A non-bladed heat dissipation fan for a fuel cell system

Abstract

The utility model discloses a no fan blade formula heat dissipation fan for fuel cell system, including annular flow guide frame and turbocharger, annular flow guide frame is equipped with turbocharging chamber, turbocharger sets up in turbocharging chamber, is used for inhaling air, annular flow guide frame is equipped with flow guide cavity, annular cavity, annular air outlet and negative pressure flow area, the turbocharging chamber passes through flow guide cavity with annular cavity intercommunication, and annular cavity passes through annular air outlet with negative pressure flow area intercommunication. The utility model discloses discarded the fan blade formula structure of traditional heat dissipation fan, can reduce the noise generation in the fan air supply process, can stably send air.

Description

Technical Field

[0001] This utility model belongs to the field of cooling fan technology, specifically relating to a bladeless cooling fan for fuel cell systems. Background Technology

[0002] In practical applications, hydrogen fuel cells are often not used independently. They are usually combined with a hydrogen supply system, an energy management system, and a cooling system to form a complete hydrogen fuel cell system. The cooling system is divided into two parts: a water cooling system and an air cooling system. The water cooling system mainly uses a water pump to drive the circulation of the cooling medium (usually deionized water or ethylene glycol solution) in the water tank, thereby controlling the temperature of the fuel cell stack. The air cooling system mainly uses a cooling fan placed above the water tank to reduce the temperature of the cooling water coming out of the stack by suction, thereby achieving the purpose of rapid heat exchange and recycling of the cooling water.

[0003] However, in practical engineering applications of fuel cell systems, especially in high-power projects, multiple low-pressure or high-pressure fans are typically connected in parallel to meet the high heat dissipation requirements. The airflow of these traditional bladed fans varies constantly with the rotation of the blades, resulting in uneven heat dissipation when cooling the water tank surface. Furthermore, feedback from users indicates that the noise generated by multiple fans operating simultaneously is very high, and the resonance caused by multiple fans running at the same time negatively impacts their lifespan. In addition, feedback from manufacturers suggests that traditional bladed fans, designed for efficient heat dissipation, typically do not incorporate filters. Therefore, after prolonged use, the fan blades accumulate a thick layer of dust due to electrostatic attraction. Because of the large number of fans and the relatively tedious cleaning process, after-sales maintenance is time-consuming and labor-intensive.

[0004] Currently, it is necessary to develop a bladeless cooling fan for fuel cell systems to reduce noise generation during the fan's air delivery process and ensure stable airflow. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this utility model provides a bladeless cooling fan for fuel cell systems. It eliminates the blade structure of traditional cooling fans, thereby reducing noise generation during the air delivery process and enabling stable air delivery.

[0006] The present invention adopts the following technical solution: A bladeless cooling fan for a fuel cell system includes an annular guide frame and a turbocharger; the annular guide frame has a turbocharging chamber, and the turbocharger is disposed in the turbocharging chamber for drawing in air; the annular guide frame has a guide cavity, an annular cavity, an annular air outlet, and a negative pressure flow area, the turbocharger chamber is connected to the annular cavity through the guide cavity, and the annular cavity is connected to the negative pressure flow area through the annular air outlet.

[0007] Furthermore, the turbocharger chamber is provided with an air inlet, which is connected to the outside and is used to supply air into the turbocharger chamber.

[0008] Furthermore, the external profile of the turbocharger is circular.

[0009] Furthermore, the annular guide frame is provided with several negative pressure flow areas; a turbocharger chamber is provided between adjacent negative pressure flow areas.

[0010] Furthermore, the negative pressure flow area is provided in three places, and the turbocharger chamber is provided in two places, with a turbocharger installed in each turbocharger chamber.

[0011] Furthermore, the left and right ends of the annular flow guide frame are both semi-circular in shape.

[0012] Furthermore, the upper and lower ends of the annular flow guide frame have a strip-shaped profile.

