KR101046095B1 - compressor - Google Patents

Abstract

The present invention relates to a compressor, by applying a suction rotary valve without a suction lead valve only on the rear side of a drive shaft without significantly changing the structure of a general swash plate type compressor, without causing an increase in manufacturing cost. An object of the present invention is to provide a compressor capable of exhibiting compression performance.

To this end, the present invention is the drive shaft coupled to the inclined swash plate rotating in the swash plate chamber in the compressor; A front and rear cylinder block in which the driving shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber; Front and rear housings coupled to both sides of the front and rear cylinder blocks; A plurality of pistons mounted on an outer circumference of the swash plate and reciprocating in the cylinder bore in conjunction with a rotational movement of the swash plate; A front valve unit interposed between the front cylinder block and the front housing, the valve plate having a plurality of refrigerant discharge holes and suction holes, and a discharge lead valve and a suction lead valve; A rear valve unit interposed between the rear cylinder block and the rear housing, the valve plate having a plurality of refrigerant discharge holes and a discharge lead valve; A refrigerant supply passage for supplying a refrigerant in the swash plate chamber to a refrigerant storage chamber formed in the rear housing; A coolant inlet path formed at a rear end of the drive shaft and supplying a coolant from the coolant storage chamber to the cylinder bore of the rear cylinder block; A suction passage formed in the rear cylinder block to sequentially suck the refrigerant sucked into the refrigerant inflow passage into each cylinder bore when the driving shaft rotates; .

Compressor, housing, drive shaft, inlet, dead space, bolt fastener, valve unit, suction lead valve

Description

Compressor

1 is a cross-sectional view showing a general compressor.

2 is a cross-sectional view taken along the line A-A in FIG.

3 is an exploded perspective view showing a compressor according to the present invention.

4 is a sectional view showing a compressor according to the present invention;

5 is a perspective view showing a state in which the drive shaft and the swash plate are assembled in the compressor according to the present invention.

Figure 6 is a front view showing the structure of the rear housing in the compressor according to the present invention.

Description of the Related Art [0002]

100: compressor 110: front housing

111: suction chamber 112, 121: discharge chamber
122: bulkhead

113,123: Bolted hole 114: Through hole

125a: space 126: communication means

120: rear housing 130: front cylinder block

131, 141: cylinder bore 142: suction passage

133, 143: shaft support hole 134: discharge passage

135,145: Muffler 136: Judge Room

140: rear cylinder block 146: suction port

147: discharge port 150: drive shaft

151: refrigerant inlet passage 160: swash plate

161: hub 165: shoe

170: piston 180: thrust bearing

190, 200: valve unit 211: transfer passage

The present invention relates to a compressor, and more particularly, by applying a suction rotary valve without a suction lead valve only on the rear side of a drive shaft without significantly changing the structure of a general swash plate type compressor, resulting in an increase in manufacturing cost. The present invention relates to a compressor capable of exhibiting optimal compression performance without this.

In general, a compressor for automobiles sucks refrigerant gas discharged after evaporation is completed from an evaporator, converts the refrigerant gas into a refrigerant gas in a high temperature and high pressure state that is easily liquefied, and discharges the refrigerant gas.

There are various kinds of such compressors, such as a swash plate type compressor in which a piston reciprocates by the rotation of an inclined swash plate, a scroll compressor compressed by a rotational motion of two scrolls, and a rotary compressor compressed by a rotary vane. .

Among these, the reciprocating compressor that compresses the refrigerant according to the reciprocating motion of the piston includes crank type and wobble plate type in addition to the swash plate type compressor, and the swash plate type compressor also has a fixed capacity swash plate type compressor and a variable capacity type according to the use. And swash plate compressors.

1 and 2 is a view showing a conventional fixed-capacity swash plate type compressor, briefly described with reference to the following.

As shown, the swash plate compressor 1 is coupled to the front housing 10, the front cylinder block 20 is built, the rear housing is coupled to the front housing 10 and the rear cylinder block 20a ( 10a).

Inside the front and rear housings 10 and 10a, the discharge chambers 12 and the suction chambers are respectively located inside and outside the partition 13 in correspondence with the discharge holes and the suction holes of the valve plate 61 to be described below. 11) is formed.

