CN102588284A

CN102588284A - Rotary compressor

Info

Publication number: CN102588284A
Application number: CN2012100932401A
Authority: CN
Inventors: 潘湘
Original assignee: Panasonic Wanbao Appliances Compressor Guangzhou Co Ltd
Current assignee: Panasonic Wanbao Appliances Compressor Guangzhou Co Ltd
Priority date: 2012-03-31
Filing date: 2012-03-31
Publication date: 2012-07-18
Anticipated expiration: 2032-03-31
Also published as: CN102588284B

Abstract

The invention discloses a rotary compressor, comprising a crankshaft, an air cylinder, an upper bearing, a lower bearing, a piston, a sliding block and a resonance chamber, wherein the resonance chamber is formed by communicating an exhaust incision, an exhaust small slot and a resonance cavity sequentially, the exhaust small slot is arranged on the upper bearing, and the resonance cavity is arranged at the top surface of the sliding block, moves along with the sliding block and is separated from or communicated with the exhaust small slot. The rotary compressor disclosed by the invention can solve the defects of a traditional design, so that when the air cylinder is used for compressing air at a certain appointed compression angle, a high-pressure air column of the air cylinder can enter the resonance chamber at a special position, the exhaust small slot and the resonance cavity at the top surface of the sliding block are separated when the piston exceeds the certain angle, and the high-pressure air column in the resonance cavity can not reversely flow, thus the high-pressure air column in the resonance chamber is prevented from reversely flowing into the air cylinder, and a problem that the suction efficiency of a traditional compression machine decreases is solved; and in addition, the sliding block can be pressed by the high-pressure gas reserved in the resonance cavity, the vibration of the sliding block is prevented, and the reliability is improved.

Description

A kind of rotary compressor

Technical field

The present invention relates to compressor field, particularly a kind of rotary compressor.

Background technique

Closed rotary compressor needs compression assembly and electric machine assembly usually, like Fig. 1, shown in 2, comprises housing 1, liquid-storage container 2, rotor/stator 3 and compression assembly; Existing compression assembly comprises bent axle 14, cylinder 16, upper bearing (metal) 11`; Lower bearing 15, piston 13 and slide block 5`.Piston 13 in the compression assembly is installed on cylinder 16 inside with slide block 5`; Cylinder 16 set inside have the rotary crankshaft 14 that has eccentric part; The upper and lower end face of cylinder 16 is by metal (upper 11,15 sealings, and like this, just having formed one in cylinder 16 inside can eccentric cavity.And compression afterwards, is discharged cylinder 16 with refrigerant compressed from the refrigeration agent that sucking pipe sucks in the pressing chamber of this cylinder 16, is discharged to outside the compressor by outlet pipe, and like this, compressor has just been accomplished our desired compression motion.Usually, the exhaust cavity at cylinder 16 is provided with resonant chamber (resonant chamber of indication is by exhaust otch 24 on the ordinary meaning, and exhaust sulculus 22 is formed with resonant cavity 23, and is as shown in Figure 2).During compressor operating, in exhaust process, the pressurized gas in the cylinder 16 get into resonant cavitys 23 by the exhaust otch 24 exhaust sulculus 22 of flowing through; When compressor changes breathing process over to by exhaust process, be low pressure in the cylinder, at this moment the pressurized gas in the resonant cavity 23 are back to cylinder 16 inside through exhaust sulculus 22 through exhaust otch 24; This part pressurized gas is in reflux course, because exhaust sulculus 22 circulation passages are smaller, the frequency of pressurized gas constantly changes; When self the frequency of natural frequency and external sound wave is identical, promptly plays the effect that acoustic vibration is offset, thereby reach the effect of noise reduction; And in the process of each time compression-air-breathing-exhaust; Pressurized gas in the cylinder 16 vibrate back and forth, and constantly some gas vibrates back and forth, acts on the effect of noise reduction.

