KR101001575B1 - swash plate type compressor with rotary valve - Google Patents

Abstract

The present invention relates to a swash plate type compressor equipped with a rotary valve capable of reducing the flow loss of refrigerant flowing into the cylinder bore by improving the structure of the communication hole formed in the cylinder bore. The housing and the plurality of cylinder bores and the communication hole are provided. And a cylinder block coupled to the housing, a piston reciprocally received in the cylinder bore, a drive shaft rotatably installed with respect to the housing and the cylinder block, and rotated by the drive shaft and interlocked with the piston. A swash plate type compressor including a swash plate which is installed so as to be provided, a valve plate interposed between the housing and the cylinder block, and a rotary valve which is formed to rotate together with the drive shaft and is freely slid in the inner surface of the coupling hole formed in the cylinder block. In the communication hole has a suction port and the discharge port, Sphere outlet has the advantage that it can minimize the suction resistance of the refrigerant from the refrigerant discharge opening in communication with the discharge hole by the rotational centrifugal force of the rotary valve, so is characterized in that the drive shaft is spaced circumferentially.

Rotary valve, swash plate compressor, cylinder block, communication hole

Description

Swash plate type compressor with rotary valve

The present invention relates to a swash plate compressor equipped with a rotary valve, and more particularly, to a swash plate compressor equipped with a rotary valve capable of reducing the flow loss of refrigerant flowing into the cylinder bore by improving the structure of the communication hole formed in the cylinder bore. It is about.

In general, a vehicle air conditioner is a device that maintains a temperature inside a car lower than an external temperature by using a refrigerant, and includes a compressor, a condenser, and an evaporator to configure a circulation cycle of the refrigerant.

The compressor is a device that compresses and pumps refrigerant, and is driven by engine power or a motor.

In the swash plate type compressor, which is a kind of reciprocating compressor, a disc shaped swash plate is installed on a drive shaft to which engine power is transmitted in a state in which the inclination angle is variable or fixed to the rotation of the drive shaft, and the circumference of the swash plate is rotated by the rotation of the swash plate. A plurality of pistons installed through the shoe (shoe) along the configuration is configured to suck and compress the refrigerant gas by linear reciprocating motion inside the plurality of cylinder bores formed in the cylinder block.

In addition, in the process of inhaling, compressing, and discharging the refrigerant gas, a valve plate is disposed between the housing and the cylinder block to control the suction and discharge of the refrigerant gas.

Specifically, with reference to Figure 1 will be described in more detail the configuration of a conventional swash plate compressor.

As shown, the front housing (A10) is built in the front cylinder block (A20), the rear housing (A10a) is coupled to the front housing (A10) and built in the rear cylinder block (A20a), and the front and rear A plurality of pistons A50 reciprocating in the plurality of cylinder bores A21 formed in the cylinder blocks A20 and A20a, respectively, and a shoe A45 inclinedly coupled to the drive shaft A30 and installed on an outer circumference thereof. Valve plate (A60) installed between the swash plate (A40) and the front and rear housings (A10) (A10a) and the front and rear cylinder blocks (A20) (A20a) to be coupled to the piston (A50) via a). And an upper portion of the rear surface of the rear housing A10a to supply the refrigerant transferred from the evaporator during the suction stroke of the piston A50 into the compressor A1 and to compress the piston A50 during the compression stroke of the piston A50. ) Is composed of a muffler (A70) to discharge the refrigerant compressed inside the condenser .

A coolant discharge chamber A12 and a coolant suction chamber A11 are formed inside and outside the partition A13 in the front and rear housings A10 and A10a, respectively. Here, the refrigerant discharge chamber (A12) is formed in the first discharge chamber (A12a) formed inside the partition (A13), the outer side of the partition (A13) and partitioned from the refrigerant suction chamber (A11), the first discharge chamber It consists of the 2nd discharge chamber A12b which communicates with A12a and the discharge hole A12c. Accordingly, the refrigerant in the first discharge chamber A12a passes through the small diameter discharge hole A12c and moves to the second discharge chamber A12b. As a result, the pulsation pressure due to the periodic suction of the refrigerant is attenuated. This can reduce vibration and noise.

On the other hand, the front and rear cylinder block (A20) so that the refrigerant supplied to the swash plate chamber (A24) provided between the front and rear cylinder blocks (A20, A20a) can flow to each of the refrigerant suction chamber (A11). A plurality of suction passages A22 are formed in A20a, and the second discharge chamber A12b of the front and rear housings A10 and A10a passes through the front and rear cylinder blocks A20 and A20a. It communicates with each other by the formed connection path A23. Therefore, the suction and compression of the refrigerant may be simultaneously performed in the bore A21 of the front and rear cylinder blocks A20 and A20a according to the reciprocating motion of the piston A50.

