KR101125808B1 - Reciprocating compressor - Google Patents

Abstract

The present invention relates to a reciprocating compressor, comprising a front block and a rear housing, a cylinder block disposed between the front housing and the rear housing and having a plurality of cylinder bores, and a piston reciprocally accommodated in the cylinder bore. And a valve plate provided between the cylinder block and the rear housing so as to face the bottom of the piston, the valve plate having the inlet port and the outlet port formed therein, and discharge opening and closing means for opening and closing the outlet port of the valve plate. ,

The discharge opening and closing means is provided between the cylinder block and the rear housing at the rear of the valve plate, characterized in that it comprises a valve body for opening and closing the discharge port by the elastic force of the pressing means having elasticity.

According to the reciprocating compressor according to the present invention, by replacing the conventional thin lead-type discharge lead valve with a valve body moving by the elastic force of the pressing means, the movement restriction of the discharge valve body in the discharge port axial direction is reduced compared with the conventional By efficiently discharging the compressed refrigerant to minimize the residual refrigerant remaining in the cylinder bore it is possible to increase the compression efficiency.

 Compressor, valve support plate, valve body, pressurizing means, guide part, elastic member

Description

Reciprocating Compressor {RECIPROCATING COMPRESSOR}

The present invention relates to a discharge support opening and closing means for opening and closing the discharge port formed in the valve plate in more detail comprises a valve support plate, a pressurizing means, a valve body to open or discharge the outlet through the movement of the valve body by the elasticity of the pressing means It relates to a reciprocating compressor for closing.

In general, a compressor used in an automobile air conditioner has a function of sucking the evaporated heat exchange medium in the evaporator, compressing the sucked heat exchange medium, and pumping the compressed heat exchange medium to continuously cool the refrigerant. To be circulated.

Such compressors are of various types, such as a swash plate type, a scroll type, a rotary type, and a wobble plate type.

Hereinafter, an example of a swash plate compressor according to the prior art will be described with reference to FIG. 1.

1 is an exploded perspective view showing a valve plate and a valve opening and closing means applied to a swash plate compressor according to the prior art.

Conventional swash plate compressors include a front housing and a rear housing, a cylinder block disposed between the front housing and the rear housing, the cylinder block having a plurality of cylinder bores, a piston reciprocally accommodated in the cylinder bore, and the front A drive shaft that rotates with respect to the housing, a piston drive means connected between the piston and the drive shaft, a valve plate provided opposite the bottom of the piston and having an inlet port and an outlet port formed therein, and a suction chamber and a discharge chamber formed in the rear housing. It is configured.

As shown in FIG. 1, the suction port and the discharge port are opened or closed by the discharge lead valve 11 and the suction lead valve 12 provided on both sides of the valve plate 10.

In addition, the gasket 14 is sealed at the front of the valve unit 13 formed of a combination of the valve plate 10, the discharge lead valve 11, and the suction lead valve 12 between the rear housing and the valve unit 13. It is provided.

In addition, it is necessary to limit the amount of warpage in consideration of the durability of the discharge lead valve 11 made of a thin metal plate, conventionally limiting the amount of warpage of the discharge lead valve 11 to the gasket 14 and At the same time, a retainer 15 is provided to support the discharge lead valve.

However, in the related art, since a complicated structure such as a valve plate 10, a discharge lead valve 11, a retainer 15, and the like must be provided to open and close the discharge port, productivity and assemblability are weakened.

In addition, the retainer 15 is provided to limit the bending amount of the discharge lead valve 11 made of a thin thin metal material, which is inconvenient to be provided with a separate means for fixing the retainer 15 and a shape for fixing. Had a point.

In addition, since the discharge lead valve 11 is limited in the amount of bending in the discharge port axial direction due to the retainer 15, all of the compressed refrigerant in the cylinder bore is not discharged, thereby reducing the compression efficiency due to the residual refrigerant.

An object of the present invention is to solve the above problems, to eliminate the conventionally applied retainer and the means for fixing the retainer to form a discharge valve of a simpler configuration and other discharge lead valve made of a thin sheet It is applied to the configuration to provide a reciprocating compressor that can increase the compression efficiency by minimizing the residual refrigerant remaining in the cylinder bore.

