Fluid heating system

F - Mech Eng,Light,Heat,Weapons – 28 – D

Patent

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Details

F28D 7/02 (2006.01) F24J 3/00 (2006.01) F28F 27/02 (2006.01)

Patent

CA 2168945

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.

La présente invention concerne un système (10) pour chauffer un fluide, destiné à être utilisé en combinaison avec un chauffe-eau ou similaire et, plus particulièrement, un dispositif du type échangeur thermique qui peut fournir une grande quantité d'un fluide chaud tel que l'eau chaude, sans avoir à surdimensionner le chauffe-eau et en assurant une efficacité de chauffage optimum. Le système de chauffage (10) comprend un circuit de fluide primaire (16) connecté au chauffe-eau et un circuit de fluide secondaire (18) fournissant le fluide chaud nécessaire, habituellement l'eau pour les utilisations domestiques. Le circuit de fluide secondaire (18) comprend une pluralité de tubes en serpentin (38) avec un diamètre qui est petit et qui sont immergés dans le fluide du circuit primaire (16) circulant dans un réservoir (10). Les serpentins (38) du circuit secondaire (18) sont légèrement espacés les uns de autres, ce qui permet un échange thermique optimum entre les fluides du circuit primaire et du circuit secondaire (16, 18). Le fluide à chauffer qui circule dans le circuit secondaire est de préférence l'eau de robinet. On prévoit une plaque d'injection (24) à l'entrée du fluide dans le circuit primaire (16) du réservoir (10), ayant pour rôle de répartir le fluide de chauffage d'une manière sensiblement uniforme dans le réservoir (10) et d'y créer des turbulences pour que la totalité des serpentins (38) du circuit secondaire (18) soient chauffés par le fluide primaire d'une manière sensiblement uniforme et également pour augmenter l'échange thermique.

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