Method and apparatus for compressor protection in a refrigerant

Details Method and apparatus for compressor protection in a refrigerant Method and apparatus for compressor protection in a refrigerant

1991-06-17

1992-09-15

Rivell, John

Refrigeration

Automatic control

Withdrawing or adding refrigerant from or to normally closed...

62 77, 62292, F25B 4500

Patent

active

051467607

ABSTRACT:
A method and apparatus for recovering compressible refrigerant from a refrigeration system and delivering the recovered refrigerant to a refrigerant storage means. The recovery method includes the steps of withdrawing refrigerant from a refrigeration system being serviced and compressing the withdrawn refrigerant in a compressor to form a high pressure gaseous refrigerant. The high pressure gaseous refrigerant is delivered to a condenser where it is condensed to form liquid refrigerant. The liquid refrigerant from the condenser is delivered to the refrigerant storage means. Means are provided for stopping the withdrawal of refrigerant from the refrigeration system being serviced when a predetermined event occurs. When this occurs, the system begins to withdraw stored refrigerant from the storage means. The refrigerant withdrawn from the storage means is then compressed in the same compressor which was used to compress refrigerant withdrawn from the refrigeration system. This refrigerant is then condensed to form liquid refrigerant which is delivered directly back to the storage means to thereby pre-cool the storage means and the refrigerant contained therein. This pre-cooling cycle is performed for a predetermined time period. After the predetermined time period, the condensed refrigerant withdrawn from the storage means is caused to pass through an expansion means prior to delivering it back to the storage means to thereby cool the storage means.

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patent: 5022230 (1991-06-01), Todack
patent: 5050401 (1991-09-01), Van Steenburgh, Jr.

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