Motor protector receptacle for a refrigeration compressor

Electrical generator or motor structure – Dynamoelectric – Rotary

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Details

361 25, 318473, 337372, 337380, H02K 1100

Patent

active

047346027

ABSTRACT:
A device for mounting a thermal overload protector to the motor of a hermetic refrigeration compressor. The overload protector is temperature responsive and is operative to protectively interrupt the current to the motor when the stator windings, rotor, or other heat source in the compressor overheats due to a compressor overload. The protector's mounting device is a plastic receptacle having a shield connected by an integral hinge. The hinge not only facilitates manufacturing the receptacle as a unitary part by an injection molding process, but also enables the shield to be opened for inserting the overload protector into the receptacle. The overload protector is held firmly in place by a U-shaped bracket integrally disposed inside the receptacle. A U-shaped groove runs along the inner edge of the bracket and is designed to slidingly engage protectors of various shapes. The receptacle includes an opening on one side of the protector opposite the heat retaining shield. The receptacle is mounted so that the opening exposes the overload protector to the heat source while the shield traps heated refrigerant around the overload protector and also helps minimize heat loss from the protector, thus improving its response to heat resulting from overload.

REFERENCES:
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patent: 4045761 (1977-08-01), Peterson
patent: 4061935 (1977-12-01), Kandpal
patent: 4163913 (1979-08-01), Barratt
patent: 4236092 (1980-11-01), DiFlora
patent: 4308517 (1981-12-01), Peterson
patent: 4499517 (1985-02-01), Lisauskas
patent: 4503347 (1985-03-01), Bergman
patent: 4567390 (1986-01-01), Stewart
patent: 4571517 (1986-02-01), Chastine
patent: 4620425 (1986-11-01), O'Grady
patent: 4641121 (1987-02-01), Boulanger

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