KR20000061791A - Oil separator - Google Patents

Abstract

PURPOSE: An oil separator is provided to achieve an improved effectiveness of heat exchange and reduced noise and size. CONSTITUTION: An oil separator comprises an oil separation cylinder(1) having at an interior of a lower end thereof an oil storage chamber(16), an oil outlet(15) arranged at a center of the lower end of the cylinder in such a manner as to be connected to a capillary tube(4), the oil separation cylinder having at both sides of a lid(12) a refrigerant inlet pipe(2) and a refrigerant outlet pipe(3); an inlet mesh(5) having a top portion coupled to a lower end of the refrigerant inlet pipe within the oil separation cylinder, and a baffle(6) selected from a group consisting of one which is extended downward from the lid so as to shut off the inlet mesh from a lower extended portion of the refrigerant outlet pipe and guide the refrigerant flow in U-shape and which has an upwardly retracted lower center, one which has a lower end protruded downwardly in arc-shape, one which is corrugated by alternating groove portions and protruded portions in lengthwise direction, one which is shaped as a pectination by having groove portions and protruded portions alternating slantly from a vertical center toward both ends thereof, one which has a lower end thereof bent toward the inlet mesh, and one which has at a lower end portion thereof a plurality of penetrating holes.

Description

Oil Separator {OIL SEPARATOR}

The present invention relates to, for example, an oil separator installed in a compressor discharge line of an air conditioner. In particular, the oil separation efficiency can be improved by a simple shape and a characteristic shape of a baffle that forms a flow path of oil in a U shape. In addition, the present invention relates to an oil separator capable of improving cooling performance and durability in a cooling system of an air conditioner and further reducing noise.

As shown in FIG. 10, the air conditioner includes a compressor 91 for adiabatic compression of a low temperature low pressure gas refrigerant to form a high temperature high pressure gas refrigerant, and a high temperature high pressure gas refrigerant discharged from the compressor 91. A condenser 92 for making a saturated liquid state by heat exchange, an expansion valve 93 for making a refrigerant liquefied and conveyed from the condenser 92 into a low-pressure saturated wet steam state, and from the expansion valve 93 It comprises an evaporator 94 to send the refrigerant to the compressor (91) to evaporate by the heat exchange to the saturated steam state. Reference numeral 95 denotes a receiver drier. In this air conditioner, the oil for smoothly driving the compressor 91 is used in a state in which the refrigerant is mixed with the refrigerant. When the oil mixed in the refrigerant flows into a heat exchanger such as the condenser 92, the heat transfer rate decreases. In addition, since the pressure drop is severely generated, the oil separator 96 is used to prevent the inflow of oil into the heat exchanger and to improve the durability of the compressor 91 and to reduce noise and vibration.

The oil separator can be roughly classified into a compressor oil separator and a compressor discharge line oil separator. In the case of the compressor discharge line oil separator 96 as shown in FIG. 10, the inlet end is connected to the compressor 91 outlet end, the outlet end is connected to the inlet end of the condenser 92, and the oil separator 96. ) Oil storage chamber is connected to the inlet line of the compressor (91) through the capillary tube (capillary tube) (97). Therefore, the high temperature and high pressure refrigerant gas discharged through the outlet end of the compressor 91 and the oil in the liquid state flow into the oil separator 96 through the inlet end of the oil separator 96, and the refrigerant inside the oil separator. The gas and the liquid oil are separated from each other, and the refrigerant gas is transferred to the condenser 92 through the outlet end of the oil separator 96. The separated oil is once stored in the oil reservoir of the oil separator 96 and then the capillary tube ( Through 97), it is supplied to the compressor 91 inlet line and returned to the inside of the compressor 91 to prevent oil from being introduced into a heat exchanger such as a condenser or an evaporator while being mixed with a refrigerant. The oil bypass circuit using the capillary tube 97 is for supplying an appropriate amount of oil to the compressor 91. Since the lack of oil supply to the compressor adversely affects the lubrication of the compressor, the oil separator 96 is used. It is desirable to store a certain amount of oil in the oil storage room at all times, so it should be possible to store enough oil in the oil storage room.

