CN111963480A - Frame structure of centrifugal fan - Google Patents

Abstract

The invention provides a frame structure of a centrifugal fan, comprising: a lower shell and a cover body; the lower shell is provided with a bottom and an outer wall part, the outer wall part is vertically and circularly arranged on the periphery of the bottom, and the outer wall part is provided with an air outlet; the cover body is provided with an upper side, a lower side and an air inlet, the air inlet penetrates through the upper side and the lower side of the cover body, the cover body and the lower shell are correspondingly covered to form a space, the air outlet is communicated with the air inlet through the space, a first distance height is arranged between the lower shell and the cover body in the space, a second distance height is arranged between the lower shell and the cover body and positioned at the air outlet, the second distance height is larger than the first distance height, the air outlet is prevented from being blocked by a radiating element (module) matched with the air outlet by increasing the height of the air outlet, and therefore flow field efficiency can be improved and noise can be reduced.

Description

Centrifugal fan frame structure

technical field

The present invention relates to a centrifugal fan frame body structure, in particular to a centrifugal fan frame body structure which can improve the fan noise and at the same time enhance the structural strength of the fan casing.

Background technique

The internal space of traditional notebook computers is narrow, and the heat source is located in the center, which is easy to accumulate heat. Therefore, the general industry guides the heat to the side air outlets by setting up heat pipes, and then the fan takes the heat guided by the heat pipes away from the internal space to achieve a cooling effect. Purpose.

In the application of the existing notebook computer cooling fan module, the distance between the heat pipe and the C/D parts of the notebook computer case is only 0.8 ~ 0.9mm. Due to the heat radiation to the C/D parts, the surface temperature of the notebook computer is too high, resulting in poor consumer experience. The best problem, the original fan structure design, the height of the upper cover (or bottom plate) of the fan casing is almost the same as the heat pipe, which is of limited help in reducing the surface temperature of the notebook computer, and because the height of the airflow boundary is completely the same as that of the heat pipe, there will be a There is resistance, which causes noise problems (usually the fan is located on the left and right sides, close to the operating area of the hands and legs), so the user easily feels that the surface temperature of the notebook is too high, and the high heat generated by the air outlet is also At the same time, heat is generated at the bottom of the notebook computer, causing discomfort when the user touches it, and because the heat dissipation (heat conduction) components or modules such as heat pipes and heat dissipation fins are directly connected or assembled at the air outlet of the fan, in addition to causing the fan In addition to the efficiency of the air outlet or flow field, it is more likely to generate noise and poor heat dissipation effect. Therefore, how to improve the above-mentioned existing deficiencies is the primary goal of this case.

SUMMARY OF THE INVENTION

Therefore, in order to effectively solve the above-mentioned problems, the main purpose of the present invention is to provide a method for increasing the height of the air outlet of the fan casing, thereby increasing the smoothness of the fan's airflow and preventing the airflow at the air outlet from hitting the heat conduction element. generated noise.

In order to achieve the above-mentioned purpose, the present invention provides a centrifugal fan frame structure, characterized in that it includes:

A lower casing has a bottom and an outer wall, the outer wall is vertically arranged around the periphery of the bottom, and an air outlet is defined on the outer wall;

A cover body has an upper side, a lower side and an air inlet, the air inlet penetrates the upper and lower sides of the cover body, the cover body and the lower casing are correspondingly covered to form a space, and the air outlet passes through the cover body. The space is communicated with the air inlet, and there is a first distance height between the lower case and the cover in the space, and a space between the lower case and the cover is located at the air outlet The second distance height is greater than the first distance height.

The frame structure of the centrifugal fan, wherein: the lower casing is provided with a shaft tube, and the shaft tube is sleeved with a stator outside, a bearing is accommodated inside, and a rotor set has a shaft center and a fan blade a hub, the shaft center is vertically connected with the fan blade hub, and the rotor is pivoted with the bearing through the shaft center, and a plurality of blades extend outside the fan blade hub.

The centrifugal fan frame structure, wherein: the reinforcing rib on the cover is a structure formed by punching, and the reinforcing rib is formed by protruding from the lower side of the cover to the upper side, and enlarges the The height of the air outlet forms the aforementioned second distance height.

The centrifugal fan frame structure, wherein: the reinforcing rib of the lower casing is a structure formed by punching, and the reinforcing rib is formed by protruding from the bottom of the lower casing to the other side, and expands The above-mentioned second distance height is formed according to the height of the air outlet.

The frame structure of the centrifugal fan further includes at least one reinforcing rib, the reinforcing rib is arranged on the lower casing and/or the cover, and the reinforcing rib extends horizontally to the air outlet.

The frame structure of the centrifugal fan, wherein: there is also a heat dissipation module, the heat dissipation module has at least one heat pipe, a fin group and a base, the base is correspondingly in contact with a heat source to conduct heat, the One end of the heat pipe is joined with the base, and the other end is joined with the fin set, the heat pipe is arranged at the aforementioned air outlet corresponding to the fin set, and the overlapping height of the heat pipe and the fin set is lower than the The second distance height at the air outlet.

