KR20120090640A

KR20120090640A - Compressor

Info

Publication number: KR20120090640A
Application number: KR1020110011175A
Authority: KR
Inventors: 김재엽
Original assignee: 한라공조주식회사
Priority date: 2011-02-08
Filing date: 2011-02-08
Publication date: 2012-08-17
Also published as: KR101753403B1

Abstract

PURPOSE: A compressor is provided to control a discharge direction of refrigerants while users rotate a discharge unit of a variable plate in a desirable direction. CONSTITUTION: A compressor comprises a housing, a compressing unit, a discharge path, a pressure releasing valve(190), a variable plate(150), and a fixing unit. The compressing unit is installed inside the housing, and compresses and sucks refrigerants. The discharge path is formed in the housing, and discharges compressed refrigerants. The pressure releasing valve comprises an outlet. The discharge path discharges the refrigerants to the outside through the outlet if the internal pressure is more than predetermined pressure. The variable plate comprises a body(151), a projection(153), and a discharge unit(155). The body is installed in the pressure releasing valve, and connected to an upper part of the outlet. The projection is protruded on the center of the body. One side of the body and projection is cut, and the discharge unit is formed. The fixing unit fixes the variable plate to the pressure releasing valve.

Description

Compressor {Compressor}

The present invention relates to a compressor, and more particularly, to a compressor for variously setting the discharge direction of the refrigerant discharged from the pressure relief valve used to relieve the pressure in the compressor.

In general, an air conditioner for heating and cooling is installed in the vehicle. The air conditioner includes a compressor for compressing a low-temperature low-pressure refrigerant drawn from an evaporator into a high-temperature high-pressure refrigerant as a constitution of a cooling system and sending it to a condenser. In general, a swash plate type compressor is used for such a compressor.

The swash plate compressor is driven according to the on / off of the air conditioner switch installed on the front panel of the vehicle. When the compressor is driven, the temperature of the evaporator is lowered, and when the compressor is stopped, the temperature of the evaporator is increased.

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

Such swash plate type compressors include fixed displacement type and variable displacement type. In general, 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 increases, the inclination angle of the swash plate increases, and when the cooling load decreases, the inclination angle of the swash plate decreases. For reference, the inclination angle of the swash plate means the angle formed between the surface perpendicular to the drive shaft and the swash plate.

1 is a cross-sectional view showing the configuration of a general variable displacement swash plate compressor. As shown in the drawing, the variable displacement swash plate type compressor includes a cylinder block 10 having a plurality of cylinder bores 11 formed radially, and a crank chamber 21 coupled to the front of the cylinder block 10. Front housing 20 to form a, and the rear housing 30 is coupled to the rear of the cylinder block 10 to form the suction chamber 31 and the discharge chamber 33.

A piston 40 is accommodated in the cylinder bore 11, and the piston 40 is linearly reciprocated to compress the working fluid flowing into the cylinder bore 11. Inside the crank chamber 21, a drive unit 60 for reciprocating the piston 40 is installed. The drive unit 60 is coupled to the drive shaft 61 is coupled to the drive shaft 61, the sleeve 65 is coupled to the drive shaft 61 reciprocally sliding relative to the drive shaft 61, the drive shaft 61 is rotated by receiving power; Rotor 70 is rotated, it is rotatably coupled to the sleeve 65 is coupled to the rotor 70 and the hinge is configured to include a swash plate 80 is variable inclination angle.

The rotor 70 has a hinge arm 75 for hinge coupling with the swash plate 80. The hinge arm 75 is formed with a long slot-shaped hinge slot (76). Meanwhile, the swash plate hub 81 is formed to protrude from the swash plate 80. At the distal end of the swash plate hub 81 is formed a swash plate arm 85 which is hinged by the hinge arm 75 and the hinge pin (P).

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

Referring to FIG. 3, a thread 91 is formed at an outer lower end of the pressure relief valve 90 to be coupled to the rear housing 30. In addition, an outlet 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 drive shaft 61 is rotated by receiving power by a pulley 90 connected to an external power source, the rotor 70 also rotates together with the drive shaft 61. When the rotor 70 rotates, the swash plate 80 is sleeve 65 by the elastic pressing action of the pressing spring 67 and the return spring 69 coupled to the set pressure of the crank chamber 21 and the drive shaft 61. And reciprocate along the longitudinal direction of the drive shaft 61 and rotate while varying the inclination angle. Rotation of the swash plate 80 allows the piston 40 to linearly reciprocate in the cylinder bore 11. The piston 40 is a linear reciprocating motion to compress the refrigerant introduced into the cylinder bore 11, the compressed refrigerant is delivered to a condenser (not shown).

