KR950003813B1 - Withdrawing apparatus for non condensible gas - Google Patents

Abstract

The apparatus for automatically extracting the non-condensated gas generated from condensator of a cooling system, comprises a spiral type tube (34) of with one end is connected to a coolant supply pipe (32) and another end is connected to a coolant recovery pipe (33); a gas extraction pipe (37) fixed to the upper part of a gas extraction tank (31); a filter vessel (47) connected to the lower side of the gas extraction tank via a line (45), and having a filter (46); a coupling (48) connected to the filter vessel (47); a three way solenoid valve (49) connected to an oil supply pipe (52) and an oil recovery pipe (50); and upper/lower float switches (36a,36b) for driving the solenoid valve (49).

Description

Non-Condensing Gas Automatic Extractor

1 is an installation diagram schematically showing a piping system of a conventional bleeding apparatus.

2 is a configuration diagram schematically showing another conventional extraction device.

3 is a configuration diagram schematically showing another conventional recording apparatus.

4 is a configuration diagram schematically showing another conventional extraction device.

5 is a partial cross-sectional view schematically showing the oil supply cycle of the non-condensable gas automatic extraction device according to the present invention.

6 is a partial cross-sectional view schematically showing the oil discharge cycle of the non-condensable gas automatic extraction device according to the present invention.

* Explanation of symbols for main parts of the drawings

31: additional tank 32: refrigerant supply pipe

33: refrigerant recovery tube 34: spiral tube

36a, 36b: upper and lower float switch 37: extraction pipe

40: solenoid valve 44: non-condensing gas supply pipe

46: filter 47: filter barrel

49: three-way solenoid valve 50: oil return pipe

52: oil supply pipe 53: pole

The present invention relates to a non-condensable gas automatic extractor, and more particularly to a non-condensable gas automatic extractor that can automatically extract the non-condensable gas generated in the condenser of the freezer system to the outside of the freezer system.

In general, in a low pressure refrigerator, the refrigerant gas includes a non-condensing gas, and the refrigerant gas is cooled by a cooling water passing through a cooling tank having such a refrigerant, and the refrigerant gas is returned to the evaporator in a condensed state. Gather at the top of a certain cardinal.

At this time, if a non-condensable gas such as moisture or air penetrates into the freezer system, it prevents the condensation of the refrigerant gas and increases the discharge pressure and temperature, thereby increasing the operating load, thereby adversely affecting the operation of the freezer system. It is necessary to extract the condensation gas out of the freezer.

Various types of devices for extracting non-condensable gas have been proposed. For example, the non-condensable gas scavenger as shown in FIG. 1 is operated during a refrigeration operation, where low-temperature refrigerant liquid is supplied to the outer tank 2 by opening the valve 1 from the condenser. Opening of the valve 3 supplies non-condensable gas and hot refrigerant gas from the condenser to the inner tank 4.

At this time, the refrigerant liquid supplied to the outer tank (2) is returned to the evaporator in a state in which mutual heat exchange with the high temperature refrigerant gas supplied to the inner tank (4) is evaporated, and the high temperature refrigerant gas is the inner tank (4). Return to the evaporator through the float valve (5) at the bottom, the non-condensing gas is collected on the upper tank (4). When the non-condensable gas in the inner tank 4 increases, the amount of condensation of the refrigerant gas in the inner tank 4 decreases, so that the amount of gas flowing from the condenser into the inner tank 4 also decreases, thereby reducing the pressure of the inner tank 4 and the condensation period. When the difference is reduced to a certain pressure, the pressure switch is operated to open the solenoid valve 6 and the non-condensable gas in the inner tank 4 is released into the atmosphere. However, in the conventional non-condensable gas scavenging device as described above, since the bleeding tank is composed of an inner tank and an outer tank, it is not only complicated in structure, but also requires manual operation of valves installed in the bleeding device and manually operates the bleeding device. The additional work is very inconvenient.

Another conventional extractor shown in FIG. 2 is a purge system, which is a differential pressure operated by a pressure difference between an evaporator and a condenser. This purge system will begin operation about 5 to 30 minutes after start of the freezer. This bleeding device flows the refrigerant from the condenser to the tube 8 wound on the outer surface of the inner cylinder 7, and the refrigerant gas containing the uncompounded gas is introduced into the outer cylinder 9 to cool the refrigerant. Each return to the evaporator. When the pressure difference between the evaporator and the condenser becomes small, the bleeding device operates the solenoid valve 10 to discharge the non-condensable gas in the outer cylinder 7 into the atmosphere. Such a bleeding device also has a problem that the structure is complicated and the manufacturing cost is increased because the bleeding tank is composed of the inner cylinder and the outer cylinder.

3 shows another conventional scavenging and recovering device, in which refrigerant vapor including air and non-condensable gas is introduced into the bleeding drum 11 in the condenser, and the refrigerant liquid in the condenser liquid chamber is lowered to the bleeding drum 11. It evaporates in an annular copper coil 134 wound spirally around the inner tank 12. As a result, the refrigerant vapor in the bleeding drum 11 is constricted, and the condensed refrigerant falls and is returned to the evaporator through the inner tank 13 and the flute chamber 14. During operation of the refrigerator, air and non-condensable gas accumulate on the top of the bleeding drum 11 so that the pressure in the bleeding drum 11 rises and the pressure difference between the condensing pressure and the bleeding drum internal pressure decreases, thereby opening the solenoid valve 15. Non-condensable gases are released to the atmosphere. Such a bleeding collection device also has the same disadvantages as that of the bleeding device shown in FIG.

FIG. 4 shows a conventional passive bleed recovery device, which discharges accumulated non-condensable gas on the condenser and calls it as moisture, non-condensable gas, and refrigerant so that the non-condensable gas and moisture are returned to the aircraft in the atmosphere. It is. When collecting the bleed, the evaporator side closing valve 17 and the condenser shaft pressure reducing valve 18 may be opened, and the bleeding device 19 may be operated with a bleed pump switch. On the other hand, when the refrigerant and water condensed in the air-cooled condenser 16 enters the bleeding tank 20, the refrigerant is separated into water due to the specific gravity difference, so that the water floats on the surface and the refrigerant accumulates at the bottom thereof. When the refrigerant reaches a certain amount, the float valve 21 is opened to enter the evaporator, and the water is discharged to the outside by opening the discharge valve 22. Such a bleeding recovery device requires skill and attention to the operation of the device because the system is operated manually.

The present invention has been invented to solve the above disadvantages.

An object of the present invention is to provide a non-condensable gas automatic extraction device that can automatically extract the non-condensable gas.

Another object of the present invention is to provide a non-condensable gas automatic scavenging device which simplifies the structure by using a single tank.

Another object of the present invention is to provide a non-condensable gas automatic addition device that is easy to manage without the need for a separate device operation.

The object of the present invention is installed in the extraction tank, the spiral end tube is connected to the refrigerant supply pipe, one end is connected to the refrigerant recovery pipe, and the extraction pipe is fixed to the upper end of the extraction tank to be located in the extraction tank through the line A solenoid valve which is installed and is operated by a hydraulic rise in the bleeding tank, a coolant gas supply pipe which is fixed to one lower side of the bleeding tank to supply refrigerant gas into the bleeding tank, and is connected through a line to the lower side of the bleeding tank through a line And a three-way solenoid valve connected to the filter cylinder through a coupling to the filter cylinder, and connected to an oil supply pipe and an oil recovery pipe, and installed on a pole extending downward from the upper end of the bleeding tank. Non-condensing gas wells with upper and lower float switches to operate directional solenoid valves, respectively Can be achieved by

The non-condensing gas automatic extractor of the present invention will be described with reference to FIGS. 5 and 6 as follows.

5 shows the oil supply cycle of the automatic non-condensing gas bleeding apparatus according to the present invention, wherein the non-condensing gas bleeding apparatus 30 is mounted in the bleeding tank 31 and the bleeding tank 31 and one end thereof is a condenser. The other end of the refrigerant supply pipe 32 is provided with a spiral tube 34 connected to the refrigerant recovery pipe 33 of the evaporator. In addition, the upper float switch 36a and the lower float switch 36b are provided in the pole 53 fixed to the upper end 35 of the bleeding tank 31 and extending downward. One side of the upper end (35) of the bleeding tank (31) is fixed to the traction pipe (37) to be located in the bleeding tank (31), the purge transistor 38 is fixed to the upper portion of the bleeding pipe (37) It is. In addition, the solenoid valve 40 through the line 39 is provided on one side of the extraction pipe 37, the check valve 41 is fixed to the solenoid valve 40 via the coupling.

A strainer 42 and a check valve 43 are provided in one line at a lower side of the bleeding tank 31, and a non-condensable gas supply pipe 44 is fixed to the strainer 42 so as to be positioned in the bleeding tank 31. have. In addition, a filter cylinder 47 having a filter 46 therein is connected to the lower portion of the bleeding tank 31 through a line 45, and the filter cylinder 47 is connected in three directions by a coupling 48. The solenoid valve 49 is provided. The oil return pipe 50 is fixed to the three-way solenoid valve 49.

