SU1633246A1 - Device for determination of presence of air in refrigerating system - Google Patents

Abstract

The invention relates to refrigeration and can be used in plants using artificial cold. The purpose of the invention is to increase the reliability of the device and reduce energy consumption for the production of cold. Inside the housing 1 with a gap around the perimeter there is a closed cup 5 with a liquid refrigerant, the bottom 7 of which is set at the level of the lower edge 16 of the inlet 2 of the liquid refrigerant, and the outlet 4 is offset with respect to the inlet of the last edge 17 . In this case, the upper parts of the housing 1 and the glass are connected to the pressure gauges 14 and 15.2 Il.

Description

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The invention relates to refrigeration and can be used in plants using artificial cold.

The presence of air and other non-condensable gases in the refrigeration system leads to an increase in condensation pressure, and consequently, to a significant waste of electricity for the production of cold.

The aim of the invention is to improve the reliability of the device and reduce energy consumption for the production of cold.

In a device for determining the presence of air in the refrigeration system, a closed glass with two tubes of different lengths is placed inside the housing with a gap around it, filled and washed outside with a refrigerant, the bottom of the glass is located at the lower edge of the liquid refrigerant inlet and the outlet is located along relative to it with an upward displacement, while the body and the glass are equipped with pressure gauges.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one.

The device consists of a housing 1 with bottoms 3, a branch pipe 2 inlets and a branch pipe 4 outlets of a liquid refrigerant, a cup 5 installed with a gap of 6 around the perimeter of the shell with a bottom 7 and tubes 8 and 9 having different lengths inside the cup, shut-off valves 10- 13 and pressure gauges 14 and 15. FIG. 1 also shows the lower edge 16 and the upper edge 17 of the pipe 2 of the inlet of the liquid refrigerant (arrows indicate the direction of movement of the liquid refrigerant).

A device is installed, for example, in a pipeline (not shown) to drain a liquid refrigerant from a condenser (not shown) to a linear receiver (not shown).

The device works as follows.

The glass 5 is filled with a liquid refrigerant. For example, from housing 1 through valves 13, 10 and 11. Glass 5, installed with a gap 6 around the perimeter with respect to housing 1, is washed by a liquid refrigerant, for example, flowing from a condenser to a linear receiver (not shown), which has a refrigerating condensation temperature agent and, accordingly, a pressure equal to the pressure of condensation. This pressure is recorded by a pressure gauge 15. In glass 5, a saturated refrigerant vapor pressure is generated corresponding to the actual condensing temperature of the refrigerant. This pressure is recorded by a pressure gauge 14.

In the presence of air in the refrigeration system or other non-condensing

gas condensation pressure, fixed by the pressure gauge 15, exceeds the saturated vapor pressure of the liquid refrigerant in the glass 5 and fixed by the pressure gauge 14. The difference between the readings of the pressure gauges 14 and 15 indicates that there is air in the refrigeration system. Removing the air can be done manually, or automatically using an air separator. The proposed device can control the operation of the air separator. In the absence of air or other non-condensable gases in the refrigeration system, the readings of the pressure gauges 14 and 15 are equal.

0 The location of the bottom of the glass 5 level

the lower edge 16 of the nozzle 2 of the inlet of the liquid refrigerant, and the nozzle 4 of the output is shifted upwards relative to the nozzle of the entrance to the level of its upper edge 17

5 guarantees the constant presence of the glass 5 in the liquid refrigerant, which eliminates the possibility of any distortions in the readings.

Filling the cup 5 with a liquid cooling agent may, for example, be carried out in the following sequence. The valve 13 is connected by a tube (not shown) to the valve 10. A valve (not shown) is put on the valve 11, the free end of which is lowered into a vessel with water (not shown). Open the valves 13, 11 and 10 and keep them open until the sound of clicks in the vessel of water, indicating the appearance of a liquid refrigerant.

0 Close the valves 13, 11 and 10. The tube is disconnected from the valve 13, leaving 10 on the valve, and its free end is immersed in a container of water (not shown). The valve 10 is opened and kept open until the sound clicks in the vessel with water, i.e. before the appearance of vapor refrigerant. Thus, the glass 5 is filled with a liquid refrigerant. Close the valve 10. Remove from it

0 a tube and a manometer 14 is connected to it. A device for determining the presence of air or other non-condensable gases in the refrigeration system has no moving elements (membrane, system of levers, etc.). guarantees a clear, reliable fixation of the presence of air in the refrigeration system, which makes it possible to remove it in time and completely. This leads to a decrease in condensation pressure, and consequently, to a reduction in operating costs by 25%. The device is simple and does not require special manufacture.

Claims (1)

Apparatus of the Invention A device for determining the presence of air in a refrigeration system, consisting of a casing and nozzles of the inlet and outlet of a liquid refrigerant, characterized in that, in order to increase reliability and reduce energy consumption, it additionally equipped with pressure gauges and a glass for liquid refrigerant installed inside the body with a gap around the perimeter, the bottom of the glass is placed at the lower edge of the liquid refrigerant inlet pipe, and the outlet pipe is offset relative to the inlet pipe and located at the level of the upper edge of the latter, and the upper part of the body and glasses connected to pressure gauges. Fig 2