Multi-stage heat dissipation type fuel cell air compressor

Abstract

The invention belongs to the technical field of air compressors, and particularly relates to a multi-stage heat dissipation type fuel cell air compressor. The air compressor comprises an air compressor body, an inner shell, a liquid guide pipe and a fan; a plurality of heat dissipation fins are arranged on the outer side wall of the air compressor body in the circumferential direction at intervals. The air compressor body is sleeved with the inner shell, a ventilation cavity is formed between the inner shell and the air compressor body, and a plurality of ventilation holes are formed in the inner shell; the liquid guide pipe sequentially penetrates through the heat dissipation fins, is spirally wound on the periphery of the air compressor body and is connected with a liquid inlet pipe and a liquid outlet pipe which penetrate through the inner shell; and an air outlet of the fan is communicated with the ventilation hole. When the air compressor body runs for a short time, the fan can be independently selected to be started to introduce cold air into the inner shell or introduce cooling liquid into the liquid guide pipe, and the cooling liquid exchanges heat with the cooling fins in the flowing process, so that the air compressor body is cooled. When the air compressor body operates for a long time, air cooling and liquid cooling can be utilized at the same time, heat dissipation can be conducted quickly and effectively, and stable operation of the air compressor under high load is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of air compressors, and in particular relates to a multi-stage heat dissipation fuel cell air compressor. Background Art

[0002] The air compressor dedicated to fuel cells is a very important component in the hydrogen fuel cell power system. Its function is to provide compressed air of a certain pressure and flow rate to the cathode of the fuel cell to meet the fuel cell's chemical reaction's demand for oxygen in the air. The air compressor compresses the air into high-pressure air and then sends it to the cathode of the fuel cell. The oxygen in the air reacts electrochemically with the hydrogen at the anode. The products generated are electricity and water, and some heat is discharged into the atmosphere with the excess air. Apart from this, there are no other products that pollute the environment. However, the air compressor will generate a lot of heat energy during operation, and the heat needs to be effectively dissipated to ensure the normal operation of the air compressor.

[0003] An existing heat dissipation device for an air compressor includes a water storage tank installed on one side of the air compressor housing, and a water outlet pipe and a water inlet pipe inserted into the air compressor housing are installed at the water storage tank. The water outlet pipe and the water inlet pipe are connected to allow the coolant to flow in the air compressor housing. A water collecting box is provided in the water storage tank, and the coolant enters the water guide pipe from the water collecting box and is finally transported to the water inlet pipe, and then transported to the air compressor housing through the water inlet pipe, thereby achieving the effect of cooling the air compressor housing. During the transportation, the water guide pipe is set to be multiple and bends back and forth, which effectively increases the cooling time of the fan for the cooling water in the water guide pipe, thereby improving the cooling effect. However, the heat generated by the air compressor in short-term operation and long-term operation is different. Using the same heat dissipation method will cause a waste of resources for short-term operation and poor heat dissipation effect for long-term operation. Summary of the invention

[0004] The present invention provides a multi-stage heat dissipation fuel cell air compressor suitable for a variety of operating conditions such as short-time operation and long-time operation.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The present application provides a multi-stage heat dissipation fuel cell air compressor, comprising:

[0007] An air compressor body, wherein the outer side wall of the air compressor body is provided with a plurality of heat dissipation fins at intervals along the circumferential direction;

[0008] An inner shell is sleeved on the air compressor body to form a ventilation cavity with the air compressor body, and the inner shell is provided with a plurality of ventilation holes;

[0009] a liquid guide pipe, passing through the heat dissipation fins in sequence and spirally wound around the periphery of the air compressor body, the liquid guide pipe being connected with a liquid inlet pipe and a liquid outlet pipe, and the liquid inlet pipe and the liquid outlet pipe both pass through the inner shell; and

[0010] A fan, wherein an air outlet of the fan is connected to the ventilation hole.

[0011] Furthermore, the inner wall of the inner shell and the heat dissipation fins are arranged at intervals.

[0012] Furthermore, it also includes an outer shell, which is sleeved outside the inner shell to enclose an air collecting chamber with the inner shell. The outer shell is provided with a ventilation window, and the air outlet of the fan is connected to the air collecting chamber.

[0013] Furthermore, a dustproof net is detachably connected to the ventilation window.

[0014] Furthermore, there are a plurality of ventilation windows, which are evenly spaced around the periphery of the air compressor body.

[0015] Furthermore, a plurality of the fans are evenly arranged around the inner shell.

[0016] Furthermore, in the axial direction of the air compressor body, the fans and the ventilation windows are arranged alternately.

[0017] Furthermore, the ventilation windows and the fans are alternately arranged in the circumferential direction of the air compressor body.

[0018] Furthermore, the liquid inlet pipe is connected to the middle part of the liquid guiding pipe, and both ends of the liquid guiding pipe are blocked and connected to the liquid outlet pipe.

[0019] The present invention can achieve the following beneficial effects:

[0020] 1. The present application provides a multi-stage heat dissipation fuel cell air compressor. A heat dissipation fin is provided on the outside of the air compressor body. When the fan is started, the outside cold air enters the air collecting chamber, and then flows into the inner shell through the ventilation holes, exchanges heat with the heat dissipation fins, and plays a role in cooling the air compressor body.

