초록 ▼

Temperature self-regulating food delivery systems are provided having a magnetic induction heater (32, 126) and an associated food container (76, 124) equipped with an essentially permanent ferromagnetic heating element (82, 100, 128). The heater (32, 126) and heating elements (82,100, 128) are desi

Temperature self-regulating food delivery systems are provided having a magnetic induction heater (32, 126) and an associated food container (76, 124) equipped with an essentially permanent ferromagnetic heating element (82, 100, 128). The heater (32, 126) and heating elements (82,100, 128) are designed so as to heat the element (82, 100, 128) to a user-selected regulation temperature when the elements (82, 100, 128) are coupled with the heater's magnetic field, and to maintain the temperature in the vicinity of the regulation temperature indefinitely temperature regulation is a heating achieved by periodically determining at least two parameters of the heaters resonant circuits related to the amplitude of the resonant current passing therethrough during heating and responsively altering the field strength of the magnetic field. Preferably, the value of the resonant circuit amplitude and the rate of change of the amplitude are determined.

대표청구항 ▼

[ What is claimed is:] [1.]1. Apparatus comprising:a magnetic induction heater including a magnetic field generator for generating a magnetic field, said heater having an RFID reader associated therewith;an object to be magnetically heated including an induction heatable element and an RFID tag, and

[ What is claimed is:] [1.]1. Apparatus comprising:a magnetic induction heater including a magnetic field generator for generating a magnetic field, said heater having an RFID reader associated therewith;an object to be magnetically heated including an induction heatable element and an RFID tag, andsaid heater having a microprocessor operably connected with said RFID reader for initiating the heating of said object only upon placement of said object proximal to said heater and in a position for RF communication between said tag and said reader, and for controlling the operation of said heater in response to information received from said tag.