Method and apparatus for detecting an amount of cooling medium c

Details Method and apparatus for detecting an amount of cooling medium c Method and apparatus for detecting an amount of cooling medium c

1993-10-08

1994-11-01

Tanner, Harry B.

Refrigeration

With indicator or tester

Condition sensing

62125, 62511, 116276, F25B 4902

Patent

active

053598628

ABSTRACT:
A cooling medium charge amount detector capable of detecting whether or not an actual amount of a cooling medium is a desired amount in comparison with the amount of the cooling medium necessary for a desired degree of supercooling on an inlet side of an expansion valve in a refrigeration circulation system, without using a sensor or computation means. A cooling medium on the inlet side of an expansion valve 23 in a refrigeration circulation system 20 is allowed to flow into a cooling medium charge amount detector 40. Throttles 41, 42, 43 are disposed in this cooling medium charge amount detector 40, and sight glasses 44, 45, 46 are disposed at both ends of the throttles 41, 42, 43 to detect a gas-liquid condition of the cooling medium. When the cooling medium flows into this cooling medium charge amount detector, the shift of the cooling medium from a liquid condition to a two-phase gas-liquid condition is checked upstream or downstream of any throttle to match the load condition at that time. In this way, a pressure difference proportional to the degree of supercooling can be detected and eventually, whether or not the charge amount of the cooling medium is suitable in the refrigeration circulation system 20 can be detected.

REFERENCES:
patent: 3525231 (1970-08-01), Armstrong
patent: 3752185 (1973-08-01), Mullins
patent: 3753356 (1973-08-01), Kramer
patent: 4064826 (1977-12-01), Pauli
patent: 4644755 (1987-02-01), Esslinger et al.
patent: 4649711 (1987-03-01), Sibley et al.

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