| 摘要 |
PURPOSE: A heating heat exchanger of a multi-layered coil type is provided to make constitution compact and to maximize heat exchange efficiency by widening the heat exchange area. CONSTITUTION: In a heating heat exchanger(1) of a multi-layered coil type, plural coil-type heat exchange pipes(6) are installed in a double cylinder body of an outer cylinder body(2a) and an inner cylinder body(2b) in a state of forming horizontal wall bodies through reciprocal adhesion. The gap parts formed between the layers of the coil-type heat exchange pipes form spiral tunnels and thus the stay of a flame and heat in the heating heat exchanger is increased and size reduction, weight reduction, and high efficiency are achieved. The outside diameters of the coil-type heat exchange pipes become larger toward the outside from the inside, to make flux of refrigerant gas flowing in each coil-type heat exchange pipe equal. Some of the coil-type heat exchange pipes are used for heating and some of the coil-type heat exchange pipes are sued for bathing, and some of the coil-type heat exchange pipes are used for a washstand.
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