Connecting aluminum pipe for evaporator of automobile air conditioner

Abstract

The utility model discloses an automobile air conditioner evaporator connecting aluminum pipe which comprises an outer pipe and an inner pipe which are connected through a sealing ring. The inner pipe comprises a first straight pipe section, a reducing section and a second straight pipe section, the reducing section is connected with the first straight pipe section and the second straight pipe section, and the section diameter of the second straight pipe section is smaller than that of the first straight pipe section; a supporting piece is arranged in the second straight pipe section, and a flow dividing channel is formed between the supporting piece and the second straight pipe section. The heat exchange tube is novel in design, stable in structure, high in heat exchange efficiency when a refrigerant flows in the tube, and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporator pipelines, in particular to an aluminum tube connected to an evaporator of an automobile air conditioner. Background Art

[0002] The automobile air-conditioning system mainly includes a compressor, a condenser, a dryer, an expansion valve and an evaporator. The various components are connected by aluminum tubes and high-pressure rubber tubes. The function of the aluminum tube is to transport gaseous refrigerant.

[0003] The existing aluminum tube has the following defects during use: when the refrigerant flows in the aluminum tube, the flow rate is low, which easily causes the heat exchange efficiency to become low, thereby affecting the refrigeration effect. The existing patent document (Announcement No.: CN205505823U) discloses "an aluminum tube for evaporator", which also has the above technical problems. Summary of the invention

[0004] The utility model aims to solve the above-mentioned technical problems existing in the prior art and provides an aluminum tube for connecting an automobile air-conditioning evaporator, which has a novel design, a stable structure, high heat exchange efficiency when the refrigerant flows in the tube, and strong practicality.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The aluminum tube for connecting the evaporator of the automobile air conditioner comprises: an outer tube and an inner tube, and the outer tube and the inner tube are connected by a sealing ring; the characteristics are: the inner tube comprises a first straight tube section, a diameter reducing section and a second straight tube section, the diameter reducing section connects the first straight tube section and the second straight tube section, and the cross-sectional diameter of the second straight tube section is smaller than the cross-sectional diameter of the first straight tube section; a support is arranged in the second straight tube section, and a flow diversion channel is formed between the support and the second straight tube section. The aluminum tube has a novel design, a stable structure, high heat exchange efficiency when the refrigerant flows in the tube, and strong practicality.

[0007] Furthermore, spiral reinforcing ribs are wrapped and fixed around the outer tube, which improves the surface structural strength of the outer tube, makes it resistant to pressure and collision, is not easy to deform, and has a long service life.

[0008] Furthermore, teeth are distributed around the inner wall of the first straight pipe section, which increases the heat conduction area and thus improves the heat exchange effect.

[0009] Furthermore, threaded fins are arranged at intervals on the outer wall of the inner tube and the inner wall of the outer tube, thereby improving the heat exchange efficiency.

[0010] Furthermore, the threaded fins are spot-welded to the inner tube and the outer tube, which ensures reliable fixation and improves the installation strength of the threaded fins.

[0011] Furthermore, the outer wall of the outer tube is coated with a high temperature resistant layer, which can be formed by coating with phosphate lead powder paint, thereby improving the heat resistance of the outer tube, thereby adapting to the high temperature conditions in the vehicle and extending the service life.

[0012] Furthermore, the inner wall of the inner tube is coated with a galvanized layer, which improves the corrosion resistance of the inner tube, making it less prone to corrosion and rust, and has a long service life.

[0013] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0014] 1. When the refrigerant flows from the first straight pipe section to the second straight pipe section, the flow rate becomes faster, which improves the heat exchange efficiency and can prevent the low-flow refrigerant in the first straight pipe section from vortexing and mixing, thereby affecting the smooth flow in the pipe.

[0015] 2. The support member supports the second straight pipe section and resists its deformation, thereby ensuring the structural stability of the second straight pipe section; the diversion channel diverts the refrigerant, which is conducive to the smooth passage of the refrigerant through the second straight pipe section.

[0016] 3. The setting of spiral reinforcement ribs improves the surface structural strength of the outer tube, making it resistant to pressure and collision, not easy to deform, and has a long service life.

[0017] 4. The setting of the teeth increases the heat conduction area of ​​the first straight pipe section, thereby improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the internal structure of the first embodiment of the present utility model;

[0020] Figure 2 It is a front view of the first embodiment;

[0021] Figure 3 This is a schematic diagram of the external structure of the second embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of Embodiment 2;

[0023] Figure 5 This is the front view of the third embodiment of the present utility model.

