Encapsulated hermetic refrigerating unit - has compressor in casing under negative pressure with high liq. level control preventing motor starting

The refrigerating unit has a compressor fitted in a casing kept under negative pressure. The unit is fitted with a device preventing the compressor from starting as long as the casing is filled with liquid refrigerant. The casing (1) contains the compressor (3) driven by asynchronous motor. The comp...

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Bibliographic Details
Main Authors PEDER PEDERSEN,SVEND, RASMUSSEN,BOERGE
Format Patent
LanguageEnglish
German
Published 09.03.1978
Edition2
Subjects
BLASTING
COMBINED HEATING AND REFRIGERATION SYSTEMS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
HEAT PUMP SYSTEMS
HEATING
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
REFRIGERATION MACHINES, PLANTS OR SYSTEMS
REFRIGERATION OR COOLING
WEAPONS
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Summary:The refrigerating unit has a compressor fitted in a casing kept under negative pressure. The unit is fitted with a device preventing the compressor from starting as long as the casing is filled with liquid refrigerant. The casing (1) contains the compressor (3) driven by asynchronous motor. The compressor sucks refrigerant gas from the casing space (4) and delivers via discharge pipe (5) to the condenser. The refrigerant gas returns to the casing via connection (7). The motor (M) has a starting winding (9) and a running winding (8). In the starting line of the motor is a blocking device (15) fitted consisting of a bi-metal switch which is designed to close only when the temp. within the casing exceeds 50 deg.C, i.e. when the liquid refrigerant accumulated previously has evaporated.
Bibliography:Application Number: DE19762639019