KR20020057009A - Oil separator - Google Patents

Abstract

PURPOSE: An oil separator built in compressor is provided to improve cooling performance of an air conditioning system. CONSTITUTION: An oil separator includes an oil storage chamber(40) formed as a hermetic space by a cover(20) joined to one side of a compressor housing(10) with a refrigerant inlet(12) and a refrigerant outlet(13) and having an inlet(42) fluidically connected with a discharge chamber of the compressor housing and an outlet(43) fluidically connected with the refrigerant outlet of the compressor housing formed on an upper part thereof; an oil separation device(50) having an induction passage fluidically connected with the inlet of the oil storage chamber, a circular separation space flowing refrigerant flowing through the induction passage in tangential direction and rotating and an oil outlet formed to open in tangential direction on one side of an upper part of the circular separation space to separate oil contained in refrigerant; a guiding passage(60) formed on an inside of the cover to guide refrigerant separated from oil in the circular separation space of the oil separation device to be discharged to the outlet of the oil storage chamber; and an oil passage(70) returning oil collected in the oil storage chamber to the refrigerant inlet of the compressor housing.

Description

Oil Separator with Compressor {OIL SEPARATOR}

The present invention relates to an oil separator which separates the lubricating oil contained in the refrigerant circulating in the refrigeration cycle of the air conditioning system and returns it to the suction side of the compressor so that the lubricating oil does not leak to the heat exchanger side. It relates to a built-in oil separator.

As is well known, a refrigeration cycle constituting the air conditioning system includes a compressor for compressing a refrigerant, a condenser for liquefying the compressed refrigerant, an expansion valve for converting the condensed refrigerant into a low temperature low pressure wet saturated vapor state, which is easy to evaporate, and It has a basic configuration of an evaporator that absorbs external heat while changing the refrigerant flowing through the expansion process into a gas state (superheated steam). The air deprived of heat by the evaporator is converted into a low temperature and low humidity state and blown into the room. In this process, the refrigerant changed into a gaseous state is sent to a compressor and compressed.

The compressor discharges the refrigerant gas discharged after the evaporation is completed from the evaporator to a high temperature and high pressure refrigerant gas which is easily liquefied and discharged to the condenser, whereby the refrigerant can circulate the refrigeration cycle.

Such compressors are known in various forms according to the compression method and structure, and swash plate compressors are generally used in automotive air conditioning systems. This swash plate compressor includes front and rear housings; Front and rear cylinders installed in the front housing and the rear housing; A plurality of double head pistons reciprocally installed over the bores of the front and rear cylinders; A drive shaft rotatably installed through the centers of the front and rear housings and the front and rear cylinders; A swash plate installed at an angle to the drive shaft to advance and retract the pistons as the drive shaft rotates; And, it comprises a valve unit which is respectively installed between the front, rear cylinder and the inner surface of the front, rear housing.

In the compressor configured as described above, when the power of the engine is transmitted to the drive shaft, the pistons move forward and backward by the swash plate rotating together with the drive shaft to perform suction, compression, and discharge of the refrigerant through the valve unit.

On the other hand, in the automotive air conditioning system employing the compressor as described above, by lubricating the mechanical friction surfaces of the compressor drive part by circulating the refrigerant for lubrication purpose to smooth the drive of the compressor in the refrigerant. At this time, when the lubricating oil contained in the refrigerant flows into the condenser and / or the evaporator or the expansion device, the lubricating oil is coated on the inner wall of the refrigerant flow path such as the heat exchanger or occupies the space of the refrigerant flow path of the heat exchanger. This lowers the heat exchange efficiency of the heat exchanger. In addition, when the lubricating oil is circulated through the entire air conditioning system, severe fluctuations occur in the amount of oil supplied to the compressor, and thus the durability of the compressor is lowered because the lubrication of the compressor is not reliably and smoothly performed. Therefore, it is necessary to prevent the lubrication oil contained in the refrigerant from leaking to other components except the compressor. The oil separator separates the lubricating oil contained in the refrigerant discharged from the compressor and returns it to the suction side of the compressor, thereby preventing the efficiency of the heat exchanger caused by the lubricating oil flowing out to the heat exchanger side and lubricating the compressor stably. do.

