KR20030013976A - Compressor having an oil spraration apparatus - Google Patents

Abstract

PURPOSE: A compressor having an oil separator is provided to improve the separation efficiency of oil and the cooling efficiency of the separated oil, thereby preventing the compressor from locking. CONSTITUTION: A compressor(20) having an oil separator includes a housing(21) having a suction muffler(21a) or a vent muffler(21b); a cover member(23) coupled with the housing and forming an oil separating chamber(22) having an inlet port(24a) for flowing a compressed heat exchange medium and an outlet port(24b) connected with the vent muffler; baffles(25) installed at one side of the housing and the cover member for extending a passage of the heat exchange medium flowed into the inlet port; a gasket(40) formed between the housing and the cover member, and having an oil return passage for supplying oil separated by the oil separating chamber to an oil supply path(21c) communicated with the suction muffler; and an oil separator(31) installed at the oil separating chamber for separating the oil from the heat exchange medium and cooling the oil.

Description

Compressor having an oil spraration apparatus

The present invention relates to a compressor, and more particularly to a compressor having an oil separator for separating the oil carried by the refrigerant.

Conventionally, a compressor used in an automobile air conditioner has a function of sucking a heat exchange medium vaporized in an evaporator, compressing the sucked heat exchange medium, and discharging the compressed heat exchange medium. To pump continuously.

Such compressors include a swash plate type, a scroll type, a rotary type, a wobble plate type, and a crank type according to a compression method and a driving method.

The compressor is filled with lubricating oil therein for smooth driving. The oil filled in this way is lubricated in the mechanical friction of the compressor by piggybacking on the heat exchange medium which is a compression medium when the compressor is driven.

On the other hand, the oil is piggybacked out of the heat exchange medium discharged during the compression of the heat exchange medium by the compressor. The discharged oil is coated on the inner wall of the heat exchange medium passage such as a condenser connected to the discharge port of the compressor, a conduit connecting the condenser and the evaporator, or an expansion valve, or occupies the flow space of the heat exchange medium, thereby reducing the fluidity of the heat exchange medium. The decrease in the fluidity of the heat exchange medium as described above or the coating of oil on the inner wall of the condenser or the evaporator reduces the heat exchange efficiency between the heat exchange medium and the outside air. In addition, when the oil of the compressor circulates through the entire system of the air conditioner, there is a problem in that the amount of oil in the compressor is fluctuated so that the lubrication of the compressor driving unit is not stable and smooth. In order to prevent this, when a relatively large amount of oil is supplied to the compressor, the oil prevents the phase change of the heat exchange medium, thereby reducing the cooling efficiency of the air conditioning system.

In order to solve this problem, the compressor of the air conditioning system for compressing the heat-changing medium which is phase-changed is provided with an oil separator for separating the heat-exchanging medium and oil and returning it to the compressor on the discharge side for compressing and discharging the heat-exchanging medium.

The oil separator is classified into an internal type installed in the compressor and an external type installed on the circuit of the air conditioning system. The external oil separator is separately installed in the discharge pipe connected to the discharge port of the compressor to separate the oil, and the separated oil is connected to the suction pipe connected to the suction port of the compressor by a capillary tube and recovered to the compressor. Such an external type has the advantage of easy installation and securing oil separation performance, but it requires a large installation space, which makes it difficult to install in a narrow engine room.

The built-in external separator is installed inside the compressor main body, an example of which is disclosed in Japanese Patent Laid-Open No. 5-240158.

As shown in FIG. 1, a housing 11 of a compressor having an oil separator includes an oil separation chamber 12 for separating and storing oil from a heat exchange medium discharged from a cylinder bore, and adjacent to the oil separation chamber 12. The oil supply line 13, which is installed so as to be in communication with the oil separation chamber 12, and the oil supply chamber 13, communicates with each other, and the oil pipe line 14 supplies oil from the separation chamber 12 by the pressure difference thereof. Is formed. The housing 11 has a supply path 16 for supplying oil from the oil supply chamber 13 to the crank chamber 15, and the amount of oil flowing into the crank chamber at the inlet side 16a of the supply path 16. Flow control valve 17 for controlling the is installed.

As described above, since the oil separator built in the compressor has a housing 11, an oil separation chamber 12, and an oil supply chamber 13 of the compressor installed side by side, the oil separation chamber 12 and the oil supply chamber 13 may be separated. There is a limit to enlarge, there is a problem that the separation of oil from the heat exchange medium is not made smoothly and the separated oil cannot be stored sufficiently. In particular, when there is little or no oil in the oil supply chamber 13, there is a problem that the heat exchange medium discharged flows into the crank chamber.

The present invention is to solve the above problems, it is possible to improve the separation efficiency of the oil is piggybacked on the heat exchange medium discharged from the compressor, and to provide an oil separator built-in compressor that can improve the cooling efficiency of the separated oil The purpose is.

