Refrigeration – With indicator or tester – Condition sensing
Reexamination Certificate
2006-07-04
2006-07-04
Norman, Marc (Department: 3744)
Refrigeration
With indicator or tester
Condition sensing
C062S130000, C062S201000, C062S212000, C062S226000
Reexamination Certificate
active
07069734
ABSTRACT:
A method and apparatus for detecting surge in a refrigeration system that includes a centrifugal compressor having an impeller and a compressor entrance, an evaporator that receives a fluid refrigerant, a suction line that flows the refrigerant from the evaporator to the compressor entrance. The evaporator includes a heat-exchange coil supplied with a liquid through a supply line entering the evaporator. The liquid is disposed in a heat-exchange relationship with the refrigerant within the evaporator. The method and apparatus automatically and periodically performing the steps of measuring a fluid temperature of the liquid proximate the supply line entering the evaporator; measuring a refrigerant temperature of the refrigerant proximate the compressor entrance; and using the fluid temperature and the refrigerant temperature to detect surge in the refrigeration system.
REFERENCES:
patent: 2696345 (1954-12-01), Hopper
patent: 3555844 (1971-01-01), Fleckenstein et al.
patent: 4046490 (1977-09-01), Rutshtein et al.
patent: 4151725 (1979-05-01), Kountz et al.
patent: 4177649 (1979-12-01), Venema
patent: RE30329 (1980-07-01), Rutshtein et al.
patent: 4265589 (1981-05-01), Watson et al.
patent: 4282718 (1981-08-01), Kountz et al.
patent: 4363596 (1982-12-01), Watson et al.
patent: 4464720 (1984-08-01), Agarwal
patent: 4493608 (1985-01-01), Paul
patent: 4562531 (1985-12-01), Enterline et al.
patent: 4581900 (1986-04-01), Lowe et al.
patent: 4686834 (1987-08-01), Haley et al.
patent: 5306116 (1994-04-01), Gunn et al.
patent: 5537830 (1996-07-01), Goshaw et al.
patent: 5553997 (1996-09-01), Goshaw et al.
patent: 5726891 (1998-03-01), Sisson et al.
patent: 5746062 (1998-05-01), Beaverson et al.
patent: 5873257 (1999-02-01), Peterson
patent: 5894736 (1999-04-01), Beaverson et al.
patent: 5971712 (1999-10-01), Kann
patent: 6202431 (2001-03-01), Beaverson et al.
patent: 6213724 (2001-04-01), Haugen et al.
patent: 6427464 (2002-08-01), Beaverson et al.
patent: 6513333 (2003-02-01), Sugitani
patent: 2002/0170304 (2002-11-01), Beaverson et al.
patent: 2003/0161715 (2003-08-01), McKee et al.
patent: 2004/0031286 (2004-02-01), Bodell et al.
AAF-McQuay Inc.
Norman Marc
Patterson Thuente Skaar & Christensen P.A.
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