These oil separators are largely classified into external type and internal compressor type. External oil separator, the inlet port is connected to the discharge line of the compressor, the outlet port is connected to the inlet end of the condenser, the internal oil reservoir and the compressor suction line is connected through the capillary tube (capillary tube) Has The refrigerant containing the lubricating oil discharged from the compressor is introduced into the oil separator through the inlet port of the oil separator, where the refrigerant and the lubricating oil are separated from each other. The refrigerant is supplied to the condenser through the outlet port of the oil separator, and the lubricating oil is stored in the oil reservoir of the oil separator, and then supplied to the compressor suction line through the capillary tube and flows into the compressor together with the refrigerant discharged from the evaporator. do. Therefore, the lubricating oil can be prevented from flowing out to the heat exchanger such as a condenser or evaporator while being mixed with the refrigerant.

However, the external oil separator as described above has the advantage that the manufacturing and design is relatively easy and the oil separation efficiency is good, but it takes up a large installation space such as being installed separately from the compressor and a separate bypass circuit is required. There is this.

Proposed in consideration of the problems with the external oil separator as described above is a compressor built-in oil separator is configured integrally with the compressor. As a representative of such a compressor-type oil separator, there is Japanese Patent Laid-Open No. 11-93880. It is configured to separate the lubricating oil from the refrigerant by centrifugal force and return the lubricating oil separated in this way and collected in the oil reservoir to the suction side of the compressor through the oil passage formed in the gasket and the fine hole formed in the rear of the compressor housing.

The effect of the air conditioner system by the oil separator is known to have the additional effect of noise reduction in addition to the increase in cooling performance, increased compressor durability and reduced oil filling amount.

In particular, the cooling performance of the air conditioning system according to the oil separation is generally the system oil circulation rate (Oil in circulation: oil flow rate / (refrigerant flow rate + oil flow rate) wt%, where the oil circulation rate measurement is the liquid between the condenser and the expansion valve) It is known that the smaller the measured in the refrigerant line, i.e., the smaller the amount of lubricating oil flowing to the heat exchanger side, the greater the heat transfer of the heat exchanger. However, this is a phenomenon that occurs when the oil circulation rate is lowered to a certain level. When the oil circulation rate is lowered below a certain level, the experimental results show that the heat transfer phenomenon in the condenser and the evaporator is reversed and lowers the cooling performance.

This phenomenon is described in detail with reference to FIGS. 1A and 1B as follows. FIG. 1A illustrates the air side heat dissipation of the condenser relative to the oil circulation rate in terms of wt% of the oil contained in the refrigerant circulating in the vehicle air conditioning system, and FIG. 1B shows the air side heat dissipation of the evaporator compared to the oil circulation rate. In the figure, the horizontal axis represents oil circulation rate, and the vertical axis represents condenser air side heat dissipation and evaporator air side heat dissipation.

As shown in the figure, as the oil circulation rate is gradually lowered, the condenser air side heat dissipation amount or the evaporator air side heat dissipation amount is proportionally increased up to a certain level (oil circulation rate is about 4 wt%). However, it can be seen that when the oil circulation rate is lowered to about 4 wt% or less, the increase in the condenser air side heat dissipation is slowed, and the evaporator air side heat dissipation decreases. That is, when the oil circulation rate is too low, it was found that the cooling efficiency is lowered because the evaporator's continuous transfer efficiency is reduced.

This phenomenon is particularly severe when the amount of refrigerant flowing through the air conditioning system is low due to idle driving or low speed driving of the vehicle, which can be explained as follows with regard to heat transfer. The refrigerant-side heat transfer in the evaporator is performed in an abnormal state in which both the gaseous phase and the liquid phase refrigerant exist at the same time. As the heat transfer proceeds, the refrigerant changes from the liquid phase to the gas phase. The closer to the outlet side of the evaporator, the closer the refrigerant is to complete vaporization, and the heat transfer from the refrigerant to the wall depends on the conduction of the refrigerant gas. At this time, when oil flows on the wall surface, convective heat transfer and conduction heat transfer occur simultaneously by a slip between the oil and the refrigerant gas, thereby facilitating heat transfer. However, when the thickness of the oil film is above a certain level, the oil acts as a heat resistance, thereby reducing the cooling performance. Therefore, in order to continuously obtain high cooling performance irrespective of the driving conditions of the vehicle, it is necessary to prevent the oil from being excessively separated during low speed operation, that is, when the refrigerant flow rate is low.

However, conventionally known oil separators with built-in compressors are configured to separate oil from the refrigerant as completely as possible based on the simple theory that the oil circulation rate should be lowered without any consideration of the above. Oil circulation rate is too low during idle operation, causing a problem that the cooling performance is sharply lowered.

In addition, since the conventional oil separator having a built-in compressor has a small capacity of the oil storage chamber, when the oil is exceeded, the oil separated by the refrigerant flowing at high speed flows out together with the refrigerant. Oil separation is no longer performed, there is a problem that the size of the compressor must be increased in order to increase the capacity of the oil reservoir.

The present invention has been made in view of the above, and in low-speed operation, such as during specific driving conditions of the vehicle, lubricating oil contained in the refrigerant is not excessively separated so that the oil circulation rate is not too low. It is an object of the present invention to provide an oil separator with a compressor that can improve the cooling performance of the system.

Another object of the present invention, by improving the structure to use most of the space of the oil separation chamber as an oil storage chamber by minimizing the size of the compressor while maximizing the capacity of the oil storage chamber compressor built-in oil separator that can increase the oil separation efficiency To provide.

Figure 1a is a graph showing the relationship between the oil circulation rate versus the heat discharge amount of the condenser air in a typical vehicle air conditioning system,

Figure 1b is a graph showing the relationship between the oil circulation rate versus the evaporator air side heat radiation in a typical vehicle air conditioning system,

Figure 2 is an exploded perspective view showing the structure of the compressor built-in oil separator according to an embodiment of the present invention,

3 is an assembled cross-sectional view of FIG.

Figure 4 is a rear view of the compressor housing showing the oil reservoir and the oil separating means formed in the compressor housing of the compressor built-in oil separator according to an embodiment of the present invention,

Figure 5 is a front view of the cover showing the oil reservoir and the guide flow path formed in the cover of the compressor-mounted oil separator according to an embodiment of the present invention, and

6 is a front view of a gasket used in the oil separator of the compressor according to the embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10; compressor housing 11; discharge chamber

12; refrigerant inlet 13; refrigerant outlet

20; cover 30; gasket

31; blocking portion 31a; refrigerant communication hole

31b; outflow communication hole 31c, 31d; oil storage communication hole

40; oil storage chamber 42; inlet

43; outlet 50; oil separation means

51; introduction path 52; circular separation space

53; oil outlet 60; guide euro

61; first space 62; second space

63; communication path 70; oil euro

71; oil supply passage 72; oil recovery passage

Compressor built-in oil separator according to the present invention for achieving the above object is formed into a predetermined closed space by a cover coupled to one side of the compressor housing having a refrigerant inlet and a refrigerant outlet, the discharge chamber of the compressor housing on the upper side and An oil storage chamber each having an inlet communicating therewith and an outlet communicating with the refrigerant outlet of the compressor housing; An introduction passage formed to communicate with an inlet of the oil storage chamber, and having a circular separation space for circulating the refrigerant flowing along the introduction passage in a tangential direction, and an oil outlet configured to open in a tangential direction at an upper side of the circular separation space. Oil separation means for separating lubricating oil contained in the refrigerant; A guide passage formed inside the cover to guide the refrigerant from which the lubricating oil is separated and removed in the circular separation space of the oil separation means to be discharged toward the outlet of the oil storage chamber; And an oil flow path for returning the lubricating oil collected in the oil storage chamber to the refrigerant intake side of the compressor housing.

The oil reservoir may be formed by combining the first concave portion formed in the back of the compressor housing to a predetermined depth and the second concave portion formed in the shape corresponding to the first concave portion of the compressor housing on the inner surface of the cover.

