FR2478277A1 - Hot water convector heater - has auxiliary heater above spaced vertical plastics sheets incorporating staggered horizontal flow channels - Google Patents

Hot water convector heater - has auxiliary heater above spaced vertical plastics sheets incorporating staggered horizontal flow channels Download PDF

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Publication number
FR2478277A1
FR2478277A1 FR8005771A FR8005771A FR2478277A1 FR 2478277 A1 FR2478277 A1 FR 2478277A1 FR 8005771 A FR8005771 A FR 8005771A FR 8005771 A FR8005771 A FR 8005771A FR 2478277 A1 FR2478277 A1 FR 2478277A1
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FR
France
Prior art keywords
plates
chimney
convector
air
hot water
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.)
Granted
Application number
FR8005771A
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French (fr)
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FR2478277B1 (en
Inventor
Michel Berthet
Yves Laumond
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.)
Alcatel Lucent SAS
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Compagnie Generale dElectricite 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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Priority to FR8005771A priority Critical patent/FR2478277A1/en
Publication of FR2478277A1 publication Critical patent/FR2478277A1/en
Application granted granted Critical
Publication of FR2478277B1 publication Critical patent/FR2478277B1/fr
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0246—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid heat-exchange elements having several adjacent conduits forming a whole, e.g. blocks
    • 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
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/061—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material for domestic or space-heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
    • F28F21/063—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits for domestic or space-heating systems

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

The convection heater uses hot water as its main heat supply and has a casing (4) with a heating coil housed in its bottom half, and an auxiliary electric heater (12) above it. This is still positioned in the bottom half, and the heated air (16) is discharged through a grille over the top. The heating coil is incorporated in a set of vertical parallel plates (8) each with horizontal tubes (10) from end to end. Those in one plate are staggered in height against those in the adjacent plates. Their ends are connected to form a zig-zag path for each plate. They are made of extruded plastics containing an additional material having good heat inducting properties. Between the auxiliary heater and the heating coil is a curved heat shield (14).

Description

Convecteur eau-air à effet de cheminée, notamment pour le chauffage domestique
L'invention concerne un convecteur eau-air à effet de cheminée, notamment pour le chauffage domestique.Water-air convector with chimney effect, especially for domestic heating
The invention relates to a water-air convector with chimney effect, in particular for domestic heating.

On sait que les installations dite de "chauffage central" pour le chauffage des locaux comportent, dans chaque pièce, un échangeur de chaleur du type radiateur ou convecteur, le convecteur étant, par rapport au radiateur, caractérisé par le fait que la quasi totalité de la chaleur est évacuée vers le local par convection d'air. It is known that the so-called "central heating" installations for space heating include, in each room, a heat exchanger of the radiator or convector type, the convector being, relative to the radiator, characterized in that almost all of the heat is removed to the room by air convection.

I1 est connu de réaliser les convecteurs eau-air à l'aide de tôles d'acier constituant d'une part des conduites pour l'eau chaude d'autre part des ailettes qui sont échauffées par ces conduites par conduction thermique dans le métal et qui transmettent efficacement la chaleur à l'air grâce à leur grande surface de contact avec celui- ci. I1 est également connu que cette transmission de chaleur est rendue plus active grâce à la vitesse ascensionnelle de l'air échauffé au contact de ces ailettes, et que cette vitesse peut être augmentée par effet de cheminée, c'est-à-dire en canalisant l'air dans une cheminée verticale autour et au-dessus des ailettes. I1 is known to produce water-air convectors using steel sheets constituting on the one hand pipes for hot water on the other hand fins which are heated by these pipes by thermal conduction in the metal and which efficiently transmit heat to the air thanks to their large contact surface with it. It is also known that this heat transmission is made more active by virtue of the rising speed of the air heated up in contact with these fins, and that this speed can be increased by chimney effect, that is to say by channeling the air in a vertical chimney around and above the fins.

Ces convecteurs connus présentent l'inconvénient dsêtre relativement coûteux, car leur fabrication nécessite une forte dépense d'énergie, de nombreuses soudures, pliages, assemblages etc et de nécessiter un certain entretien (peinture) pour les protéger contre la rouille. These known convectors have the drawback of being relatively expensive, since their manufacture requires a high expenditure of energy, numerous welds, folding, assemblies, etc. and requiring certain maintenance (painting) to protect them against rust.

La présente invention a pour but la réalisation d'un convecteur eau-air à effet de cheminée, notamment pour le chauffage domestique d'un prix de revient abaissé, et ne nécessitant pas dVentretien particulier. The object of the present invention is to produce a water-air convector with a chimney effect, in particular for domestic heating at a lower cost price, and requiring no particular maintenance.

