CN218065337U

CN218065337U - Noise silencer for fresh air inlet

Info

Publication number: CN218065337U
Application number: CN202222583537.8U
Authority: CN
Inventors: 陈鹏; 李丙义; 崔晓璐
Original assignee: Zhengzhou Zhonghuihe Refrigeration Parts Co ltd
Current assignee: Zhengzhou Zhonghuihe Refrigeration Parts Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2022-12-16
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to a noise silencer is used in fresh air inlet. The silencer comprises a cylinder body, wherein an air inlet pipe and an air outlet pipe are respectively arranged at two ends of the cylinder body, and first partition plates are arranged inside the cylinder body at intervals along the axis direction of the cylinder body so as to divide the inside of the cylinder body into a first cavity and a second cavity. One end of the air inlet pipe extends into the cylinder, and a plurality of first air outlet holes communicated with the first cavity are formed in the outer peripheral surface of the air inlet pipe part positioned in the cylinder. The first partition plate is provided with a flow distribution cylinder with an opening facing the first cavity and communicated with the first cavity, and the side wall of the flow distribution cylinder is provided with a plurality of second air outlets communicated with the second cavity. One end of the air outlet pipe extends into the cylinder body and is communicated with the second cavity. Fresh air enters the air inlet pipe, enters the first cavity through the first air outlet holes, then enters the flow dividing cylinder, enters the second cavity through the plurality of second air outlet holes in a dispersing mode, and finally is discharged through the air outlet pipe. Through the new trend air current of many dispersions, reduce the noise of new trend, compare with only using the sound cotton of inhaling, noise cancelling effect improves greatly.

Description

Noise silencer for fresh air inlet

Technical Field

The utility model relates to a new trend technical field of system, concretely relates to noise silencer for new trend mouth.

Background

With the increasing demand for quality of life, fresh air systems are also gradually introduced into residential and commercial buildings, as well as household air conditioners and central air conditioners, to supply fresh air from the outside to the inside of a room to improve the quality of air in the room. But there is the problem of noise in the new trend mouth department that fresh air got into, and people have designed the muffler in order to eliminate the noise of new trend mouth department. For example, the chinese utility model with the publication number CN 211550888U discloses a pipeline silencer used at the new air inlet of the new air system. This muffler includes outer bellows and inside polyurethane micropore foaming sponge pipe, and the both ends of bellows are provided with the connecting piece, and the air current is when passing through the bellows insidely, inhales the sound through polyurethane micropore foaming sponge pipe. The silencer is integrally in a pipeline type, is arranged on a fresh air pipeline, and occupies a small space in installation. However, the silencer only absorbs sound through the polyurethane microporous foamed sponge tube inside, and the polyurethane microporous foamed sponge tube can only absorb sound for a small part of airflow, so that the silencing effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a noise silencer is used in fresh air inlet to solve the poor problem of noise cancelling effect that exists among the prior art.

In order to achieve the above object, the utility model discloses a noise silencer for fresh air inlet adopts following technical scheme: a noise silencer for a fresh air inlet comprises a cylinder body, wherein an air inlet pipe is arranged at one end of the cylinder body, an air outlet pipe is arranged at the other end of the cylinder body, first partition plates are arranged in the cylinder body at intervals along the axis direction of the cylinder body so as to sequentially divide the interior of the cylinder body into a first cavity and a second cavity, one end of the air inlet pipe extends into the cylinder body, a plurality of first air outlet holes communicated with the first cavity are formed in the outer peripheral surface of the air inlet pipe part in the cylinder body, a flow distribution cylinder with an opening facing the first cavity and communicated with the first cavity is arranged on the first partition plates, and a plurality of second air outlet holes communicated with the second cavity are formed in the side wall of the flow distribution cylinder; one end of the air outlet pipe extends into the cylinder body and is communicated with the second cavity.

And a first sound absorption material layer is arranged on the inner wall of the first cavity.

And a second sound-absorbing material layer is arranged on the inner wall of the second cavity.

The cylinder is also internally provided with a second partition plate to divide the second chamber into a third chamber, and the end part of the air outlet pipe penetrates through the third chamber and the second partition plate and is connected with the second partition plate.

A first limiting pipe is arranged on the outer side of the first sound absorption material layer in the first cavity, and two ends of the first limiting pipe are respectively contacted with an end plate of the cylinder and the first partition plate; a second limiting pipe is arranged in the second cavity and outside the second sound-absorbing material layer, and two ends of the second limiting pipe are respectively contacted with the first partition plate and the second partition plate; a third limiting pipe is arranged in the third chamber, and two ends of the third limiting pipe are respectively contacted with the second partition plate and the other end plate of the cylinder body.

