CN2578568Y

CN2578568Y - Composite double-layer silencer

Info

Publication number: CN2578568Y
Application number: CN 02265660
Authority: CN
Inventors: 陈琳; 黄波
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Hitachi Household Appliance Co Ltd; Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2002-07-22
Filing date: 2002-07-22
Publication date: 2003-10-08
Anticipated expiration: 2012-07-22

Abstract

The utility model relates to a composite double-layer silencer for a rotary compressor, which comprises two expanding single layer silencing sheets which are arranged at the upper end of a shell body of the compressor, wherein, a plurality of expansion chambers and at least one air outlet are arranged on each of the single layer silencing sheets, and the two single layer silencing sheets are mutually overlapped and fixedly connected with each other. The positions of each of the expansion chambers of an inner layer and each of the expansion chambers of an outer layer correspond to each other. Each of the corresponding expansion chambers of the inner layer can be contained by a cavity body of each of the expansion chambers of the outer layer. An air outlet of the silencing sheet of the inner layer and an air outlet of the silencing sheet of the outer layer are symmetrically arranged as much as possible. The phase interference effect which is produced by that the sound waves in a sound field are reflected in a hollow chamber. The number of the expansion chambers is increased in duplication after the structure of double layer multiple expansion chambers are adopted, and the positions of airflow outlets are reasonably arranged. Therefore, the silencing amount of the utility model is increase, the noise of middle and high frequency sections and the resonant sound in the space are greatly reduced to increase the silencing effect of the composite double-layer silencer.

Description

The double-deck baffler of combined type

Affiliated technical field

The utility model relates to air-conditioning, refrigerator and used for refrigerator rotary compressor, specifically refers to the improvement to the baffler of compressor.

Background technique

During compressor operating, compressed refrigerant is backed down the outside exhaust of exhaust valve plate by the exhaust port of the pump housing.Owing near exhaust port,, inspire very big pressure wave, thereby produce the high-decibel noise with rapid variation in pressure.Near the noise that produces the exhaust port is in the process of transmitting to other confined space, and is close as the intrinsic acoustics frequency in frequency noise and this space, also can inspire very high space sonorant.This power character noise is the main noise source of compressor.Reducing one of main path of this noise, is to use silencer near exhaust port.But the present individual layer baffler that generally adopts, the particularly last baffler of compressor upper end, often because of the restriction of position, expansion chamber is less, and causes the noise reduction frequency not wide, and the sound-damping qualities deficiency does not reach the erasure effect of expection.

Summary of the invention

The purpose of this utility model is to make full use of the limited volume in compressor upper end, proposes the double-deck baffler of a kind of combined type, adopts double-deck many expansion chambers structure, with increase sound-damping qualities and noise reduction frequency range, thus the erasure effect of raising baffler.

The utility model is design like this.In order to absorb the noise of different frequency range, should on a plurality of frequencies, design expansion chamber, and a plurality of expansion chambers are together in series, form even decay to the noise of a frequency band.And original individual layer baffler because its working space is limited, can't hold more expansion chamber.For this reason, the double layer construction that this baffler adopts two individual layer bloops to form, every layer of several expansion chamber of design, then two superimposed is together in series, in conjunction with rationally the arranging of flow outlet position, air-flow is through behind each expansion chamber again, and noise can significantly reduce on each frequency range of middle and high frequency.

A kind of rotary compressor of the present utility model double-deck baffler of combined type, comprise two expansion individual layer bloops of being located at the compressor housing upper end, each individual layer bloop is provided with some expansion chambers and at least one air outlet, and two individual layer bloops are overlapped and be connected mutually.

For making full use of volume limited in the compressor, each expansion chamber of described internal layer bloop is corresponding mutually with the position of each expansion chamber of outer bloop, and the cavity of the more outer expansion chamber of cavity of the inner layer expansion chamber that each is corresponding is little, the cavity that can be outer expansion chamber contains, the height of the cavity of inner layer expansion chamber is also lower slightly than outer field, so with inside and outside layer the mutual intussusception of expansion chamber of correspondence, the height after two-layer baffler is overlapping height with one deck basically is suitable.

