阅读说明：本技术 一种消音器组件 (Silencer assembly ) 是由 张海明 钱建明 朱谷昌 张宝 贡莉 李�浩 钟建龙 屠彬彬 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种消音器组件,属于消音器技术领域,包括壳体,所述壳体上的上部设有进气口、壳体的下部设有出气口,所述壳体内部设有第一环形腔和第二环形腔,所述第一环形腔和第二环形腔同心设置,所述第一环形腔位于第二环形腔的外部,所述第一环形腔内设有消音结构,所述第二环形腔的外侧壁通过第一气孔与所述第一环形腔连通,当气体流速较快时,更多的气体进入消音结构中,当气体流速较慢时,则进入消音结构中的气体更少,从而减缓消音结构的老化,解决了现有技术中消音器由于持续与气流发生摩擦,导致容易老化的问题。(The invention discloses a silencer assembly, which belongs to the technical field of silencers and comprises a shell, wherein the upper part of the shell is provided with an air inlet, the lower part of the shell is provided with an air outlet, a first annular cavity and a second annular cavity are arranged inside the shell, the first annular cavity and the second annular cavity are concentrically arranged, the first annular cavity is positioned outside the second annular cavity, a silencing structure is arranged in the first annular cavity, the outer side wall of the second annular cavity is communicated with the first annular cavity through a first air hole, when the gas flow rate is higher, more gas enters the silencing structure, when the gas flow rate is lower, less gas enters the silencing structure, so that the aging of the silencing structure is slowed down, and the problem that the silencer is easy to age due to continuous friction with air flow in the prior art is solved.)

1. A silencer assembly comprises a shell, wherein an air inlet is formed in the upper portion of the shell, an air outlet is formed in the lower portion of the shell, and the silencer assembly is characterized in that a first annular cavity and a second annular cavity are arranged inside the shell, the first annular cavity and the second annular cavity are arranged concentrically, the first annular cavity is located outside the second annular cavity, a silencing structure is arranged in the first annular cavity, the second annular cavity is communicated with the first annular cavity through a first air hole in the outer side wall of the second annular cavity, and gas moves in the second annular cavity in the circumferential direction while moving downwards.

2. The muffler assembly of claim 1 wherein a partition is disposed within the housing, an inlet chamber is disposed above the partition, the first and second annular chambers are disposed below the partition, the inlet is in communication with the inlet chamber, and the inlet chamber is in communication with the second annular chamber.

3. A muffler assembly as set forth in claim 2 further including a one-way return passage communicating a lower portion of said second annular chamber with said inlet chamber, said one-way return passage for directing gas from said lower portion of said second annular chamber to said inlet chamber.

4. A muffler assembly as claimed in claim 3, wherein said one-way return passage includes a return chamber, said return chamber is located inside said second annular chamber, the bottom of said return chamber is closed, a first one-way valve hole is provided on the inner side wall of the lower portion of said second annular chamber, said first one-way valve hole is communicated with said return chamber, and said return chamber is communicated with said inlet chamber.

5. The muffler assembly of claim 4, wherein a buffer plate is further installed in the return chamber, the buffer plate having a second one-way valve hole formed therein, and an upper side of the buffer plate forming a buffer space.

6. A muffler assembly as claimed in claim 5, wherein said first one-way valve hole is provided with a first one-way rubber valve body at a side toward said return chamber, and said second one-way valve hole is provided with a second one-way rubber valve body at a side toward said intake chamber.

7. A silencer assembly according to claim 5 or 6, wherein a spring retainer is mounted on the inner wall of the return chamber, a buffer spring is connected to the underside of the buffer plate, and the lower end of the buffer spring is mounted in the spring retainer.

Technical Field

The invention relates to the technical field of silencers, in particular to a silencer assembly.

Background

In the working process of the air conditioning system, the pressure pulsation can generate larger noise, so that the use comfort is influenced, and in order to reduce the noise generated by the system, a silencer component is required to be installed in an exhaust pipe; the existing silencer component mainly converts part of sound energy into heat energy through the friction between a silencing structure and airflow, thereby realizing the effect of noise reduction; however, since the pressure pulsation generated during the use of the air conditioner is unstable, if the noise reduction of the air flow is continued, the temperature of the silencer is easily kept at a high value, and the deterioration is accelerated.