[0013] Furthermore, a Coanda curved surface is provided next to the annular air outlet.

[0014] Furthermore, the upper part of the turbocharger chamber is connected to the annular cavity through the guide cavity, and the lower part of the turbocharger chamber is also connected to the annular cavity through the guide cavity.

[0015] Furthermore, the flow guiding cavity is a cavity with a variable cross-section, and the cross-section of the flow guiding cavity gradually increases from the first end to the second end.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a bladeless cooling fan for a fuel cell system. Gas, under the action of a turbocharger, enters the guide chamber, then passes through the guide chamber into an annular cavity, and is finally blown out from a narrow annular outlet. Due to the Coanda effect, the gas exiting the annular outlet flows rapidly along the curved surface of the annular guide frame, creating a negative pressure in the middle of the annular guide frame. This allows gas outside the annular guide frame to continuously pass through the negative pressure area. This invention fully utilizes negative pressure to achieve low-noise airflow and relatively uniform air volume.

[0017] This invention eliminates the bladed structure of traditional cooling fans (the negative pressure flow area of ​​this invention has no blades), which reduces noise generation during fan operation and ensures stable airflow. This bladeless cooling fan can be installed on the water tank of a hydrogen fuel cell air-cooling system to perform its heat dissipation function. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a first-person perspective three-dimensional schematic diagram of the "bladeless cooling fan" of this utility model; Figure 2 This is a three-dimensional schematic diagram of the wireframe pattern of the "bladeless cooling fan" of this utility model; Figure 3 This is a front view of the "bladeless cooling fan (back)" of this utility model; Figure 4 yes Figure 3 Sectional view at AA; Figure 5 yes Figure 3 Sectional view at BB; Figure 6 This is a schematic diagram of the accelerated flow of gas along the Coanda surface at the annular air outlet.

[0019] Figure label: 1-Bladeless cooling fan; 2-Annular airflow guide frame; 3-Turbocharger; 4-Turbocharger chamber; 41-Air inlet; 5-Airflow guide cavity; 6-Annular cavity; 7-Annular air outlet; 8-Negative pressure flow area; 9-Kornda surface; AA-Sectional view symbol; BB-Sectional view symbol. Detailed Implementation

[0020] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0021] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0022] Reference Figures 1 to 6A bladeless cooling fan 1 for a fuel cell system includes an annular guide frame 2 and a turbocharger 3; the annular guide frame 2 is provided with a turbocharger chamber 4, and the turbocharger 3 is disposed in the turbocharger chamber 4 for drawing in air; the annular guide frame 2 is provided with a guide cavity 5, an annular cavity 6, an annular air outlet 7 and a negative pressure flow area 8, the turbocharger chamber 4 is connected to the annular cavity 6 through the guide cavity 5, and the annular cavity 6 is connected to the negative pressure flow area 8 through the annular air outlet 7.

[0023] Reference Figures 1 to 6 In one embodiment, the turbocharger chamber 4 (back) is provided with an air inlet 41, which is connected to the outside and is used to allow air to enter the turbocharger chamber 4.

[0024] Reference Figures 1 to 6 In one embodiment, the turbocharger chamber 4 has a circular outline.

[0025] Reference Figures 1 to 6 In one embodiment, the annular flow guide frame 2 is provided with several negative pressure flow areas 8; a turbocharger chamber 4 is provided between adjacent negative pressure flow areas 8.

[0026] Reference Figures 1 to 6 In one embodiment, the negative pressure flow area 8 is provided in three locations, and the turbocharger chamber 4 is provided in two locations, with the turbocharger 3 provided in each turbocharger chamber 4.

[0027] Reference Figure 3 In one embodiment, the left and right ends of the annular flow guide frame 2 are both semi-circular.

[0028] Reference Figure 3 In one embodiment, the upper and lower ends of the annular flow guide frame 2 are strip-shaped contours. Preferably, the semi-circular contours are combined with the strip-shaped contours, so that the overall shape of the annular flow guide frame 2 is "oval".