As the compressor discharge line oil separator as described above, those disclosed in Japanese Patent Laid-Open No. 9-187617 are conventionally exemplified. This oil separator has a double cylinder structure, has a plurality of holes on the main surface of the inner cylinder, the first network is installed in the inner cylinder and the second network covering the gas outlet installed on the main surface of the outer cylinder. In addition, the oil separator of this structure is not only a lot of components such as the outer cylinder, inner cylinder, the first network, the second network, but also complicated in structure. In addition, between the first network where the oil is separated and the second network covering the gas outlet is connected to the empty space, and the oil separated from the first network is scattered toward the outer circumferential surface of the outer cylinder so that the flow rate is large, the gas outlet installed on the outer circumferential surface Some oil escapes through the oil separation efficiency. In addition, if some of the oil droplets separated from the first network are attracted by the flow and collide with the second network covering the gas outlet of the outer cylinder, if the flow velocity is small, the flow falls downward due to gravity, but the flow velocity is large. Is drawn into the gas outlet and attracted to the surrounding oil, and the oil flows out through the gas outlet to increase the amount of oil flowing into the heat exchanger. Therefore, a certain amount of oil is supplied to the oil storage chamber, that is, sufficient oil for lubrication of the compressor. Another problem is that it is difficult to store.

In consideration of this problem, as shown in FIG. 9, an oil outlet 73 connected to the capillary tube 74 is formed at an inner side of the lower end with an oil storage chamber 71 and a refrigerant inlet on both sides of the upper surface. An oil separator (7) connected to the pipe (75) and the refrigerant outlet pipe (76), and an inlet network (77) extending downward supported by the end of the refrigerant inlet pipe (75) inside the oil separator (7); Is supported by the end of the refrigerant outlet pipe 76 in the oil separation container (1) and is installed to block the outlet network 78 extending downward, and between the inlet network 77 and the outlet network (78) An oil separator has been proposed that includes a baffle 79 formed in a substantially rectangular shape that guides the flow of refrigerant in a U-shape.

According to the oil separator configured as described above, the mixed gas of the high temperature and high pressure gaseous refrigerant discharged from the compressor and the liquid oil contained in the refrigerant is introduced into the inlet network 77 through the refrigerant inlet pipe 75. The mixed gas introduced into the inlet net 77 is scattered by the inlet net 77 to the inner wall surface of the oil separation container 7 and the surface of the inlet net 77 of the baffle 79. Then, the oil falls on the inner wall surface of the oil separation vessel 7 and the surface of the inlet network 77 of the baffle 79 to the oil storage chamber 71 and the refrigerant passes through the bottom of the baffle 79 to the outlet network 78. And oil may be separated by flowing into the condenser through the refrigerant outlet pipe 76.

However, in the conventional oil separator as described above, as a result of the flow visualization test, it was found that the outlet network 78 may cause adverse effects under specific conditions in separating oil. That is, when the flow rate of the refrigerant is large, the oil flowing down the surface of the inlet network 77 side of the baffle 79 is formed at the lower end of the baffle 79 so that oil droplets are formed. By drawing a parabola together with the refrigerant to be blown toward the outlet network 78 to spread through the outlet network 78 to act as a resistance when the refrigerant is passed through the outlet network 78 and discharged through the refrigerant outlet pipe 76. . Accordingly, when the refrigerant is discharged, the oil is scattered to the inside of the outlet network 78, and the scattered oil is discharged together with the refrigerant through the refrigerant outlet pipe 76. In addition, among the oil droplets scattered inside the outlet network 78, the bulky oil droplets fall by gravity, but the flow rate of the flow refrigerant flows in the process in which the oil dropped by gravity hits and scatters at the lower end of the outlet network 78. As the process of being drawn back to the inside of the outlet network 78 and being scattered and discharged together with the refrigerant is repeated, noise and vibration are greatly generated, and the oil storage chamber 71 stores a sufficient amount of oil necessary for lubrication of the compressor. Difficult to do In addition, in the above-described conventional oil separator, since the diameter and the appearance of the refrigerant inlet pipe 75 and the refrigerant outlet pipe 76 are the same, there is a problem of incorrect assembly with each other.

