Compressor refrigeration plant

Details Compressor refrigeration plant Compressor refrigeration plant

1976-11-24

1978-04-11

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62223, 62511, F25B 4106

Patent

active

040831965

ABSTRACT:
The invention relates to a temperature control system for refrigeration unit. In this system a capillary tube extends between the condenser and the evaporator and a chamber upstream from at least a section of the capillary tube contains a PTC resistor. The PTC resistor is supplied with current in response to a thermostatic sensing of a predetermined low temperature in the room or compartment which contains the evaporator. In response thereto the PTC resistor generates enough heat to produce a vapor plug which throttles of stops the flow of refrigerant in the capillary section but not enough heat to cause coking of the refrigerant oil which would permanently plug the capillary tube. The downstream capillary section is so dimensioned that it is permeable to liquid refrigerant but is substantially impermeable to the refrigerant vapor generated in the chamber.

REFERENCES:
patent: 2685780 (1954-08-01), Zearfoss, Jr.
patent: 3564199 (1971-02-01), Blaha
patent: 3638447 (1972-02-01), Abe
patent: 3940591 (1976-02-01), Ting

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