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US 5,896,914 AGranted
Heater
AssigneeST Speicher-Technologie GmbH
InventorsKlaus Fieback, Lutz Kutzker, Thomas Kramer, Michael Matthai, Gunter Hildebrand
Life of this patent
Estimating the term…
Abstract
The invention relates to a heater (1) for use in a room of a dwelling, preferably with a convection surface (3) and, in the case, for example, of a hot-water heater, with a water tank with an inlet and an outlet aperture. To obtain a design more advantageous concerning the use, the heater according to the invention has a separate closed storage chamber (7) containing a latent heat storage medium (8), the storage chamber (7) being heatable by radiation, convection or electrically.
Claims22
A latent heat storage medium comprising
- a base of paraffin hydrocarbons, the latent heat storage medium being formed of a mixture of the paraffin hydrocarbons, of different grade, of different melting points, wherein,
- up to about 30% of the volume of the latent heat storage medium has a melting point which is up to about 25.degree. K. below a main operating range of the latent heat storage medium,
- said main operating range being defined by the melting point of a largest portion of the mass of the latent heat storage medium with at least about 60 per cent by volume of the latent heat storage medium, there being a reduction of strain on material of a storage chamber filled with the latent heat storage medium resulting from slight contraction and expansion in volume occurring upon passing through melting point temperature phase conversion.
Dependencies are inferred from the claim text.