CN2408284Y - cooling fan housing - Google Patents

Abstract

A housing base of a heat dissipation fan. In order to provide a heat dissipation fan component capable of reducing noise generated during rotation of a fan wheel and increasing ventilation volume, the utility model provides a base plate is provided with a positioning hole, an annular enclosure wall with a truncated cone-shaped inner wall is arranged in an extending way along the axial direction of the base plate, a seat plate is arranged in the range enclosed by the annular enclosure wall, and the center of the seat plate is provided with a tube seat for combining a stator and a coil and pivoting the fan wheel.

Description

cooling fan housing

The utility model belongs to components for ventilation and cooling devices, in particular to a cooling fan shell seat.

As shown in Figure 5, the traditional heat dissipation fan system includes the fan wheel 5 rotating in the inner ring wall 61 of the housing base 6, the inner ring wall 61 forms a seat plate 62 perpendicular to the bottom of the housing base 6, and the fan wheel 5 is combined with the seat plate 62, and form a non-contact small gap between the fan blade 51 of the fan wheel 5 and the inner ring wall 61 of the housing seat 6. Therefore, when the fan wheel 5 of the cooling fan with this structure rotates, wind shear noise is generated between the fan blades 51 and the inner ring wall 61 .

The purpose of the utility model is to provide a heat dissipation fan shell seat which can reduce the noise generated when the fan wheel rotates and increase the ventilation volume.

The utility model has a base plate with a positioning hole, a truncated conical ring wall with an inner wall extending axially from the base plate, a seat plate in the area surrounded by the ring wall, and a seat plate in the center of the seat plate. The stator, the coil are combined and the pipe seat of the fan wheel is pivotally connected.

in:

Corresponding to the positions of the positioning holes, holes are provided on the surrounding wall to facilitate the installation of the positioning elements.

The surrounding wall extends upwards from the base plate, and its inner wall surface is truncated and inverted conical. The base plate and the seat plate are located at the same level to form a large air inlet.

The surrounding wall extends downward from the base plate, and its inner wall surface is in the shape of a truncated right cone, and the seat plate is located under the base plate to form a larger air outlet.

The surrounding wall extends upward from the base plate, and the inner wall surface is connected by a truncated regular conical shape and a truncated inverted conical shape to form a surrounding wall with a small diameter in the middle and large diameters at both ends, and a seat plate is provided in the area surrounded by the surrounding wall , to form a larger air inlet and outlet.

Since the utility model has a base plate, a positioning hole is arranged on the base plate, and a truncated conical ring wall with an inner wall surface is axially extended from the base plate. Tube base for stator, coil combination and fan wheel pivoting. By virtue of the truncated conical inner wall surface of the surrounding wall, a height-varying gap is formed between the fan blades of the fan wheel and the inner wall surface of the surrounding wall, that is, an unequal gap. Therefore, the wind shear noise when the fan wheel rotates can be reduced. And the diameter of the tuyere can be increased to increase the ventilation volume. It can not only reduce the noise generated when the fan wheel rotates, but also increase the ventilation volume, so as to achieve the purpose of the utility model.

Fig. 1 is a schematic three-dimensional view of the structure of Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of the combined state of Embodiment 1 of the utility model and the fan wheel.

Fig. 3 is a sectional view of the second embodiment of the utility model combined with the fan wheel.

Fig. 4 is a cross-sectional view of the third embodiment of the utility model combined with the fan wheel.

Fig. 5 is a sectional view of a combination state of a conventional shell seat and fan wheel.

Below in conjunction with accompanying drawing, the utility model is set forth in further detail.

Embodiment one

As shown in FIG. 1 , the utility model 1 has a base plate 11 on which a positioning hole 12 is provided for the positioning element to pass through, and the cooling fan is fixed in an appropriate position by the positioning element pierced in the positioning hole 12 . From the base plate 11, an inner wall surface 18 is extended upwards to form a truncated inverted conical ring wall 13, and a seat plate 14 at the same level as the base plate 11 is provided in the area surrounded by the ring wall 13, and the seat plate 14 and the ring wall 13 are connected with several support rods 15. The gap between the support rod 15 and the seat plate 14 and the inner wall surface 18 of the surrounding wall 13 forms a channel for gas circulation. The center of the seat plate 14 is provided with a tube base 16 for combining the stator and the coil and pivotally connecting the fan wheel 2 . For easy screwing and assembly of positioning elements such as bolts, a hole 17 is provided on the surrounding wall 13 corresponding to the position of the positioning hole 12 .