On the other hand, the oil separation performance of the oil separator is generally affected by the volume of the oil reservoir of the oil separator. That is, if the volume of the oil storage chamber is small, if the flow rate of the refrigerant during oil separation is large, the surface particles of the oil stored in the oil storage chamber flow, and the oil tends to be drawn out by the refrigerant along with the flow of the refrigerant, but the internal volume of the oil storage chamber is large. In this case, the flow rate of the refrigerant in the oil separator is lower than that of the former, so that the flow phenomenon of the surface particles of the storage oil is reduced, which prevents the oil from being drawn out together with the refrigerant and is discharged together with the refrigerant. Separation of oil can also be made easily. The volume of such an oil reservoir should be determined in consideration of the relationship with the filling amount of oil stored in the oil reservoir. That is, the volume ratio of the oil storage chamber represents the ratio of the volume of the oil storage chamber to the total oil filling amount of the system. For example, 60% of the oil storage chamber can store 60% of the total oil charge in the oil separator and the remaining 40% of the oil can be present in the compressor, hose, pipe, heat exchanger, and the like. If there is a lot of oil in the compressor when the system is operating, the volume of the oil reservoir is not a problem even if it is set small.However, if a large amount of oil is temporarily discharged from the compressor, if the oil reservoir is full, the oil will flow to the heat exchanger side. The coating causes poor heat exchange efficiency. Even if oil flows temporarily to the heat exchanger side, it takes a long time for the coated oil to be returned to the compressor. Thus, there is a need for an oil reservoir of adequate capacity that can cope with the operating conditions of the system. As the volume ratio of the oil storage room increases, the oil separation performance and cooling performance increase together.In general, when the volume ratio is 30% or less, the oil separation performance and cooling performance rapidly decrease, and when the volume ratio is 70% or more, the volume ratio increases. As the increase in performance is minimal, the volume ratio of the oil storage type is preferably set to 30-70%, and it is important to obtain a small and proper performance.

However, in the conventional oil separator as described above, since the baffle 79 is formed in a simple rectangular structure, the distance to the oil surface stored in the oil storage chamber 71 cannot be made smaller than the limit. In order to supply a sufficient amount of oil from the oil storage chamber 71 to the compressor due to the large amount of oil discharged, the oil separator must be large in size, so it is difficult to make the oil separator small in size.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and provides a compressor discharge line oil separator which can not only increase oil separation performance, but also reduce noise, and also allow compaction of the oil separator. The purpose.

1 is a cross-sectional view showing an oil separator according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a front view showing a first embodiment of the baffle constituting the oil separator according to the present invention.

Figure 4 is a front view showing a second embodiment of the baffle constituting the oil separator according to the present invention.

5 is a perspective view showing a third embodiment of the baffle constituting the oil separator according to the present invention.

6 is a perspective view showing a fourth embodiment of the baffle constituting the oil separator according to the present invention.

7 is a front view showing a fifth embodiment of the baffle constituting the oil separator according to the present invention.

8 is a sectional view showing an oil separator according to the present invention with a baffle according to the fifth embodiment.

9 is a cross-sectional view showing an example of a conventional oil separator.

10 is a configuration diagram showing an example of a general air conditioner.

<Explanation of symbols for main parts of drawing>

1: oil separator, 2: refrigerant inlet pipe,

3: refrigerant outlet pipe, 4: capillary tube,

5: entrance network, 6: baffle,

12: cover, 13, 14: through hole,

15: oil outlet, 16: oil reservoir,

21: expansion tube, 22: shaft tube,

51: junction part, 61: indentation part,

62: protrusion, 63, 65: groove,

64, 66: projection, 67: through hole,

68: bend

In order to achieve the above object, the present invention, the oil outlet is formed inside the lower end of the oil reservoir and connected to the capillary tube in the lower center and the oil inlet and the refrigerant inlet pipe connected to the refrigerant inlet pipe on both sides of the upper cover Pass; An inlet network having an upper end coupled to a lower end of a refrigerant inlet pipe in the oil separation vessel; It extends downward from the cover by a predetermined length so as to cut off between the inlet network and the lower extension portion of the refrigerant outlet pipe to guide the flow of the refrigerant in a U-shape, and the lower center portion is recessed upward, and the lower portion is downward. Protruding in an arc shape, grooves and protrusions are formed alternately in parallel in the longitudinal direction, corrugated form, the grooves and protrusions are formed to be inclined downward on both sides about the vertical center line alternately to form a corrugated shape, pleats in the lower part of the entrance network It characterized in that it comprises any one of the baffles selected from the group including the form bent toward, and the form having a plurality of through holes formed in the lower end.

