Special silencer for high-frequency fan

Abstract

The utility model discloses a special silencer for a high-frequency fan, and relates to the technical field of fan silencers. The device comprises a fixed shell, a breathable disc and a gas transmission cavity, the gas transmission cavity is fixed to the inner bottom of the fixed shell, the top end of the gas transmission cavity is open, spiral blades are fixed to the upper portion of the inner wall of the gas transmission cavity in an annular array mode, and a plurality of parallel fixing rings are fixed to the portion, above the gas transmission cavity, of the inner wall of the fixed shell. A flexible connecting ring is fixed to the inner ring of each fixing ring, and a breathable disc is fixed to the inner ring of each flexible connecting ring. According to the special silencer for the high-frequency fan, the problems that the noise reduction effect of the special silencer for the high-frequency fan is not good enough and the stability is not good enough when air passes through are solved through the arrangement of the fixed shell, the ventilation disc and the air conveying cavity, and the special silencer for the high-frequency fan has the advantages that the noise reduction effect of the special silencer for the high-frequency fan is better, and the stability of airflow is better when the air passes through.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan silencers, in particular to a special silencer for high-frequency fans. Background Art

[0002] The high-frequency fan special muffler is a muffler used to control the aerodynamic noise generated by the fan to the environment. It is suitable for the muffler of the inlet and outlet ducts of various fans, blowers, centrifugal and axial flow fans. The types of mufflers include straight pipe type, sheet type, folded plate type, honeycomb type, sound flow type, labyrinth type and elbow type, but it still has the following disadvantages in actual use:

[0003] When the high-frequency fan dedicated silencer is working, the air is directly delivered into it through the silencer components with different distributions. When the air passes through, the air drives the silencer structure to vibrate, reducing the energy of the passing air and the noise. However, the vibration on the silencer components is easily transmitted to the outer shell of the silencer, causing the noise to be transmitted to the outside more efficiently, affecting the silencer effect.

[0004] When the high-frequency fan special silencer is working, the corresponding structure is directly installed in the appropriate position. After the air passes through the silencer structure, the airflow changes. During the airflow change process, it is easy to cause the airflow of the exhaust structure to be unstable when exhausting, affecting the stability of the exhaust. Utility Model Content

[0005] The utility model aims to provide a special muffler for high-frequency fans, which solves the problems that the special muffler for high-frequency fans has poor noise reduction effect and poor stability when air passes through by arranging a fixed shell, a breathable disk and an air delivery cavity.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a special silencer for high-frequency fans, comprising a fixed shell, a breathable disk and an air delivery cavity, wherein the inner bottom of the fixed shell is fixed with the air delivery cavity, the top of the air delivery cavity is open, the upper part of the inner wall of the air delivery cavity is fixed with spiral blades in a ring array, a plurality of mutually parallel fixed rings are fixed on the inner wall of the fixed shell above the air delivery cavity, a flexible connecting ring is fixed on the inner ring of each of the fixed rings, a breathable disk is fixed on the inner ring of the flexible connecting ring, when working, the breathable disk is fixed therein through the fixed shell, after air is transported to the fixed shell through the breathable disk, when the air passes through the breathable disk, the breathable disk is driven to vibrate, the noise during air intake is reduced, and the air after the noise reduction through the breathable disk is evenly dispersed through the air delivery cavity and then transported to the exhaust pipe.

[0008] Furthermore, an exhaust pipe is fixedly connected to the center of the bottom end of the fixed shell, and a mounting ring is fixed to the lower part of the peripheral side of the exhaust pipe. When the fixed shell is working, air is transported to the exhaust equipment through the exhaust pipe.

[0009] Furthermore, reinforcing plates are fixed in a circular array at the top and bottom edges of the fixing ring, and each reinforcing plate is fixed to the inner wall of the fixing shell. When the fixing ring is working, the reinforcing plates increase the connection strength with the fixing shell.

[0010] Furthermore, each of the air permeable plates is provided with an air hole vertically therethrough, and the air hole is eccentrically arranged in the air permeable plate, and the air holes on two upper and lower adjacent air permeable plates are staggered with each other. When air passes through the air permeable plate through the air hole, the air drives the air permeable plate to vibrate, thereby reducing the energy of the air passing through and reducing the noise generated when the air is taken in.

[0011] Furthermore, an air intake pipe is fixedly connected to the center of the top of the fixed shell, and the bottom end of the air intake pipe and the center of the air vent on the air permeable plate are staggered with each other, so that air is escorted into the fixed shell through the air intake pipe.

