TW201947123A - 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, particularly a fan noise reduction structure that guides high-pressure jets generated at the fan outlet to the entrance through the structure to achieve multiple noise reductions.

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, which includes: a fan frame body and a connection portion;
The fan frame body has a bottom side and a frame side wall. The frame side wall is vertically ringed 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 One exit.
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 connection 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 an outer peripheral edge of the first bottom side, and an inner edge of the first frame side wall defines a first An airflow channel, and each of the two ends of the first airflow channel has 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 on the outer periphery of the second bottom side, and an inner edge of the second frame side wall defines a second An airflow channel, and a second inlet and a second outlet are respectively provided at both ends of the second airflow channel, and the first and second frame bodies are selected to be arranged vertically or horizontally in parallel;
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 the first inlet of the first frame side wall .
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.

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 connection 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 on the outer periphery of the bottom side 111, and the inner edge of the frame side wall 112 defines an air flow channel 113, and the air flow 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. Body 22, a connecting portion 23;
The first fan frame body 21 has a first bottom side 211 and a first frame side wall 212. The first frame side wall 212 is vertically arranged on the outer periphery of the first bottom side 211 and the first frame side wall 212. The inner edge defines a first airflow channel 213, and the first airflow channel 213 has a first inlet 2131 and a first outlet 2132 at both ends, respectively.
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. Body 32, a connecting portion 33;
The structure of this embodiment is the same as that of the second embodiment described above, so it will not be repeated here, but the difference between this embodiment and the second embodiment is that the first and second fan frame bodies 31 and 32 of this embodiment It is horizontally arranged side by side, and between them is a parallel fan arrangement. The first fan frame body 31 has a first inlet 311 and a first outlet 312, and the second fan frame body 32 has a second An inlet 321 and a second outlet 322. The first and second inlets 311 and 321 are arranged side by side, and the second outlet 322 of the second fan frame body 32 is guided through an intermediate passage 331 in the connecting portion 33 to have a higher pressure. The airflow sprays toward the first inlet 311 of the first fan frame body 31, thereby reducing 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 connecting 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.

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

FIG. 1 is a cross-sectional view of a first embodiment of a noise reduction structure of a fan according to the present invention;

Fig. 2 is a sectional view of a second embodiment of a noise reduction structure of a fan according to the present invention;

FIG. 3 is a cross-sectional view of a third embodiment of the fan noise reduction structure of the present invention.

Claims (3)

A fan noise reduction structure includes: A fan 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 an inner edge of the frame side wall defines an air flow channel, and the air flow channel has an inlet and An exit A connecting portion is disposed in the side wall of the frame. The connecting portion has an intermediate channel. The two ends of the intermediate channel are connected to the frame side wall with an inlet end and an outlet end and communicate with the airflow channel. The fan noise reduction structure according to item 1 of the scope of patent application, wherein the bottom side has a shaft cylinder, and the shaft cylinder is configured by the bottom side extending vertically. According to the fan noise reduction structure described in item 1 of the patent application scope, wherein the outlet is provided near the bottom side of the airflow channel, the inlet is provided at the other end of the opposite outlet of the airflow channel, and the inlet end is close to the Exit, the exit end is close to the entrance.