SU405001A1 - METHOD FOR DEFROSTING A COOLING AIR COOLER - Google Patents

Description

one

The invention relates to refrigeration engineering, in particular, to methods for thawing from other air coolers of refrigeration machines.

There are known defrosting chillers of a refrigerating manganin with a compressor and a linear receiver by supplying hot refrigerant vapor from the compressor to the air cooler.

The purpose of the invention is to intensify the defrosting process.

This is achieved by supplying refrigerant vapor to the air cooler at the same time in two zones: to the top and through the linear receiver to the bottom and after equalizing the pressures in the air cooler and in the receiver to the last coolant from the air cooler.

The drawing shows a diagram of a chiller in which the described method of defrosting an air cooler is dried.

Pipeline 1 is designed to supply hot refrigerant vapor from a compressor to a condenser 2 connected by a liquid pipe 3 and a steam balancing pipe 4 to a linear receiver 5. Pipeline 6 with a solenoid valve 7 is designed to supply liquid refrigerant 8 to the liquid cooler, pipe 9 -. for suctioning refrigerant vapor from the air cooler 8 through the solenoid valve 10.

Pipeline 11 is designed for delivery through a solenoid valve 12 hot refrigerant vapor to the air cooler 8 and pipe 13 to drain the liquid refrigerant from

air cooler 8 through the solenoid valve 14. The air cooler is equipped with a fan 15.

At the beginning of the defrost cycle, the fan 15 and solenoid valves 7 and 10, installed on pipelines 6 and 9, are turned off, and include solenoid valves 12 and 14, installed on pipelines 11 and 13. At the initial moment of defrosting due to the pressure difference, the coolant vapor from the compressor through the pipeline 11 through the valve 12 nostunayut into the upper zone of the air-cooler 8, and through the valve 14 through the pipeline 13 hot vapors come from the linear receiver 5 to the lower zone of the air-cooler 8,

where the liquid refrigerant is heated.

After equalizing the pressures in the air cooler 8, the condenser 2 and the linear receiver 5, the liquid refrigerant line 13 through the valve 14 under the action of static pressure is drained from the air cooler to the linear receiver 5 and the defrost is completed with hot bunks of the refrigerant supplied to the air cooler 8 but the pipeline

eleven.

To create a static head, the height difference between the air cooler and the linear receiver must be at least 1.5 - 2 m.

Subject invention

Method of defrosting the MaujHHbi refrigeration air cooler with a compressor and a linear receiver by supplying hot vapors

the refrigerant from the compressor to the air cooler, characterized in that, with the purpose of intensifying the process, refrigerant vapors to the air cooler are simultaneously fed to

two zones: in the upper and through the linear receiver in the lower and after equalizing the pressures in the air cooler and in the receiver, the liquid refrigerant from the air cooler is drained into the last one.