[0012] Furthermore, a reinforcing column is fixed on one side of all the spiral blades close to the central axis of the air delivery cavity, a breathable net is fixed on the inner wall of the air delivery cavity above the spiral blades, the bottom end of the air delivery cavity is closed, and an exhaust port is opened in the center of the bottom end of the air delivery cavity, the exhaust port is connected to the exhaust pipe, the spiral blades are connected together by the reinforcing column, and the air from the air delivery cavity is transported to the exhaust pipe through the exhaust port.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem that the noise reduction effect of the special muffler for high-frequency fans is not good enough by arranging a fixed shell and a breathable disk. Air is transported to the fixed shell through an intake pipe and is then blown onto the breathable disk. In the process of air passing through the breathable disk, the air enters the breathable port on the breathable disk, driving the breathable disk to vibrate. The vibration of the breathable disk is separated from the fixed ring by a flexible connecting ring, thereby reducing the transmission of vibration to the fixed ring and reducing noise. By arranging a plurality of breathable disks, the air entering the fixed shell is fully reduced in noise, and the noise reduction effect is better.

[0015] The utility model solves the problem of poor stability of air passing through a special muffler for high-frequency fans by arranging a fixed shell and an air delivery cavity. When the air passes through a breathable disk in the fixed shell for noise reduction and is delivered to the air delivery cavity, it first passes through a breathable net and is uniformly delivered. After being homogenized by the breathable net, it is delivered between the spiral blades. The air passes between the spiral blades and is further uniformly delivered, so that the air is delivered to the exhaust port and discharged into the exhaust pipe at the bottom of the fixed shell. The airflow is uniformly delivered to the exhaust device for work, so that when the air passes through the special muffler for high-frequency fans, the output airflow stability of the air is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a partial cross-sectional structural stereogram of a muffler specially used for high-frequency fans;

[0018] Figure 2 It is a three-dimensional diagram of the cross-sectional structure of the fixed shell part;

[0019] Figure 3 It is a three-dimensional diagram of the structure of the air permeable disk;

[0020] Figure 4 It is a three-dimensional diagram of the cross-sectional structure of the gas delivery cavity;

[0021] Figure 5 This is a three-dimensional diagram of the assembly structure of a special silencer for high-frequency fans.

[0022] Reference numerals:

[0023] 1. Fixed shell; 101. Air inlet pipe; 102. Exhaust pipe; 103. Mounting ring; 2. Breathable disk; 201. Air outlet; 202. Flexible connecting ring; 203. Fixed ring; 204. Reinforcement plate; 3. Air delivery cavity; 301. Exhaust outlet; 302. Spiral blade; 303. Reinforcement column; 304. Breathable net. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0025] See also Figure 1-5 The utility model is a special silencer for high-frequency fans, comprising a fixed shell 1, a ventilating plate 2 and an air delivery cavity 3. The inner bottom of the fixed shell 1 is fixed with the air delivery cavity 3. When the fixed shell 1 is working, the air passing through the ventilating plate 2 is discharged through the air delivery cavity 3. The top of the air delivery cavity 3 is open. The air delivery cavity 3 is open through the top, so that the air passing through the ventilating plate 2 can be input therein. The upper part of the inner wall of the air delivery cavity 3 is fixed with spiral blades 302 in an annular array. The spiral blades 302 allow the air entering the air delivery cavity 3 to enter the air delivery cavity 3. The air in the air delivery cavity 3 drives it to vibrate, so that the kinetic energy carried by the air is reduced and evenly dispersed, and the air is delivered to the exhaust port 301. A plurality of mutually parallel fixing rings 203 are fixed on the inner wall of the fixed shell 1 above the air delivery cavity 3. A flexible connecting ring 202 is fixed on the inner ring of each fixing ring 203. A breathable disk 2 is fixed on the inner ring of the flexible connecting ring 202. The flexible connecting ring 202 is connected to its inner wall through the fixing ring 203, and the breathable disk 2 is fixed therein through the flexible connecting ring 202.

[0026] Specifically, an exhaust pipe 102 is fixedly connected to the center of the bottom end of the fixed shell 1, and a mounting ring 103 is fixed to the lower part of the peripheral side of the exhaust pipe 102. The fixed shell 1 discharges the air entering therein through the exhaust pipe 102, and the exhaust pipe 102 and the air extraction equipment are connected to the opposite bank through the mounting ring 103, so that the air transported in the exhaust pipe 102 is transported to the air extraction equipment.

[0027] Furthermore, reinforcing plates 204 are fixed in a circular array at the top and bottom edges of the fixing ring 203, and each reinforcing plate 204 is fixed on the inner wall of the fixed shell 1. When the fixing ring 203 is working, the reinforcing plates 204 increase the stability of the fixing on the inner wall of the fixed shell 1.