The quantity of reposition of redundant personnel section of thick bamboo is more than 3 to set up on first baffle along the even interval of circumference.

The utility model has the advantages that: the outside fresh air enters through the air inlet pipe, is dispersed into the first cavity through the first air outlet holes, then enters the flow dividing cylinder, is dispersed into the second cavity through the second air outlet holes on the flow dividing cylinder, and finally is discharged through the air outlet pipe to enter the air conditioning system or a corresponding fresh air system pipeline. Through the new trend air current of many dispersions, consume the air current energy, reduce the noise that the new trend brought, compare with only using among the prior art and inhale the sound cotton, noise elimination effect improves greatly.

Further, sound absorbing material layers are used in the first chamber and the second chamber, and the noise elimination effect is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the noise muffler for a fresh air inlet of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a second embodiment of the noise muffler for a fresh air inlet of the present invention.

Detailed Description

The utility model discloses an embodiment one of noise silencer for fresh air inlet, as shown in fig. 1-fig. 2, including barrel 1, the one end of barrel is provided with intake pipe 2, the other end is provided with outlet duct 3, and the intake pipe is used for connecting the filter and makes the new trend get into with filtering the new trend, and the outlet duct is used for connecting air conditioning system or other corresponding pipelines. The cylinder is internally provided with a first partition plate 4 and a second partition plate 5 at intervals along the axial direction of the cylinder so as to divide the inner cavity of the cylinder into a first chamber 6, a second chamber 7 and a third chamber 8. One end of the air inlet pipe extends into the cylinder, a plurality of first air outlet holes 9 communicated with the first cavity are formed in the outer peripheral surface of the air inlet pipe part in the cylinder, and therefore fresh air enters the first cavity from the air inlet pipe and is dispersed into the first cavity through the first air outlet holes.

The first partition plate is provided with a flow distribution cylinder 10 with an opening facing the first chamber and communicated with the first chamber, and the side wall of the flow distribution cylinder is provided with a plurality of second air outlets 11 communicated with the second chamber. The quantity of reposition of redundant personnel section of thick bamboo is more than 3 to set up on first baffle along circumference even interval, the quantity of reposition of redundant personnel section of thick bamboo is 4 in this embodiment. Fresh air in the first cavity enters the shunting cylinder through an opening at one end of the shunting cylinder, and enters the second cavity through the second air outlet holes in the shunting cylinders in a dispersing mode. One end of the air outlet pipe extends into the cylinder body and is communicated with the second cavity through the third cavity, and fresh air in the second cavity is exhausted out of the cylinder body through the air outlet pipe. The inner wall of the first chamber is provided with a first sound absorbing material layer 12. A second sound absorbing material layer 14 is provided on the inner wall of the second chamber. The sound absorbing material layer can be made of foam plastic sound absorbing material, such as polyurethane foam. One of an inorganic foam sound absorbing material, an inorganic fiber sound absorbing material, or an organic fiber sound absorbing material may also be used.

In order to facilitate manufacturing, the air inlet pipe and the first partition plate are welded together or integrally manufactured, and the air outlet pipe and the second partition plate are welded together or integrally manufactured. The cylinder is open at one end and has a bottom 17, i.e. an end plate at one end, and an open end plate 18, i.e. an end plate at the other end, is arranged at the opening. A first mounting hole for the air inlet pipe to pass through is formed in the cylinder bottom, and a second mounting hole for the air outlet pipe to pass through is formed in the opening end plate. A first limiting pipe 13 is arranged in the first cavity outside the first sound absorption material layer 12, and two ends of the first limiting pipe 13 are respectively contacted with an end plate (namely, a cylinder bottom 17) and a first partition plate of the cylinder body. And a second limiting pipe 15 is arranged on the outer side of the second sound-absorbing material layer 14 in the second cavity, and two ends of the second limiting pipe 15 are respectively contacted with the first partition plate 4 and the second partition plate 5. A third limiting pipe 16 is arranged in the third chamber, two ends of the third limiting pipe are respectively contacted with the second partition plate 5 and the other end plate (namely, the opening end plate 18) of the cylinder body, and the third limiting pipe is axially fixed in the above mode. The air inlet pipe and the cylinder bottom are welded together, the air outlet pipe and the opening end plate are welded together, the opening end plate and the cylinder body are welded together, and the whole silencer can be manufactured by welding the three parts. The setting of third chamber, it is fixed to support the play tuber pipe that can be fine, increases the intensity of play tuber pipe, but also can increase the barrel and the distance between the sound absorbing material layer in the junction of opening end plate and the second chamber, and the high heat is to the influence on sound absorbing material layer when avoiding welding.

