KR101089963B1 - Oil separator for reciprocating compressor having insulation function - Google Patents

Abstract

The present invention relates to an adiabatic oil separator of a reciprocating compressor, comprising a housing, a cylinder block having a plurality of cylinder bores, a piston reciprocally accommodated in the cylinder bore, and a piston driving means for driving the piston. A suction and discharge chamber formed in the housing via the suction and discharge valve unit provided opposite to the piston connecting shaft connected to the piston, the bottom of the piston, and having an inlet and an outlet. An internal recess mounted to the reciprocating compressor including a gas outlet; An outer circumferential recess formed along a circumference of the inner recess and communicating with the discharge port; It is configured to include an oil outlet communicated to the outside from the inner recess, it is made of a heat insulating material and is characterized in that it is built in the discharge chamber, it is possible to increase the efficiency of the compressor and maintain durability and sucked from the suction chamber Since the suction refrigerant is not thermally affected by the discharge refrigerant exiting through the discharge port, the volumetric efficiency of the compressor can be maintained high.

Description

OIL SEPARATOR FOR RECIPROCATING COMPRESSOR HAVING INSULATION FUNCTION}

The present invention relates to an adiabatic oil separator of a reciprocating compressor, and more particularly, it separates oil before the discharged refrigerant is discharged from the discharge chamber to the outside of the compressor, and at the same time maintains the performance of the reciprocating compressor. To an insulating oil separator.

Common reciprocating compressors, which are widely used as compressors for automobile air conditioners, are commonly provided with pistons, piston drives, cylinder blocks, and valves.

As a representative example of a reciprocating compressor, swash plate compressors are used in recent years. The inclination angle of the swash plate is changed according to the change of the heat load to achieve precise movement control by controlling the feed amount of the piston, while the inclination angle is continuously changed to reduce the sudden torque fluctuation of the engine by the compressor, so that the ride comfort of the vehicle even during operation of the compressor. There is a feature to improve.

In the reciprocating compressor, the refrigerant is sucked from the suction chamber and compressed by a piston, and the compressed refrigerant is discharged to the discharge chamber and sent to the next cooling cycle.

Since some oil is mixed in the refrigerant discharged into the discharge chamber in this process, it is necessary to separate it and discharge only pure refrigerant gas. This is because the presence of oil in the refrigeration cycle increases the flow resistance, disturbs the heat transfer and lowers the overall system efficiency.

A representative configuration of an oil separator for separating oil from a refrigerant is disclosed in Japanese Patent Laid-Open No. 2004-036583, which is briefly described with reference to FIG. 1.

First, the compressor disclosed in the publication is a swash plate type compressor, which includes a front housing 1 and a rear housing 3, a cylinder block 2 disposed between the front housing 1 and the rear housing 3, and The piston 7 reciprocates in the cylinder 2a of the cylinder block 2 and is disposed in the housing through the front part of the housing 1 and 3 to transmit the rotational movement from external power. A swash plate 6 connected to the rotary shaft 4 for driving (7), the swash plate 6 connected to the plurality of pistons 7 and inclined to the rotary shaft 4, and the swash plate 6, etc. 36).

On the other hand, the oil separator 26 is provided in the vicinity of the discharge chamber 33 of the rear housing (3). The oil separator 26 is installed in the rear housing by using a centrifugal force and penetrates the valve plate 20.

Of course, the separated oil is supplied to the site requiring lubrication through the flow path 27 and the gas refrigerant is joined in the refrigerant cycle through the refrigerant outlet 54.

However, in such a conventional swash plate type compressor, the oil separator 26 is provided not only through the valve plate 20 but also in the vicinity of the discharge chamber 33 instead of inside. That is, the structure of the valve plate 20 had to be matched to the oil separator 26 and a space for installing the oil separator 26 needs to be separately provided.

Therefore, the conventional assembly and manufacturing of the compressor has a disadvantage.

In addition, conventionally, since the discharged refrigerant is in direct contact with the rear housing 3, the temperature of the suction gas sucked into the suction chamber 32 is increased to affect the volumetric efficiency of the compressor.

Technical Challenge

The present invention has been made to solve the above-mentioned problems, the object of the invention is to isolate the oil before the refrigerant discharged from the compressor discharged to the outside of the compressor in the insulation of the reciprocating compressor that can maintain the performance of the compressor by separating the oil An oil separator is provided.

