Automobile radiator heat pipe

Abstract

The present invention discloses an automotive radiator heat pipe comprising three or four channels, with each pair of adjacent channels separated by a pair of hourglass ribs. In each channel, two or more rows of concave point groups are arranged on the two pipe walls along the flow direction of the pipe. Each row of concave point groups consists of a plurality of interspaced concave points located in two perpendicular rows of concave point groups on the two pipe walls. A concave point in one row of concave point groups is located between two adjacent concave points in the other row of concave point groups, unless the concave point is located at an end. The present invention has improved high-temperature and pressure resistance and higher heat dissipation efficiency.

Description

Technical Field

[0001] The invention relates to an automobile water tank radiator pipe, belonging to the technical field of automobiles. Background Art

[0002] Automobile radiator heat pipe is a special radiator for automobiles, mainly used as a radiator for trucks, buses, construction machinery, agricultural equipment, etc. In order to solve the heat dissipation problem, the existing technology has provided different technical solutions.

[0003] For example, application number 201220694543.4 discloses a single hourglass double-tube heat pipe. The middle portion of each side of the heat pipe (1) is provided with an inwardly directed concave band (2). The top ends of the two concave bands (2) are connected together to divide the heat pipe (1) into an upper double tube and a lower double tube (3). The cross-sectional shape of the junction of the upper double tube and the lower double tube (3) is hourglass-shaped. The cross-sectional wall thickness h1 of the heat pipe is 0.30 mm to 0.35 mm, the width h2 of the heat pipe is 32 mm to 36 mm, and the thickness h3 of the heat pipe is 1.6 mm to 1.9 mm. While meeting the heat dissipation capacity requirements of a relatively high-power engine, the structural strength and pressure bearing strength are increased, and the pressure bearing strength can reach 350 kPa. At the same time, the use of the heat pipe of the utility model can realize industrialized production and improve production efficiency by about 30%. The low-carbon and environmental protection advocated by the state is achieved during the manufacturing process and the use process, thereby extending the service life of the product.

[0004] Another example: Application No. 201520313762.7 discloses a novel automobile radiator heat pipe, comprising a hollow pipe (1), wherein the inner wall of the pipe (1) is provided with a plurality of protrusions (2), wherein the plurality of protrusions (2) form two protrusion arrays that are symmetrical in the upper and lower directions or symmetrical in the left and right directions, and the two protrusion arrays are staggered. Water flowing into the pipe forms a trickle due to the obstruction of the protrusions, and tumbles up and down during the flow, and the heat dissipation area increases exponentially, thereby ensuring that the high-temperature water is fully dissipated inside, and greatly improving the heat dissipation performance of the water tank.

[0005] Building on the single hourglass dual-tube heat dissipation approach, 201520313762.7 proposed staggering the bump array within the hollow tube to increase the heat dissipation area. However, this approach lacked sufficient resistance to high-temperature pressure pulses and exhibited unsatisfactory heat dissipation efficiency. Summary of the Invention

[0006] In order to overcome the above difficulties, our company organized a research and development team to discuss and finally decided to design a car radiator heat pipe.

[0007] To achieve the above-mentioned object, the technical means adopted by the present invention are: a car radiator heat pipe, consisting of three channels or four channels, each two adjacent channels are divided by a pair of hourglass concave ribs, in each channel, two or more rows of concave point groups are arranged on the two pipe walls along the flow direction of the pipe, each row of concave point groups is composed of a plurality of concave points arranged at intervals and respectively located in two mutually perpendicular rows of concave point groups on the two pipe walls, wherein a concave point in one row of concave point groups is located between two adjacent concave points in the other row of concave point groups, unless the concave point is located at the end.

[0008] Furthermore, the concave point is an ellipse, or an oblong structure composed of a rectangle and arcs arranged at both ends of the long side of the rectangle, and the central axis of the ellipse or oblong structure has an angle with the flow direction of the pipeline.

[0009] Furthermore, the angle is 35° to 55°.

