| 摘要 |
<p>PCT No. PCT/DK94/00217 Sec. 371 Date Dec. 21, 1995 Sec. 102(e) Date Dec. 21, 1995 PCT Filed Jun. 6, 1994 PCT Pub. No. WO94/29779 PCT Pub. Date Dec. 22, 1994The invention is an apparatus for controlling an electrical heating element to control a cooking temperature of a cooking pot and contents therein. The invention includes a source of electrical current; a control for controlling application of electrical heating current from the source of the electrical current to the heating element to control the cooking temperature of the cooking pot and the contents which are thermally coupled to the heating element; a source of DC electrical current; a coil from producing a DC magnetic field, in response to DC electrical current applied thereto from the source of DC electrical current, which is magnetically coupled to the cooking pot and the contents therein; a switch, coupled between the source of DC electrical current and the coil, for controlling the application of DC electrical current to the coil to cause the buildup of the DC magnetic field and thereafter the decay of the DC magnetic field therein; a field sensor, magnetically coupled to the pot and the contents, for producing a control voltage which is a function of the temperature of the pot and the contents therein and which is in response to the decay of the DC magnetic field; and wherein the control is responsive to the control voltage and controls the application of the electrical heating current to the heating element as a function of a set cooking temperature inputted from a temperature control and the control voltage to cause the temperature of cooking to track the set temperature.</p> |