The conventional swash plate compressor configured as described above compresses the refrigerant through the following process.

The refrigerant supplied from the evaporator is sucked into the suction part of the muffler A70 and then supplied to the swash plate chamber A24 between the front and rear cylinder blocks A20 and A20a through the refrigerant suction port A71, and the swash plate chamber The refrigerant supplied to A24 flows into the refrigerant suction chamber A11 of the front and rear housings A10 and A10a along the suction passage A22 formed in the front and rear cylinder blocks A20 and A20a. do.

Thereafter, the suction lead valve is opened during the suction stroke of the piston A50, and the refrigerant in the refrigerant suction chamber A11 is sucked into the cylinder A21 through the refrigerant suction hole of the valve plate A60. do. When the piston A50 is compressed, the refrigerant inside the cylinder bore A21 is compressed, and the discharge lead valve is opened, and the refrigerant flows through the refrigerant discharge hole of the valve plate A60. A10a flows to the first discharge chamber A12a. The refrigerant flowing into the first discharge chamber A12a is discharged to the discharge portion of the muffler A70 through the refrigerant discharge port A72 of the muffler A70 via the second discharge chamber A12b and then flows to the condenser. .

Meanwhile, the refrigerant compressed in the cylinder bore A21 of the front cylinder block A20 is discharged to the first discharge chamber A12a of the front housing A10 and then flows to the second discharge chamber A12b. Along the connection passage A23 formed in the front and rear cylinder blocks A20 and A20a, the second discharge chamber A12b of the rear housing A10a flows to the refrigerant discharge port A72 together with the refrigerant therein. Through the discharge portion of the muffler A70 is discharged.

However, in the conventional compressor A1, the suction of the refrigerant is caused by a loss due to a suction resistance caused by a complicated internal refrigerant flow path and a loss due to elastic resistance of the suction lead valve during opening and closing of the valve plate A60. There was a problem that the volumetric efficiency is reduced.

Meanwhile, Korean Patent Publication No. 2007-19564 (compressor, hereinafter referred to as 'prior art') discloses a technique for reducing the loss caused by the elastic resistance of the suction lead valve.

The prior art relates to a compressor employing a suction shaft integrated with a drive shaft without a suction lead valve, so that the refrigerant can directly enter the cylinder bore through the inside of the drive shaft in order to reduce the loss caused by the suction resistance. It is.

Specifically, as shown in FIG. 2, the swash plate B160 is inclinedly coupled and a flow path B151 through which a refrigerant flows is formed, and the swash plate B160 is coupled to the flow plate B151 on the side of the swash plate hub. One or more suction ports B152 are formed in communication with each other, and a drive shaft B150 having a refrigerant discharge port B153 formed at a position spaced apart from the suction port B152, and the drive shaft B150 are rotatably installed, and the swash plate chamber B136. A plurality of cylinder bores B131 and B141 are provided at both sides, and the refrigerant sucked into the flow path B151 of the drive shaft B150 sequentially rotates each cylinder bore B131 and B141 when the drive shaft B150 rotates. Front and rear cylinder blocks (B130) (B140) formed with communication holes (B132) (B142) for communicating the coupling holes (B133) (B143) and each cylinder bore (B131) (B141) to be sucked into the; The cylinder bore (B131) (B1) mounted on the outer circumference of the swash plate (B160) via a shoe and linked with the rotational movement of the swash plate (B160). 41 is configured to include a plurality of pistons (B170) for reciprocating in the inside, and the front and rear housings (B110) (B120) coupled to both sides of the cylinder block (B130) (B140) and the discharge chamber is formed therein, respectively. A compressor is disclosed.

According to the conventional compressor, the refrigerant introduced through the suction port (not shown) flows into the drive shaft B150 through the suction port B152 formed on the hub side of the swash plate B160, and then the drive shaft B150. It is configured to flow into the cylinder bores B131 and B141 via the flow path B151 formed in the interior thereof.

In addition, as shown in Fig. 3, when the compressor is viewed from the cross section, the communication holes (B132) and (B142) correspond to the inner peripheral surfaces of the cylinder blocks (B130, B140) and the coupling holes (B133) and (B143). It is formed in the vertical direction.

Accordingly, there is a disadvantage that the refrigerant discharged from the refrigerant discharge port B153 of the rotary valve does not pass smoothly through the communication holes B132 and B142.

In addition, when the drive shaft rotates at a high speed, the above phenomenon is further intensified, and the refrigerant to be introduced into the suction passage is sharply reduced, which greatly reduces the compression efficiency.

