EP0006846B1 - Storage heater - Google Patents

Storage heater Download PDF

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Publication number
EP0006846B1
EP0006846B1 EP19780200109 EP78200109A EP0006846B1 EP 0006846 B1 EP0006846 B1 EP 0006846B1 EP 19780200109 EP19780200109 EP 19780200109 EP 78200109 A EP78200109 A EP 78200109A EP 0006846 B1 EP0006846 B1 EP 0006846B1
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EP
European Patent Office
Prior art keywords
core
channel
fan
cold air
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19780200109
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German (de)
French (fr)
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EP0006846A1 (en
Inventor
Raymond Geerinck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ateliers de Constructions Electriques de Charleroi SA filed Critical Ateliers de Constructions Electriques de Charleroi SA
Priority to EP19780200109 priority Critical patent/EP0006846B1/en
Priority to DE7878200109T priority patent/DE2860936D1/en
Publication of EP0006846A1 publication Critical patent/EP0006846A1/en
Application granted granted Critical
Publication of EP0006846B1 publication Critical patent/EP0006846B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
    • F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
    • F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
    • F24H7/0408—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
    • F24H7/0416—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer fluid being air

Definitions

  • a heat storage stove comprising in the heat storage core, a channel passing through the core, a transverse current fan whose suction space is arranged at the outlet of this channel and the ejection opening of which is directed towards the room to be heated, a cold air intake opening in an enclosure of the storage stove which communicates with the inlet of the channel passing through the core and a bypass passage outside the core between the inlet and outlet of the channel passing through the core.
  • the bypass passage can be of variable section, adjustable by a movable valve, actuated by an element sensitive to the temperature of the mixture of cold and hot air or to the temperature of the hot air only leaving the core channel.
  • the object of the invention is to provide a heat storage stove in which the above aims are achieved in a simple and efficient manner. It is characterized in that the fan ejection opening communicates with its suction space through a row of holes or a slot of size chosen to keep the noise level of the fan low and in that in the bypass passage , downstream of the movable valve, between the inlet and outlet openings of the core channel, is arranged an element slowing down the flow of cold air in this passage, constituted by a grid. Such a braking element above all makes it possible to equalize the temperature in the air stream ejected by the fan.
  • Figure 1 of the drawing is a schematic sectional view of a stove according to the invention.
  • Figure 2 is a view of an element slowing the flow of cold air in the bypass passage.
  • a heat storage stove essentially comprises a control assembly with ventilation and a heat storage core 1 made of refractory bricks heated by means of electrical resistors, not shown.
  • the core 1 is surrounded by a heat-insulating layer 2 and the whole of a sheet metal covering 3.
  • a cold air intake opening 4 and a filled hot air outlet opening a grid 5 are provided in the sheet metal covering 3.
  • the cold air is brought from the opening 4 towards the inlet of a channel 6 in the core 1.
  • a fan 7 At the outlet of the channel 6 is arranged a fan 7 with transverse current of which a suction space 8 communicates with the outlet of the channel 6.
  • a bypass passage 9 is formed outside the core 1 between the inlet and the outlet of the channel 6.
  • this passage 9 is arranged an element slowing the flow of cold air, in this case a sheet 10 pierced with numerous openings 11 which together form a grid.
  • the sheet 10 delimits one of the sides of the suction space 8 of the fan 7, between an edge 12 of the outlet opening of the channel 6 of the core 1 and an edge 13 of the suction opening of the fan 7.
  • the sheet 10 can obviously be replaced by a grid of another shape, for example made of expanded metal or crossed wires.
  • the other side of the suction space 8 of the tangential fan 7 is defined by a guide plate 14 which extends from an edge 15 of the suction opening of the fan 7 towards an edge 16 of the outlet. of the channel 6 of the accumulator core 1, but which leaves an open slot 17 at the edge 16, through which the space 8 communicates with the ejection opening 18 of the fan 7.
  • the replacement of the cold air intake slot by a perforated sheet 10 has the effect of maintaining the speed of emptying of the calories accumulated in the core 1 and of equalizing the temperature of the air leaving the fan 7, such so that the difference between the average air temperature and its maximum temperature decreases dramatically, so much so that for example for the same amount of heat extracted per unit of time the maximum temperature of the ejected air falls by 135 ° C to 110 ° C.
  • the existence of the slot 17 is partly responsible for the result achieved. Indeed, if we close this slot 17, not only the silent operation of the device is compromised but the equalization of the temperature also loses significantly in efficiency.
  • the slot 17 can be replaced by a row of holes.
  • valve 19 Upstream of the element 10 slowing down the flow of cold air in the passage 9 is disposed a valve 19.
  • the valve 19 is actuated by an appropriate heat-sensitive element 20, symbolized by a broken line, arranged in the suction space 8 of fan 7.

