CN103912753B

CN103912753B - Pipe-expanding-type silencer

Info

Publication number: CN103912753B
Application number: CN201410163831.0A
Authority: CN
Inventors: 陈澎钰
Original assignee: Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Midea Refrigerator Co Ltd
Priority date: 2014-04-22
Filing date: 2014-04-22
Publication date: 2017-02-22
Anticipated expiration: 2034-04-22
Also published as: CN103912753A

Abstract

The invention provides a pipe-expanding-type silencer and aims at solving the problem that pipe-expanding-type silencers are poor in effect on eliminating noise generated by airflow pressure pulsation in the prior art. The pipe-expanding-type silencer comprises a pipe. A cavity used for allowing airflow to pass is defined by the pipe. A first retaining plate, which is transverse relative the axial direction of the pipe, is arranged in the cavity in a manner of being capable of axially moving relative to the pipe. One end of an elastic connecting member is fixed to the first retaining plate while the other end of the same is fixed to an attaching device on or in the pipe to enable the elastic connecting member to be capable of extending and contracting axially. An airflow passing portion allowing the airflow to penetrate axially is arranged on the first retaining plate. Compared with existing pipe-expanding-type silencers, the pipe-expanding-type silencer has the advantages of being better in silencing effect and having good effect on eliminating the noise generated by pressure pulsation.

Description

Expand trumpet type silencer

Technical field

The present invention relates to expansion trumpet type silencer.

Background technology

In refrigeration system, conventional muffler mostly expands trumpet type silencer at present.Expand trumpet type silencer be resistant noise-reducing device One of conventional version, its main noise reduction principle is：Cause acoustic impedance change using the abrupt change of cross-section of pipeline so that one The sound wave along pipe transmmision is divided to be reflected back sound source；Meanwhile, the change of transit chamber, room and/or inner connecting tube length etc. is so as to forward pass The sound wave broadcast produces phase difference between the back wave on different tube sections, interferes, thus reaching the purpose of noise reduction.

Expander formula muffler structure is simple, but erasure effect is to be improved.Especially, existing expansion trumpet type silencer only passes through Realize sound wave reflection, interfere to realize noise reduction purpose, for elimination by gas with pipe, chamber combination at the mutation of acoustic characteristic in pipeline The noise result that flowing pressure pulsation produces is not fine.

Fig. 1 diagrammatically illustrates a kind of expansion trumpet type silencer of prior art.Can have mutation in pipeline shown in Fig. 1 Place's (not shown), such as abrupt interface, and/or some other setting (not shown), such as pipe, chamber setting, will depending on noise reduction Ask.Air-flow enters pipeline from one end of pipeline；Air-flow pass through pipeline during, due at the mutation in pipeline and/or its He is arranged, and sound wave reflection occurs and/or interferes, and is achieved in noise reduction so that the air-flow flowing out the pipeline other end has reduction Noise.

Content of the invention

It is an object of the invention to provide a kind of have improve silencing function, for air-flow piercing device produce noise have The expansion trumpet type silencer of good erasure effect.

According to an aspect of the present invention, provide a kind of expansion trumpet type silencer, this expansion trumpet type silencer includes a pipe, described The chamber that one supply stream of pipe restriction passes through is it is characterised in that a first baffle is with respect to described pipe energy axially-movable Mode is arranged on described within the chamber transverse to the axial direction of described pipe, and a Flexible Connector one end is fixed to described first gear Plate, the other end be fixed on described pipe or an interior attachment location so that described Flexible Connector can along described axial stretching, Permission air-flow is had on wherein said first baffle and is upward through its air-flow by portion in described axle.

Compared to existing expansion trumpet type silencer, the expansion trumpet type silencer of the present invention passes through to set up by baffle plate and elastic connection The elastic equilibrium mechanism of part composition, can absorption pressure pulse to eliminate the noise of pressure fluctuation generation, simultaneously at least in part Single-unit muffler can be changed into two sections or more multi-section serial muffler, thus there is the soundproof effect of raising.

Brief description

Fig. 1 diagrammatically illustrates a kind of expansion trumpet type silencer of prior art.

Fig. 2 diagrammatically illustrates one kind exemplary expansion trumpet type silencer according to the present invention.