The resonant chamber that present traditional rotary compressor is used belongs to Helmholtz resonator, and in theory, such resonator must be that the fluting (exhaust sulculus) on the exhaust otch is connected with resonant cavity; Gas column in the resonant cavity vibrates back and forth under the effect of acoustic pressure and moves reciprocatingly; When the natural frequency of external sound wave and gas column itself is identical, produce resonance, because there is frictional damping in the wall of exhaust sulculus; This is absorbed acoustic energy to change heat energy into to greatest extent, thereby reaches the effect of noise reduction.Though realized the effect of noise reduction, owing to need gas column vibration back and forth, gas column is in the process by resonant cavity backhaul to cylinder; All flowed into the cylinder air aspiration cavity,, made this part pressurized gas expand owing to be the gas inflow low pressure chamber of high pressure; Occupied the volume of partial cylinders air aspiration cavity; Just made the volume reducing of air aspiration cavity, the gettering efficiency of compressor descends, and energy has just lost.On the other hand, (both sides are the suction and discharge side, and it is big to receive the suction and discharge variation in pressure owing to stressed unbalancedization of slide block; The back is an exhaust pressure, and tip is the piston motion holding power), make the stressed very uneven of slide block; A lot of situation bottom slide blocks can be because the variation of compressor operating operating mode cause slide block itself to tremble, and such shaft strength that can cause cooperating with slide block to compressor of trembling is unbalanced; Thereby cause oil film to set up bad and wear and tear, influence the reliability of compressor.

Summary of the invention

For solving the problems of the technologies described above, the purpose of this invention is to provide a kind of rotary compressor, with respect to traditional structure, it is transferred, and the dynamic formula resonant chamber can effectively solve because the problem that the gas backstreaming of resonant chamber inner high voltage causes the compressor efficiency to descend; Can solve the problem of trembling of slide block in the compressor operation again.

The objective of the invention is to realize like this: a kind of rotary compressor comprises bent axle, cylinder; Upper bearing (metal), lower bearing, piston; Slide block and resonant chamber; Said resonant chamber is communicated with successively by exhaust otch, exhaust sulculus and resonant cavity and forms, and it is characterized in that: described exhaust sulculus is arranged on upper bearing (metal), and described resonant cavity is arranged on the slide block end face and moves and cut off or conducting with the exhaust sulculus with slide block.

Described exhaust sulculus is located at the bottom surface of upper bearing (metal).

Described exhaust otch is located at the top edge of cylinder inner wall.

Said resonant cavity and exhaust sulculus cut off in the compressor air-discharging process in the conducting of compressor air suction process.

The present invention can solve the deficiency on the traditional design; Make cylinder when a certain specific compression angle pressurized gas; High pressure air pole in the cylinder can get into resonant chamber at special position, and when piston had been crossed several angle, the resonant cavity of exhaust sulculus and slide block end face was cut off; High pressure air pole in the resonant cavity can't reflux; Pressurized gas can only be stayed in the resonant cavity or permeate away through the slit between slide block and the bearing, thereby stop the High pressure air pole in the resonant chamber to pass back into cylinder, have so just solved the problem that the traditional compressor gettering efficiency descends; And the pressurized gas that slide block can be left on its resonant cavity push down, and have prevented trembling of slide block, have improved reliability.

Description of drawings

Fig. 1 is the rotary compressor structural representation;

Fig. 2 is the structural representation of slide block in the existing technology, resonant chamber;

Fig. 3 is the structural representation of compression assembly of the present invention;

Fig. 4 is the bottom surface structural representation of upper bearing (metal) of the present invention;

Fig. 5 is the cylinder upper-end surface structural representation behind the installation slide block of the present invention;

Fig. 6 is the birds-eye perspective of compression assembly of the present invention;

Fig. 7-Fig. 9 is the partial enlarged drawing (exhaust sulculus and resonant cavity on state) of resonant chamber timesharing campaign of the present invention;

Figure 10-Figure 13 is the timesharing campaign schematic representation (exhaust sulculus and resonant cavity cut off state) of compression assembly of the present invention.

Embodiment

As shown in Figure 1, rotary compressor of the present invention comprises housing 1, liquid-storage container 2, rotor/stator 3 and compression assembly equally.Compression assembly comprises bent axle 14, cylinder 16, upper bearing (metal) 11, lower bearing 15, piston 13, slide block 5 and resonant chamber.

