Radiating rear cover of centrifugal fan

Abstract

The utility model relates to a heat dissipation rear cover of a centrifugal fan, which comprises a cover body, a heat dissipation part and a heat dissipation part, the chip mounted in the cover body is positioned at the bottom of the sunken part; a plurality of first radiating ribs at equal intervals are arranged at the concave part; the end parts of the plurality of first radiating ribs extend outwards to the outside of the cover body in parallel and are connected with an annular side part; an air inlet is formed between the bottom of the annular side part and the bottom of the cover body; the cover body located above the chip is sunken downwards to form the sunken part, so that the sunken part is close to the top surface of the chip, the heat dissipation area of the chip is increased, and heat of the chip is easily transferred to the side wall of the sunken part to realize heat dissipation; in addition, heat dissipation is accelerated through cooperation of the first heat dissipation ribs and the concave parts, and heat dissipation air channels are formed between the first heat dissipation ribs; when the fan blades rotate, the fan blades enter from the air inlet and are discharged through the gaps between the first heat dissipation ribs, heat on the first heat dissipation ribs is taken away, and cooling of the chip is achieved.

Description

Technical Field

[0001] The utility model relates to a centrifugal fan, in particular to a rear cover for heat dissipation of a centrifugal fan. Background Art

[0002] A rear cover needs to be installed at the end of a centrifugal fan, and components such as circuit boards and chips are placed inside the rear cover; during the operation of the centrifugal fan, the components generate heat, especially the chip generates a relatively high amount of heat. The conventional solution is to set heat dissipation ribs on the rear cover with an end face and an annular side wall to achieve heat dissipation, but the heat dissipation effect is not ideal, and the overheating of the chip will cause damage.

[0003] In summary, how to achieve heat dissipation of the chip inside the rear cover has become an urgent problem for researchers in this field. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: how to achieve heat dissipation of the chip inside the rear cover;

[0005] To solve the above technical problem, the technical solution adopted by the utility model is:

[0006] The utility model is a rear cover for heat dissipation of a centrifugal fan, including: a cover body, a recess is opened downward at its end face; the chip installed in the cover body is located at the bottom of the recess; a plurality of equally spaced first heat dissipation ribs are arranged at the recess; the ends of the plurality of first heat dissipation ribs extend parallel and outward to the outside of the cover body and are connected to an annular side part; an air inlet is formed between the bottom of the annular side part and the bottom of the cover body;

[0007] In this solution, the cover body above the chip is recessed downward to form a recess. In this way, near the top surface of the chip in the recess, the heat dissipation area for the chip is increased, and the heat of the chip is easily transferred to the side wall of the recess to achieve heat dissipation; in addition, the cooperation of the first heat dissipation ribs and the recess accelerates heat dissipation, and a heat dissipation air duct is formed between the first heat dissipation ribs; the fan blade with the application number: 202311243613.3 is adopted. When the fan blade rotates, it will enter from the air inlet and be discharged through the gap between the first heat dissipation ribs, taking away the heat on the first heat dissipation ribs to achieve cooling of the chip.

[0008] In order to achieve the cooling and heat dissipation of other components, the utility model adopts a plurality of equally spaced second heat dissipation ribs arranged on the cover body on one side of the chip, and the plurality of second heat dissipation ribs extend towards the annular side part and form the air inlet;

[0009] In this solution, the air generated by the fan blade enters through the air inlet and is discharged through the gap between the second heat dissipation ribs, taking away the heat on the second heat dissipation ribs to achieve cooling of other components.

[0010] In order to be able to laterally introduce the wind from the air inlet into the gap between the two first heat dissipation ribs or the two second heat dissipation ribs, the present utility model adopts an arc-shaped air guiding portion at the top of the annular side portion;

[0011] The wind enters vertically from the air inlet, and after contacting the arc-shaped air guiding portion, it moves laterally in the gap between the two first heat dissipation ribs or the two second heat dissipation ribs, increasing the contact area between the wind and the corresponding heat dissipation ribs, and then taking away the heat of the corresponding heat dissipation ribs.

[0012] In order to further accelerate the cooling of the housing, the present utility model adopts that inclined third heat dissipation ribs are symmetrically arranged on both sides of the end face of the housing, and a plurality of fourth heat dissipation ribs are arranged on the side wall of the housing; the plurality of fourth heat dissipation ribs are arranged at equal intervals and the height gradually increases;

[0013] Corresponding heat dissipation ribs are arranged on the end face of the housing and the side wall of the housing to dissipate heat from the components inside the housing.

[0014] In this solution, the heat dissipation cover is integrally die-cast, so the air duct structure between the heat dissipation ribs is also integrally arranged. In this way, the heat dissipation area, the heat dissipation quantity, and the heat dissipation efficiency are larger and faster; the integrally arranged heat dissipation air cover is also convenient for demolding.

