Blowing fan with non-divergent flow channel

Abstract

The utility model discloses a blowing fan with a non-divergent flow channel, which comprises a base plate, a cover plate and a fan wheel, an air flow channel is formed between the base plate and the fan wheel, the air flow channel comprises a climbing section and an air collecting section, the lower end of the base plate is provided with an air outlet, and the inner wall of the base plate is also provided with a tongue opening. The air blowing fan has the advantages that air at the main air inlet evenly flows into the air blowing fan through the climbing section flow channels arranged at equal intervals, the pressure of air flow flowing into the air blowing fan is reduced, the noise reduction effect is achieved, the fan wheel stirs the air flow, heat conversion is completed, the air flow is rapidly exhausted towards the air outlet along the air collecting section, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan with a non-diverging flow channel. Background Technique

[0002] With the continuous development of electronic products, the working temperature of electronic products itself is rising faster and faster. Therefore, the heat dissipation efficiency of the fans used to cool electronic products needs to be continuously improved to adapt to more demanding heat dissipation environments.

[0003] A centrifugal fan is a device that transfers energy to a continuously flowing fluid by the power of the blades on the rotating impeller or drives the blades to rotate by the energy transmitted by the fluid. Traditional centrifugal fans are difficult to control the air intake volume, affect the wind speed, and are prone to generate noise, reducing the heat dissipation efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a centrifugal fan with a non-diverging flow channel to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A centrifugal fan with a non-diverging flow channel provided by the utility model includes a base plate, a cover plate and an impeller. A gas flow channel is formed between the base plate and the impeller. The gas flow channel includes a climbing section and a wind collecting section. The lower end of the base plate has an air outlet, and a tongue opening is also provided on the inner wall of the base plate.

[0007] Further, the tongue opening and the wind collecting section are respectively located on both sides of the air outlet.

[0008] Further, the lower edge of the climbing section extends to the tongue opening, and the climbing section is an equidistant flow channel.

[0009] Further, the wind collecting section is communicated with the climbing section, and the wind collecting section is located at the air outlet.

[0010] Further, the outer edge of the impeller is close to the tongue opening and the climbing section, and the lower end of the impeller protrudes from the tongue opening.

[0011] Further, secondary air inlets and a main air inlet are respectively provided on the base plate and the cover plate.

[0012] Beneficial effects: A centrifugal fan with a non-diverging flow channel uses an equidistant climbing section flow channel to uniformly introduce the gas at the main air inlet into the centrifugal fan, reducing the pressure of the gas flowing into the centrifugal fan, having a noise reduction effect. The impeller stirs the gas flow to complete heat conversion, and the gas flow quickly discharges from the wind collecting section to the air outlet, improving the heat dissipation effect. Description of the Drawings

[0013] Figure 1 This is an exploded view of the overall structure of the present utility model;

[0014] Figure 2 This is a schematic view of the partial structure of the present utility model.

[0015] Reference numerals

[0016] 1 - Substrate, 2 - Cover plate, 3 - Fan wheel, 4 - Climbing section, 5 - Air collecting section, 6 - Secondary air inlet, 7 - Main air inlet, 8 - Air outlet, 9 - Tongue opening. Specific embodiments

[0017] The following are specific embodiments of the present utility model and, in conjunction with the accompanying drawings, further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0018] Embodiment

[0019] As Figure 1-2 shown, a non - gradually expanding flow channel blower fan includes a substrate 1, a cover plate 2, and a fan wheel 3. A gas flow channel is formed between the substrate 1 and the fan wheel 3. The gas flow channel includes a climbing section 4 and an air collecting section 5. The lower end of the substrate 1 has an air outlet 8, and a tongue opening 9 is also provided on the inner wall of the substrate 1.

[0020] The tongue opening 9 and the air collecting section 5 are respectively located on both sides of the air outlet 8. According to the gas flow direction, the air flow enters from the main air inlet 7 and the secondary air inlet 6, successively passes through the climbing section 4 and the air collecting section 5, and then is discharged from the air outlet 8, forming an air flow path.

[0021] The lower edge of the climbing section 4 extends to the tongue opening 9. The climbing section 4 is an equidistant flow channel. The structural design of the fan wheel 3 close to the side wall of the substrate 1 forms an equidistant flow channel of the climbing section 4, obtaining a uniform air intake volume and flow rate, which is more conducive to the fan wheel 3 quickly rotating the air flow, preventing the air flow from gathering and generating noise. The air collecting section 5 is connected to the climbing section 4. The air collecting section 5 is located at the air outlet 8. The outer edge of the fan wheel 3 is close to the tongue opening 9 and the climbing section 4, and the lower end of the fan wheel 3 protrudes from the tongue opening 9, facilitating the discharge of the air flow through the air outlet 8, preventing the gas flowing into the blower fan from flowing back, and improving the heat dissipation efficiency.

[0022] In the present utility model, the gas at the main air inlet 7 uniformly flows into the blower fan through the equidistant flow channel of the climbing section 4, reducing the pressure of the air flow flowing into the blower fan, having a noise reduction effect. The fan wheel 3 stirs the air flow to complete the heat conversion. The air flow quickly discharges from the air collecting section 5 to the air outlet 8, and at the same time enables the blower fan to obtain greater driving efficiency and improves the heat dissipation effect.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A blower fan with a non-gradually diverging flow channel, comprising a base plate (1), a cover plate (2) and a fan wheel (3), characterized in that: A gas flow channel is formed between the base plate (1) and the impeller (3), the gas flow channel comprising a climbing section (4) and an air collecting section (5), the base plate (1) having an air outlet (8) at the lower end, the base plate (1) also having a tongue (9) on the inner wall, the lower edge of the climbing section (4) extending to the tongue (9), the climbing section (4) being an equidistant flow channel.

2. The blower fan with a non-gradually diverging flow channel according to claim 1, characterized in that: The tongue (9) and the air collecting section (5) are respectively located on both sides of the air outlet (8).

3. The blower fan with a non-gradually diverging flow channel according to claim 1, characterized in that: The air collecting section (5) is connected to the climbing section (4), and the air collecting section (5) is located at the air outlet (8).

4. The blower fan with a non-gradually diverging flow channel according to claim 1, characterized in that: The outer edge of the fan wheel (3) is arranged close to the tongue mouth (9) and the climbing section (4), and the lower end of the fan wheel (3) protrudes from the tongue mouth (9).

5. The blower fan with a non-gradually diverging flow channel according to claim 1, characterized in that: The base plate (1) and the cover plate (2) are respectively provided with a secondary air inlet (6) and a main air inlet (7).

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