KR200303998Y1 - Oil-separator of cooling unit - Google Patents

Abstract

The present invention relates to an oil separator of a cooling apparatus, and aims to effectively filter oil by maximizing an oil filtration area capable of filtering oil from a refrigerant.

The oil separator of the cooling apparatus according to the present invention has a case 10 having a space therein, penetrated through the case, and one end communicates with 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 connected to the compressor connector; A refrigerant guide (80) disposed above the first oil filtration network to guide the refrigerant to flow downward; A third oil filtration plate (70) bent to have a vertical portion (71) and a horizontal portion (72) and disposed close to the condenser connection pipe; It includes a second oil filtration network 60 of a scrubber type filled over the upper and lower sides of the first oil filtration network inside the case. As a result, the coolant is guided by the coolant guide and flows to the bottom side of the case, and then the oil is filtered by the second oil filtration network filled in the case in the process of flowing to the upper condenser connection tube side.

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 filtration zone for filtration of oil from a gas refrigerant fed from a compressor, to maximize the oil filtration area to effectively separate oil and foreign matter from the refrigerant. An oil separator.

A refrigeration tower vehicle refers to a vehicle installed on the deck and configured to refrigerate or freeze an article stored in a refrigeration tower (container) having an insulating structure by a cooling device.

The cooling device for a refrigeration tower 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 a discharge from the compressor. And a condenser for dissipating the refrigerant to condense into a 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 a gas in a superheated steam state is sent to the compressor to compress and circulate. do.

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.

The compressor may be any compressor, such as rotary vane type, swash plate type.

Meanwhile, oil is supplied to the compressor for lubrication of the mechanical friction surfaces of the compressor driving part.

Meanwhile, when the compressor is driven, the oil may flow into the condenser and / or the evaporator or the expansion device together with the refrigerant. In this case, since the oil is coated on the inner wall of the heat exchanger or the like and occupies a space of the refrigerant flow path of the heat exchanger, the refrigerant The fluidity of the is lowered, thereby lowering the heat exchange efficiency of the heat exchanger. In addition, when the oil circulates through the entire cooling system, a significant fluctuation occurs in the amount of oil supplied to the compressor, and thus the durability of the compressor is lowered because lubrication of the compressor is not made stably and smoothly. Therefore, an oil separator is employed to prevent 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, the applicant has filed an oil separator of a cooling device in Patent Application No. 2002-66517.

As shown in FIG. 1, the oil separator 1 of the pre- filed cooling apparatus includes a case 2 having a space therein and a case 2 installed in the case 2 and not shown in the case 2. Separating the condenser connecting pipe (3) and the compressor connecting pipe (4) and the oil contained in the gas refrigerant delivered from the compressor to the condenser side, respectively, connecting the refrigerant circulation pipe from the compressor / condenser side And oil capillary 5 for returning oil separated from the refrigerant by the oil filtration means to the suction side of the compressor.

The capillary tube 5 is wound around the outer circumferential surface of the annular fixing frame 6 inserted into the case 2, and one end thereof is disposed near the bottom of the case 2, and the other end thereof may be connected to the compressor suction side.

The fixing frame 6 may be horizontally mounted with a filter plate 6a for removing foreign substances contained in oil.

The oil filtration means, the first oil filtration net 7 installed in the form of a net at the inner end of the compressor connecting pipe (4), the scrubber-type agent disposed above the first oil filtration net (7) inside the case (2) It may comprise a second oil filtration network (8), a third oil filtration plate (9) installed horizontally between the second oil filtration network (8) and the condenser connecting pipe (3).

According to the oil separator of the cooling apparatus of the prior-source configuration configured as described above, the refrigerant discharged from the compressor through the compressor connecting pipe (4) is filtered through the first oil filtration network (7), the oil and foreign substances are filtered, wherein the refrigerant is the pressure difference By passing through the upper portion of the cylindrical first oil filtration (7) is to flow toward the condenser connecting pipe (3).

Subsequently, the refrigerant is passed through the second oil filtration network 8 and the third oil filtration plate 9 to remove oil and foreign substances in the second and third flows, and then is supplied to the condenser through the condenser connecting pipe 3. On the other hand, the oil separated from the refrigerant is collected at the bottom of the case (2) with foreign matter removed through the filter plate (7) and returned to the suction side of the compressor through the capillary (5).

However, the oil separator of the pre- filed cooling device has the following disadvantages.

The oil is filtered from the refrigerant by friction with the oil filtration members 7, 8, and 9. The greater the area in which the refrigerant and the oil filtration members 7, 8, and 9 friction, the greater the oil separation effect. According to the prior application, the oil filtering section is only between the first oil filtration network 7 and the third oil filtration plate 9 on the upper side, and such oil filtration area is used for the majority of the oil contained in the refrigerant. There is a disadvantage in that the oil separation effect is reduced because it is insufficient to filter. In order to solve this drawback, the size of the case 2 may be increased to increase the oil filtration area, but this may cause a disadvantage of the enlargement of the case 2, and thus is practically ineffective.

