F - Mech Eng,Light,Heat,Weapons – 25 – C
Patent
F - Mech Eng,Light,Heat,Weapons
25
C
F25C 1/00 (2006.01) F25C 1/12 (2006.01) F25C 5/10 (2006.01)
Patent
CA 2355392
The present invention comprises an ice harvest system for use in an ice maker. The ice maker herein includes a refrigeration system for cooling of an evaporator. Ice is formed thereon as water is pumped by a re-circulating pump to flow from a water distribution tube over the evaporator surface. Water that is not immediately frozen thereon flows into a water pan positioned there below. A pressure fitting is positioned in the pan at the bottom thereof and connected to a pneumatic tube. The pneumatic tube is connected to a pressure sensor located on a control board at a position remote from the water pan. Pressure is communicated through the tube to the pressure sensor as a function of the depth of the water in the pan. This pressure is converted by a microprocessor of the control board for interpretation as a water level in the pan. As the water level in the tray lowers due to the formation of ice, the pressure transmitted to the pressure sensor reduces from a predetermined high or full water level. A harvest point occurs which corresponds to the sensing of a predetermined low water level/low pressure point indicating sufficient ice has formed on the evaporator.
Billman Gregory M.
Elsom Kyle B.
Wiley Donald E. Jr.
Imi Cornelius Inc.
Ridout & Maybee Llp
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