[0029] Reference Figures 3 to 6 In one embodiment, a Coanda surface 9 is provided next to the annular air outlet 7.

[0030] Reference Figure 2 and Figure 3 In one embodiment, the upper part of the turbocharger chamber 4 is connected to the annular cavity 6 through the guide cavity 5, and the lower part of the turbocharger chamber 4 is also connected to the annular cavity 6 through the guide cavity 5.

[0031] Reference Figure 3 In one embodiment, the flow guiding cavity 5 is a cavity with a variable cross-section, and the cross-section of the flow guiding cavity 5 gradually increases from the first end to the second end.

[0032] Reference Figures 1 to 6 In one embodiment, the working principle of the bladeless cooling fan 1 of this utility model is as follows: Under the action of the turbocharger 3, the gas enters the turbocharger chamber 4 from the intake port 41, then enters the guide cavity 5, and then enters the annular cavity 6 through the guide cavity 5. The gas is then blown out from the "narrow" annular outlet 7. Due to the Coanda effect (its schematic diagram is shown in 6), the gas coming out of the annular outlet 7 will continue to flow "rapidly" along the Coanda surface 9, thereby forming a negative pressure zone. Under the action of negative pressure, external gas will continuously pass through the negative pressure flow area 8.

[0033] This invention relates to a bladeless cooling fan for fuel cell systems. It delivers air via a turbocharger and utilizes a Kodak surface at the annular outlet to create negative pressure, thus achieving stable airflow. This invention eliminates the bladed structure of traditional cooling fans (the negative pressure flow area of ​​this invention has no blades), effectively reducing noise during airflow. Furthermore, compared to traditional bladed fans, the bladeless cooling fan provides a more stable and uniform airflow, making it more beneficial for cooling the water tank in air-cooled systems. Moreover, compared to traditional bladed fans, this bladeless cooling fan requires only one person for quick and easy maintenance, making up for its convenience.

[0034] Other aspects of the bladeless cooling fan for fuel cell systems described in this utility model are available in the prior art and will not be repeated here.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A bladeless cooling fan for a fuel cell system, characterized in that, It includes an annular guide frame and a turbocharger; the annular guide frame is provided with a turbocharger chamber, and the turbocharger is disposed in the turbocharger chamber for drawing in air; the annular guide frame is provided with a guide cavity, an annular cavity, an annular air outlet and a negative pressure flow area, the turbocharger chamber is connected to the annular cavity through the guide cavity, and the annular cavity is connected to the negative pressure flow area through the annular air outlet.

2. The bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, The turbocharger chamber is provided with an air inlet, which is connected to the outside and is used to supply air into the turbocharger chamber.

3. A bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, The turbocharger has a circular outline.

4. A bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, The annular guide frame is provided with several negative pressure flow areas; a turbocharger chamber is provided between adjacent negative pressure flow areas.

5. A bladeless cooling fan for a fuel cell system according to claim 4, characterized in that, The negative pressure flow area is provided in three places, and the turbocharger chamber is provided in two places. Each turbocharger chamber is equipped with a turbocharger.

6. A bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, The left and right ends of the annular flow guide frame are both semi-circular.

7. A bladeless cooling fan for a fuel cell system according to claim 6, characterized in that, The upper and lower ends of the annular flow guide frame have a strip-shaped profile.

8. A bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, A Korndahl surface is provided next to the annular air outlet.

9. A bladeless cooling fan for a fuel cell system according to claim 1, characterized in that, The upper part of the turbocharger chamber is connected to the annular cavity through the guide cavity, and the lower part of the turbocharger chamber is also connected to the annular cavity through the guide cavity.

10. A bladeless cooling fan for a fuel cell system according to any one of claims 1 to 9, characterized in that, The flow guide cavity is a cavity with a variable cross-section, and the cross-section of the flow guide cavity gradually increases from the first end to the second end.

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