CN217518946U

CN217518946U - Cooling fan

Info

Publication number: CN217518946U
Application number: CN202221507740.0U
Authority: CN
Inventors: 堀干也; 野中孝树; 刘伟峻
Original assignee: Nidec Intelligent Research Institute Pinghu Co ltd; Nidec Techno Motor Corp
Current assignee: Nidec Intelligent Research Institute Pinghu Co ltd; Nidec Techno Motor Corp
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-09-30
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to a cooling fan technical field provides a cooling fan, include: the fan comprises a motor, an impeller and a fan shell for accommodating the motor and the impeller, wherein the motor is fixed on the fan shell and drives the impeller to rotate, the fan shell is provided with an air inlet positioned in the center and an air outlet extending towards the circumferential tangential direction, the fan shell is composed of two parts which are overlapped in the axial direction, a tongue part is formed at the position, close to the radial inner side, of the air outlet, the impeller is in a cylindrical shape extending in the axial direction, a plurality of blades are arranged along the circumferential direction, the radial outer sides of the blades are provided with concave-convex structures, and the tongue part and at least one part of the concave-convex structures are overlapped in the radial direction. The utility model discloses can reduce the cooling fan noise, improve cooling fan's the amount of wind simultaneously.

Description

Cooling fan

Technical Field

The utility model relates to a cooling fan technical field especially relates to a cooling fan.

Background

The cooling fan is mainly used for dissipating heat of the power system. For example, a cooling fan is an important component of a vehicle cooling system, and the performance of the fan directly affects the heat dissipation effect of the engine, and further affects the performance of the engine. If the fan is not properly selected, the engine may be insufficiently or excessively cooled, which may deteriorate the working environment of the engine, and further affect the performance and the service life of the engine. At present, in the cooling fan with common blades and another cooling fan adopting a single-side suction type in the prior art, the blades are made of metal, and the two fans have the problems of large noise and insufficient air volume due to the design of the blades.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the cooling fan noise of mainly solving prior art is big, the not enough technical problem of the amount of wind, provides a cooling fan to reach the purpose that increases the fan amount of wind under the noise that reduces the fan during operation and the condition of equal power.

The utility model provides a cooling fan, include: the fan comprises a motor, an impeller and a fan shell for accommodating the motor and the impeller, wherein the motor is fixed on the fan shell and drives the impeller to rotate, the fan shell is provided with an air inlet positioned in the center and an air outlet extending towards the circumferential tangential direction, the fan shell is composed of two parts which are overlapped in the axial direction, a tongue part is formed at the position, close to the radial inner side, of the air outlet, the impeller is in a cylindrical shape extending in the axial direction, a plurality of blades are arranged along the circumferential direction, a concave-convex structure is formed at the radial outer side of each blade, and the tongue part is overlapped with at least one part of the concave-convex structure in the radial direction.

Further, the impeller consists of two parts with the same radial diameter but different axial heights; the fan casing is formed by fixedly connecting two parts with the same radial diameter and axial height; the joint of the two parts of the impeller is not coincident with the joint of the two parts of the fan shell.

Furthermore, a motor supporting frame is arranged in the fan shell; the motor support frame and the bottom of the fan shell form a space for accommodating the motor.

Furthermore, an induced draft plate is arranged on the upper edge of the air outlet; the induced draft plate is parallel to the upper edge and the lower edge of the air outlet.

Further, the tongue is higher than the lower edge of the air outlet.

Furthermore, protruding parts are respectively arranged on two sides of the inner wall of the opening of the air outlet; the protruding part is positioned on a tangent plane parallel to the upper edge and the lower edge of the impeller and the air outlet.

The utility model provides a pair of cooling fan through the unsmooth of design cockscomb structure on fan blade to through the tip with the impeller more be close to the tongue, increase the external diameter of impeller and reduce the interference of blade outer end and casing tongue, reach the effect that reduces the fan noise, through enlarging the blade, improve the amount of wind of fan simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of a cooling fan provided by the present invention;

fig. 2 is a schematic perspective view of a cooling fan according to the present invention (hidden fan casing);

fig. 3 is a schematic front view of the cooling fan according to the present invention (hidden fan casing);

fig. 4 is a schematic structural diagram of a cooling fan provided by the present invention (hiding a fan casing and an impeller);

fig. 5 is a schematic structural view of the cooling fan outlet side (hidden fan casing) provided by the present invention;

fig. 6 is a schematic structural view of the fan outlet side of the cooling fan provided by the present invention;

FIG. 7 is a noise contrast diagram for cooling fans of the present invention and prior art;

fig. 8 is a noise comparison table of the cooling fan of the present invention and the prior art.

Detailed Description

In order to make the technical problems, the technical solutions adopted and the technical effects achieved by the present invention clearer, the following description is made in conjunction with the accompanying drawings and embodiments for further details of the present invention. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.