Here, the discharge chamber 12 is formed in the first discharge chamber 12a formed inside the partition 13, and formed outside the partition 13 so as to be partitioned from the suction chamber 11 and the first discharge chamber 12a. ) And a second discharge chamber 12b communicating through the discharge hole 12c.

That is, when the refrigerant in the first discharge chamber 12a passes through the discharge hole 12c having the small diameter, the refrigerant is reduced and enlarged when moving to the second discharge chamber 12b. The pulsation pressure drops to reduce vibration and noise.

On the other hand, a plurality of bolted fastening holes 16 are formed in the circumferential direction of the suction chamber 11. Through the bolt fastening hole 16, the front and rear housings 10 and 10a are fastened / fixed to the mutual bolts 80 in a state where a plurality of components are assembled therein.

The front and rear cylinder blocks 20 and 20a are provided with a plurality of cylinder bores 21 therein, and the cylinder bores 21 corresponding to each other of the front and rear cylinder blocks 20 and 20a are provided. The pistons 50 are coupled to the linear reciprocating motion as well as the pistons 50 are coupled to the outer circumference of the swash plate 40 inclined to the drive shaft 30 via the shoe 45.

Accordingly, the pistons 50 reciprocate inside the cylinder bore 21 of the front and rear cylinder blocks 20 and 20a in conjunction with the swash plate 40 rotating together with the drive shaft 30.

The valve unit 60 is installed between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a.

Here, the valve unit 60 is composed of a valve plate 61 having a suction hole and a discharge hole, and a suction lead valve 63 and a discharge lead valve 62 provided at both sides thereof.

The valve unit 60 is assembled between the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a, respectively, in which fixing pins are formed on both sides of the valve plate 61. 65 is assembled in a fixed position while being inserted into the fixing hole 15 formed on the opposite surface of the front and rear housings 10 and 10a and the front and rear cylinder blocks 20 and 20a.

On the other hand, the front and rear cylinder block 20 (20) (so that the refrigerant supplied to the swash plate chamber 24 provided between the front and rear cylinder blocks 20, 20a can flow to each suction chamber 11 ( A plurality of suction passages 22 are formed in 20a, and the second discharge chamber 12b of the front and rear housings 10 and 10a is formed through the front and rear cylinder blocks 20 and 20a. It is communicated with each other by the connecting passage 23.

Therefore, the suction and compression of the refrigerant may be simultaneously performed in the bore 21 of the front and rear cylinder blocks 20 and 20a according to the reciprocating motion of the piston 50.

In addition, a shaft support hole 25 is formed at the center of the front and rear cylinder blocks 20 and 20a to support the drive shaft 30, and a needle roller bearing 26 is formed in the shaft support hole 25. It interposes and supports the said drive shaft 30 rotatably.

On the other hand, the upper portion of the outer side of the rear housing (10a) is supplied with the refrigerant transferred from the evaporator during the intake stroke of the piston 50 into the compressor (1), during the compression stroke of the piston 50 inside the compressor (1) The muffler 70 is formed to discharge the compressed refrigerant in the condenser.

Referring to the refrigerant circulation process of the compressor (1) configured as described above are as follows.

The refrigerant supplied from the evaporator is sucked into the suction part of the muffler 70 and then supplied to the swash plate chamber 24 between the front and rear cylinder blocks 20 and 20a through the refrigerant suction port 71. The refrigerant supplied to 24 flows into the suction chamber 11 of the front and rear housings 10 and 10a along the suction passage 22 formed in the front and rear cylinder blocks 20 and 20a. .

Thereafter, when the piston 50 is in the suction stroke, the suction lead valve 63 is opened by moving the piston 50 from the top dead center to the bottom dead center, wherein the refrigerant in the suction chamber 11 is a valve plate. It is sucked into the cylinder bore 21 through the suction hole of.

In the compression stroke of the piston 50, the refrigerant inside the cylinder bore 21 is compressed by the piston 50 moving from the bottom dead center to the top dead center. At this time, the discharge lead valve 62 is opened. The refrigerant flows to the first discharge chamber 12a of the front and rear housings 10 and 10a through the discharge hole of the valve plate.

