Scroll machine with overheating protection
First Claim
1. A scroll compressor comprising:
- a hermetic shell;
a first scroll member disposed in said shell and having a first spiral wrap on one face thereof;
a second scroll member disposed in said shell and having a second spiral wrap on one face thereof, said wraps being intermeshed with one another;
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 to a discharge zone;
a passageway having a first inlet in fluid communication with said discharge zone and an outlet in fluid communication with said suction zone; and
normally closed valve member movable between a closed position where fluid flow through said passageway is prohibited and an open position where fluid flow through said passageway is permitted, said valve member moving from said closed position to said open position in response to a sensed temperature in excess of a predetermined value, said valve member being disposed between said first inlet and said outlet only when said valve member is in said closed position.
3 Assignments
0 Petitions
Accused Products
Abstract
A thermally responsive valve assembly 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 de-energize the motor. The valve assembly includes means for ducting the excessive temperature discharge gas to the lower portion of the motor/compressor shell to the motor to circulate the high temperature gas throughout the motor cavity. The excessive temperature discharge gas heats the motor stator and windings which will in turn cause the motor protector to trip and de-energize the motor. A secondary flow passage increases the flow rate or the discharge gas to lower the cycle time of the compressor.
219 Citations
18 Claims
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1. A scroll compressor comprising:
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a hermetic shell; a first scroll member disposed in said shell and having a first spiral wrap on one face thereof; a second scroll member disposed in said shell and having a second spiral wrap on one face thereof, said wraps being intermeshed with one another; 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 to a discharge zone; a passageway having a first inlet in fluid communication with said discharge zone and an outlet in fluid communication with said suction zone; and normally closed valve member movable between a closed position where fluid flow through said passageway is prohibited and an open position where fluid flow through said passageway is permitted, said valve member moving from said closed position to said open position in response to a sensed temperature in excess of a predetermined value, said valve member being disposed between said first inlet and said outlet only when said valve member is in said closed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification