Refrigeration – With indicator or tester – Operatively correlated with automatic control
Reexamination Certificate
2006-11-14
2006-11-14
Jiang, Chen Wen (Department: 3744)
Refrigeration
With indicator or tester
Operatively correlated with automatic control
C062S323300, C318S434000, C318S799000
Reexamination Certificate
active
07134290
ABSTRACT:
In a transport refrigeration system which is susceptible to having its drive motors connected to a power source in reverse phase relationship to thereby operate the drive motors in reverse, provision is made to measure the current flow to the motors during operation in each direction and for comparing those current flows to determine which is greater and therefore representative of operation in the proper direction. A backup method is also provided for sensing the ambient temperature of the air downstream of the condenser coil, both before and during motor operation to determine whether the temperature during motor operation is greater than that prior to operation to thereby indicate a proper connection.
REFERENCES:
patent: 57055778 (1982-04-01), None
patent: 2000023499 (2000-01-01), None
Awwad Nader S.
Mallinson Thomas F.
Reason John R.
Carrier Corporation
Jiang Chen Wen
Wall Marjama & Bilinski LLP
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