Subsequently, the refrigerant flowing into the first discharge chamber 12a is discharged to the discharge portion of the muffler 70 through the refrigerant discharge port 72 of the muffler 70 through the second discharge chamber 12b and then to the condenser. It will be fluid.

Meanwhile, the refrigerant compressed in the cylinder bore 21 of the front cylinder block 20 is discharged to the first discharge chamber 12a of the front housing 10 and then flows to the second discharge chamber 12b. Along the connecting passage 23 formed in the front and rear cylinder blocks 20 and 20a, the second discharge chamber 12b of the rear housing 10a flows to the refrigerant discharge port 72 together with the refrigerant therein. Through the discharge portion of the muffler 70 is discharged.

However, the above-described conventional compressor 1 has a loss due to the suction resistance caused by the complicated refrigerant passage inside, a loss due to the elastic resistance of the suction lead valve 63 when the valve unit 60 is opened and closed. There was a problem that the suction volume efficiency of the refrigerant is reduced.

On the other hand, a technique for reducing the loss caused by the elastic resistance of the suction lead valve 193 is disclosed in Korean Patent Publication No. 2003-47729 (name: lubrication structure in a fixed displacement piston compressor). That is, the above technique applies a suction shaft integrated suction rotary valve without a suction lead valve and allows the refrigerant to directly enter the cylinder bore from the rear of the driving shaft through the inside of the driving shaft in order to reduce the loss caused by the suction resistance. will be.

In the case of the compressors, oil is mixed in the refrigerant for lubrication of the driving unit (swash plate, shoe, piston, etc.) and the friction unit inside the compressor to circulate the air conditioning system.

In addition, in the domestic patent application No. 2005-74185 filed previously by the applicant of the present invention, the cylinder bore formed in the cylinder block the refrigerant sucked into the compressor inside the drive shaft in which the swash plate rotating in the swash plate chamber is inclined A suction rotary valve compressor having a structure in which a flow path is formed so as to move to and a space between an inlet and an outlet is formed on both sides of the flow path has been disclosed.

Here, the inlet of the flow passage is formed through one side of the hub and the drive shaft of the swash plate, or formed in opposite directions on both sides of the drive shaft. In the latter case, one inlet is formed at a position spaced apart from each other so as not to face the other inlet.

In addition, the outlet of the flow path is formed so as to communicate with the suction passage of each cylinder bore, the cylinder bore provided on both sides of the swash plate chamber during rotation of the drive shaft is formed on both sides of the drive shaft in opposite directions to each other at the same time so as to suck the refrigerant It is.

However, the suction rotary valve compressor eliminates the suction lead valve in the general compressor as shown in FIG. 1 and instead forms a refrigerant suction passage inside the drive shaft, which serves as the suction lead valve, thereby sucking the refrigerant suction resistance and the refrigerant suction. Although it is possible to reduce the size by improving the volumetric efficiency and simplifying the structure, the process of processing the inside of the drive shaft into a hollow structure is not only difficult, but also the processing cost is considerably high. In order to apply this as a suction rotary valve compressor, there is a problem in that a significant structural change is caused, leading to an increase in manufacturing cost.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the manufacturing cost by applying a suction rotary valve without a suction lead valve only on the rear side of the drive shaft without significantly changing the structure of a general swash plate type compressor. It is an object of the present invention to provide a compressor capable of exhibiting an optimum compression performance without causing an increase in.

