CN103206377B

CN103206377B - Rotary compressor

Info

Publication number: CN103206377B
Application number: CN201210008485.XA
Authority: CN
Inventors: 江波; 刘亚军; 杨泾涛
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2015-11-18
Anticipated expiration: 2032-01-11
Also published as: CN103206377A

Abstract

A kind of rotary compressor, comprise and be arranged on compression mechanical part in seal container and motor section, wherein seal container is by housing, upper cover and lower cover composition, compressing mechanism comprises cylinder, the piston of eccentric rotary is done in cylinder compression chamber, the bent axle that driven plunger rotates, support the upper bearing (metal) in bent axle and seal compression chamber, lower bearing, and the slide plate that back makes its tip connect with piston outer periphery circle by Compress Spring, motor section comprises the stator be fixed on housing and the rotor be housed in this stator, it is characterized in that cylinder chamber internal diameter is D, slide plate thickness is T, T/D≤0.067, and T/D >=0.041.The present invention is by the restriction to slide plate thickness size, and can realize the lifting of compressor efficiency and the object of manufacture cost reduction, its structure is simple, applied widely.

Description

Rotary compressor

Technical field

The present invention relates to a kind of rotary compressor.

Background technique

For meeting power conservation requirement, the efficiency grade of air conditioner is promoted further, also more and more higher to the efficiency requirements of compressor.For improving the efficiency of compressor, each workpiece of compressor being optimized, size being arranged in Best Point, to reach compressor efficiency optimum.When discharging volume and being certain (V=π e (D-e) H), the cylinder diameter of cylinder and height linkage change, and cylinder diameter D is larger, then cylinder height H (i.e. slide plate height H) is less, there is patent to propose when H/D≤0.04, be conducive to compressor efficiency and promote.It limits cylinder height H (i.e. slide plate height H), it considers the relation of cylinder height H and slide plate side (with the surface of contact of cylinder vane slot) slippage loss and the relation with slide plate front end (with the contact position of piston) amount of leakage, but do not consider the relation of slide plate thickness T and slide plate upper and lower end face (with the surface of contact of bearing) slippage loss, as shown in Figure 3.And the relation of the amount of leakage of slide plate thickness T and slide plate upper and lower end face, as shown in Figure 4.Therefore by the optimization to slide plate thickness size, the space of compressor efficiency is also improved.

Rotary compressor in the past, D, T and T/D value of different size is as shown in table 1.

Table 1 is the value of D, T and T/D of well-known rotary compressor.

Therefore, the present invention can realize a kind of high efficiency rotary compressor by the scope limiting T/D.

Summary of the invention

Object of the present invention aims to provide that a kind of structure is simple, applied widely, fabricating cost is low, the rotary compressor of effective raising compressor efficiency, to overcome deficiency of the prior art.

By a kind of rotary compressor that this object designs, comprise and be arranged on compression mechanical part in seal container and motor section, wherein seal container is by housing, upper cover and lower cover composition, compressing mechanism comprises cylinder, the piston of eccentric rotary is done in cylinder compression chamber, the bent axle that driven plunger rotates, support the upper bearing (metal) in bent axle and seal compression chamber, lower bearing, and the slide plate that back makes its tip connect with piston outer periphery circle by Compress Spring, motor section comprises the stator be fixed on housing and the rotor be housed in this stator, its structure characteristic is cylinder chamber internal diameter is D, slide plate thickness is T, T/D≤0.067, and T/D >=0.041.

Described compressing mechanism is provided with a cylinder.

Described compressing mechanism is provided with two or more cylinder, by arranging baffle for separating between cylinder.

The present invention is by the restriction to slide plate thickness size, and can realize the lifting of compressor efficiency and the object of manufacture cost reduction, its structure is simple, applied widely.

Accompanying drawing explanation

Fig. 1 is the longitudinal sectional view of one embodiment of the invention rotary compressor;

Fig. 2 is compressing mechanism of the present invention local slide plate slippage loss and reveals schematic diagram;

Fig. 3 is the linear relationship chart of the T/D of embodiment's rotary compressor and the slippage loss of slide plate;

Fig. 4 is the T/D of embodiment's rotary compressor and the linear relationship chart of refrigrant leakage amount;

Fig. 5 is the T/D of embodiment's rotary compressor and the linear relationship chart of compressor efficiency.

