness.

[0042] In another preferred embodiment, Figure 7 As shown, the front end of the flat tube housing 101 is a three-layer wall thickness structure 104. In this preferred embodiment, the inner fins can also be different inner fin shape structures. Figure 7 As shown, a structure with three-layer wall thickness structure 104 and no overlapping part with the inner fin end can be adopted, or Figure 8 As shown, a structure with overlapping parts of the double-layer wall thickness structure 103 and the end of the inner fin is adopted, that is, the end of the inner fin 102 is located in the interlayer 1041 of the three-layer wall thickness structure, and specifically, the end of the inner fin 102 is located between the second layer and the third layer of the three-layer wall thickness structure 104. In other words, the inner fin 102 can extend to different positions within the three-layer wall thickness at the end of the length of the flat tube, or may not extend into the three-layer wall thickness.

[0043] The flat tube shell of the utility model can be made of corrosion-resistant materials to ensure the corrosion resistance of the product. And different material thicknesses can be set according to different requirements. The inner fins can choose lighter and thinner material thicknesses according to process requirements to reduce the impact of the inner fins on flow resistance. In a preferred example, the thickness range of the flat tube shell is: 0.15mm-0.3mm; the thickness range of the inner fins is: 0.05-0.1mm. The structure and number of bends of the inner fins of the utility model can be set according to different heat exchange requirements and internal flow resistance requirements. The flat tube shell of the utility model can form a two-layer wall thickness structure or a three-layer wall thickness structure at one end, which can resist the impact of flying stones or other foreign objects splashed from the road surface on the flat tube.

[0044] The utility model forms a flat tube of a heat exchanger with inner fins by installing an inner fin 102 in a flat tube shell 101. Compared with a flat tube without inner fins, in the flat tube without inner fins, only the inner wall of the flat tube shell contacts with the flowing medium and exchanges heat, forming a primary heat exchange surface area. However, it is limited by the shape of the flat tube shell and it is difficult to further increase the heat exchange area. However, as a flat tube with inner fins, in addition to the primary heat exchange surface area that already exists in the flat tube shell itself, the surface area formed by all the inner fins and in contact with the flowing medium is a secondary heat exchange surface area. The secondary heat exchange surface area can improve the overall heat exchange efficiency of the flat tube, and the surface area of ​​the inner fins can be adjusted to a large extent according to demand. Therefore, the utility model improves the heat exchange efficiency of the low-temperature radiator.

[0045] In summary, the utility model proposes a manufacturable water tank flat tube, which can not only improve the heat exchange efficiency of the low-temperature radiator of new energy vehicles, but also resist flying stones from the road surface that hit the water tank surface with the air flow, without the need for additional materials and costs.

[0046] The utility model also provides an automobile, which adopts the flat tube of the heat exchanger containing inner fins.

[0047] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A heat exchanger flat tube with inner fins, characterized in that: It comprises a flat tube shell (101) and inner fins (102); The inner fin (102) is installed in the flat tube shell (101), and the flat tube shell (101) is formed by folding a piece of material and forming a multi-layer wall thickness structure at the front end; the front end is the collision surface of the flat tube shell (101) and external stones; The inner fin (102) has a bending structure, the number of the bending structures is multiple, and the bending part of the inner fin contacts the inner wall surface of the flat tube shell; the end of the inner fin (102) and the front end of the flat tube shell (101) have or do not have an overlapping part.

2. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The inner fin (102) is a sinusoidal structure.

3. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The inner fin (102) is a rectangular wave-shaped structure (1021).

4. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The inner fin (102) is a trapezoidal wave-shaped structure.

5. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The inner fin (102) is a triangular wave-shaped structure (1022).

6. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The inner fin (102) is a Z-shaped wave-shaped structure (1023).

7. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The front end of the flat tube housing (101) is a double-walled structure (103); or The front end of the flat tube housing (101) is a three-layer wall thickness structure (104).

8. The heat exchanger flat tube with inner fins according to claim 1, characterized in that: The end of the inner fin (102) is located in the interlayer (1031) of the double-wall thickness structure.

9. The flat tube of heat exchanger with inner fins according to claim 1, characterized in that: The end of the inner fin (102) is located in the sandwich layer (1041) of the three-layer wall thickness structure.

10. An automobile, characterized in that: A heat exchanger flat tube with inner fins as claimed in any one of claims 1 to 5 is used.

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