KR100498638B1 - Oil-separator of cooling unit - Google Patents

Abstract

The present invention relates to an oil separator of a cooling device, and an object of the present invention is to efficiently filter oil and foreign substances contained in a refrigerant discharged from a compressor and to facilitate maintenance.

The oil separator of the cooling apparatus according to the present invention has a case 10 having a space therein, one end of which is communicated with the inside of the case and the other end is connected to the condenser side pipe and the compressor side pipe, respectively. A condenser connector 20 and a compressor connector 30; A capillary tube 40, one end of which is in contact with the bottom of the case and the other end of which is connected to the compressor suction side to guide oil back to the compressor side; A first oil filtration network 50 installed at an inner end of the compressor connecting pipe; A second oil filtration network (60) in the form of a scrubber interposed between the first oil filtration network and a condenser connecting pipe at an upper side thereof; And a third oil filtration plate 70 disposed above the second oil filtration network, wherein the compressor connecting pipe may be screwed to be detachable from the case. As a result, the oil pressurized by the compressor passes through the oil filtration members to separate the oil in multiple stages, and the compressor connection pipe may be filtered to clean the oil separator.

Description

Oil Separator in Cooling Unit {OIL-SEPARATOR OF COOLING UNIT}

The present invention relates to an oil separator of a cooling device, and more particularly, to an oil separator of a cooling device, which effectively separates oil and foreign matter contained in a gaseous refrigerant being fed from a compressor from a refrigerant and makes maintenance easy. It is about.

The refrigeration tower vehicle refers to a vehicle provided with a refrigeration tower (container) having an insulating structure on the top of the deck, and refrigerated or frozen by the freezer the goods stored in the inside of the refrigeration tower.

The refrigeration tower cooling apparatus includes an evaporator for lowering the temperature of the blower air by heat-exchanging the blower air blown to the outside and the refrigerant flowing therein, a compressor for compressing and discharging the refrigerant supplied from the evaporator, and the discharged from the compressor. And a condenser for dissipating the refrigerant to condense it into the liquid phase, and an expansion valve for expanding and supplying the refrigerant discharged from the condenser. In addition, a blower is installed to blow air toward the evaporator, and a controller for electrically connecting a temperature setting unit for setting a cooling temperature to a desired temperature and a temperature sensing unit sensing an internal temperature of the freezing tower is generally installed. .

The air deprived of heat by evaporation of the refrigerant in the evaporator is changed to a low temperature and low humidity state and is blown into the freezing tower to cool the inside of the freezing tower. In this process, the refrigerant changed into gas in the superheated steam is sent to the compressor to compress, Circulated.

The compressor discharges the refrigerant gas discharged after the evaporation is completed and discharged to the condenser, which is easy to be liquefied, and is discharged to the condenser, thereby allowing the refrigerant to circulate the refrigeration cycle.

On the other hand, oil is supplied to the compressor for the purpose of lubrication for smooth operation of the compressor. The oil performs lubrication of the mechanical friction surfaces of the compressor drive part. At this time, when the lubricating oil contained in the refrigerant flows into the condenser and / or the evaporator or the expansion device, the fluidity of the refrigerant decreases because the lubricating oil is coated on the inner wall of the heat exchanger or occupies the space of the refrigerant flow path of the heat exchanger. Heat exchange efficiency of heat exchanger is inferior. In addition, when the lubricating oil circulates through the entire cooling system, a great fluctuation occurs 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 stable and smooth. Therefore, an oil separator is employed to prevent lubrication oil from being supplied to other components except the compressor.

The oil separator separates the oil contained in the gas refrigerant discharged from the compressor and returns to the suction side of the compressor, thereby preventing the efficiency of the heat exchanger generated when the oil flows out to the heat exchanger side and lubricating the compressor stably. To lose.

As an example of such an oil separator, for example, a domestic cooler device has been proposed as Korean Utility Model No. 164344.

