Vehicle-mounted air temperature type efficient liquid hydrogen heat exchanger

Abstract

The utility model relates to the technical field of liquid hydrogen heat exchangers, and discloses a vehicle-mounted air temperature type efficient liquid hydrogen heat exchanger which comprises two square fin modules, heat exchange pipes are arranged in the two square fin modules, a plurality of heat exchange holes are formed in the square fin modules, and the heat exchange holes are communicated with the heat exchange pipes. A fin inner hole wind accumulation cover is fixedly connected to the outer portion of the square fin module, outer fin wind accumulation covers are fixedly connected to the left side and the right side of the outer portion of the fin inner hole wind accumulation cover, the square fin module is made of aluminum alloy and is formed in an extrusion mode through an integral mold, holes are longitudinally formed in one end of the module in an array mode, and the hole opening positions are 10% notched. The size of each hole is 0.5 mm larger than the diameter of the heat exchange tube. According to the vehicle-mounted heat exchanger, air flow and heat exchange are optimized from multiple aspects, the heat dissipation efficiency is jointly improved, the whole heat exchanger can be reasonably arranged in a limited vehicle-mounted space, and the requirement of vehicle-mounted use for space compactness is met.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen heat exchangers, in particular to a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger. Background Art

[0002] Liquid hydrogen heat exchangers are key heat exchange devices in liquid hydrogen systems, primarily used to transfer heat between liquid hydrogen and other fluids. As an extremely low-temperature medium, liquid hydrogen typically remains at approximately -253 degrees Celsius. During its storage, transportation, and use, it requires heat exchange with the outside world to meet specific process requirements. Liquid hydrogen heat exchangers generally offer highly efficient heat exchange performance. Through their specialized structural design and material selection, they can create a large temperature differential between liquid hydrogen and other fluids, enabling rapid and efficient heat transfer.

[0003] With the rapid development of hydrogen energy, the exploration of liquid hydrogen applications in fields such as automobiles and ships has become increasingly in-depth. Under this trend, the market urgently needs heat exchangers with efficient heat exchange, compact structure, reliability and practicality. However, at present, some air-temperature high-efficiency liquid hydrogen heat exchangers in the existing technology have exposed obvious defects. During use, its heat dissipation effect is difficult to achieve the ideal state, and it is impossible to dissipate heat efficiently, which greatly limits its working efficiency and application scope. In particular, due to the special properties of liquid hydrogen with high specific heat capacity and ultra-low temperature, as well as the special requirements of vehicle-mounted space, such as limited space and complex vibration environment, this type of air-temperature liquid hydrogen heat exchanger is difficult to be directly applied to the vehicle-mounted space. At present, vehicle-mounted air-temperature liquid hydrogen heat exchangers are still in the blank research and development stage. Therefore, in response to the above shortcomings, a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger, which aims to improve the problem of poor heat exchange effect of the air-temperature liquid hydrogen heat exchanger in the prior art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger includes two square fin modules, each of which is provided with a heat exchange tube. The square fin modules are provided with a plurality of heat exchange holes. The outside of the square fin modules is fixedly connected to a fin inner hole wind collection cover, and the left and right sides of the outside of the fin inner hole wind collection cover are fixedly connected to an outer fin wind collection cover.

[0007] As a further description of the above technical solution:

[0008] The square fin module is made of aluminum alloy and is extruded using an integral mold. One end of the module has a longitudinal array of holes, with a 10% notch at the hole position. The hole size is the diameter of the heat exchange tube minus 0.5 mm.

[0009] As a further description of the above technical solution:

[0010] The square fin module adopts a square thin sheet structure to increase the module surface area. Two square fin modules are combined into an integral module. The heat exchange tubes are arranged alternately with one heat exchange hole between them.

[0011] As a further description of the above technical solution:

[0012] The square fin modules are arranged to face the fins head-on, which is conducive to the wind passing directly through the surface of each fin;

[0013] As a further description of the above technical solution:

[0014] The fin inner hole wind collection cover, the outer fin wind collection cover and the reinforcing ribs constitute a wind collection cover module, which has a trumpet shape, with one end larger than the other, and the small end connected to the square fin module and the heat exchange tube. The wind collection cover is placed at the windward end and the leeward end of the equipment;

[0015] As a further description of the above technical solution:

[0016] The liquid circulating inside the heat exchange tube is hydrogen cryogenic fluid.