[0015] The beneficial effects of the present utility model: The present utility model is a centrifugal fan heat dissipation cover. The cover located above the chip is recessed downward to form a recessed portion. In this way, near the top surface of the chip in the recessed portion, the heat dissipation area of the chip is increased, and the heat of the chip is easily transferred to the side wall of the recessed portion to achieve heat dissipation; in addition, the cooperation between the first heat dissipation rib and the recessed portion accelerates the heat dissipation. A heat dissipation air duct is formed between the first heat dissipation ribs; when the fan blade rotates, it enters from the air inlet and is discharged through the gap between the first heat dissipation ribs, taking away the heat on the first heat dissipation ribs to achieve the cooling of the chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0017] Figure 1 is the top view of the present utility model;

[0018] Figure 2 is Figure 1 the sectional view taken along the A-A direction of

[0019] Figure 3 is Figure 1 the sectional view taken along the B-B direction of

[0020] Figure 4 is the structural schematic diagram of the present utility model;

[0021] Figure 5 is the structural schematic diagram of the air inlet;

[0022] In the figure: 1 - cover body, 2 - recessed part, 3 - first heat dissipation rib, 4 - annular side part, 5 - air inlet, 6 - second heat dissipation rib, 7 - arc-shaped air guiding part, 8 - third heat dissipation rib, 9 - fourth heat dissipation rib. Specific implementation mode

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0024] As Figures 1-5 shown, the present utility model is a centrifugal fan heat dissipation rear cover, including: a cover body 1, with a recessed part 2 opened downward at its end face; a chip installed in the cover body 1 is located at the bottom of the recessed part 2; multiple equally spaced first heat dissipation ribs 3 are arranged at the recessed part 2; the ends of the multiple first heat dissipation ribs 3 extend parallel and outward to the outside of the cover body 1 and are connected with an annular side part 4; an air inlet 5 is formed between the bottom of the annular side part 4 and the bottom of the cover body 1;

[0025] In this solution, the cover body is recessed downward to form a recessed part. In this way, near the top surface of the chip, the heat dissipation area for the chip is increased, and the heat of the chip is easily transferred to the side wall of the recessed part to achieve heat dissipation; in addition, the connection between the heat dissipation ribs and the recessed part accelerates heat dissipation; a fan blade with the application number: 202311243613.3 is adopted. When the fan blade rotates, it will enter from the air inlet and be discharged through the gap between the first heat dissipation ribs, taking away the heat on the first heat dissipation ribs to achieve cooling of the chip.

[0026] In order to cool and dissipate heat of other components, the present utility model adopts multiple equally spaced second heat dissipation ribs 6 arranged on the cover body 1 on one side of the chip. The multiple second heat dissipation ribs 6 extend towards the annular side part 4 and form the air inlet 5;

[0027] In this solution, the air generated by the fan blade enters through the air inlet and is discharged after passing through the gap between the second heat dissipation ribs, taking away the heat on the second heat dissipation ribs to achieve cooling of other components.

[0028] As Figures 2-3 shown, in order to be able to horizontally introduce the air from the air inlet 5 into the gap between two first heat dissipation ribs or two second heat dissipation ribs, the present utility model adopts that the top of the annular side part 5 has an arc-shaped air guiding part 7;

[0029] The air enters vertically from the air inlet, contacts the arc-shaped air guiding part, and then moves horizontally in the gap between two first heat dissipation ribs or two second heat dissipation ribs, increasing the contact area between the air and the corresponding heat dissipation ribs, and further taking away the heat of the corresponding heat dissipation ribs.

[0030] As Figure 4 shown, in order to further accelerate the cooling of the cover body, the present utility model is characterized in that third heat dissipation ribs 8 are symmetrically arranged obliquely on both sides of the end face of the cover body 1, and a plurality of fourth heat dissipation ribs 9 are arranged on the side wall of the cover body 1; the plurality of fourth heat dissipation ribs 9 are arranged at equal intervals and increase in height gradually;

[0031] Heat dissipation ribs are arranged on the end face and the side wall of the cover body to dissipate heat from the components inside the cover body.

[0032] In this solution, the heat dissipation cover is integrally die-cast. Therefore, the air duct structure between the heat dissipation ribs is also integrally arranged. In this way, the heat dissipation area, the heat dissipation quantity, and the heat dissipation efficiency are larger and faster; the integrally arranged heat dissipation cover is also convenient for demolding.

[0033] Taking the above ideal embodiment based on the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rear cover for heat dissipation of a centrifugal fan, characterized in that, Including: A cover body, with a recessed portion opened downward at its end face; a chip installed in the cover body is located at the bottom of the recessed portion; A plurality of equally spaced first heat dissipation ribs are provided at the recessed portion; The ends of the plurality of first heat dissipation ribs extend parallel and outward to the outside of the cover body and are connected to an annular side portion; An air inlet is formed between the bottom of the annular side portion and the bottom of the cover body.

2. The heat dissipation rear cover of a centrifugal fan according to claim 1, wherein A plurality of equally spaced second heat dissipation ribs are provided on the cover body on one side of the chip, and the plurality of second heat dissipation ribs extend toward the annular side portion and form the air inlet.

3. The centrifugal fan heat dissipation rear cover according to claim 2, wherein The top of the annular side portion has an arc-shaped air guiding portion.

4. The rear cover for heat dissipation of a centrifugal fan according to claim 3, characterized in that, Oblique third heat dissipation ribs are symmetrically provided on both sides of the end face of the cover body.

5. The rear cover for heat dissipation of a centrifugal fan according to claim 4, characterized in that, A plurality of fourth heat dissipation ribs are provided on the side wall of the cover body; The plurality of fourth heat dissipation ribs are equally spaced and increase in height gradually.

6. The heat dissipation rear cover of a centrifugal fan according to claim 1, wherein, The heat dissipation cover is integrally die-cast.

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