According to the present invention, the refrigerant inlet pipe is formed by expansion pipe connecting portion with the inlet network of the refrigerant inlet pipe having an inner diameter larger than the inner diameter of the refrigerant outlet pipe, and is formed by the shaft pipe around the lower end of the expansion pipe The inlet side insertion hole of the cover which has a shaft pipe part and through which a refrigerant | coolant inlet pipe passes corresponding to the expansion pipe part has a diameter larger than the outlet side insertion hole of the cover which a refrigerant | coolant outlet pipe passes. Then, the upper end of the inlet network is coupled and fixed around the shaft pipe portion of the refrigerant inlet pipe.

In addition, according to the present invention, the lower end portion of the inlet network has a joint portion which is located parallel to the baffle by being inclined to shrink.

According to the oil separator of the present invention configured as described above, when the refrigerant and the oil mixed gas discharged from the compressor reach the expansion portion of the refrigerant inlet pipe, the flow velocity of the mixed gas is reduced because of the large flow cross-sectional area, thereby separating the oil in the oil separator. The effect is greater.

The mixed gas flowing through the refrigerant inlet pipe toward the inlet network collides with the inlet network, and the oil aggregates into large droplets and scatters to the inner wall surface of the oil separation vessel or the inlet network surface of the baffle. The oil scattered as described above flows through the inner wall of the oil separator and flows into the oil storage chamber. In addition, the oil splashed on the surface of the baffle inlet network flows easily into the oil storage chamber according to the characteristic shape of the baffle constituting the oil separator according to the present invention so that the oil does not form well at the bottom of the baffle. Discharge through this refrigerant outlet pipe is prevented.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

As shown in FIG. 1, reference numeral 1 denotes an oil separator, a space 11 is formed therein, an upper end is covered with a cover 12, and an oil outlet 15 is installed at a lower end thereof. The space 11 at the oil outlet 15 of the space 11 is used as an oil storage chamber 16 in which oil is filled and stored. Through-holes 13 and 14 are provided at both sides of the cover 12 around the center of the cover 12, respectively, and the coolant inlet pipe 2 and the coolant are formed through the through-holes 13 and 14, respectively. The outlet pipe 3 is installed through. The refrigerant inlet pipe 2 is connected to the discharge line of the compressor and the refrigerant outlet pipe 3 is connected to the inlet line of the condenser. And, the oil outlet 15 is connected to the inlet line of the compressor through the capillary tube (4). Therefore, the mixed gas in which the high temperature and high pressure refrigerant gas discharged through the outlet of the compressor and the oil in the liquid state is introduced into the oil separation vessel 1 through the refrigerant inlet pipe 2 and the oil separation vessel 1 Since the refrigerant gas and the liquid oil are separated from each other, the refrigerant gas is transferred to the condenser through the outlet end of the oil separation container 1, and the separated oil is once stored in the oil storage chamber 16 of the oil separation container 1. Through the capillary tube 4 is supplied into the compressor along the compressor inlet line, it is possible to prevent the oil from flowing into the heat exchanger in a state in which the oil is mixed with the refrigerant.

The capillary tube 4 connected to the oil outlet 15 of the oil separation container 1 serves to supply the compressor with the amount of oil stored in the oil storage chamber 16 for the lubrication of the compressor. The storage height of the oil stored in the oil storage chamber 16 is increased to prevent the discharge to the heat exchanger. In order to supply the compressor with as much oil as necessary for lubrication of the compressor, the capillary tube 4 needs to have a range of flow coefficients (0.01 to 3.5), which is explained by the inner diameter of the capillary tube 4. When considering the capillary tube of a constant length (1m), the inner diameter is preferably in the range of 0.1 to 2.4mm.

According to the present invention, the refrigerant inlet pipe 2 extends through the cover 12 in order to reduce the flow rate of the refrigerant by adiabatic expansion and to increase the separation performance of the oil contained in the refrigerant. An expansion pipe portion 21 having an inner diameter larger than the inner diameter of () is formed, and the shaft pipe portion 22 is formed by the shaft pipe around the lower end of the expansion pipe portion 21. That is, the shaft pipe part 22 has the ring groove shape.