Elle a pour objet un convecteur eau-air à effet de cheminée, notamment pour le chauffage domestique comportant - des conduites d'eau chaude, - des surfaces d'échange thermique en contact thermique avec ces conduites - et une cheminée dont les parois sont disposées sensiblement vertical lement autour et au dessus de ces surfaces d'échange thermique pour canaliser et accélérer la circulation ascensionnelle de l'air échauffé au contact de ces surfaces, de manière à accélérer échange thermique entre ces surfaces et l'air circulant à leur contact, caractérisé par le fait que ces conduites et ces surfaces d'échange thermique sont constituées par des plaques à canaux internes, le matériau de ces plaques étant un haut polymère organique extrudable comportant une charge thermiquement conductrice. It relates to a water-air convector with a chimney effect, in particular for domestic heating comprising - hot water pipes, - heat exchange surfaces in thermal contact with these pipes - and a chimney whose walls are arranged substantially vertically vertically around and above these heat exchange surfaces to channel and accelerate the upward circulation of the heated air in contact with these surfaces, so as to accelerate heat exchange between these surfaces and the air circulating in contact with them, characterized in that these pipes and these heat exchange surfaces are constituted by plates with internal channels, the material of these plates being a high extrudable organic polymer comprising a thermally conductive filler.

Selon une disposition avantageuse les plaques à canaux internes présentent la forme de plaques verticales dont les canaux sont horizontaux et font saillies sur les deux faces de la plaque. La disposition utilisant des canaux permet d'avoir une vitesse de l'eau suffisante pour un bon échange thermique avec l'eau. Sa réalisation est assez facile. Le fait que les canaux sont horizontaux tend à provoquer un décollement de la couche limite à chaque passage de l'air ascendant au niveau d'un canal. According to an advantageous arrangement, the internal channel plates have the form of vertical plates, the channels of which are horizontal and protrude on the two faces of the plate. The arrangement using channels makes it possible to have a sufficient water speed for good heat exchange with the water. Its realization is quite easy. The fact that the channels are horizontal tends to cause the boundary layer to become detached each time the ascending air passes through a channel.

Selon une autre disposition avantageuse le convecteur comporte une résistance électrique de chauffage d'appoint disposée dans la cheminée au dessus des plaques. According to another advantageous arrangement, the convector comprises an electric heater for auxiliary heating arranged in the chimney above the plates.

Un écran thermique est alors disposé dans la cheminée entre cette résistance et ces plaques de manière à empêcher le chauffage radiatif de ces plaques par cette résistance, cet écran occupant moins de deux tiers de la section de la cheminée de manière à ne pas gêner sensiblement la circulation ascensionnelle de l'air. A heat shield is then placed in the chimney between this resistor and these plates so as to prevent the radiative heating of these plates by this resistor, this screen occupying less than two thirds of the section of the chimney so as not to substantially interfere with the upward air circulation.

A l'aide des figures schématiques ci-jointes, on va décrire ci-après, à titre non limitatif, comment l'invention peut être mise en oeuvre. I1 doit être compris que les éléments décrits et représentés peuvent, sans sortir du cadre de l'invention, être remplacés par d'autres éléments assurant les mêmes fonctions techniques. Lorsqu'un même élément est représenté sur plusieurs figures il y est désigné par le même signe de référence. Using the attached schematic figures, we will describe below, without limitation, how the invention can be implemented. It should be understood that the elements described and shown can, without departing from the scope of the invention, be replaced by other elements ensuring the same technical functions. When the same element is represented in several figures, it is designated therein by the same reference sign.

La figure 1 représente une vue d'un convecteur selon l'invention en coupe par un plan vertical transversal. FIG. 1 represents a view of a convector according to the invention in section through a transverse vertical plane.

La figure 2 représente une vue d'ensemble en perspective du convecteur de la figure 1. FIG. 2 represents an overall perspective view of the convector of FIG. 1.

La figure 3 représente une vue partielle agrandie de deux plaques du convecteur en coupe par un plan vertical transversal. FIG. 3 represents an enlarged partial view of two plates of the convector in section through a transverse vertical plane.

La figure 4 représente une vue en coupe d'une plaque d'un deuxième convecteur selon l'invention. Figure 4 shows a sectional view of a plate of a second convector according to the invention.

Le premier convecteur qui est représenté sur les figures 1, 2 et 3 comporte un bâti à parois verticales comportant quatre pieds 2, une cheminée à section rectangulaire de 15 cm de large et de 70cm de haut et un couvercle perforé 6. The first convector which is represented in FIGS. 1, 2 and 3 comprises a frame with vertical walls comprising four feet 2, a chimney with rectangular section 15 cm wide and 70 cm high and a perforated cover 6.

