TWI758601B - Fan noise-lowering structure - Google Patents

Abstract

A fan noise-lowering structure includes a fan frame main body and a connection section. The fan frame main body has a bottom side and a frame peripheral wall. The frame peripheral wall is perpendicularly annularly disposed on the outer rim of the bottom side. The inner rim of the frame peripheral wall defines an airflow passage. Two ends of the airflow passage respectively have an inlet and an outlet. The connection section is disposed in the frame peripheral wall. Two ends of the connection section are connected with the frame peripheral wall. The two ends of the middle passage are an inlet end and an outlet end in communication with the airflow passage. The connection section serves to guide the high-pressure air of the outlet to jet toward the inlet so as to achieve multiple noise-lowering effects.

Description

Fan noise reduction structure

A fan noise reduction structure, especially a structure that guides the high pressure jets generated by the fan outlet The fan noise reduction structure that leads to the entrance to achieve multiple noise reduction.

Fan noise has always been one of the many problems that have been improved in the fan field. Whether it is to control the rotational speed through a circuit, or to change the fan structure to improve the fan noise are the technical means to solve the problem in the current prior art. One only sets the jet flow on the wall of the moving blade or the frame of the stationary blade to suppress the vortex, but needs to add an external jet source, which cannot be implemented in a limited space, and also easily increases the cost of setting up an additional jet source.

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

Therefore, in order to solve the above-mentioned shortcomings of the prior art, the main purpose of the present invention is to provide a fan noise reduction structure that solves the fan noise by disposing the self-jet noise reduction structure on the fan frame body.

In order to achieve the above-mentioned purpose, the present invention provides a noise reduction structure for a fan, which includes: a fan frame body and a connecting part; the fan frame body has a bottom side and a frame side wall, and the frame side wall is vertically arranged around the The outer periphery of the bottom side and the inner edge of the side wall of the frame define an airflow channel, and two ends of the airflow channel respectively have an inlet and an outlet.

The connecting portion is arranged in the side wall of the frame, and 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.

In order to achieve the above purpose, the present invention provides a noise reduction structure for a fan, comprising: 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 periphery of the first bottom side, and the inner edge of the first frame side wall defines a first airflow channel, and the two ends of the first airflow channel are respectively provided with a first inlet and a first outlet; the second fan frame body has a second bottom side and a second frame side wall, the second frame side wall is vertically arranged around 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 respectively have a second inlet and a second outlet. The first and second frame bodies can be arranged vertically or horizontally. The connecting part has a middle channel, the middle channel has an inlet end and an outlet end, and the inlet end communicates with the second outlet of the side wall of the second frame, and the outlet end communicates with the second outlet of the side wall of the first frame. an entrance.

The present invention provides a self-body jet structure, which guides the airflow with strong pressure at the outlet of the fan to the inlet and outlet to reduce the noise of the jet flow, thereby reducing the noise of the overall fan.

1: Fan noise reduction structure

11: Fan frame body

111: Bottom side

112: Frame side wall

113: Airflow channel

1131: Entrance

1132: Exit

114: Axle barrel

12: Connection part

121: Middle channel

122: entry port

123: Exit port

2: Fan noise reduction structure

21: The first fan frame body

211: First Bottom Side

2111: The first shaft barrel

212: First frame side wall

213: first airflow channel

2131: First Entrance

2132: The first exit

22: Second fan frame body

221: Second bottom side

2211: Second shaft barrel

222: Second frame side wall

223: Second airflow channel

2231: Second entrance

2232: Second exit

23: Connection part

231: Middle channel

2311: entry port

2312: Exit port

3: Fan noise reduction structure

31: The first fan frame body

311: The first entrance

312: First Exit

32: Second fan frame body

321: Second entrance

322: Second Exit

33: Connection part

331: Middle channel

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

The above-mentioned 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, which is a cross-sectional view of the first embodiment of the fan noise reduction structure of the present invention. As shown in the figure, the fan noise reduction structure 1 includes: a fan frame body 11, a connecting part 12; the 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 , and the inner edge of the frame side wall 112 defines an airflow channel 113 , and the airflow channel 113 Both ends have an inlet 1131 and an outlet 1132 respectively. The outlet 1132 is located at the air channel 113 near the bottom side 111 , and the inlet 1131 is located at one end of the air channel 113 opposite to the outlet 1132 .

