TWM617545U - Fan frame structure of centrifugal fan - Google Patents

Abstract

This invention creates a centrifugal fan frame structure, which includes a bottom plate and a plurality of side wall portions. The outer periphery of the bottom plate is injection-molded with the plurality of side wall portions. The plurality of side wall portions are discontinuous to each other, and the plurality of side wall portions There is a gap between each other, the outer periphery of the bottom plate in the gap is not covered, and the plurality of sidewalls and the bottom plate jointly define an accommodating space, and the plurality of sidewalls are injection molded on the bottom plate at multiple intervals through the plurality of sidewalls. In order to effectively reduce the injection molding bag inner force and reduce the effect of reducing the deformation of the bottom plate.

Description

Fan frame structure of centrifugal fan

This creation relates to a fan frame structure of a centrifugal fan, especially a centrifugal fan frame structure that can reduce the inner force of the injection molding package and reduce the deformation of the bottom plate.

The centrifugal fan is a commonly used system fan. It is often used in electronic equipment with narrow space or where the air outlet is located on the side. The base of the centrifugal fan is usually made of a single material of plastic or thin metal. When using plastic At times, it is manufactured by plastic injection molding, but the strength of the plastic base is not good, so thin metal plates are used as the base material. Generally, the outer frame of the conventional centrifugal fan is mainly composed of a thin metal base and a plastic side wall. Usually, the plastic side wall is covered on the outer periphery of the metal base by an integral injection molding method, and the injection molded plastic The side wall is arranged in a continuous shape and is combined with the metal base to form the outer frame of the centrifugal fan. However, another problem has been extended. It is easy to produce wrapping force during plastic wrapping. When the outer periphery of the metal base is integrally wrapped by the plastic side wall, the metal base will be squeezed under the action of wrapping force. Deformation causes the entire metal base to be deformed and uneven, which affects the size, level and balance of the designed gap between the blades and the base of the assembled centrifugal fan, and further affects the overall performance of the centrifugal fan (such as blade interference with the base/PQ changes) /The sound changes), so a structural design that can resist the deformation of the injection molding of the centrifugal fan frame is needed. Therefore, how to improve the lack of deformation of the metal base caused by the side wall of the conventional injection-molded centrifugal fan is the most important goal for those familiar with the art.

One purpose of this creation is to provide a centrifugal fan frame structure that reduces the injection molding (injection molding) package inner force and reduces the deformation of the bottom plate. Another purpose of this creation is to provide a fan-frame structure formed by injection molding at multiple intervals through a plurality of sidewalls and combined with the outer edge of a bottom plate, so as to achieve (resist) the centrifugal type that prevents structural deformation of the fan-frame structure during injection molding. Fan frame structure. In order to achieve the above objective, this invention provides a centrifugal fan frame structure, which includes a bottom plate and a plurality of side walls. The outer periphery of the bottom plate is injection-molded with the plurality of side walls, and the plurality of side walls are discontinuous. And make the plurality of sidewalls have a gap between each other, the outer periphery of the bottom plate in the gap is not covered, and the plurality of sidewalls and the bottom plate jointly define an accommodating space, through the creation of this fan frame structure The design makes it possible to effectively reduce the inner force of the injection molding package and the effect of reducing the deformation of the bottom plate, and effectively prevent the structure of the fan frame structure from deforming during the injection molding. The plurality of side wall portions has a plurality of long linear side wall portions and a plurality of arc-shaped side wall portions, the plurality of arc-shaped side wall portions and the plurality of long linear side wall portions jointly form a ring wall, and the plurality of arc-shaped side wall portions are not connected to each other. The bottom plate and the plurality of side walls are made of the same material or different materials. The above-mentioned number side wall part is made of plastic material, and the bottom plate is made of metal material.