The reciprocating compressor of the present invention, which is designed to achieve the object as described above, comprises a front block and a rear housing, a cylinder block disposed between the front housing and the rear housing and having a plurality of cylinder bores, and the cylinder bore. A piston which is reciprocally accommodated in the air, a valve plate disposed between the cylinder block and the rear housing so as to face the bottom of the piston, the inlet and the outlet being formed, and discharge opening and closing means for opening and closing the outlet of the valve plate. In the reciprocating compressor configured to include,

The discharge opening and closing means is provided between the cylinder block and the rear housing at the rear of the valve plate, characterized in that it comprises a valve body for opening and closing the discharge port by the elastic force of the pressing means having elasticity.

The discharge opening / closing means is provided to be in contact with the rear side of the valve plate, and includes a plurality of receiving grooves spaced in the circumferential direction so as to face the discharge hole, and one side of each receiving groove has a refrigerant discharge port. A valve support plate formed; A plurality of pressing means disposed in each receiving groove of the valve support plate and having elastic force; And a plurality of valve bodies, one end of which is in contact with the pressurizing means, pressurized by the high-pressure refrigerant discharged through the discharge port to open the discharge port, and the position is restored by the elastic restoring force of the pressing means to close the discharge port. It features.

In addition, the pressing means is characterized in that the leaf spring or coil spring.

In addition, the valve body, the body portion in contact with the pressing means; Protruding from the one side of the body portion having a cross-sectional area smaller than the cross-sectional area of the body portion, and includes a protrusion inserted into the discharge port to close the discharge port and separated from the discharge port to open the discharge port, wherein the protrusion is inserted into the discharge port One side of the body portion is characterized in that the contact with the valve plate.

In addition, when the pressing means is applied as a leaf spring, the leaf spring is characterized in that it is made of a structure in which the corrugated shape is periodically repeated along the edge.

In addition, the thickness of the protrusion is the same as the thickness of the discharge port, the cross-sectional diameter of the protrusion is equal to or less than the inner diameter of the discharge port, characterized in that the outer diameter of the body portion is larger than the inner diameter of the discharge port.

In addition, at least two guide parts are formed on sidewalls forming the receiving grooves, which are spaced apart from each other along the circumferential direction and protrude toward the inside of the receiving grooves from the sidewalls. The refrigerant discharge port is characterized in that it is formed.

In addition, the outer surface of the body portion is characterized in that in contact with the side facing the receiving groove center portion of each guide portion, respectively.

In addition, a gasket for preventing refrigerant leakage is further installed between at least one of the valve plate and the valve support plate, between the valve support plate and the rear housing.

In addition, the first gasket provided between the valve plate and the valve support plate is characterized in that a plurality of first through holes having the same shape as the cross-sectional shape of the receiving groove and communicating with the receiving groove.

In addition, the second gasket provided between the valve support plate and the rear housing is characterized in that a plurality of second through holes communicating with the refrigerant outlet are formed.

In addition, the elastic member is further attached to any one or more of one side surface of the body portion, one side surface of the valve plate facing the one side surface of the body portion.

According to the above-mentioned reciprocating compressor according to the present invention, the discharge opening and closing means for opening and closing the discharge port of the valve plate includes a valve support plate, the pressing means having elasticity and the valve body inserted into or separated from the discharge opening by the elasticity of the pressing means By constructing, the retainer and the discharge lead valve are eliminated as compared with the related art, thereby making it simpler and thereby improving productivity.

In addition, by replacing the conventional thin lead discharge valve with a valve body moving by the elastic force of the pressing means, the movement restriction in the discharge port axial direction of the discharge valve body is reduced compared to the conventional to efficiently discharge the compressed refrigerant It is possible to increase the compression efficiency by minimizing the residual refrigerant remaining in the cylinder bore.

In addition, by providing the elastic member, the detachable noise and vibration between the valve plate and the valve body can be further reduced.

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

Figure 2 is a side cross-sectional view showing a reciprocating compressor according to an embodiment of the present invention, Figure 3 is a partial cutaway perspective view showing a portion of Figure 2, Figure 4 is a side cross-sectional view of Figure 3, Figure 5 is an embodiment of the present invention Front and back views showing the discharge opening and closing means according to the example, Figure 6 is an exploded perspective view of FIG.

As shown in FIG. 2, the reciprocating compressor according to the exemplary embodiment of the present invention is disposed between the front housing 100 and the rear housing 110, the front housing 100 and the rear housing 110, and a plurality of compressors. A cylinder block 200 having two cylinder bores 210, a piston 300 reciprocally accommodated in the cylinder bore 210, and a drive shaft 310 rotating relative to the front housing 100. And a swash plate 400 connected between the piston 300 and the drive shaft 310 and an inlet 510 and an outlet 520 which are installed to face the bottom of the piston 300 so that refrigerant is introduced and discharged. It comprises a valve plate 500.

