Hermetic or semi-hermetic refrigeration motor-compressor unit

Details Hermetic or semi-hermetic refrigeration motor-compressor unit Hermetic or semi-hermetic refrigeration motor-compressor unit

1988-07-11

1990-01-02

Capossela, Ronald C.

Refrigeration

Automatic control

Refrigeration producer

62505, F25B 4100

Patent

active

048904619

ABSTRACT:
Liquid from the condenser 34 l is supplied to the innerspace of the motor through pipe 11 and flashes therein while cooling the motor. The resulting gas is sent through pipe 10 to an economizer hole 9 of the compressor. At full load, hole 9 is at a higher pressure than the intake of the compressor. At part load, hole 9 is at a pressure close to the intake pressure. A piston 12 is subjected on one face to the economizer hole pressure and on the other face to the intake pressure. When both pressures tend to be equal, piston 12 travels to shoulder 16 and establishes therewith a pressure drop elevating the pressure in motor housing 7, thereby to maintain in motor housing 7 a pressure able to urge liquid from the motor casing to the evaporator 37 through pipe 38.

REFERENCES:
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patent: 3192735 (1965-07-01), Bernhard
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patent: 3618337 (1971-11-01), Mount
patent: 3698839 (1972-10-01), Distefano
patent: 3805547 (1974-04-01), Eber
patent: 3838581 (1974-10-01), Endress
patent: 3866438 (1975-02-01), Endress
patent: 3885402 (1975-05-01), Moody, Jr. et al.
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patent: 3913346 (1975-10-01), Moody, Jr. et al.
patent: 3945219 (1976-03-01), Kasahara
patent: 4261691 (1981-04-01), Zimmern et al.
patent: 4509341 (1985-04-01), Zimmern
patent: 4553399 (1985-11-01), Noda et al.
patent: 4573324 (1986-03-01), Tischer et al.

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