In fabricating a door switch for a microwave oven, two switches are incorporated in a single switch case to allow a reduction in the size and to allow common use of switch components, thereby achieving a cost reduction through a reduction in the number of components. Further, a contact switching structure tilted in conjunction with opening and closing of a door is provided to achieve high accuracy in switching the switches. There is provided a first switch whose contact portions are switched by elastically displacing a conductive contact piece in the switch case when a first tilting lever is tilted, a second switch whose contact portions are switched by elastically displacing another conductive contact piece in the switch case at timing that is slightly different from the timing for switching the contact portions of the first switch, and a third switch which is switched when a second tilting lever is tilted.

High-frequency heating device

A microwave heating device which comprises a heating chamber (3) to receive an article (2) being heated, a microwave generator (11) for irradiating microwaves in the heating chamber (3), and a steam generator (12) for supplying the heating chamber (3) with steam. Provided in the heating chamber (3) are heat accumulating plates (28a, 28b) adapted to be subjected to microwave irradiation for heating and heat accumulation. Accordingly, dewing resulting from steam is reduced in the heating chamber (3).

Microwave heating device

A high-frequency heating apparatus of the present invention includes a heating chamber to which a heating plate for loading a subject to be heated thereon is detachably attached, a microwave generating unit, a waveguide for transmitting a microwave from the microwave generating unit, a rotation antenna for radiating the microwave into the heating chamber from the waveguide, a driving unit for turning/driving the rotation antenna, an operating portion capable of choosing the grill menu by which the subject to be heated put on the heating plate is heated and a hot-up menu by which the subject to be heated is heated without the heating plate, and a controlling unit for controlling the driving unit based on an output signal form the operating portion, wherein the controlling unit controls to vary a direction of a sharp portion of a radiation directivity of the rotation antenna in response to the output signal from the operating portion.

Microwave heating apparatus

PROBLEM TO BE SOLVED: To provide a steam generator surely controlling steam generation even when the temperature of a water storing portion cannot be accurately detected because of the generation of scale in a steam container, and also to provide a heating cooker using the generator. SOLUTION: This steam generator comprises: the steam container 41; water supply portions 30, 32, 33, 34 for intermittently supplying water into the steam container 41; first and second steam generating heaters 42A, 42B for heating a base portion A of the steam container 41 and evaporating the water supplied to the water storing portion S; and a temperature sensor 43 for detecting a temperature of the base portion A of the steam container 41. In steam generating motion for intermittently supplying the water to the water storing portion S of the steam container 41 while heating the base portion A of the steam container 41 by the first and second steam generating heaters 42A, 42B, and for repeating the temperature up and down of the base portion A detected by the temperature sensor 43, a control device 80 supplies the water to the water storing portion S by operating a pump 33 when the temperature of the base portion A is increased to be higher than a prescribed temperature rise determination value from a minimum value. COPYRIGHT: (C)2008,JPO&INPIT

Steam generator and heating cooker

PROBLEM TO BE SOLVED: To provide a maintenance-easy microwave heating device capable of heating a heated body while controlling a heating position, and that has a reduced size and weight.SOLUTION: A microwave transmission part 11 that is a portion for generating a microwave signal with which a heated body is irradiated is configured by using a semiconductor active element, and a size and weight of the entire microwave heating device 1 is drastically reduced. While changing a microwave signal level from the microwave transmission part 11 on the basis of a monitoring result by a temperature sensor 16 and/or a microwave reception level sensor 17 provided in a cavity resonator 14, a movable reflection plate 15 having a simple structure is driven to change a state of a standing wave generated in the cavity resonator 14, and a heating state including a heating position of the heated body is controlled.