Description

Dans les brevets belges No. 714 537 et 748 432, on a décrit un poêle à accumulation de chaleur, comprenant au noyau accumulateur de chaleur, un canal traversant le noyau, un ventilateur à courant transversal dont l'espace d'aspiration est agencé à la sortie de ce canal et dont l'ouverture d'éjection est dirigée vers le local à chauffer, une ouverture d'admission d'air froid dans une enceinte du poêle à accumulation qui communique avec l'entrée du canal traversant le noyau et un passage de dérivation à l'extérieur du noyau entre l'entrée et la sortie du canal traversant le noyau.In Belgian patents Nos. 714 537 and 748 432, a heat storage stove has been described, comprising in the heat storage core, a channel passing through the core, a transverse current fan whose suction space is arranged at the outlet of this channel and the ejection opening of which is directed towards the room to be heated, a cold air intake opening in an enclosure of the storage stove which communicates with the inlet of the channel passing through the core and a bypass passage outside the core between the inlet and outlet of the channel passing through the core.

Le passage de dérivation peut être de section variable, réglable par un clapet mobile, actionné par un élément sensible à la température du mélange d'air froid et chaud ou à la température de l'air chaud seulement sortant du canal du noyau.The bypass passage can be of variable section, adjustable by a movable valve, actuated by an element sensitive to the temperature of the mixture of cold and hot air or to the temperature of the hot air only leaving the core channel.

Comme ces poêles à accumulation de chaleur sont à installer dans des pièces d'habitation, il est nécessaire qu'ils présentent certaines qualités, entre autres le fait que la température de l'air éjecté est maintenue en tout point en dessous d'une température maximum déterminée. Une autre qualité importante est un niveau de bruit très bas tout en fonctionnant à une vitesse de ventilateur suffisante pour assurer une évacuation complète de la chaleur accumulée pendant les périodes de charge. Ces limites à ne pas dépasser peuvent être, par exemple 120°C pour la température et 35 dB pour le bruit.As these heat storage stoves are to be installed in living rooms, it is necessary that they have certain qualities, including the fact that the temperature of the exhaust air is kept at all points below a temperature maximum determined. Another important quality is a very low noise level while operating at a fan speed sufficient to ensure complete removal of the heat accumulated during charging periods. These limits not to be exceeded can be, for example 120 ° C for the temperature and 35 dB for the noise.

L'invention a pour but un poêle à accumulation de chaleur dans lequel les buts ci- dessus sont réalisés de manière simple et efficace. Elle est caractérisée en ce que l'ouverture d'éjection du ventilateur communique avec son espace d'aspiration par une rangée de trous ou une fente de taille choisie pour maintenir faible le niveau du bruit du ventilateur et en ce que dans le passage de dérivation, en aval du clapet mobile, entre les ouvertures d'entrée et de sortie du canal du noyau, est disposé un élément freinant l'écoulement de l'air froid dans ce passage, constitué par une grille. Un tel élément freinant permet surtout d'égaliser la température dans le courant d'air éjecté par le ventilateur.The object of the invention is to provide a heat storage stove in which the above aims are achieved in a simple and efficient manner. It is characterized in that the fan ejection opening communicates with its suction space through a row of holes or a slot of size chosen to keep the noise level of the fan low and in that in the bypass passage , downstream of the movable valve, between the inlet and outlet openings of the core channel, is arranged an element slowing down the flow of cold air in this passage, constituted by a grid. Such a braking element above all makes it possible to equalize the temperature in the air stream ejected by the fan.

L'invention est expliquée ci-dessous par rapport à un exemple d'une forme d'exécution en se référant au dessin annexé. La figure 1 du dessin est une vue en coupe schématique d'un poêle suivant l'invention. La figure 2 est une vue d'un élément freinant l'écoulement d'air froid dans le passage de dérivation.The invention is explained below with respect to an example of an embodiment with reference to the accompanying drawing. Figure 1 of the drawing is a schematic sectional view of a stove according to the invention. Figure 2 is a view of an element slowing the flow of cold air in the bypass passage.

