| 摘要 |
The present invention relates to a fluid heating system (10) to be used in connection with a boiler or the like and more particularly relates to a heat exchanger type device which can supply a large quantity of hot fluid such as water without the necessity of oversizing the boiler and with most effective heating performance. The heating system (10) comprises a primary fluid circuit (16) connected to the boiler and a secondary fluid circuit (18) supplying the necessary hot fluid typically for domestic use. The secondary fluid circuit (18) comprises a plurality of coiled tubes (38) of small diameter which are immersed in the fluid of the primary circuit (16) which is circulated in a tank (10). The coils of the coiled tubes (38) of the secondary circuit (18) are slightly spaced apart one from another thereby allowing for an optimum heat exchange between the fluids of the primary and secondary circuits (16, 18). The fluid to be heated which circulates in the secondary circuit (18) is preferably city water. An injection plate (24) is provided at the entry of the fluid of the primary circuit (16) in the tank (10) so as to distribute the heating fluid substantially uniformly in the tank (10) and which causes some turbulence in order that all of the coiled tubes (38) of the secondary circuit (18) are heated by the primary fluid in a substantially uniform manner and also in order to increase the heat exchange.
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