In addition, the guide passage is a communication path for communicating the first space portion corresponding to the inlet of the oil reservoir, the second space portion corresponding to the circular separation space of the oil separation means, and the outlet of the second space portion and the oil reservoir. Equipped.

In addition, according to a preferred embodiment of the present invention, a gasket for airtightness is interposed between the coupling surface of the compressor housing and the cover. The gasket is provided at its upper side with a blocking portion having a refrigerant outlet hole, an outlet communication hole and at least one oil storage compartment communication hole for communicating the circular separation space of the oil separation means and the second space portion of the refrigerant guide flow path.

In addition, several first protrusions for supporting the edge of the refrigerant outlet hole formed in the gasket are circularly disposed in the circular separation space of the oil separating means, and the several first protrusions are provided in the second space portion of the refrigerant guide passage. Several second protrusions are arranged to press and close the refrigerant outlet hole edge of the gasket supported by the gasket, and the third and fourth protrusions of the same purpose are disposed between the circular separation space forming wall of the oil reservoir and the outlet. And it may be disposed in each of the communication path of the refrigerant guide passage.

In addition, the oil flow path is an oil supply passage formed to communicate with the refrigerant suction port on one side of the rear wall of the compressor housing; And an oil return passage communicating the oil reservoir and the oil supply passage to return the lubricated oil stored in the oil reservoir to the refrigerant inlet of the compressor housing. In this case, the oil return passage may be formed in a concave upward direction along the rear wall edge of the compressor housing, and may be formed in the upward direction along one side edge of the gasket.

Compressor built-in oil separator according to the present invention configured as described above, the specific gravity of the refrigerant containing the lubricating oil flowing into the circular separation space of the oil separation means through the inlet of the oil storage chamber by rotating in the circular separation space by the flow rate This large lubricating oil is separated from the refrigerant. The separated lubricating oil is discharged to the oil storage chamber through an oil outlet formed at the upper side of the circular separation space, and the refrigerant from which the lubricating oil is removed is guided to the outlet by the refrigerant guide passage and flows out. At this time, when a large amount of refrigerant circulates the air conditioning system, for example, during a high-speed operation of the vehicle, the rotation of the refrigerant in the circular separation space is actively progressed, and a normal oil separation action is performed, and a small amount of refrigerant circulates the air conditioning system. For example, during low-speed driving of a vehicle such as idle driving, while the turning motion of the refrigerant in the circular separation space is slowed down, the oil is not separated and flows out together with the refrigerant to the outlet. Therefore, it is possible to prevent the cooling performance from being lowered because the oil circulation rate becomes too low during low speed operation.

The above objects and features of the present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view showing the structure of the compressor built-in oil separator according to an embodiment of the present invention, Figure 3 is an assembled cross-sectional view of Figure 2, Figure 4 is a compressor housing of the built-in oil separator according to an embodiment of the present invention 5 is a rear view of the compressor housing showing the oil reservoir and the oil separating means being formed, and FIG. 5 is a front view of the cover of the oil reservoir and the guide passage formed in the cover of the oil separator of the compressor according to the embodiment of the present invention, and 6 is a front view of a gasket used in the oil separator of the compressor according to the embodiment of the present invention.

In the drawings, reference numeral 10 is a compressor housing, 20 is a cover, 30 is a gasket, 40 is an oil reservoir, 50 is an oil separating means, 60 is a guide flow, and 70 is an oil flow path.

As shown, the compressor housing 10 is provided with a discharge chamber 11 in front of it. In addition, the upper surface of the compressor housing 10, the refrigerant inlet 12 and the refrigerant outlet 13 is partitioned side by side before and after.

The cover 20 is coupled to the rear of the compressor housing 10 to define a predetermined enclosed space (ie, the oil reservoir 40), and the gasket 30 is connected to the compressor housing 10 and the cover 20. Interposed therebetween to maintain the airtightness of the mating surface. These compressor housings 10, covers 20 and gaskets 30 are bolts (not shown) which are fastened through several fixing holes 15, 25 and 35 formed to correspond to each other along their edges. Is assembled on.