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

When abnormal pressure is generated inside the compressor, the refrigerant is discharged to the outside by the pressure relief valve 90 to reduce the pressure inside the compressor. However, there is a case in which it is necessary to change in the discharge direction of the refrigerant according to the demand of the consumer. In general, the pressure relief valve is provided with a discharge port 95 above the valve, and the position of the discharge port 95 is fixed. Accordingly, in order to change the discharge direction of the refrigerant, a problem arises in that the mold of the front housing or the rear housing in which the pressure relief valve is installed is changed. And in order to change the mold of the housing in this way, a lot of costs arise.

An object of the present invention is to provide a compressor that can change the discharge direction of the refrigerant in the desired direction during the operation of the pressure relief valve with a minimum cost.

The compressor according to the present invention as described above has a housing constituting the exterior of the compressor, a compressor mechanism portion provided in the housing to suck and compress the refrigerant, and a discharge formed in the housing and compressed by the compressor mechanism portion to be discharged. A pressure relief valve installed at one side of the path and the housing and having a discharge port for detecting a pressure inside the discharge path and discharging the refrigerant to the outside when the pressure is higher than a predetermined pressure, and installed at the pressure relief valve and coupled to an upper side of the discharge port. And a change plate having a body which is formed to protrude convexly upward from the center of the body, and a discharge part formed by cutting one side of the body and the protrusion, and fixing means for fixing the change plate to the pressure relief valve. It includes a technical feature to include.

And it is preferable that the said change board is formed by press work.

In addition, according to the embodiment of the fixing means, the mounting groove formed in the concave side is provided with the discharge port, the coupling groove formed on the inner side of the mounting groove, the snap ring is fitted to the coupling groove, and fixed to the upper side of the body It is preferable to include.

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

And the discharge direction of the refrigerant can be adjusted regardless of the assembly direction of the pressure relief valve.

1 is a cross-sectional view showing the configuration of a typical variable displacement swash plate compressor,
Figure 2 is a perspective view showing the configuration of a typical variable displacement swash plate compressor,
Figure 3 is a perspective view showing the configuration of a general pressure relief valve,
4 is a cross-sectional view showing the configuration of a variable displacement swash plate compressor according to the present invention;
5 is a perspective view showing the configuration of a pressure relief valve according to the present invention;
Figure 6 is a partial cross-sectional view showing the configuration of the 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.

Hereinafter, a preferred embodiment of a variable displacement swash plate compressor according to the present invention will be described in detail with reference to the accompanying drawings. Figure 4 is a cross-sectional view showing the configuration of a variable displacement swash plate compressor according to the present invention, Figure 5 is a perspective view showing the configuration of the pressure relief valve according to the present invention, Figure 6 is a configuration of the pressure relief valve according to the present invention 7 is a partial cross-sectional view shown, and FIG. 7 is a plan view showing the configuration of a change plate according to the present invention.

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

The cylinder bore 111 accommodates a piston 140 having a shape corresponding to the cylinder bore 111. The piston 140 is a linear reciprocating motion to compress the refrigerant flowing into the cylinder bore (111).

And a valve for controlling the flow of the refrigerant from the suction chamber 131 to the cylinder bore 111, the cylinder bore 111 to the discharge chamber 33 between the cylinder block 110 and the rear housing 130. The assembly 113 is installed.

The front housing 120 is installed at one end of the cylinder block 110. The front housing 120 is coupled to the cylinder block 110 to form a crank chamber 121 therein. The crank chamber 121 is a space in which the outside and airtightness are maintained. In addition, the front housing 120 is rotatably installed on the opposite side of the cylinder block 110 to receive the driving force of the engine rotatable, one end of the drive shaft 161 on the inner peripheral surface of the pulley 125 A hub (not shown) to be coupled is installed.

The other end of the cylinder block 110, that is, the rear housing 130 is installed on the opposite side where the front housing 120 is installed. The rear housing 130 is formed with a suction chamber 131 to selectively communicate with the cylinder bore (111). The suction chamber 131 is formed in an area corresponding to the center of the surface facing the cylinder block 110 of the rear housing 130. The suction chamber 131 serves to deliver a refrigerant to be compressed into the cylinder bore 111.

