Francis T Pallanch

US Patent:

45547998, Nov 26, 1985

Filed:

Oct 29, 1984

Appl. No.:

6/665565

Inventors:

Francis T. Pallanch - Minneapolis MN

Assignee:

Vilter Manufacturing Corporation - Milwaukee WI

International Classification:

F25B 110

US Classification:

62509

Abstract:

A refrigeration system comprises an evaporator which feeds uncompressed vapor to a first (low) stage compressor, a second (high) stage compressor which receives low compression vapor from the first stage and feeds high compression vapor to a condenser, and a receiver which receives liquid from the condenser and ultimately feeds it to the evaporator. Desuperheater apparatus, comprising a pressure vessel (subcooler) and a heat exchanger, is provided to remove excess heat (superheat) from the compressed vapor fed by the first stage to the second stage to thereby improve thermal efficiency of the system and to reduce the mass of refrigerant to be handled by the second stage thereby enabling use of a smaller, more economical second stage compressor. The pressure vessel contains a bath of liquid which is supplied from the receiver and then fed to the evaporator. Compressed vapor from the first stage is forced through and cooled by the liquid bath in the pressure vessel and is then fed to the second stage, along with vapor which evaporates from the liquid bath.