Matsushita Electric Industrial Co., Ltd.

Takashi Iwasa

Hiroyuki Ogino

Yasukiyo Ueda

Masahiro Inoue

Hiroaki Yonekubo

Yoshiaki Watanabe

Hirokuni Murakami

Kenji Yoshinaga

Munehiko Tokumoto

Risho Miyoshi

Katsumi Hirata

A human body detector for a seat which does not deteriorate comfort of sitting even when it is disposed on the seat, has a high sensitivity and can be easily fitted to the seat. Vibration detection means (,) is disposed in such a manner that even when a person is seated, the means (,) comes into contact with the bottom surface of a seat pad (,) of a seat (,) and accordingly the person does not feel the means (,). According to this construction, the human body does not easily feel the means (,) by the provision of the seat pad (,), the existence of the vibration detection means (,) is hardly felt even when the hardness and the shape are changed, and various measures for improving the sensitivity of the vibration detection means (,) can be taken. The vibration detection means (,) may be merely bonded to the seat pad (,) or may be fixed to a seat spring (,) or a seat frame (,), and can be fitted more easily to the seat (,) than when it is disposed below a surface cloth (,) of the seat (,).

Human body sensor for seat

An automatic hot water supply apparatus produces and supplies hot water by mixing, with a hot water/cold water mixing valve, hot water supplied from an instantaneous water heater unit through a hot water supply pipe and cold water supplied through a cold water supply pipe. The automatic hot water supply apparatus includes a flow rate control valve actuatable by an electric actuator, and a flow rate limiting unit responsive to a hot water temperature setting, or a season setting, or a detected hot water temperature, for varying the flow rate of mixed hot water. The electric actuator is controlled by a signal from the flow rate limiting unit to operate the flow rate control valve in order to solve the problems of a low water temperature during the winter, an excessive hot water flow rate, and a low instantaneous water heater unit capability, so that the automatic hot water supply apparatus can supply hot water at a desired temperature.

Automatic hot water supply apparatus

The automatic temperature control device for an electric appliance such as an electric blanket comprises a heater element, a sensor made of a thermosensitive material having an impedance, which changes as the temperature varies, for detecting the temperature of the heater element, switching means for regulating the supply of electric power to the heater element, and a plurality of electric circuits for driving the switching means in response to the output signal from the sensor. The plurality of electric circuits function to prevent the sensor from being polarized and to detect a temperature signal by applying thereto an alternating current, to detect a failure occurring in the electric circuits in synchronism with zero-crossing pulses, and to detect a failure occurring in the switching means, thereby assuring a safe operation of the automatic temperature control device against the occurrence of any failure.

Automatic temperature control device for an electric appliance such as

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Nara, Japan

Takashi Iwasa