Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Patent
1989-02-01
1990-11-06
Vrablik, John J.
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
418 88, 418 85, F04C 2904
Patent
active
049682237
ABSTRACT:
Patent of Invention for "GAS AND OIL COOLING SYSTEM IN A HERMETIC COMPRESSOR" for small refrigeration machines of the type including an assembly wherein is defined a cylinder housing a piston driven from a crankshaft coupled to an electric motor and forming suction and compression chambers inside the cylinder, these elements being assembled inside a sealed shell acting as a lubricant oil sump and incorporating independent lubricant oil outlet and return tubes connected to a heat exchanger external to the shell. The system in question includes oil pumping means (20) assembled on the shaft (5) having its suction (24a) connected to the lubricant oil contained in the bottom of shell (1) and its discharge (24b) connected to the oil outlet tube (9a), the discharge (24b) of the oil pumping means (20) being maintained in fluid communication with the cylinder compression chamber (2) through a compressed refrigerant gas conduit (26a). Thus, the oil is drawn from the bottom of shell and pumped jointly with the refrigerant gas arriving to the pump discharge, through the heat exchanger (10) and returned to the inside of the shell (1).
REFERENCES:
patent: 4518330 (1985-05-01), Asami et al.
patent: 4645429 (1987-02-01), Asami et al.
patent: 4781542 (1988-11-01), Ozu et al.
Cavanaugh David L.
Empresa Brasiliera de Compressores
Vrablik John J.
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