Sharp Kabushiki Kaisha Corporation

Masanobu Fujii

Tatsuya Tsuda

Yuzi Ando

Masato Nakatani

Yuichi Mori

Hirokazu Tahara

A heating appliance including a heat source for heating air, a convection fan for blowing the heated air into a heating chamber, and an infrared radiator disposed in the path of the heated air.

Infrared ray heating appliance utilizing a convection fan

A heating appliance including a microwave heating source for heating an object, and an infrared ray heating source for heating the object in response to the operation of the microwave heating source by receiving energy from the microwave heating source and thus radiating infrared rays. Therefore, infrared ray heating is carried out in addition to the microwave heating.

Microwave heating and infrared ray heating appliance

A humidity detecting circuit for detecting the ambient humidity in a cooking chamber, which includes a constant current source, a first temperature-detecting resistor self-heated by the constant current source to detect the ambient humidity and having one terminal connected to an output terminal of the constant current source, and a second temperature-detecting resistor having one terminal connected to the one terminal of the first temperature-detecting resistor to detect the ambient temperature. An operational amplifier having an inverting input terminal, a noninverting input terminal and an output terminal is provided, the inverting input terminal being connected to the other terminal of the second temperature-detecting resistor so that the terminal voltage of the first temperature-detecting resistor may be inputted into the inverting input terminal through the second temperature-detecting resistor. A feedback resistor is associated with the operational amplifier and has one terminal connected to the output terminal of the operational amplifier and an other terminal connected to the inverting input terminal of the operational amplifier.

Humidity detecting circuit

A humidity detector includes a first heat-sensing element for an electric signal corresponding to the temperature of steam to be detected and a second heat-sensing element for an atmosphere temperature whose vapor is to be detected or a temperature close to it. A comparator compares the electric signals from the first and second heat-sensing elements. The vapor detection characteristics may be adjusted through variation in the heating temperature of the first heat-sensing element.

Growing community of inventors

Yao, Japan

Masanobu Fujii