Electric resistance heating devices – Heating devices – With heat storage means
Patent
1998-03-18
2000-05-02
Walberg, Teresa
Electric resistance heating devices
Heating devices
With heat storage means
392339, 16510415, 16510419, F24H 704, F28D 1500
Patent
active
060582464
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a heater having a chamber for the circulation of heat conveying medium, which chamber has connections to a heating medium circuit, the chamber preferably at least partly contacting a solid heat storage core. Further, this invention relates to a heating installation having a heater according to the invention using solar energy.
Such heaters or heaters of similar types are for instance used in hot-water central heatings, the heat sources of which are gas firings, oil firings, solid fuel incinerators, but also solar collectors.
DE-U-9401979 discloses a heater having a solid heat storage core through which a heating pipe register extends in a meander-like fashion, hot water flowing therethrough as a heat conveying medium. The heat storage core is penetrated by air passage pipes extending vertically through the heater and being open at their upper and lower ends, which pipes can be closed at their upper opening by means of sliders. These air passage pipes are penetrated by the heating pipe register and allow ambient air to flow upwardly from below through the heater, thereby generating heat convection.
Other known heaters generally consist of a jacket made of sheet metal and having maximum outer surface, inside of which the heat conveying medium heated by the heat source circulates and, while doing so, conveys its heat to the heater jacket and is returned to the heat source after having cooled down. The drawback of such a heater resides in the fact that the heat storage capacity of the heater jacket is rather low. The admission of heat conveying medium to the heater generally takes place intermittently as controlled by a thermostat, so that the heater is constantly subject to a considerable heating and cooling cycle.
SUMMARY OF THE INVENTION
It would be desirable to eliminate the above drawback of the known heater by achieving more uniform heat conveyance by the heater at lower variations of the heater temperature, so that, in particular if solar collectors are used as heat source, but also with others of the above energy sources as heat generators, no undesirable heat variations occur when heating a room.
This invention can overcome above-described problem by providing a heater characterized in that it further includes a container made of heat conducting material to be filled with heat storage fluid, the chamber extending at least partly through the container, the chamber and the container being in a thermally conducting relation without fluid communication.
Thus inside this heater according to the invention there is a large heat storage mass which is heated by the heat conveying medium in the heating circuit and then gradually conveys the heat stored to its environment. The temperature of the heat storage mass inside the heater may be controlled manually or by means of a thermostat, just as the conveyance of heat by the heater, but independent thereof.
Depending on whether more rapid conveyance of heat to the heat storage mass is desired or slow constant withdrawal is to be effected, in the first case conveniently water or an organic heat storage liquid is used as heat storage mass, while in the second case, chamotte, marble or the like are preferred as heat storage core, which is of particular advantage in the case of homes not inhabited for a prolonged period of time, like second homes, in combination with solar collectors so as to avoid damage by frost.
Of course the container for heat storage fluid and the solid heat storage core may also be used in combination, the container for heat storage fluid being empty when the heater is delivered and mounted and only will be filled after it has been mounted. Preferably the container for heat storage fluid has additional sealable openings for deaerating and emptying.
The heater according to the invention is suitable for installation in all known hot-water central heatings as well as for use in solar collector heatings with circulating pumps.
According to one embodiment of the invention the chamber fo
REFERENCES:
patent: 3301251 (1967-01-01), Jackson
patent: 3356828 (1967-12-01), Furness
patent: 3958755 (1976-05-01), Cleer, Jr.
patent: 4153104 (1979-05-01), Ruder
patent: 4200783 (1980-04-01), Ehret
patent: 4474171 (1984-10-01), Caproon et al.
Lackner Franz
Werner Franz Stefan
Campbell Thor S
Walberg Teresa
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