The oil storage chamber 40 includes a first recessed part 40a formed at a predetermined depth on the rear surface of the compressor housing 10 and a recessed shape corresponding to the first recessed part 40a at the cover 20. The second concave portion 40b is formed, and the cover 20 is provided in a predetermined closed space by being coupled to the rear surface of the compressor housing 10 under the interposition of the gasket 30. One side of the first concave portion (40a) is provided with an inlet (42) formed in communication with the discharge chamber 11 of the compressor housing 10, the other side of the refrigerant discharge port 13 of the compressor housing (10) Is provided to communicate with the outlet (43). Here, the outlet 43 is disposed to be located above the height of the inlet 42. Meanwhile, in the drawing, the oil storage chamber 40 is an example in which the first concave portion 40a formed in the compressor housing 10 and the second concave portion 40b formed in the cover 20 are joined together. Although not shown, the present invention is not limited thereto, but the oil storage chamber 40 may be configured by only the first concave portion 40a formed in the compressor housing 10.

The oil separating means 50 has an introduction passage 51 formed so as to communicate with the inlet 42 of the oil storage chamber 40 and a circular shape in which the refrigerant flowing along the introduction passage 51 flows in a tangential direction and pivots. The separation space 52, and the oil discharge port 53 formed to open in a tangential direction on the upper side of the circular separation space 52. The refrigerant flowing into the oil storage chamber 40 through the inlet 42 is introduced into the circular separation space 52 in a tangential direction through the introduction passage 51. In this way, the refrigerant flowing into the circular separation space 52 is swiveled in the circular separation space 52 by the flow rate, whereby the lubricating oil having a large specific gravity contained in the refrigerant is separated from the refrigerant. The separated lubricating oil is discharged and stored in the oil storage chamber 40 through the oil outlet 53, and the refrigerant from which the oil is removed is guided by the refrigerant guide passage 60, which will be described later, and the outlet 43 of the oil storage chamber 40. Is discharged through). Here, since the oil outlet 53 is located on the upper side of the circular separation space 52, the oil storage chamber can be utilized to the maximum, and the flow rate and flow rate of the refrigerant can be achieved by idle driving and low speed operation of the vehicle. When this is small, the oil does not reach the oil outlet 53 while the rotational movement of the refrigerant in the circular separation space 52 is slowed down, and thus oil separation is not performed. Therefore, since the oil circulation rate at low speed can be improved, the cooling performance at low speed can be improved.

The guide passage 60 serves to guide the refrigerant from which the lubricating oil is separated and removed from the circular separation space 52 of the oil separation means 50 toward the outlet 43. The guide flow path 60 is formed in the second concave portion 40b of the cover 20, and corresponds to the first space 61 and the circular separation space 52 corresponding to the inlet 42. The 2nd space part 62 and the communication path 63 which communicates this 2nd space part 62 and the said outlet port 43 are provided. The refrigerant from which the lubricating oil is separated and removed from the circular separation space 52 of the oil separation means 50 is discharged to the outlet 43 through the communication path 63 with the second space part 62. Here, the refrigerant containing the lubricating oil at low speed is also discharged to the outlet through the above process.

The oil passage 70 is a flow path for returning the lubricating oil collected in the lower portion of the oil storage chamber 40 to the refrigerant suction opening 12 of the compressor housing 10, and communicates with the refrigerant suction opening 12. An oil supply passage 71 formed in 10) and an oil recovery passage 72 for communicating the oil supply passage 71 and the lower portion of the oil storage chamber 40 are communicated with each other. The oil recovery passage 72 is formed to cut upward along one edge of the gasket 30, and the flow path is limited by the cover 20. The lubricating oil collected in the oil storage chamber 40 when the compressor is driven is transferred to the refrigerant inlet 12 through the oil recovery passage 72 and the oil supply passage 71 due to the pressure difference between the oil storage chamber 40 and the refrigerant intake side. Will flow). On the other hand, the drawing shows an example in which the oil recovery channel 72 is formed in the gasket 30, but is not necessarily limited thereto, the oil recovery channel 72 along the rear wall edge of the compressor housing (10) It may be formed in the concave upward direction, in this case, the flow path is limited by the gasket 30 and the cover 20 coupled to the compressor housing 20. Such an oil return path has an advantage that the cross-sectional area thereof can be made larger than that of the flow path formed in the gasket.