As shown in FIG. 1, a filtration device applied to a cooler device of a conventional vehicle includes a case 1 and a condenser connection part 2 installed in an upper direction of the case 1 and connected to a condenser (not shown). And a first compressor connecting portion 3 installed laterally at the side of the case 1 and connected to the discharge side of the compressor (not shown), and installed at the bottom of the case 1 in the longitudinal direction and at the suction side of the compressor. And a second compressor connecting portion 4 connected to the oil guide to guide oil return, a cylindrical wire mesh 5 installed at the bottom of the upper case of the case 1, and a pressure reducing portion 6 formed at the bottom of the case 1. A capillary tube (1) which is wound around the bottom of the case (1) and the other end is connected to the suction side of the compressor through the second compressor connection part (4) to return oil collected at the bottom of the case (1) to the compressor ( 7) consists of.

Although not shown in the drawings, a fixing bracket is integrally formed in the filter case 1 so that the filter tube is fixed to the vehicle body with bolts or the like.

According to the prior art, the high pressure gas refrigerant discharged from the compressor is supplied to the condenser through the first filter connecting pipe (3) to the condenser, the gas refrigerant is a cylindrical wire mesh in the process of passing the refrigerant through the cylindrical wire mesh (5) After passing through (5), the liquid oil, foreign matter remains in the cylindrical wire mesh (5) falls on the bottom, the oil collected in the bottom of the case (1) is returned to the compressor suction side to the capillary (7).

However, according to the oil separator applied to the vehicle cooler device according to the prior art, there are the following problems.

When the gaseous refrigerant passes through the cylindrical wire mesh 5, the oil contained in the gaseous refrigerant and foreign matter are buried in the wire mesh 5 and filtered out of the gaseous refrigerant. However, since the refrigerant cannot filter all the oil contained in the refrigerant, The cooling cycle is circulated with oil. Therefore, the oil circulates through the cooling cycle, thereby lowering the fluidity of the refrigerant, thereby lowering the heat exchange efficiency of the heat exchanger. And the durability of the compressor is lowered because the compressor is not lubricated stably and smoothly.

And since the condenser connection part 2, the compressor connection part 3, 4, etc. are permanently fixed to the case 1, when the connection part 2, 3, 4 cracks generate | occur | produce, or is blocked, the case 1 whole There is a disadvantage in that the replacement, and the case (1) when cleaning the inside of the case (1) must be separated.

In addition, the arrangement of the condenser and the compressor constituting the cooling system may vary depending on the vehicle type, but since the connecting parts 2 and 3 are permanently fixed to the case 1 and cannot be changed in direction, the oil separator, the condenser and the compressor are connected. There is also a disadvantage that the length of the pipe to be changed.

In addition, the oil separated from the gaseous refrigerant by the cylindrical wire mesh 5 and accumulated on the bottom of the case 1 may include foreign matter, and the foreign matter may be returned to the compressor together with the oil, thereby degrading the performance of the compressor due to impurities.

The present invention is to solve the above problems, it is an object of the present invention to provide an oil separator of the cooling device that can effectively filter oil and foreign matter contained in the gas refrigerant discharged from the compressor from the gas refrigerant.

In addition, another object of the present invention is to facilitate the cleaning, maintenance work.

Still another object of the present invention is to make it possible to connect the oil separator and the condenser / compressor in the shortest distance regardless of the arrangement of the condenser and the compressor.

Another object of the present invention is to be able to supply the optimum oil to the compressor.

Oil separator of the cooling apparatus according to the present invention for achieving the above object, and a case having a space therein; A condenser connecting pipe / compressor connecting pipe installed in the casing from the upper side to the lower side and connected to the condenser side pipe and the compressor side pipe, respectively; A capillary tube having one end contacting the bottom of the case and the other end connected to the suction side of the compressor to guide oil back to the compressor side; A first oil filtration network having a mesh structure installed at an inner end of the compressor connecting pipe; A second oil filtration network having a scrubber type installed between the compressor connecting pipe and the condenser connecting pipe; And a third oil filtration plate installed horizontally on an upper portion of the second oil filtration network.

The first oil filtration network may be detachably assembled to the compressor connecting pipe.

The third oil filtration plate may include a filter plate having a plurality of holes perforated and a mesh network having a mesh structure attached to the filter plate.

