Refrigerant and H.V.A.C. ducting leak detector

Details Refrigerant and H.V.A.C. ducting leak detector Refrigerant and H.V.A.C. ducting leak detector

1992-12-28

1994-08-16

Tanner, Harry B.

Refrigeration

With indicator or tester

Diverse function indicators or testers

62129, 340607, G08B 1900

Patent

active

053375769

ABSTRACT:
An apparatus for detecting a loss of refrigerant and air pressure in a refrigeration/heat pump system having a low pressure refrigerant line and H.V.A.C. ducting, the apparatus comprising: a pressure switch fluidly communicating with the low pressure refrigerant line, responsive to pressure changes therein; a vacuum pressure switch fluidly communicating with a portion of the H.V.A.C. ducting, responsive to air pressure loss therein; a signaling circuit having an enabling DC power supply, operatively associated with the pressure switch and vacuum pressure switch, and two pairs of green and red LEDS for conveying to the operator when the refrigerant pressure drops below a predetermined valve indicating a refrigerant loss or clogged, dirty condenser or evaporator coils, and when air pressure within the H.V.A.C. ducting falls below a predetermined value, indicating a dirty air filter in need of replacement, and a housing for the signaling circuit and respective LED assembly, the signaling circuit including a normally open reed switch which may be selectively enabled by the operator by placing a magnet on the external periphery of the housing.

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