Meanwhile, in the rear housing 110, a suction chamber 610 in which refrigerant is sucked from the outside through a suction port (not shown) and a discharge chamber 620 in which the compressed refrigerant is discharged in the cylinder bore 210 are discharged. It is provided.

Here, although the discharge chamber 620 is formed outside the suction chamber 610 in FIG. 2, the discharge chamber 620 is not necessarily limited thereto, and the discharge chamber 620 may be formed inside the suction chamber 610.

In addition, the refrigerant introduced into the suction chamber 610 from the outside is a suction valve installed on one side of the valve plate 500, specifically, a cylinder via the suction port 510 of the valve plate 500 through the opening of the suction lead valve. Flow into the bore 210.

On the contrary, the refrigerant having been compressed in the cylinder bore 210 is discharged through the discharge port 520 of the valve plate 500 through opening of the discharge opening and closing means installed at the other side of the valve plate 500 and the right side of the drawing. Is discharged to 620.

In addition, the valve plate 500 is interposed between the cylinder block 200 and the rear housing 110.

In the embodiment of the present invention, the discharge opening and closing means 700 is provided to open and close the discharge port 520 of the valve plate 500.

3 to 6, the discharge opening and closing means 700 is installed in the rear toward the rear housing 110 of the valve plate 500 between the cylinder block 200 and the rear housing 110. And a valve body 730 to be described later, which directly opens and closes the discharge port 520 by the elastic force of the pressing means 720 having elasticity described later.

Specifically, the discharge opening and closing means 700 comprises a valve support plate 710, the pressing means 720 and the valve body 730.

As shown in FIGS. 3 and 4, the valve support plate 710 is installed to be in contact with a rear side surface of the valve plate 500 toward the rear housing 110, and the outlet 520 of the valve plate 500 is provided. It is provided with a plurality of receiving grooves 711 spaced apart in the circumferential direction.

As shown in FIG. 6, a coolant discharge port 712 is formed at one side of the receiving groove 711, specifically, at the circumference thereof, and the cylinder is opened when the discharge port 520 is opened by the movement of the valve body 730, which will be described later. The high pressure refrigerant compressed in the bore is introduced into the discharge chamber 620 of the rear housing 110 after passing through the discharge port 520 and the refrigerant discharge port 712.

In addition, the receiving grooves 711 are equal to the number of cylinder bores, that is, the number of the discharge holes 520, and spaced apart from each other along the circumferential direction of the valve support plate 710 so as to communicate with the discharge holes 520. Formed.

The pressing means 720 is arranged in each receiving groove 711 of the valve support plate 710 to have a predetermined or more elastic force.

The valve body 730 is configured to directly open or close the discharge port 520, and a part of the valve body 730 is disposed in the receiving groove 711, similar to the pressing means, with one end thereof in contact with the pressing means 720. have.

Specifically, as shown in FIGS. 4 and 6, the valve body 730 has a body portion 731 in contact with the pressing means 720, and a body portion 731 from one side of the body portion 731. It includes a protrusion 732 protruding in a state having a cross-sectional area smaller than the cross-sectional area of the.

That is, when the refrigerant is sucked in the cylinder bore, the protrusion 732 is inserted into the discharge port 520 by the elastic force of the pressing means 720 to close the discharge port 520, the compression is completed in the cylinder bore When the high-pressure refrigerant is discharged through the discharge port 520, the discharge part is pressed out from the discharge port 520 by pressing the protrusion 732 by the discharge pressure to open the discharge port.

In addition, when the discharge of the refrigerant to the discharge port is completed, the valve body 730, specifically, the protrusion 732 is inserted into the discharge port 520 again by the elastic restoring force of the pressing means to close the discharge port.

As shown in Figure 4 and 6, the pressing means 720 may be applied as a leaf spring or a coil spring having a constant spring constant, it is sufficiently compressed by the discharge pressure of the compressed high-pressure refrigerant to open the discharge port It is desirable to have an elastic force to the extent possible.

In addition, the outer diameter of the pressing means may be formed to be equal to or less than the diameter of the body portion 731 so that the protrusions do not move left and right during simultaneous movement of the protrusion 732 by compression and relaxation of the pressing means 720. It is more preferable to form the same among these.

