SU827902A1 - Method of thawing air cooler of double-stage compression refrigerating machine - Google Patents

Description

The invention relates to refrigeration.

Known methods for thawing an air cooler of a two-stage compression refrigeration machine containing 5 intermediate vessel between the stages and a heat exchanger-regenerator, the cooling cavity of which is included between the air cooler and the compressor of the first stage, by supplying hot refrigerant vapor to the air cooler after the second stage compressor and draining the resulting liquid [ 11 A disadvantage of the known methods is the duration of the thawing process with 15 having one air cooler in the machine, since tsya repeatedly periodically fed into the air cooler hot vapors and draining the liquid formed therefrom. 20

The aim of the invention is to reduce the thawing time when there is one air cooler in the machine by continuously supplying hot refrigerant vapor to it and draining the resulting liquid. 25

The goal is achieved in that only part of the flow of refrigerant vapor enters the air cooler after the second stage compressor, the resulting liquid is discharged into the cooling cavity of the heat exchanger-30 ka-regenerator, the remaining second part of the vapor stream is sent to the heating cavity, which is condensed by evaporation of the liquid of the first part flow, after which the obtained liquid of the second part of the stream is throttled and collected in the intermediate vessel in the form of a layer, the resulting liquid vapors of the first part of the stream are sucked off by compress rum of the first stage and served in an intermediate vessel under a layer of liquid, and the entire vapor phase from the intermediate vessel is sucked off by a compressor of the second stage.

The drawing schematically shows a machine in which the described method is carried out.

The machine contains a compressor 1 of the first stage, compressor 2 of the second stage, an intermediate vessel 3, a heat exchanger-regenerator 4, a line 5 of hot vapor of a refrigerant, a line of 6 hot vapors to an air cooler 7, a line of 8 hot vapors to a heating cavity of a heat exchanger-regenerator, a line of 9 to the intermediate vessel 3 from the heating cavity of the heat exchanger-regenerator, the suction line 10 to the compressor 1 of the first stage, the discharge line 11 from the compressor of the first stage, the throttle valve 12. In addition, the figure shows the oil separator 13 after the comp spring 1, oil separator 14 after compressor 2, filter 15 and capacitor 16.

The machine operates when thawing the air cooler 7 as follows.

The compressor 2 of the second stage sucks the vapor phase from the intermediate vessel 3 and pumps it into the line 5 of hot refrigerant vapor, from which the first part of the stream is supplied through line 6 to the air cooler 7 and the resulting liquid is drained from here into the cooling cavity of the heat exchanger-regenerator 4, and the second part of the stream fed through line 8 into the heating cavity of the heat exchanger-regenerator. In this case, the second part of the flow of refrigerant vapor condenses and the liquid obtained through line 9 is supplied through the throttle valve 12 to the intermediate vessel 3, and the liquid of the first part of the stream is vaporized, the resulting vapor is sucked from the cooling cavity of the heat exchanger-regenerator through the filter 15 along line 10 and injected by the compressor 1 the first stage through the oil separator 13 along line 11 into the intermediate vessel under the liquid layer. The resulting vapor phase in the intermediate vessel is created due to the arrival of 1 refrigerant vapor compressed in the compressor, as well as due to the evaporation of the liquid entering it both due to its throttling and due to its boiling when these compressed superheated vapors are cooled to the state of their evaporation.

The economic efficiency of the proposal is expressed in the fact that the life of the refrigeration machine is increased due to a significant reduction in the time spent on the thawing process of the air cooler.

Claims (1)

Claim A method for thawing an air cooler of a two-stage compression refrigeration machine ⁵ , comprising an intermediate vessel between the steps and a heat exchanger, the cooling cavity of which is connected between the air cooler and the compressor of the first stage, by supplying hot refrigerant vapor to the air cooler after the second stage compressor and draining the resulting liquid, characterized in that , in order to reduce the thawing time in the presence of one air cooler in the 5th machine, only the part of the steam stream is supplied to the latter in the refrigerant after the compressor of the second stage, the resulting liquid is poured into the cooling cavity of the heat exchanger-re0 generator, in the heating cavity of which the remaining second part of the vapor stream is sent, which is condensed by evaporation of the liquid of the first part of the stream, after which the obtained liquid of the second 5 part of the stream is throttled and collected in the intermediate vessel in the form of a layer, the formed vapor of the liquid of the first part of the stream is sucked off by the compressor of the first stage and fed into the intermediate vessel under the 3rd layer of liquid, and the entire steam coming from the intermediate receptacle is aspirated by the compressor of the second stage.