Aisin Seiki Kabushiki Kaisha

Shigenori Haramura

Masami Inada

Yutaka Momose

Tetsumi Watanabe

Seiji Hayakawa

Toshihiro Nozaki

Sadayuki Matsuoka

An outdoor unit for a heat pump is usable under very cold weather conditions since the outdoor unit includes an auxiliary heating system which heats a heat exchanger in order to prevent the heat exchanger from forming frost and which also compensates for the decline in heating capacity. Further, the outdoor unit has an air flow preventing arrangement which prevents the flow of air through the heat exchanger when the absorption of the heat from the atmosphere is not efficient. The outdoor unit drives compressors by an internal combustion engine in order to reduce the consumption of electric power and the coolant for the engine is also utilized to provide auxiliary heat to the heat exchanger. The outdoor unit also includes a boiler to compensate for the lack of heating capacity in the engine waste heat. The boiler is operated when the atmospheric temperature is less than the predetermined value.

Outdoor unit for a heat pump

A temperature controller for controlling the tube wall temperature of a heater for absorbing heat during Stirling engine operation includes an operator circuit setting a pre-set temperature based on the pressure of the high pressure working medium. Such preset temperature is transmitted to an air-fuel rate controller for controlling the temperature at the heater to keep an optimal working condition of the engine.

Temperature control system for stirling engine

An engine-compressor comprising a stirling engine which includes a plurality of working cylinders, a plurality of working pistons respectively disposed in the working cylinders for axial reciprocating movements to thereby divide each of the cylinders into an expansion space and a compression space, the expansion space in one of the cylinders being connected through a heating device and a heat accumulating device with the compression space in another cylinder, a plurality of guide cylinders, a plurality of guide pistons disposed respectively in the guide cylinders for axial reciprocating movements, the guide piston being connected through piston rods with respective ones of the working pistons, and a swash plate or a crank device for converting the axial reciprocating movement of the guide piston into a rotating movement; a compressor including compression chambers defined in respective ones of the guide cylinders by the guide piston, intake valves provided in the compression chambers for admitting air thereto, and outlet valves provided in the compression chambers for taking the air out of the compression chambers.

Growing community of inventors

Toyoake, Japan

Shigenori Haramura