FR2561361A1

FR2561361A1 - Combined electric boiler with accumulator

Info

Publication number: FR2561361A1
Application number: FR8404612A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1984-03-19
Filing date: 1984-03-19
Publication date: 1985-09-20
Also published as: FR2561361B1

Abstract

The subject of the present invention is a combined electric boiler with accumulator for a central heating installation. It comprises an enclosure 4 which is divided by a plate 5 thus constituting a heating zone comprising immersion heaters 1, a coil 2 for the heating of the domestic water and an accumulation zone containing the hot water for heating and the domestic hot water contained in the buffer tank 3. The circulation of water of variable temperature in the coil has practically no influence on the hot water for heating accumulated. The buffer tank 3 avoids spasmodic operation of the boiler during a short-duration requirement for domestic hot water. This electric boiler may be used in any type of private habitation without modifying the electric power installed.

Description

Chaudière électrique mixte h accumulation
la présente invention a pour objet une chaudiere électrique à accumulation pour la production d'eau chaude sanitaire et pour une installation de chauffage central.Combined electric boiler with accumulation
the present invention relates to an electric storage boiler for the production of domestic hot water and for a central heating installation.

Les installations de chauffage utilise la plupart du temps le gaz,le charbon,le mazout comme eombustible,l'inconvenient de ces systèmes étant la nécessité d'un stockage important ainsi que des moyens d'évacuetion des résidus de combustion.L'utilisation du gaz pose des problèmes de sécurité qui sont surmonter efficacement en ajoutant des organes qui augmentent le coût de l'instal- lation. Heating systems mostly use gas, coal, fuel oil as fuel, the drawback of these systems being the need for large storage as well as means of evacuating combustion residues. gas poses safety problems which are effectively overcome by adding components which increase the cost of the installation.

l'utilisation de l'énergie électrique supprime ces inconvénients mais pour des raisons d'économies d'électricité on a construit des chaudières .i accumulation fonctionnant pendant la nuit, mettant en oeuvre des volumes importants d'eau ou des corps solides emmagasinant de l'énergie à haute température. the use of electrical energy eliminates these drawbacks, but for reasons of electricity savings, boilers have been built. Accumulation operating overnight, using large volumes of water or solid bodies storing l energy at high temperature.

la présente invention vise,pour remédier aux inconvénients ci-dessus, concilier l'effet d'accumulation avec une faible puissance consommée,et l'appareil ni en fait l'objet se distingue par un réservoir(4) d'une contenance de IIOlitres constitué en tole d'acier et isolée thermiquement par une conche de matière isolante. the present invention aims, to remedy the above drawbacks, to reconcile the effect of accumulation with a low power consumption, and the device or in fact the object is distinguished by a tank (4) with a capacity of IIOlitres made of sheet steel and thermally insulated with a cone of insulating material.

Le dessin annèxé représent le système faisant l'objet de l' invention. The appended drawing represents the system which is the subject of the invention.

L'enceinte métallique(4) est divisée en deux par une plaqua (5) qui n pour fonction de séparer l'eau qui est chauffée par les deux thermoplongeurs(I) et l'eau ainsi chauffée qui s'accumule dans la partie supérieure de l'enceinte et dans le réservoir tampon(3). The metal enclosure (4) is divided in two by a plate (5) which has the function of separating the water which is heated by the two immersion heaters (I) and the water thus heated which accumulates in the upper part of the enclosure and in the buffer tank (3).

Ainsi le volume d'eau chauffée est approximativement la moitié du volume de l'enceinte.La plaque précédemment citée est percée de plusieurs trous circulaires formant une couronne autour d'un trou @@entral,de plus les coins de la plaque ont été coupés ainsi ces orifices permettent un change de chaleur entre les deux compartiments.Thus the volume of heated water is approximately half the volume of the enclosure. The aforementioned plate is pierced with several circular holes forming a crown around a hole @@ entral, moreover the corners of the plate have been cut thus these orifices allow a heat change between the two compartments.

La transmission des calories s'effectue de bas en haut assurant le chauffage de liteau sanitaire contenue dans le serpentin.Ledit serpentin qui est par exemple en cuivre a une forme circulaire,sa hauteur est égale à environ les 2/3 du compartiment "chauffage",l'une des extrémités est reliée au tuyau en cuivre(9) amenant l'eau froide sanitnire ,on lui a donné la forme d'une spirnle pour permettre un échange de chaleur entre l'eau froide contenue dans ladite spi rale et l'eau du compartiment "chauffage".Cette spirale d'un diamètre inférieur à celui du trou central est situé au dessous de cette-dernière.The calories are transmitted from bottom to top ensuring the heating of the sanitary batten contained in the coil. Said coil which is for example made of copper has a circular shape, its height is equal to approximately 2/3 of the "heating" compartment. , one end is connected to the copper pipe (9) bringing the sanitary cold water, it has been given the shape of a spiral to allow a heat exchange between the cold water contained in said coil and the water from the "heating" compartment. This spiral with a diameter smaller than that of the central hole is located below the latter.

Au milieu de cette spirale on place un capteur de température(7) qui relié nu système de commande par thermostnt fixe le moment de mise en fonctionnement de la chaudière. In the middle of this spiral, a temperature sensor (7) is placed which is connected to a control system by thermostnt which fixes the moment when the boiler is put into operation.

