SU1285275A1 - Intermediate cooler of multistage compression refrigerating machine - Google Patents

Abstract

The invention relates to a refrigerating machinery and may increase operational reliability and intensify heat exchange. The housing 1 is equipped with a cooling jacket 11 connected to the feed branch of the heat exchanger in the first section (C) 8 and to the discharge section in the second section 12. The refrigerant vapor through the nozzle 9, in the critical section of which the nozzle 10 is installed, enters the mixer 7 and C 8. As the mixer 7 is inserted into the body tangentially, large drops of coolant and oil drops are deposited on jacket II in C. 8. Without evaporating the liquid passes into C. 12, falls on jacket II, where the high-pressure liquid refrigerant flows and evaporates. The oil released from the refrigerant is discharged into a sump 13 having a float regulator. 1 h. apt. 3 il. b

Description

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The invention relates to refrigeration engineering, in particular to intercoolers of multistage (two- and three-stage) compression refrigeration machines.

The purpose of the invention is to increase the operational reliability and the intensification of heat transfer.

FIG. 1 shows schematically an intercooler; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The cooler includes a housing 1, divided by transverse partitions 2 into three sections, a heat exchanger 3 with a supply 4 and a discharge 5 branches and ribs 6, a mixer 7 connected to the first section 8, equipped with a nozzle 9 and a nozzle 10, a shirt 11 placed in the first section 8 and in the second section 12, a settling tank 13 with a float level regulator, a branch pipe for discharging refrigerant vapor.

The cooler works as follows.

Refrigerant vapor downstream of a low-pressure compressor through a Laval nozzle 9, in a critical section of which nozzles 10 introduce liquid refrigerant droplets, enter mixer 7, and from there tangential injection of large refrigerant drops and oil droplets are deposited on the jacket 11 in the first section 8. The refrigerant vapor flow with fine droplets of the refrigerant occurs labyrinthly through the guide fins 6 and through the third section enters through the nozzle 14 into the high-pressure compressor.

Without evaporation of liquid and oil droplets separated in the first cavity, through the gap in the partition 2 between the first and the second / 1-L

These sections pass into the second section and fall on the jacket 11, where the high-pressure liquid refrigerant flows, the heat of which evaporates the intermediate temperature refrigerant and boils the refrigerant dissolved in the lubricating oil. The oil released from the refrigerant is discharged into the sump 13 and, as it accumulates, is transferred to the crankcase of the low pressure compressor.

Claims (2)

1. An intercooler of a multi-stage -compression chiller containing a horizontal body divided by transverse partitions into three sections, a heat exchanger placed in all sections with supply and discharge branches, the last of which is connected to 20 of the suction line of a high pressure compressor, a mixer connected to the first section of the housing and equipped with a nozzle and nozzle, characterized in that, in order to increase operational reliability and enhance heat exchange, the housing along the entire perimeter of the first section is equipped with a cooling jacket connected to the heat exchanger branch in the first section and to the outlet in the second, the nozzle is installed in the nozzle throat, The 3Q mixer is inserted into the body through the jacket tangentially, and the partition between the first and second sections is installed with a gap relative to the jacket. 2. A cooler according to claim 1, characterized in that the housing in the second section is provided with a sump having a float level regulator. -five FIG. 2 Fig.Z