F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
341/4
F25D 21/08 (2006.01) F25D 21/00 (2006.01) F25D 29/00 (2006.01) G05D 23/275 (2006.01)
Patent
CA 1207406
ABSTRACT Control unit for refrigerators or freezers A refrigerator or freezer of the type having an electrical defrost heater associated with its evaporator has a control unit including a switch device with a first pair of contacts (16, 17) controlling the cyclic cutting-in and cutting-out of a compressor motor and a second pair of contacts (16, 18), sharing a common movable contact (16) with the first pair, controlling the periodic energisation of the defrost heater. Closure of the second pair of contacts is normally obstructed by a stop member (22) which is movable by a ratchet mechanism (24, 26) or other means responsive to a predetermined number of switching cycles of the compressor motor to a defrost position in which a notch (23) in the stop member (22) permits movement of the movable contact to close the second pair of contacts (16, 18) and energise the defrost heater.
420987
Gowling Lafleur Henderson Llp
Ranco Incorporated
LandOfFree
Control unit for refrigerator or freezer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control unit for refrigerator or freezer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control unit for refrigerator or freezer will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1328540