L'autre extrémité du serpentin est relié a un réservoir tampon(3) qui d'éviter que des appels d'eau chaude de courte durée ne provoque un fonctionnement saccadé de la chaudière.Le haut du réservoir tampon est relié au tuyau en cuivre(8) qui constitue le départ "eau chaude sanitaire11. The other end of the coil is connected to a buffer tank (3) which prevents short-term hot water calls from causing the boiler to run jerky. The top of the buffer tank is connected to the copper pipe ( 8) which constitutes the "domestic hot water" outlet11.

Te chauffage de l'eau est confié à deux thermoplongeurs(I) d'une puissanee respective de 2,5 KWh,chacun étant situé à environ IOem du fond de l'enceintegees thermoplongeurs ont une forme de"S aplati", leur base étant fixé contre la paroi arrière de l'enceinte.Pour une meilleure éfficacité les tuyaux d'arrivée d'eau froide de chauffage(63 sont pres des thermoplongeurs,le nombre de tuyaux d'arrivée étant de trois,un sur chaque face latérale de l'enceinte et un entre les deux thermoplongeurs.Sur le dessus de l'enceinte un tuyau(IO)de cuivre constitue le départ eau chaude chauffage. The heating of the water is entrusted to two immersion heaters (I) with a respective power of 2.5 KWh, each being located approximately 10 mm from the bottom of the immersion heater enclosure. They have a "flattened" shape, their base being fixed against the rear wall of the enclosure. For better efficiency the cold water inlet pipes for heating (63 are near immersion heaters, the number of inlet pipes being three, one on each side face of the enclosure and one between the two immersion heaters. On the top of the enclosure a copper pipe (IO) constitutes the hot water heating outlet.

Sur le plan fonctionnel la chaudière travaille le plus souvent à cause dtappel d'eau chaude sanitaire.En effet lorsque la demande d'eau se prolonge dans le temps la temperature à l'intérieur de la spirale(II) diminue ce qui provoque à partir d'un certain seuil l'alimentation des éléments chauffants.la chaudière s'arrete lorsque l'eau sanitaire atteint la temperature préfixée par le thermostat.Ce cycle étant trés court devant l'inertie du volume d'eau contenu dans le compartiment "accumulation",la temperature de l'eau de chauffage ne chnnge pratiquement pas. On the functional level, the boiler works most often because of the demand for domestic hot water. Indeed when the demand for water is prolonged in time the temperature inside the spiral (II) decreases which causes to leave of a certain threshold the supply of the heating elements. the boiler stops when the domestic water reaches the temperature prefixed by the thermostat. This cycle being very short in front of the inertia of the volume of water contained in the compartment "accumulation ", the temperature of the heating water hardly changes.

Expérimentalement on constate qu'apres une periode transitoire correspondant à la mise en charge de la chaudière vis à vis de son environnement,le temps de fonctionnement journalier est de l' ordre de 8 à I6h.L'expérience prouve d'autre part ciue la puissance nominale totale 5KWh est suffisante pour avoir une température ambiante de I9(: dans une habitation de type F5 pour un minium extérieur de -5iC durant la nuit. Experimentally we note that after a transitional period corresponding to the loading of the boiler with respect to its environment, the daily operating time is of the order of 8 to 16 hours. Experience also proves the total nominal power 5KWh is sufficient to have an ambient temperature of I9 (: in an F5 type dwelling for an outdoor minimum of -5iC during the night.

Cette chaudière dont les dimensions sont de 1,34m de haut sur 0,50m de large permet d'avoir un volume d'accumulation de l'ordre de 50 litres n'est pas plus encombrante qu'une chaudière classique fonctionnant au mazout. This boiler, the dimensions of which are 1.34m high and 0.50m wide, makes it possible to have an accumulation volume of the order of 50 liters. It is no more cumbersome than a conventional oil-fired boiler.

Bien que les principes de la présente invention aient été décrits en relation avec des exemples particuliers de réalisation,il faut comprendre que ladite description n'a- été faite qu'a titre d'exemple et ne limite pas la portée de l'invention. Although the principles of the present invention have been described in relation to particular exemplary embodiments, it should be understood that said description has been made only by way of example and does not limit the scope of the invention.

Claims

I. Electric boiler for central heating installation and for the production of domestic hot water, characterized in that it comprises a rectangular enclosure containing the water to be heated, said enclosure being divided into two parts by a metal plate pierced with holes, said enclosure being provided with two immersion heaters arranged horizontally, said immersion heaters ensuring the heating of the eas contained in said enclosure and indirectly that of the water contained in the coil said coil being connected to a buffer tank.

2. Electric boiler according to claim I characterized in that the corners of said plate are cut and in that circular holes are located around the center of said plate, said center also being cut.

3. Electric boiler according to claims I and 2, in that the immersion heaters are placed at the lower end of the rear face of said enclosure and in that the body of the immersion heaters is near the cold water inlet. of the heating system.

4. Electric boiler according to claims there 3 charac trisse in that the coil is located under the plate subject of claim 2 and in that one end of said coil, connected to the t @ yau arrival " sanitary cold water ", is connected to a spiral and pregnant said spirnle is located under one of the orifices of said plate.

5. Electric boiler according to claims I to 4 characterized in that the buffer tank is located in the upper part of said enclosure and in that one end of said buffer tank constitutes the "domestic hot water" outlet.