[0010] Furthermore, the two mutually perpendicular groups of concave points on the two pipe walls are arranged in opposite directions. When the liquid flows through the two corresponding groups of concave points, the direction of the water flow will be changed to form a spiral liquid flow. The directions of the concave points of two or more rows of concave point groups are opposite, so that the liquid flow in each channel spirals forward in two or more streams in a clockwise and counterclockwise direction respectively, forming sufficient turbulence of the liquid in the pipe and better dissipating heat to the outside.

[0011] Furthermore, there are three channels, and two columns of concave point groups are arranged in each channel.

[0012] Furthermore, in the three channels, the distances between the two groups of concave points in each channel are equal or unequal.

[0013] Furthermore, in two adjacent groups of pits located in an independent channel, the pits in one group are in opposite directions to the pits in the corresponding other group.

[0014] Furthermore, the distance between the central axes of two adjacent rows of concave point groups is 5 to 6.5 mm.

[0015] Furthermore, the distance between one end of the concave point located at the end of the concave point group and the edge of the channel is not less than 12 mm.

[0016] Furthermore, in two mutually perpendicular rows of concave point groups located on two sides of the pipe walls, a concave point in one row of the concave point group is located between two adjacent concave points in the other row of the concave point group.

[0017] The beneficial effects of the present invention are: better high temperature pressure resistance and higher heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the hourglass concave rib of the present invention;

[0021] Figure 3 This is a diagram of the fluid situation in a channel simulated by CFD of the present invention.

[0022] In the figure: 1, channel, 2, hourglass concave rib, 3, concave point group, 4, concave point. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figure 1 The automobile water tank heat dissipation pipe shown in the figure is composed of three channels 1, and each two adjacent channels 1 are connected by a pair of hourglass concave ribs 2 ( Figure 2 In each channel 1, two rows of concave point groups 3 are arranged on the two pipe walls along the flow direction of the pipe. Each row of concave point groups 3 is composed of a plurality of concave points 4 arranged at intervals and located in two rows of concave point groups perpendicular to each other on the two pipe walls. A concave point 4 in one row of concave point groups (solid thick line) is located between two adjacent concave points 4 in the other row of concave point groups (dashed thin line), unless the concave point 4 is located at the end.

[0025] In contrast tests, when the concave points are not arranged in columns, or are arranged in columns but the positions of the concave points in the upper and lower columns on the cross section coincide, the desired spoiler effect will not be produced.

[0026] The concave point 4 is an ellipse, or an oblong structure composed of a rectangle and arcs arranged at both ends of the long side of the rectangle, and the central axis of the ellipse or oblong structure has an angle with the flow direction of the pipeline.

[0027] The angle is 35° to 55°, and 45° is selected in this embodiment.

[0028] like Figure 3 As shown, the concave points of the two mutually perpendicular concave point groups on the two pipe walls are set in opposite directions. When the liquid flows through the two corresponding concave points of the upper and lower groups, the direction of the water flow will be changed to form a spiral liquid flow. The concave points of two or more rows of concave point groups are in opposite directions, so that the liquid flow in each channel spirals forward in two or more streams in a clockwise and counterclockwise direction respectively, forming a sufficient turbulent flow of the liquid in the pipe and better dissipating heat to the outside.

[0029] Among the three channels, the distances between the two groups of concave points in the two outer channels are equal, and the distances between the two groups of concave points in the middle channel are not equal.

[0030] This embodiment divides the heat dissipation pipe into three channels, and the durability of each channel against high temperature pressure is improved.

[0031] Example 2

[0032] As a further design of Example 1, in two adjacent groups of pits located in an independent channel, the pits in one group are in opposite directions to the pits in the corresponding other group.

[0033] In the spirally advancing liquid, one group advances in a counterclockwise spiral and the other group advances in a clockwise spiral. Turbulence is formed in the area between the two groups of spirals, making the disturbance more sufficient.