The present invention for achieving the above object is a drive shaft coupled to the inclined swash plate to rotate in the swash plate chamber inside the compressor;

A front and rear cylinder block in which the driving shaft is rotatably installed in the shaft support hole and a plurality of cylinder bores are formed at both sides of the swash plate chamber;

Front and rear housings coupled to both sides of the front and rear cylinder blocks;

A plurality of pistons mounted on an outer circumference of the swash plate and reciprocating in the cylinder bore in conjunction with a rotational movement of the swash plate;

A front valve unit interposed between the front cylinder block and the front housing, the valve plate having a plurality of refrigerant discharge holes and suction holes, and a discharge lead valve and a suction lead valve;

A rear valve unit interposed between the rear cylinder block and the rear housing, the valve plate having a plurality of refrigerant discharge holes and a discharge lead valve;

A refrigerant supply passage for supplying a refrigerant in the swash plate chamber to a refrigerant storage chamber formed in the rear housing;

A coolant inlet path formed at a rear end of the drive shaft and supplying a coolant from the coolant storage chamber to the cylinder bore of the rear cylinder block;

A suction passage formed in the rear cylinder block to sequentially suck the refrigerant sucked into the refrigerant inflow passage into each cylinder bore when the driving shaft rotates; .

In the present invention, the refrigerant inlet passage is a groove formed on the outer circumferential surface in the radial direction of the drive shaft so as to communicate with the suction passage during the refrigerant suction stroke, the piston is moved from the top dead center to the bottom dead center.

In the present invention, the refrigerant supply passage is at least one communication means for communicating the space portion formed inside the rear housing and the refrigerant storage chamber, and at least one transfer passage for communicating the swash plate chamber and the space portion. It features.

Further, in the present invention, the transfer passage is characterized in that the gap between the inner peripheral surface of the bolt fastening hole and the outer peripheral surface of the bolt fastening of the rear cylinder block and the rear valve unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Repeated description of the same construction and operation as in the prior art will be omitted.

Figure 3 is an exploded perspective view showing a compressor according to the present invention, Figure 4 is a sectional view showing a compressor according to the present invention, Figure 5 is a perspective view showing a state in which the drive shaft and the swash plate assembled in the compressor according to the present invention, Figure 6 Is a front view showing the structure of the rear housing in the compressor according to the present invention.

The present invention applies a rotary suction valve structure having no suction lead valve to the structure of a general compressor as shown in FIG.

That is, the present invention has a structure of a general compressor having a suction lead valve constituting a valve unit, as shown in Figure 1, when divided into front and rear with respect to the center of the compressor, the rear is a suction lead valve Instead, it consists of a rotary suction valve compressor having a refrigerant inlet passage at the rear end of the drive shaft.

The present invention of such a structure can be applied to both a fixed displacement swash plate compressor and a variable displacement swash plate compressor, and the embodiment of the present invention will be described taking a fixed displacement swash plate compressor as an example.

Compressor according to the present invention, as shown in the drawing, the drive shaft 150 is coupled to the swash plate 160 to rotate in the swash plate chamber 136 inside the compressor 100, the drive shaft 150 is a shaft support hole ( 133, 143 is rotatably installed, and the front and rear cylinder blocks 130, 140 and a plurality of cylinder bores 131, 141 formed on both sides of the swash plate chamber 136, and the front and rear cylinders. The front and rear housings 110 and 120 coupled to both sides of the blocks 130 and 140 and the outer circumference of the swash plate 160 are mounted via a shoe 165 and interlocked with the rotational motion of the swash plate 160. And a plurality of pistons 170 reciprocating inside the cylinder bores 131 and 141 and between the front and rear cylinder blocks 130 and 140 and the front and rear housings 110 and 120, respectively. It is configured to include a front and rear valve unit 190, 200 interposed.

The suction chamber 111 and the discharge chamber 112 are provided in the front housing 110, and the discharge chamber 121 is provided in the rear housing 120. In addition, the front and rear housing 110, 120 is formed with a plurality of bolt fastening holes 113, 123 at the inner edge, the front and rear through the bolt fastening holes 113, 123. The housings 110 and 120 are fastened / fixed with the mutual bolts 300 in the state where the above components are assembled. Of course, the bolt fastening hole 138 (139) 148 (191d) (193d) (201c) so that the bolt 300 can pass through the front and rear cylinder blocks (130) 140 and the valve unit (190). ) Is formed.

Both sides of the drive shaft 150 are rotatably installed in the shaft support holes 133 and 143 of the front and rear cylinder blocks 130 and 140, and the front end portion is a central through hole of the front housing 110. It extends to penetrate 114 and engages with the electronic clutch (not shown).