Fig. 3 diagrammatically illustrates the side view expanding baffle plate used in trumpet type silencer of Fig. 2.

Specific embodiment

Idea of the invention is that, muffler increases elastic equilibrium mechanism to absorb at least in part, to eliminate air-flow Single-unit muffler, to eliminate the noise of pressure fluctuation generation, is changed into two sections or more multi-section serial muffler by pressure fluctuation simultaneously, Improve soundproof effect.

The trumpet type silencer that expands of the present invention has mainly made following improvement on the basis of the expansion trumpet type silencer of prior art： Set up the elastic equilibrium mechanism being made up of baffle plate and Flexible Connector in the supply pipeline within the chamber passed through of stream so that by baffle plate Axially pipeline chamber is separated into two or more sub-chamber of connecting along pipeline, simultaneously so that in response to air-flow piercing device, Flexible Connector elastic telescopic deformation in pipeline axial direction, leads to baffle plate logical first to change air-flow with respect to pipeline axially-movable The volume of the sub-chamber crossed, thus absorbing, cutting down pressure fluctuation, keeps pipeline exit pressure constant.

Fig. 2 diagrammatically illustrates one kind exemplary expansion trumpet type silencer according to the present invention, and Fig. 3 diagrammatically illustrates Fig. 2 The side view expanding baffle plate used in trumpet type silencer.

As shown in Fig. 2 this muffler includes pipe 1, right baffle-plate 2, right shell body 2 and Flexible Connector 3.Pipe 1 limits a confession The chamber that air-flow passes through, each baffle plate 2 axial direction transverse to this pipe in the way of with respect to pipe 1 energy axially-movable is arranged on this Within the chamber, Flexible Connector 3 one end is fixed to right baffle-plate 2, and the other end is fixed to right shell body 2 so that Flexible Connector can be along pipe 1 Axial stretching deformation.Right baffle-plate 2 and right shell body 2 are axially spaced along pipe 1.By left and right baffle plate 2, the chamber of pipe 1 is divided It is divided into the sub-chamber of three series connection：It is respectively left sub-chamber, middle sub-chamber and right sub-chamber from left to right；That is, single-unit noise reduction Device is changed into three section mufflers.

Have on each baffle plate 2 and allow air-flow to be upward through its air-flow by portion in the axle of pipe 1.This air-flow can by portion To be through hole, as shown in Figure 3；Or, this air-flow can be in the recess of baffle plate periphery by portion.

The muffler operation principle of Fig. 2 is as follows.

By air-flow as a example the such as left port (import) of pipe 1 enters muffler, after air-flow enters muffler, first pass through Left sub-chamber, impacts right baffle-plate 2.If there is air-flow piercing device, when stream pressure increases, right baffle-plate 2 elasticity of compression is even Fitting 3, leads to Flexible Connector 3 elastic compression to deform, thus the left sub-chamber volume that air-flow first passes through increases, thus can disappear Subtract pressure fluctuation, absorption pressure pulsation energy is it is ensured that the pressure at another port (outlet) place of pipe 1 is as constant as possible；Work as air-flow When pressure reduces, Flexible Connector 3 elastic elongation, promote right baffle-plate 2, so that the left sub-chamber volume that air-flow first passes through is reduced, Thus compressed gas, the pressure of Shi Zuo sub-chamber increases, and thus can absorb pressure fluctuation energy it is ensured that the another port of pipe 1 (goes out Mouthful) pressure at place is as constant as possible.

Flexible Connector 3 can be selected for the flexible members such as spring, and its coefficient of elasticity can be according to the gas of the occasion using muffler Stream pulsation situation is suitably selected.

Flexible Connector 3 can be single spring, as shown in Figure 2.

Furthermore it is possible to expected, Flexible Connector 3 can be the sub-assembly of baffle plate and flexible member such as spring.For example, bullet Property connector 3 can include a baffle plate and be individually fixed in two flexible members of this baffle plate both sides, this two flexible members The end being not fixed to this baffle plate constitute the two ends of Flexible Connector 3, this baffle plate can be similar to above-mentioned left and right baffle plate 2 with relatively The mode of axially-movable can be arranged on the within the chamber of this pipe transverse to the axial direction of this pipe in pipe 1, and have fair on this baffle plate Permitted air-flow and be upward through its air-flow by portion in this axle.This air-flow can be through hole by portion or be located at the recessed of baffle plate periphery Portion.In this case, the operation principle of muffler is similarly as described above, and simply the chamber of pipe 1 is separated into more height Chamber, that is, single-unit muffler be changed into more more piece muffler, therefore erasure effect is more preferable.