The present invention has been made to solve the above problems, an object of the present invention is to improve the volumetric efficiency by smoothly inhaling the refrigerant discharged from the refrigerant discharge port of the rotary valve with a cylinder bore with the rotation of the drive shaft. It is to provide a swash plate compressor equipped with a rotary valve.

In order to achieve the above object, a swash plate type compressor equipped with a rotary valve according to the present invention includes a housing, a plurality of cylinder bores and communication holes formed therein, coupled to the housing, and a reciprocating motion of the cylinder bores, respectively. A piston accommodated therein, a drive shaft rotatably installed with respect to the housing and the cylinder block, a swash plate rotated by the drive shaft and interlocked with the piston, a valve plate interposed between the housing and the cylinder block; In the swash plate type compressor including a rotary valve formed to rotate together with the drive shaft, the sliding valve is freely installed on the inner surface of the coupling hole formed in the cylinder block,

The communication hole has an inlet and an outlet,

The inlet and outlet are characterized in that spaced apart in the circumferential direction of the drive shaft.

In particular, the inner wall surface of the communication hole is characterized in that inclined in a straight line or curve.

In addition, the cross-sectional area of the inlet and outlet of the communication hole is characterized in that it is formed different.

And, the rotary valve is characterized in that it is detachably coupled to the drive shaft.

According to the present invention having the above-described configuration, the communication hole is directly in communication with the cylinder bore is formed to be inclined in the rotation direction of the rotary valve, thereby reducing the suction resistance of the refrigerant discharged from the refrigerant discharge port to the communication hole by the rotary centrifugal force of the rotary valve. The advantage is that it can be minimized.

In addition, according to the present invention it is possible to supply a larger amount of refrigerant than the prior art with respect to the rotational speed of the same drive shaft is to greatly improve the volumetric efficiency of the compressor.

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

Prior to the description, the swash plate compressor 1000 equipped with a rotary valve according to the present invention is applied to an embodiment of a double headed piston compressor, but is not necessarily limited to a double headed piston compressor.

As shown in FIGS. 4 to 7, the swash plate compressor 1000 equipped with the rotary valve according to the present invention includes a cylinder block 100 having a plurality of cylinder bores 110 and a communication hole 130, and Pistons 200 which are accommodated in the cylinder bore 110 of the cylinder block 100 so as to be reciprocated, respectively, and the front and rear housings 310 and 320 are hermetically coupled to the front and rear of the cylinder block 100, respectively. , The drive shaft 400 rotatably installed with respect to the front housing 310 and the cylinder block 100, the swash plate 500 interlocked with the drive shaft 400 and the piston 200, and the cylinder block ( 100 and the valve plate 600 interposed between the front and rear housings 310 and 320 and the driving shaft 400 to rotate together with the inner surface of the coupling hole 120 formed in the cylinder block 100. The rotary valve is configured to include a rotary valve (R) freely installed.

Since the configuration is the same as the prior art of FIG. 1 and FIG. 2 described above, description of the overlapping configuration will be omitted, and only the configuration having a difference will be described.

In addition, in the drawing, the refrigerant supplied from the evaporator (not shown) flows into the swash plate chamber 101 in the cylinder block 100, and the refrigerant passes through the cylinder block 100 again, and the refrigerant storage chamber P1 and the rotary valve ( R) is introduced into the cylinder bore 110, but not necessarily limited thereto, the rotary valve R is supplied directly from the front housing 310 and the rear housing 320 to the refrigerant storage chamber P1. Of course, it may be adopted that the structure flowing into the cylinder bore (110).

First, as shown in FIGS. 4 and 5, the cylinder block 100 is interposed between the front and rear housings 310 and 320, and a plurality of cylinder bores 110 in which the piston 200 reciprocates. ) Is formed.

The coupling block 120 is formed in the cylinder block 100, and the rotary valve R is freely slid in the coupling hole 120.

Here, the rotary valve (R) is preferably formed integrally by processing the outer diameter of both sides of the drive shaft 400, the rotary valve (R) is made of a separate component, as shown in Figure 6 and the drive shaft It is also possible to employ a structure that couples to 400.

Subsequently, a communication hole 130 for supplying refrigerant to each of the plurality of cylinder bores 110 is formed on the inner circumferential surface of the coupling hole 120 facing the outer circumferential surface of the rotary valve R.

In addition, the cylinder block 100 has a refrigerant suction hole 140 communicating with the refrigerant storage chamber P1 of the front and rear housings 310 and 320 from the swash plate chamber 101. In the drawing, a plurality of refrigerant suction holes 140 may be formed, but may be formed singly.

In addition, as the drive shaft 400 rotates on the outer circumferential surface of the rotary valve R, a refrigerant discharge port R1 is formed to communicate with the communication hole 130 of the cylinder bore 110 to discharge the sucked refrigerant. do.