[0024] In the figure: 1-outer tube; 2-inner tube; 3-sealing ring; 4-threaded fin; 5-first straight tube section; 6-diameter reducing section; 7-second straight tube section; 8-support member; 9-diversion channel; 10-spiral reinforcement rib; 11-tooth portion. DETAILED DESCRIPTION

[0025] like Figure 1 , Figure 2 As shown, this is an embodiment of the present utility model

[0026] The automobile air-conditioning evaporator is connected with an aluminum tube, comprising an outer tube 1 and an inner tube 2. The outer tube 1 and the inner tube 2 are welded and fixed by a sealing ring 3. The connection is reliable, forming an integral body and having a stable structure.

[0027] The outer wall of the outer tube 1 is coated with a high temperature resistant layer, which can be formed by coating with phosphate lead powder paint, thereby improving the heat resistance of the outer tube 1, thereby adapting to the high temperature conditions in the vehicle and extending the service life. The inner wall of the inner tube 2 is coated with a galvanized layer, which improves the corrosion resistance of the inner tube 2, is not easy to corrode and rust, and has a long service life.

[0028] Threaded fins 4 are arranged at intervals on the outer wall of the inner tube 2 and the inner wall of the outer tube 1, which improves the heat exchange efficiency. The threaded fins 4 are spot-welded to the inner tube 2 and the outer tube 1, which are reliably fixed and improve the installation strength of the threaded fins 4.

[0029] The inner tube 2 includes a first straight tube section 5, a diameter reducing section 6 and a second straight tube section 7. The diameter reducing section 6 connects the first straight tube section 5 and the second straight tube section 7. The cross-sectional diameter of the second straight tube section 7 is smaller than the cross-sectional diameter of the first straight tube section 5. In the process of the refrigerant flowing from the first straight tube section 5 to the second straight tube section 7, the flow velocity becomes faster, the heat exchange efficiency is improved, and the low flow velocity refrigerant in the first straight tube section 5 can be prevented from vortexing and mixing to affect the smoothness of the tube.

[0030] A support member 8 is provided inside the second straight pipe section 7 to support the second straight pipe section 7 and resist deformation thereof, thereby ensuring the structural stability of the second straight pipe section 7 .

[0031] A diversion channel 9 is formed between the support member 8 and the second straight pipe section 7 to divert the refrigerant, thereby facilitating the refrigerant to smoothly pass through the second straight pipe section 7 .

[0032] like Figure 3 , Figure 4 As shown, this is the second embodiment of the utility model

[0033] In the technical solution based on the first embodiment, a spiral reinforcing rib 10 is fixedly wound around the outer tube 1, which improves the surface structural strength of the outer tube 1, makes it resistant to pressure and collision, is not easily deformed, and has a long service life.

[0034] like Figure 5 As shown, this is the third embodiment of the present utility model

[0035] In the technical solution based on the first embodiment, teeth 11 are distributed around the inner wall of the first straight pipe section 5, which increases the heat conduction area and thus improves the heat exchange effect. The teeth 11 are in the shape of an isosceles trapezoid and have a stable structure.

[0036] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the utility model to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the utility model.

Claims

1. Automobile air conditioner evaporator connecting aluminum tube, including: An outer tube and an inner tube, wherein the outer tube and the inner tube are connected via a sealing ring; Features: The inner tube comprises a first straight tube section, a diameter-reducing section and a second straight tube section, the diameter-reducing section connects the first straight tube section and the second straight tube section, and the cross-sectional diameter of the second straight tube section is smaller than the cross-sectional diameter of the first straight tube section; A support is provided in the second straight pipe section, and a flow dividing channel is formed between the support and the second straight pipe section.

2. The automobile air-conditioning evaporator connecting aluminum tube according to claim 1, characterized in that: A spiral reinforcement rib is fixedly wound around the outer tube.

3. The automobile air-conditioning evaporator connecting aluminum tube according to claim 1, characterized in that: The inner wall of the first straight pipe section is surrounded by teeth.

4. The automobile air-conditioning evaporator connecting aluminum tube according to claim 1, characterized in that: Threaded fins are arranged at intervals on the outer wall of the inner tube and the inner wall of the outer tube.

5. The automobile air-conditioning evaporator connecting aluminum tube according to claim 4, characterized in that: The threaded fins are connected to the inner tube and the outer tube by spot welding.

6. The automobile air-conditioning evaporator connecting aluminum tube according to claim 1, characterized in that: The outer wall of the outer tube is coated with a high temperature resistant layer.

7. The automobile air-conditioning evaporator connecting aluminum tube according to claim 1, characterized in that: The inner wall of the inner tube is coated with a zinc coating.

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