Matsushita Electric Industrial Co., Ltd.

Matsushita Electrical Industrial Co., Ltd.

Mitsuo Akiyoshi

Kazumi Hirai

Yoshio Mitsumoto

Satoru Kodama

Ichiroh Hori

Kenji Watanabe

Chikao Nakano

Shigeki Ueda

Shinichi Sakai

Takashi Asahina

Yuji Hayakawa

Hirofumi Yoshimura

Teruhisa Takano

Kimiaki Yamaguchi

Masaaki Sano

Isao Kasai

Takahiko Yamasaki

Hitoshi Kurita

Toyotsugu Hatagawa

Masaharu Tsujimoto

Susumu Murakami

Ichiro Hori

Kaeko Nishimoto

Akinori Otsuka

There is disclosed a heating cooking device including a heating chamber for heating an object to be heated, a high-frequency oscillator for generating high-frequency electromagnetic waves, a wave guide for guiding the high-frequency electromagnetic waves from the high-frequency oscillator to the heating chamber, a rotary table for supporting thereon the object to be heated for rotation therewith, and a wave stirrer fan for stirring the electromagnetic waves in the heating chamber. A feeder port of the wave guide is disposed at a side of the heating chamber, and the wave stirrer fan is disposed within the wave guide in opposed relation to the feeder port. The high-frequency oscillator is disposed on the side of the feeder port. The feeder port is larger in size than the wave stirrer fan.

Heating cooking device having a wave guide and feeder port disposed

A heating apparatus such as a microwave oven in which thermal energy of high-temperature vapor generated by heating an object is detected by a pyroelectric element and a resulting detection signal is used to control (stop) a heat source such as a microwave source, etc. Among AC voltages generated by the pyroelectric element due to heat exchange of the pyroelectric element, a voltage of a polarity generated at the time of heat discharge (temperature decrease) of the pyroelectric element is selected through a circuit means. A voltage generated by heat exchange between air moving slowly in a heating chamber and the pyroelectric element caused by the rotation of a turntable or the like is eliminated by another circuit means. A control section controls the operation of the heat source by deciding an output signal of the pyroelectric element by comparing it with a detection level determined in accordance with a noise level for a predetermined length of time after the start of the heating operation. Erroneous detection is thus prevented which otherwise might be caused by a noise voltage generated in the pyroelectric element by the thermal energy of a hot air staying in the heating chamber after the energization of the heat source or second heat source.

Heating apparatus

A pressure cooker with a humidity sensor or gas sensor, wherein a micro-computer reliably detects the point at which the internal pressure of a pressure cavity reaches a prescribed value by using this sensor by detecting the point at which a pressure control valve begins to operate and begins to discharge a large quantity of excess vapor or gas etc. from the pressure cavity to the outside, with a result which is equivalent to that of a direct measurement of the internal pressure with a pressure sensor, thereby attaining an accurate measurement without bringing the humidity or gas sensor into contact with the pressure cavity.

Pressure cooker with sensor

A heating apparatus measures the operation time and the inoperative time using an operation equation to switch the magnitude of the thermal supply of the heating apparatus in accordance with the calculated values. The heating apparatus includes a heater as a heating thermal supply, a heating chamber to be heated by the heater, a driving device for controlling the supply energies to the heater, a parameter operation device for calculating, in accordance with a given operation equation, the parameter corresponding to the supply energies to the heater, an output deciding device for comparing the parameter operation value obtained by the parameter operation device with the given target value to decide the output level of the heating thermal supply. The parameter operation value is increased in accordance with the given operation equation by the parameter operation device during the energization into the heater, and when the value has reached the given value, the output deciding means increases or cuts off the average power to the heater.

Heating apparatus having an open-loop configuration for controlling

This invention relates to a heat cooking apparatus having a flat heater firmly attached to an outside surface of the wall surface of the heating chamber the flat surface being composed of flatly configured heating elements with a heat-proof insulator therebetween. Also, by forming a non-metallic layer on the inner surface of the metallic wall surface facing the heating elements, heat from the heater is efficiently and uniformly conducted so as to perform uniform heating and high heat-cooking efficiency.