[0021] 2. The liquid guide pipe passes through the cooling fins in turn and is spirally wound around the periphery of the air compressor body. The coolant is introduced into the liquid guide pipe through the liquid inlet pipe, which can cool the cooling fins, thereby achieving heat dissipation for the air compressor body and ensuring the normal operation of the air compressor body.

[0022] 3. During the short-term operation of the air compressor body, since the air compressor body generates less heat, you can choose to start the fan alone to let cold air into the inner shell to cool the air compressor body; you can also choose to let coolant into the liquid guide pipe through the liquid inlet pipe. The coolant will exchange heat with the cooling fins during the flow process to cool the air compressor body.

[0023] 4. During the long-term operation of the air compressor body, the air compressor body generates a lot of heat. The fan can be started and coolant can be introduced into the liquid guide pipe. At the same time, air cooling and liquid cooling can be used to quickly and effectively dissipate heat, ensuring the stable operation of the air compressor under high load. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0025] Figure 1 It is a structural schematic diagram of a multi-stage heat dissipation fuel cell air compressor of the present invention;

[0026] Figure 2 for Figure 1 The schematic diagram of the structure of the multi-stage heat dissipation fuel cell air compressor after the casing and the fan are hidden;

[0027] Figure 3 for Figure 2 Schematic diagram of the structure of the multi-stage heat dissipation fuel cell air compressor with the inner shell hidden.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Air compressor body; 11. Cooling fins; 2. Inner shell; 21. Ventilation holes; 3. Liquid guide tube; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Fan; 7. Outer shell; 71. Ventilation window; 8. Dust net. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] like Figures 1 to 3 As shown, a multi-stage heat dissipation fuel cell air compressor provided in the present application includes an air compressor body 1, an inner shell 2 and an outer shell 7 arranged in sequence from the inside to the outside, a liquid guide pipe 3 is located between the air compressor body 1 and the inner shell 2, and a fan 6 is located at the outermost part.

[0032] like Figure 3As shown, the outer wall of the air compressor body 1 is provided with a plurality of heat dissipation fins 11 at intervals along the circumferential direction. The plurality of heat dissipation fins 11 are radial as a whole. The length direction of the heat dissipation fins 11 is parallel to the axial direction of the air compressor body 1. The width direction of the heat dissipation fins 11 is consistent with the radial direction of the air compressor body 1. The heat generated during the operation of the air compressor body 1 can be transferred to the heat dissipation fins 11. The liquid guide tube 3 passes through the heat dissipation fins 11 in sequence and is spirally wound around the periphery of the air compressor body 1. The liquid guide tube 3 is connected to the liquid inlet tube 4 and the liquid outlet tube 5. The coolant is introduced into the liquid guide tube 3 through the liquid inlet tube 4, which can cool the heat dissipation fins 11, thereby achieving heat dissipation for the air compressor body 1 and ensuring the normal operation of the air compressor body 1.

[0033] like Figure 2 As shown, the inner shell 2 is sleeved outside the air compressor body 1, and a ventilation cavity is formed between the inner shell 2 and the air compressor body 1. In this embodiment, the inner wall of the inner shell 2 is spaced apart from the heat dissipation fins 11, and the spaces between the multiple heat dissipation fins 11 are connected. The inner shell 2 is provided with multiple ventilation holes 21, and the liquid inlet pipe 4 and the liquid outlet pipe 5 both pass through the inner shell 2.

[0034] The air outlet of the fan 6 is connected to the ventilation hole 21. In one embodiment, the fan 6 can be directly installed on the inner shell 2. In this embodiment, the outer shell 7 is installed outside the inner shell 2, and the outer shell 7 and the inner shell 2 enclose an air collecting cavity. The outer shell 7 is provided with a ventilation window 71, and the fan 6 is fixed on the outer shell 7. The air outlet of the fan 6 is connected to the air collecting cavity. When the fan 6 is started, the external cold air enters the air collecting cavity, and then flows into the inner shell 2 through the ventilation hole 21, and heat exchanges with the heat dissipation fins 11, which plays a role in cooling the air compressor body 1.

[0035] like Figure 1 As shown, the ventilation window 71 is detachably connected with a dustproof net 8, which effectively prevents the intrusion of external dust and protects the inside of the air compressor from pollution, which not only improves the cleanliness of the equipment, but also reduces the performance degradation and failure risk caused by dust accumulation. At the same time, the dustproof net 8 is easy to disassemble, which is convenient for cleaning and maintenance, ensuring the long-term stable operation of the air compressor, extending the service life of the equipment, and reducing maintenance costs.

[0036] A plurality of fans 6 are evenly arranged around the inner shell 2, and a plurality of ventilation windows 71 are evenly spaced around the periphery of the air compressor body 1, which can ensure that cold air enters the air collecting cavity evenly, making the air flow more balanced, helping to maintain the stability of the internal temperature of the air compressor and avoiding local overheating, thereby improving the heat dissipation performance and operating efficiency of the air compressor.