The frame structure of the centrifugal fan, wherein: the air outlet is formed by nonlinear expansion or linear gradual expansion from the first distance height to the second distance height.

By increasing the height of the air outlet, the present invention can effectively prevent the air outlet from being blocked by other elements (heat-dissipating elements or heat-conducting elements), thereby reducing the cooling efficiency or incapacitation of the air outlet and the loss of noise at the outlet.

Description of drawings

1 is an exploded perspective view of the first embodiment of the centrifugal fan frame structure of the present invention;

2 is a sectional view of the first embodiment of the centrifugal fan frame structure of the present invention;

3a is an exploded perspective view of the second embodiment of the centrifugal fan frame structure of the present invention;

Figure 3b is a perspective combined view of the second embodiment of the centrifugal fan frame structure of the present invention;

4a is an exploded perspective view of the second embodiment of the centrifugal fan frame structure of the present invention;

Figure 4b is a perspective combined view of the second embodiment of the centrifugal fan frame structure of the present invention;

5 is a schematic diagram of the third embodiment of the centrifugal fan frame structure of the present invention;

6 is a schematic diagram of the third embodiment of the centrifugal fan frame structure of the present invention;

7 is a schematic diagram of the third embodiment of the centrifugal fan frame structure of the present invention.

Description of reference numerals: lower casing 11; bottom 111; outer wall part 112; air outlet 113; shaft barrel 114; stator 115; bearing 116; shaft 1161; fan blade hub 1162; blade 1163; ; lower side 122; air inlet 123; strengthening rib 13; space 14; cooling module 2; heat pipe 21; fin group 22; base 23; The second distance height H; the first distance height h.

Detailed ways

The above objects of the present invention and their structural and functional characteristics will be described with reference to the preferred embodiments of the accompanying drawings.

Please refer to FIG. 1 and FIG. 2 , which are three-dimensional exploded and sectional views of the first embodiment of the centrifugal fan frame structure of the present invention, including: a lower casing 11 and a cover 12 ;

The lower casing 11 has a bottom portion 111 and an outer wall portion 112 , the outer wall portion 112 is vertically arranged around the periphery of the bottom portion 111 , and an air outlet 113 is defined in the outer wall portion 112 .

The cover body 12 has an upper side 121 and a lower side 122 and an air inlet 123. The air inlet 123 penetrates the upper and lower sides 121 and 122 of the cover body. A space 14, the air outlet 113 communicates with the air inlet 123 through the space 14, and there is a first distance height h between the lower casing 11 and the cover 12 in the space 14, the lower There is a second distance height H between the casing 11 and the cover 12 located at the air outlet 113 , the second distance height H is greater than the first distance height h, and the air outlet 113 is formed by the first distance The height h to the second distance height H can be formed by one of nonlinear abrupt expansion or linear gradual expansion.

The main improvement of the existing defect in this case is: when the air outlet of the centrifugal fan is assembled with the heat dissipation element (heat dissipation fin) or the heat conduction element (heat pipe), the air outlet of the existing centrifugal fan happens to be blocked by the heat pipe and the heat dissipation fin. , in addition to affecting the air outlet efficiency of the centrifugal fan, it will also generate noise at the air outlet. By increasing the second distance height H at the air outlet 113, the second distance height H is slightly higher than the heat dissipation element (heat dissipation). The height of the fins) or heat-conducting elements (heat pipes) or the height after the two are stacked on each other, without being blocked by the heat-dissipating elements (heat-dissipating fins) or heat-conducting elements (heat pipes), not only increases the forced centrifugal fan outlet 113 The efficiency of the wind can also prevent the air outlet 113 from being blocked by a heat dissipation element (heat dissipation fin) or a heat conduction element (heat pipe) to generate noise.

Please refer to FIGS. 3a, 3b, 4a, and 4b, which are three-dimensional exploded and combined views of the second embodiment of the centrifugal fan frame structure of the present invention. As shown in the figures, part of the structure of this embodiment is the same as the first embodiment described above. The example is the same and will not be repeated here, but the difference between this embodiment and the aforementioned first embodiment is that this embodiment can further have at least one reinforcing rib 13 , and the reinforcing rib 13 is selected to be disposed on the lower casing 11 Either or both of the cover body 12 are provided, and the reinforcing ribs 13 mainly pass through the bottom 111 of the lower case 11 (as shown in FIG. 4a and FIG. 4b ) or the lower side 122 of the cover body 12 (as shown in FIG. 3a ). 3b) The rib structure is formed by punching convex or concave, and the reinforcing rib 13 is a structure formed by stamping, and the reinforcing rib 13 is formed by protruding from the lower side 122 of the cover body 12 to the upper side 121 , or the reinforcing rib can be formed by punching on the lower casing, formed by protruding from the bottom of the lower casing to the other side, and the reinforcing rib 13 can further lift the lower casing 11 and the cover 12 structural strength.