An inlet network 5 is coupled to and supported by the lower end of the oil separation tube 1 of the refrigerant inlet pipe 2. The inlet net 5 is supported by the upper end coupled around the shaft pipe part 22 of the refrigerant inlet pipe 2. That is, the packing ring (not shown) is coupled around the upper end of the inlet network 5 coupled around the shaft pipe part 22, and the bipartite fastening ring 52 is coupled around the packing ring to divide the bipartite fastening ring ( The inlet network 5 can be supported by the refrigerant inlet pipe 2 by clinching both ends of 52.

Meanwhile, according to the present invention, the baffle 6 is provided downward from the center position between the refrigerant inlet pipe 2 and the refrigerant outlet pipe 3 on the bottom surface of the lid 12. Therefore, the inlet network 5 and the refrigerant outlet pipe 3 are blocked from facing each other, so that the flow path of the refrigerant flowing through the refrigerant inlet pipe 2 is U-shaped, and thus, through the refrigerant inlet pipe 2. It is possible for the baffle 6 to block the oil which is discharged and scattered toward the inlet network 5 directly toward the refrigerant outlet pipe 3 by the flow rate of the refrigerant.

It is preferable that the lower end of the inlet network 5 is inclined to be inclined to be parallel to the surface of the baffle 6 in correspondence with the baffle 6. The bottom junction 51 of the web 5 faces each other side by side with the baffle 6.

The length of the baffle 6 and the length of the inlet net 5 are appropriately set in consideration of the volume ratio of the oil storage chamber 16.

As mentioned above, the volume fraction of the oil storage chamber 16 has a great influence on the oil separation performance. For example, when the internal volume is small, when the flow rate of the refrigerant is large during oil separation, the oil tends to be discharged together in the refrigerant flow. However, if the internal volume is large, the flow rate of the refrigerant in the oil separator is low, so the oil can be easily separated. That is, the volume ratio of the oil storage chamber refers to the maximum oil storage height of the oil storage chamber in which the flow of the refrigerant in the oil separation vessel can be made from the refrigerant inlet pipe to the refrigerant outlet pipe without changing the speed, and the oil storage height is higher than that. The fluctuation of the storage oil occurs due to the flow of the ground coolant, which causes the storage oil to be discharged through the refrigerant outlet pipe.

Therefore, if the compressor has a large amount of oil in the system operation, the volume of the oil reservoir 16 is not a problem even if it is set small, but if the oil is temporarily discharged from the compressor to the heat exchanger side when the oil reservoir 16 is full As the oil is coated on the surface of the heat exchanger, the heat exchange efficiency becomes worse. Even if oil flows temporarily to the heat exchanger side, it takes a long time for the coated oil to be returned to the compressor. Thus, there is a need for an oil reservoir 16 of adequate capacity capable of responding to the operating state of the system.

In the present invention, the compaction of the oil separator can be achieved by selectively employing the baffles 6 having a special structure so as to consider the volume fraction of the oil separator as described above and increase the oil separation performance and the cooling performance together. have.

Next, preferred embodiments of the baffle 6 constituting the oil separator according to the present invention will be described.

<Example 1>

The first embodiment of the baffle constituting the oil separator of the present invention will be described with reference to FIGS. 1 to 3.

The baffle 6 according to the first embodiment has a shape in which the lower center part is recessed upward, as shown in FIGS. 2 and 3. Preferably, the recess 61 of the baffle 6 according to the first embodiment is recessed in an arc or an ellipse.

When the baffle 6 is formed as described above, when oil flowing from the inlet network 5 to the inlet network 5 side surface of the baffle 6 flows on the inlet network 5 side surface of the baffle 6. As shown in FIG. 2, the refrigerant flows easily into the oil storage chamber 16 through both the inlet portions 61 of the baffle 6, and the refrigerant easily flows into the refrigerant outlet pipe 3 through the inlet portion 61. The flow rate of oil prevents the oil flowing down the surface of the inlet network 5 of the baffle 6 from flowing along with the refrigerant toward the refrigerant outlet pipe 3.