The above-mentioned purpose of this creation and its structural and functional characteristics will be described based on the preferred embodiments of the accompanying drawings. This creation provides a centrifugal fan frame structure 1, please refer to Figures 1 and 2, supplemented by Figure 3. The centrifugal fan frame structure 1 includes a bottom plate 11 and a plurality of side walls 12, and the bottom plate 11 is made of metal Material (such as stainless steel, aluminum, iron, titanium or alloy), the bottom plate 11 has a straight edge 111, a long linear edge 110, a barrel 114, an air inlet 113 and an arc edge 112, the arc edge 112 It is formed by extending from one end of the long linear edge 110 along the outer contour of the bottom plate 11 to the other end of the long linear edge 110, the long linear edge 110 and the linear edge 111 are vertically connected, and the shaft cylinder 114 It is arranged at the center (or deviated from the center) of the bottom plate 11 for pivoting a fan wheel 22 with a plurality of blades 23 of the centrifugal fan 2, and the air inlet 113 is opened around the shaft tube 114 , Used to guide an airflow from outside. The plurality of side wall portions 12 are made of plastic or metal material. The plurality of side wall portions 12 have a plurality of long linear side wall portions 121 and a plurality of arc-shaped side wall portions 122, and the plurality of arc-shaped side wall portions 121 and the plurality of long linear side wall portions 121 together form a ring In this embodiment, the plurality of long linear side wall portions 121 and the plurality of arc-shaped side wall portions 122 are made of plastic material, which is integrally injected and molded to cover the long linear edge 110 and the curved edge 112 of the bottom plate 11. In other words, the The plurality of side wall portions 12 are integrated with the long linear edge 110 and the arc-shaped edge 112 of the bottom plate 11 in a multi-section (ie discontinuous arrangement) manner (ie, integrated plastic injection molding) to form the fan frame structure 1 . And the plurality of arc-shaped side wall portions 122 are separated from each other by a gap 13, and the arc-shaped edge 112 of the bottom plate 11 in each gap 13 is not covered by the arc-shaped side wall portion 122, and two adjacent arc-shaped There is also no connection between the side wall portions 12. Therefore, through the gap 13 between the plurality of arc-shaped side wall portions 12, it is provided that the injection-molded plurality of side wall portions 12 have a margin of expansion and contraction, thereby preventing the side wall portion 12 from being squeezed by the material expansion on the bottom plate 11 after injection molding. It also effectively reduces the wrapping force generated by the plastic wrapping and reduces the deformation of the bottom plate 11. In addition, the plurality of side wall portions 12 and the bottom plate 11 jointly define an accommodating space 14 and an air outlet 15. The accommodating space 14 is connected to the air inlet 113 and the air outlet 15, and the shaft 114 and the fan wheel thereon 22 is accommodated in the accommodating space 14, wherein the bottom plate 11 and the plurality of side wall portions 12 can be made of the same material or different materials. In addition, in the actual implementation of this creation, the top side of the plurality of side walls 12 of the fan frame structure 1 of this creation is assembled with an upper plate 21 of the centrifugal fan 2, so the fan of this creation is used through the centrifugal fan 2. The frame structure 1 can maintain the axial distance between the blades 23 of the fan wheel 22 in the centrifugal fan 2 and the bottom plate 11 to be constant, thereby effectively stabilizing the performance of the centrifugal fan 2. Therefore, the design of the fan frame structure 1 is formed by combining the plurality of side wall portions 12 by injection molding at multiple intervals on the outer periphery of the bottom plate 11, so as to effectively reduce the inner force of the side wall portion 12 injection molding and reduce the deformation of the base structure. The effect of this effectively prevents structural deformation of the fan frame structure 1 during injection molding.

1: Fan frame structure 11: bottom plate 110: Long linear edge 111: Straight edge 112: curved edge 113: Air Inlet 114: Axle tube 12: Side wall 121: Long linear side wall 122: curved side wall 13: gap 14: accommodating space 15: Air outlet 2: Centrifugal fan 21: upper board 22: Fan wheel 23: blade

Figure 1 is a three-dimensional partial cross-sectional schematic diagram of an embodiment of the creation. Figure 2 is a schematic top view of Figure 1 of the creation. Figure 3 is an exploded perspective view of a centrifugal fan according to an embodiment of the creation.

1: Fan frame structure

11: bottom plate

110: Long linear edge

111: Straight edge

112: curved edge

113: Air Inlet

114: Axle tube

12: Side wall

121: Long linear side wall

122: curved side wall

13: gap

14: accommodating space

15: Air outlet

Claims (4)

A centrifugal fan frame structure includes a bottom plate and a plurality of side wall portions. The outer periphery of the bottom plate is injection-molded with the plurality of side wall portions. The plurality of side wall portions are discontinuous, and the plurality of side wall portions have A gap, the outer periphery of the bottom plate in the gap is not covered, and the plurality of sidewalls and the bottom plate jointly define an accommodating space. The centrifugal fan frame structure described in the first item of the scope of patent application, wherein the plurality of side wall portions has a plurality of long linear side wall portions and a plurality of arc-shaped side wall portions, and the plurality of long linear side wall portions and the plurality of arc-shaped side wall portions jointly form A ring wall, and the plurality of arc-shaped side walls are not connected to each other. In the centrifugal fan frame structure described in item 1 of the scope of patent application, the bottom plate and the plurality of side walls are made of the same material or different materials. For the centrifugal fan frame structure described in item 1 of the scope of patent application, the plurality of side walls are made of plastic material, and the bottom plate is made of metal material.

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