Meanwhile, the gasket 30 constituting the oil separator of the compressor according to the present invention has a predetermined shape to block the upper sections of the first and second concave portions 40a and 40b constituting the oil storage chamber 40. The unit 31 is provided integrally. Refrigerant for smoothly discharging the refrigerant by communicating the circular separation space 52 and the second space portion 62 in a portion where the circular separation space 52 and the second space portion 62 are in contact with the blocking portion 31. An outlet hole 31a is formed, and an outlet communication hole 31b is formed at a portion corresponding to the outlet 43 of the oil storage chamber 40, and the first and second recesses 40a and 40b are formed. By communicating, two oil storage chamber communication holes 31c and 31d are formed in place to prevent the oil storage capacity from decreasing due to the refrigerant gas being filled in the sealed space. Here, in the illustrated example, two oil storage chamber communication holes are formed, but not necessarily limited thereto, the oil storage chamber communication hole is formed when one or more can achieve the desired purpose.

In the circular separation space 52, several first support protrusions 52a protrude from the edges of the refrigerant outlet hole 31a formed in the gasket 30, and the second space part 62 is disposed. Several second support protrusions 62a protrude from the edges of the refrigerant outlet holes 31a of the gasket 30 supported by the first support protrusions 52a. In addition, the third supporting protrusions 52b and the fourth supporting protrusions 62b of the same purpose are connected between the circular separation space forming wall of the oil storage chamber 40 and the outlet 43 and the communication of the guide passage 60. It protrudes into the furnace 63, respectively.

Hereinafter, the operation of the compressor built-in oil separator according to the present invention configured as described above will be described.

The refrigerant discharged from the evaporator during the circulation of the refrigerant according to the operation of the air conditioning system flows into the compressor suction chamber through the refrigerant suction opening 12, is compressed, and then discharged into the discharge chamber 11. The lubricating oil collected in the lower part of the oil storage chamber 40 during the compression of the refrigerant is passed through the oil recovery passage 72 and the oil supply passage 71 by the pressure difference between the refrigerant inlet side and the oil storage chamber 40. It flows to the bottom of the refrigerant suction port 12 and flows back to the compressor suction side together with the refrigerant flowing from the evaporator side. Compressed mixed refrigerant gas containing the lubricated oil discharged into the discharge chamber 11 is introduced into the circular separation space 52 in the tangential direction through the inlet 42 and the introduction passage 51 of the oil storage chamber (40).

At this time, when a refrigerant having a normal flow rate, that is, a high flow rate of refrigerant flows, the refrigerant moves actively in the circular separation space 52 by the flow rate, and thus, a lubricating oil having a specific gravity higher than that of the refrigerant. This is separated. The separated lubricating oil is discharged and stored in the oil storage chamber 40 through the oil outlet 53 formed in the tangential direction on the upper side of the circular separation space 52, and the refrigerant from which the oil is separated and removed is the circular separation space 52. ) Is discharged to the outlet 43 along the refrigerant communication hole 31a formed in the blocking portion 31 of the gasket 30, the second space portion 62 of the guide passage 60, and the communication path 63. That is, while the normal oil separation action is actively performed to separate the lubricating oil contained in the refrigerant.

On the other hand, during idle operation or low speed operation, the flow rate of the refrigerant circulating in the air conditioning system is reduced, and therefore, the flow rate of the refrigerant flowing through the inlet port 42 of the oil storage chamber 40 is reduced. In such a case, since the flow velocity of the refrigerant is small, the rotational movement of the refrigerant flowing into the circular separation space 52 through the introduction path 51 is slowed down, whereby the oil is not separated and the oil is separated from the circular separation space. Since the oil outlet 53 is not reached at the upper side of the 52, the oil is discharged to the outlet 43 as it is through the above process with the refrigerant. That is, since the refrigerant is discharged to the refrigerant discharge port 13 through the outlet port 43 in the state that the lubrication oil is not removed, in this case, the oil circulation rate is not too low, and therefore, the oil circulation rate at low speed operation of the vehicle By lowering this too much, it can prevent that cooling performance falls.

