Refrigerant quantity detecting device for air conditioning of ve

Details Refrigerant quantity detecting device for air conditioning of ve Refrigerant quantity detecting device for air conditioning of ve

1979-03-20

1982-01-05

Wayner, William E.

Refrigeration

With indicator or tester

Condition sensing

200 84R, 340623, G01K 1300, H01H 3518

Patent

active

043087256

ABSTRACT:
A device for detecting the quantity of a refrigerant circulating in an air conditioner for vehicles, provided with a sensing means which comprises a body having a hollow portion of a construction open to the outside thereof, projecting into the interior of the refrigerant receiver of the air conditioner. The sensing means also includes a floating element disposed within the hollow portion so as to float on the surface of the refrigerant therein. Thus, the sensing means has excellent resistance to shocks and vibrations, and can also be mounted in the refrigerant receiver even after the latter has been assembled. Also provided is an alarm means electrically connected with the sensing means to be actuated in response to the motions of the floating element, which may comprise a comparator means coupled to a time constant circuit, thus providing a stable alarm operation.

REFERENCES:
patent: Re19700 (1935-09-01), Williams
patent: 1323113 (1919-11-01), Sprangers
patent: 2120825 (1938-06-01), Wolfert
patent: 2253260 (1941-08-01), Alcorn
patent: 2661411 (1953-12-01), Berger
patent: 2855582 (1958-10-01), Tweedale
patent: 2863140 (1958-12-01), Eshbargh
patent: 2874243 (1959-02-01), Metzler
patent: 3962696 (1976-06-01), Smith et al.
patent: 4167858 (1979-09-01), Kojma et al.

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