Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Patent
1987-12-14
1989-04-11
Smith, Leonard E.
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
417292, 417317, 417505, F04B 3908
Patent
active
048201308
ABSTRACT:
Inside the hermetic shell of a scroll compressor, a normally closed solenoid valve seats against the back side of a stationary scroll plate to close a discharge opening through the plate. A coil circuit that actuates the valve has an electrical resistance that increases with temperature. The temperature dependent resistance allows the coil circuit to also function as a discharge temperature sensor. Should the discharge gas over-heat, the compressor motor and the valve are de-energized in response to the resistance exceeding a predetermined limit. The closed valve prevents backflow from rapidly reversing the rotational direction of the compressor, which can be extremely noisy and damaging to the compressor. Both the valve and the compressor motor are energized at the same time, regardless of the compressor's direction of rotation. Should the compressor motor be inadvertently wired to operate in reverse, the solenoid valve still opens to prevent destructively low pressure from developing between the scroll plates.
REFERENCES:
patent: 4332535 (1982-06-01), Terauchi et al.
patent: 4395203 (1983-07-01), Takada
patent: 4432698 (1984-02-01), Shirakuma et al.
patent: 4460321 (1984-07-01), Terauchi
patent: 4505651 (1985-03-01), Terauchi et al.
patent: 4642034 (1987-02-01), Terauchi
patent: 4655696 (1987-04-01), Utter
patent: 4666381 (1987-05-01), Butterworth
Eber David H.
Kotlarek Peter A.
Okoren Ronald W.
American Standard Inc.
Beres William J.
Harter Robert J.
Polsley David L.
Smith Leonard E.
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