KR101753403B1

KR101753403B1 - Compressor

Info

Publication number: KR101753403B1
Application number: KR1020110011175A
Authority: KR
Inventors: 김재엽
Original assignee: 한온시스템 주식회사
Priority date: 2011-02-08
Filing date: 2011-02-08
Publication date: 2017-07-03
Also published as: KR20120090640A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compressor, and more particularly, to a compressor capable of variously setting a discharge direction of a refrigerant discharged from a pressure relief valve used to relieve a pressure inside a compressor. The compressor according to the present invention is provided at one side of a housing constituting an outer appearance of a compressor and is provided with a pressure relief valve having an outlet for discharging the refrigerant to the outside when the pressure in the discharge path through which the compressed refrigerant is discharged is sensed, A valve, a body installed on the pressure relief valve and coupled to the upper side of the discharge port, a protrusion protruding upward from a central portion of the body, and a discharge portion formed by cutting one side of the body and the protrusion And a fixing means for fixing the change plate to the pressure relief valve. According to the compressor of the present invention, it is possible to easily change the outlet of the pressure relief valve in a desired direction by the customer while sharing the existing mold and at low cost.

Description

Compressor

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compressor, and more particularly, to a compressor capable of variously setting a discharge direction of a refrigerant discharged from a pressure relief valve used to relieve a pressure inside a compressor.

Generally, the automobile is provided with an air conditioner for cooling and heating. The air conditioner includes a compressor that compresses low-temperature and low-pressure refrigerant introduced from an evaporator into high-temperature and high-pressure refrigerant and sends it to a condenser. In such a compressor, a swash plate type compressor is generally used.

When the compressor is driven, the temperature of the evaporator is lowered. When the compressor is stopped, the temperature of the evaporator is increased.

In the swash plate type compressor, a swash plate having an inclination angle of a predetermined angle is provided on a rotating shaft provided in a compressor, and a piston in a cylinder bore connected to the swash plate reciprocates in conjunction with rotation of the rotating shaft to compress the refrigerant.

Such swash plate type compressors include a fixed capacity type and a variable capacity type. Generally, the discharge capacity of the variable displacement swash plate type compressor is achieved by controlling the inclination angle of the swash plate. When the cooling load is increased, the inclination angle of the swash plate is increased and when the cooling load is decreased, the inclination angle of the swash plate is controlled to be decreased. For reference, the angle of inclination of the swash plate means the angle formed by the plane perpendicular to the drive shaft and the swash plate.

1 is a sectional view showing the construction of a general variable capacity swash plate type compressor. The variable displacement swash plate type compressor includes a cylinder block 10 in which a plurality of cylinder bores 11 are radially formed and a crank chamber 21 coupled to a front portion of the cylinder block 10, And a rear housing 30 coupled to a rear portion of the cylinder block 10 to form a suction chamber 31 and a discharge chamber 33. [

The piston 40 is accommodated in the cylinder bore 11. The piston 40 reciprocates linearly to compress the working fluid flowing into the cylinder bore 11. [ The crank chamber 21 is provided with a driving unit 60 for reciprocating the piston 40. The driving unit 60 includes a driving shaft 61 rotated by receiving power and a sleeve 65 slidably coupled to the driving shaft 61. The driving shaft 61 is coupled to the driving shaft 61, And a swash plate 80 rotatably coupled to the sleeve 65 and coupled to the rotor 70 by a hinge to vary the inclination angle.

A hinge arm 75 for hinge coupling with the swash plate 80 is formed in the rotor 70. The hinge arm 75 has an elongated hinge slot 76 formed therein. On the other hand, a swash plate hub (81) protrudes from the swash plate (80). A swash plate arm 85 hinged by the hinge arm 75 and the hinge pin P is formed at the tip of the swash plate hub 81.

Referring to FIG. 2, a pressure relief valve 90 is installed on the outer side of the rear housing 30. A side wall 35 extending from the rear housing 30 and surrounding the pressure relief valve 90 is formed around the pressure relief valve 90. The pressure relief valve 90 serves to discharge the refrigerant to the outside of the compressor when an abnormal pressure is formed in the compressor.

