Automobile air conditioner evaporator structure

Abstract

The utility model relates to the technical field of automobile air conditioners, in particular to an automobile air conditioner evaporator structure which comprises a flat pipe and collecting pipelines connected to the two ends of the flat pipe, each collecting pipeline is composed of a collecting pipe main plate and a collecting pipe cover plate connected with the collecting pipe main plate, and a liquid inlet pipe and an air outlet pipe are connected to one collecting pipeline. The end, connected with the collecting pipeline, of the liquid inlet pipe is provided with a liquid inlet end inner diameter face, the cross section of the end, located in the collecting pipeline, of each flat pipe forms a flat pipe end face, and the lowest liquid inlet position of the liquid inlet end inner diameter face and the flat pipe end face are located at the same height. The relative position of the inner diameter face of the liquid inlet end of the liquid inlet pipe and the end face of the flat pipe is improved, so that the liquid inlet bottom face of a refrigerant is flush with the end face of the flat pipe, and the situation that the refrigerant flows to the flat pipe and impacts to form a parabola to cause loss of part of the refrigerant in the flat pipe in the past is reduced. And the temperature distribution uniformity of the first flow of the evaporator is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive air conditioners, in particular to an automotive air conditioner evaporator structure. Background Art

[0002] An automotive evaporator is a component in an air conditioning system. Its function is that low-temperature condensed gas passes through the evaporator, exchanges heat with the outside air, liquefies and absorbs heat to achieve the refrigeration effect.

[0003] Currently, it is found in evaporator products that when the refrigerant flows and distributes to the flat tubes, there will be an impact at the flat tubes, forming a parabola, resulting in the lack of refrigerant in some flat tubes, affecting the uniformity of the temperature distribution in the first process. Therefore, in this application, the liquid inlet pipe and the flat tube are improved, and an automotive air conditioner evaporator structure is proposed to solve this problem. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides an automotive air conditioner evaporator structure, making the bottom surface of the refrigerant liquid inlet flush with the end surface of the flat tube, so that the refrigerant can flow into each flat tube more evenly, reducing the situation that the refrigerant flowing to the flat tube forms a parabola due to impact and causing the lack of refrigerant in some flat tubes in the past.

[0005] The automotive air conditioner evaporator structure in this solution includes a number of flat tubes arranged in parallel and at intervals, and a collecting pipeline connected to both ends of the flat tubes. The collecting pipeline is composed of a collecting pipe main board connected to the end of the flat tube and a collecting pipe cover plate connected to the collecting pipe main board. An inlet pipe and an outlet pipe are connected to one collecting pipeline, and an inlet end of the inlet pipe connected to the collecting pipeline is provided with an inlet liquid inlet end, and the inlet liquid inlet end has an inner diameter surface of the inlet liquid inlet end. The end cross-sections of each flat tube located in the collecting pipeline form flat tube end surfaces, and the lowest liquid inlet point of the inner diameter surface of the inlet liquid inlet end is at the same height as the flat tube end surface.

[0006] The further limited technical solution of the utility model is:

[0007] Further, the inlet liquid inlet end is a straight pipe, and the orientation of the inlet liquid inlet end is perpendicular to the length direction of the flat tube.

[0008] Further, the ends of the inlet pipe and the outlet pipe far from the collecting pipeline are simultaneously connected to an expansion valve.

[0009] Further, fins are connected to the flat tubes.

[0010] Further, a partition plate and a flow disturbing plate are connected in the collecting pipeline.

[0011] Further, an end plate is connected to the end of the collecting pipeline.

[0012] The beneficial effects of the present utility model are as follows: The automotive air conditioner evaporator structure provided by the present utility model improves the relative position between the inner diameter surface of the liquid inlet end of the liquid inlet pipe and the end surface of the flat tube, making the bottom surface of the refrigerant liquid inlet flush with the end surface of the flat tube. The refrigerant can flow into each flat tube more evenly, reducing the situation where the refrigerant in the past flowed to the flat tube, formed a parabola due to the impact, and caused the lack of refrigerant in some flat tubes, greatly improving the uniformity of the temperature distribution in the first process of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the automotive air conditioner evaporator structure in the embodiment of the present utility model;

[0014] Figure 2 It is a schematic diagram of the structure at the connection of the liquid inlet pipe in the embodiment of the present utility model;

[0015] Figure 3 It is a schematic diagram of the confluence of the liquid inlet end and the end surface of the flat tube in the embodiment of the present utility model;

[0016] Figure 4 It is a schematic diagram of the confluence of the liquid inlet end and the end surface of the flat tube in the original evaporator structure;

