Abstract: A drawer type heating apparatus includes a heating case forming a heating space, and an openable door adapted to be moved in a drawing manner relative to the heating case for opening and closing an opening portion, and includes a radio-wave transmission suppression portion which is faced to inner wall surfaces of the opening portion of the heating case, and placed such that there is a predetermined gap between the radio-wave transmission suppression portion and the entire periphery of the inner wall surfaces of the opening portion in the heating case, in a state where the openable door is closed, the radio-wave transmission suppression portion including a first radio-wave-propagation-direction suppression-area constituted by a surface with a plurality of steps, and a second radio-wave-propagation-direction suppression-area having suppression protruding portions which are periodically formed and placed in such a way as to face the first radio-wave-propagation-direction suppression-area with a predetermined int

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: It is an object to provide an electromagnetic-wave shield structure with a reduced size for an electromagnetic wave heating device, with a simple structure employing a meta-material formed from a lamination members including a dielectric member and conductive members laminated on each other such that the meta-material is placed in a choke slot. There are provided a heating chamber for housing a to-be-heated object, an electromagnetic-wave supply device, and a door. A choke slot and lamination members are provided in at least one of an opening peripheral portion and a door peripheral portion which is faced thereto in a state where the door is closed. This enables provision of an electromagnetic-wave shield structure with a smaller size.

Abstract: 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.

Abstract: 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 (1), which receives a reflected power signal and a supply power signal from a power detecting part (4), starting a heating operation to an object (15) to be heated in a heating chamber (7), the control part (1) executes a frequency sweep operation of a prescribed frequency band with frequency sweep power lower than rated supply power supplied to a power feeding part (5) during the heating operation, to thereby set an oscillation frequency at which the minimum reflected power becomes minimum, and to control an oscillation frequency of an oscillator part (2) and an output of a power amplifier part (3).

Abstract: In a microwave heating apparatus of the invention, microwaves from oscillation parts 1a, 1b are divided into a plurality of microwaves by power division parts 2a, 2b and inputted to amplification parts 4a, 4b, 4c, 4d, and desired microwave powers from the amplification parts are supplied from feeding parts 5a, 5b, 5c, 5d to a heating chamber 8. Reflected powers reflected from the heating chamber to the amplification parts via the feeding parts are detected by power detection parts 6a, 6b, 6c, 6d. Each of the feeding parts has a plurality of antennas for supplying the microwaves having different characteristics to the heating chamber, and a control part 7 extracts an oscillating frequency with which the reflected powers detected by the power detection parts are minimum, and causes the oscillation parts to oscillate at the extracted oscillating frequency so as to supply the microwaves having the different characteristics from the plurality of antennas to the heating chamber.

Abstract: To provide a high-frequency cooking apparatus of which installation performance, handling performance, and quality can be enhanced. A high-frequency cooking apparatus 10 for heat-processing an object to be heated, by supplying high frequency and steam into a heating chamber, is provided with a water tank 13 which stores water for generating the steam. The water tank 13 is detachably assembled toward the front to a lower part of a body 11 of the high-frequency cooking apparatus which has the heating chamber, and a tray 12 is integrally assembled to the water tank 13.

Abstract: A microwave heating apparatus includes a microwave generation part 10 using a semiconductor element, and first and second heating chambers 100a, 100b to each of which a microwave generated in the microwave generation part is fed. A reflected microwave returned from at least one of the first and second heating chambers 100a, 100b to the microwave generation part is transmitted to the other heating chamber by a circulation type non-reciprocal circuit 118, so that generated power of the microwave generation part is substantially completely consumed upon heating of an article to be heated.

Abstract: In a microwave heating apparatus, an electricity feeding port constituting a port of radiating a microwave is set to a ceiling wall of a heating chamber, a magnetron is arranged on a side of an outer side face of the heating chamber by directing an antenna for oscillating the microwave to a side of the heating chamber, and a wave guide for guiding the microwave oscillated from the magnetron to the electricity feeding port is formed in an L-like shape including a side wave guide extended upwardly from a surrounding of the antenna along the outer side face of the heating chamber and an upper wave guide extended from an upper end of the side wave guide to the electricity feeding port along an outer face of the ceiling wall.

