Kabushiki Kaisha Toshiba

Fusao Hirasawa

Kazuo Saito

Tetsuo Sano

Katuyoshi Kumazawa

Tutomu Hatakubo

Hideto Kuyama

An outdoor unit comprises a combustion unit for presenting combustion heat, a heating medium heating part for heating the heating medium with the combustion heat to vary in phase from liquid to gas, and a heating medium transferring part. A plurality of indoor units each have an indoor heat exchanger and a required heating capacity detecting part for detecting a required heating capacity in a region to be heated required for the indoor heat exchanger. The detecting part comprises a room temperature setting part, a room temperature detector, and a required heating capacity data output part for delivering required heating capacity data in the region to be heated depending on the difference between the preset room temperature and the detected room temperature. The distributing part couples the plural indoor units parallel to the outdoor unit so as to form individual enclosed heating medium circulation cycles. The controller controls the combustion quantity of the combustion unit and the heating medium transferring capacity according to the sum of the required heating capacity data, and controls the heating medium distribution amount of the distributing part for distributing the heating medium into each indoor heat exchanger depending on the ratio of the required heating capacity data.

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Tokyo, Japan

Fusao Hirasawa