Matsushita Electric Industrial Co., Ltd.

Susumu Yamano

Norio Yoshida

Naomi Goto

Minoru Fukumoto

Makoto Yoshida

Teruo Nakagawa

In an inverter apparatus for converting a direct current to an intermittent current by a converter configured by parallel-connected plural pairs of serially-coupled switching elements, resistance loads are connected across output terminals of the converter and a positive terminal or a negative terminal of a direct current source, and a direct current output can be supplied to the resistance loads from the inverter apparatus by controlling the converter at a low frequency.

Inverter apparatus

An automotive vehicle such as, for example, an electric car is provided with a liquid heating and circulating apparatus for heating the interior of the vehicle body. The liquid heating and circulating apparatus is provided with a main tank containing liquid, a heater mounted in the main tank for heating the liquid, and a pump for circulating the liquid heated by the heater. The liquid heating and circulating apparatus is also provided with a water supply unit connected to the main tank and accommodating a pressure relief valve assembly, and an auxiliary tank connected to the water supply unit. The pressure relief valve assembly is operated according to predetermined pressures within the main tank to place the main tank in communication with the auxiliary tank.

Liquid heating and circulating apparatus for use in an automotive vehicle

In a device for heating and circulating a fluid for vehicles wherein a fluid heating and delivering unit for heating and delivering a fluid, and a car room heat exchanger are annularly connected together to circulate the fluid in order to heat a car room, a bypass passage is installed in a fluid passage between the fluid heating and delivering unit and the car room heat exchanger, such that the bypass passage extends in a close vicinity to batteries to heat said batteries. The heated fluid for heating the car room is utilized to heat the batteries for driving the vehicle, so that the decrease of the battery temperature can be suppressed and the battery performance improved.

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Kusatsu, Japan

Susumu Yamano