Heating device with hot water supply function

Abstract

A heating device with hot water supply function includes: a combustion means; a first heat exchanger; a circulation passage that connects the first heat exchanger and an room heating unit; a circulation pump; a bypass passage that branches off from the circulation passage; a second heat exchanger for hot water supply provided in the bypass passage; a cold water supply passage; a hot water supply passage for supply of hot water from the second heat exchanger; and a distribution means that is provided at a branching section and whose distribution ratio can be adjusted, so that it becomes possible selectively to execute either only room heating operation, or only hot water supply operation, or simultaneous room heating operation and hot water supply operation; wherein the hot water supply outlet, the thermal medium inlet, and the room heating outlet of the distribution means are at the same height.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a heating device with hot water supply function that performs room heating by supplying heat produced by combustion to a thermal medium for room heating, and that also performs supply of hot water by supplying heat to cold water by heat exchange with the thermal medium for room heating; and in particular relates to a heating device with hot water supply function that is capable of performing room heating operation and hot water supply operation simultaneously.[0002]In the prior art, heating devices with hot water supply function that are capable of performing changeover between room heating operation and hot water supply operation have been widely employed in practice. Such a heating device with hot water supply function typically comprises a combustion means, a heat exchanger, a circulation passage that connects between the heat exchanger and a room heating unit that is installed inside a building, a circulation pump...

AI Technical Summary

Benefits of technology

The present invention provides a distribution valve with hot water supply, thermal medium inlet, and room heating outlet at the same height. This design prevents the thermal medium from stagnating within the distribution valve, ensuring satisfactory drainage performance during maintenance. Additionally, when room heating operation has stopped, the circulation of the thermal medium has ceased, and no flow of the thermal medium will occur from the thermal medium inlet towards the hot water supply outlet due to the propulsive force of natural convection, thus preventing unanticipated supply of heat to the hot water in the heat exchanger, resulting in a satisfactory hot water output characteristic during supply of hot water. The patent text also describes how the heat exchanger for hot water supply and the distribution valve can be easily and simply arranged in limited space within the heating device.

Problems solved by technology

Due to this, it is possible to obtain satisfactory drainage performance when the thermal medium is drained during maintenance or the like, since it is difficult for the thermal medium to stagnate within the distribution valve.

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