The swash plate 160 is a plurality of pistons 170 coupled to the outer periphery of the piston 170 disposed in the opposite direction to each other in the cylinder bores 131, 141 of the front and rear cylinder blocks 130, 140 It is inclinedly coupled to the drive shaft 150 to perform the same suction or compression stroke while reciprocating.

In addition, since the swash plate 160 is moved forward and backward while the swash plate 160 is rotated in an inclined state while the compressor 100 is driven, the swash plate 160 flows from side to side due to an axial load so that the swash plate 160 is deformed. Or the driving shaft 150 may be deformed, and in order to prevent this, thrust bearings 180 are generally interposed between both ends of the swash plate 160 and the front and rear cylinder blocks 130 and 140, respectively. .

Meanwhile, as illustrated in FIG. 3, the front valve unit 190 includes a valve plate 191 and an intake lead valve 193 and a discharge lead valve 192 installed at both sides thereof. The suction lead valve 193 is installed on the surface facing the cylinder bore 131 of the front cylinder block 130, the discharge lead valve 192 is respectively installed on the surface facing the front housing 110.

The valve plate 191 is formed with a discharge hole (191a) in communication with the discharge chamber 121 of the front housing 110 on the inner peripheral side, and the suction chamber 111 of the front housing 110 on the outer peripheral side A suction hole 191b communicating with the cylinder bore 131 is formed, and may also be discharged to the discharge port 147 via the discharge bore 134 of the cylinder bore 131 and the front cylinder block 130. The communication path 191e communicating with the discharge chamber 121 and the discharge passage 134 is formed.

In addition, the suction lead valve 193 and the discharge lead valve 192 are provided with valve plates 193a and 192a for opening and closing the respective suction holes 191b and the discharge holes 191a.

In addition, the suction lead valve 193 has a discharge refrigerant through-hole 193c such that the refrigerant compressed from the cylinder bore 131 can be discharged to the discharge chamber 112 through the discharge hole 191a of the valve plate 191. Is formed, and a through passage 193e corresponding to the communication passage 191e of the valve plate 191 is formed.

In the valve unit 190, the fixing pin 191c formed in the valve plate 191 is inserted into the fixing holes 192b and 193b formed in the discharge lead valve 192 and the suction lead valve 193, respectively. Its position is fixed.

In addition, the rear valve unit 200 is a valve in which a plurality of discharge holes 201a are formed to communicate each cylinder bore 141 of the rear cylinder block 140 and the discharge chamber 121 of the rear housing 120. A plate 201 and a discharge lead valve 202 installed at one side of the valve plate 201 to open and close the discharge hole 201a.

The discharge lead valve 202 is installed in the discharge chamber 121 direction of the rear housing 120 on the basis of the valve plate 200 to discharge during compression stroke of the piston 170 similarly to the discharge lead valve 192. A valve plate 202a is provided that elastically deforms to open the ball 201a and to close the discharge hole 201a at the time of the suction stroke.

In addition, the refrigerant in the discharge chamber 121 of the rear housing 120 may be discharged to the valve plate 201 through the discharge passage (not shown) of the rear cylinder block 140 to the discharge port 147. The communication passage 201b is formed to communicate the discharge chamber 121 with the discharge passage.

The valve unit 200 has a fixed pin (not shown) provided on both sides of the valve plate 201 is inserted into the fixing hole 202a formed in the discharge lead valve 202, thereby fixing its position.

The suction port 146 communicates with the swash plate chamber 136 to supply external refrigerant to the swash plate chamber 136 on one outer surface of the front and rear cylinder blocks 130 and 140. Discharge ports 147 communicating with the discharge chambers 111 and 121 are formed to discharge the refrigerant in the discharge chambers 111 and 121 of the front and rear housings 110 and 120 to the outside.

Accordingly, the discharge passage 134 connecting the discharge chambers 111 and 121 and the discharge port 147 of the front and rear housings 110 and 120 to the front and rear cylinder blocks 130 and 140. At this time, the outer surface of the cylinder block 130, 140 is formed with a muffler 135, 145 to expand the discharge passage 134 to reduce the pulsation pressure of the discharge refrigerant to reduce the noise do.