In addition, a discharge chamber 133 is formed in the rear housing 130. The discharge chamber 133 also selectively communicates with the cylinder bore 111. The discharge chamber 133 is formed at a position adjacent to an edge of a surface of the rear housing 130 that faces the cylinder block 110. The discharge chamber 133 is a space in which the refrigerant compressed in 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). A path through which the refrigerant compressed by the cylinder bore 111 is discharged to the outside through the discharge port through the discharge chamber 133 is called a discharge path. And one side of the rear housing 130 is provided with a control valve 135 to adjust the angle of the swash plate 180 to be described later.

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

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

The swash plate 180 is hinged to the rotor 170 and installed on the drive shaft 161 so as to rotate together. The swash plate 180 is installed on the drive shaft 161 so that the angle is variable according to the discharge capacity of the compressor. That is, the angle of the swash plate 180 is adjusted so as to be in a state 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 an edge thereof connected to the pistons 140 and the 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 thus the straight line is formed in the cylinder bore 111 of the piston 140 by the rotation of the swash plate 180. Reciprocate.

Meanwhile, a valve assembly 113 is provided between the cylinder block 110 and the rear housing 130 to control the flow of refrigerant between the suction chamber 131 and the discharge chamber 133 and the cylinder bore 111. 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.

The drive unit 160 for reciprocating the piston 140 is installed in the crank chamber 121. The drive unit 160 is installed through the center of the front housing 120 and the cylinder block 110, and the drive shaft 161 is rotated by a driving force transmitted from an external power source, and the drive shaft 161 The sleeve 165 coupled to the reciprocating sliding, the rotor 170 coupled to the drive shaft 161 in the crank chamber 121 and rotates together with the drive shaft 161 to be rotatable to the sleeve 165 Coupled to the rotor 170 and the hinge is coupled to the swash plate 180 is variable inclination angle, the pressing spring 167 for pressing the swash plate 180 to reduce the inclination angle of the swash plate 180, and the inclination angle of the swash plate is increased It is configured to include a return spring (169) for pressing the swash plate 180 to.

The rotor 170 has a hinge arm 175 for hinge coupling with the swash plate 180. An upper slot-shaped hinge slot 176 is formed on the hinge arm 175. Meanwhile, the swash plate hub 181 is integrally coupled to the swash plate 180, and the swash plate hub 181 is formed with the swash plate arm 185 hinged by the hinge arm 175 and the hinge pin P. do.

When the drive shaft 161 is rotated by receiving power from the pulley 125 connected to the external power source, the rotor 170 also rotates with the drive shaft 161. When the rotor 170 rotates, the swash plate 180 and the sleeve 165 together with the driving shaft 161 by the set pressure of the crank chamber 121 and the elastic pressing action of the pressing spring 167 and the return spring 169. It rotates while reciprocating along the longitudinal direction of the inclination angle is variable.

When the swash plate 180 rotates in an inclined state, the circumferential portion of the swash plate 180 reciprocates the pistons 140 as it passes between the shoes 144 interposed between the connecting portions 142 of the piston 140. Will be moved.

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

6 to 8, the upper head portion 197 of the pressure relief valve 190 is provided with a discharge port 195 for discharging the refrigerant, and the head portion 197 is assembled with a change plate to be described later. The mounting groove 191 for the recess is formed. The side of the mounting groove 191 is formed with a concave coupling groove 195 for the assembly of the snap ring 157 to be described later.

The mounting groove 191 of the pressure relief valve 190 is coupled to the change plate 150 for changing the discharge direction of the refrigerant discharged from the outlet. The change plate 150 has a plate-shaped body 151, a protrusion 153 protruding upward from the center of the body 151, and one side of the body 151 and the protrusion 153 is cut out. It is configured to include a discharge portion 155 is formed. The change plate 150 is generally manufactured using a press working method.

Snap ring 157 is mounted to the coupling groove 195 formed in the inner side of the pressure relief valve 190. The snap ring 157 is part of an open ring shape, the assembly hole 158 for convenience of assembly is formed at both ends. The snap ring 157 is mounted to the coupling groove 195 and presses the upper side of the body 151 of the change plate 150 to fix the change plate 150 to the pressure relief valve 90.

Hereinafter will be described the assembly process of the pressure relief valve according to the present invention having the configuration as described above.