Referring to the operation of the non-condensing gas automatic extraction device of the present invention configured as described above are as follows. The refrigerant gas supplied from the evaporator to the condenser by the cooling water flowing through the tube installed inside the condenser (not shown) of the refrigerator during condenser operation is condensed into a relatively low temperature refrigerant liquid, and the low temperature refrigerant The liquid is stored in the lower part of the condenser, while non-condensable gas that does not condense even when heat-exchanging with the cooling water flowing through the tube in the condenser, and the refrigerant gas that is relatively hot because the heat-exchange with the cooling water does not occur, is Gathered at

Therefore, the low temperature refrigerant liquid stored in the lower portion of the condenser passes through the spiral tube 34 through the orifice 51, while the non-condensing gas and the high temperature refrigerant gas collected at the upper portion of the condenser are check valves. Via the 43 and the strainer 42, it is supplied into the bleeding tank 31 through the non-condensable gas supply pipe 44.

At this time, the non-condensing gas and the high-temperature refrigerant gas supplied into the additional apparatus 31 through the non-condensing gas supply pipe 44 exchange heat with the low-temperature refrigerant liquid passing through the spiral tube 34. The refrigerant liquid passes through the refrigerant recovery pipe 33 in an evaporated state and is supplied to an evaporator (not shown), and the refrigerant gas is condensed and contained in oil filling the bleeding tank 31.

On the other hand, the non-condensing gas supplied to the bleeding tank 44 via the non-condensing gas supply pipe 44 is not dissolved in the oil filling the bleeding tank 44 and is disposed on the upper portion of the bleeding tank 44. Are gathered. Therefore, the non-condensable gas passes through the extraction pipe 37 and is discharged into the dash through the check valve 41.

Thus, as shown in FIG. 5, during the oil supply cycle, high pressure oil is supplied into the bleeding tank 31 through the three-way solenoid valve 48 and the filter 46 through the oil supply pipe 52 and the oil level. As it rises, the non-condensable gas collected on the upper portion of the bleeding tank 31 is compressed.

At this time, when the oil is continuously supplied, the hydraulic pressure in the bleeding tank 31 is increased, whereby the solenoid valve 40 is operatively opened, so that the non-condensable gas in the bleeding tank 31 is supplied to the bleeding pipe 37 and the line. (39), it is discharged to the atmosphere via the solenoid valve 40 and the check valve 41.

Meanwhile, referring to FIG. 6, when the upper float switch 36a reaches the upper portion due to the rise of the oil level, the three-way solenoid valve 46 operates to block the oil supply pipe 52 and close the oil return pipe 50. The oil containing the refrigerant gas condensed by heat exchange with the refrigerant liquid passing through the spiral tube 34, ie, the refrigerant liquid, is recovered from the bleeding tank 31 toward the compressor (not shown).

At this time, the refrigerant liquid contained in the oil recovered by the compressor is evaporated by the heat of compression in the cold compressor and converted into refrigerant gas, and the refrigerant gas is supplied to the condenser via a path not shown, and the refrigerant liquid is evaporated. The separated oil is supplied to an oil tank (not shown) installed at the lower end of the compressor.

On the other hand, as the oil in the bleeding tank 31 is recovered to the oil recovery pipe 50, when the oil level in the bleeding tank 31 descends to reach the lower float switch 36b, the three-way solenoid valve 49 It operates again to cut off the oil return pipe 50 and open the oil supply pipe 52 so that high pressure oil is supplied from the oil tank into the bleeding tank 31 so that a new cycle is started and the bleeding action is repeatedly performed. You lose.

As described above, the non-condensable gas automatic bleeding apparatus of the present invention is a very useful invention in the industry that the non-condensable gas can be automatically discharged to the outside air without a separate device by a simple structure.

Claims (1)

Spiral tube (34) installed in the bleeding tank (31), one end of which is connected to the refrigerant supply pipe (32), and the other end of which is connected to the refrigerant recovery pipe (33), and the bleeding tank (31) to be located in the bleeding tank (31). The solenoid valve 40, which is installed through the line 39 in the extraction pipe (37) fixed to the upper end of the) and is operated by the hydraulic lifting in the extraction tank (31), and on the lower side of one side of the extraction tank (11) A non-condensable gas supply pipe 44 which is fixed and supplies refrigerant gas into the bleeding tank 31, and a filter cylinder having a filter 46 built therein, connected to a lower portion of the bleeding tank 31 through a line 45. A three-way solenoid valve 49 connected to the filter barrel 47 via a coupling 48 and connected to an oil supply pipe 52 and an oil recovery pipe 50; The upper and lower sides fixed to the upper end of the 31 and installed in the downwardly extending pole 53 to operate the three-way solenoid valve, respectively A non-condensable gas automatic bleeding device comprising float switches (36a, 36b).