CN103206377A

CN103206377A - Rotary compressor

Info

Publication number: CN103206377A
Application number: CN201210008485XA
Authority: CN
Inventors: 江波; 刘亚军; 杨径涛
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Midea Toshiba Compressor Corp; Guangdong Meizhi Compressor Co Ltd
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2013-07-17
Anticipated expiration: 2032-01-11
Also published as: CN103206377B

Abstract

A rotary compressor comprises a compression mechanism portion and a motor portion which are arranged in a sealed container, wherein the sealed container is composed of a shell, an upper cover and a lower cover, the compression mechanism portion comprises a cylinder, a piston eccentrically rotating in the compression chamber of the cylinder, a crankshaft driving the piston to rotate, an upper bearing and a lower bearing which support the crankshaft and the sealed compression chamber, and a slide sheet having a back allowing the front end of the slide sheet to be connected to the outer circumference of the piston through a compression spring, the motor portion comprises a stator fixed on the shell and a rotor accommodated in the stator, the internal diameter of the chamber of the cylinder is D, the thickness of the slide sheet is T, the T/D value is not greater than 0.067, and the T/D value is not lower than 0.041. The rotary compressor realizes the compressor efficiency increase and compressor manufacturing cost reduction purposes through restricting the dimension of the thickness of the slide sheet, and has a simple structure and a wide application range.

Description

Rotary compressor

Technical field

The present invention relates to a kind of rotary compressor.

Background technique

For satisfying energy-conservation requirement, the efficiency grade of air conditioner is further promoted, require also more and more higher to the efficient of compressor.For improving the efficient of compressor, each workpiece of compressor is optimized, size is arranged in the best point, to reach the compressor efficiency optimum.Discharging under the certain situation of volume (V=π e (D-e) H), the cylinder diameter of cylinder changes with interlock highly, and cylinder diameter D is more big, and then the high H of cylinder (being the slide plate height H) is more little, has patent to propose to be conducive to the compressor efficiency lifting when H/D≤0.04.It limits cylinder height H (being the slide plate height H), it consider cylinder height H and slide plate side (with the surface of contact of cylinder vane slot) slippage loss relation and with the relation of 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 the slide plate thickness size, the space of improving compressor efficiency in addition.

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

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

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

Summary of the invention

Purpose of the present invention aim to provide a kind of simple in structure, applied widely, fabricating cost is low, effectively improve the rotary compressor of compressor efficiency, to overcome deficiency of the prior art.

A kind of rotary compressor by this purpose design, comprise the compression mechanical part and the motor section that are arranged in the seal container, wherein seal container is by housing, loam cake and lower cover are formed, compressing mechanism comprises cylinder, in the cylinder compression chamber, do the piston of eccentric rotation, the bent axle of driven plunger rotation, support the upper bearing (metal) in bent axle and seal compression chamber, lower bearing, and the back is by compressing the slide plate that spring joins its tip and piston periphery circle, motor section comprises and is fixed on the stator on the housing and is housed in rotor in this stator, its structure characteristic is that the 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 with upper cylinder, separates by dividing plate is set between the cylinder.

The present invention can realize the lifting of compressor efficiency and the purpose that manufacture cost reduces by the restriction to the slide plate thickness size, and it is simple in structure, and is applied widely.

Description of drawings

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

Fig. 2 is for the local slide plate slippage loss of compressing mechanism of the present invention and reveal schematic representation;

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

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

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

Among the figure: 1 is cylinder, and 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 loam cake, and 9 is lower cover, and 10 is stator, and 11 is rotor.

Embodiment

Below in conjunction with drawings and Examples the present invention is further described.

Referring to Fig. 1-Fig. 2, a kind of rotary compressor, comprise the compression mechanical part and the motor section that are arranged in the seal container, wherein seal container is by housing 7, loam cake 8 and lower cover 9 are formed, compressing mechanism comprises cylinder 1, in cylinder 1 compression chamber, do the piston 2 of eccentric rotation, the bent axle 3 of driven plunger 2 rotations, support the upper bearing (metal) 4 in bent axle 3 and seal compression chamber, lower bearing 5, and the back is by compressing the slide plate 6 that spring joins its tip and piston 2 periphery circles, motor section comprises the stator 10 that is fixed on the housing 7 and is housed in rotor 11 in this stator 10, cylinder 1 chamber internal diameter is D, slide plate 6 thickness are T, T/D≤0.067, and T/D 〉=0.041.Compressing mechanism is provided with a cylinder 1.Perhaps compressing mechanism is provided with two with upper cylinder 1, separates by dividing plate is set between the cylinder 1.

Referring to Fig. 3-Fig. 5, by research as can be known, 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, under the certain situation of cylinder diameter, if T/D increases, slide plate 6 thickness T must strengthen, and then the area that contacts with metal (upper of slide plate 6 increases, and make that the rubbing surface between slide plate 6 and the metal (upper increases, and the more thick formation that more is unfavorable for slide plate 6 top and bottom and bearing surface of contact oil film of slide plate 6, thereby the slippage loss w that slide plate 6 motions cause increases, and the compressor power consumption increases, and has reduced compressor efficiency.As can be seen from Figure 3, if we control T/D≤0.067, 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 that along with reducing of T/D, leakage of refrigerant amount m significantly increases.Its reason is, slide plate 6 thickness T reduce, sealed width between slide plate 6 upper and lower end faces and the metal (upper reduces, when sealed width is reduced to a certain degree, cylinder 1 inner refrigerant significantly increases by the amount of leakage m of slide plate 6 upper and lower end faces from exhaust cavity to air aspiration cavity, thereby reduce the volumetric efficiency of compressor, influence compressor efficiency.As can be seen from Figure 4, if we control T/D 〉=0.041, wherein slide plate 6 need be 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 seek a best point between slide plate 6 slippage loss w and leakage of refrigerant amount m, namely guarantee to reduce slippage loss under the situation of enough sealed widths as far as possible, therefore the present invention, the relation of T and D is set at: 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, thereby realize the high efficiency of rotary compressor.

Claims

1. rotary compressor, comprise the compression mechanical part and the motor section that are arranged in the seal container, wherein seal container is by housing (7), loam cake (8) and lower cover (9) are formed, compressing mechanism comprises cylinder (1), in cylinder (1) compression chamber, do the piston (2) of eccentric rotation, the bent axle (3) of driven plunger (2) rotation, support the upper bearing (metal) (4) in bent axle (3) and seal compression chamber, lower bearing (5), and the back is by compressing the slide plate (6) that spring joins its tip and piston (2) periphery circle, motor section comprises the stator (10) that is fixed on the housing (7) and is housed in the interior rotor (11) of 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.

2. rotary compressor according to claim 1 is characterized in that described compressing mechanism is provided with a cylinder (1).

3. rotary compressor according to claim 1 is characterized in that described compressing mechanism is provided with two with upper cylinder (1), separates by dividing plate is set between the cylinder (1).