[0037] Furthermore, in the axial direction of the air compressor body 1, the fans 6 and the ventilation windows 71 are staggered, which helps to optimize the air flow path, so that the cold air can enter the inside of the shell 7 more evenly, thereby improving the heat dissipation efficiency. The fans 6 are all located at one end of the shell 7, and the ventilation windows 71 are all located at the other end of the shell 7, so that the flow direction of the airflow inside the shell 7 is roughly the same, which can reduce the vortex and resistance in the air flow, help reduce noise and improve the operating efficiency of the air compressor.

[0038] In the circumferential direction of the air compressor body 1, the ventilation windows 71 and the fans 6 are alternately arranged, which helps to achieve more efficient air flow and heat exchange, helps to evenly distribute cold air, and avoids local overheating, thereby improving the heat dissipation performance and operating stability of the air compressor.

[0039] In one embodiment, one end of the liquid guide tube 3 can be connected to the liquid inlet pipe 4, and the other end is connected to the liquid outlet pipe 5. In this embodiment, the liquid inlet pipe 4 is connected to the middle part of the liquid guide tube 3, and the two ends of the liquid guide tube 3 are blocked and are both connected to the liquid outlet pipe 5, which can shorten the flow path of the coolant in the liquid guide tube 3, can effectively transfer heat, and improve the cooling effect of the air compressor body 1 and the heat dissipation fins 11.

[0040] The heat generated during the operation of the air compressor body 1 can be transferred to the heat dissipation fins 11 to achieve cooling. During the short-term operation of the air compressor body 1, since the heat generated by the air compressor body 1 is relatively small, the fan 6 can be started separately to pass cold air into the inner shell 2 to cool the air compressor body 1; or the coolant can be passed into the liquid guide pipe 3 through the liquid inlet pipe 4, and the coolant exchanges heat with the heat dissipation fins 11 during the flow process to cool the air compressor body 1. During the long-term operation of the air compressor body 1, the air compressor body 1 generates a lot of heat. The fan 6 can be started and the coolant can be passed into the liquid guide pipe 3. At the same time, air cooling and liquid cooling can be used to quickly and effectively dissipate heat, ensuring the stable operation of the air compressor under high load. By flexibly using the two heat dissipation methods of air cooling and liquid cooling, not only the heat dissipation efficiency of the air compressor is improved, but also the adaptability of the air compressor is enhanced, the service life of the equipment is extended, and the maintenance cost is reduced.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage heat dissipation fuel cell air compressor, characterized in that: include: An air compressor body (1), wherein the outer wall of the air compressor body (1) is provided with a plurality of heat dissipation fins (11) at intervals along the circumferential direction; An inner shell (2) is sleeved outside the air compressor body (1) to form a ventilation cavity between the inner shell (2) and the air compressor body (1), and the inner shell (2) is provided with a plurality of ventilation holes (21); A liquid guide pipe (3) passes through the heat dissipation fins (11) in sequence and is spirally wound around the periphery of the air compressor body (1); the liquid guide pipe (3) is connected to a liquid inlet pipe (4) and a liquid outlet pipe (5); and the liquid inlet pipe (4) and the liquid outlet pipe (5) both pass through the inner shell (2); and A fan (6), wherein an air outlet of the fan (6) is in communication with the ventilation hole (21).

2. The multi-stage heat dissipation fuel cell air compressor according to claim 1, characterized in that: The inner wall of the inner shell (2) and the heat dissipation fins (11) are arranged at a distance.

3. The multi-stage heat dissipation fuel cell air compressor according to claim 1, characterized in that: It also comprises an outer shell (7), the outer shell (7) being sleeved outside the inner shell (2) and enclosing an air collecting chamber with the inner shell (2), the outer shell (7) being provided with a ventilation window (71), and the air outlet of the fan (6) being in communication with the air collecting chamber.

4. The multi-stage heat dissipation fuel cell air compressor according to claim 3, characterized in that: The ventilation window (71) is detachably connected to a dustproof net (8).

5. The multi-stage heat dissipation fuel cell air compressor according to claim 3, characterized in that: The ventilation windows (71) are provided in plurality and are evenly spaced around the periphery of the air compressor body (1).

6. The multi-stage heat dissipation fuel cell air compressor according to claim 5, characterized in that: A plurality of fans (6) are evenly arranged around the inner shell (2).

7. The multi-stage heat dissipation fuel cell air compressor according to claim 6, characterized in that: In the axial direction of the air compressor body (1), the fan (6) and the ventilation window (71) are arranged alternately.

8. The multi-stage heat dissipation fuel cell air compressor according to claim 6 or 7, characterized in that: The ventilation windows (71) and the fans (6) are arranged alternately in the circumferential direction of the air compressor body (1).

9. The multi-stage heat dissipation fuel cell air compressor according to claim 1, characterized in that: The liquid inlet pipe (4) is connected to the middle part of the liquid guide pipe (3), and both ends of the liquid guide pipe (3) are blocked and connected to the liquid outlet pipe (5).

Images