Patent application number | Description | Published |
20100224623 | MICROWAVE HEATING APPARATUS - To provide a microwave heating apparatus capable of heating various objects to be heated having different configurations, kinds, sizes, and amounts contained in a heating chamber with high efficiency by keeping low a reflected power of a microwave radiated from microwave supplying means, a microwave generator part includes oscillator parts ( | 09-09-2010 |
20110108548 | MICROWAVE HEATING APPARATUS - A microwave heating apparatus includes a microwave generation part | 05-12-2011 |
20110168699 | MICROWAVE HEATING APPARATUS - In a microwave heating apparatus of the invention, microwaves from oscillation parts | 07-14-2011 |
20120067873 | MICROWAVE HEATING DEVICE AND MICROWAVE HEATING METHOD - In order to provide a microwave heating device and a microwave heating method, which can surely prevent a microwave generating part from being destroyed by reflected power and which can heat a heating-target portion in a heating chamber with high efficiency, the present invention is configured such that, prior to a control part ( | 03-22-2012 |
20120111856 | MICROWAVE HEATING DEVICE AND MICROWAVE HEATING CONTROL METHOD - In order to provide a microwave heating device and a microwave heating control method which are capable of uniformly heating a to-be-heated object in a desired state, by employing plural feeding portions provided in a heating chamber on the basis of information about reflected electric power from the respective feeding portions; a control portion controls to supply microwave electric power from plural feeding portions to a heating chamber by operating a microwave generating portion at a heating frequency for heating a to-be-heated object, estimates a heating state for the to-be-heated object on the basis of per-unit-time increase/decrease change states of detected levels of detection signals detected by electric-power detection portions, and controls the heating frequency and the microwave electric power supplied from the feeding portions to the heating chamber. | 05-10-2012 |
20120152939 | MICROWAVE HEATING DEVICE - A microwave heating device according to the present invention includes a microwave oscillation portion including a reference-signal oscillator formed from a quarts oscillator, phase variable portions and phase-locked loops and, further, includes a control portion for controlling the microwave oscillation portion, and plural radiation portions placed on a wall surface of a heating chamber for housing a to-be-heated object, wherein microwaves supplied to plural microwave feeding points provided in the radiation portions are controlled in phase and electric power, thereby controlling the aspect of radiations of microwaves radiated from the radiation portions. | 06-21-2012 |
20120152940 | MICROWAVE HEATING DEVICE - In a microwave heating device, a control portion performs an operation for alternately repeating a sweeping operation for detecting reflected electric power with an electric-power detection portion while changing an oscillation frequency of an oscillation portion and fixing a phase value of a phase variable portion for detecting a reflected-electric-power characteristic with respect to the oscillation portion, and a sweeping operation for detecting reflected electric power with the electric-power detection portion while changing the phase value of the phase variable portion and fixing the oscillation frequency of the oscillation portion for detecting a reflected-electric-power characteristic with respect to the phase value, in order to determine an oscillation frequency and a phase value for use in heating a to-be-heated object. | 06-21-2012 |
20120160844 | MICROWAVE HEATING DEVICE - In order to provide a microwave heating device which includes radiation portions having a function of radiating microwaves forming both linearly polarized waves and circularly polarized waves and, further, having an electric-power synthesizing function, thereby offering new radiation functions. A heating chamber for housing a to-be-heated object therein is provided with plural radiation portions on a bottom wall surface thereof, and each of the radiation portions is provided with plural microwave feeding points, such that phase control and driving control are performed for each microwave feeding point. | 06-28-2012 |
20130008896 | MICROWAVE HEATING APPARATUS - A microwave heating apparatus includes, within a heating room, a placement table having a horizontal placement surface for placing an object to be heated, and a plurality of feeding portions which are placed on a wall surface of the heating room for supplying microwave electric power to the heating room. The microwave heating apparatus is adapted to relatively move the position of the straight line connecting two feeding portions to each other, with respect to the object to be heated, through a movement mechanism portion, and to detect a phase difference between the microwave electric powers which minimizes reflected electric power returning from the heating room to the two feeding portions, for detecting the state of placement of the object to be heated on the placement table. | 01-10-2013 |