CN100343531C

CN100343531C - Micropole diffusor of rotary compressor

Info

Publication number: CN100343531C
Application number: CNB021170282A
Authority: CN
Inventors: 李旺; 张旭; 黄协清; 畅云峰; 秦首伟; 张铁山; 赵呈国
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2002-04-29
Filing date: 2002-04-29
Publication date: 2007-10-17
Anticipated expiration: 2022-04-29
Also published as: CN1455114A

Abstract

The present invention relates to a microhole silencer of a rotary compressor, which comprises a silencer having a thin-wall casing and a shape of an annular flat cylinder with a hole in the middle, an annular hollow chamber is formed in the silencer, an opening is arranged in the lower part of the silencer, and the silencer is covered above an upper bearing. A shaft collar of the upper bearing is penetrated through the hole in the middle of the silencer which is fixed to the upper bearing by screws, and air holes for silencing are arranged in the surface of the thin-wall casing of the silencer. The present invention has the advantages that gaseous coolant enters an expansion chamber of the silencer to consume the energy of noise via expansion and the silencing of a plurality of air holes, the noise is effectively attenuated, and the intensity of the noise is greatly reduced.

Description

The micropole diffusor of rotary compressor

Technical field

The present invention relates to a kind of compressor, particularly relate to a kind of micropole diffusor of rotary compressor.

Background technique

Rotary compressor is widely used in various refrigerators, the air-conditioning, rotary compressor sucks the gaseous coolant through evaporator evaporation, after it is compressed to full resultant pressure, be discharged into the work system of refrigerant again, rotary compressor is the compressor that can suck and discharge gaseous coolant continuously.

The compressor of representing among Fig. 1 is the rolling rotor-type rotary compressor, as seen from Figure 1, rotary compressor has airtight casing 10, the stator 21 of rotary compressor motor and rotor 22 are installed in the top of casing 10, rotor 22 center fixed have eccentric shaft 30, cylinder of compressor body 40 is positioned at the bottom of airtight casing 10, the eccentric shaft part 31 that eccentric shaft 30 is arranged in the cylindrical cylinder hole of cylinder block 40 central authorities, on the external cylindrical surface of eccentric shaft part 31 rolling rotor is arranged, when eccentric shaft part 31 carries out the circular motion rotation with eccentric shaft 30 in cylinder-bore, the rolling rotor compression enters the gaseous coolant in the cylinder block 40, also has the height of separation in the cylinder block, the baffle plate (not shown) of low pressure area refrigerant, the upper and lower end face of cylinder block 40 is fixed with blanket gas cylinder body end face, and supports the upper bearing 51 and the lower bearing 52 of eccentric shaft 30 rotations.

In the side of airtight casing 10 sucking pipe 60 is arranged, sucking pipe 60 makes refrigerant enter the pressing chamber 41 of compressor cylinder block 40.Outlet valve (the figure electricity does not show) is installed on the upper-end surface of upper bearing 51, outlet valve is discharged to the pressing chamber of refrigerant by cylinder block 40 in the baffler 80, again by being rejected in the baffler 80 in the airtight casing 10, there is outlet pipe 70 top of airtight casing 10, and outlet pipe 70 enters the refrigerant in the airtight casing 10 circulatory system of refrigerant.Baffler 80 is installed above upper bearing 51, baffler 80 is the thin-walled case, profile is the middle porose oblate cylindricality of ring-type, the inner cavity that forms annular, lower openings covers on upper bearing 51 tops, and the upper-end surface that penetrates upper bearing 51 in the hole in the middle of the baffler surrounds cavity, after being positioned at refrigerant that the outlet valve of upper bearing upper end discharges and entering the cavity of baffler 80, the exhaust port on baffler 80 sides enters in the closed shell 10 again.

After the rolling rotor rotary compressor of said structure is connected power supply, rotor 22 rotations in the airtight casing 10, make the rotation of eccentric shaft 30 and rolling rotor, compression enters the refrigerant of cylinder block 40 in cylinder block 40, when the refrigerant in the pressing chamber 41 reaches certain pressure, the outlet valve that is installed in upper bearing 51 upper-end surfaces is opened, compressed refrigerant enters baffler, pore through baffler enters in the closed shell 10 again, when the pressure of pressing chamber descends, drain tap is closed, and prevents that refrigerant from refluxing, and at this moment compressor is in the state that sucks refrigerant.

The flowing state of the air-flow that drain tap is discharged is the periodically pulsing air-flow, and air-flow has very big impact and variation in pressure.

During rotary compressor work, the switching that reaches drain tap of flowing of gaseous coolant all can cause very strong impact noise, and very wide frequency domain is arranged, it is the main noise source of rotary compressor, have the relatively simple for structure of baffler 80 now, erasure effect is bad, and especially to the noise of particular frequency bands, erasure effect is poorer.

Summary of the invention

Technical problem to be solved by this invention is, a kind of micropole diffusor of rotary compressor is provided, and the noise that gaseous coolant flows and drain tap produces is effectively decayed, and reduces the intensity of noise greatly.

