KR20010065704A - Variable swash plate type compressor for vehicle - Google Patents

Abstract

PURPOSE: A variable capacity wobble plate compressor for motor vehicle is provided to achieve an improved productivity and quality of compressor by supporting the piston in a stable manner and enhancing abrasion resistance. CONSTITUTION: A variable capacity wobble plate compressor comprises a piston(14) inserted into a cylinder arranged between a front housing and a rear housing; a shaft mounted transversely in the center of the front and rear housings; a wobble plate fixed to the shaft and which moves the piston; a refrigerant suction chamber and a refrigerant outlet chamber formed by a diaphragm which is formed integrally with the rear housing; and a control valve disposed beneath the refrigerant outlet chamber and which adjust the pressure of the cylinder and the piston in correspondence with the pressure of a crank chamber. The piston has a shortened header(51), and has a wing(52) arranged at the rear of the piston to which the wobble plate is coupled. The wing is formed integrally with the piston. The header of the piston has a groove formed along the periphery of the header, and a seal ring(54) is inserted into the groove so as to improve sealing characteristics and abrasion resistance. The wing has a guide groove(55) formed at both ends of the wing, and a guide(57) to be fixed to a cylinder body is inserted into the guide groove so as to maintain the piston in a stable manner.

Description

Variable swash plate type compressor for vehicle {Variable swash plate type compressor for vehicle}

The present invention relates to a variable displacement swash plate compressor for automobiles, and more particularly, to an improved swash plate compressor applied to a variable displacement swash plate compressor to stably support a piston.

The compressor is necessary to repeatedly use the refrigerant during the refrigeration cycle operation of the air conditioner, and is to enable the cooling function of the vehicle together with the condenser, the expansion valve and the evaporator.

The evaporator receives a low temperature low pressure refrigerant passing through the expansion valve to absorb the heat of the air in the vehicle and evaporate to lower the vehicle interior temperature;

The compressor receives a heat exchanged refrigerant and compresses it to a high temperature and a high pressure, and then heat exchanges the condenser and then sends it to an expansion valve to recycle the refrigerant.

Compressors having the functions as described above have been developed and used in various kinds, the structure is also various.

In the past, the crank type mainly used the crank type, but small size and light weight are required. As the demand for low vibration and low noise increases, the adoption of the swash plate type and the rotating type is increasing. This is an important issue.

Swash plate type variable capacity compressor 10 to which the technique of the present invention is applied;

A plurality of cylinders 13 and a piston 14 are radially provided between the front housing 11 and the rear housing 12, and a crank chamber 15 is provided inward of the housings 11 and 12.

In the center transverse direction of the housing (11, 12) is provided with a shaft 18, which is supported by a bearing and equipped with a pulley 17 for receiving power from the engine by incorporating a magnet clutch 16 for power switching. do.

A sleeve 20 having a swash plate 19 is fixed to the shaft 18, and an operation lug 22 for connecting and driving the journal bearing 21 is fixed upright.

A valve plate 25 forms an inlet port 26 and an outlet port 27 between the front housing 11 and the rear housing 12, and the refrigerant is formed by a partition wall 28 integrally formed in the rear housing 12. The suction chamber 29 and the refrigerant discharge chamber 30 are configured.

Below the refrigerant discharge chamber 30 is a configuration having a control valve 31 for adjusting the pressure of the cylinder 13 and the piston 14 in response to the pressure of the crank chamber 15.

The swash plate type variable displacement compressor 10 as described above has a compression action while varying the capacity by changing the inclination angle of the swash plate 19 according to the pressure of the crank chamber 15 and the pressure of the cylinder 13 and the piston 14. It will be done.

Conventionally, as shown in FIG. 2, the outer diameter of the piston 1 of the compressor should be coated to overcome the abrasion caused by contact with the cylinder 2 and to maintain airtightness, and the piston 1 may be applied to the cylinder 2. There is a disadvantage that the length must be considerably long because of the stable support to be supported by.

When coating the piston as described above, a separate coating process is required, and the piston must be processed in a precise state according to the coating thickness, thereby providing a rising factor of the production cost by coating and high precision processing.

In particular, when the length of the piston is increased for the stable support of the piston, the overall length of the compressor is increased, so the weight of the compressor is increased, which is not a desirable phenomenon in view of the reality of compact and lightweight blades.

Accordingly, the present invention has been invented to solve the problems described above, and can support a stable state while shortening the length of the piston, and improve the wear resistance and airtightness to contribute to the improvement of the overall productivity and quality of the compressor. For the purpose of

1 is a cross-sectional view of a variable displacement swash plate compressor for explaining the present invention.

Figure 2 is a cross-sectional view of the piston portion of a variable displacement swash plate compressor applied in the prior art.

Figure 3 is a perspective view of the piston portion of the variable displacement swash plate compressor applied to the technology of the present invention.

Figure 4 is a perspective view of the piston portion of the variable displacement swash plate compressor applied to another technology of the present invention.

Figure 5 is a perspective view of the piston portion of the variable displacement swash plate compressor applied to another technology of the present invention.

* Description of the symbols used in the main parts of the drawings *

10; compressor

13; cylinder

14; piston

50; Piston support means

51; Header

52; whiz

53; Home

57; guide

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the preferred embodiment of the present invention for achieving the above object.