Referring to FIG. 3, a thread 91 is formed at an outer lower side of the pressure relief valve 90 for engagement with the rear housing 30. A discharge port 95 is formed above the pressure relief valve 90. The refrigerant in the compressor is discharged to the outside through the discharge port (95).

Referring again to FIG. 1, when the driving shaft 61 receives power from a pulley 90 connected to an external power source, the rotor 70 rotates together with the driving shaft 61. When the rotor 70 is rotated, the swash plate 80 is rotated by the resilient pressing action of the pressure spring 67 and the return spring 69 coupled to the drive shaft 61 and the set pressure of the crank chamber 21, Reciprocates along the longitudinal direction of the drive shaft 61 and rotates while varying the inclination angle. The rotation of the swash plate 80 causes the piston 40 to reciprocate linearly in the cylinder bore 11. As the piston 40 reciprocates linearly, the refrigerant flowing into the cylinder bore 11 is compressed, and the compressed refrigerant is transferred to a condenser (not shown).

However, in the case of a compressor having the above configuration, the following problems arise.

When an abnormal pressure is generated inside the compressor, the pressure relief valve 90 discharges the refrigerant to the outside in order to lower the pressure inside the compressor. However, there is a case that the discharge direction of the refrigerant needs to be changed according to the demand of the consumer. In general, the pressure relief valve has a discharge port 95 on the upper side of the valve, and the discharge port 95 is fixed in position. Therefore, in order to change the discharge direction of the refrigerant, there arises a problem that it is necessary to change the molds of the front housing or the rear housing provided with the pressure relief valve. In order to change the mold of the housing, a lot of cost is incurred.

It is an object of the present invention to provide a compressor which can change the discharging direction of a refrigerant to a direction desired by a user in a pressure relief valve operation while minimizing cost consumption.

The compressor according to the present invention as described above comprises a housing constituting an outer appearance of the compressor, a compression mechanism provided in the housing for sucking and compressing the refrigerant, an outlet formed in the housing for discharging the refrigerant compressed in the compression mechanism, A pressure relief valve installed at one side of the housing and having a discharge port for sensing the pressure inside the discharge path and discharging the refrigerant to the outside when the pressure is higher than a predetermined pressure; A protrusion formed so as to protrude upward from a central portion of the body and a discharge portion formed at one side of the body and the protrusion; and a fixing means for fixing the change plate to the pressure relief valve, As a technical feature.

The change plate is preferably formed by press working.

Further, according to the embodiment of the fixing means, it is also possible to provide a mounting groove formed on the side where the discharge port is provided, an engaging groove formed on the inner side surface of the mounting groove, a snap ring inserted in the engaging groove, .

According to the compressor of the present invention, it is possible to easily change the outlet of the pressure relief valve in a desired direction by the customer while sharing the existing mold and at low cost.

And the discharge direction of the refrigerant can be adjusted irrespective of the direction in which the pressure relief valve is assembled.

1 is a sectional view showing the construction of a general variable capacity swash plate type compressor,
2 is a perspective view showing the construction of a general variable capacity swash plate type compressor,
3 is a perspective view showing the construction of a general pressure relief valve,
FIG. 4 is a sectional view showing the construction of a variable displacement swash plate type compressor according to the present invention,
5 is a perspective view showing a configuration of a pressure relief valve according to the present invention,
6 is a partial cross-sectional view showing the structure of a pressure relief valve according to the present invention,
7 is a plan view showing a configuration of a change plate according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a variable displacement swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 4 is a cross-sectional view showing the construction of a variable displacement swash plate type compressor according to the present invention, FIG. 5 is a perspective view showing the structure of a pressure relief valve according to the present invention, and FIG. And FIG. 7 is a plan view showing the configuration of a change plate according to the present invention.