For example, the chinese patent document discloses "a silencer for a vehicle air conditioner pipe", with publication number CN108674122B, including: the silencer comprises a silencer body, wherein a silencer cover body is welded at the lower end of the silencer body, and the silencer cover body and the silencer body are sealed to form a silencing cavity; the baffle plate is arranged in the silencer body, the baffle plate enables the silencing cavity to form a left cavity and a right cavity, a channel is formed between the top end of the baffle plate and the upper end of the silencer body, and the left cavity and the right cavity are communicated through the channel; the spiral pipe is positioned in the left cavity, a spiral boss is arranged on the inner wall of the spiral pipe, the spiral boss extends from the lower end of the spiral pipe to the upper end of the spiral pipe in a spiral mode, and a plurality of first exhaust holes are formed in the inner wall of the spiral pipe; the air inlet pipe is welded on the cover body of the silencer, and the upper end of the air inlet pipe extends towards the inner cavity of the spiral pipe; the exhaust pipe is welded on the muffler cover body, and the upper end of the exhaust pipe is flush with the inner wall of the muffler cover body and communicated with the right cavity. The application provides an automobile air conditioner pipeline muffler has good noise cancelling effect, however, its weak point lies in, in the long-term in-process of using, because the air current that passes through constantly takes place the friction with amortization structure, can lead to the muffler temperature to be in higher value to its ageing with higher speed.

Disclosure of Invention

The invention aims to solve the problem that the silencer is easy to age due to continuous friction with airflow in the prior art, and provides a silencer assembly which can perform silencing only when the gas is easy to generate noise (when the flow rate is high) by utilizing the characteristic of unstable airflow pulsation, so that the friction between the airflow and the silencer is generated at intervals, and the aging of the silencer is slowed down.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention discloses a silencer assembly, which comprises a shell, wherein an air inlet is formed in the upper part of the shell, an air outlet is formed in the lower part of the shell, a first annular cavity and a second annular cavity are formed in the shell, the first annular cavity and the second annular cavity are concentrically arranged, the first annular cavity is positioned outside the second annular cavity, a silencing structure is arranged in the first annular cavity, the outer side wall of the second annular cavity is communicated with the first annular cavity through a first air hole, and gas moves in the second annular cavity in the circumferential direction while moving downwards.

The gaseous circumference motion around the second annular chamber that carries out when getting into the casing downstream in the second annular chamber, when the gas velocity of flow is very fast, centrifugal force when it makes the circumference motion is also big more, more gaseous can get into first annular chamber through first gas, and through the friction amortization in the amortization structure of first annular chamber, thereby consume the acoustic energy, reach the purpose of noise abatement, and if the gas velocity of flow is slow, then more gaseous can be in the second annular chamber direct downstream to gas outlet department, because the gas velocity of flow is slow, the noise that it produced is also less, consequently, the demand to the amortization is less, thereby can reduce the friction of gaseous and amortization structure, thereby slow down the ageing of amortization structure.

Preferably, a partition plate is arranged in the shell, an air inlet cavity is arranged above the partition plate, the first annular cavity and the second annular cavity are both positioned below the partition plate, the air inlet is communicated with the air inlet cavity, and the air inlet cavity is communicated with the second annular cavity; the silencer structure can be more compact through the scheme.

Preferably, the muffler assembly further comprises a one-way return passage communicating a lower portion of the second annular chamber with the intake chamber, the one-way return passage for directing gas from the lower portion of the second annular chamber to the intake chamber; when the gas velocity of flow is faster, it is great to mean atmospheric pressure, and at this moment, partial gas can get into one-way return channel to play the cushioning effect, make when the gas velocity of flow is great, more gas can not directly leave from the second ring chamber bottom, but can leave again after the amortization of amortization structure.

