Apparatus and method for protecting a compressor in a heat pump

Details Apparatus and method for protecting a compressor in a heat pump Apparatus and method for protecting a compressor in a heat pump

1990-06-04

1991-10-08

Tanner, Harry B.

Refrigeration

Processes

Lubricant handling

62193, 62126, 361 22, F25B 4302

Patent

active

050542931

ABSTRACT:
Apparatus for protecting a compressor operating in a refrigeration device such as a heat pump includes a heater for maintaining lubricating oil contained in a crankcase of the compressor at a preselected temperature that will prevent the oil from absorbing any refrigerant. A control circuit is connected to an alternating current source of electrical power for controlling the operation of the compressor. The control circuit includes a thyristor having a blocking state and a conducting state. If the heater fails to operate, the thyristor will be disposed in the blocking state thereby preventing the compressor from operating. The control circuit also includes a trigger for changing the thyristor from the blocking state to the conducting state, and a full wave bridge or rectifier for converting the voltage drop across the thyristor from an alternating current voltage to a direct current voltage.

REFERENCES:
patent: 3381226 (1968-04-01), Jones et al.
patent: 3577741 (1971-05-01), Shaw
patent: 3920955 (1975-11-01), Nakata
patent: 4004431 (1977-01-01), Hildreth

Affiliated with

Also associated with

Rating

Apparatus and method for protecting a compressor in a heat pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for protecting a compressor in a heat pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for protecting a compressor in a heat pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-249900