In addition, when the pressing means 720 is applied as a leaf spring, the leaf spring may have a structure in which the corrugated shape is periodically repeated along the edge.

That is, the valve body 730 is in contact with the pressing means 720 in a state in which the contact portion and the non-contact portion are formed alternately along the circumferential direction, and the press means 720 also periodically contacts along the circumferential direction. And the receiving groove 711 of the valve support plate 710 in a state where the non-contact portion is alternately formed.

Therefore, when the valve body 730 is moved by the elasticity of the pressing means 720, its straightness can be further improved.

On the other hand, as shown in Figure 4, when the refrigerant is sucked in the cylinder bore, the protrusion 732 is inserted into the discharge port 520, wherein one side of the body portion 731 is a valve plate ( 500).

Further, when the opening and closing of the discharge port 520 is periodically repeated by the movement of the valve body 730, periodic impact noise may occur between the body portion 731 and the valve plate 500 of the valve body. To minimize this, at least one of one side of the body portion 731, one side of the valve plate 500 facing the one side of the body portion 731 may be further attached to an elastic member (not shown). .

In addition, when the valve body 730 itself is formed of a rubber material, the elastic member (not shown) may be made of a softer rubber material than the valve body 730.

Meanwhile, the thickness of the protrusion 732 may be the same as the thickness of the discharge hole 520. However, the present invention is not limited thereto, and may have a thickness smaller than that of the discharge port 520 so as to quickly react to discharge of the high-pressure refrigerant to open the discharge port 520.

Similarly, the cross-sectional diameter of the protrusion 732 may be the same as the inner diameter of the discharge port 520 to completely close the discharge port 520 during the suction process of the refrigerant to prevent the refrigerant from being discharged minutely.

However, this also is not necessarily limited, and as described above, may be smaller than a predetermined diameter than the inner diameter of the discharge port 520 so as to quickly react to the discharge of the high-pressure refrigerant to open the discharge port 520.

That is, a gap may be formed to some extent between the outer surface of the protrusion 732 and the inner circumferential surface of the discharge hole 520 while the protrusion 732 is inserted into the discharge hole 520.

In addition, when the discharge port 520 is closed, the protrusion 732 is inserted into the discharge port, and the other end side surface of the body part 731 facing the valve plate 500 is in contact with the valve plate 500. Will have

That is, the discharge port 520 is closed by the protrusion 732 inserted therein and the body 731 contacting the valve plate 500.

Therefore, the outer diameter of the body portion 731 is preferably larger than a predetermined diameter than the inner diameter of the discharge port 520.

In the embodiment of the present invention, as shown in Figure 6, the side wall forming the receiving groove 711 of the valve support plate 710 is spaced apart from each other along the circumferential direction of the receiving groove 711 Guide portion 713 is formed to protrude toward the inside.

On the other hand, the outer surface of the body portion 731 is in contact with the side toward the inner center portion of the receiving groove 711 of the guide portion 713.

That is, when the valve body 730, ie, the body portion 731 is moved by the elasticity of the pressing means 720, the outer surface of the body portion moves in contact with the side of the guide portion, so that the straight mobility is further ensured, the discharge port 520 ) Will open or close correctly.

Here, it is preferable that at least two guide parts 713 are formed at predetermined intervals from each other along the circumference of the sidewall of the receiving groove 711 for the above-described reason.

Meanwhile, a coolant discharge port 712 is formed at a bottom surface of the accommodation groove 711 between the neighboring guide parts 713.

Therefore, in the state where the discharge port 520 is opened by the movement of the valve body 730, the high pressure refrigerant via the discharge port 520 is discharged to the discharge chamber 620 of the rear housing after passing through the refrigerant discharge port 712. It is done.

On the other hand, as shown in Figure 6, between the valve plate 500 and the valve support plate 710, at least one of the valve support plate 710 and the rear housing 110 to prevent refrigerant leakage More gaskets are installed.

Here, the first gasket 750 installed between the valve plate 500 and the valve support plate 710 has the same shape as the cross-sectional shape of the receiving groove 711 and communicates with the receiving groove 711. The first through hole 751 is formed.

In addition, the second gasket 760 provided between the valve support plate 710 and the rear housing 110 may include a plurality of second through holes 761 communicating with the refrigerant outlet 712 formed in the valve support plate 710. ) Is formed.

