High pressure electronic centrifugal fan

Abstract

This utility model relates to the field of fuel cell technology and proposes a high-pressure electronic centrifugal fan. The fan comprises a drive motor, fan blades, a volute, a flow guide device, and a sound insulation layer. The volute has an air intake channel and an exhaust channel, and the flow guide device is connected to the air intake channel of the volute. The sound insulation layer covers the flow guide device and the exhaust channel of the volute. This high-pressure electronic centrifugal fan can achieve axial air intake and radial exhaust, optimizing space configuration while improving gas transport efficiency, reducing energy consumption, and lowering noise generated during fan operation. It is suitable for heat dissipation in fuel cell systems.

Description

Technical Field

[0001] This utility model generally relates to the field of fuel cell technology. Specifically, this utility model relates to a high-pressure electronic centrifugal fan for heat dissipation in a fuel cell system. Background Technology

[0002] During the operation of hydrogen fuel cell vehicles, the fuel cell system requires a large amount of high-pressure air to participate in the electrochemical reaction, and the heat generated by the reaction must be dissipated in a timely manner to maintain stable system operation. Therefore, fans are needed in the cooling system to transport high-pressure gas. Cooling fans are mainly divided into two categories: traditional axial fans and new centrifugal fans. Traditional axial fans are widely used, but they have inherent limitations in air pressure lifting capacity and low static pressure efficiency, making it difficult to meet the high-pressure gas transport requirements of fuel cell systems. New centrifugal fans have the advantages of high static pressure efficiency and low energy consumption, but when centrifugal fans are working, the noise generated by the motor and the noise generated by the friction between the impeller, blades and air can cause significant noise problems. Patent CN110159555A discloses a low-noise, high-efficiency, and energy-saving centrifugal fan, which reduces the external noise generated by the fan casing and drive unit through an external soundproof enclosure and vibration damping platform. However, when applied to fuel cell systems, under high temperature and high pressure environments, the closed structure of the external enclosure can hinder the rapid dissipation of heat, leading to heat accumulation inside the enclosure, which can easily cause the motor to overheat, thus affecting its efficiency and service life. Utility Model Content

[0003] Based on existing technology, the objective of this utility model is to propose a high-pressure electronic centrifugal fan. Through the centrifugal fan, airflow can be axially introduced and radially discharged, thereby improving the fuel cell system's requirement for high-pressure gas delivery. Furthermore, without affecting airflow, the noise generated by the fan operation is reduced.

[0004] According to this utility model, the above-mentioned task is accomplished by a high-voltage electronic centrifugal fan. The centrifugal fan includes: A flow guide device, which is arranged ahead of the volute in the airflow path and configured to guide the airflow into the volute; and A volute, connected to a flow guide and configured to collect and guide airflow outwards, wherein the volute comprises: An air intake passage, which is connected to a deflector and oriented axially along the shaft of the fan blades; and The exhaust passage is oriented radially towards the axis of rotation of the fan blade; Fan blades, arranged within a volute and configured to rotate and drive airflow; and A drive motor, which is configured to drive the fan blades to rotate.

[0005] Furthermore, the fan also includes a sound insulation layer arranged in the airflow path before the airflow guide and / or after the volute and configured to reduce the noise generated by the operation of the centrifugal fan.

[0006] Furthermore, the airflow deflector is configured in a trumpet shape, and its size decreases as it approaches the fan blade.

[0007] Furthermore, the centrifugal fan impeller hub ratio is 0.4-0.5.

[0008] Furthermore, the wind turbine blade is configured to include 15 backward-curved blades evenly distributed circumferentially, and the blade inlet installation angle is set to 25° and the outlet installation angle is set to 38°, and the installation angle of the blade from the inlet to the outlet is set to increase non-linearly.

[0009] Furthermore, the flow resistance of the sound insulation layer ranges from 8×10³ to 18×10³ Pa·s / m².

[0010] Furthermore, the sound insulation layer includes: A first sound insulation layer, which is arranged behind the volute in the airflow path and covers the exhaust passage of the volute; and The second sound insulation layer is arranged in front of the airflow guide device and covers the air inlet of the airflow guide device in the airflow path.

[0011] Furthermore, the material of the sound insulation layer includes soft polyurethane cotton.

[0012] Furthermore, the fan blades include: A shaft hole, configured to connect a rotating shaft; and Multiple blades, wherein there are gaps between adjacent blades, the gaps are curved, and the edges of the blades form a circular outline.

