초록 ▼

An improved refrigeration system that has an air cooled condenser exposed to outdoor ambient conditions and which automatically maintains sufficient head pressure during cooler weather for adequate liquid flow to the expansion valve of the evaporator by backflooding the condenser. Sub-cooling of the

An improved refrigeration system that has an air cooled condenser exposed to outdoor ambient conditions and which automatically maintains sufficient head pressure during cooler weather for adequate liquid flow to the expansion valve of the evaporator by backflooding the condenser. Sub-cooling of the liquid in the condenser results from the backflooding and this sub-cooled liquid flows into the liquid line to the expansion valve. The liquid line out of the receiver joins the liquid line below the receiver so that the pressure in the receiver can be used to maintain the liquid level and the presence of liquid at the condenser. Means is provided to control the refrigerant pressure in the receiver in response to liquid level in the outlet line from the condenser.

대표청구항 ▼

A refrigeration system having a closed refrigerant loop comprising: a compressor; a condenser; a surge receiver; expansion device; an evaporator; a discharge line connecting the compressor to the inlet of the condenser; a receiver pressure control line connecting between the discharge line and the t

A refrigeration system having a closed refrigerant loop comprising: a compressor; a condenser; a surge receiver; expansion device; an evaporator; a discharge line connecting the compressor to the inlet of the condenser; a receiver pressure control line connecting between the discharge line and the top of the receiver having pressure regulating means therein to establish a minimum receiver pressure in cold weather; a condenser drain line connecting the outlet of the condenser to a three way connection with the bottom of the surge receiver and with a liquid line to the expansion device; and, a flow through reservoir means in said condenser drain line having a liquid level detection means therein to determine the liquid level in said flow through reservoir; pressurization means in said receiver pressure control line opening to increase the pressure in said receiver whenever the liquid level in the flow through reservoir falls below a set limit.