[0017] The utility model has the following beneficial effects:

[0018] In the present invention, in terms of improving heat dissipation efficiency, its square fin module is extruded and formed using an integral die made of aluminum alloy. A hole is opened at one end and the plasticity of the aluminum profile is used to make the heat exchange tube fit tightly, eliminating the need for welding. This avoids damage caused by low-temperature stress concentration while ensuring structural stability. Moreover, the fin module with a square thin-sheet structure increases the surface area. The two are combined into an integral module. In addition, the heat exchange tubes are arranged with alternating heat exchange holes, which effectively reduces the mutual thermal interference between the heat exchange tubes and increases the hole area, which is conducive to the air taking away the cold. At the same time, the wind hood module is trumpet-shaped and is placed at the windward and leeward ends of the equipment respectively. The windward end uses the Bernoulli effect to reduce wind pressure and increase wind speed to efficiently take away cold energy. The leeward end reduces wind pressure and increases wind speed to generate suction to assist air in quickly inhaling the fin module, optimizing air flow and heat exchange from multiple aspects, thereby improving heat dissipation efficiency. In terms of compact layout, the heat exchange tubes are arranged inside two square fin modules. The fin modules themselves are extruded using a compact integral mold with reasonable opening and combination methods. The wind hood module fits tightly onto the outside of the fin module. The overall structural layout is tight and orderly, with no extra space wasted, allowing the entire heat exchanger to be reasonably placed within the limited vehicle space, meeting the requirements for space compactness for vehicle use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram of a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger proposed in the utility model;

[0020] Figure 2 This is a schematic diagram of the heat exchange tube structure of a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of an external fin wind hood of a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger proposed in the utility model;

[0022] Figure 4 This is a schematic diagram of the heat exchange hole structure of a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger proposed in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the fin inner hole wind hood of a vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger proposed by the utility model;

[0024] Figure 6 This is a schematic diagram of the square fin module structure of an on-board air-temperature high-efficiency liquid hydrogen heat exchanger proposed in the utility model.

[0025] Legend:

[0026] 1. Heat exchange tube; 2. External fin wind hood; 3. Fin inner hole wind hood; 4. Square fin module; 5. Heat exchange hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Reference Figures 1 to 3 The utility model provides an embodiment: an on-board air-temperature high-efficiency liquid hydrogen heat exchanger, comprising two square fin modules 4. The square fin module 4 is made of aluminum alloy and is extruded using an integral mold. A longitudinal array of holes is formed at one end of the module, and the hole position is notched by 10%. The hole size is the diameter of the heat exchange tube - 0.5 mm. The hole design allows the heat exchange tube to pass directly through, and the plasticity of the aluminum profile is utilized to fit tightly with the heat exchange tube without welding. This avoids stress concentration damage caused by shrinkage differences between different materials in a low-temperature environment, thereby improving the reliability and service life of the heat exchanger. The square fin module 4 is arranged to face the fins head-on, which is conducive to the wind passing directly through the surface of each fin. Such a layout is conducive to the wind passing directly through the surface of each fin, reducing air flow resistance, allowing the air to exchange heat with the fins more smoothly, and maximizing the surface area to enhance the heat exchange effect with the air. Heat exchange tubes 1 are provided inside the two square fin modules 4. Hydrogen cryogenic fluid flows inside the heat exchange tubes 1. It is necessary to ensure that the hydrogen cryogenic fluid can flow stably in the tubes and that the air outside the tubes can effectively exchange heat with the hydrogen cryogenic fluid.

[0029] Reference Figures 3 to 5 The liquid flowing through the heat exchange tubes 1 is cryogenic hydrogen. The square fin modules 4 are internally provided with multiple heat exchange holes 5. These square fin modules 4 utilize a square fin structure to increase the module's surface area. Compared to traditional circular fin structures, the square fins more effectively increase the module's surface area, increasing the contact area with the air and thus improving heat exchange efficiency. Two square fin modules 4 are combined into a single module. Heat exchange tubes 1 are arranged alternately, with each heat exchange hole 5 spaced apart. A fin inner hole wind hood 3 is fixedly attached to the outside of the square fin modules 4.