In particular, it is an object of the present invention to provide an insulating oil separator of a reciprocating compressor that is easy to assemble and manufacture.

It is also an object of the present invention to provide an adiabatic oil separator of a reciprocating compressor in which the discharged refrigerant does not thermally affect the suction refrigerant gas so as to maintain the original volumetric efficiency of the compressor.

Technical solution

In order to achieve the above object, the adiabatic oil separator of the reciprocating compressor according to the present invention,

A housing consisting of a front housing and a rear housing, a cylinder block having a plurality of cylinder bores, a piston accommodated reciprocally in the cylinder bore, piston drive means for driving the piston, and a piston connected to the piston. A reciprocating compressor comprising a connecting shaft, a suction / discharge valve device which is provided opposite the bottom of the piston, and has a suction port and a discharge port, and a suction chamber and a discharge chamber formed in the housing via the suction / discharge valve device. As an adiabatic oil separator in

An internal recess in which a gas outlet is formed;

An outer circumferential recess formed along a circumference of the inner recess and communicating with the discharge port;

And an oil outlet communicating with the outside from the inner recess.

It is characterized in that it is built in the discharge chamber.

Here, the inner recess is separated from the outer circumferential recess by the guide wall, and the inner recess and the outer recess are recessed by the coolant introduction groove formed in the tip of the guide wall or the coolant introduction hole formed in the side of the guide wall. It is desirable to communicate.

The coolant introduction groove is preferably formed to be inclined along the moving direction of the coolant.

When viewed from the axial direction, the inlet of the refrigerant introduction groove is preferably formed in a smooth curved shape.

In addition, the coolant introduction groove is preferably formed to be inclined along the moving direction of the coolant.

In addition, when viewed from the axial direction, the inlet of the refrigerant introduction hole is preferably formed in a smooth curved shape.

In addition, when viewed from the axial direction, the outer shape of the guide wall is a heat insulating oil separator of the reciprocating compressor, characterized in that the circular.

In addition, the center of the inner recess is preferably eccentric with respect to the center of the gas outlet.

In this case, it is preferable that an inlet of the coolant introduction groove or the coolant introduction hole is formed in a wide portion of the outer circumferential recess.

Of course, the center of the inner recess may coincide with the center of the outer recess.

On the other hand, the gas outlet is preferably formed to protrude toward the suction / discharge valve device from the bottom of the inner recess.

In this case, when viewed from the axial direction, the gas outlet is preferably formed in a circular shape.

In addition, it is preferable that a fitting protrusion for fitting into a groove formed in the rear housing is formed at the bottom of the outer surface.

In this case, the fitting protrusion is preferably formed in a hollow communication with the gas outlet.

In addition, when viewed from the axial direction, it is preferable that periodic irregularities are formed along the circumferential direction of the oil separator, and the rear housing is formed with an uneven groove that fits into the irregularities of the oil separator.

On the other hand, the oil separator is preferably composed of a heat insulating material.

And, the insulation may be composed of PEEK.

1A is a longitudinal sectional view showing the structure of a conventional general swash plate compressor.

FIG. 1B is a detailed cross-sectional view illustrating the oil separation structure in FIG. 1A.

2 is a longitudinal sectional view showing the structure of a reciprocating compressor equipped with a heat insulating oil separator according to the present invention.

Figure 3 is a longitudinal cross-sectional view of the heat insulating oil separator and the rear housing in FIG.

4 is an exploded perspective view of the adiabatic oil separator and the rear housing of FIG. 3.

5 is a view showing an example of the insulating oil separator in Figure 4, (a) is a perspective view, (b) is a front view.

FIG. 6 is a view showing another example of the adiabatic oil separator in FIG. 4, (a) is a perspective view, and (b) is a front view.

7 is a perspective view showing still another example of the heat insulating oil separator according to the present invention.

Best Mode for Carrying Out the Invention

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

In the accompanying drawings, Figure 2 is a longitudinal cross-sectional view showing the structure of a reciprocating compressor equipped with a heat insulating oil separator according to the present invention, Figure 3 is a longitudinal cross-sectional view of the combined thermal oil separator and rear housing in Figure 2, Figure 4 3 is an exploded perspective view of the adiabatic oil separator and the rear housing, FIG. 5 is a view illustrating an example of the adiabatic oil separator in FIG. 4, and FIG. 6 is an example in which the center of the gas outlet of the adiabatic oil separator is eccentric in FIG. 4. 7 is a view showing an example in which a hole for introducing refrigerant is formed in the side surface of the guide wall according to the present invention.