The user is coupled to the pressure relief valve 190 to one side of the compressor by using a screw thread formed in the pressure relief valve 190. 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 unit 155 of the change plate 150 in the direction desired. Thereafter, the assembling hole 158 of the snap ring 157 is elastically deformed inward to fit into the coupling groove 195. By assembling as described above, the change plate 150 is 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 having the configuration as described above will be described in detail.

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

As such, as the drive shaft 161 rotates, the swash plate 180 rotates together with the drive shaft 161. When the drive shaft 161 rotates, the rotor 170 also rotates together. When the rotor 170 rotates, the swash plate 180 with the sleeve 165 of the drive shaft 161 by the set pressure of the crank chamber 121 and the elastic pressing action of the pressing spring 190 and the return spring 195. It rotates while reciprocating along the longitudinal direction while changing the inclination angle. When the swash plate 180 rotates in the inclined state, the circumferential region of the swash plate reciprocates the piston 140 as it passes between the shoes 144 interposed between the connecting portions 142 of the piston 140.

Accordingly, the refrigerant in the suction chamber 131 is sequentially sucked into each cylinder bore 111. As described above, after the refrigerant is delivered to the cylinder bore 111, the piston 140 in the corresponding cylinder bore 111 moves toward the valve assembly 113 to compress the refrigerant.

As such, when the refrigerant is compressed in the cylinder bore 111, the pressure inside the cylinder bore 111 becomes relatively high such that the refrigerant in the cylinder bore 111 is discharged through the valve assembly 113. 133 is passed to. 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 such a state, when the inclination angle of the swash plate 180 is changed by the control valve 135, since the amount of refrigerant compressed in the cylinder bore 111 is variable, the discharge amount of the refrigerant is variable.

When the pressure in the compressor 100 becomes abnormally high, the pressure relief valve 190 operates. The pressure relief valve 190 detects the pressure of the discharged refrigerant and operates only when the pressure of the discharged refrigerant is greater than or equal to a predetermined pressure. That is, when the pressure of the discharged refrigerant is lower than the predetermined pressure, the inlet 192 is kept closed, but when the pressure of the discharged refrigerant is higher than the predetermined pressure, the inlet 192 is opened and the refrigerant inside the compressor is the pressure relief valve. It is introduced through the inlet 192 of the 190 and discharged to the outlet 195. The refrigerant discharged from the outlet 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 part 155.

According to the compressor having such a configuration, by changing the coupling position of the change plate 150 coupled to the upper side of the pressure relief valve 190, it is possible to change the discharge direction of the refrigerant to the desired direction.

Although the above description has been made with an example that the present invention is applied to a variable displacement swash plate compressor, the present invention is not necessarily limited thereto, and may be applied to other types of compressors.

The scope of the present invention is not limited to the embodiments described above, but is defined by the claims, and various modifications and variations can be made by those skilled in the art within the scope of the claims. It is self-evident.

110: cylinder block 111: cylinder bore
120: front housing 121: crankcase
130: rear housing 131: suction chamber
133: discharge chamber 135: blind wall
139: jet 140: piston
161: drive shaft 167: pressure spring
169: Return spring 170: Rotor
180: swash plate 150: modified version
190: pressure relief valve

Claims

A housing constituting the exterior of the compressor;
A compression mechanism unit installed in the housing to suck and compress the refrigerant;
A discharge path formed in the housing to discharge the refrigerant compressed in the compression mechanism unit;
A pressure relief valve (190) installed at one side of the housing and having a discharge port (195) for detecting a pressure inside the discharge path and discharging the refrigerant to the outside when the pressure is higher than a predetermined pressure;
A body 151 installed at the pressure relief valve and coupled to an upper side of the outlet 195, a protrusion 153 protruding convexly upward from the center of the body 151, and the body 151. A change plate 150 having a discharge part 155 formed by cutting one side of the protrusion 153; And
Compressor comprising a fixing means for fixing the change plate 150 to the pressure relief valve.

The method of claim 1,
Compressor, characterized in that the change plate 150 is formed by press working.

The method of claim 1, wherein the fixing means,
A mounting groove 191 formed concave on the side where the outlet 195 is provided;
A coupling groove 195 formed at an inner side surface of the mounting groove 191;
And a snap ring (157) fitted in the coupling groove (195) to fix the upper side of the body (151).