Heater

Heat exchange – Regenerator – Heat collector

Patent

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Details

165 49, 165236, 165130, 165904, 252 70, F28D 1700

Patent

active

058969144

DESCRIPTION:

BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION

The present invention relates to a heater for use in a room of a dwelling, having a convection surface and in the case, for example, of a hot water heater, a water tank provided with an inlet opening and an outlet opening.
Many embodiments of such heaters are known, for example, as plate heaters or as ribbed radiators, each of which has a considerable radiation surface, In addition, heaters which are optimized with respect to the transmission of heat by convection are also known. They consist, for instance, of fin-like sheet-metal elements which are located closely alongside of each other and are, for instance, arranged in a row on a pipe which passes axially through said sheet-metal elements.
Furthermore, heaters for night storage heating are also known in which a heat storage medium, generally a stone body of high thermal capacitance, is heated during the night by, for instance, electric energy and then gives off heat throughout the day to the room which is to be heated by radiation and convection.
In the case of these known heaters, there can be noted either only a small heat capacity or discomfort as a result of high storage temperatures. In said night storage heaters, the temperature of the heat storage furthermore decreases with increasing liberation of heat. While initially, at high temperatures, there may also, for instance, be a burning of dust and the giving off of odors, this system passes only for a comparatively short period of time through a condition in which heat which is found comfortable is given off.
A certain "tiled stove effect" is sought in the case of such heaters. Heat is to be given off continuously by radiation and convection from surfaces which do not have too high a temperature. Even when there is no further feeding of energy to the heater, as a result, for instance, of the reduction at night in the case of central heating systems, a release of heat which does not drop below the limit of comfort is to be given off still for a certain period of time. This applies in the same way to a temporary priority switching of the heating system to the heating of hot water.
In water heating systems this cannot be obtained due to the fact that the heat-storage capacity is, as a rule, slight. In modern heating systems, the heat storage capacity is particularly low as a result of very small filling volumes. It has also already been proposed to hang in front of heaters ceramic tiles which have a certain, although to be sure slight capacity. They, it is true, provide a certain improvement but they are by far not satisfactory.


SUMMARY OF THE INVENTION

This technical problem is solved by the invention by a separate, closed storage chamber containing a latent heat-storage medium, the storage chamber being at least in radiation heat exchange or convection heat exchange with the convection surface. Therefore, a new type of heater is provided which comprises both a latent heat storage and of a traditional heater structural part. It is essential that the latent heat storage be heated during the course of a normal heating process. If the supply of the heat of the actual heater, for example heaters for the heating of hot water, is shut off, for instance, during the course of a night-time reduction, then the heater nevertheless continues to give off heat from the storage chamber for a comparatively long period of time. Since the storage chamber is filled with latent heat storage material, there is also the effect that the heat is given off practically without any substantial reduction in temperature until the phase conversion of the latent heat storage medium which forms the basis of the latent heat storage is concluded. The arrangement of the storage chamber relative to a convection surface of a traditional heater can be effected in such a manner that the two elements are arranged, with surfaces facing each other, at a certain distance from each other. They are thus substantially in a radiation heat exchange. Upon increase of the temperature of, for instance, the

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Patent Abstracts of Japan, vol. 9, No. 209 (M-407) Aug. 27, 1985 & JP, A, 60 069 491 (Matsushita Denki Sangyo KK) Apr. 20, 1985.
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Solar Energy, vol. 30, No. 4, 1993, Oxford GB, pp. 313-332, Abhat low temperature latent heat thermal energy storage.

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