Refrigeration – With indicator or tester – Condition sensing
Patent
1993-02-09
1994-03-29
Wayner, William E.
Refrigeration
With indicator or tester
Condition sensing
73295, 137392, G01K 1300
Patent
active
052973930
ABSTRACT:
An apparatus is provided for use in monitoring the level and temperature of a refrigerant, wherein the temperature of the liquid phase of the refrigerant is to be maintained below an established acceptable value. The apparatus includes a chamber interposed in a liquid line of a cooling system, wherein the chamber has a transverse cross-sectional area greater than the area of the liquid line, and is disposed at least partially above the line. A temperature sensor and a heater are provided within the chamber above the height of the liquid line and the sensor is connected to an alarm through a control which measures the temperature of the sensor and activates the alarm when the sensor temperature exceeds a predetermined value above the established acceptable value of the refrigerant liquid. The heater is of a temperature greater than the predetermined value so that when the liquid within the chamber falls below the temperature sensor and heater, heat is transferred to the sensor and raises the temperature of the sensor, and when the liquid level within the chamber reaches the sensor and heater, heat is transferred to the liquid and the temperature of the sensor is maintained at about the same value as the liquid.
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