4, the compressor 100 includes a cylinder block 110 in which a plurality of cylinder bores 111 are formed in a radial direction, and a crank chamber 121 coupled to the front of the cylinder block 110, And a rear housing 130 coupled to the rear of the cylinder block 110 to form a suction chamber 131 and a discharge chamber 133. The front housing 120 includes a front housing 120, The cylinder block 110 and the front and rear housings 120 and 130 are coupled by fastening bolts to form a housing of the compressor as a whole.

A piston 140 having a shape corresponding to the cylinder bore 111 is received in the cylinder bore 111. The piston 140 is linearly reciprocated to compress the refrigerant flowing into the cylinder bore 111.

A valve for controlling the flow of the refrigerant from the cylinder bore 111 to the discharge chamber 33 is provided between the cylinder block 110 and the rear housing 130, Assembly 113 is installed.

A front housing 120 is installed at one end of the cylinder block 110. The front housing 120 is coupled with the cylinder block 110 to form a crank chamber 121 therein. The crank chamber 121 is a space that is kept airtight with the outside. A pulley 125 is rotatably mounted on the front housing 120 on the opposite side of the cylinder block 110 in response to the driving force of the engine and an inner circumferential surface of the pulley 125 is connected to one end of the driving shaft 161 A hub (not shown) to be coupled is installed.

A rear housing 130 is installed at the other end of the cylinder block 110, that is, opposite to the front housing 120. A suction chamber 131 is formed in the rear housing 130 to selectively communicate with the cylinder bores 111. The suction chamber 131 is formed in a region of the rear housing 130 corresponding to the center of the surface facing the cylinder block 110. The suction chamber 131 serves to transfer the refrigerant to be compressed into the cylinder bore 111.

A discharge chamber 133 is formed in the rear housing 130. The discharge chamber 133 also communicates with the cylinder bore 111 selectively. The discharge chamber 133 is formed at a position adjacent to the edge of the rear housing 130 facing the cylinder block 110. The discharge chamber 133 is a space in which the refrigerant compressed by the cylinder bore 111 is discharged and temporarily stays. The refrigerant temporarily stored in the discharge chamber 133 is discharged to the outside of the compressor through a discharge port (not shown). The path through which the refrigerant compressed in the cylinder bore 111 flows out through the discharge chamber 133 through the discharge port is referred to as a discharge path. A control valve 136 is provided on one side of the rear housing 130 to adjust the angle of the swash plate 180 to be described later.

A drive shaft 161 is installed through the cylinder block 110 and the front housing 120. The driving shaft 161 is rotated by a driving force transmitted from the engine through the pulley 125. The driving shaft 161 is rotatably supported by the cylinder block 110 and the front housing 120.

A rotor 170 is installed in the crank chamber 121 so that the drive shaft 161 passes through the center and is integrally rotated with the drive shaft 161. The rotor 170 is fixed to the drive shaft 161 in a substantially disc shape.

The swash plate 180 is hingedly coupled to the rotor 170 to rotate together with the drive shaft 161. The swash plate 180 is installed on the driving shaft 161 so that the angle varies depending on the discharge capacity of the compressor. That is, the angle of the swash plate 180 is adjusted so as to be perpendicular to the longitudinal direction of the drive shaft 161 or inclined at a predetermined angle with respect to the drive shaft 161. The swash plate 180 has its edge connected to the pistons 140 through a shoe 144. That is, the edge of the swash plate 180 is connected to the connecting portion 142 of the piston 140 through the shoe 144, and the swash plate 180 is rotated by the rotation of the cylinder bore 111 of the piston 140, Let it reciprocate.

A valve assembly 113 for controlling the flow of the refrigerant between the suction chamber 131 and the discharge chamber 133 and the cylinder bore 111 is provided between the cylinder block 110 and the rear housing 130 do. The valve assembly 113 controls the flow of the refrigerant from the suction chamber 131 to the cylinder bore 111 and the flow of the refrigerant from the cylinder bore 111 to the discharge chamber 133.