[0013] This invention proposes a high-pressure electronic centrifugal fan for heat dissipation in fuel cell systems, which has at least the following beneficial effects: First, this invention enables axial airflow entry and radial exhaust. By vertically changing the intake and exhaust direction, when applied to fuel cell vehicles, it can especially achieve air intake from the front of the vehicle and exhaust from the side, providing vehicle engineers with more space for layout. Compared to traditional axial fans, this invention has higher static pressure efficiency, lower energy consumption, and higher efficiency. When applied to fuel cell cooling systems, it helps improve the heat dissipation performance of the radiator. Moreover, because the inlet suction area of ​​the centrifugal fan is larger than that of an axial fan of the same diameter (the hub area of ​​an axial fan is not ventilated), it further enhances the heat dissipation performance of the radiator. Second, this invention further reduces the noise generated by the fan operation without affecting airflow by incorporating low-resistance sound-insulating materials along the airflow entry and exhaust paths. Attached Figure Description

[0014] To further illustrate the advantages and features of the various embodiments of this invention, a more detailed description of the embodiments will be presented with reference to the accompanying drawings. It is understood that these drawings depict only typical embodiments of the invention and are therefore not intended to limit its scope. In the drawings, identical or corresponding parts will be indicated by the same or similar reference numerals for clarity.

[0015] Figure 1 A schematic diagram of the structure of a high-voltage electronic centrifugal fan according to one embodiment of the present invention is shown; Figure 2 A schematic diagram of the blade structure of a high-voltage electronic centrifugal fan according to one embodiment of the present invention is shown; Figure 3 This diagram illustrates the operation of a high-voltage electronic centrifugal fan in a heat dissipation system according to one embodiment of the present invention. List of reference numerals 100 High-Pressure Electronic Centrifugal Fan 1. Drive motor 2 Wind blades 3. Snail shell 4. Flow guiding device 5. Heatsink Module 6 First sound insulation layer 7 Second sound insulation layer Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the components in the drawings may be shown exaggeratedly for illustrative purposes and are not necessarily to scale.

[0016] In this utility model, the various embodiments are merely intended to illustrate the solution of this utility model and should not be construed as limiting.

[0017] In this utility model, unless otherwise specified, the quantifiers “one” and “one” do not exclude scenarios involving multiple elements.

[0018] It should also be noted that in the embodiments of this utility model, only a portion of the parts or components may be shown for clarity and simplicity. However, those skilled in the art will understand that, under the teachings of this utility model, the required parts or components can be added according to the specific scenario.

[0019] It should also be noted that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not explicitly or implicitly suggest that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In this invention, the terms "axial" and "radial" unless otherwise specified refer to the axial and radial axes of rotation of the fan blade (i.e., the blade).

[0021] In this invention, the term "trumpet-shaped" encompasses all structures with progressively smaller dimensions, such as circular trumpets, elliptical trumpets, and square trumpets. Furthermore, "trumpet-shaped" should be understood as a hollow structure, meaning it has an inlet and an outlet with a hollow connection between them.

[0022] In this invention, the term "blade inlet" is defined as the blade closest to the intake passage, and the term "blade outlet" is defined as the blade closest to the exhaust passage.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 A schematic diagram of a high-voltage electronic centrifugal fan according to one embodiment of the present invention is shown. Figure 1 As shown, the high-voltage electronic centrifugal fan 100 includes a drive motor 1, a fan blade 2, a volute 3, a flow guide device 4, a first sound insulation layer 6, and a second sound insulation layer 7. It should be noted that the first and second sound insulation layers 6 and 7 are optional. The output end of the drive motor 1 is connected to the fan blade 2 and is disposed in the volute 3. The volute 3 is provided with an air intake channel and an exhaust channel. The air intake channel is perpendicular to the plane of rotation of the fan blade 2, i.e., arranged axially on the fan blade shaft, and the exhaust channel is parallel to the plane of rotation of the fan blade 2, i.e., arranged radially on the fan blade shaft. The fan blade 2 is a centrifugal fan blade, which needs to convert the axially drawn airflow into radially discharged airflow. The flow guide device 4 is a hollow frustum or trumpet-shaped device, with its smaller radius end connected to the air intake channel of the volute 3, and its larger radius end covered by the second sound insulation layer 7, while the first sound insulation layer 6 covers the exhaust channel of the volute 3. The material of the sound insulation layer is a porous elastic material, such as soft polyurethane cotton.

