Refrigerant level sensor in receiver tank

Details Refrigerant level sensor in receiver tank Refrigerant level sensor in receiver tank

1984-06-20

1987-05-26

Wan, Gene

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356436, G01N 2149

Patent

active

046688706

ABSTRACT:
A device for sensing the refrigerant level in a receiver tank and thereby detecting the surplus or shortage of the refrigerant in the tank is provided. The sensor device has a photoconductor a part of which is placed in the receiver tank. A light source is disposed at one end of the photoconductor and a light receptor element is disposed at the other end. The quantity of light passed from the light source to the receptor element through the photoconductor is changed as the photoconductor is dipped in the refrigerant in the tank. The surplus or shortage of the refrigerant in the tank is detected from the change in quantity of light received by the receptor element.

REFERENCES:
patent: 4045668 (1977-08-01), Pitt et al.
patent: 4410020 (1983-10-01), Lorenz
patent: 4468567 (1984-08-01), Sasano et al.

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