Dans la cheminée, au bas de celle-ci, sont disposées 16 plaques verticales 8 de 20cm de haut et de 1,6mm d'épaisseur, régulièrement réparties sur la largeur de la cheminée et comportant chacune huit canaux 10 horizontaux régulièrement répartis sur sa hauteur, les canaux des plaques voisines étant disposées en quinconce. Les canaux ont leur axe dans le plan vertical à mi épaisseur de la plaque. Ils ont un diamètre extérieur de 6mm et intérieur de 4, 4mm. Les canaux horizontaux se rejoignent de préférence deux à deux au sein même des plaques, pour former des U couchés à deux branches horizontales longues et un tronçon de raccordement vertical court. Cette disposition avec aller et retour permet d'obtenir une température moyenne de l'eau constante sur toute la longueur du convecteur. In the chimney, at the bottom of it, are arranged 16 vertical plates 8 of 20cm high and 1.6mm thick, regularly distributed over the width of the chimney and each comprising eight horizontal channels 10 regularly distributed over its height , the channels of the neighboring plates being staggered. The channels have their axis in the vertical plane at mid thickness of the plate. They have an outside diameter of 6mm and an inside diameter of 4.4mm. The horizontal channels preferably join two by two within the plates themselves, to form lying U with two long horizontal branches and a short vertical connection section. This arrangement with return flow makes it possible to obtain a constant average water temperature over the entire length of the convector.

Une résistance électrique de chauffage d'appoint 12 est disposée dans la cheminée 4 au dessus des plaques, et isolées de ces dernières par un écran thermique 14.An electrical auxiliary heating resistor 12 is placed in the chimney 4 above the plates, and isolated from the latter by a heat shield 14.

La circulation de l'air est représentée sur les figures 1 et 2 par les flèches 16. The air circulation is represented in FIGS. 1 and 2 by the arrows 16.

Un deuxième convecteur selon l'invention différe seulement du premier par la forme des plaques 20, qui sont constituées de deux parois planes parallèles 22 et 24 reliées par des cloisons internes 26 formant les canaux internes et permettant de contenir la pression de l'air. A second convector according to the invention differs only from the first by the shape of the plates 20, which consist of two parallel flat walls 22 and 24 connected by internal partitions 26 forming the internal channels and making it possible to contain the air pressure.

Le matériau de ces plaques peut être constitué d'un mélange de polyéthylène haute densité avec 40% en poids de polyéthylène chloré, ce dernier comportant 35% de chlore en poids avec 2 à 2,5% d'un agent antioxydant classique (mélange de polyphénols alcoylés et de thiodipropionates) et un agent de couplage classique (1S d'un titanate organique). La charge est constituée par 80% en poids d'un mélange de noir de carbone avec 10% de fibres de carbone de 1 à 3mm de long pour un diamètre de 8 micromètres.  The material of these plates may consist of a mixture of high density polyethylene with 40% by weight of chlorinated polyethylene, the latter comprising 35% of chlorine by weight with 2 to 2.5% of a conventional antioxidant agent (mixture of alkylated polyphenols and thiodipropionates) and a conventional coupling agent (1S of an organic titanate). The filler consists of 80% by weight of a mixture of carbon black with 10% of carbon fibers from 1 to 3mm long for a diameter of 8 micrometers.

Ces plaques selon le premier mode de réalisation peuvent être fabriquées par le processus suivant
On réalise par extrusion des plaques planes de 0,8mm d'épaisseur et on colle ces plaques deux par deux par simple pression à chaud dans une matrice en maintenant une pression d'air entre les deux plaques. La matrice comporte des empreintes en creux sur ses deux faces pour assurer la formation des canaux 10 et des connexions d'extrémité sous l'action de la pression d'air entre les plaques. Ce procédé est connu sous le nom de thermoformage. These plates according to the first embodiment can be produced by the following process
Flat plates 0.8mm thick are produced by extrusion and these plates are glued two by two by simple hot pressure in a matrix while maintaining an air pressure between the two plates. The matrix has recesses on its two faces to ensure the formation of channels 10 and end connections under the action of air pressure between the plates. This process is known as thermoforming.

Claims (4)