When the novel air flow inlet device is used, fresh air flows pass through the air inlet pipe and enter the first cavity through the dispersion of the first air outlet holes, fresh air inside the first cavity enters the four shunting cylinders through the end openings of the four shunting cylinders and enters the second cavity through the dispersion of the second air outlet holes in the cylinder walls of the shunting cylinders, and the fresh air in the second cavity is discharged through the air outlet pipe, so that the noise of the fresh air flows can be greatly reduced. Moreover, the new trend can directly blow to first sound absorbing material layer by a plurality of first ventholes on the air-supply line after discharging, and likewise, the new trend of second venthole exhaust in the reposition of redundant personnel section of thick bamboo also can directly blow to the second sound absorbing material layer, is favorable to sound absorbing material layer's sound absorbing effect more.

The utility model discloses a noise silencer for fresh air inlet's embodiment two, as shown in fig. 3, the difference with embodiment one only lies in the spacing difference of tip of reposition of redundant personnel section of thick bamboo, and a reposition of redundant personnel section of thick bamboo of embodiment is the dead end towards the tip of second baffle, can set up the second venthole on the end plate of this dead end, also can not set up the second venthole, and this dead end separates with second baffle interval. In this embodiment, when the second partition plate is installed in place, the second partition plate is simultaneously contacted and pressed with the end of the second limiting pipe and the end of each shunt cylinder, so as to ensure the installation strength of each shunt cylinder.

In other embodiments of the present invention, the number of the shunt tubes can be adjusted according to actual needs, for example, 1, 2, 3 or 5 or more shunt tubes; the first clapboard and the air inlet pipe can also be in threaded connection; the second clapboard can be connected with the air outlet pipe through screw threads; on the premise that the strength of the air outlet pipe and the welding heat cannot influence the second sound-absorbing material layer in the second cavity, only one first partition plate can be arranged without arranging a second partition plate in the cylinder, and the second partition plate in the first embodiment serves as an opening end plate; when the noise reduction effect can be ensured, the sound absorption material layer does not need to be arranged inside the first cavity and the second cavity.

Claims

1. The utility model provides a noise silencer for fresh air inlet, includes the barrel, and the one end of barrel is provided with intake pipe, the other end is provided with outlet duct, its characterized in that: the inner part of the cylinder body is provided with first partition plates at intervals along the axis direction of the cylinder body so as to sequentially divide the inner part of the cylinder body into a first cavity and a second cavity, one end of the air inlet pipe extends into the inner part of the cylinder body, the outer peripheral surface of the part of the air inlet pipe positioned in the cylinder body is provided with a plurality of first air outlet holes communicated with the first cavity, the first partition plates are provided with shunting cylinders with openings facing the first cavity and communicated with the first cavity, and the side walls of the shunting cylinders are provided with a plurality of second air outlet holes communicated with the second cavity; one end of the air outlet pipe extends into the cylinder body and is communicated with the second cavity.

2. The noise muffler for a fresh air inlet according to claim 1, wherein: and a first sound absorption material layer is arranged on the inner wall of the first cavity.

3. The noise muffler for a fresh air inlet according to claim 2, wherein: and a second sound absorption material layer is arranged on the inner wall of the second chamber.

4. The noise muffler for a fresh air inlet according to claim 3, wherein: the cylinder is also internally provided with a second partition plate to divide the second chamber into a third chamber, and the end part of the air outlet pipe penetrates through the third chamber and the second partition plate and is connected with the second partition plate.

5. The noise muffler for a fresh air inlet according to claim 4, wherein: a first limiting pipe is arranged on the outer side of the first sound absorption material layer in the first cavity, and two ends of the first limiting pipe are respectively contacted with an end plate of the cylinder and the first partition plate; a second limiting pipe is arranged on the outer side of the second sound absorption material layer in the second cavity, and two ends of the second limiting pipe are respectively in contact with the first partition plate and the second partition plate; a third limiting pipe is arranged in the third chamber, and two ends of the third limiting pipe are respectively contacted with the second partition plate and the other end plate of the cylinder body.

6. The noise muffler for a fresh air inlet as set forth in any one of claims 1 to 5, wherein: the quantity of reposition of redundant personnel section of thick bamboo is more than 3 to set up on first baffle along the even interval of circumference.