Therefore, the high pressure refrigerant compressed in the cylinder bore is discharged from the rear housing 110 after sequentially passing through the discharge port 520, the first through hole 751, the refrigerant discharge port 712, and the second through hole 761. Discharged to the chamber 620.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. Or modifications may be possible.

1 is an exploded perspective view showing a valve plate and a valve opening and closing means applied to a swash plate compressor according to the prior art.

Figure 2 is a side cross-sectional view showing a reciprocating compressor according to an embodiment of the present invention.

3 is a partial cutaway perspective view of a portion of FIG. 2;

4 is a side cross-sectional view of FIG.

5 is a front view and a rear view showing the discharge opening and closing means according to an embodiment of the present invention.

6 is an exploded perspective view of FIG. 5;

*** Explanation of symbols for the main parts of the drawing ***

100: front housing 110: rear housing

200: cylinder block 210: cylinder bore

300: piston 310: drive shaft

400: swash plate 500: valve plate

510: suction port 520: discharge port

610: suction chamber 620: discharge chamber

700: discharge opening and closing means 710: valve support plate

711: receiving groove 712: refrigerant outlet

713: guide portion 720: pressing means

730: valve body 731: body portion

732: protrusion 750: first gasket

751: first through hole 760: second gasket

761: second through hole

Claims (12)

A cylinder block disposed between the front housing and the rear housing, the front housing and the rear housing, and having a plurality of cylinder bores, a piston accommodated reciprocally in the cylinder bore, and a cylinder facing the bottom of the piston. A reciprocating compressor comprising a valve plate provided between a block and a rear housing and having a suction port and a discharge port formed therein, and discharge opening and closing means for opening and closing the discharge port of the valve plate. The discharge opening and closing means, A valve support plate installed to be in contact with one side of the rear surface corresponding to the valve plate and having a plurality of receiving grooves spaced in the circumferential direction so as to face the discharge hole, and having a refrigerant discharge hole formed around each of the receiving grooves; A plurality of pressing means disposed in each receiving groove of the valve support plate and having elastic force; And One end portion is in contact with the pressing means, is pressed by the high-pressure refrigerant discharged through the discharge port to open the discharge port, the position is restored by the elastic restoring force of the pressing means comprises a plurality of valve body for closing the discharge port Reciprocating compressors. delete The method of claim 1, The pressurizing means is a reciprocating compressor, characterized in that the leaf spring or coil spring. The method of claim 1, The valve body, A body part in contact with the pressing means; Protruding from the one side of the body portion having a cross-sectional area smaller than the cross-sectional area of the body portion, and inserted into the discharge port to close the discharge port and is separated from the discharge port to include a protrusion for opening the discharge port, When the protrusion is inserted into the discharge port, one side of the body portion is in contact with the valve plate, characterized in that the compressor. The method of claim 3, When the pressing means is applied to the leaf spring, the leaf spring is reciprocating compressor, characterized in that made of a structure that is repeated periodically corrugated shape along the edge. 5. The method of claim 4, The thickness of the protrusion is equal to the thickness of the discharge port, the cross-sectional diameter of the protrusion is equal to or less than the inner diameter of the discharge port, the outer diameter of the body portion is characterized in that the larger than the inner diameter of the discharge port. The method according to any one of claims 1, 3, 4, 5, and 6, At least two guide parts are formed on the sidewalls forming the receiving grooves and are spaced apart from each other along the circumferential direction and protrude toward the inside of the receiving grooves from the sidewalls. Reciprocating compressor, characterized in that the refrigerant outlet is formed on the bottom surface of the receiving groove between the neighboring guide. The method of claim 7, wherein An outer surface of the body portion in contact with the pressing means is in contact with the side facing the center of the receiving groove of each guide portion, respectively. The method of claim 7, wherein And at least one of the valve plate and the valve support plate, between the valve support plate and the rear housing, is further provided with a gasket for preventing refrigerant leakage. 10. The method of claim 9, The first gasket installed between the valve plate and the valve support plate has a same shape as the cross-sectional shape of the receiving groove and a plurality of first through holes communicating with the receiving groove is formed. 10. The method of claim 9, The second gasket provided between the valve support plate and the rear housing is formed with a plurality of second through holes communicating with the refrigerant outlet. The method of claim 6, Reciprocating compressor, characterized in that the elastic member is further attached to any one or more of one side of the body portion, one side of the valve plate facing the one side of the body portion.

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