Refrigeration – Processes – Circulating external gas
Reexamination Certificate
2007-05-22
2007-05-22
Tyler, Cheryl (Department: 3744)
Refrigeration
Processes
Circulating external gas
C062S176500, C062S156000
Reexamination Certificate
active
10970958
ABSTRACT:
A system and humidity control method is provided for a multi-stage cooling system having two or more refrigerant circuits that balances humidity control and cooling demand. Each refrigerant circuit includes a compressor, a condenser and an evaporator. A hot gas reheat circuit having a hot gas reheat coil is connected to one of the refrigerant circuits and is placed in fluid communication with the output airflow from the evaporator of that refrigerant circuit to provide additional dehumidification to the air when humidity control is requested. The hot gas reheat circuit bypasses the condenser of the refrigerant circuit during humidity control. Humidity control is performed during cooling operations and ventilation operations. During a first stage cooling operation using only one refrigerant circuit and having a low cooling demand, the request for humidity control activates the hot gas reheat circuit for dehumidification and activates a second refrigerant circuit to provide cooling capacity. The hot gas reheat circuit is sized to match the cooling provided by the evaporator so that air cooled by passing through the evaporator can be reheated. Excess refrigerant is passed into the inactive cooling circuit so that proper pressure and temperature can be maintained in the active reheat circuit and so that high head pressure that can damage the compressor can be avoided. During a second stage cooling operation using two or more refrigerant circuit and having a high cooling demand, the request for humidity control is suspended and is initiated only upon the completion of the second stage cooling demand.
REFERENCES:
patent: 2961844 (1960-11-01), McGrath
patent: 3105366 (1963-10-01), Atchison
patent: 3264840 (1966-08-01), Harnish
patent: 3316730 (1967-05-01), Lauer
patent: 3402564 (1968-09-01), Nussbaum
patent: 3798920 (1974-03-01), Morgan
patent: 4018584 (1977-04-01), Mullen
patent: 4182133 (1980-01-01), Haas et al.
patent: 4189929 (1980-02-01), Russell
patent: 4270362 (1981-06-01), Lancia et al.
patent: 4711094 (1987-12-01), Ares et al.
patent: 4942740 (1990-07-01), Shawn et al.
patent: 5065586 (1991-11-01), Shapiro-Baruch
patent: 5477697 (1995-12-01), Wharton et al.
patent: 5509272 (1996-04-01), Hyde
patent: 5622057 (1997-04-01), Bussjager et al.
patent: 5631258 (1997-05-01), Borcherding et al.
patent: 5651258 (1997-07-01), Harris
patent: 5823006 (1998-10-01), Jung
patent: 5992160 (1999-11-01), Bussjager et al.
patent: 6035653 (2000-03-01), Itoh et al.
patent: 6055818 (2000-05-01), Valle et al.
patent: 6272870 (2001-08-01), Schaeffer
patent: 6276149 (2001-08-01), Katayama et al.
patent: 6381970 (2002-05-01), Eber et al.
patent: 6427461 (2002-08-01), Whinery et al.
patent: 6574976 (2003-06-01), Takano et al.
patent: 6612119 (2003-09-01), Eber et al.
patent: 6622500 (2003-09-01), Archibald et al.
patent: 6644049 (2003-11-01), Alford
patent: 6666040 (2003-12-01), Groenewold et al.
patent: 6705093 (2004-03-01), Taras et al.
patent: 6826921 (2004-12-01), Uselton
patent: 2004/0089002 (2004-05-01), Rayburn
patent: 2004/0089015 (2004-05-01), Knight et al.
patent: 2004/0134217 (2004-07-01), Itoh et al.
patent: 2004/0144111 (2004-07-01), Matsuoka
SPORLAN, 3-Way Valves (Installation and Servicing Instructions), Sporlan Valve Company, Washington, MO Jun. 2001 / Bulletin 30-21.
SPORLAN, 3-Way Valves (The Right Solenoid Valve for any Job), Sporlan Valve Company, Washington, MO Jun. 2001 / Bulletin 30-20.
SPORLAN, Type 5D Three-Way Heat Reclaim Valve for Refrigerants 12-22-134a-502, Sporlan Valve Company, Washington, MO Dec. 1995 / Bulletin 30-10-1.
SPORLAN, Solenoid Valves, Sporlan Valve Company, Washington, MO Jan. 1993 / Bulletin 30-10.
Knight John Terry
Pickle Stephen Blake
Weber Nathan Andrew
McNees Wallace & Nurick LLC
Tyler Cheryl
York International Corporation
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