Like Fig. 3-shown in Figure 6, resonant chamber is communicated with successively by exhaust otch 161, exhaust sulculus 111 and resonant cavity 51 and forms.Exhaust otch 161 is located at cylinder 16 inwalls.Exhaust sulculus 111 is arranged on upper bearing (metal) 11, and its inlet end is communicated with exhaust otch 161, and the outlet side extends to slide block 5 end faces.Resonant cavity 51 is arranged on slide block 5 end faces, thereby can move and cut off or conductings with exhaust sulculus 111 with slide block 5, and when resonant cavity 51 moved to below, exhaust sulculus 111 outlet sides, both were conducting.For ease of processing, exhaust sulculus 111 preferably is opened on the bottom surface of upper bearing (metal) 11 (like Fig. 4).Perhaps exhaust sulculus 111 also can be located in the upper bearing (metal) 11, as long as the opening of its inlet end and outlet side is opened in the bottom surface.For ease of processing, exhaust otch 161 preferably is located at the top edge (like Fig. 5) of cylinder 16 inwalls.

The compressor piston exhaust begins when exhaust finishes, resonant cavity and the conducting of exhaust sulculus; Exhaust finishes, and during air-breathing beginning, cuts off between resonant cavity and the exhaust sulculus.In order to make cylinder when a certain specific compression angle pressurized gas; High pressure air pole in the cylinder can get into resonant chamber at special position; This specific compression angle should be according to resonant cavity 51, and settings such as the position of exhaust sulculus 111, size, angle begin when exhaust finishes as long as can realize exhaust; Resonant cavity and the conducting of exhaust sulculus, other cut off constantly and get final product.In the present embodiment, when piston goes to the scope of about ± 15 ° of slide block center line (α shown in Figure 6 is about 30 °), resonant cavity and the conducting of exhaust sulculus.

Fig. 7-Fig. 8 shows is the position relation of cylinder each compression member when beginning to compress: at this constantly; Piston 13 motion angle also are in exhaust process; Slide block 5 moves to the position of exhaust sulculus 111 conductings of its resonant cavity 51 and upper bearing (metal) 11, and pressurized gas are got into the resonant cavity 51 of slide blocks 5 by exhaust sulculus 111;

Fig. 9 shows is the position view of cylinder when piston 13 relative Fig. 7 turn over resonant chamber and open operating angle α when beginning to compress relatively, at this constantly, also is in high pressure conditions in the cylinder, and resonant chamber is interior all to be pressurized gas; Exhaust process also finishes, because piston 13 does not also turn over the edge of cylinder air inlet, cylinder 16 does not also change suction condition over to.In case crossed this constantly, slide block 5 promptly moves to the position of exhaust sulculus 111 partitions of its resonant cavity 51 and upper bearing (metal) 11, and the pressurized gas in the resonant cavity 51 can not reflux;

Figure 10 to Figure 13 shows is the position view of cylinder 16 when piston turns over all angles when beginning to compress relatively; As shown in the figure, at these constantly, piston 13 has turned over slide block 5; This moment, cylinder 16 changed over to air-breathing and exhaust process; Because slide block 5 still is positioned at the location status that the exhaust sulculus 111 of its resonant cavity 51 and upper bearing (metal) 11 cuts off, thus the pressurized gas in the resonant cavity 51 still can't reflux through exhaust sulculus 111, but owing to being pressurized gas in the resonant cavity 51; These a part of pressurized gas can permeate away along the slit between slide block 5 and the cylinder wall, have so just accomplished the exhaust process of resonant chamber.When piston 13 turns over above-mentioned angle; Resonant chamber can be accomplished the process of pressurized gas infiltration emptying; Thereby reached the effect of resonant chamber noise reduction; But can not get back to cylinder during the pressurized gas infiltration that this part gets into resonant chamber, also reduce the energy loss of cylinder and can play the effect of pushing down slide block.

Claims

1. a rotary compressor comprises bent axle, cylinder; Upper bearing (metal), lower bearing, piston; Slide block and resonant chamber; Said resonant chamber is communicated with successively by exhaust otch, exhaust sulculus and resonant cavity and forms, and it is characterized in that: described exhaust sulculus is arranged on upper bearing (metal), and described resonant cavity is arranged on the slide block end face and moves and cut off or conducting with the exhaust sulculus with slide block.

2. rotary compressor according to claim 1 is characterized in that: described exhaust sulculus is located at the bottom surface of upper bearing (metal).

3. rotary compressor according to claim 1 is characterized in that: described exhaust otch is located at the top edge of cylinder inner wall.

4. according to claim 1,2 or 3 described rotary compressors, it is characterized in that: said resonant cavity and exhaust sulculus cut off in the compressor air-discharging process in the conducting of compressor air suction process.