And, as described above, the more the contact between the refrigerant and the oil filtration member (7, 8, 9) can be separated more oil contained in the refrigerant, the inside of the case 2, the third oil filter plate (9) Because of the large dead space (for example, the upper side of the third oil filtration plate 9) irrelevant to the oil filtration depending on the installation position, etc., the oil is restricted from the installation of the scrubber type second oil filtration network (8). Another disadvantage is that the separator is less efficient.

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 to maximize the oil separation effect by lengthening the flow path of the gas refrigerant discharged from the compressor.

In addition, another object of the present invention is to make it possible to effectively filter oil by increasing the friction between the refrigerant and the oil filtration member by utilizing the limited space of the oil separator case.

1 is a longitudinal sectional view showing an oil separator of a cooling device according to Patent Application No. 2002-66517.

Figure 2 is a longitudinal sectional view of the oil separator of the cooling device according to the present invention.

Figure 3 is a perspective view of a third oil filter plate applied to the oil separator of the cooling apparatus according to the present invention.

Figure 4 is a perspective view of a refrigerant guide applied to the oil separator of the cooling apparatus according to the present invention.

Figure 5 is a front view showing the installation state of the refrigerant guide applied to 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, 20: condenser connector

30: compressor connector, 40: capillary tube

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

70: 3rd oil filtration plate, 71: vertical part

72: horizontal portion, 80: refrigerant guide

The present invention for achieving the object as described above, the case is provided with 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 installed at an inner end of the compressor connecting pipe; In addition, in the oil separator of the cooling device comprising a second oil filtration network of a scrubber type filled in the case,

The second oil filtration network is filled in the lower side of the first oil filtration network, the refrigerant passing through the first oil filtration network in the upper side of the first oil filtration network after passing through the second oil filtration network in the lower side of the upper side Refrigerant guide for guiding to flow to the condenser connecting tube is characterized in that it is further installed.

The side of the condenser connecting tube is disposed in the third oil filtration plate consisting of a vertical portion and a horizontal portion close to the refrigerant inlet of the condenser connecting pipe so that the second oil filtration network from the lower side of the first oil filtration network to the side of the third oil filtration plate. Can be filled vertically.

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, terms or words used in the present specification and claims are defined in the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her own design. It must be interpreted to mean meanings and concepts.

As shown in FIG. 2, the oil separator 100 of the cooling apparatus according to the present invention includes a case 10 having a space formed therein, and a case 10 installed in the case 10 and a compressor not shown in the case 10. To separate the condenser connecting pipe 20 and the compressor connecting pipe 30 respectively connecting the refrigerant circulating pipes from the condenser side, and the oil contained in the gas refrigerant fed from the compressor to supply only the gas refrigerant to the condenser side. It may comprise an oil filtration means, and a capillary tube 40 for returning the oil separated from the refrigerant by the oil filtration means to the suction side of the compressor.

The capillary tube 40 is wound around the outer circumferential surface of the annular fixing frame 41 inserted into the case 10, and one end thereof is disposed close to the bottom of the case 10, and the other end thereof may be connected to the compressor suction side.

Fixing frame 41 is formed symmetrically up / down, the filter plate 42 for removing the foreign matter contained in the oil may be mounted horizontally. The filter plate 42 may be composed of a filter plate 42A having a plurality of holes perforated and a mesh network 42B attached to an upper surface of the filter plate 42A.

The oil filtration means, the first oil filtration network 50 is installed in the inner end of the compressor connecting pipe 30, the second oil filtration network 60 of the scrubber type filled in the case 10 and the condenser connection It may comprise a third oil filtration plate 70 is installed on the inlet side of the tube (20).

The first oil filtration network 50 may be screwed so as to be easily separated from the compressor connecting pipe 30 when necessary.

The second oil filtration network 60 may have a structure in which wires, synthetic resins, and the like are irregularly entangled.

In the present invention, it is possible to maximize the oil filtration effect by maximizing the oil filtration area by lengthening the flow distance of the refrigerant introduced into the oil separator 100 and increasing the filling amount of the second oil filtration network 60.

For example, as shown in FIG. 2, the refrigerant passing through the first oil filtration network 50 is far from the condenser connecting pipe 20 at the outlet side in order to maximize the oil flow distance within the limited space of the case 10. That is, the coolant guide 80 may be formed to flow to the bottom side of the case 10 and then to flow to the condenser connecting pipe 2 side. The first oil filtration network 50 has a cylindrical shape and allows the refrigerant to pass through the circumference thereof, and may have a closed structure to prevent the refrigerant from passing through.

As shown in FIGS. 2, 4, and 5, the refrigerant guide 80 includes a refrigerant flowing upward through the first oil filtration network 50 (shown in FIGS. 2 and 5). It can be installed to surround the upper and left and right circumference of the first oil filtration network 50 on the upper side of the first oil filtration network 50 made of a curved shape, the end of the inner wall of the case 10 (see Fig. 2) It can be fixed to. Preferably, the refrigerant guide 80 may be made of a semi-circular cross section.