According to the oil separator of the cooling apparatus according to the present invention, a nut is fixed to the case, and a screw thread is formed on the outer peripheral surface of the end of the compressor connecting pipe to be screwed to the nut, so that the compressor connecting pipe is detachably installed in the case. Can be.

The case may be rotatably installed in a fixing bracket fixed to the vehicle body so as to change the direction of the condenser connecting tube / compressor connecting tube.

The oil separator of the cooling apparatus according to the present invention may be further provided with a filter net, a filter plate for filtering foreign substances from the oil filtered through the oil filter net, an oil filter plate.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

3 and 4, the oil separator 100 for a cooling device according to the present invention is installed between a compressor and a condenser, not shown, to filter the oil contained in the gas refrigerant discharged and compressed by the compressor. The case 10 having a space formed therein (shown in FIGS. 2 and 4), and the refrigerant circulated from the compressor / condenser side not shown in the case 10 and installed in the case 10 and the inner space of the case 10. A condenser connecting pipe 20 and a compressor connecting pipe 30 respectively connecting the pipes, oil filtration means for separating oil contained in the gas refrigerant delivered from the compressor and supplying only the gas refrigerant to the condenser side, and the oil filtration It may comprise a capillary tube 40 for returning the oil separated from the refrigerant by the means to the suction side of the compressor.

As shown in FIG. 2 and FIG. 4, the case 10 may be formed of upper / lower case members 11 and 12 that form spaces therein by opening the surfaces facing each other and being coupled to each other. As shown in FIG. 4, the oil collection part 12a may be concave at the bottom of the lower case member 12 so that oil may collect.

As shown in FIG. 4, the condenser connecting pipe 20 may be installed in the upper case member 11 in the lateral direction, the coolant inlet 21 may be opened downward, and the coolant outlet 22 is the upper portion. Can be bent upwards to face.

As shown in FIG. 3, the compressor connecting pipe 30 may be installed in the lower case member 12 in a transverse direction so as to be able to be filtered. As an example of the installation structure, for example, the nut 13 is fixed to the lower case member 12 by welding or the like, and a screw portion 31 fastened to the nut 13 is formed on the outer circumferential surface of the front end portion of the compressor connecting pipe 30. The compressor connector 30 is screwed to the nut 13, so that the compressor connector 30 is detachably assembled to the lower case member 12.

Although not shown in the drawings, the condenser connector 20 may also be detachably assembled in the same structure as the compressor connector 30.

As shown in FIG. 4, the capillary tube 40 is wound around the outer circumferential surface of the annular fixing frame 41 inserted into the lower case member 12 while one end of the oil collection unit allows oil to be collected into the oil collection unit 12a. It is disposed close to the bottom of the oil portion 12a, and the other end is connected to the compressor suction side. Capillary tube 40 is to return the oil by the pressure difference, the return amount of the oil varies depending on the length, it is wound on the fixing frame 41 by the length that can effectively return the oil. The bottom end of the capillary 40 may be coupled to the mesh 42 of the mesh structure. The lower k member 12 may be provided with a connecting tube 43 for connecting the compressor side end of the capillary tube (40).

Fixing frame 41 is formed symmetrically up / down, the outer peripheral surface is provided with a capillary wound, the filter plate 44 for removing foreign matter contained in the oil may be mounted horizontally. Filter plate 44 may be in the form of a mesh.

As shown in FIGS. 3 and 4, the oil filtration means includes a first oil filtration net 50 and a first oil inside the upper case member 11, which are installed in a net shape at the inner end of the compressor connecting pipe 30. A scrubber-type second oil filtration network 60 disposed above the filtering network 50, and a third oil filtration plate 70 horizontally installed between the second oil filtration network 60 and the condenser connecting pipe 20. It can be done by.

As shown in FIG. 3, the first oil filtration network 50 is coupled to be easily detached from the compressor connector 30 when necessary, and may be screwed to, for example, an end of the compressor connector 30.

The third oil filtration plate 70 may be formed of a filter plate 71 in which a plurality of holes 71a having a diameter of about 5 mm are perforated, and a mesh network 72 attached to the filter plate 71.