[0030] Reference Figures 4 to 6The outer fin wind hood 2 is fixedly connected to the left and right sides of the outer fin wind hood 3. The main function of the outer fin wind hood 2 is to further optimize the air flow characteristics at the windward and leeward ends of the equipment. At the windward end, it works in conjunction with the fin inner hole wind hood 3 to enhance the Bernoulli effect, allowing more air to quickly enter the square fin module 4; at the leeward end, the special shape of the outer fin wind hood 2 helps to reduce wind pressure and increase wind speed, generating air suction to assist the rapid inhalation of air into the square fin module 4. The fin inner hole wind hood 3 and the outer fin wind hood 2 and the reinforcing ribs constitute the wind hood module, which has a trumpet-shaped structure. This trumpet-shaped structure can utilize the Bernoulli effect. When wind passes through the wind hood and enters the square module holes and fins, the wind pressure is reduced and the wind speed is increased due to spatial changes, thereby efficiently removing cold energy. One end is large and the other end is small. The small end is connected to the square fin module 4 and the heat exchange tube 1, and the large end faces the direction of air flow. The wind hoods are placed at the windward and leeward ends of the equipment.

[0031] Working Principle: This on-board, air-cooled, high-efficiency liquid hydrogen heat exchanger primarily consists of a square fin module 4, heat exchange tubes 1, and a wind shield module. The square fin module 4 is extruded from an aluminum alloy die. One end features a longitudinal array of holes, with a 10% notch. The size of the holes is the diameter of the heat exchange tube minus 0.5mm. This allows the heat exchange tube to pass directly through and adhere to the tube using the plasticity of the aluminum profile. No welding is required, preventing stress concentration damage caused by differential shrinkage of different materials at low temperatures. The module utilizes a square fin structure to increase the surface area. Two heat exchange tubes are combined into a single module. The heat exchange tubes are arranged alternately, with one hole between each hole. This minimizes thermal interference between the tubes and increases the hole area, facilitating airflow and improving heat transfer efficiency. The module's orientation, facing the fins, facilitates air flow across the fin surface. The wind shield module, consisting of an inner fin wind shield 3, an outer fin wind shield 2, and reinforcing ribs, forms a trumpet-shaped structure and is positioned at the windward and leeward ends of the device, respectively. The Bernoulli effect is utilized at the windward end, and the wind hood shrinks the space. When the wind passes through the wind hood and enters the holes and fins of the square module, the wind pressure decreases and the wind speed increases due to the change in space, thereby efficiently taking away the cold energy; the wind hood at the leeward end expands from small to large, reducing the wind pressure and increasing the wind speed, generating air suction to assist the air in being quickly drawn into the square fin module 4, ultimately achieving efficient heat exchange between liquid hydrogen and air.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger, comprising two square fin modules (4), characterized in that: Heat exchange tubes (1) are provided inside the two square fin modules (4), a plurality of heat exchange holes (5) are provided inside the square fin modules (4), a fin inner hole wind collection cover (3) is fixedly connected to the outside of the square fin modules (4), and an outer fin wind collection cover (2) is fixedly connected to the left and right sides of the outside of the fin inner hole wind collection cover (3).

2. The vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger according to claim 1, characterized in that: The material of the square fin module (4) is aluminum alloy and is extruded using an integral mold. A longitudinal array of holes is formed at one end of the module, and the hole position is notched by 10%. The hole size is the diameter of the heat exchange tube minus 0.5 mm.

3. The vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger according to claim 1, characterized in that: The square fin module (4) adopts a square thin sheet structure to increase the module surface area. Two square fin modules (4) are combined into an integral module. The heat exchange tubes (1) are arranged alternately with a heat exchange hole (5) at intervals.

4. The vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger according to claim 1, characterized in that: The square fin modules (4) are arranged to face the fins head-on, which is conducive to wind passing directly through the surface of each fin.

5. The vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger according to claim 1, characterized in that: The fin inner hole wind collection cover (3), the outer fin wind collection cover (2) and the reinforcing ribs constitute a wind collection cover module, which has a trumpet-shaped structure with one end being large and the other end being small, and the small end being connected to the square fin module (4) and the heat exchange tube (1). The wind collection cover is placed at the windward end and the leeward end of the equipment.

6. The vehicle-mounted air-temperature high-efficiency liquid hydrogen heat exchanger according to claim 1, characterized in that: The liquid circulating inside the heat exchange tube (1) is hydrogen cryogenic fluid.

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