[0034] The distance between the center axes of two adjacent rows of concave point groups is 5 to 6.5 mm. This data is designed to take into account the welding rate between the heat pipe and the heat dissipation belt. If the number of rows is too close, there will be too many cold welds between the concave points and the belt, which will affect the strength and heat dissipation performance of the product.

[0035] The distance between one end of the concave point in the concave point group and the edge of the channel is no less than 12 mm. During radiator processing, the end of the heat pipe needs to be inserted into the radiator main plate and welded to the main plate. Concave points at the contact point with the main plate will cause poor welding and leakage. Therefore, this distance needs to be limited.

[0036] In two perpendicular rows of concave points on two pipe walls, a concave point in one row is positioned between two adjacent concave points in the other row. When liquid flows through the concave points on the front and back sides of the pipe walls, the different positions of the concave points guide the water flow into a spiral, effectively disturbing the flow.

[0037] For this embodiment, a comparative test was conducted to compare the heat dissipation performance of the finished radiators made of three-channel tubes with and without pit groups. The performance of the radiator with the pit group was improved by 3 to 5% compared with the radiator without the pit group.

[0038] The performance comparison data is as follows:

[0039]

[0040]

[0041] Example 3

[0042] An automobile radiator heat pipe is composed of four channels. Three rows of concave point groups are arranged in each channel, and the distances between two groups of concave point groups in each channel are unequal.

[0043] It can be seen from the experiments in the above embodiments that the structural design of the present invention has better high temperature and pressure resistance performance and higher heat dissipation efficiency.

[0044] Although the above describes and illustrates the specific embodiments of the present invention in detail, it should be pointed out that we can make various equivalent changes and modifications to the above embodiments based on the concept of the present invention. As long as the functional effects produced do not exceed the spirit covered by the specification, they should all be within the scope of protection of the present invention.

Claims

1. An automobile radiator heat pipe, characterized by: The invention comprises three or four channels, wherein each two adjacent channels are divided by a pair of hourglass ribs. In each channel, two or more rows of concave point groups are arranged on the two pipe walls along the flow direction of the pipe. Each row of concave point groups is composed of a plurality of concave points arranged at intervals and are respectively located in two perpendicular rows of concave point groups on the two pipe walls. A concave point in one row of concave point groups is located between two adjacent concave points in the other row of concave point groups, unless the concave point is located at an end. The concave point is an ellipse, or an oblong structure composed of a rectangle and an arc arranged at both ends of the long side of the rectangle, and the central axis of the ellipse or oblong structure has an angle with the flow direction of the pipe. There are three channels, and two rows of concave point groups are arranged in each channel. In two adjacent rows of the concave point groups in each channel, the concave points in one group are in opposite directions to the concave points in the corresponding other group. The distance between the central axes of the two adjacent rows of concave point groups is 5 to 6.5 mm. The distance between one end of the concave point located at the end of the concave point group and the edge of the channel is not less than 12 mm.

2. The automobile radiator heat pipe according to claim 1, characterized in that: The angle is 35° to 55°.

3. The automobile radiator heat pipe according to claim 1, characterized in that: The concave points of the two mutually perpendicular concave point groups on the two pipe walls are set in opposite directions. When the liquid flows through the two corresponding concave points of the upper and lower groups, the direction of the water flow will be changed to form a spiral liquid flow. The concave points of two or more rows of concave point groups are in opposite directions, so that the liquid flow in each channel spirals in two or more streams in clockwise and counterclockwise directions respectively, forming sufficient turbulence of the liquid in the pipeline and better dissipating heat to the outside.

4. The automobile radiator heat pipe according to claim 1, characterized in that: In the three channels, the distances between the two columns of pit groups in each channel are equal or different.

5. The automobile radiator heat pipe according to claim 1, characterized in that: In two mutually perpendicular rows of concave point groups located on two sides of the pipe walls, a concave point in one row of the concave point group is located between two adjacent concave points in the other row of the concave point group.

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