A driving unit 160 for reciprocating the piston 140 is installed in the crank chamber 121. The driving unit 160 includes a driving shaft 161 installed to penetrate through the center of the front housing 120 and the cylinder block 110 and rotated by a driving force transmitted from an external power source, A rotor 170 coupled to the driving shaft 161 in the crank chamber 121 to rotate together with the driving shaft 161; a rotatable member 165 rotatably coupled to the sleeve 165; A swash plate 180 coupled to the rotor 170 by a hinge to vary the inclination angle of the swash plate 180, a pressing spring 167 for pressing the swash plate 180 to reduce the inclination angle of the swash plate 180, And a return spring 169 for urging the swash plate 180 so as to push the swash plate 180 inward.

A hinge arm 175 for hinge coupling with the swash plate 180 is formed in the rotor 170. A hinge slot 176 having a long hole shape is formed on the upper side of the hinge arm 175. A swash plate hub 181 is integrally coupled to the swash plate 180. A swash plate arm 185 hinged to the hinge arm 175 by a hinge pin P is formed in the swash plate hub 181 do.

When the drive shaft 161 receives power from a pulley 125 connected to an external power source and rotates, the rotor 170 rotates together with the drive shaft 161. When the rotor 170 rotates, the swash plate 180 is rotated together with the sleeve 165 by the set pressure of the crank chamber 121 and the resilient pressing action of the pressure spring 167 and the return spring 169, And at the same time the inclination angle is variable and rotates.

When the swash plate 180 rotates in an inclined state, the circumferential portion of the swash plate 180 reciprocates the pistons 140 as they pass between the shoe 144 interposed in the connecting portion 142 of the piston 140 .

Referring to FIG. 5, a pressure relief valve 190 is installed on one side of the rear housing 130 of the compressor. The pressure relief valve 190 is installed on the discharge path and selectively discharges the refrigerant according to the pressure level of the refrigerant in the compressor.

6 to 8, a discharge port 195 for discharging the refrigerant is formed in the upper head part 197 of the pressure relief valve 190, and the head part 197 is provided with an assembly The mounting groove 191 is formed concavely. On the side surface of the mounting groove 191, a coupling groove 196 for assembling a snap ring 157 to be described later is formed concavely.

A change plate 150 for changing the discharge direction of the refrigerant discharged from the discharge port is coupled to the mounting groove 191 of the pressure relief valve 190. The change plate 150 includes a body 151 formed in a plate shape, a protrusion 153 protruding upward from a central portion of the body 151, and a side of the body 151 and the protrusion 153, And a discharge unit 155 formed in the discharge space. The change plate 150 is generally manufactured using a pressing method.

A snap ring 157 is mounted in the coupling groove 196 formed in the inner side surface of the pressure relief valve 190. The snap ring 157 is formed in an annular shape with a part thereof being opened. At both side ends, an assembly hole 158 is formed for convenience of assembly. The snap ring 157 is attached to the coupling groove 196 and the upper side of the body 151 of the change plate 150 is pressed to fix the change plate 150 to the pressure relief valve 190.

Hereinafter, an assembling process of the pressure relief valve according to the present invention will be described.

The user uses the screw thread formed on the pressure relief valve 190 to couple the pressure relief valve 190 to one side of the compressor. The change plate 150 is mounted in the mounting groove 191 of the pressure relief valve 190. At this time, the user can determine the discharge direction of the refrigerant by rotating the direction of the discharge part 155 of the change plate 150 in a desired direction. Thereafter, the assembly hole 158 of the snap ring 157 is elastically deformed inward and inserted into the engagement groove 196. By assembling in this manner, the change plate 150 can be stably assembled to the pressure relief valve 190 and the discharge direction of the refrigerant can be changed to a direction desired by the user.

Hereinafter, the operation of the compressor according to the present invention will be described in detail.

When the driving force of the engine is transmitted to the pulley 125 through the belt, the pulley 125 rotates. When the pulley 125 rotates, a rotational force is transmitted to a hub installed on the inner circumferential surface of the pulley 125, so that the drive shaft 161 coupled to the hub rotates, and thus the compressor is driven.