The oil separator according to the present invention is installed in the vehicle body together with a condenser, a compressor, etc., and the positions of the condenser and the compressor may vary according to the vehicle type. When the positions of the condenser and the compressor are changed, the condenser of the oil separator may vary depending on the direction of the condenser The connector 20, the compressor connector 30 is installed so as to change the direction. For example, as shown in FIG. 5, the oil separator 100 may be rotatably installed on the fixing bracket 80 fixed to the vehicle body.

The fixing bracket 80 may be bent and formed in a substantially depressed shape so that the long holes 82 may be formed in the upper and lower fixing portions 81, respectively.

The oil separator 100 has bolts 14 installed on the upper and lower surfaces of the upper and lower case members 11 and 12, respectively, and are fastened to the nuts 14 while passing through the long holes 82 of the fixing bracket 80. It is fixed through 15. Since the oil separator 100 may be arbitrarily rotated and moved inside the fixing bracket 80 before the bolt 15 is fastened, the oil separator 100 may be rotated and moved to condenser connecting pipe 20 and the compressor connecting pipe ( By changing the position of 30), the pipe for connection with the condenser can be shortened.

The oil separator of the cooling device configured as described above is as follows.

Referring to the fixing structure of the oil separator according to the present invention, the fixing bracket 80 is fixed to the vehicle body with bolts 83, and the oil separator 100 is disposed between the upper and lower fixing portions 81 in the condenser. To set the position while rotating and moving the oil separator 100 so that the compressor and the respective connecting pipes 20 and 30 can be connected at the shortest distance, and the position is set, the oil separator 100 is connected through the bolts 15, respectively. Fix to the fixing bracket (80).

Hereinafter, an oil separation process by an oil separator according to the present invention will be described.

The gas refrigerant compressed by the high pressure and high pressure in the compressor is introduced into the compressor connecting pipe 30 of the oil filter through the refrigerant circulation pipe.

The refrigerant introduced into the compressor connecting pipe 30 is introduced into the case 10 through the first oil filtration network 50, and in this process, the gas refrigerant passes through the first oil filtration network 50 and the liquid oil. Since the foreign materials and each have a viscosity and a volume, they do not pass through the first oil filtration network 50 and are buried in the first oil filtration network 50 and fall to the bottom side of the case 10 by gravity.

The gas refrigerant passing through the first oil filtration network 50 passes through the second oil filtration network 60 and the third oil filtration plate 70 on the upper side, and then flows through the refrigerant inlet 21 of the condenser connecting pipe 20. It is supplied to the condenser side. While the gas refrigerant passes through the second oil filtration network 60 and the third oil filtration plate 70, the oil contained in the refrigerant is also buried in the second oil filtration network 60 and the third oil filtration plate 70. Will fall to the bottom. In the process of passing the gas refrigerant through the second oil filtration network 60, since the second oil filtration network 60 is irregularly entangled in the form of a scrubber, the gas refrigerant passes through the second oil filtration network 60 without any directivity. The filtration effect of the oil is greater than when passing through the hole consisting of. In addition, the gas refrigerant passing through the second oil filtration network 60 passes through the filter plate 71 and the filter network 72 of the third oil filtration plate 70 in order to filter most of the oil and foreign matter included in the gas refrigerant. Can be.

The liquid oil which is filtered down from the gaseous refrigerant by the first and second oil filtration networks 50 and 60 and the third oil filtration plate 70 and falls to the bottom passes through the filter plate 44, and the foreign matter contained in the oil is filtered. The oil remains in the 44 and only oil is collected in the oil collecting part 12a of the lower case member 12.

The oil collected in the oil collecting part 12a is returned to the suction side of the compressor through the capillary tube 40 to lubricate the compressor. The oil is returned to the state in which foreign matter is removed by the filtration member 42 at the end of the capillary tube 40.

Meanwhile, when cleaning the inside of the oil filter unit, the compressor connecting pipe 30 is rotated without being separated from the case 10 and separated from the lower case member 12 to open the case 10. The inside of the case 10 can be cleaned through the hole provided.