PROBLEM TO BE SOLVED: To provide a sufficient amount of superheated steam from right after starting cooking during high temperature cooking, and to provide a sufficient amount of superheated steam even during low temperature cooking. SOLUTION: When a high temperature cooking menu is selected, electric power is supplied to a heat storage material heating heater 24 to store heat in a heat storage material 7. When cooking is started, electric power supply to the heat storage material heating heater 24 is stopped, the heat storage material 7 is contacted to a steam generator 3, and electric power is supplied to a steam generating heater 25. In such way, by using heat stored in the heat storage material 7 as heat for saturated steam generation to generate a large amount of superheated steam from right after starting cooking, air in a heating chamber 1 is rapidly driven away. On the other hand, when a low temperature cooking menu is selected, heat storage in the heat storage material 7 is prevented, and a state of the heat storage material 7 separated away from the steam generator 3 is retained. By this, drawing of heat from the steam generating heater 25 by the heat storage material 7 is prevented, steam is generated quickly, and a sufficient amount of superheated steam is provided. COPYRIGHT: (C)2008,JPO&INPIT

Heating cooking device

PROBLEM TO BE SOLVED: To perform constantly optimum heating based on an analysis result by high-efficiently analyzing the numerical value of an electromagnetic field in a chamber containing a substance to be heated. SOLUTION: A substance to be heated contained in the chamber of a microwave oven is placed on a turntable 4. Further, a shape-recognizing sensor 9 to recognize the shape of the substance 1 to be heated is provided in the chamber. A microcomputer 13 calculates a heating sequence adaptable to heating cooking in a way that after an electromagnetic field model in a chamber is produced by using information containing shape information indicating the shape of the substance 1 to be cooked based on the recognition result of the sensor 9, physical property value information indicating a value of the physical characteristics of the substance 1 to be heated is allotted to the produced electromagnetic field model and numerical analysis is processed. In this case, since shape information is obtained by detecting it by the sensor 9 as the substance 1 to be heated is rotated by the table 4, the shape of the substance 1 to be heated is recognized by the reduced member of the sensors 9.

High frequency heating cooking device

PROBLEM TO BE SOLVED: To provide a steam generator and a steam cooker including the same, capable of improving steam generation efficiency, and preventing the burnout of a steam generation heater even when the input voltage of the steam generation heater generating steam is increased. SOLUTION: The steam generator 2 includes a container 6, a heat insulating water supply section 7, a non-heat insulating lower water-holding heat diffusing section 8, and the steam generation heater 9. The water supply section 7 contacts with the water in the container 6, and absorbs the water. The lower water water-holding heat diffusing section 8 contacts with the water supply section 7, absorbs the water from the water supply section 7, and holds the water. Further since the lower water-holding heat diffusing section 8 diffuses heat, the heat of the part contacting with the steam generation heater 9 of the lower water-holding heat diffusing section 8 is diffused, and the temperature of the part excluding the part contacting with the heater rises. Accordingly, since the steam can be generated at the part contacting with the steam generation heater 9 and the part excluding the contact part, in the lower water-holding heat diffusing section 8, the steam generation efficiency can be improved. COPYRIGHT: (C)2010,JPO&INPIT

Steam generator and steam cooker

PROBLEM TO BE SOLVED: To provide a fluid temperature raising device and heating cooker having small watt density and capable of reducing the size. SOLUTION: The heating cooker 1 is provided with a heating chamber 2 storing an object W to be heated, a steam generator 3 for generating steam for heating the object W to be heated, and the fluid temperature raising device 10 for raising the temperature of the steam generated in the steam generator 3, and the object W to be heated is heated and cooked by supplying the steam of which temperature is raised by the fluid temperature raising device 10 to inside of the heating chamber 2. The fluid temperature raising device 10 is provided with an outer cylinder 11 where steam flows, a coil 13 arranged inside the outer cylinder 11, and a heating element 12 which is arranged between the outer cylinder 11 and the coil 13 and to which electromagnetic induction heating is applied by application of high-frequency voltage to the coil 13. COPYRIGHT: (C)2009,JPO&INPIT

Fluid temperature raising device and heating cooker

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Heating cooking device

High frequency heating cooking device

Steam generator and steam cooker

Fluid temperature raising device and heating cooker