Preferably, the one-way backflow channel comprises a backflow cavity, the backflow cavity is located inside the second annular cavity, the bottom of the backflow cavity is closed, a first one-way valve hole is formed in the inner side wall of the lower portion of the second annular cavity, the first one-way valve hole is communicated with the backflow cavity, and the backflow cavity is communicated with the air inlet cavity; the first one-way valve hole in the backflow cavity can prevent gas in the backflow cavity from reversely flowing into the second annular cavity, so that the gas can flow from the lower part of the second annular cavity to the air inlet cavity through the backflow cavity.

Preferably, a buffer plate is further installed in the backflow cavity, a second one-way valve hole is formed in the buffer plate, and a buffer space is formed on the upper side of the buffer plate; when the flow rate of the entering gas is reduced, the air pressure in the gas inlet cavity is smaller, the air pressure on the upper side of the buffer plate in the reflux cavity is also smaller, and the buffer plate can move upwards, so that the gas in the buffer space enters the gas inlet cavity; when the flow rate of the entering gas is increased, the air pressure in the air inlet cavity is higher, the air pressure on the upper side of the buffer plate in the reflux cavity is also higher, and the buffer plate can move downwards, so that the amount of the gas entering the second annular cavity is reduced; through the scheme, the flow velocity of the airflow entering the second annular cavity can be more uniform, so that the condition that more gas directly leaves from the lower part of the second annular cavity without entering the first annular cavity when the flow velocity of the airflow is too high is avoided.

Preferably, a first one-way rubber valve body is installed at one side of the first one-way valve hole facing the backflow cavity, and a second one-way rubber valve body is installed at one side of the second one-way valve hole facing the air inlet cavity; the second check valve body; the function that the one-way valve can be opened only when the air pressure at one side is larger can be realized by utilizing the elasticity of the rubber valve body.

Preferably, a spring snap ring is installed on the inner wall of the backflow cavity, a buffer spring is connected to the lower side of the buffer plate, and the lower end of the buffer spring is installed in the spring snap ring; through buffer spring can realize reciprocating of buffer board, when buffer board upside gas pressure is great, the buffer board can move down, and the one-way rubber valve body of second is at the in-process that moves down, because the existence of inertial force, can upwards open more easily, when avoiding admission pressure great, the one-way valve body of second can't be opened, the unable circumstances that realizes of backward flow.

Therefore, the invention has the following beneficial effects: (1) by utilizing the unstable characteristic of airflow pulsation, the silencer is silenced only when the gas is easy to generate noise (when the flow rate is high), so that the friction interval between the airflow and the silencer is generated, and the aging of the silencer is slowed down; (2) the flow velocity of the gas entering the second annular cavity can be balanced, so that the condition of poor silencing effect when the flow velocity of the gas is too high is avoided; (3) when the air pressure in the second annular cavity is higher, the gas can return to the air inlet cavity through backflow, so that the silencing effect is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a partial perspective view of the present invention.

In the figure: 1. the air inlet structure comprises a shell 2, an air inlet 3, an air outlet 4, a first annular cavity 5, a second annular cavity 7, a first air hole 8, a partition plate 9, an air inlet cavity 10, a backflow cavity 11, a first one-way valve hole 12, a buffer plate 13, a second one-way valve hole 14, a buffer space 15, a spring snap ring 16, a buffer spring 17, an outer sound-absorbing plate 18, an inner sound-absorbing plate 19, a vertical air inlet section 20, an oblique air outlet section 21 and an air outlet cavity.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

