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US 5,141,407 AGranted
Scroll machine with overheating protection
AssigneeCopeland Corporation
InventorsJeffery D. Ramsey, Jean-Luc Caillat, Sunil S. Kulkarni
Life of this patent
Estimating the term…
Abstract
A thermally responsive valve arrangement for scroll motor-compressor high temperature protection, which causes a high-side to low-side leak when excessive discharge gas temperatures are encountered, thereby causing the motor protector to trip and deenergize to motor. A unique valve per se is also disclosed.
Claims22
A scroll compressor comprising:
- (a) an hermetic shell;
- (b) a first scroll member disposed in said shell and having a first spiral wrap on one face thereof;
- (c) a second scroll member disposed in said shell and having a second spiral wrap on one face thereof, said wraps being extermeshed with one another;
- (d) a motor in said shell for causing said first scroll member to orbit with respect to said second scroll member whereby said wraps will create pockets of progressively decreasing volume from a suction zone at suction pressure to a discharge zone at discharge pressure;
- (e) means for introducing suction gas into said shell, said suction gas providing cooling for said motor;
- (f) passage means defining a passageway in fluid communication at one end with a sensing zone of compressed gas from said compressor which is at a pressure higher than said suction pressure and at the other end with said suction zone;
- and
- (g) normally closed thermally responsive valve means in said passage means for controlling gas flow therethrough, said valve operating in response to a sensed gas temperature in said sensing zone in excess of a predetermined value to open said passage means and thereby permit the leakage of compressed gas from said sensing zone to said suction zone.
5 more elements
A scroll compressor comprising:
- (a) an hermetic shell;
- (b) a first scroll member disposed in said shell and having a first spiral wrap on one face thereof;
- (c) a second scroll member disposed in said shell and having a second spiral wrap on one face thereof, said wraps being entermeshed with one another;
- (d) a motor in said shell for causing said first scroll member to orbit with respect to said second scroll member whereby said wraps will create pockets of progressively decreasing volume from a suction zone at suction pressure to a discharge zone at discharge pressure;
- (e) a partition across said shell defining a discharge gas muffler;
- (f) a discharge gas passage extending from said discharge zone to said discharge gas muffler;
- (g) means for introduction suction gas into asid shell, said suction gas providing cooling for said motor;
- (h) passage means defining a passageway extending from said discharge gas muffler to said suction zone;
- and
- (i) normally closed thermally responsive valve means in said passage means for controlling gas flow therethrough, said valve operating in response to a sensed gas temperature in said discharge gas muffler in excess of a predetermined value to open said passage means and thereby permit the leakage of compressed gas from said discharge gas muffler to said suction zone.
7 more elements
Dependencies are inferred from the claim text.