Another object of the present invention is to increase the cycle and return of the oil to the compressor to smooth the lubrication of the compressor drive, and the oil separation chamber acts as a muffler to reduce the pulsation and noise generated by the operation of the compressor built-in oil separator The purpose is to provide a compressor.

1 is a cross-sectional view showing an oil separator of a conventional compressor,

2 is an exploded perspective view illustrating an oil separator of the compressor according to the present invention;

3 is an enlarged view illustrating an oil separator illustrated in FIG. 2;

4 is a partial cross-sectional view of the housing,

5 is a perspective view showing an extract of the oil separating means shown in FIG.

6 is a perspective view showing another embodiment of an oil separator.

In order to achieve the above object, the oil separator built-in compressor of the present invention includes a housing having a suction or discharge muffler;

A cover member coupled to the housing to form an oil separation chamber having an outlet connected to the inlet and the discharge muffler;

A baffle installed on at least one side of the housing and the cover member to extend a flow path of the heat exchange medium introduced into the inlet;

A gasket interposed between the housing and the cover member to seal them and having an oil return passage for supplying the oil separated by the oil separation chamber to an oil supply passage communicating with the suction muffler;

And at least one oil separation member installed in the oil separation chamber to separate and cool the oil from the heat exchange medium introduced from the inlet.

In the present invention, the oil separation fan member is formed of a plurality of holes are formed through the oil passage portion through which the oil passes and the heat exchange medium passage portion through which the heat exchange medium passes. The oil separation chamber is provided with a collecting partition wall that is inclined toward the collecting portion located below the oil separation chamber to promote recovery of oil.

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

2 and 5 show an embodiment of the oil separator built-in compressor according to the present invention that separates the oil that has been piggybacked on the heat exchange medium that is compressed and discharged from the compressor.

As shown, the oil separator built-in compressor 20 includes a housing 21 in which a suction muffler 21a and a discharge muffler 21b are formed, and an oil separation chamber on a discharge passage combined with the housing 21 and discharged from the compressor. And a cover member 23 forming 22. The housing 21 may be formed in a single structure or may be formed by combining a cylinder, a rear head and a front head. Any structure may be used as long as the structure forms the main body of the compressor.

The inlet port 24a for supplying the heat exchange medium discharged to the housing 21 in which the oil separation chamber 22 is formed and the heat exchange medium from which the oil is separated from the oil separation chamber 22 are discharged to the discharge muffler 21b. An ejection opening 24b is formed. And inside the oil separation chamber 22 is formed on at least one side of the housing 21 and the cover member 23 to lengthen the movement trajectory of the heat exchange medium flowing from the inlet (24a) and outflow to the discharge port (24b) A baffle 25 is formed which serves as an obstacle in the flow field to collect viscous oil. The baffle 25 extends a predetermined length downward from the upper edge of the oil separation chamber 22 between the inlet port 23 and the outlet port 24b. In addition, a separation partition 26 may be formed at a lower portion of the baffle 25 to be spaced apart from the side wall of the oil separation chamber 22 by a predetermined interval and be inclined to smooth the flow of oil recovery. An oil separation means 30 for separating oil from the heat exchange medium introduced through the inlet 24a and cooling the oil is disposed at a side adjacent to the inlet 24a in the flow trace of the heat exchange medium partitioned by the baffle 25. Is installed. As shown in FIGS. 2 to 5, the oil separation means 30 has at least both ends thereof supported by the support means 32 on the side of the baffle 25 and the side of the oil separation chamber 22 corresponding thereto. It consists of one oil separator fin (31).

The oil separator 휜 31 is formed by bending a thin plate in a crank shape, as shown in FIGS. 3 and 5, and the stepped oil separation unit 31a and the oil separation unit 31a are connected stepwise. It consists of a connection part 31b. A plurality of oil passage holes 31c through which oil passes is formed in the oil separator 31a, and a plurality of relatively large heat exchange medium passage holes 31d are formed in the connection part to reduce the passage resistance of the heat exchange medium. .

The supporting means 32 supports both ends of the oil separators 31, and as shown in FIG. 5, the oil separators 31 are disposed on the side surfaces of the baffles 25 and the side walls of the oil separation chambers 22 corresponding thereto. A plurality of protrusions 32a are formed to be paired with predetermined intervals (separated by a thickness substantially equal to the thickness of the oil separator) so that the ends of the two ends thereof are fitted.

Here, the oil separator 31 and the support means for supporting the same are not limited by the above-described embodiments, and of course, various forms are possible. For example, as illustrated in FIG. 6, a wavy or mountain-shaped bent portion 31e having a heat exchange medium passage hole 31d formed between the oil separation units 31a may be formed. In addition, the oil separator may be manufactured by molding a thin plate into a louver type or a corrugated type. The supporting means for supporting the oil separator may include an end portion of the oil separator inserted into a baffle adjacent to an inlet and a side wall of an oil separation chamber corresponding thereto. It can be made by forming an insertion groove.