In the embodiment shown in fig. 1-2, a silencer assembly comprises a housing 1, an air inlet 2 in the upper part of the housing, an air outlet 3 in the lower part of the housing, a first annular cavity 4, a second annular cavity 5 and a one-way return channel are arranged in the shell, the first annular cavity and the second annular cavity are concentrically arranged, the first annular cavity is positioned outside the second annular cavity, a silencing structure is arranged in the first annular cavity, the second annular cavity is communicated with the first annular cavity through a first air hole 7, and gas moves downwards in the second annular cavity and simultaneously moves circumferentially around the second annular cavity; a partition plate 8 is arranged in the shell, an air inlet cavity 9 is arranged above the clapboard, the first annular cavity and the second annular cavity are both positioned below the clapboard, the air inlet is communicated with the air inlet cavity, and the air inlet cavity is communicated with the second annular cavity; the one-way backflow channel communicates the lower part of the second annular cavity with the air inlet cavity; the one-way return channel is used for guiding gas from the lower part of the second annular cavity to the gas inlet cavity; the one-way backflow channel comprises a backflow cavity 10, the backflow cavity is located inside the second annular cavity, the bottom of the backflow cavity is closed, a first one-way valve hole 11 is formed in the inner side wall of the lower portion of the second annular cavity, the first one-way valve hole is communicated with the backflow cavity, and the backflow cavity is communicated with the air inlet cavity; a buffer plate 12 is further installed in the backflow cavity, a sealing ring is installed on the outer side of the buffer plate, a second one-way valve hole 13 is formed in the buffer plate, and a buffer space 14 is formed on the upper side of the buffer plate; a first one-way rubber valve body is arranged at one side of the first one-way valve hole facing the backflow cavity, and a second one-way rubber valve body is arranged at one side of the second one-way valve hole facing the air inlet cavity; a spring snap ring 15 is mounted on the inner wall of the backflow cavity, a buffer spring 16 is connected to the lower side of the buffer plate, and the lower end of the buffer spring is mounted in the spring snap ring; the silencing structure comprises an annular outer silencing plate 17 and an inner silencing plate 18, the outer silencing plate is connected with the outer side wall of the first annular cavity, and the inner silencing plate is connected with the inner side wall of the first annular cavity; a plurality of silencing grooves are formed in the outer silencing plate and the inner silencing plate; a plurality of air guide pipes are uniformly distributed on the partition board in the circumferential direction, and each air guide pipe comprises a vertical air inlet section 19 and an inclined air outlet section 20 for eccentrically guiding air into the second annular cavity; the included angle between the axis of the oblique air outlet section and the axis of the vertical air inlet section is 20 degrees; the first air holes are positioned between the two adjacent outer sound-absorbing plates and the inner sound-absorbing plate in height position; and an air outlet cavity 21 is arranged at the lower part in the shell, the air outlet cavity is respectively communicated with the first annular cavity and the second annular cavity, and the air outlet cavity is separated from the reflux cavity.

When gas enters from the gas inlet, the gas firstly enters the gas inlet cavity, then enters the second annular cavity through the gas guide pipe, the moving direction of the gas entering the second annular cavity is obliquely downward and moves circumferentially around the axis of the second annular cavity under the guiding action of the oblique gas outlet section of the gas guide pipe, and in the circumferential movement process, part of the gas enters the first annular cavity through the first gas hole under the action of centrifugal force; the gas entering the first annular cavity is rubbed with the silencing grooves when passing through the outer silencing plate and the inner silencing plate, and the sound energy is converted into heat energy, so that the silencing effect is achieved; without the gas entering the first annular chamber moving directly downwards; and the gas in the first annular cavity and the second annular cavity moves downwards and then enters the gas outlet cavity and leaves the silencer from the gas outlet.

Because the flow rate of the gas entering the silencer is unstable, when the flow rate of the gas is high, the circumferential movement speed of the gas entering the second annular cavity is high, so that the gas can enter the first annular cavity more easily, the amount of the gas contacting with the silencing structure is increased, and the silencing effect is improved; on the contrary, when the gas flow rate is slower, the silencing effect is weaker, but the aging process of the silencing structure can be slowed down.

In addition, when the air pressure in the second annular cavity is higher, the gas can enter the backflow cavity through the first one-way valve hole, the situation that the gas with larger pulsation directly leaves the silencer without passing through the silencing structure is reduced, and when the air pressure in the second annular cavity is lower, the gas in the backflow cavity can enter the air inlet cavity, so that the effect of balancing the air flow is achieved; when the air pressure in the first air inlet cavity is large, the buffer plate can be pressed downwards, and the second one-way rubber valve body is opened upwards easily under the assistance of the inertia force, so that the air below the buffer plate escapes into the buffer space, and the situation that the rubber valve body of the first one-way valve body cannot be opened and backflow cannot be realized due to the increase of the air pressure in the space below the buffer plate is avoided.