In figure: 1 is cylinder, 2 is piston, and 3 is bent axle, and 4 is upper bearing (metal), and 5 is lower bearing, and 6 is slide plate, and 7 is housing, and 8 is upper cover, and 9 is lower cover, and 10 is stator, and 11 is rotor.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

See Fig. 1-Fig. 2, a kind of rotary compressor, comprise and be arranged on compression mechanical part in seal container and motor section, wherein seal container is by housing 7, upper cover 8 and lower cover 9 form, compressing mechanism comprises cylinder 1, the piston 2 of eccentric rotary is done in cylinder 1 compression chamber, the bent axle 3 that driven plunger 2 rotates, support the upper bearing (metal) 4 in bent axle 3 and seal compression chamber, lower bearing 5, and the slide plate 6 that back makes its tip connect with piston 2 periphery circle by Compress Spring, motor section comprises the stator 10 be fixed on housing 7 and the rotor 11 be housed in this stator 10, cylinder 1 chamber internal diameter is D, slide plate 6 thickness is T, T/D≤0.067, and T/D >=0.041.Compressing mechanism is provided with a cylinder 1.Or compressing mechanism is provided with two or more cylinder 1, by arranging baffle for separating between cylinder 1.

See Fig. 3-Fig. 5, known by studying, same discharge volume, the rotary compressor of same cylinder 1 cylinder diameter, the relation of T/D and slide plate 6 slippage loss w is, along with the increase of T/D, the corresponding increase of slippage loss w of slide plate 6.Its reason is, when cylinder diameter is certain, if T/D increases, slide plate 6 thickness T must strengthen, then the area that slide plate 6 contacts with metal (upper increases, and the rubbing surface between slide plate 6 and metal (upper is increased, and the more thick formation being more unfavorable for slide plate 6 top and bottom and bearing contact surfaces oil film of slide plate 6, thus slide plate 6 moves, the slippage loss w caused increases, and compressor power consumption increases, and reduces compressor efficiency.As can be seen from Figure 3, if T/D controls≤0.067 by we, then can reduce the slippage loss w of slide plate 6 greatly.

In addition, as can be seen from Figure 4, the relation of T/D and leakage of refrigerant amount m is, along with the reduction of T/D, leakage of refrigerant amount m significantly increases.Its reason is, slide plate 6 thickness T reduces, sealed width between slide plate 6 upper and lower end face and metal (upper reduces, when sealed width is reduced to a certain degree, cylinder 1 inner refrigerant is significantly increased by the amount of leakage m of slide plate 6 upper and lower end face from exhaust cavity to air aspiration cavity, thus reduce the volumetric efficiency of compressor, affect compressor efficiency.As can be seen from Figure 4, if T/D controls >=0.041 by we, wherein slide plate 6 needs enough thick, just can reduce the amount of leakage m of refrigeration agent greatly, improves compressor efficiency.

According to above analysis, for improving compressor efficiency, we need to seek a Best Point between slide plate 6 slippage loss w and leakage of refrigerant amount m, reduce slippage loss when namely ensureing enough sealed widths as far as possible, therefore the present invention, the relation of T and D is set as: T/D >=0.041, and T/D≤0.067.Utilize the present invention can reduce leakage rate m and the slide plate 6 slippage loss w of refrigeration agent greatly, thus realize the high efficiency of rotary compressor.

Claims

1. a rotary compressor, comprise and be arranged on compression mechanical part in seal container and motor section, wherein seal container is by housing (7), upper cover (8) and lower cover (9) composition, compression mechanical part comprises cylinder (1), the piston (2) of eccentric rotary is done in cylinder (1) compression chamber, the bent axle (3) that driven plunger (2) rotates, support the upper bearing (metal) (4) in bent axle (3) and seal compression chamber, lower bearing (5), and the slide plate (6) that back makes its tip connect with piston (2) periphery circle by Compress Spring, motor section comprises the stator (10) be fixed on housing (7) and the rotor (11) be housed in this stator (10), it is characterized in that cylinder (1) chamber internal diameter is D, slide plate (6) thickness is T, T/D≤0.067, and T/D >=0.041, described compression mechanical part is provided with two or more cylinder (1), by arranging baffle for separating between cylinder (1).