| 摘要 |
The present invention relates to a fluid heating system to be used in connection with a boiler or the like and more particularly relates to a heat exchanger system 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 system comprises a primary fluid circuit connected to the boiler and a secondary fluid circuit supplying the necessary hot fluid. The secondary fluid circuit comprises a plurality of coiled tubes of small diameter which are immersed in the fluid of the primary circuit which circulated in a tank. The coils of the coiled tubes of the secondary circuit are slightly spaced apart one from another thereby allowing for an optimum heat exchange between the fluids of the primary and secondary circuits. The fluid to be heated which circulates in the secondary circuit is preferably city water. An injection plate is provided at the entry of the fluid of the primary circuit in the tank so as to distribute the heating fluid substantially uniformly in the tank and which some turbulence in order that all of the coiled tubes of the secondary circuit are heated by the primary fluid in a substantially uniform manner and also in order to increase the heat exchange.
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