In addition, the first oil filtration network 50 takes the most foreign matter in its position and should be cleaned and replaced from time to time. In this case, the screw connection of the first oil filtration network 50 is released and separated from the compressor connecting pipe 30. After that, the first oil filtration network 50 can be cleaned and replaced.

Therefore, the oil contained in the gaseous refrigerant pressurized by the compressor is filtered in multiple stages through the first and second oil filtration networks 50 and 60 and the third oil filtration plate 70, and each oil filtration member 50, 60 and 70. Since each structure has a characteristic of), most oils and foreign substances included in the gas refrigerant are filtered to supply only the gas refrigerant to the condenser.

In addition, the compressor connector 30 may be detachable from the case 10 to clean the inside of the case 10 in a state in which the compressor connector 30 or the condensate connector 20 is separated.

In addition, by rotating the oil separator 100 in the fixing bracket 80, it is possible to shorten the pipe length for the connection of the oil separator 100, the condenser, the compressor.

In addition, the oil from which foreign matters are removed may be supplied to the compressor through the filter plate 44 and the filter network 42.

As described above, according to the oil separator of the cooling apparatus according to the present invention, since the gas refrigerant fed from the compressor passes through a multi-stage oil filtration step, most oil and foreign substances can be filtered from the refrigerant, so that the oil is condensed. It is possible to prevent a decrease in heat exchange efficiency, shortening of compressor life, and the like, generated by entering the cooling device.

In addition, since the compressor connection pipe can be removed to clean the inside of the oil separator, the inconvenience of separating and combining the case is eliminated.

In addition, the piping distance of the condenser condenser, compressor connector and condenser, compressor of the oil separator can reduce the cost.

In addition, by returning the oil from which the foreign substances have been removed to the compressor, the performance of the compressor can be improved, and failures can be prevented.

While the invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

1 is a longitudinal sectional view of an oil separator applied to a cooler device of a vehicle according to the prior art;

Figure 2 is a perspective view of the oil separator of the cooling apparatus according to the present invention.

Figure 3 is an exploded perspective view showing an oil separator of the cooling device according to the present invention.

Figure 4 is a longitudinal sectional view showing the oil separator of the cooling device according to the present invention.

Figure 5 is an exploded perspective view showing the installation structure of the oil separator of the cooling apparatus according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: case, 11: upper case member

12: lower case member, 12a: oil collection part

20: condenser connector, 30: compressor connector

31: thread portion, 40: capillary tube

41: fixed frame, 42: filter network

50: 1st oil filtration network, 60: 2nd filtration network

70: third filter plate, 80: fixing bracket

Claims (6)

delete A case 10 forming a sealed space; A condenser connecting pipe 20 and a compressor connecting pipe 30 respectively installed at one side and the ceiling of the case and connected to a condenser side pipe and a compressor side pipe at each end thereof; A capillary tube 40 having a front end disposed at the bottom of the case and having an end connected to the suction side of the compressor to guide oil collected at the bottom of the case 10 to the suction side of the compressor; A first oil filtration network 50 detachably coupled to an inner end of the compressor connecting pipe 30; A second oil filtration network (60) installed between the compressor connecting pipe (30) and the condenser connecting pipe (20) to filter foreign matter from the refrigerant flowing from the compressor connecting pipe to the condenser connecting pipe (60); And, And a third oil filtration plate (70) installed horizontally above the second oil filtration network to filter foreign matter from the refrigerant flowing toward the condenser connection pipe. delete The method of claim 2, The compressor connecting pipe 30 has a screw portion formed at an inner end thereof and is fastened in a screw fastening manner to a nut 13 fixed to the case, so that the oil separator of the cooling apparatus is configured to be detachably coupled to the case. . The method according to claim 2 or 4, The case 10 is an oil separator of the cooling device, characterized in that it is configured to be rotatably fixed to the fixing bracket (80) of the vehicle body to change the direction of the condenser connecting pipe (20) and the compressor connecting pipe (30). The method of claim 2, A filter plate 44 disposed between the first oil filtration network and the bottom of the case to filter foreign matter from the oil falling to the bottom of the case; An oil separator of the cooling device, further comprising: a filtering net (42) installed at the end of the capillary to filter foreign matter from the oil flowing into the capillary.