System for preventing hunting of expansion valve within refrigeration cycle
AssigneeFujikoki Corporation
InventorsMasamichi Yano, Masakatsu Minowa
Life of this patent
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Abstract
A system and method for preventing hunting of a thermal expansion valve used to control the flow of refrigerant supplied to an evaporator in a refrigeration cycle. A refrigeration apparatus is provided with a compressor, a condenser, a receiver, an expansion valve, and an evaporator connected in this order, spherically activated carbon made of phenol having pore sizes fit for molecular sizes of a working fluid is prepared; and the spherically activated carbon is provided into the expansion valve; whereby hunting, or the repeated opening and closing of the expansion valve, is prevented.
Claims2
A refrigeration system, comprising:
- an expansion valve, said valve having a temperature sensor, said temperature sensor comprising a working fluid sealed inside said temperature sensor;
- and
- an adsorbent in said temperature sensor, said adsorbent includes a spherically activated carbon made of phenol having pore sizes fit for molecular sizes of said working fluid;
- wherein said adsorbent stabilizes temperature and pressure characteristics of the expansion valve.
A refrigeration system, comprising:
- an expansion valve, said valve having a temperature sensor, said temperature sensor comprising a working fluid sealed inside said temperature sensor;
- and
- an adsorbent in said temperature sensor, said adsorbent includes a spherically activated carbon made of phenol having pore sizes with radiuses of 1.7 to 5.0 times the size of said working fluid's molecular size;
- wherein said adsorbent stabilizes temperature and pressure characteristics of the expansion valve.
Dependencies are inferred from the claim text.