[0028] Furthermore, each air permeable disk 2 is provided with an air hole 201 which is vertically penetrated therein. The air hole 201 is eccentrically arranged in the air permeable disk 2, and the air holes 201 on two adjacent air permeable disks 2 are staggered with each other. When the air permeable disk 2 is working, when air passes through the air hole 201, the air vibrates when passing through the air permeable disk 2, reducing the energy of transmission and the noise of air transmission.

[0029] Furthermore, an air inlet pipe 101 is fixedly connected to the center of the top of the fixed shell 1 , and the bottom end of the air inlet pipe 101 and the center of the air vent 201 on the air permeable plate 2 are staggered with each other, and air is transported to the fixed shell 1 through the air inlet pipe 101 .

[0030] The operation process of this embodiment is as follows: when working, air is transported to the fixed shell 1 through the air intake pipe 101, and then blown to the breathable plate 2. In the process of air passing through the breathable plate 2, after the air enters the breathable port 201 on the breathable plate 2, it drives the breathable plate 2 to vibrate. The vibration of the breathable plate 2 is separated from the fixed ring 203 by the flexible connecting ring 202, thereby reducing the vibration transmitted to the fixed ring 203 and reducing noise. By setting a plurality of breathable plates 2, the air entering the fixed shell 1 can be fully reduced in noise. Specific embodiment 2

[0031] See also Figure 1 , 2 4. On the basis of the specific embodiment 1, a reinforcing column 303 is fixed to one side of all spiral blades 302 close to the central axis of the air delivery cavity 3, and an air permeable net 304 is fixed to the inner wall of the air delivery cavity 3 above the spiral blades 302. The bottom end of the air delivery cavity 3 is closed, and an exhaust port 301 is opened in the center of the bottom end of the air delivery cavity 3. The exhaust port 301 is connected to the exhaust pipe 102. The spiral blades 302 are connected together on their sides close to each other through the reinforcing column 303, and further receive the vibration of the air through the air permeable net 304, and the air entering therein is delivered to the exhaust pipe 102 through the exhaust port 301.

[0032] The operation process of this embodiment is as follows: during operation, after the air passes through the air permeable plate 2 for noise reduction in the fixed shell 1 and is transported to the air delivery cavity 3, it first passes through the air permeable net 304 and is transported uniformly. After being homogenized by the air permeable net 304, it is transported between the spiral blades 302. The air passes through the spiral blades 302 and is further transported uniformly, so that the air is transported to the exhaust port 301 and discharged into the exhaust pipe 102 at the bottom end of the fixed shell 1. The airflow is evenly transported to the exhaust equipment for operation.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A muffler for a high-frequency fan, comprising a fixed housing (1), a ventilating plate (2) and an air delivery cavity (3), characterized in that: An air delivery cavity (3) is fixed to the inner bottom of the fixed housing (1); the top of the air delivery cavity (3) is open; spiral blades (302) are fixed to the upper part of the inner wall of the air delivery cavity (3) in a circular array; a plurality of mutually parallel fixed rings (203) are fixed to the inner wall of the fixed housing (1) above the air delivery cavity (3); a flexible connecting ring (202) is fixed to the inner ring of each of the fixed rings (203); and a breathable disk (2) is fixed to the inner ring of each of the flexible connecting rings (202).

2. A high-frequency fan-specific muffler according to claim 1, characterized in that: The center of the bottom end of the fixed housing (1) is fixedly connected to an exhaust pipe (102), and a mounting ring (103) is fixed to the lower part of the peripheral side of the exhaust pipe (102).

3. A high-frequency fan-specific muffler according to claim 1, characterized in that: Reinforcement plates (204) are fixed in a circular array at the top and bottom edges of the fixed ring (203), and each reinforcement plate (204) is fixed on the inner wall of the fixed outer shell (1).

4. The high-frequency fan-specific muffler according to claim 1 is characterized in that: Each of the ventilation plates (2) is provided with a ventilation opening (201) extending vertically therethrough. The ventilation opening (201) is eccentrically arranged in the ventilation plate (2), and the ventilation openings (201) on two adjacent ventilation plates (2) are staggered with each other.

5. A special muffler for high-frequency fans according to claim 4, characterized in that: An air inlet pipe (101) is fixedly connected to the center of the top end of the fixed housing (1), and the bottom end of the air inlet pipe (101) and the center of the air permeable opening (201) on the air permeable plate (2) are arranged to be staggered with each other.

6. A special muffler for high-frequency fans according to claim 2, characterized in that: A reinforcing column (303) is fixed to one side of all the spiral blades (302) close to the central axis of the gas delivery cavity (3); a breathable net (304) is fixed to the inner wall of the gas delivery cavity (3) above the spiral blades (302); the bottom end of the gas delivery cavity (3) is closed, and an exhaust port (301) is provided in the center of the bottom end of the gas delivery cavity (3); the exhaust port (301) is communicated with the exhaust pipe (102).

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