The connecting portion 12 is arranged in the side wall 112 of the frame. The connecting portion has an intermediate channel 121. The two ends of the connecting portion are connected to the side wall 112 of the frame. 122 is arranged near the outlet 1132 , and the outlet end 123 is arranged near the inlet 1131 .

The bottom side 111 has a shaft barrel 114 , and the shaft barrel 114 is configured by the vertical extension of the bottom side 111 .

Please refer to FIG. 2, which is a cross-sectional view of the second embodiment of the fan noise reduction structure of 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 around the outer periphery of the first bottom side 211 , and the inner edge of the first frame side wall 212 defines a first airflow channel 213 , and two ends of the first airflow channel 213 respectively have a first inlet 2131 and a first outlet 2132 .

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 around the outer periphery of the second bottom side 221, and the second frame side wall 222 The inner edge defines a second airflow channel 223, and both 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 vertically or horizontally. Arranged in any of the ways in parallel, the present embodiment is not limited to the description of the vertical series-connected fans, and the first outlet 2132 is connected to the second inlet 2231 .

The connecting portion 23 has a middle channel 231, the middle 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, and the outlet end 2312 communicates with the second outlet end 2312. At the first entrance 2131 of the side wall 212 of the first frame.

Through the middle passage 231 in the connecting portion 23, the airflow with higher pressure from the second outlet 2232 of the second fan frame body 22 is sprayed to the first inlet 2131 of the first fan frame body 21, thereby reducing the noiser.

The first bottom side 211 has a first shaft barrel 2111, the first shaft barrel 2111 is formed by the vertical extension of the first bottom side 211, and the second bottom side 221 has a second shaft barrel 2211, The second shaft barrel 2211 is configured by the vertical extension of the second bottom side 221 .

The first outlet 2132 is provided at the first airflow channel 213 near the first bottom side 211 , the first inlet 2131 is located at an 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 at the second air passage 223 near the second bottom side 221 , and the second inlet 2231 is disposed at an end of the second air passage 223 opposite to the second outlet 2232 .

Please refer to FIG. 3 , which is a cross-sectional view of the third embodiment of the fan noise reduction structure of 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; the partial structure of this embodiment is the same as that of the second embodiment, so it will not be repeated here, but the difference between this embodiment and the second embodiment is that the first embodiment of this embodiment is different from the second embodiment. 2. The two fan frame bodies 31 and 32 are arranged horizontally in parallel, and a parallel fan is arranged between them. The first fan frame body 31 has a first inlet 311 and a first outlet 312, the second fan frame The fan frame body 32 has a second inlet 321 and a second outlet 322 . The first and second inlets 311 and 321 are arranged in parallel and guide the second fan frame body 32 through the middle channel 331 in the connecting portion 33 . The second outlet 322 has a relatively high-pressure airflow to the first inlet 311 of the first fan frame body 31 for jet flow, thereby reducing noise.

The present invention mainly sprays the air at the low pressure place (the entrance) through the airflow at the high pressure place (the exit) of the air body, thereby reducing the noise problem of the fan.

The connecting portion can be disposed in the wall thickness of the fan frame itself or through an external hanging, which is not limited.

1: Fan noise reduction structure

11: Fan frame body

111: Bottom side

112: Frame side wall

113: Airflow channel

1131: Entrance

1132: Exit

114: Axle barrel

12: Connection part

121: Middle channel

122: entry port

123: Exit port

Claims (3)

A fan noise reduction structure, comprising: a fan frame body with a bottom side and a frame side wall, the frame side wall is vertically arranged around the outer periphery of the bottom side, and the inner edge of the frame side wall defines an airflow channel, and the frame side wall is The two ends of the airflow channel are respectively provided with an inlet and an outlet; a connection part is arranged in the side wall of the frame, the connection part has a middle channel, and the two ends of the middle channel are connected to the side wall of the frame and have an inlet end and an outlet end. The air flow channel is communicated, and the high pressure gas at the outlet can be guided to jet flow to the inlet through the connecting portion, thereby achieving multiple noise reduction effects. The fan noise reduction structure according to claim 1, wherein the bottom side has a shaft tube, and the shaft tube is configured by vertically extending from the bottom side. The fan noise reduction structure as described in claim 1, wherein the outlet is located near the bottom side of the airflow channel, and the inlet is located at the other end of the airflow channel opposite to the outlet, and the inlet end is close to the airflow channel. outlet, the outlet end is close to the inlet.

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