[0017] Wherein: 1, fin; 2, flat tube; 3, main board of the collecting pipe; 4, cover plate of the collecting pipe; 5, end plate; 6, spoiler; 7, partition plate; 8, liquid inlet pipe; 9, air outlet pipe; 10, expansion valve; 21, end surface of the flat tube; 81, liquid inlet end; 811, inner diameter surface of the liquid inlet end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] An automotive air conditioner evaporator structure provided in this embodiment, as Figure 1-2 shown, includes a plurality of flat tubes 2 arranged in parallel and at intervals and a collecting pipeline connected to both ends of the flat tubes 2. Fins 1 are connected to both sides of the flat tubes 2. The collecting pipeline is mainly composed of a main board 3 of the collecting pipe connected to the end of the flat tube 2 and a cover plate 4 of the collecting pipe connected to the main board 3 of the collecting pipe. A partition plate 7 and a spoiler 6 are connected in each collecting pipeline. An end plate 5 is connected to the end of the collecting pipeline. The partition plate 7 is used to separate different parts of the evaporator to ensure that the refrigerant flows along a predetermined path inside the evaporator. The end plate 5 is located at both ends of the evaporator and is used to fix and seal components such as fins 1, flat tubes 2, and the collecting pipeline to ensure that the refrigerant does not leak when flowing inside the evaporator. A liquid inlet pipe 8 and an air outlet pipe 9 are connected to one of the collecting pipelines to form the entire evaporator body. At the same time, the ends of the liquid inlet pipe 8 and the air outlet pipe 9 far from the collecting pipeline are both connected to an expansion valve 10, which is used to control the flow rate and pressure of the refrigerant. By adjusting the expansion valve 10, the evaporation speed of the refrigerant inside the evaporator can be controlled, thereby ensuring the efficient and stable operation of the evaporator.

[0019] As Figure 3As shown in the figure, in this embodiment, the liquid inlet pipe 8 is provided with a liquid inlet end 81 at one end connected to the collecting pipeline. The liquid inlet end 81 is specifically a straight pipe with a certain length, and the orientation of the liquid inlet end 81 is perpendicular to the length direction of the flat pipe 2. The liquid inlet end 81 has an inner diameter surface 811 of the liquid inlet end. The end cross-section of each flat pipe 2 located in the collecting pipeline forms a flat pipe end face 21. Among them, the lowest liquid inlet position of the inner diameter surface 811 of the liquid inlet end is at the same height as the flat pipe end face 21. When the refrigerant flows from the liquid inlet end 81 of the liquid inlet pipe 8 to each flat pipe 2 in the collecting pipeline, the refrigerant will flow into each flat pipe 2 more evenly.

[0020] It should be noted that, as Figure 4 shown, in the design of the conventional liquid inlet pipe 8, the top position of the flat pipe 2 is higher than the inner diameter surface 811 of the liquid inlet end. When the refrigerant flows to the flat pipe 2, there will be an impact, forming a parabola, resulting in the lack of refrigerant in some flat pipes 2 and uneven temperature. After being improved by this embodiment, the top position of the flat pipe 2 is flush with the bottom of the inner diameter of the liquid inlet pipe, so that the refrigerant flows in a straight line and is distributed to the end of each flat pipe 2 and enters, thus ensuring the temperature uniformity of the first process. After testing, the temperature distribution uniformity of the first process has been significantly improved. The test result of the temperature distribution uniformity shows that the temperature difference of the first process is less than 2°C, meeting the performance requirements of customers.

[0021] In addition to the above embodiments, the present invention may also have other implementation manners; all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An automobile air-conditioning evaporator structure, comprising a plurality of parallel and spaced flat tubes (2) and a collection pipe connected to both ends of the flat tubes (2), wherein the collection pipe is composed of a collection pipe main plate (3) connected to the ends of the flat tubes (2) and a collection pipe cover plate (4) connected to the collection pipe main plate (3), characterized in that: A liquid inlet pipe (8) and an air outlet pipe (9) are connected to one of the collecting pipes, and a liquid inlet end (81) is provided at one end of the liquid inlet pipe (8) connected to the collecting pipe, the liquid inlet end (81) having a liquid inlet end inner diameter surface (811), and the end sections of each of the flat tubes (2) located in the collecting pipe form a flat tube end surface (21), wherein the lowest point of the liquid inlet end inner diameter surface (811) is located at the same height as the flat tube end surface (21).

2. The automobile air-conditioning evaporator structure according to claim 1, characterized in that: The liquid inlet end (81) is a straight tube, and the direction of the liquid inlet end (81) is perpendicular to the length direction of the flat tube (2).

3. The automobile air-conditioning evaporator structure according to claim 1, characterized in that: The ends of the liquid inlet pipe (8) and the gas outlet pipe (9) away from the collecting pipeline are simultaneously connected to an expansion valve (10).

4. The automobile air-conditioning evaporator structure according to claim 1, characterized in that: The flat tube (2) is connected to a fin (1).

5. The automobile air-conditioning evaporator structure according to claim 1, characterized in that: A partition plate (7) and a spoiler plate (6) are connected in the collecting pipe.

6. The automobile air-conditioning evaporator structure according to claim 1, characterized in that: The end of the collecting pipeline is connected to an end plate (5).

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