Thus, as the drive shaft 161 rotates, the swash plate 180 rotates together with the drive shaft 161. When the driving shaft 161 rotates, the rotor 170 also rotates together. When the rotor 170 rotates, the set pressure of the crank chamber 121 and the resilient pressing action of the pressure spring 190 and the return spring 169 cause the swash plate 180 to move together with the sleeve 165 Reciprocates along the longitudinal direction and rotates while changing the inclination angle. When the swash plate 180 rotates in an inclined state, the circumferential region of the swash plate reciprocates the piston 140 as it passes between the shoe 144 interposed in the connecting portion 142 of the piston 140.

Accordingly, the refrigerant in the suction chamber 131 is sequentially sucked into the respective cylinder bores 111. After the refrigerant is delivered to the cylinder bore 111 and the piston 140 in the corresponding cylinder bore 111 moves toward the valve assembly 113, the refrigerant is compressed.

When the refrigerant is compressed in the cylinder bore 111, the pressure inside the cylinder bore 111 becomes relatively high, so that the refrigerant in the cylinder bore 111 flows through the valve assembly 113, (133). The refrigerant temporarily stored in the discharge chamber 133 is discharged to the outside of the compressor 100 through a discharge port (not shown). In this state, when the inclination angle of the swash plate 180 is varied by the control valve 136, the amount of the refrigerant compressed in the cylinder bore 111 varies, and thus the discharge amount of the refrigerant is varied.

When the pressure in the compressor 100 becomes abnormally high, the pressure relief valve 190 operates. The pressure relief valve 190 senses the pressure of the refrigerant discharged and operates only when the pressure of the refrigerant discharged is equal to or higher than a predetermined pressure. That is, when the pressure of the refrigerant to be discharged is equal to or lower than a predetermined pressure, the inlet port 192 is kept closed, but when the pressure of the refrigerant discharged is equal to or higher than the predetermined pressure, the inlet port 192 is opened, (190) and discharged to the discharge port (195). The refrigerant discharged from the discharge port of the pressure relief valve 190 hits the protrusion 153 of the change plate 150 coupled to the pressure relief valve 190 and is discharged to the outside through the discharge port 155.

According to the compressor having such a configuration, by changing the coupling position of the change plate 150 coupled to the pressure relief valve 190, the discharge direction of the refrigerant can be changed to a desired direction by the user.

Although the present invention has been described in connection with the variable displacement swash plate type compressor, the present invention is not limited thereto and may be applied to other types of compressors.

The scope of the present invention is defined by the appended claims rather than by the foregoing description, and various changes and modifications within the scope of the claims set forth in the claims can be made by those skilled in the art. It is self-evident.

110: cylinder block 111: cylinder bore
120: front housing 121: crank chamber
130: rear housing 131: suction chamber
133: Discharge chamber 136: Control valve
139: jet port 140: piston
161: drive shaft 167: pressure spring
169: return spring 170: rotor
180: Swash plate 150: Altered plate
190: Pressure relief valve

Claims

A housing constituting an appearance of the compressor;
A compression mechanism installed in the housing to suck and compress the refrigerant;
A discharge path formed in the housing to discharge the refrigerant compressed by the compression mechanism;
A pressure relief valve 190 installed at one side of the housing and having a discharge port 195 for discharging the refrigerant to the outside when the pressure inside the discharge path is higher than a predetermined pressure;
A body 151 attached to the pressure relief valve and coupled to the upper side of the discharge port 195, a protrusion 153 protruding upward from the center of the body 151, A change plate 150 having a discharge unit 155 formed by cutting one side of the protrusion 153; And
And fixing means for fixing the change plate (150) to the pressure relief valve,
Wherein,
A mounting groove 191 formed concavely on the side of the discharge port 195; An engaging groove 196 formed on an inner side surface of the mounting groove 191; And a snap ring (157) fitted in the coupling groove (196) and fixing the upper side of the body (151).

The method according to claim 1,
Wherein the change plate (150) is formed by press working.

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