Title:
DEVICE FOR DETECTING THAWING STATE
Document Type and Number:
Japanese Patent JPS58141767
Kind Code:
A
Abstract:
PURPOSE: To obtain a key for proper thawing, by measuring the change of properties of a food in thawing by high frequency.
CONSTITUTION: The frozen food 3 is put in the heating chamber 1, and a high- frequency signal having a frequency different from 2.45GHz generated from the oscillator 16 for high-frequency signal is radiated from the transmitting antenna 17 to the heating chamber 1. For example, the change 21 in the output voltage of the thawing of a frozen food at about -18W-15°C is gradually lowered by heating, and the absorption of electrical radiation is enlarged. The food temperature tmin to make the change in voltage minimum is approximately -3W-1°C, and the thawing is detected by finding this point.
Inventors:
ISHIHARA MASAHIRO
WATANABE MITSURU
OOKAWA SHIYUUJI
TAGUCHI SHIYUNICHI
KIKUCHI ITSUO
WATANABE MITSURU
OOKAWA SHIYUUJI
TAGUCHI SHIYUNICHI
KIKUCHI ITSUO
Application Number:
JP2560382A
Publication Date:
August 23, 1983
Filing Date:
February 19, 1982
Export Citation:
Assignee:
HITACHI NETSU KIGU KK
International Classes:
A23L3/365; A23L3/36; G01N22/02; (IPC1-7): A23L3/36