First, the reciprocating compressor 1000 according to the present invention includes a housing 100, a cylinder block 110 having a plurality of cylinder bores 110a, and a drive shaft rotatably supported by the cylinder block 110. 140, the swash plate 150 is connected to the drive shaft 140 is installed so that the inclination angle can be changed while rotating, and the reciprocating movement to the cylinder bore (110a) by the sliding movement with the swash plate (150) It is formed in the housing 100 via a piston 200 that is possibly accommodated, a suction / discharge valve device 300 provided to face the bottom of the piston 200, and the suction / discharge valve device 300. The suction chamber 131 and the discharge chamber 132 are included.

The housing 100 is composed of a front housing 120 and a rear housing 130 with the cylinder block 110 interposed therebetween.

In addition, a suction chamber 131 and a discharge chamber 132 are formed in the rear housing 130, respectively, and a suction hole for communicating the cylinder bore 110a and the suction chamber 131 to the valve plate 330. 331 and a discharge port 332 which communicates the cylinder bore 110a with the discharge chamber 132 are formed, respectively.

In addition, the suction port 331 and the discharge port 332 formed in the valve plate 330, suction for opening and closing the suction port 331 and the discharge port 332 by the pressure change according to the reciprocating motion of the piston 200. A valve and a discharge valve are respectively provided.

The cylinder block 110 has eight cylinder bores 110a, and the refrigerant introduced from the suction chamber 131 is continuously compressed by the piston 200 reciprocating through the cylinder bore 110a. do.

The drive shaft 140 is rotatably supported by the front housing 120 and the cylinder block 110 via a bearing 400.

In addition, the swash plate 150 is slidably coupled to the piston 200 via the shoe 201.

Furthermore, connecting projections 155 are formed before and after the swash plate 150, respectively, and a connecting link 600 is interposed between the connecting projection 155 and the driving shaft 140, and the hinge pins 610 are connected to each other. Are connected by Therefore, the connection link 600 and the connection protrusion 155, the connection link 600 and the drive shaft 140 can be hinged with respect to each other.

On the other hand, according to the present invention, the oil separator 700 is built in the discharge chamber 132 of the rear housing 130.

That is, according to the present invention, since the refrigerant discharged into the discharge chamber 132 of the rear housing 130 contains some oil, the oil is separated by centrifugal force through the oil separator 700, thereby purifying the pure gaseous refrigerant. Bay can be distributed through the refrigerant cycle.

To this end, the oil separator 700 according to the present invention includes an inner recess 710 in which a gas outlet 711 is formed, and is formed along a circumference of the inner recess 710 and communicates with the discharge port 332. And an outer circumferential recess 720 and an oil outlet 730 communicated outwardly from the inner recess 710.

Overall, the oil separator 700 according to the present invention is circular in the axial direction and bowl-shaped on the side.

First, the refrigerant discharged through the discharge port 332 of the rear housing 130 is introduced into the outer recess 720 of the oil separator 700 and then introduced into the inner recess 710. To this end, a coolant introduction groove 741 is formed across the tip of the guide wall 740 between the inner recess 710 and the outer circumferential recess 720.

Alternatively, as illustrated in FIG. 7, a hole for introducing refrigerant 742 may be formed in the side surface of the guide wall 740.

Of course, the coolant may be introduced by leaving a gap at a predetermined interval as a whole between the guide wall 740 and the suction / discharge valve device 300, but it is difficult to provide sufficient centrifugal force to the coolant.

In particular, the coolant introduction groove 741 and the coolant introduction hole 742 are preferably inclined along the circumferential movement direction of the coolant. In this way, the coolant can be naturally introduced along the tangential direction of the circumference (strictly slightly inclined with respect to the tangent) from the outer circumference recess 720 to the inner recess 710 to impart a large centrifugal force to the coolant. You can do it.

Furthermore, when viewed from the axial direction, the inlet 741a of the coolant introduction groove 741 and the inlet of the coolant introduction hole 742 are formed in a smooth curve (curvature radius R). Introduction is possible.