A la figure 1, un poêle à accumulation de chaleur comprend essentiellement un ensemble de commande avec ventilation et un noyau accumulateur de chaleur 1 en briques réfractaires chauffé au moyen de résistances électriques, non représentées. Le noyau 1 est entouré d'une couche calorifuge 2 et le tout d'un habillage en tôle 3. Dans l'habillage en tôle 3, une ouverture d'admission d'air froid 4 et une ouverture de sortie d'air chaud garnie d'une grille 5 sont prévues. L'air froid est amené de l'ouverture 4 vers l'entrée d'un canal 6 dans le noyau 1. A la sortie du canal 6 est disposé un ventilateur 7 à courant transversal dont un espace d'aspiration 8 communique avec la sortie du canal 6. Un passage de dérivation 9 est ménagé en dehors du noyau 1 entre l'entrée et la sortie du canal 6. Dans ce passage 9 est disposé un élément freinant le flux d'air froid, en l'occurrence une tôle 10 percée de nombreuses ouvertures 11 qui ensemble forment une grille. La tôle 10 délimite un des côtés de l'espace d'aspiration 8 du ventilateur 7, entre un bord 12 de l'ouverture de sortie du canal 6 du noyau 1 et un bord 13 de l'ouverture d'aspiration du ventilateur 7. La tôle 10 peut évidemment être remplacée par une grille d'une autre forme, par exemple en métal déployé ou en fils de fer croisés.In FIG. 1, a heat storage stove essentially comprises a control assembly with ventilation and a heat storage core 1 made of refractory bricks heated by means of electrical resistors, not shown. The core 1 is surrounded by a heat-insulating layer 2 and the whole of a sheet metal covering 3. In the sheet metal covering 3, a cold air intake opening 4 and a filled hot air outlet opening a grid 5 are provided. The cold air is brought from the opening 4 towards the inlet of a channel 6 in the core 1. At the outlet of the channel 6 is arranged a fan 7 with transverse current of which a suction space 8 communicates with the outlet of the channel 6. A bypass passage 9 is formed outside the core 1 between the inlet and the outlet of the channel 6. In this passage 9 is arranged an element slowing the flow of cold air, in this case a sheet 10 pierced with numerous openings 11 which together form a grid. The sheet 10 delimits one of the sides of the suction space 8 of the fan 7, between an edge 12 of the outlet opening of the channel 6 of the core 1 and an edge 13 of the suction opening of the fan 7. The sheet 10 can obviously be replaced by a grid of another shape, for example made of expanded metal or crossed wires.

L'autre côté de l'espace d'aspiration 8 du ventilateur tangentiel 7 est défini par une tôle de guidage 14 qui s'étend d'un bord 15 de l'ouverture d'aspiration du ventilateur 7 vers un bord 16 de la sortie du canal 6 du noyau accumulateur 1, mais qui laisse subsister, à l'endroit du bord 16, une fente ouverte 17, par laquelle l'espace 8 communique avec l'ouverture d'éjection 18 du ventilateur 7.The other side of the suction space 8 of the tangential fan 7 is defined by a guide plate 14 which extends from an edge 15 of the suction opening of the fan 7 towards an edge 16 of the outlet. of the channel 6 of the accumulator core 1, but which leaves an open slot 17 at the edge 16, through which the space 8 communicates with the ejection opening 18 of the fan 7.

L'effet de l'élément freinant l'écoulement d'air dans le passage 9, donc de la tôle trouée 10, est assez spectaculaire et s'explique difficilement. Si la tôle 10 est supprimée et si donc l'air froid a accès à l'ouverture d'entrée du ventilateur 7 à travers une fente, comme cela était bien connu auparavant, la répartition de la température est assez inégale dans l'air éjecté par le ventilateur 7 et présente un maximum très élevé à côté d'endroits à température relativement modérée, tandis que la rapidité de vidange des calories accumulées dans le noyau est assez bonne.The effect of the element slowing the air flow in the passage 9, therefore of the perforated sheet 10, is quite spectacular and is difficult to explain. If the sheet 10 is removed and therefore the cold air has access to the inlet opening of the fan 7 through a slot, as was well known before, the distribution of the temperature is quite uneven in the ejected air by the fan 7 and has a very high maximum near places with a relatively moderate temperature, while the speed of emptying of the calories accumulated in the core is quite good.