1 is an overall cross-sectional view of a variable displacement swash plate compressor for explaining the present invention, Figure 3 is a perspective view of the piston portion of the variable displacement swash plate compressor applied to the technique of the present invention, Figure 4 is another technique of the present invention The perspective view of the piston portion of the applied variable displacement swash plate compressor, Figure 5 will be described together as a perspective view of the piston portion of a variable displacement swash plate compressor applied to another technique of the present invention.

The variable displacement compressor 10 of the swash plate type for a vehicle has a plurality of cylinders 13 and pistons 14 between the front housing 11 and the rear housing 12 to have a radial shape, and the housings 11 and 12 of the housing 11 and 12 have a radial shape. The crank chamber 15 is provided inward.

In the center transverse direction of the housing (11, 12) is provided with a shaft 18, which is supported by a bearing and equipped with a pulley 17 for receiving power from the engine by incorporating a magnet clutch 16 for power switching. do.

A sleeve 20 having a swash plate 19 is fixed to the shaft 18, and an operation lug 22 for connecting and driving the journal bearing 21 is fixed upright.

A valve plate 25 forms an inlet port 26 and an outlet port 27 between the front housing 11 and the rear housing 12, and the refrigerant is formed by a partition wall 28 integrally formed in the rear housing 12. The suction chamber 29 and the refrigerant discharge chamber 30 are configured.

Below the refrigerant discharge chamber 30 is a configuration having a control valve 31 for adjusting the pressure of the cylinder 13 and the piston 14 in response to the pressure of the crank chamber 15.

In the present invention, it is an object to improve the piston 14 of the compressor 10 as described above and to further improve the productivity by further comprising a piston support means (50).

Looking at the technology of the present invention for achieving this object;

The header 51 of the piston 14 inserted into the cylinder 13 is shortly formed, and the wing 52 is integrally formed with the piston 14 at the rear of the piston 14 to which the swash plate 19 is coupled. .

The header 51 of the piston 14 is provided with a concave groove 53 in the circumferential direction, through a sealing 54 for improving airtightness and abrasion resistance.

Guide grooves 55 are formed at both ends of the wing 52 integrally formed at the rear of the piston 14 to be coupled to the guide 57 fixed to the body 56 of the cylinder 13 to form a piston 14. It is possible to maintain this stable state.

Another example is as shown in FIG. 4;

The guide hole 60 is formed at the edge of the wing 52 formed in the piston 14 so that the guide 57 fixed to the body 56 of the cylinder 13 is inserted in the inserted state.

Another example is as shown in FIG. 5;

The guide 57 is inserted into and fixed to the edge of the wing 52 formed in the piston 14, and the piston 14 forms an access hole through which the guide 57 can enter and exit the body 13. ) May be supported.

The present invention as described above;

Even if the header 51 of the piston 14 is formed short, the wing 52 formed integrally with the rear of the piston 14 is kept stable by the guide 57 fixed to the body of the cylinder 13. Will be.

Therefore, it is possible to shorten the length of the piston 14 to reduce the overall length of the compressor 10, and to add a separate coating process or to seal the piston 14 by interposing the sealing 54 to the piston 14 There is no hassle such as having to be processed to improve the productivity.

The present invention as described above has the effect of being able to support a stable state while shortening the length of the piston, and to improve the productivity and quality of the entire compressor by improving to maintain sufficient wear resistance and airtightness.

Claims (3)

A piston 14 inserted into a cylinder 13 provided between the front housing 11 and the rear housing phase 12; A shaft 18 installed in the center transverse direction of the housings 11 and 12; A swash plate (19) fixed to the shaft (18) to move the piston; The valve plate 25 forms an inlet 26 and an outlet 27 between the front housing 11 and the rear housing 12, and is constituted by a partition wall 28 integrally formed in the rear housing 12. A refrigerant suction chamber 29 and a refrigerant discharge chamber 30; A variable capacity of the swash plate type for automobiles having a control valve 31 for adjusting pressure of the cylinder 13 and the piston 14 in response to the pressure of the crank chamber 15 below the refrigerant discharge chamber 30. In the compressor (10); Forming a wing (52) integrally with the piston (14) at the rear of the piston (14) to which the header (51) of the piston (14) is shortened and the swash plate (19) is coupled; The header 51 of the piston 14 is provided with a concave groove 53 in the circumferential direction to seal the seal 54 to improve airtightness and wear resistance; Guide grooves 55 are formed at both ends of the wing 52 to be coupled to the guide 57 fixed to the body 56 of the cylinder 13 to maintain the piston 14 in a stable state. Variable displacement swash plate compressor for automobiles. The method of claim 1; A variable displacement swash plate for automobiles, characterized in that the guide hole 60 is formed at the edge of the wing 52 formed in the piston 14 to insert the guide 57 fixed to the body 13 of the cylinder 13. Equipped compressor. The method of claim 1; The guide 57 is inserted into and fixed to the edge of the wing 52 formed in the piston 14, and the piston 14 forms an access hole through which the guide 57 can enter and exit the body 13. A variable displacement swash plate compressor for automobiles, characterized in that it supports).