In addition, a gasket 40 is installed between the housing 21 and the cover member 23 for sealing according to the coupling thereof, and the gasket 40 is provided as a collecting part 22a of the oil separation chamber 22. An oil return passage 41 for supplying the collected oil to the oil supply passage 21c formed in the housing is formed. Here, one side of the oil recovery passage 41 is formed at a side corresponding to the collection portion 22a of the oil separation chamber 22 and the other side is formed to be in communication with the oil supply passage 21c.

Referring to the operation of the oil circulation of the oil separator built-in compressor according to the present invention configured as described above are as follows.

First, when the compressor is driven while the oil necessary for driving the compressor is injected into the crank chamber of the compressor, the oil is piggybacked on the vaporized heat exchange medium in an atomized state to open the inlet 23 communicating with the oil separation chamber 22. It is introduced into the oil separation chamber 22 through.

The oil introduced into the oil separation chamber 22 through the inlet 23 is formed with a relatively long path by the baffle 25 and the oil separation means 30 is installed on the path adjacent to the inlet 24a. Therefore, the separation efficiency of oil from the heat exchange medium can be increased.

In more detail, the heat exchange medium containing the oil flowing through the inlet 24a passes through the oil separator 31 of the oil separation means 30. The heat exchange medium is in a vaporized state, and the heat exchange medium The oil knitted in the medium is attached to the surface of the oil separator 31 due to the viscosity of the oil. In particular, the oil separators 31 are stepped by forming a connection part 31b between both oil separation parts 31a as shown in FIG. 3, and are supported by the support means 40 so as to be spaced apart from each other by a predetermined interval. Therefore, the heat exchange medium passing through this forms a cross flow, and a part of the heat exchange medium passes through the oil passage hole of the oil separation part 31a. Therefore, the contact area between the heat exchange medium and the oil separator 31 becomes relatively wide, and the atomized oil having a relatively high viscosity is attached to the oil separator 31 to be separated from the heat exchange medium. The oil separated as described above and the oil separated by being attached to the inner wall of the oil separation chamber 22 and the surface of the baffle are passed through the oil passage hole 31c of the oil separation unit 31a to separate the oil separation chamber 22. The collection part 22a is gathered.

In addition, the oil which is not separated while passing through the oil separating means 30 and knitted on the heat exchange medium has a U-turn at the edge of the baffle 25 to be discharged. The oil having a high specific gravity is subjected to centrifugal force and separated by being attached to the inner wall of the oil separation chamber 27 or the surface of the divided partition 26. The separated oil flows down the inclined partition bulkhead 26 and is collected into the collecting part 22a. The heat exchange medium from which the oil is separated as described above is discharged to the condenser (not shown) through the connection pipe of the discharge hole 24b and the discharge muffler 21b.

On the other hand, the oil separated from the heat exchange medium and collected in the collecting part 27 is formed in the gasket 40 due to the difference between the discharge pressure acting in the oil separation chamber 22 of the compressor and the suction pressure acting on the suction muffler 21. By re-suctioning into the suction muffler 21a through the oil return path 41 and the oil supply path 21c, it returns to a crank chamber.

As described above, in the oil separator built-in compressor of the present invention, the oil separating means consisting of an oil separator is installed in the flow field of the heat exchange medium in which the atomized oil is piggybacked, thereby increasing the collection force of the relatively viscous oil, and the oil is discharged through the discharge muffler. It can be prevented from flowing to the condenser, connecting pipe, expansion valve, etc., which form an air conditioning system with the outside. This improvement in oil separation power can be solved by fixing the compressor due to the deterioration of lubrication action due to the lack of oil in the crank chamber of the compressor so that the precious oil of oil is made in a short time. In addition, the oil collected by the oil separator can also expect the filter effect of the impurities while passing through the oil through hole of the oil separator.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Claims (4)

A housing having a suction or a muffler; A cover member coupled to the housing and forming an oil separation chamber having an inlet through which the compressed heat exchange medium is introduced and an outlet connected to the discharge muffler; A baffle installed on at least one side of the housing and the cover member to extend a flow path of the heat exchange medium introduced into the inlet; An oil return flow path formed between the housing and the cover member to supply oil separated by the oil separation chamber to an oil supply communicating with the suction muffler; And at least one oil separation separator installed in the oil separation chamber and separating and cooling the oil from the heat exchange medium introduced from the inlet. The method of claim 1, The oil separator has an oil separator built-in compressor, characterized in that a plurality of holes are formed to connect the oil separation portion for separating the oil and the oil separation portion and the connecting portion formed with an oil passing hole formed in a stepped thin plate. The method of claim 1, The oil separator built-in compressor, characterized in that it comprises a separation partition inclined toward the collecting portion located on the lower side of the oil separation chamber to facilitate the recovery of oil in the oil separation chamber. The method of claim 1, And the oil return glass is formed in a gascat interposed between the housing and the cover.