Matsushita Electric Industrial Co., Ltd.

Ryuta Kondo

Satoshi Matsumoto

Hiroaki Yonekubo

Hideho Shinoda

Takeshi Watanabe

Hideki Ono

Satoshi Imabayashi

Shinichi Maruyama

Keijiro Kunimoto

A flash water heater using a heat pump includes a heat exchanger in which a refrigerant flow path exchanges heat with a water flow path. Tap water is led directly to the water flow path, and hot water supplied from the water flow path is used. The water heater includes at least one of the following elements: 1) a load setter for setting a heating amount in the heat exchanger, and a heating controller for regulating a heating amount in response to an amount set by the load setter; 2) a heater for heating water flowing through the water flow path in the heat exchanger and water flowing the path before and after the heat exchanger; 3) plural compressors; and 4) plural heat-pump cycles. The water heater is excellent in start-up of hot water temperature when the hot water supply starts, controllability, and efficiency.

Heat pump water device

An apparatus for washing human privates including a water heater (,), which is connected with a water supply pipe (,) and a hot water pipe (,) such that wash water supplied from the water supply pipe (,) is heated to a proper temperature by the water heater (,) while proceeding to the hot water pipe (,) through the water heater (,). A water supply controlling device (,) controls the supply of wash water to the water heater (,). A discharge device (,) is provided for discharging to the human privates the wash water heated to the proper temperature by the water heater (,), which is connected with the hot water pipe (,). An air mixing device (,) is employed for mixing air into the wash water, and a controller (,) selectively controls the amount of air mixed into the wash water by the air mixing device (,).

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Nara, Japan

Ryuta Kondo