Preferably, the air-flow on different baffle plates in above-mentioned each baffle plate passes through portion along the axial misalignment of pipe 1, that is, stagger, this Sample is conducive to preferably eliminating the noise.

Although in the muffler of Fig. 2, Flexible Connector 3 two ends are respectively fixed to a baffle plate 2, come for the present invention Say, this is optional.For example, spring fastenings 3 only can be fixed to a baffle plate 2 by one end such as left end, and it is another One end such as right-hand member can be directly fixed to pipe 1, for example, be attached to an attachment location on pipe 1 inwall；Now, Right shell body 2 in Fig. 2 can be omitted.

In one embodiment, pipe 1 constitutes the shell of muffler, can be made up of high-strength materials such as copper, steel.

In one embodiment, pipe 1 is provided with the limiting section of the axially-movable stroke for limiting each baffle plate, described limit Position portion can be for example the projection on inside pipe wall.

Above-mentioned each baffle plate can be made up of the larger material of rigidity or high damping material, and its material can be according to using muffler The gas situation of occasion selects.

It will be understood by those skilled in the art that similar to existing expansion trumpet type silencer in, the pipe of the muffler of the present invention Interior have at mutation, such as abrupt interface, and/or some other setting (not shown), for example pipe, chamber setting.

For the expansion trumpet type silencer of the present invention, the elastic equilibrium mechanism due to baffle plate and Flexible Connector composition can disappear Subtract, absorb air-flow piercing device, can preferably eliminate the noise being produced by pressure fluctuation；Simultaneously as baffle plate is by single-unit noise reduction Device is changed into two sections, three sections or more multi-section serial muffler, and erasure effect is more excellent.

Compared to existing expansion trumpet type silencer, soundproof effect is more preferable, to elimination pressure arteries and veins for the expansion trumpet type silencer of the present invention The raw noise of movable property has good effect.

Claims

1. expand trumpet type silencer, include a pipe, described pipe limits one and supplies the chamber that stream passes through it is characterised in that one First baffle is arranged on described within the chamber transverse to the axial direction of described pipe in the way of with respect to described pipe energy axially-movable, and one Individual Flexible Connector one end is fixed to described first baffle, and the other end is fixed on described pipe or an interior attachment location, makes Obtain described Flexible Connector permission air-flow to be had on wherein said first baffle and wear in described axial direction along described axial stretching Cross its air-flow and pass through portion, one of second baffle is in the way of with respect to described pipe energy axially-movable transverse to described pipe Axially it is arranged on described within the chamber, and is spaced apart with described first baffle along described axial direction, wherein said attachment location is located at On described second baffle, described second baffle has permission air-flow and is upward through its air-flow by portion in described axle, described The air-flow on different baffle plates in baffle plate passes through portion along described axial misalignment.

2. expansion trumpet type silencer according to claim 1, wherein said Flexible Connector is a spring.

3. expansion trumpet type silencer according to claim 1, wherein said Flexible Connector includes a third baffle and divides Be not fixed on two flexible members of this third baffle both sides, described two flexible members be not fixed to described third baffle End is respectively described one end of described Flexible Connector and the described other end, and wherein said third baffle is with respect to described pipe energy The mode of axially-movable is arranged on described within the chamber transverse to the axial direction of described pipe, and described third baffle has permission air-flow It is upward through its air-flow in described axle and pass through portion.

4. expansion trumpet type silencer according to claim 3, wherein said two flexible members are two springs.

5. the expansion trumpet type silencer according to claim 1 or 3, the wherein air-flow on each baffle plate by portion be through hole and/ Or it is located at the recess of its periphery.

6. expansion trumpet type silencer according to claim 1, is provided with the axial direction for limiting described baffle plate in wherein said pipe The limiting section of movement travel.

7. expansion trumpet type silencer according to claim 6, wherein said limiting section is the projection on the inwall of described pipe.

8. expansion trumpet type silencer according to claim 1, wherein said pipe constitutes the shell of described muffler.