Discharge gas temperature control

Details Discharge gas temperature control Discharge gas temperature control

1977-11-14

1983-01-25

Smith, Leonard E.

Pumps

Condition responsive control of pump drive motor

Responsive to pump or pump fluid temperature

417312, 417902, 62228, F04B 4902

Patent

active

043700993

ABSTRACT:
A discharge gas temperature sensing corrective arrangement for a hermetic motor-compressor unit is disclosed wherein a heat sensitive element is supported in a discharge muffler located remote from the compressor outlet and in good heat transfer relation with compressed gas entering the discharge muffler from the compressor outlet so that the heat sensitive element provides an indication of the temperature of that compressed gas as it enters the discharge muffler. The discharge muffler outlet is connected to a somewhat conventional refrigerating circuit and a conduit connects the discharge muffler inlet to the compressor outlet. The compressor may include a plurality of gas compressing cylinders having their respective discharge ports connected together to form a discharge gas manifold which functions as a muffler within the compressor with the conduit connected to that discharge gas manifold. The hermetic unit may include first and second casing portions which are joinable, for example, by welding about an annular region with the sensor coupling circuitry disposed entirely on one side of the plane of the annular region and sufficiently distant from that region to prevent heat damage to the circuitry during the welding operation. The conduit connecting the compressor outlet to the discharge muffler typically passes through the plane of this annular region.

REFERENCES:
patent: 3232519 (1966-02-01), Long
patent: 3233822 (1966-02-01), Comstock et al.
patent: 3278111 (1966-10-01), Parker
patent: 3531222 (1970-09-01), Randall et al.

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