In addition, the inlet 741a of the coolant introduction groove 741 and the inlet of the coolant introduction hole 742 may have the widest shape so that the coolant flows smoothly.

In addition, when viewed from the axial direction, if the guide wall 740 is circular, it is possible to introduce a smoother refrigerant.

In the drawing, the refrigerant introduction groove 741 and the refrigerant introduction hole 742 are shown as a single along the circumferential direction of the guide wall 740, but it is also possible to form two or more.

On the other hand, the center of the inner recess 710 may be somewhat eccentric with respect to the center of the gas outlet (711). This maximizes the oil separation function because the width of the refrigerant passage varies by eccentricity.

In addition, since the pressure increases in a wide area of the coolant passage, the coolant introduction groove 741 or the coolant introduction hole 742 can be formed in this portion to allow the smooth introduction of the coolant.

Of course, even if the center of the inner recess 710 coincides with the center of the outer recess 720, oil separation by centrifugal force is possible.

Meanwhile, the gas outlet 711 may be formed to protrude from the bottom of the inner recess 710 toward the suction / discharge valve device 300. In this manner, the separated minute amount of oil may be prevented from being discharged together with the refrigerant gas through the gas outlet 711 by riding on the bottom of the inner recess 710.

In addition, when viewed from the axial direction, the gas outlet 711 is formed in a circular shape so as not to impede the centrifugal force to the refrigerant.

In addition, the bottom of the outer surface of the oil separator 700 has a fitting protrusion 770 for fitting into the groove 139 formed inside the rear housing 130 is easy to assemble. The fitting protrusion 770 is advantageously formed in a hollow form in communication with the gas outlet 711.

In addition, when viewed from the axial direction, periodic irregularities 790 are formed along the circumferential direction of the oil separator 700, and the rear housing 130 also has irregularities fitted to the irregularities 790 of the oil separator. Since the groove 138 is formed, the assembling work is easy and the shake is eliminated during operation.

On the other hand, the material of the insulating oil separator 700 is preferably composed of a heat insulating material such as PEEK. Of course, other heat resistant materials, such as synthetic resin, may be adopted in addition to PEEK.

Since the oil separator 700 is formed of a heat insulating material, the suction refrigerant suctioned from the suction chamber 131 is hardly thermally affected by the discharge refrigerant exiting through the discharge port 332, thereby obtaining a predetermined volumetric efficiency.

Next, the operation of the components around the insulating oil separator 700 according to the present invention will be described schematically.

First, when the compressor 1000 is operated, the pulley P connected to the engine (not shown) rotates, and the drive shaft 140 installed in the pulley P rotates.

As the drive shaft 140 rotates, the swash plate 150 rotates in a variable inclination, and the piston 200 performs a compression action while sliding by the swash plate 150.

That is, the refrigerant introduced through the suction port 331 of the suction / discharge valve device 300 is compressed in the cylinder bore 110a by the piston 200, and the compressed refrigerant is discharged from the suction / discharge valve device 300. The outlet 332 is introduced into the outer circumferential recess 710 of the adiabatic oil separator 700.

Subsequently, centrifugal force is applied to the refrigerant while the refrigerant is introduced into the internal recess 710 from the outer circumference recess 720 through the refrigerant introduction groove 741 or the refrigerant introduction hole 742 formed in the guide wall 740. .

At this time, the oil having a high density accumulates at the bottom of the side of the inner recess 710 outside the gas outlet 711, and is continuously directed to the control valve 800 through the oil outlet 730.

The oil through the control valve 800 is supplied to each part through the swash plate chamber 120a or the drive shaft 140 by the oil pump 910.

The above arrangement represents only one embodiment and may be applied by one skilled in the art to other general reciprocating compressors including pistons, cylinder blocks, piston drive means, housings and suction / discharge valve devices in addition to swash plate compressors.

According to the configuration of the present invention as described above, by separating the oil from the refrigerant flowing into the discharge chamber it is possible to increase the efficiency of the compressor and to maintain durability.

In addition, according to the present invention, the introduction of the coolant can be smoothly provided at the tip of the guide wall by having a coolant introduction groove or a coolant introduction hole formed in the side of the guide wall.

Further, according to the present invention, the configuration of the coolant introduction groove and the coolant introduction hole can be specified to facilitate the introduction of the coolant.

In addition, according to the present invention, the center of the inner recess is eccentric with respect to the center of the gas outlet, so that the pressure difference can be provided to facilitate the introduction of the coolant through the coolant introduction groove.

In addition, according to the present invention, the gas outlet can be formed to protrude from the bottom of the inner recess toward the suction / discharge valve device to prevent some oil is discharged with the refrigerant gas after oil separation.

In addition, according to the present invention, since the insulating oil separator is composed of a heat insulating material, the suction refrigerant suctioned from the suction chamber is not thermally influenced by the discharge refrigerant exiting through the discharge port, thereby maintaining a high volumetric efficiency of the compressor.

In addition, according to the present invention, the bottom of the outer surface of the oil separator is formed with a fitting protrusion for fitting into the groove formed in the inner side of the rear housing is easy to assemble and strong assembly strength.

Claims (17)

A housing consisting of a front housing and a rear housing, a cylinder block having a plurality of cylinder bores, a piston accommodated reciprocally in the cylinder bore, piston drive means for driving the piston, and a piston connected to the piston. A reciprocating compressor comprising a connecting shaft, an intake / discharge valve device provided opposite the bottom of the piston and having an inlet and an outlet, and a suction chamber and a discharge chamber formed in the housing via the intake / discharge valve device. Heat insulation oil separator, An internal recess in which a gas outlet is formed; An outer circumferential recess formed along a circumference of the inner recess and communicating with the discharge port; And an oil outlet communicating from the inner recess to the outside, and the adiabatic oil separator of the reciprocating compressor, characterized in that it is built in the discharge chamber. The method of claim 1, The inner recess is separated from the outer circumferential recess by a guide wall, and the inner and outer recesses are formed in at least one of a coolant introduction groove formed in the tip of the guide wall and a coolant introduction hole formed in the side of the guide wall. Insulating oil separator of a reciprocating compressor, characterized in that the communication. 3. The method of claim 2, The refrigerant introduction groove is a heat insulating oil separator of the reciprocating compressor, characterized in that formed inclined along the movement direction of the refrigerant. The method of claim 3, When viewed from the axial direction, the inlet of the refrigerant introduction groove is an insulating oil separator of the reciprocating compressor, characterized in that formed in a smooth curve. 3. The method of claim 2, The refrigerant introduction hole is a heat insulating oil separator of the reciprocating compressor, characterized in that formed inclined along the movement direction of the refrigerant. The method of claim 3, When viewed from the axial direction, the inlet of the refrigerant introduction hole is an insulating oil separator of the reciprocating compressor, characterized in that formed in a smooth curve. The method according to any one of claims 2 to 6, Insulating oil separator of a reciprocating compressor, characterized in that the shape of the guide wall is circular when viewed from the axial direction. The method of claim 7, wherein And the center of the inner recess is eccentric with respect to the center of the gas outlet. The method of claim 8, Insulating oil separator of a reciprocating compressor, characterized in that the inlet of the refrigerant introduction groove or the refrigerant introduction hole is formed in a wide portion of the outer peripheral recess. The method of claim 7, wherein And the center of the inner recess coincides with the center of the outer recess. The method according to any one of claims 3 to 6, The gas outlet is a heat insulating oil separator of the reciprocating compressor, characterized in that protruding from the bottom of the inner recess toward the suction / discharge valve device. The method of claim 11, As viewed from the axial direction, the gas outlet is a heat insulating oil separator of the reciprocating compressor, characterized in that formed in a circular shape. 3. The method of claim 2, Insulating oil separator of a reciprocating compressor, characterized in that the bottom of the outer surface of the oil separator is fitted with a fitting protrusion for fitting into the groove formed inside the rear housing. The method of claim 13, The fitting projection is a heat insulating oil separator of the reciprocating compressor, characterized in that formed in a hollow communication with the gas outlet. The method according to any one of claims 1 to 6, When viewed from the axial direction, the periodic ruggedness is formed along the circumferential direction of the oil separator, and the rear housing is formed with an uneven groove that fits into the ruggedness of the oil separator. Insulating oil separator. The method according to any one of claims 1 to 6, Insulating oil separator of a reciprocating compressor, characterized in that the material is composed of a heat insulating material. The method of claim 16, The insulating material is an insulating oil separator of the reciprocating compressor, characterized in that consisting of PEEK.

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