In this embodiment, the reinforcing rib 13 disposed near the air outlet 113 is further extended to the air outlet 113, so that the height of the air outlet 113 is enlarged, and at the same time, the height of the air outlet 113 is enlarged to form the aforementioned second distance height H, so that the second distance height H is greater than the first distance height h.

Please refer to FIG. 5 , FIG. 6 , and FIG. 7 , which are schematic diagrams of the third embodiment of the centrifugal fan frame structure of the present invention. As shown in the drawings, part of the structure of this embodiment is the same as that of the first embodiment, so it will not be discussed here. To repeat, the difference between this embodiment and the first embodiment is that the lower casing 11 is further provided with a shaft barrel 114, and the shaft barrel 114 is sleeved with a stator 115 outside, and a bearing is housed inside. 116.

A rotor assembly 116 has a shaft center 1161 and a fan blade hub 1162, the shaft center 1161 is vertically connected with the fan blade hub 1162, and the rotor assembly is pivoted to the bearing 116 through the shaft center 1161, and the fan blade hub 1162 A plurality of vanes 1163 extend externally.

In addition, this embodiment further includes a heat dissipation module 2. The heat dissipation module 2 has at least one heat pipe 21, a fin group 22 and a base 23. The base 23 is in contact with a heat source 3 to conduct heat. One end of the heat pipe 21 is joined to the base 23 , and the other end is joined to the fin group 22 , and is disposed at the aforementioned air outlet 113 corresponding to the fin group 22 , and the heat pipe 21 is lower than the first air outlet 113 . Two distance height H.

3a, 3b, 4a, and 4b together, the reinforcing ribs 13 are mainly used to enhance the structural strength of the lower case 11 or the upper cover 12, and are connected with the case C and D of the notebook computer. The parts 4 and 5 touch the top. This embodiment further discloses that the present invention mainly combines the reinforcing ribs 13 on the lower casing 11 or the cover body 12 of the fan, which are used to enhance the structural strength of the fan, and the air outlet 113. The rib portion 13 increases the height of the air outlet 113, thereby improving the reduction of heat transfer efficiency and the noise at the air outlet caused by the air outlet 113 being blocked by a heat dissipation element or a heat conducting element.

In addition, the reinforcing rib 13 of the present invention further increases the space between the casings C and D of the notebook computer 4 and 5, so that the airflow guided by the fan outlet 113 can pass through the casings C and D of the notebook computer 4 and 5. It flows between the cooling element (fin set) or the heat conducting element (heat pipe) to increase the cooling airflow of the notebook computer's case and avoid heat accumulation in specific areas.

Claims (7)

1. a centrifugal fan frame structure, is characterized in that, comprises: A lower casing has a bottom and an outer wall, the outer wall is vertically arranged around the periphery of the bottom, and an air outlet is defined on the outer wall; A cover body has an upper side, a lower side and an air inlet, the air inlet penetrates the upper and lower sides of the cover body, the cover body and the lower casing are correspondingly covered to form a space, and the air outlet passes through the cover body. The space is communicated with the air inlet, and there is a first distance height between the lower case and the cover in the space, and a space between the lower case and the cover is located at the air outlet The second distance height is greater than the first distance height. 2 . The centrifugal fan frame structure according to claim 1 , wherein the lower casing is provided with a shaft tube, and the shaft tube is sleeved with a stator, and a bearing and a rotor set are arranged inside. 3 . It has a shaft center and a fan blade hub, the shaft center is vertically connected with the fan blade hub, and the rotor is pivoted with the bearing through the shaft center, and a plurality of blades extend outside the fan blade hub. 3 . The centrifugal fan frame structure of claim 1 , wherein the reinforcing rib on the cover is a structure formed by punching, and the reinforcing rib protrudes upward from the lower side of the cover. 4 . The extension is formed, and the height of the air outlet is enlarged to form the aforementioned second distance height. 4 . The centrifugal fan frame structure of claim 1 , wherein the reinforcing rib of the lower casing is formed by punching, and the reinforcing rib extends from the bottom of the lower casing to the other side. 5 . The side protrusion is formed, and the height of the air outlet is enlarged to form the aforementioned second distance height. 5 . The centrifugal fan frame structure according to claim 1 , further comprising at least one reinforcing rib, the reinforcing rib is disposed on the lower casing and/or the cover, and the reinforcing rib is horizontal. 6 . extend to the outlet. 6 . The centrifugal fan frame structure according to claim 1 , further comprising a heat dissipation module, the heat dissipation module has at least one heat pipe, a set of fins, and a base, and the base corresponds to a The heat source contacts and conducts heat, one end of the heat pipe is joined with the base, and the other end is joined with the fin group, the heat pipe is arranged at the aforementioned air outlet corresponding to the fin group, and the heat pipe is connected with the fin group. The overlapping height is lower than the second distance height at the air outlet. 7 . The centrifugal fan frame structure of claim 1 , wherein the air outlet is formed by non-linear expansion or linear expansion from the first distance height to the second distance height. 8 .

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