In addition, the distance between the top end of the center of the concave portion 61 and the surface of the oil stored in the oil storage chamber 16 is increased by the concave portion, so that the flow cross-sectional area of the refrigerant penetrating the center of the oil separation vessel 1 is widened. Particles of oil existing on the surface of the oil stored in the oil storage chamber 16 are prevented from being shaken by the flow rate of the refrigerant and flowing together with the refrigerant toward the refrigerant outlet pipe 3 together with the refrigerant, thus effectively discharging oil. By reducing the supply of the oil for the compressor lubrication is smooth, it is possible to store a sufficient amount of oil to some extent in the oil storage chamber (16). In other words, it is possible to increase the volume ratio of the oil storage chamber 16 and to compact the size of the oil separation container 1.

<Example 2>

A second embodiment of the baffle constituting the oil separator of the present invention will be described with reference to FIG. 4.

The baffle 6 according to the second embodiment has a shape in which the lower center portion protrudes downward. The protrusion 62 of the baffle 6 according to the second embodiment is preferably formed to protrude in an arc or ellipse.

As described above, when the baffle 6 is formed, when the coolant flows from the inlet network 5 to the coolant outlet pipe 3 through the lower bottom of the baffle 6, the travel distance of the coolant becomes long, so that the oil and the coolant It is prevented from flowing out and flowing toward the outlet pipe 3.

<Example 3>

A third embodiment of the baffle constituting the oil separator of the present invention will be described with reference to FIG. 5.

The baffle 6 according to the third embodiment has a corrugated shape by the grooves 63 and the projections 64 alternately formed side by side in the longitudinal direction.

As described above, when the baffle 6 is formed, oil splashed from the inlet network 5 to the inlet network 5 side of the baffle 6 rides on the inlet network 5 side surface of the baffle 6 to the oil reservoir. As the oil flows into the groove 63 on the inlet network 5 side of the baffle 6 when it flows down to (16), the oil is guided to flow down, so the refrigerant flows through the bottom lower portion of the baffle 6 to the refrigerant outlet pipe. When flowing to (3), oil is prevented from flowing with the refrigerant toward the refrigerant outlet pipe (3).

<Example 4>

A fourth embodiment of the baffle constituting the oil separator of the present invention will be described with reference to FIG. 6.

In the baffle 6 according to the fourth embodiment, the grooves 65 and the protrusions 66 are alternately formed to be inclined downward on both sides of the vertical center line, thereby forming a corrugated pattern.

As described above, when the baffle 6 is formed, oil splashed from the inlet network 5 to the inlet network 5 side of the baffle 6 rides on the inlet network 5 side surface of the baffle 6 to the oil reservoir. When flowing down to (16), oil is introduced into the groove (65) side of the baffle (6) inlet groove (5) to guide the oil to flow down, as well as the groove (65) below both ends of the baffle (6). Because of the inclination of the oil, it is effectively prevented that the oil flows with the refrigerant toward the refrigerant outlet pipe 3 when the refrigerant flows through the lower end of the baffle 6 to the refrigerant outlet pipe 3.

<Example 5>

A fifth embodiment of the baffle constituting the oil separator of the present invention will be described with reference to FIG. 7.

In the baffle 6 according to the fifth embodiment, a plurality of through holes 67 are formed at a lower end thereof.

As described above, when the baffle 6 is formed, a part of the refrigerant flowing out of the inlet network 5 passes through the through holes 67 of the baffle 6, and a part of the refrigerant is lower than the bottom of the baffle 6. Since the air flows toward the refrigerant outlet pipe 3 through the oil, the distance between the surface of the oil stored in the oil storage chamber 16 and the flow path of the refrigerant is relatively long, and thus the oil existing on the surface of the oil stored in the oil storage chamber 16. The fluctuation of the particles is relatively small so that these surface oil particles are prevented from flowing out of the refrigerant outlet pipe 3 together with the refrigerant by the flow velocity of the refrigerant.

<Example 6>

An example 6 of a baffle constituting the oil separator of the present invention will be described with reference to FIG. 8.

The baffle 6 according to the sixth embodiment is formed by bending the lower end toward the entrance net 5.

