TWI671470B - Fan noise reduction structure - Google Patents

Abstract

A fan noise reduction structure includes: a fan frame body and a connecting portion; the fan frame The frame body has a bottom side and a frame side wall, the frame side wall is vertically arranged on the outer peripheral edge of the bottom side, and the inner edge of the frame side wall defines an air flow channel, and the air flow channel has an inlet and an outlet at both ends of the frame; The connecting portion is provided in the side wall of the frame, and the two ends of the connecting portion are connected to the side wall of the frame with an inlet end and an outlet end and communicate with the airflow channel; through the connecting portion, high-pressure gas from the outlet can be guided to the inlet. Jet flow is performed to achieve multiple noise reduction effects.

Description

Fan noise reduction structure

Fan noise reduction structure, especially high-pressure jet flow generated by fan guide through structure Fan noise reduction structure leading to the entrance to achieve multiple noise reduction.

Fan noise has always been one of the many problems in the field of fans. Whether it is to control the speed through the circuit, or to change the structure of the fan to improve the fan noise are current technical solutions to the problem. Among them, US patent US6244817 discloses One type only provides a jet flow on the moving blade or stationary blade frame wall to suppress the vortex, but an external jet source needs to be added, which can not be performed in a limited space, and it is easy to increase the cost of additional jet source settings.

Therefore, how to reduce fan noise without additional equipment is the goal of those skilled in the art.

Therefore, in order to solve the shortcomings of the above-mentioned conventional technology, the main object of the present invention is to provide a fan noise reduction structure that solves the fan noise by providing a self-jetting noise reduction structure on the fan frame body.

To achieve the above object, the present invention provides a fan noise reduction structure, comprising: a fan frame body and a connecting portion; the fan frame body has a bottom side and a frame side wall, and the frame side wall is vertically ring An airflow channel is defined on the outer periphery of the bottom side and the inner edge of the side wall of the frame, and the airflow channel has an inlet and an outlet at both ends of the airflow channel, respectively.

The connecting portion is disposed in a side wall of the frame, and the two ends of the connecting portion are connected to the side wall of the frame and have an inlet end and an outlet end and communicate with the airflow channel.

To achieve the above object, the present invention provides a fan noise reduction structure, which includes: a first fan frame body, a second fan frame body, and a connecting portion; the first fan frame body has a first bottom side And a first frame side wall, the first frame side wall is vertically arranged on the outer peripheral edge of the first bottom side, and an inner edge of the first frame side wall defines a first air flow channel, and the two ends of the first air flow channel have A first inlet and a first outlet; the second fan frame body has a second bottom side and a second frame side wall, and the second frame side wall is vertically arranged on the outer periphery of the second bottom side, and the The inner edge of the side wall of the second frame defines a second airflow channel, and the two ends of the second airflow channel have a second inlet and a second outlet, respectively, and the first and second frame bodies are selected to be vertical or horizontal side by side. The connecting portion has an intermediate channel having an inlet end and an outlet end, and the inlet end is connected to a second outlet of the second frame side wall, and the outlet end is connected to a first outlet of the first frame side wall. At the entrance.

Through the present invention, an auto-jetting structure is provided, which guides a strong pressure airflow at the fan outlet to the inlet and outlet to perform noise reduction, thereby reducing the noise of the overall fan.

