Refrigeration – Processes – Circulating external gas
Reexamination Certificate
2007-05-08
2007-05-08
Jones, Melvin (Department: 3744)
Refrigeration
Processes
Circulating external gas
C062S271000
Reexamination Certificate
active
11094081
ABSTRACT:
A refrigeration-based compressed-gas dryer comprises a group of heat exchangers (10), this group of heat-exchangers including a gas-to-gas heat exchanger (20), an evaporator (30), a condensate separator (50) and at least a refrigerating circuit (40), wherein in said gas-to-gas heat exchanger (20) there is provided a pre-cooling section (22), where heat is exchanged between a mixture of compressed gases to be dried entering said group of heat exchangers (10), and a heating section (24) for a mixture of dried gases exiting a condensate separator (50), wherein in said evaporator (30) there is provided a cooling section (32), where heat is exchanged between said mixture of compressed gases to be dried exiting the gas-to-gas heat exchanger (20), and an evaporating section (34) for a refrigerant medium, where said mixture of compressed gases is cooled down to a desired dew point. According to the present invention, said group of heat exchangers (10) comprises a set of finned or embossed plates (21, 31, 33), which are stacked and joined with each other so as to be adapted to create a number of passages for the counter-current flow and/or cross flow and/or mixed flow of said gases, wherein said group of heat exchangers is provided as a unitary piece.
REFERENCES:
patent: 2142856 (1939-01-01), Lieb et al.
patent: 5715696 (1998-02-01), Salvagno et al.
patent: 6202424 (2001-03-01), Hattori et al.
patent: 6470693 (2002-10-01), Dickey
Domnick Hunter Hiross S.p.A.
Jones Melvin
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