Abstract: 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 (2a, 2b), power divider parts (3a, 3b), power amplifier parts (5a-5d), a heating chamber (10) containing the object to be heated, and a plurality of feeding parts (8a-8d, 9a-9d) arranged in a wall surface of the heating chamber to supply the microwaves therein, in which a phase difference and oscillation frequencies outputted from the feeding parts controlled as a pair are variably controlled.

Abstract: A microwave heating apparatus includes a microwave generation part (5) having a plurality of output parts, a heating chamber (4) to contain an object to be heated, a plurality of feeding parts (21a, 21b, 21c, 21d) supplying outputs of the plurality of output parts to the heating chamber, and a control part (6) controlling microwave radiation from the plurality of feeding parts to control an electromagnetic wave distribution in the heating chamber, in which a microwave is concentrated on the object to be heated put in the heating chamber.

Abstract: A microwave oven includes a microwave generation device and a case. Three antennas are provided in the case. The two antennas are opposite each other along a horizontal direction. In the microwave generation device, a power distributor almost equally distributes a microwave generated by a microwave generator among phase variators. Each of the phase variators adjusts the phase of the fed microwave. This causes a phase difference between microwaves respectively radiated from the opposite two antennas to change. The microwaves are respectively radiated from the antennas.

Abstract: A problem of the invention is to provide a high frequency heating apparatus capable of realizing excellent heating without an irregularity in heating even for a thick-walled heated object. In order to resolve the above-described problem, according to a high frequency heating apparatus of the invention, a high frequency heating apparatus 1 for heating a heated object by irradiating a microwave having a frequency of 5.8 GHz to the heated object is constituted by mounting a plurality of pieces of wave guides 11a, 11b having feeding ports 7, 9 for emitting microwaves into a cavity 3 partitioning a heating chamber 2.

Abstract: To provide a high-frequency cooking apparatus of which installation performance, handling performance, and quality can be enhanced. A high-frequency cooking apparatus 10 for heat-processing an object to be heated, by supplying high frequency and steam into a heating chamber, is provided with a water tank 13 which stores water for generating the steam. The water tank 13 is detachably assembled toward the front to a lower part of a body 11 of the high-frequency cooking apparatus which has the heating chamber, and a tray 12 is integrally assembled to the water tank 13.

Abstract: A heating cooker (100) for heating to process an object placed on a mounting base of a heating chamber (51) including at least a single piece of a rod-like heater arranged along a face member forming the heating chamber (51) and a heat shielding member provided along a longitudinal direction of the rod-like heater between the rod-like heater and the face member (53a) on an outer side of the heating chamber (51).

Abstract: The problem to be solved by the invention is to restrain local heating peculiar to microwave heating to thereby realize the uniform heating of an object to be heated and thus enhance the condition of the object to be heated after heated. In a microwave heating method for supplying microwaves into a heating chamber 11 storing therein an object to be heated to heat the object to be heated, microwaves are supplied into the heating chamber 11 to heat the object to be heated; the temperature of the object to be heated is measured to check whether a given temperature difference has been generated in the temperature distribution of the object to be heated; and, when the given temperature difference has been generated, the minute particles of water are supplied into the heating chamber 11 to change the permittivity distribution state within the heating chamber 11, thereby changing the distribution of electric fields caused by the microwaves supplied into the heating chamber 11.

Abstract: A problem of the invention is to provide a high frequency heating apparatus capable of realizing excellent heating without an irregularity in heating even for a thick-walled heated object. In order to resolve the above-described problem, according to a high frequency heating apparatus of the invention, a high frequency heating apparatus 1 for heating a heated object by irradiating a microwave having a frequency of 5.8 GHz to the heated object is constituted by mounting a plurality of pieces of wave guides 11a, 11b having feeding ports 7, 9 for emitting microwaves into a cavity 3 partitioning a heating chamber 2.