Meanwhile, a cylinder bore 141 is formed on the outer circumferential surface of the rear end of the driving shaft 150 from the refrigerant storage chamber 124 formed in the rear housing 120 corresponding to the driving shaft 150 with the refrigerant sucked into the swash plate chamber 136 from outside the compressor. Refrigerant inflow passage 151 is formed so that it can move to.

In addition, the shaft support hole 143 in the rear cylinder block 140, so that the refrigerant introduced through the refrigerant inlet passage 151 can be sequentially sucked into each cylinder bore 141 during the rotation of the drive shaft 150. And a suction passage 142 communicating with each of the cylinder bores 141 is formed.

Here, the refrigerant inflow passage 151 is formed on the outer circumferential surface in the radial direction of the drive shaft 150 to communicate with the suction passage 142 when the piston 170 moves from the top dead center to the bottom dead center. It consists of a groove.

In addition, the inner circumferential surface and the bolt (1) of the bolt fastening holes 138, 139, 148, 191d, 193d, and 201c of the front and rear cylinder blocks 130 and 140 and the valve unit 190 and 200, respectively. A constant gap is formed between the outer circumferential surfaces of 300, as shown in Fig. 4. This gap sucks the refrigerant sucked from the swash plate chamber 136, as will be described later. It acts as a conveying passage 211 which communicates the swash plate chamber 136 and the space portion 125a in the rear housing 120 so as to be transferred to the cylinder bores 131 and 141. At least one can be formed.

In addition, in the discharge chamber 121 of the rear housing 120, as shown in FIG. 6, the partition wall 122 is formed along the circumference of the inner circumferential surface of the rear housing 120 and a predetermined space 125. It is.

The inner circumferential surface of the partition wall 122 formed as described above corresponds to a rear end portion of the driving shaft 150, and a refrigerant storage chamber, that is, a center space inside the boss 127 formed at the center of the rear housing 120, that is, a dead space. It is connected to the refrigerant storage chamber 124 by communication means 126 having a hole 126a to communicate with each other.

Only one communication means 126 may be formed between the partition wall 122 and the refrigerant storage chamber 124, or a plurality of communication means 126 may be formed at regular intervals therebetween. In particular, the portion of the partition wall 122 where the communication means 126 is located is bent to protrude toward the refrigerant storage chamber 124 so that the space portion 125a on the portion side is enlarged inwardly compared to the other space 125. As a result, the transfer passage 211 and the space portion 125a communicate with each other.

The communication means 126 and the transfer passage 211 serve as a refrigerant supply passage for supplying the refrigerant in the swash plate chamber 136 to the refrigerant storage chamber 124.

That is, by the communicating means 126, the refrigerant moving through the transfer passage 211 is transferred from the refrigerant storage chamber 124 to the refrigerant inflow passage 151 of the drive shaft 150 via the rear end of the drive shaft 150. As it is collected, it is inhaled.

As described above, in the compressor 100 according to the present invention, when the driving shaft 150 selectively receives power from an electronic clutch (not shown), the swash plate 160 rotates, and the swash plate ( The plurality of pistons 170 linked to the rotational movement of 160 repeats the action of sucking and compressing the refrigerant while reciprocating inside the cylinder bores 131 and 141 of the front and rear cylinder blocks 130 and 140. Will perform. At this time, when the piston 170 reciprocates to the cylinder bore 131 side of the front cylinder block 130, the same operation as the general compressor shown in Figure 1, the piston 170 is the cylinder bore of the rear cylinder block 140 When reciprocating to the side (141), the same operation as the compressor of the rotary suction valve.

That is, the operation of the compressor when the piston 170 reciprocates to the cylinder bore 131 side of the front cylinder block 130 is as follows.

First, the external refrigerant supplied from the evaporator is supplied into the swash plate chamber 136 through the suction port 146 and then the suction of the front housing 110 along the transfer passage 211 of the front cylinder block 130. It flows into the chamber 111.

Thereafter, when the suction stroke of the piston 170, the suction lead valve 193 of the valve unit 190 is opened, and the refrigerant in the suction chamber 111 is sucked into the cylinder bore 131.