According to the present invention as described above, under the high speed driving conditions of the vehicle, since a large amount of refrigerant flows into the oil separation means through the inlet of the oil storage compartment at high speed, the normal oil separation action is performed, and thus the oil circulation rate can be lowered. Cooling performance can be improved, and since a small amount of refrigerant flows into the oil separation means through the inlet of the oil storage chamber at a low speed in a low speed driving condition such as during idle operation, the oil does not separate and flows out together with the refrigerant. do. Therefore, since the oil circulation rate does not become too low at low speeds, the cooling performance can be prevented from falling at low speeds. That is, according to the present invention, it is possible to maintain a high cooling performance of the air conditioning system under any driving conditions of the vehicle.

In addition, according to the oil separator of the compressor according to the present invention, since the oil outlet is located at the upper side of the circular separation space, the space of the oil storage compartment can be maximized compared to the same compressor size, without increasing the size of the compressor. The oil separation efficiency can be maximized.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described claims, and is generally used in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art can make various modifications, as well as such modifications that fall within the scope of the claims.

Claims (8)

The cover is coupled to one side of the compressor housing having a refrigerant inlet and a refrigerant outlet, and is formed in a predetermined closed space. An inlet communicating with the discharge chamber of the compressor housing and an outlet communicating with the refrigerant outlet of the compressor housing are provided on the upper side. Oil storage chambers each provided; An introduction passage formed to communicate with an inlet of the oil storage chamber, and having a circular separation space in which the refrigerant flowing along the introduction passage flows in a tangential direction and pivoting therein, and an oil outlet formed so as to open in a tangential direction on an upper side of the circular separation space. Oil separation means for separating the oil contained in the refrigerant by; A guide passage formed inside the cover to guide the refrigerant from which the lubricating oil is separated and removed in the circular separation space of the oil separation means to be discharged toward the outlet of the oil storage chamber; And And an oil passage for returning the lubricated oil collected in the oil storage chamber to the refrigerant inlet side of the compressor housing. The method of claim 1, The oil reservoir is characterized in that the first concave portion is formed in the back of the compressor housing to a predetermined depth and the second concave portion formed in the shape corresponding to the first concave portion on the inner surface of the cover Oil separator with built-in compressor. The method of claim 1, The guide passage communicates a first space portion corresponding to the inlet of the oil storage chamber, a second space portion corresponding to the circular separation space of the oil separating means, and communication between the second space portion and the outlet of the oil storage chamber. Compressor built-in oil separator, characterized in that provided with a furnace. The method of claim 3, wherein A gasket for airtightness is interposed between the coupling surface of the compressor housing and the cover, and the gasket includes a refrigerant outlet hole, an outlet communication hole, which communicates the circular separation space and the second space part of the refrigerant guide passage at an upper side thereof. Compressor built-in oil separator, characterized in that provided with a block having at least one oil reservoir communication hole. The method of claim 4, wherein Inside the circular separation space, several first protrusions for supporting the edge of the refrigerant outlet hole formed in the gasket are disposed in a circular shape, and the second space portion of the refrigerant guide passage is supported by the several first protrusions. Several second protrusions are disposed to press and close the edge of the refrigerant outlet hole of the gasket, and the third and fourth protrusions of the same purpose are provided between the circular separation space forming wall of the oil storage chamber and the outlet and Compressor built-in oil separator, characterized in that arranged in the communication path of the refrigerant guide oil. The method of claim 1, An oil supply passage formed on one side of a rear wall of the compressor housing to communicate with the refrigerant suction opening; And And an oil recovery line for communicating the oil reservoir and the oil supply passage to return the lubricated oil stored in the oil reservoir to the refrigerant inlet of the compressor housing. The method of claim 6, The oil return passage is formed in a concave upward direction along the rear wall edge of the compressor housing, characterized in that the flow path is limited by the gasket and the cover is a built-in compressor oil separator. The method of claim 6, The oil recovery path is formed by cutting upwards along one side edge of the gasket, and the oil separator is built-in oil separator, characterized in that the flow path is limited by the cover.