Small centrifugal fan

Abstract

The utility model relates to a small centrifugal fan which comprises a fan single body and a shell module, a volute and a flow channel are integrally arranged in the shell module, a volute tongue is arranged at the joint of the volute and the flow channel, and an air outlet is correspondingly formed in the tail end of the flow channel. The fan single body is fixed to the shell module through a support, the fan single body comprises an impeller, and the position of the impeller corresponds to the position of the volute. The volute, the flow channel and the shell module are designed into a whole, so that the uniformity of the overall appearance and the stability of the internal structure are guaranteed, the occupied volume and space of the volute and the flow channel are effectively reduced, larger air volume is output under the condition of smaller occupied space, and the heat dissipation effect is improved; according to the utility model, the fan monomers are directly assembled in the shell module, so that the integrated assembly of an internal structure is realized, and the integrity of a heat dissipation system is enhanced; in addition, due to the integrated design, the probability that the fan goes wrong in the using process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air cooling equipment, in particular to a small centrifugal fan. Background Art

[0002] With the development of technology, fan products have more and more functions. Common fans on the market include hair dryers, small fans, high-power fans, etc. Among fan products, vortex fans are an important component, because the gas flow direction of turbo fans is perpendicular to the shaft, while the gas flow direction of common axial fans is parallel to the shaft. Compared with traditional axial fans, centrifugal fans can output larger air volume in a smaller space, improving the heat dissipation effect.

[0003] The volute is an important part of the centrifugal fan. It is used to collect the gas thrown out of the impeller and guide it to the fan outlet, and convert part of the dynamic pressure (kinetic energy) of the impeller outlet airflow into static pressure. However, existing small centrifugal fans have problems such as small backflow area and difficult installation of the volute. Utility Model Content

[0004] The utility model provides a small centrifugal fan to solve the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a small centrifugal fan, including a fan unit and a shell module, wherein a volute and a flow channel are integrally provided in the shell module, a volute tongue is provided at the connection between the volute and the flow channel, and an air outlet is correspondingly provided at the end of the flow channel; the fan unit is fixed to the shell module by a bracket, and the fan unit includes an impeller, and the position of the impeller corresponds to the position of the volute.

[0006] Preferably, the volute and the flow channel are cast and formed synchronously with the shell module.

[0007] Preferably, it further comprises a cover plate mounted on the housing module, wherein the cover plate covers the volute and the flow passage.

[0008] Preferably, the cover plate is provided with an air inlet, and the position of the air inlet corresponds to the position of the impeller.

[0009] Preferably, the cover plate is fixedly connected to the housing module by screws.

[0010] Preferably, the bracket is a screw.

[0011] Preferably, a sealing ring is provided around the bracket.

[0012] Preferably, the gap between the bracket and the housing module is filled with sealant.

[0013] Compared with the prior art, the small centrifugal fan provided by the utility model has the following advantages:

[0014] 1. The utility model integrates the volute, flow channel and housing module, which not only ensures the uniformity of the overall appearance and the stability of the internal structure, but also effectively reduces the volume and space occupied by the volute and the flow channel, realizes a larger air volume output in a smaller space, and improves the heat dissipation effect;

[0015] 2. The utility model directly assembles the fan unit into the housing module, realizes the integrated assembly of the internal structure, and strengthens the integrity of the heat dissipation system;

[0016] 3. The integrated design also reduces the probability of problems occurring during fan use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a small centrifugal fan in a specific implementation manner of the utility model;

[0018] Figure 2 This is a structural schematic diagram of a small centrifugal fan in a specific implementation manner of the utility model (with the cover removed).

[0019] In the figure: 10 - fan unit, 11 - impeller, 20 - housing module, 21 - volute, 22 - volute tongue, 23 - flow channel, 24 - air outlet, 30 - bracket, 31 - sealing ring, 40 - cover plate, 41 - air inlet. DETAILED DESCRIPTION

[0020] In order to describe the technical solution of the above utility model in more detail, specific embodiments are listed below to demonstrate the technical effect; it should be emphasized that these embodiments are used to illustrate the utility model but not to limit the scope of the utility model.

[0021] The small centrifugal fan provided by the utility model is as follows Figure 1 and Figure 2As shown, it includes a fan unit 10 and a housing module 20, wherein the housing module 20 is provided with a volute 21 and a flow channel 23 in an integrated manner, wherein a volute tongue 22 is provided at the connection between the volute 21 and the flow channel 23, and an air outlet 24 is provided at the end of the flow channel 23; the fan unit 10 is fixed to the housing module 20 through a bracket 30, and the fan unit 10 includes an impeller 11, and the position of the impeller 11 corresponds to the position of the volute 21. The utility model integrates the volute 21, the flow channel 23 and the housing module 20, which not only ensures the uniformity of the overall appearance and the stability of the internal structure, but also effectively reduces the volume and space occupied by the volute 21 and the flow channel 23, thereby achieving a larger air volume output with a smaller space occupation, and improving the heat dissipation effect; the utility model directly assembles the fan unit 10 into the housing module 20, realizes the integrated assembly of the internal structure, and strengthens the integrity of the heat dissipation system; in addition, the integrated design also reduces the probability of problems occurring in the fan during use.