1‧‧‧fan noise reduction structure

11‧‧‧fan frame body

111‧‧‧ bottom side

112‧‧‧Frame sidewall

113‧‧‧airflow channel

1131‧‧‧ entrance

1132‧‧‧Export

114‧‧‧ shaft cylinder

12‧‧‧ Connection Department

121‧‧‧ middle passage

122‧‧‧ Entrance

123‧‧‧Export

2‧‧‧fan noise reduction structure

21‧‧‧The first fan frame body

211‧‧‧first bottom

2111‧‧‧First shaft cylinder

212‧‧‧ side wall of the first frame

213‧‧‧first air flow channel

2131‧‧‧First Entrance

2132‧‧‧First Exit

22‧‧‧Second fan frame body

221‧‧‧ second bottom

2211‧‧‧Second shaft cylinder

222‧‧‧ side wall of the second frame

223‧‧‧second airflow channel

2231‧‧‧Second Entrance

2232‧‧‧Second exit

23‧‧‧Connecting Department

231‧‧‧Intermediate passage

2311‧‧‧Inlet

2312‧‧‧Export

3‧‧‧fan noise reduction structure

31‧‧‧The first fan frame body

311‧‧‧First Entrance

312‧‧‧Exit 1

32‧‧‧Second fan frame body

321‧‧‧Second Entrance

322‧‧‧Second exit

33‧‧‧Connecting Department

331‧‧‧Intermediate passage

Figure 1 is a cross-sectional view of a first embodiment of a fan noise reduction structure of the present invention; Figure 2 is a cross-sectional view of a second embodiment of a fan noise reduction structure of the present invention; and Figure 3 is a third embodiment of a fan noise reduction structure of the present invention Example of a sectional view.

The above-mentioned object of the present invention and its structural and functional characteristics will be described based on the preferred embodiments of the drawings.

Please refer to FIG. 1, which is a cross-sectional view of a first embodiment of a fan noise reduction structure according to the present invention. As shown in the figure, the fan noise reduction structure 1 includes: a fan frame body 11 and a connecting portion 12; The fan frame body 11 has a bottom side 111 and a frame side wall 112. The frame side wall 112 is vertically arranged around the outer periphery of the bottom side 111. The inner edge of the frame side wall 112 defines an airflow channel 113, and the airflow channel 113 The two ends each have an inlet 1131 and an outlet 1132. The outlet 1132 is provided at the airflow channel 113 near the bottom side 111, and the inlet 1131 is provided at one end of the airflow channel 113 opposite to the outlet 1132.

The connecting portion 12 is disposed in the frame side wall 112. The connecting portion has an intermediate channel 121 at both ends. The connecting portion 12 has an inlet end 122 and an outlet end 123 at the frame side wall 112 and communicates with the air flow channel 113. The inlet end 122 is disposed near the exit 1132, and the exit end 123 is disposed near the entrance 1131.

The bottom side 111 has a shaft cylinder 114, and the shaft cylinder 114 is configured by extending vertically from the bottom side 111.

Please refer to FIG. 2, which is a cross-sectional view of a second embodiment of a fan noise reduction structure according to the present invention. As shown in the figure, the fan noise reduction structure 2 includes a first fan frame body 21 and a second fan frame. The main body 22 and a connecting portion 23; the first fan frame body 21 has a first bottom side 211 and a first frame side wall 212, and the first frame side wall 212 is vertically arranged on the outer periphery of the first bottom side 211 A first air flow channel 213 is defined on the inner edge of the first frame side wall 212, and a first inlet 2131 and a first outlet 2132 are respectively formed at both ends of the first air flow channel 213.

The second fan frame body 22 has a second bottom side 221 and a second frame side wall 222. The second frame side wall 222 is vertically arranged on the outer periphery of the second bottom side 221, and the second frame side wall 222 An inner edge defines a second airflow channel 223, and two ends of the second airflow channel 223 have a second inlet 2231 and a second outlet 2232, respectively. The first and second frame bodies 21 and 22 are selected to be connected in series or horizontally. It is set up in any one of the manners in parallel. In this embodiment, the description of setting the vertical tandem fan is not limited. The first outlet 2132 is connected to the second inlet 2231.

The connecting portion 23 has an intermediate channel 231. The intermediate channel 231 has an inlet end 2311 and an outlet end 2312. The inlet end 2311 communicates with the second outlet 2232 of the second frame side wall 222. The outlet end 2312 communicates with the A first entrance 2131 of the first frame sidewall 212.

The high-pressure airflow from the second outlet 2232 of the second fan frame body 22 is guided to the first inlet 2131 of the first fan frame body 21 by the intermediate channel 231 in the connecting portion 23, thereby reducing the flow. Noisy.