[0025] Figure 2A schematic diagram of the blade structure of a high-voltage electronic centrifugal fan according to one embodiment of the present invention is shown. Figure 2 As shown, in order to improve static pressure efficiency and reduce energy consumption, in one embodiment of this utility model, the impeller hub ratio of the centrifugal fan 100 is 0.4-0.5, the fan blade 2 is composed of 15 blades arranged together, the blade inlet installation angle is set to 25°, the blade outlet installation angle is set to 38°, and the installation angle of the blade from the inlet to the outlet is set to a quadratic function nonlinearly increasing, so as to achieve low-loss airflow.

[0026] Figure 3 A schematic diagram of a high-voltage electronic centrifugal fan operating in a heat dissipation system according to one embodiment of the present invention is shown. Figure 3 As shown, in one embodiment of this utility model, the air intake channel of the high-voltage electronic centrifugal fan 100 faces the heat sink module 5. When the fan starts running, the drive motor 1 drives the fan blades 2 to rotate at high speed. Under the guidance of the guide device 4, the gas is gathered and drawn into the fan, achieving axial air intake. Driven by the fan blades 2 and guided by the volute 3, the gas entering the centrifugal fan is discharged along the radial exhaust channel, achieving radial exhaust. The gas passes through the second sound insulation layer 7 and the first sound insulation layer 6 successively during entry and exit. Since both the first sound insulation layer 6 and the second sound insulation layer 7 are composed of low flow resistance sound insulation materials, their impact on the gas flow rate is small. At the same time, since the sound insulation material covers the fan's air intake and exhaust channels, it can effectively reduce the noise generated by the operation of the drive motor and the friction between the blades and the airflow. Meanwhile, the centrifugal fan as a whole is still in an open space, and the presence of the sound insulation layer does not affect its own heat dissipation.

[0027] Although various embodiments of the present invention have been described above, it should be understood that they are presented by way of example only and not as limitations. It will be apparent to those skilled in the art that various combinations, modifications, and alterations can be made without departing from the spirit and scope of the present invention. Therefore, the breadth and scope of the present invention disclosed herein should not be limited by the exemplary embodiments disclosed above, but should be defined solely by the appended claims and their equivalents.

Claims

1. A high-voltage electronic centrifugal fan, characterized in that, include: A flow guide device is arranged in the airflow path before the volute and configured to guide the airflow into the volute. as well as A volute, connected to a flow guide and configured to collect and guide airflow outwards, wherein the volute comprises: An air intake passage, which is connected to a deflector and oriented axially along the shaft of the fan blades; and The exhaust passage is oriented radially towards the axis of rotation of the fan blade; Fan blades, arranged within a volute and configured to rotate and drive airflow; and A drive motor is configured to drive the fan blades to rotate, wherein the air guide is constructed in a trumpet shape and its size decreases as it approaches the fan blades; the fan blades are configured to include 15 backward-curved blades evenly distributed circumferentially, and the inlet installation angle of the blades is set to 25° and the outlet installation angle is set to 38°, and the installation angle of the blades from the inlet to the outlet is set to increase non-linearly.

2. The centrifugal fan according to claim 1, characterized in that, It also includes a sound insulation layer, which is arranged in the airflow path before the air guide and / or after the volute and is configured to reduce the noise generated by the operation of the centrifugal fan.

3. The centrifugal fan according to claim 1, characterized in that, The drive motor and the fan blade are housed inside the volute.

4. The centrifugal fan according to claim 3, characterized in that, Its impeller hub ratio is 0.4-0.

5.

5. The centrifugal fan according to claim 2, characterized in that, The flow resistance range of the sound insulation layer is 8×10³-18×10³Pa·s / m².

6. The centrifugal fan according to claim 5, characterized in that, The sound insulation layer includes: A first sound insulation layer, which is arranged behind the volute in the airflow path and covers the exhaust passage of the volute; and The second sound insulation layer is arranged in front of the airflow guide device and covers the air intake channel of the airflow guide device in the airflow path.

7. The centrifugal fan according to claim 6, characterized in that, The sound insulation layer is made of soft polyurethane cotton.

8. The centrifugal fan according to claim 4, characterized in that, The fan blades include: A shaft hole, configured to connect a rotating shaft; and Multiple blades, wherein there are gaps between adjacent blades, the gaps are curved, and the edges of the blades form a circular outline.

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