[0022] In some embodiments, the volute 21 and the flow channel 23 are cast and formed synchronously with the housing module 20, so that no space is occupied due to assembly, which solves the problem of insufficient installation space, thereby improving the reliability of the fan product. The utility model also omits the installation and space occupation of the volute 21 and the flow channel 23 in the prior art by forming the volute 21 and the flow channel 23 synchronously with the housing module 20, thereby improving the space utilization rate, increasing the flow guide area inside the volute 21, and forming a vortex flow when the airflow passes through, so that the kinetic energy of the gas can be better converted into static pressure; and the internal flow channel can be increased to allow the gas to flow fully.

[0023] In some embodiments, please refer to Figure 1 The small centrifugal fan further includes a cover plate 40 mounted on the housing module 20. The cover plate 40 covers the volute 21 and the flow channel 23 to provide protection and prevent water and dust.

[0024] In some embodiments, please refer to Figure 1 The cover plate 40 is provided with an air inlet 41, and the position of the air inlet 41 corresponds to the position of the impeller 11. The air enters the volute 21 from the air inlet 41, and is diverted by the volute tongue 22. Most of the air flows to the air outlet 24 through the flow channel 23, and a small part flows back to the volute 21. After rotating one circle with the impeller 11 in the volute 21, the air returns to the volute tongue 21 to participate in a new round of diversion.

[0025] In some embodiments, the cover plate 40 can be fixedly connected to the housing module 20 by screws to achieve quick installation and fixation.

[0026] In some embodiments, please refer to Figure 2The bracket 30 can be screwed to realize the quick installation of the fan unit 10 and the housing module 20. The utility model can make the fan unit 10 and the volute 21 more closely combined by setting the bracket 30.

[0027] In some embodiments, please refer to Figure 2 , a sealing ring 31 is provided around the bracket 30 to effectively prevent air leakage of the fan and further enhance its stability. In some embodiments, the gap between the bracket 30 and the housing module 20 is also filled with sealant (not shown) to further improve the sealing and increase the IP level (i.e., the protection level of the electrical equipment housing against foreign objects).

[0028] In summary, the small centrifugal fan provided by the utility model comprises a fan unit 10 and a housing module 20, wherein the housing module 20 is provided with a volute 21 and a flow channel 23 in an integrated manner, wherein a volute tongue 22 is provided at the connection between the volute 21 and the flow channel 23, and an air outlet 24 is provided at the end of the flow channel 23; the fan unit 10 is fixed to the housing module 20 through a bracket 30, and the fan unit 10 comprises an impeller 11, and the position of the impeller 11 corresponds to the position of the volute 21. The utility model designs the volute 21, the flow channel 23 and the housing module 20 as one body, which not only ensures the uniformity of the overall appearance and the stability of the internal structure, but also effectively reduces the volume and space occupied by the volute 21 and the flow channel 23, thereby achieving a larger air volume output with a smaller space occupation, and improving the heat dissipation effect; the utility model directly assembles the fan unit 10 into the housing module 20, thereby achieving an integrated assembly of the internal structure and strengthening the integrity of the heat dissipation system; in addition, the integrated design also reduces the probability of problems occurring in the fan during use.

[0029] Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. A small centrifugal fan, characterized in that: It includes a fan unit and a shell module, wherein a volute and a flow channel are integrally provided in the shell module, a volute tongue is provided at the connection between the volute and the flow channel, and an air outlet is correspondingly provided at the end of the flow channel; the fan unit is fixed to the shell module through a bracket, and the fan unit includes an impeller, and the position of the impeller corresponds to the position of the volute.

2. The small centrifugal fan according to claim 1, characterized in that: The volute and the flow channel are cast and formed synchronously with the shell module.

3. The small centrifugal fan according to claim 1 or 2, characterized in that: It also includes a cover plate installed on the shell module, and the cover plate covers the volute and the flow channel.

4. The small centrifugal fan according to claim 3, characterized in that: The cover plate is provided with an air inlet, and the position of the air inlet corresponds to the position of the impeller.

5. The small centrifugal fan according to claim 3, characterized in that: The cover plate is fixedly connected to the housing module by screws.

6. The small centrifugal fan according to claim 1, characterized in that: The bracket adopts screws.

7. The small centrifugal fan according to claim 1, characterized in that: A sealing ring is arranged around the bracket.

8. The small centrifugal fan according to claim 7, characterized in that: The gap between the bracket and the housing module is filled with sealant.

Images