Alternatively, the upper portion of the first oil filtration network 50 may be closed without using a separate refrigerant guide 80 to allow the refrigerant to escape through the lower side of the first oil filtration network 50.

Meanwhile, as shown in FIGS. 2 and 3, the third oil filtration plate 70 is bent to have a vertical portion 71 and a horizontal portion 72 so as to be connected to the condenser connecting pipe 20 (shown in FIG. 2). By being disposed in close proximity to the case 10 (shown in Figure 2) it is possible to ensure the maximum space for filling the second oil filtration network 60. Refrigerant inlets 21 and 22 facing the horizontal and vertical may be formed at the inner end of the condenser connecting pipe 20, respectively.

As shown in FIG. 2, a mesh screen filtration net 73 may be further attached to a surface of the third oil filtration plate 70 facing the condenser connecting pipe 30.

The action of the oil separator of the cooling apparatus according to the present invention configured as described above is as follows.

The refrigerant discharged from the compressor and introduced into the oil separator 100 through the compressor connecting pipe 30 passes through the upper, lower, left, and right circumferences of the first oil filtration network 50, as shown in FIG. The refrigerant passing through the lower portion of the oil filtration network 50 flows to the bottom side of the case 2 (see FIG. 2) while maintaining the traveling direction, and passes through the upper and left / right sides of the first oil filtration network 50. One refrigerant is not guided by the refrigerant guide 80 on the upper side of the first oil filtration network 50 and flows upwardly instead of flowing to the bottom side of the case 10. In the process of passing the refrigerant through the first oil filtration network 50, the oil included in the refrigerant is filtered by the first oil filtration network 50.

As shown in FIG. 2, the refrigerant passing through the first oil filtration network 50 passes downward while passing through the second oil filtration network 60 in the form of a scrubber, and in the process, the first oil filtration network 50 is observed. Unfiltered oil, foreign matter is filtered out.

The refrigerant flowing downward toward the bottom of the case 2 is turned upward to pass through the second oil filtration network 60 filled in the lower side of the first oil filtration network 50 to the second oil filtration network 60. The oil is filtered, and then the oil is filtered through the second oil filtration network 60 disposed on the side of the first oil filtration network 50 and the third oil filtration plate 70.

The refrigerant passing through the second oil filtration network 60 passes through the third oil filtration plate 70, and after the oil is filtered, passes through the refrigerant inlets 21 and 22 of the condenser connection pipe 20 to the condenser connection pipe 20. It is introduced and exited from the oil separator 100 along the condenser connecting pipe 20.

On the other hand, the oil filtered in the refrigerant is returned to the suction side of the compressor through the capillary tube 40, the specific action is the same as the prior application, it will be omitted.

Therefore, since the refrigerant is guided by the refrigerant guide 80, the refrigerant passes through the scrubber-type second oil filtration network 60 a plurality of times, so that more oil is passed through the second oil filtration network than once. It can be filtered.

Then, the third oil filtration plate 70 is close to the condenser connecting pipe 30, the space for installing the second oil filtration network 60 inside the case 10 is increased, the oil filtration by the second oil filtration network 60 The area becomes large.

Although the oil separator of the cooling apparatus according to the present invention has been described as being used in a refrigeration truck, it is not limited thereto, and may be used in any apparatus (eg, an air conditioner, etc.) using a refrigeration cycle.

As described above, according to the oil separator of the cooling apparatus according to the present invention, the refrigerant is guided repeatedly through the oil filtration member a plurality of times under the guidance of the refrigerant guide, thereby filtering a large amount of oil from the refrigerant.

In addition, since the filling amount of the oil filtration network is increased by securing the space for installing the oil filtration network to the maximum in the case, the oil filtration area is increased, so that a large amount of oil can be filtered from the refrigerant.

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

Claims (2)

A case 10 having a space therein; A condenser connecting pipe 20 / compressor connecting pipe 30 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 40 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 50 installed at an inner end of the compressor connecting pipe; And, In the oil separator of the cooling device comprising a second oil filtration network (60) of the type of loofah filled in the case, The second oil filtration network is filled in the lower side of the first oil filtration network, the refrigerant passing through the first oil filtration network in the upper side of the first oil filtration network after passing through the second oil filtration network in the lower side of the upper side The oil separator of the cooling device, characterized in that the refrigerant guide (80) is further installed to guide the flow to the condenser connection pipe side. According to claim 1, wherein the third oil filtration plate (70) consisting of the vertical portion 71 and the horizontal portion 72 on the side of the condenser connecting pipe is disposed close to the refrigerant inlet of the condenser connecting pipe to the second oil filtration network The oil separator of the cooling device, characterized in that the filling of the side of the third oil filtration plate from the lower side of the first oil filtration network.