Heat cooking oven having flat heater units on the outside of the walls

A heating and cooking apparatus has a kneading trough detachably installed in a heating chamber of the apparatus and provided with a handle for easy carrying for a user. Since both the kneading trough and a portion to be engaged with the kneading trough in the heating chamber are formed square, the force in the rotating direction during the operation can be positively received by the corners, thereby enhancing the strength of the apparatus, without rattlings or wearing-out or disengagement of the engaging portion therebetween.

Installation method of a kneading trough in an oven and its apparatus

A high frequency heating apparatus wherein oven heating and grill heating are performed by means of a flat heating element, and no heater and projections such as an insulator for holding a heater are provided, whereby, when high frequency microwave energy is supplied to the heating chamber with an oven plate placed in the heating chamber, abnormal heating such as local heating and sparks do not occur. Also, with the oven plate placed in the heating chamber, heating can be performed by means of high frequency microwaves and a heater which can be used alternately or in combination depending on situations to obtain the most preferably heating condition.

High frequency heating apparatus with electric heating device

A heat cooking apparatus is provided with a heater comprising a plurality of metal, electric heating wires and a plurality of mica to insulate said wires, which is formed as a flat shape to provide on the outside of the heating chamber with substantially the same area as the ceiling of heating chamber, and which is firmly mounted onto said ceiling of the heating chamber by a heat resistant insulator and a metal keep plate.

Heat cooking apparatus having a flat flexible heater

A cooking apparatus comprising a rotary table disposed inside a heating chamber so as to mount food to be heated, and a motor which rotates the rotary table. The rotary table and the motor are integrally supported in a floating state by a resilient member, thereby allowing the food and the rotary table to vibrate or move vertically. This vertical vibration or movement is measured by employing a detector, and the weight of the food is measured from the output of the detector. The rotary table is provided with a biasing means interlocked with a door for regulating the height of the rotary table or stabilizing the same when the door is opened. In the case where the vibration of the rotary table is particularly detected, the rotary table is forced to vibrate by the action of the biasing means thereby allowing highly accurate measurement of the weight of the food. The output of the heating source, the heating mode and the heating time are controlled in correspondence with the measured weight of the food, and it is therefore possible to improve the cooking apparatus such that it is conveniently used and to realize a finely controlled heating operation.

Cooking apparatus with weighing device

A cooking apparatus includes a rotary table which is disposed inside a heating chamber such as to mount a food to be heated, and a motor which rotates the rotary table. The rotary table and the motor are integrally supported in a floating state by a resilient member, thereby allowing the food and the rotary table to vibrate or move vertically. This vertical vibration or movement is measured by employing a detector, and the weight of the food is measured from the output of the detector. The rotary table is provided with a biasing means interlocked with a door for regulating the height of the rotary table or stabilizing the same when the door is opened. In the case where the vibration of the rotary table is particularly detected, the rotary table is forced to vibrate by the action of the biasing means thereby allowing highly accurate measurement of the weight of the food. The output of the heating source, the heating mode and the heating time are controlled in correspondence with the measured weight of the food, and it is therefore possible to improve the cooking apparatus such that it is conveniently used and to realize a finely controlled heating operation.

A microwave oven in which the heating chamber is defined by an upper portion serving as a door opening upwards and a lower portion forming the oven chamber lower portion for constituting, upon closure of the door, one complete heating chamber, in one side of which heating chamber, microwave assembly and stirrer members are advantageously incorporated for simplification of the heating chamber construction and compact size of the oven, with the stirrer members which are rotated by the passage of cooling air thereover being disposed in positions symmetrical with respect to the central vertical axis of the heating chamber for efficient microwave energy distribution and consequent uniform heating of the object to be heated.

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Nara, Japan

Mitsuo Akiyoshi