As shown in fig. 1, the embodiment of the present invention provides a cooling fan including: the fan comprises a motor 1, an impeller 2, and a fan housing 3 accommodating the motor and the impeller, wherein the motor 1 is fixed to the fan housing 3 and drives the impeller 2 to rotate, the fan housing 3 has an air inlet 31 positioned at the center and an air outlet 32 extending in the circumferential tangential direction, the fan housing 3 is composed of two parts overlapping in the axial direction, as shown in fig. 3, a tongue portion 33 is formed at a position close to the inner side in the radial direction of the air outlet 32, the impeller 2 is cylindrical and extends in the axial direction, a plurality of blades 21 are arranged in the circumferential direction, as shown in fig. 2 and 5, a concave-convex structure is formed at the outer side in the radial direction of the blades 21, and the tongue portion 33 and at least a part of the concave-convex structure overlap in the radial direction. The fan blade is provided with the zigzag concave-convex parts, the end part of the impeller is closer to the tongue part, the outer diameter of the impeller is increased, the interference between the outer end of the blade and the tongue part of the casing is reduced, and the effect of reducing the noise of the fan is achieved.

In the present embodiment, as shown in fig. 5, the impeller 2 is composed of two parts with the same radial diameter but different axial heights; the fan shell 3 is formed by fixedly connecting two parts with the same radial diameter and axial height; the joint of the two parts of the impeller 2 and the joint of the two parts of the fan housing 3 do not overlap with each other, so that the effect of preventing interference can be achieved.

In this embodiment, as shown in fig. 4, a motor support frame 35 is disposed in the fan housing 3; the motor support frame 35 and the bottom of the fan housing 3 form a space for accommodating the motor 1. Motor support frame 35 can effectively play the effect fixed to motor 1, and when the design man-hour, also can make casing 3 the latter half upwards outstanding, forms the space that holds the motor to reduce the axial dimensions of fan.

In this embodiment, as shown in fig. 2, an induced draft plate 4 is disposed on the upper edge of the air outlet 32; the induced draft plate 4 is parallel to the upper and lower edges of the air outlet 32. The air guide plate 4 can guide the wind, and at the same time, the wind blown by the fan can be uniformly distributed in a certain range.

In this embodiment, as shown in fig. 3, the tongue portion 33 is higher than the lower edge of the air outlet 32, which has an effect of reducing wind noise.

In the present embodiment, as shown in fig. 6, two sides of the inner wall of the mouth of the air outlet 32 are respectively provided with a protrusion 34; the protruding part 34 is located on the section of the impeller 2 parallel to the upper and lower edges of the air outlet 32. The protrusions 34 at both sides of the air outlet 32 can prevent turbulent flow.

As shown in FIG. 7 and FIG. 8, it can be seen through simulation test that the cooling risk of the present invention and the prior art has the noise reduction contrast at work, 13.7dB noise reduction at 3200rpm, and 4.9dB noise reduction as a whole.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, without substantially departing from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cooling fan, characterized in that the cooling fan comprises:

a motor (1), an impeller (2), and a fan housing (3) accommodating the motor and the impeller,

the method is characterized in that:

the motor (1) is fixed on the fan shell (3) and drives the impeller (2) to rotate,

the fan shell (3) is provided with an air inlet (31) positioned in the center and an air outlet (32) extending towards the circumferential tangential direction,

the fan casing (3) is composed of two parts which are overlapped in the axial direction, a tongue part (33) is formed at the position close to the radial inner side of the air outlet (32),

a plurality of blades (21) arranged in a cylindrical shape extending in the axial direction of the impeller (2) and arranged in the circumferential direction,

a concave-convex structure is formed on the radial outer side of the blade (21), and the tongue portion (33) and at least one part of the concave-convex structure are overlapped in the radial direction.

2. A cooling fan according to claim 1, characterised in that the impeller (2) is composed of two parts of the same radial diameter but different axial height; the fan casing (3) is formed by fixedly connecting two parts with the same radial diameter and axial height; the joint of the two parts of the impeller (2) is not coincident with the joint of the two parts of the fan shell (3).

3. A cooling fan according to claim 1, wherein a motor support frame (35) is provided in the fan housing (3); the motor support frame (35) and the bottom of the fan shell (3) form a space for accommodating the motor (1).

4. A cooling fan according to claim 1, wherein an air guide plate (4) is provided at an upper edge of the air outlet (32); the air guide plate (4) is parallel to the upper edge and the lower edge of the air outlet (32).

5. A cooling fan according to claim 1, wherein the tongue (33) is higher than a lower edge of the outlet opening (32).

6. The cooling fan according to claim 1, wherein the air outlet (32) has a protrusion (34) on each side of the inner wall of the outlet; the protruding part (34) is positioned on a tangent plane parallel to the upper edge and the lower edge of the impeller (2) and the air outlet (32).