As such, when the lower end of the baffle 6 is bent toward the inlet net 5, the length of the baffle 6 is shortened by the bent part 68, so that the flow cross sectional area of the refrigerant is increased and the inlet net 5 of the baffle 6 is increased. The oil scattered on the surface of the baffle 6 and flows down the surface of the entrance net 5 of the baffle 6 flows into the bent portion 68 and flows into the oil storage chamber 16 through both sides of the bent portion. Therefore, when the coolant flows through the bottom of the baffle 6 toward the coolant outlet pipe 3 and is discharged, not only oil is prevented from flowing out and flowed toward the coolant outlet pipe 3 together with the coolant by the flow rate of the coolant. To some extent, the height of the oil stored in the oil storage chamber 16 may be increased, thereby increasing the volume ratio of the oil storage chamber 16.

As described above, in the compressor discharge line oil separator according to the present invention, only the inlet network 5 connected to the refrigerant inlet pipe 2 is installed inside the oil separator oil separator 1 and the flow path of the refrigerant is U. The baffle 6 which guides in the shape is formed in a characteristic structure, so that oil is guided to the refrigerant by the flow rate of the refrigerant in the process of discharging the refrigerant introduced into the oil separation container 1 through the refrigerant outlet pipe 3. As a result, the oil separation performance is improved and the emission of oil is significantly reduced. Therefore, the oil supply to the compressor is smoothly performed and the supply of oil to the heat exchanger is prevented, thereby improving the heat exchangeability of the heat exchanger, thereby improving cooling performance. Is improved.

In addition, by installing the expansion part 21 at the end connected to the inlet network 5 of the refrigerant inlet pipe 2, the flow velocity of the mixed gas decreases because the flow cross-sectional area of the mixed gas of the refrigerant and oil is large, so that the oil in the oil separator is reduced. Separation effect is further improved.

In addition, since the storage height of the oil stored in the oil storage chamber 16 can be effectively increased by the characteristic structure of the baffle 6, the size of the oil separator is compact compared with the conventional oil separator having the same oil storage chamber 16 volume ratio. Can be reduced.

In addition, since the exit network employed in the prior art can be excluded, not only the structure is simple but also the manufacturing cost can be reduced.

In addition, since the diameters of the inlet and outlet insertion holes formed in the cover 12 are different from each other, there is no fear of misassembly when assembling the refrigerant refrigerant inlet pipe 2 and the refrigerant outlet pipe 3, thereby improving the assemblability of the oil separator. do.

In addition, noise and vibration are not generated when the oil is discharged together through the refrigerant outlet pipe 3 by the flow of the refrigerant in the process of oil being hit by the outlet network and thus scattered by the conventionally adopted outlet network. Can be reduced.

Claims (3)

An oil separation passage formed at an inner side of the lower end with an oil storage chamber 16 and having an oil discharge port connected to a capillary tube at a lower center thereof, and having a refrigerant inlet pipe and a refrigerant outlet pipe connected to both sides of the upper cover; An inlet network having an upper end coupled to a lower end of a refrigerant inlet pipe in the oil separation vessel; It extends downward from the cover by a predetermined length so as to cut off between the inlet network and the lower extension portion of the refrigerant outlet pipe to guide the flow of the refrigerant in a U-shape, and the lower center portion is recessed upward, and the lower portion is downward. Protruding in an arc shape, grooves and protrusions are formed alternately in parallel in the longitudinal direction, corrugated form, the grooves and protrusions are formed to be inclined downward on both sides about the vertical center line alternately to form a corrugated shape, pleats in the lower part of the entrance network Oil baffle comprising any one of the baffles selected from the group including the form of the curved side, and the form of a plurality of through holes formed in the lower end. According to claim 1, wherein the refrigerant inlet pipe is connected to the inlet network of the refrigerant inlet pipe is formed by expansion pipe expansion tube having an inner diameter larger than the inner diameter of the refrigerant outlet pipe, and by the shaft pipe around the lower end of the expansion pipe portion Has a shaft portion formed, The inlet insertion hole of the cover through which the refrigerant inlet pipe passes corresponding to the expansion pipe has a larger diameter than the outlet insertion hole of the cover through which the refrigerant outlet pipe passes. Oil separator, characterized in that the upper end of the inlet network is coupled and fixed around the shaft pipe portion of the refrigerant inlet pipe. 3. The oil separator of claim 2, wherein the lower end of the inlet network has a joint parallel to the baffle by being obliquely reduced.