Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Defrost control system for a refrigeration heat pump apparatus

Defrost control system for a refrigeration heat pump apparatus

US Patent 4538420 · Granted Sep 3, 1985

Estimated economic value: $14,263,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Humidistat reset control1994
Error based zone controller1994
Zone control system providing synchronization of system operation with the zone 1991
Thermostat with mechanical heat anticipation and droop control1991
Method and apparatus for improving cooling of a compressor element in an air con1989
Adaptive refrigerant control algorithm1989
Thermostatic control without temperature droop using duty cycle control1989
Thermostatic control without temperature droop using duty cycle control1988
Minimizing off cycle losses of a refrigeration system in a heating mode1988
Zone control system for energy conservation1986
Integrated control system for induced draft combustion1985
Thermostat for control of an add-on heat pump system1984