Patent ID: 6467282
Filing Date: 2002-10-22
Classification: F25B,F25D,G01N

Abstract:
A frost sensor for mounting on an evaporative heat exchanger that is exposed to an airflow, said frost sensor comprising:a printed circuit board comprising an electrical circuit; a first temperature sensor that is mounted on said printed circuit board and that is electrically connected to said electrical circuit; a copper clip; a heat flux sensor that is mounted on said copper clip and that is electrically connected to said electrical circuit; a spring clip that is operative to hold said heat flux sensor or said copper clip and said first temperature sensor against a first cooling fin of said evaporative heat exchanger and to hold a part of said printed circuit board against said first cooling fin on the side of said cooling fin opposite the side against which said heat flux sensor or said copper clip is being held; a second temperature sensor that is mounted on said printed circuit board in such a manner that the airflow impinges on the second temperature sensor before it impinges on said first cooling fin; and an electrical connector that is mounted on said printed circuit board and electrically connected to said electrical circuit.