Patent Number: 7,765,814

Title: Sensor assembly for detecting ice crystal formation on heat exchange surface and ice-making machine incorporating the same

Abstract: A sensor assembly for detecting ice crystal formation on a heat exchange surface in an ice-making machine comprises at least one microphone monitoring the sound made by a rotating blade assembly within the ice-making machine during ice slurry formation. A filter filters the output of the microphone to remove background noise. A comparator receives the output of the filter and compares the filtered microphone output with a threshold to determine if the filtered microphone output signifies ice crystal formation on the heat exchange surface. The operation of the ice-making machine can then be adjusted in a manner to allow the formed ice crystals to be removed from the heat exchange surface.

Inventors: Goldstein; Vladimir (Woodbridge, CA)

Assignee: Sunwell Engineering Company Limited

International Classification: F25C 1/00 (20060101); F25D 21/06 (20060101); F25D 21/00 (20060101); F25D 21/10 (20060101)

Expiration Date: 8/03/12018