As shown in Figure 2, the fan wheel 2 is pivotally mounted on the tube base 16, and the height of the fan wheel 2 can be equal to or not equal to that of the surrounding wall 13. The variable gap, that is, the unequal gap, therefore, can reduce the wind shear noise when the fan wheel 2 rotates, and the large air inlet is formed by the ring wall 13 being a truncated inverted conical inner wall surface 18, which can generate a larger air intake. air intake.

Embodiment two

As shown in FIG. 3 , the utility model 3 has a base plate 31 on which a positioning hole 32 for the positioning element to penetrate is provided, and the cooling fan is fixed in an appropriate position by the positioning element penetrated in the positioning hole 32 . From the base plate 31, an inner wall surface 36 is extended downwards to form a truncated right conical ring wall 33, and a seat plate 34 located below the base plate 31 is provided in the area surrounded by the ring wall 33, and the seat plate 34 is separated from the ring wall 33. Connect with several supporting rods 35. The gap between the support rod 35 and the seat plate 34 and the inner wall 36 of the surrounding wall 33 forms a channel for gas circulation, and the center of the seat plate 34 is provided with a tube seat for combining the stator and the coil and pivotally connecting the fan wheel. For easy screwing and assembly of positioning elements such as bolts, a hole 37 is provided on the surrounding wall 33 corresponding to the position of the positioning hole 32 . The fan wheel 2 is pivotally arranged on the pipe seat, and a gap along the height is formed between the upper fan blade 21 and the inner wall surface 36 of the surrounding wall 33, that is, the gap is not equidistant. Therefore, the wind shear noise when the fan wheel 2 rotates can be reduced. And by the inner wall surface 36 of the truncated cone shape of the surrounding wall 33, a large air outlet is formed, so as to generate a larger air volume.

Embodiment three

As shown in FIG. 4 , the utility model 4 has a base plate 41 on which a positioning hole 42 is provided for the positioning element to pass through, and the cooling fan is fixed in an appropriate position by the positioning element pierced in the positioning hole 42 . The base plate 41 extends upwards with an inner wall surface 46 that is connected by a truncated right conical shape and a truncated inverted conical shape to form a ring wall 43 with a small diameter in the middle and a large diameter at both ends. Plate 44, seat plate 44 and surrounding wall 43 are connected with several support rods 45. The gap between the support rod 45 and the seat plate 44 and the inner wall 46 of the surrounding wall 43 forms a channel for gas circulation, and the center of the seat plate 44 is provided with a tube seat for combining the stator and the coil and pivoting the fan wheel. For easy screwing and assembly of positioning elements such as bolts, a hole 47 is provided on the surrounding wall 43 corresponding to the position of the positioning hole 42 . Between the fan blade 21 of the fan wheel 2 and the inner wall of the surrounding wall 43, there is a height-varying gap, that is, an unequal gap. Therefore, the wind shear noise when the fan wheel 2 rotates can be reduced, and the middle diameter of the surrounding wall 43 can be reduced. The inner wall surface 46 which is small and has a large diameter at both ends forms larger air inlets and outlets, thereby generating larger air inlets and outlets.

By virtue of the truncated conical inner wall surface of the surrounding wall, a height-varying gap is formed between the fan blades of the fan wheel and the inner wall surface of the surrounding wall, that is, an unequal gap. Therefore, the wind shear noise when the fan wheel rotates can be reduced. And the diameter of the tuyere can be increased to increase the ventilation volume.

Claims (5)

1, a kind of radiating fan casing seat, it has substrate, and substrate is provided with positioning hole, to extending the ring enclosure wall, is provided with seat board from substrate axis in the scope of ring enclosure wall institute corral, and seat board central authorities are provided with the base for stator, coil combination and pivot joint impeller; It is characterized in that described ring enclosure wall internal face is frustroconical.

2, radiating fan casing seat according to claim 1 is characterized in that being provided with the hole of being convenient to the installing and locating element corresponding to position of positioning hole on the described ring enclosure wall.

3, radiating fan casing seat according to claim 1 and 2 is characterized in that described ring enclosure wall upwards extends from substrate, and inner wall surface thereof is the truncation turbination, and substrate and seat board are positioned at same horizontal position, to form big intake grill.

4, radiating fan casing seat according to claim 1 and 2 is characterized in that described ring enclosure wall extends from substrate downwards, and inner wall surface thereof is truncation normal cone shape, and seat board is positioned at the substrate below, to form big exhaust outlet.

5, radiating fan casing seat according to claim 1 and 2, it is characterized in that described ring enclosure wall upwards extends internal face from substrate and is by truncation normal cone shape and the truncation turbination linking formation ring enclosure wall that mid diameter is little, the two ends diameter is big, the seat board that is provided with in the scope of ring enclosure wall institute corral is bigger into and out of the air port to form.

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