In the compression stroke of the piston 170, the refrigerant introduced into the cylinder bore 131 is compressed and then discharged into the discharge chamber 112 of the front housing 110 as described above with reference to FIG. 1. It is discharged to the discharge port 147 through the discharge passage 134 and the muffler 135 of the front cylinder block 130, 140 is flowed to the condenser.

On the other hand, the operation of the compressor when the piston 170 reciprocates to the cylinder bore 141 side of the rear cylinder block 140 is as follows.

During the suction stroke of the piston 170, the refrigerant introduced into the swash plate chamber 136 through the suction port 146 passes through the transfer passage 211, the communication means 126, the refrigerant storage chamber 124, and the driving shaft ( Through the refrigerant inlet passage 151 of 150 is sequentially sucked directly into the cylinder bore (141).

In this state, during the compression stroke of the piston 170, the refrigerant sucked into the cylinder bores 131 and 141 is compressed by the piston 170 and then discharged to the discharge chamber 121 of the rear housing 120. The discharge port 147 is discharged through the discharge passage and the muffler 145 of the rear cylinder block 140.

As described above, the present invention provides a general swash plate compressor that is currently mass-produced by simply changing the structure of the rear and rear housings of the drive shaft without greatly changing the general compressor structure having the suction lead valve between the front housing and the front cylinder block. Suction rotary valve compressors can be applied.

According to the present invention described above, by applying a suction rotary valve without a suction lead valve only on the rear side of the drive shaft without significantly changing the structure of a general swash plate type compressor, the optimum compression without causing a rise in manufacturing cost There is an effect that it is possible to manufacture a compressor that can exhibit the performance.

Claims (4)

A drive shaft 150 to which the swash plate 160 rotating in the swash plate chamber 136 in the compressor is inclinedly coupled; The drive shaft 150 is rotatably installed in the shaft support hole (133, 143), and the front and rear cylinder block 130 formed with a plurality of cylinder bores (131, 141) on both sides of the swash plate chamber (136). 140; Front and rear housings 110 and 120 coupled to both sides of the front and rear cylinder blocks 130 and 140; A plurality of pistons (170) mounted on an outer circumference of the swash plate (160) via a shoe (165) and reciprocating in the cylinder bores (131, 141) in conjunction with a rotational movement of the swash plate (160); Interposed between the front cylinder block 130 and the front housing 110, the valve plate 191 and the discharge lead valve 192, the suction lead formed with a plurality of refrigerant discharge holes (191a) and the suction hole (191b) A front valve unit 190 composed of a valve 193; A rear valve unit 200 interposed between the rear cylinder block 140 and the rear housing 120 and including a valve plate 201 and a discharge lead valve 202 having a plurality of refrigerant discharge holes 201a formed therein; A refrigerant supply passage for supplying the refrigerant in the swash plate chamber 136 to the refrigerant storage chamber 124 formed in the rear housing 120; A coolant inlet passage 151 formed at a rear end of the drive shaft 150 and supplying a coolant to the cylinder bore 141 of the rear cylinder block 140 from the coolant storage chamber 124; A suction passage 142 formed in the rear cylinder block 140 to allow the refrigerant sucked into the refrigerant inlet passage 151 to be sequentially sucked into each cylinder bore 141 when the driving shaft 150 rotates; Compressor, characterized in that consisting of. The method of claim 1, The refrigerant inlet passage 151 is a groove formed on the outer circumferential surface in the radial direction of the drive shaft 150 to communicate with the suction passage 142 when the piston 170 moves from the top dead center to the bottom dead center. compressor). The method of claim 1, The refrigerant supply passage includes at least one communication means 126 for communicating the space portion 125a formed inside the rear housing 120 and the refrigerant storage chamber 124, the swash plate chamber 136, and the space. Compressor, characterized in that at least one transfer passage (211) for communicating the portion (125a). The method of claim 3, The conveying passage (211) is a compressor, characterized in that the gap between the inner circumferential surface of the bolt fastening hole and the outer circumferential surface of the bolt fastening of the rear cylinder block (140) and the rear valve unit (200).

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