The technical solution adopted in the present invention is: a kind of micropole diffusor of rotary compressor, comprise that baffler is the thin-walled case, profile is the middle porose oblate cylindricality of ring-type, the inner cavity that forms annular, lower openings covers on compressor upper bearing top, penetrates the necked part of upper bearing in the hole in the middle of the baffler, baffler is screwed on upper bearing, is distributed with most the pores that are used for noise reduction on the thin-walled case face of described baffler.

Beneficial effect of the present invention is: gaseous coolant enters the expansion chamber of baffler, through expansion and most pore noise reductions, consumes the energy of noise, and effective attenuate acoustic noise reduces the intensity of noise greatly.

Description of drawings

Fig. 1 is the sectional arrangement drawing of rotary compressor;

Fig. 2 is first kind of embodiment's a front elevation;

Fig. 3 is the A-A sectional drawing of Fig. 1;

Fig. 4 is second kind of embodiment's a front elevation

Fig. 5 is the third embodiment's a front elevation

In the drawings:

10. airtight casing 21. stators 22. rotors 30. eccentric shafts 31. eccentric shaft parts

40. cylinder block 41. compressing areas 51. upper bearings, 52. lower bearings, 60. suction ports

70. exhaust port 80,100. bafflers 81. pores

Embodiment

The structure of compressor of the present invention is as shown in Figure 1: rotary compressor has airtight casing 10, the stator 21 of rotary compressor motor and rotor 22 are installed in the top of casing 10, rotor 22 center fixed have eccentric shaft 30, cylinder of compressor body 40 is positioned at the bottom of airtight casing 10, the eccentric shaft part 31 that eccentric shaft 30 is arranged in the cylindrical cylinder hole of cylinder block 40 central authorities, on the external cylindrical surface of eccentric shaft part 31 rolling rotor is arranged, when eccentric shaft part 31 carries out the circular motion rotation with eccentric shaft 30 in cylinder-bore, the rolling rotor compression enters the gaseous coolant in the cylinder block 40, also has the height of separation in the cylinder block, the baffle plate (not shown) of low pressure area refrigerant, the upper and lower end face of cylinder block 40 is fixed with blanket gas cylinder body end face, and supports the upper bearing 51 and the lower bearing 52 of eccentric shaft 30 rotations.

In the side of airtight casing 10 sucking pipe 60 is arranged, sucking pipe 60 makes refrigerant enter the pressing chamber 41 of compressor cylinder block 40.The outlet valve (not shown) is installed on the upper-end surface of upper bearing 51, outlet valve is discharged to the pressing chamber of refrigerant by cylinder block 40 in the baffler 100, again by being rejected in the baffler 100 in the airtight casing 10, there is outlet pipe 70 top of airtight casing 10, and outlet pipe 70 enters the refrigerant in the airtight casing 10 circulatory system of refrigerant.

As Fig. 2, shown in Figure 3, baffler 100 is the thin-walled case, profile is the middle porose oblate cylindricality of ring-type, the inner cavity that forms annular, lower openings covers on compressor upper bearing 51 tops, penetrates the necked part of upper bearing 51 in the hole in the middle of the baffler 100, baffler 100 is screwed on upper bearing 51, and the thin-walled case face of baffler 100 is provided with the pore 81 that is used for noise reduction.

As shown in Figure 2, but pore 81 branches on 1/2 case face of baffler 100;

As shown in Figure 4, but pore 81 also branch on 1/3 case face of baffler 100;

As shown in Figure 5, but pore 81 also branch on the whole case face of baffler 100.

After the rolling rotor rotary compressor of said structure is connected power supply, rotor 22 rotations in the airtight casing 10, make the rotation of eccentric shaft 30 and rolling rotor, compression enters the refrigerant of cylinder block 40 in cylinder block 40, when the refrigerant in the pressing chamber 41 reaches certain pressure, the outlet valve that is installed in upper bearing 51 upper ends is opened, compressed refrigerant enters baffler, pore through the baffler side enters in the closed shell 10 again, when the pressure of pressing chamber descends, drain tap is closed, and prevents that refrigerant from refluxing, and at this moment compressor is in the state that sucks refrigerant.

The present invention adopts aperture formula noise reduction principle, and the periodically pulsing air communication that drain tap is discharged is crossed a plurality of apertures and reduced noise.The aperture of different-diameter, position and quantity, to the noise elimination effect difference of different frequency range noise, the structure of sound proof housing should adapt with the noise properties of compressor.

Claims

1. the micropole diffusor of a rotary compressor, comprise that baffler (100) is the thin-walled case, profile is the middle porose oblate cylindricality of ring-type, the inner cavity that forms annular, lower openings, cover on compressor upper bearing (51) top, penetrate the necked part of upper bearing (51) in the hole in the middle of the baffler (100), baffler (100) is screwed on upper bearing (51), it is characterized in that, be distributed with most the pores (81) that are used for noise reduction on the thin-walled case face of described baffler (100).

2. the micropole diffusor of rotary compressor according to claim 1 is characterized in that, described pore (81) branch is on 1/2 case face of baffler (100).

3. the micropole diffusor of rotary compressor according to claim 1 is characterized in that, described pore (81) branch is on 1/3 case face of baffler (100).

4. the micropole diffusor of rotary compressor according to claim 1 is characterized in that, described pore (81) branch is on the whole case face of baffler (100).