Le remplacement de la fente d'admission d'air froid par une tôle trouée 10 a pour effet de maintenir la rapidité de vidange des calories accumulées dans le noyau 1 et d'égaliser la température de l'air sortant du ventilateur 7, de telle manière que l'écart entre la température moyenne de l'air et sa température maximum diminue de manière spectaculaire, à tel point que par exemple pour une même quantité de chaleur extraite par unité de temps la température maximum de l'air éjecté tombe de 135°C à 110°C. Bien qu'il soit difficile de donner une explication sûre de ce phénomène, il semble bien que l'existence de la fente 17 soit en partie responsable du résultat atteint. En effet, si on bouche cette fente 17, non seulement le fonctionnement silencieux de l'appareil est compromis mais l'égalisation de la température aussi perd sensiblement en efficacité. La fente 17 peut être remplacée par une rangée de trous.The replacement of the cold air intake slot by a perforated sheet 10 has the effect of maintaining the speed of emptying of the calories accumulated in the core 1 and of equalizing the temperature of the air leaving the fan 7, such so that the difference between the average air temperature and its maximum temperature decreases dramatically, so much so that for example for the same amount of heat extracted per unit of time the maximum temperature of the ejected air falls by 135 ° C to 110 ° C. Although it is difficult to give a reliable explanation of this phenomenon, it seems that the existence of the slot 17 is partly responsible for the result achieved. Indeed, if we close this slot 17, not only the silent operation of the device is compromised but the equalization of the temperature also loses significantly in efficiency. The slot 17 can be replaced by a row of holes.

En amont de l'élément 10 freinant le flux d'air froid dans le passage 9 est disposé un clapet 19. Le clapet 19 est actionné par un élément thermosensible 20 approprié, symbolisé par une ligne brisée, disposé dans l'espace d'aspiration 8 du ventilateur 7.Upstream of the element 10 slowing down the flow of cold air in the passage 9 is disposed a valve 19. The valve 19 is actuated by an appropriate heat-sensitive element 20, symbolized by a broken line, arranged in the suction space 8 of fan 7.

Claims (2)

1. Heat storage stove, comprising a heat storage core (1), a channel (6) passing through the core (1), a transverse-flow fan (7), the suction space (8) of which is provided at the outlet of this channel (6) and the ejection opening (18) of which is directed towards the room to be heated, an opening (4) for the intake of cold air into an enclosure (3) of the storage stove, which intake opening communicates with the inlet of the channel (6) passing through the core (1), and a branch passage (9) which has a cross-section of passage adjustable by means of a movable flap valve (19) and which is located on the outside of the core (1) between the inlet and the outlet of the channel (6) passing through the core (1), characterised in that the ejection opening (18) of the fan (7) communicates with its suction space (8) by means of a row of holes or a slit (17) of a size selected to keep the noise of the fan (7) at a low level, and in that there is located in the branch passage (9), downstream of the movable flap valve (19), an element (11) which retards the flow of cold air in this passage (9) and which is constituted by a grille.
2. Storage stove according to Claim 1, characterised in that the movable flap valve (19) which distributes the cold air between the channel (6) and the branch passage (9) is actuated by a heat-sensitive element (20) located in the suction space (8) of the fan (7).
EP19780200109 1978-07-18 1978-07-18 Storage heater Expired EP0006846B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19780200109 EP0006846B1 (en) 1978-07-18 1978-07-18 Storage heater
DE7878200109T DE2860936D1 (en) 1978-07-18 1978-07-18 Storage heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19780200109 EP0006846B1 (en) 1978-07-18 1978-07-18 Storage heater

Publications (2)

Publication Number Publication Date
EP0006846A1 EP0006846A1 (en) 1980-01-23
EP0006846B1 true EP0006846B1 (en) 1981-08-12

Family

ID=8185959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780200109 Expired EP0006846B1 (en) 1978-07-18 1978-07-18 Storage heater

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EP (1) EP0006846B1 (en)
DE (1) DE2860936D1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE665260A (en) * 1965-06-11 1965-12-13 Acec Hot air distribution unit for forced circulation storage stoves
BE710201A (en) * 1968-02-01 1968-08-01 Acec FORCED CIRCULATION ACCUMULATION STOVES
CA851296A (en) * 1968-05-02 1970-09-08 Geerinck Raymond Poele electrique a accumulation de chaleur
FR2027191A1 (en) * 1968-12-27 1970-09-25 Malag Werke Adolf Mucken

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Publication number Publication date
EP0006846A1 (en) 1980-01-23
DE2860936D1 (en) 1981-11-12

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