Because the housing of compressor is columniform basically, and can evoke very big dipole sound field in cylinder interior, air outlet symmetry on the internal and external layer bloop is placed, therefore help improving erasure effect, the air outlet of the air outlet of described internal layer bloop and the outer bloop symmetric arrays of need trying one's best.

Owing to utilize the phase interference effect that sound wave produces in the cavity internal reflection in the sound field, and after adopting double-deck many expansion chambers structure, the expansion chamber number is multiplied, and rationally arranged in the flow outlet position, thereby sound-damping qualities increases, the noise of middle and high frequency range and space sonorant all reduce significantly, have improved the erasure effect of baffler greatly.

Description of drawings

Fig. 1 is an an embodiment's of the present utility model plan view, and dotted line is the profile line of internal layer bloop expansion chamber among the figure;

Fig. 2 is the P-P sectional drawing of Fig. 1;

Fig. 3 is the schematic perspective view of the foregoing description, and wherein 3A is double-deck baffler, and 3B is outer bloop, and 3C is the internal layer bloop.

Embodiment

Now the utility model is described in further detail in conjunction with an embodiment and accompanying drawing thereof.

By Fig. 1, Fig. 2, the utility model comprises internal layer 1 and outer 2 two expansion individual layer bloops, each individual layer bloop is provided with some expansion chamber A and at least one air outlet B, two individual layer bloops are overlapped, and be fixed together mutually with some solder joint C, form the double-deck baffler of a combined type.Establish plurality of fixed hole D on the whole baffler, baffler is fixed on the upper end of compressor by bolt.

The position of each expansion chamber A21, A22 of each expansion chamber A11, A12 of described internal layer bloop, A13, A14, A15 and outer bloop, A23, A24, A25 is corresponding mutually, and the cavity of each corresponding inner layer expansion chamber is (as A1 _i) more outer expansion chamber is (as A2 _i) cavity little, can be outer field cavity and contain, the height of internal layer cavity is also lower slightly than outer field, so with the mutual intussusception of expansion chamber of the inside and outside layer of correspondence, the height after two-layer bloop is overlapping height with one deck basically is suitable.Although therefore the quantity of expansion chamber has increased by one times, the volume of whole baffler does not increase.

The air outlet of internal layer bloop and the air outlet of outer bloop respectively have 2: B ₁₁, B ₁₂With B ₂₁, B ₂₂, described internal layer air outlet and outer air outlet are the symmetry axis symmetric arrays with a diameter XY of the housing of compressor.

The gas of discharging from cylinder vent (being positioned at the offside of internal layer air outlet hole) divides two-way to flow at each expansion chamber cavity of internal layer earlier, passes through two air outlet B of internal layer then ₁₁, B ₁₂Enter outer expansion chamber, and in outer each expansion chamber cavity, flow, at last from outer field two air outlet B ₂₁, B ₂₂Flow out.After adopting baffler of the present utility model, near Mid Frequency the 630Hz and the high band more than the 3150Hz, noise all declines to a great extent.The operation noise that reduces compressor there is obvious effects.

Claims

1. a rotary compressor is with the double-deck baffler of combined type, comprise the bloop that is provided with expansion chamber, it is characterized in that forming by two expansion individual layer bloops of being located at the compressor housing upper end, each individual layer bloop is provided with some expansion chambers and at least one air outlet, and two individual layer bloops are overlapped and be connected mutually.

2. the double-deck baffler of combined type according to claim 1, each expansion chamber that it is characterized in that described internal layer bloop is corresponding mutually with the position of each expansion chamber of outer bloop, and the cavity of each inner layer expansion chamber is little than the cavity of corresponding outer layer expansion chamber, can be outer field cavity contains, the height of whole internal layer cavity is lower than the height of outer cavity, and it is outdoor that each outer expansion chamber is nested in corresponding inner layer expansion.

3. the double-deck baffler of combined type according to claim 1 and 2 is characterized in that described internal layer air outlet and outer air outlet respectively establish 2, and internal layer air outlet and outer air outlet are the symmetry axis symmetric arrays with a diameter of compressor housing.