The first bottom side 211 has a first shaft cylinder 2111. The first shaft cylinder 2111 is configured by extending vertically from the first bottom side 211. The second bottom side 221 has a second shaft cylinder 2211. The second shaft cylinder 2211 is configured by the second bottom side 221 extending vertically.

The first outlet 2132 is provided near the first bottom side 211 of the first airflow channel 213, and the first inlet 2131 is provided at one end of the first airflow channel 213 opposite to the first outlet 2132, and the inlet end 2311 Close to the second outlet 2232, the outlet end 2312 is close to the first inlet 2131.

The second outlet 2232 is disposed near the second bottom side 221 of the second airflow channel 223, and the second inlet 2231 is disposed at an end of the second airflow channel 223 opposite to the second outlet 2232.

Please refer to FIG. 3, which is a cross-sectional view of a third embodiment of a fan noise reduction structure according to the present invention. As shown in the figure, the fan noise reduction structure 3 includes a first fan frame body 31 and a second fan frame. The main body 32 and a connecting portion 33; part of the structure of this embodiment is the same as that of the aforementioned second embodiment, so it will not be repeated here, but the difference between this embodiment and the aforementioned second embodiment is that the first embodiment of this embodiment The two fan frame bodies 31 and 32 are horizontally arranged side by side, and the two fan frames are arranged in a parallel type. The first fan frame body 31 has a first inlet 311 and a first outlet 312, and the second The fan frame body 32 has a second inlet 321 and a second outlet 322. The first two inlets 311 and 321 are arranged side by side, and guide the second fan frame body 32 through the intermediate channel 331 in the connection portion 33. The second outlet 322 has a high-pressure airflow to spray to the first inlet 311 of the first fan frame body 31 to reduce noise.

The invention mainly sprays the low-pressure place (the entrance) by the airflow at the high-pressure place (the outlet) without the wind, thereby reducing the noise problem of the fan.

The connection portion may be provided in the wall thickness of the fan frame itself or through any external method, and the connection portion is not limited.

Claims (5)

A fan noise reduction structure includes: a first fan frame body having a first bottom side and a first frame side wall, the first frame side wall is vertically ringed on the outer peripheral edge of the first bottom side, and the first An inner edge of a side wall of a frame defines a first airflow channel, and the first airflow channel has a first inlet and a first outlet at both ends; a second fan frame body having a second bottom side and a second frame. A side wall, the second frame side wall is vertically arranged on the outer peripheral edge of the second bottom side, and an inner edge of the second frame side wall defines a second air flow channel, and the second air flow channel has a second inlet and A second outlet, the first and second frame bodies are selected to be arranged vertically or horizontally side by side; a connecting portion has an intermediate channel having an inlet end and an outlet end and the inlet end communicates At the second exit of the second frame side wall, the exit end communicates with the first entrance of the first frame side wall. The fan noise reduction structure according to item 1 of the patent application scope, wherein the first bottom side has a first shaft cylinder, and the first shaft cylinder is configured by the first bottom side extending vertically. The two bottom sides have a second shaft cylinder, and the second shaft cylinder is configured by the second bottom side extending vertically. According to the fan noise reduction structure described in the first item of the patent application scope, wherein the first outlet is provided near the first bottom side of the first air flow channel, and the first inlet is located opposite the first air flow channel. One end of an outlet, the inlet end is close to the second outlet, the outlet end is close to the first inlet, the second outlet is provided at the second air flow channel near the second bottom side, and the second inlet is provided At the other end of the second airflow channel opposite to the second outlet. According to the fan noise reduction structure described in item 1 of the scope of the patent application, wherein the first and second fan frame bodies are vertically docked, and the first outlet is docked with the second inlet. The fan noise reduction structure according to item 1 of the scope of the patent application, wherein the first and second fan frame bodies are arranged horizontally side by side, the first and second inlets are arranged side by side, and the first and second outlets are arranged side by side.