As shown in FIG. 5, the refrigerant discharge port R1 of the rotary valve may be concave to a predetermined depth toward the inner center of the drive shaft 400.

Alternatively, as shown in FIG. 6, a separate rotary valve having a refrigerant discharge port may be coupled to the drive shaft 400.

In addition, the refrigerant may be supplied from the swash plate chamber 101 to the rotary valve or directly from the housing to the rotary valve.

That is, the rotary valve and the peripheral configuration may be adopted a configuration generally known, and the suction path can also be set in various ways.

Hereinafter, the communication hole 130 which is a characteristic component of the present invention will be described in detail.

As shown in FIG. 5 and FIG. 7, the communication hole 130 sucks the refrigerant discharged from the refrigerant discharge port R1 of the rotary valve R as the drive shaft 400 rotates when viewed in the direction of the drive shaft. And a discharge port 132 for discharging the refrigerant introduced through the suction port 131 to the cylinder bore 110, wherein the line connecting the suction port 131 and the discharge port 132 is It is not on the same line as the line connecting the center of the cylinder bore 110 and the center of the coupling hole.

Specifically, the communication hole 130 has a suction port 131 and the discharge port 132, the suction port and the discharge port is spaced apart in the circumferential direction of the drive shaft 400, the refrigerant discharged by the rotary centrifugal force hit the inner wall surface Since the suction resistance generated can be greatly reduced, the refrigerant can be more smoothly supplied into the cylinder bore 110.

In particular, as shown in the figure, the inner wall surface of the inclined communication hole 130, when viewed from the front, is preferably connected in the form of a straight line, it can be formed in the form of a curve having a variety of inclination angles, of course to be.

In addition, the cross-sectional area of the inlet 131 and the outlet 132 of the communication hole 130 may be formed differently.

This is to minimize the loss of the refrigerant discharged from the refrigerant discharge port R1 of the rotary valve R to the outside so as to efficiently increase the suction amount of the refrigerant.

As viewed from the driving shaft direction, the communication hole 130 communicating with the cylinder bore 110 has a shape inclined in the direction in which the rotary valve R rotates, and thus is discharged to the rotary centrifugal force of the rotary valve R. The refrigerant to be naturally passed through the inlet 131 and the outlet 132 can be supplied into the cylinder bore (110).

Therefore, since a larger amount of refrigerant can be supplied to the same rotational force of the conventional rotary valve R, the volumetric efficiency of the compressor is greatly increased because the rotational speed of the drive shaft 400 is not excessively increased to increase the suction amount of the refrigerant. It can be improved.

1 is a front sectional view and a side sectional view showing the configuration of a conventional swash plate type compressor.

Figure 2 is a longitudinal sectional view showing a swash plate compressor equipped with a rotary valve according to the prior art.

 Rotor according to the prior art Figure 3 is a cross-sectional view showing a swash plate compressor equipped with a re-valve.

4 is a cross-sectional view showing a swash plate compressor according to an embodiment of the present invention.

5 is a perspective view illustrating the cylinder block of FIG. 4.

6 is a perspective view illustrating another embodiment in which a rotary valve is mounted on the driving shaft of FIG. 4.

7 is a front cross-sectional view of FIG. 5.

<Explanation of symbols for the main parts of the drawings>

100: cylinder block 110: cylinder bore

120: coupling hole 130: communication hole

131: inlet 132: outlet

200: piston 310: front housing

320: rear housing 400: drive shaft

500: swash plate 600: valve plate

R: Rotary Valve R1: Refrigerant Discharge Outlet

Claims (4)

A housing, a cylinder block having a plurality of cylinder bores and communication holes formed therein, coupled to the housing, a piston accommodated reciprocally in the cylinder bore, and a drive shaft rotatably installed with respect to the housing and cylinder block; And a swash plate rotating by the drive shaft and interlocked with the piston, a valve plate interposed between the housing and the cylinder block, and a sliding plate formed on the inner surface of the coupling hole formed in the cylinder block to rotate together with the drive shaft. In the swash plate compressor comprising a rotary valve freely installed, The communication hole has an inlet and an outlet, The inlet and outlet are spaced apart in the circumferential direction of the drive shaft, The swash plate compressor equipped with a rotary valve, characterized in that the cross-sectional area of the inlet and outlet of the communication hole is formed different. The method of claim 1, The inner wall surface of the communication hole is a swash plate type compressor equipped with a rotary valve, characterized in that inclined in a straight line or curve. delete The method according to claim 1 or 2, The rotary valve is a swash plate compressor equipped with a rotary valve, characterized in that detachably coupled to the drive shaft.

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