Circular oil cooler structure of electric propulsion device

Abstract

The utility model discloses a circular oil cooler structure of an electric propulsion device, which comprises a first collecting pipe and a second collecting pipe, parallel flow flat pipes are connected between the first collecting pipe and the second collecting pipe, two groups of parallel flow flat pipes are arranged, radiating fins are arranged on the first collecting pipe and the second collecting pipe on one side of the parallel flow flat pipes, the radiating fins are of a wave-shaped structure, and the first collecting pipe and the second collecting pipe are communicated with each other. The parallel flow flat pipes are longitudinally distributed on the inner sides of the first collecting pipe and the second collecting pipe, and the oil cooler has the advantages that the parallel flow flat pipes and the cooling fins are adopted in the oil cooler, the series-parallel connection process mode is adopted, the requirements for flow resistance and heat exchange performance are met, the round collecting pipe structure formed by the first collecting pipe and the second collecting pipe is adopted, and the heat exchange efficiency is improved. The overall heat dissipation area is further increased, the heat exchange efficiency is improved, the internal flow resistance and the surface wind resistance of the oil cooler are reduced, the heat dissipation requirement of the electric propulsion device is met, and the overall structure is lighter under the condition that the performance and the structural strength are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil coolers, in particular to a circular oil cooler structure of an electric propulsion device. Background Art

[0002] In recent years, China has made significant achievements in the green industry. In terms of transportation, the new energy vehicle industry has developed rapidly. With the upgrading and transformation of electrification, the aviation industry has also ushered in new opportunities. eVTOL is expected to play an important role in future air travel scenarios. The core subsystems of eVTOL mainly include six categories: body, integrated avionics system, flight control system, energy system, power system and electrical system.

[0003] Electric propulsion technology uses electric energy as part or all of the energy of the power system, including hybrid power, batteries, fuel cells, etc., and provides part or all of the power required by the aircraft by driving the lift and propulsion devices through motors. The oil cooler is a key component in the thermal management system of the electric propulsion device, which not only requires structural strength and light weight, but also heat exchange performance is the most critical link. Therefore, a circular oil cooler structure for an electric propulsion device is provided to solve the above problems. Utility Model Content

[0004] In order to solve the problems in the above background technology, the technical solution adopted by the utility model to solve the technical problems is: a circular oil cooler structure of an electric propulsion device, which includes: a first header and a second header, parallel flow flat tubes are connected between the first header and the second header, and the number of the parallel flow flat tubes is arranged in two groups. The first header and the second header are provided with cooling fins on one side of the parallel flow flat tubes, and the cooling fins are of a wavy structure. The parallel flow flat tubes are longitudinally distributed on the inner side of the first header and the second header.

[0005] As a preferred technical solution of the utility model, the first manifold and the second manifold are both arc-shaped structures, a first liquid inlet joint is provided on one side of the second manifold, and a first liquid outlet joint is provided on the same side of the second manifold as the first liquid inlet joint.

[0006] As a preferred technical solution of the utility model, a second liquid outlet joint is arranged on the side of the first manifold close to the first liquid inlet joint, and a second liquid inlet joint is arranged on the same side of the first manifold as the first liquid inlet joint.

[0007] As a preferred technical solution of the utility model, the first liquid inlet joint is connected to the first liquid outlet joint through a parallel flow flat tube.

[0008] As a preferred technical solution of the utility model, the second liquid inlet joint is connected to the second liquid outlet joint through a parallel flow flat tube.

[0009] As a preferred technical solution of the present utility model, a first connecting member is provided between adjacent ends of the first header and the second header, and a second connecting member is provided between the other adjacent ends of the first header and the second header.

[0010] The present utility model has the following advantages: The oil cooler of the present utility model adopts a parallel flow flat tube plus heat dissipation fin structure, and adopts a series-parallel flow process method to meet the requirements of flow resistance and heat transfer performance. The parallel flow flat tube parallel circuit countercurrent increases the heat transfer performance;

[0011] Adopting a circular header structure composed of a first header and a second header further increases the overall heat dissipation area, improves the heat transfer efficiency, reduces the internal flow resistance and the air resistance on the surface of the oil cooler, meets the heat dissipation requirements of the electric propulsion device, and has a more lightweight overall structure while ensuring performance and structural strength. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the overall structure of a preferred embodiment of the present utility model;

[0013] Figure 2 is a schematic diagram of the top view structure of a preferred embodiment of the present utility model;

[0014] Figure 3 is a schematic diagram of the heat dissipation fin structure of a preferred embodiment of the present utility model.

