Panasonic Intellectual Property Management Co., Ltd.

Mita Industrial Co., Ltd.

Seiichi Yamashita

Takahiro Hayashi

Yuichi Otsuki

Mikio Fukui

Toshifumi Kamiya

Takahide Yamaguchi

Hiroyuki Katsube

Ryosuke Otani

Masato Yota

Jyunko Mizuno

Atsushi Hakamoto

A heating cooker includes a heating chamber, a heating portion, a brushless motor, a body control circuit, a DC power supply circuit, a motor control circuit, and a safety device. The brushless motor drives a rotary drive mechanism included in the heating portion. The body control circuit outputs a drive signal for the brushless motor. The DC power supply circuit supplies DC power to the brushless motor. The motor control circuit controls the driving of the brushless motor in response to the drive signal. The safety device includes a rotation detection element to detect the rotation state of the rotor of the brushless motor and output a rotation detection signal, and a switch for blocking a power supply line connected to the DC power supply circuit. The safety device controls the switch in response to the rotation detection signal and drive signal.

Heating cooker

Cooking apparatus () includes heating chamber () in which an object to be heated is rested, radiant heater unit () provided inside heating chamber () and operating in the preheating mode and cooking mode, and a control unit controlling radiant heater unit (). The control unit is configured to make radiant heater unit () operate in the standby mode, which is a mode after the preheating mode ends and until the cooking mode starts. According to this aspect, the surface temperature of radiant heater unit () is kept at a high level during the standby mode to suppress uneven browning due to variations in the surface temperature of radiant heater unit () when cooking starts.

Cooking apparatus

In a cooker according to the present disclosure, a convection heater for executing a convection mode and a circulation fan are disposed in a convection forming space that is in communication with a heating chamber, and a fan driver is disposed outside of the convection forming space. The cooker includes a leakage suppression mechanism for suppressing a microwave leak from the convection forming space. The leakage suppression mechanism is formed by a coaxial seal for setting a distance between opposing faces, i.e., between a circulation fan shaft passing through a first wall forming the convection forming space and the first wall to a predetermined distance or smaller. Therefore, a microwave leak from a mechanism for executing the convection mode is suppressed, and heat cooking with a microwave-heating mode can highly effectively be performed.

Cooker

In a microwave heating device of the present disclosure, inverter unit drives first and second microwave generators. Cooling unit cools first and second microwave generators and inverter unit. First and second waveguides supplies, to cavity, microwaves generated by first and second microwave generators. First and second microwave generators are disposed side by side in a right-left direction below a bottom surface of cavity. Inverter unit and cooling fan are disposed from the first and second microwave generators toward a front side in order, and first and second waveguides are provided so as to extend in a front-back direction from first and second microwave generators, respectively. According to the present disclosure, the microwave heating device can be further downsized in a right-left direction.

Microwave heating device

Heating cooker () of the present disclosure includes convection device () that includes fan (), heater (), a first air guide, and second air guide, is communicated with heating chamber () through a suction port and a discharge port provided in back wall () of heating chamber (), and supplies hot air to the heating chamber (). Fan () sucks air inside heating chamber () from the suction port into convection device (), and sends out the air from the discharge port into heating chamber (). Heater () is provided in front of fan (), and heats the sucked air. The first air guide is provided so as to surround heater (), and guides the heated air to the discharge port. The second air guide is provided so as to surround fan () and the first air guide, and guides the heated air to the discharge port. A part of the second air guide is in contact with the first air guide, and another part of the second air guide is isolated from the first air guide. According to the present disclosure, it is possible to more uniformly heat the object to be heated.

A moving optical system assembly is disposed under a contact glass for supporting a document on the upper surface of a frame of a copying machine, and comprises a moving frame 2 equipped with a source of light 4, and a document sensor arm 10 which undergoes expansion or contraction accompanying the movement of the moving frame 2, wherein a transparent electrically conducting film 20 is laminated on the upper surface of the document sensor arm 10. This assembly effectively prevents dust from adhering on the lower surface of the contact glass.

Growing community of inventors

Shiga, Japan

Seiichi Yamashita