[0015] Description of the reference numerals: 1. First header; 2. Second header; 3. Parallel flow flat tube; 4. Heat dissipation fin; 5. First liquid inlet joint; 6. First liquid outlet joint; 7. Second liquid outlet joint; 8. Second liquid inlet joint; 9. First connecting member; 10. Second connecting member. Detailed Embodiments

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0017] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0018] The present utility model will be further described below with reference to the accompanying drawings.

[0019] Please refer to Figures 1 - 3 , a circular oil cooler structure of an electric propulsion device of the present utility model includes: a first header 1 and a second header 2. A parallel flow flat tube 3 is connected between the first header 1 and the second header 2. The number of parallel flow flat tubes 3 is set to two groups. Heat dissipation fins 4 are arranged on one side of the first header 1 and the second header 2. The heat dissipation fins 4 are of a wavy structure. The parallel flow flat tubes 3 are longitudinally distributed inside the first header 1 and the second header 2.

[0020] Among them, both the first header 1 and the second header 2 are of an arc-shaped structure, which can increase the overall heat dissipation area and improve the heat exchange efficiency. A first liquid inlet joint 5 is arranged on one side of the second header 2. A first liquid outlet joint 6 is arranged on the same side of the second header 2 as the first liquid inlet joint 5. A second liquid outlet joint 7 is arranged on the side of the first header 1 close to the first liquid inlet joint 5. A second liquid inlet joint 8 is arranged on the same side of the first header 1 as the first liquid inlet joint 5. The first liquid inlet joint 5 is communicated with the first liquid outlet joint 6 through the parallel flow flat tube 3. The second liquid inlet joint 8 is communicated with the second liquid outlet joint 7 through the parallel flow flat tube 3. A first connecting member 9 is arranged between the adjacent ends of the first header 1 and the second header 2. A second connecting member 10 is arranged between the other adjacent ends of the first header 1 and the second header 2.

[0021] In summary, the oil cooler of the present utility model adopts the structure of parallel flow flat tubes 3 plus heat dissipation fins 4. The two groups of parallel flow flat tubes 3 and the first liquid inlet joint 5, the first liquid outlet joint 6, the second liquid outlet joint 7, and the second liquid outlet joint 7 adopt a series-parallel flow process method, so as to meet the requirements of flow resistance and heat exchange performance, and at the same time increase the overall heat dissipation area and improve the heat exchange efficiency.

[0022] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

[0023] Other parts not detailed in the present utility model belong to the prior art, so they will not be elaborated here.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circular oil cooler structure for an electric propulsion device, characterized in that, Comprising: A first header (1) and a second header (2), with parallel flow flat tubes (3) connected between the first header (1) and the second header (2). There are two sets of the parallel flow flat tubes (3). Heat dissipation fins (4) are arranged on one side of the parallel flow flat tubes (3) for the first header (1) and the second header (2). The heat dissipation fins (4) are of a wavy structure. The parallel flow flat tubes (3) are longitudinally distributed inside the first header (1) and the second header (2).

2. The circular oil cooler structure of an electric propulsion device according to claim 1, characterized in that, Both the first header (1) and the second header (2) are of an arc-shaped structure. A first liquid inlet joint (5) is arranged on one side of the second header (2), and a first liquid outlet joint (6) is arranged on the same side of the second header (2) as the first liquid inlet joint (5).

3. The circular oil cooler structure of an electric propulsion device according to claim 1, characterized in that, A second liquid outlet joint (7) is arranged on one side of the first header (1) close to the first liquid inlet joint (5), and a second liquid inlet joint (8) is arranged on the same side of the first header (1) as the first liquid inlet joint (5).

4. The circular oil cooler structure of an electric propulsion device according to claim 2, characterized in that The first liquid inlet joint (5) communicates with the first liquid outlet joint (6) through the parallel flow flat tubes (3).

5. The circular oil cooler structure of an electric propulsion device as described in claim 3, wherein, The second liquid inlet joint (8) communicates with the second liquid outlet joint (7) through the parallel flow flat tubes (3).

6. The circular oil cooler structure of an electric propulsion device according to claim 1, characterized in that A first connecting member (9) is arranged between the adjacent ends of the first header (1) and the second header (2), and a second connecting member (10) is arranged between the other adjacent ends of the first header (1) and the second header (2).

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