REVENDICATIONS 1/ Convecteur eau-air à effet de cheminée, notamment pour le chauffage domestique, comportant - des conduites d'eau chaude (10), - des surfaces d'échange thermique (83 en contact thermique avec ces conduites - et une cheminée (4) dont les parois sont disposées sensiblement verticalement autour et au-dessus de ces surfaces d'échange thermique pour canaliser et accélerer la circulation ascensionnelle de l'air échauffé au contact de ces surfaces, de manière à augmenter l'échange thermique entre ces surfaces et l'air circulant à leur contact, caractérisé par le fait que ces conduites et ces surfaces d'échange thermique sont constituées par des plaques (8) à canaux internes (10) le matériau de ces plaques étant un haut polymère organique extrudable comportant une charge thermiquement conductrice.1 / Chimney-effect water-air convector, in particular for domestic heating, comprising - hot water pipes (10), - heat exchange surfaces (83 in thermal contact with these pipes - and a chimney (4 ) whose walls are arranged substantially vertically around and above these heat exchange surfaces to channel and accelerate the upward circulation of the heated air in contact with these surfaces, so as to increase the heat exchange between these surfaces and the air flowing in contact with them, characterized in that these pipes and these heat exchange surfaces consist of plates (8) with internal channels (10) the material of these plates being a high extrudable organic polymer comprising a filler thermally conductive. 2/ Convecteur selon la revendication 1, caractérisé par le fait que lesdites plaques à canaux internes présentent la forme de plaques verticales (8) dont les canaux (10) sont horizontaux et font saillies sur les deux faces de la plaque.2 / Convector according to claim 1, characterized in that said internal channel plates have the form of vertical plates (8) whose channels (10) are horizontal and protrude on both sides of the plate. 3/ Convecteur selon la revendication 2, caractérisé par le fait que les canaux horizontaux sont réunis deux à deux par un tronçon de raccordement vertical à une extrémité de chaque plaque, de maniere à former un circuit en forme de U couché.3 / Convector according to claim 2, characterized in that the horizontal channels are joined two by two by a vertical connection section at one end of each plate, so as to form a circuit in the form of a coated U. 4/ Convecteur selon la revendication 1, caractérisé par le fait qu'il comporte une résistance électrique de chauffage d'appoint (12) disposée au dessus desdites plaques (8), - un écran thermique (14) étant disposée dans la cheminée entre cette résistance et ces plaques de manière à empêcher le chauffage radiatif de ces plaques par cette résistance, cet écran occupant moins des deux tiers de la section de la cheminée de manière à ne pas gêner sensiblement la circulation ascensionnelle de l'air. 4 / Convector according to claim 1, characterized in that it comprises an electrical auxiliary heating resistance (12) disposed above said plates (8), - a heat shield (14) being disposed in the chimney between this resistance and these plates so as to prevent the radiative heating of these plates by this resistance, this screen occupying less than two thirds of the section of the chimney so as not to substantially interfere with the upward circulation of air.
FR8005771A 1980-03-14 1980-03-14 Hot water convector heater - has auxiliary heater above spaced vertical plastics sheets incorporating staggered horizontal flow channels Granted FR2478277A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8005771A FR2478277A1 (en) 1980-03-14 1980-03-14 Hot water convector heater - has auxiliary heater above spaced vertical plastics sheets incorporating staggered horizontal flow channels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8005771A FR2478277A1 (en) 1980-03-14 1980-03-14 Hot water convector heater - has auxiliary heater above spaced vertical plastics sheets incorporating staggered horizontal flow channels

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FR2478277A1 true FR2478277A1 (en) 1981-09-18
FR2478277B1 FR2478277B1 (en) 1985-05-10

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529309A1 (en) * 1982-06-24 1983-12-30 Comp Generale Electricite WATER-AIR CONVECTOR WITH CHIMNEY EFFECT TO HEAT A LOCAL
US4544023A (en) * 1983-09-16 1985-10-01 Marciniak Walter J Air heating and cooling apparatus
EP0826527A2 (en) * 1996-09-03 1998-03-04 AURORA Konrad G. Schulz GmbH & Co Convector
US6289175B1 (en) * 1999-02-17 2001-09-11 De'longhi S.P.A. Independently operating portable radiator
GB2411462A (en) * 2004-02-25 2005-08-31 Basic Holdings Free standing electric room heater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1524182A (en) * 1967-02-24 1968-05-10 Rubanox Soc Improvements to finned heat exchangers
FR2275746A1 (en) * 1974-06-20 1976-01-16 Hoechst Ag MULTI-LAYER PLASTIC RADIATOR OF PANELS AND PROCESS FOR ITS MANUFACTURING
CH573577A5 (en) * 1973-10-03 1976-03-15 Exro Ag Additional heater and humidifier for radiators - extends central heating for special rooms in hospitals, schools etc.
FR2284094A1 (en) * 1974-09-09 1976-04-02 Sfdt Room convector heater - has main and auxiliary supplied from separate sources of energy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1524182A (en) * 1967-02-24 1968-05-10 Rubanox Soc Improvements to finned heat exchangers
CH573577A5 (en) * 1973-10-03 1976-03-15 Exro Ag Additional heater and humidifier for radiators - extends central heating for special rooms in hospitals, schools etc.
FR2275746A1 (en) * 1974-06-20 1976-01-16 Hoechst Ag MULTI-LAYER PLASTIC RADIATOR OF PANELS AND PROCESS FOR ITS MANUFACTURING
FR2284094A1 (en) * 1974-09-09 1976-04-02 Sfdt Room convector heater - has main and auxiliary supplied from separate sources of energy

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529309A1 (en) * 1982-06-24 1983-12-30 Comp Generale Electricite WATER-AIR CONVECTOR WITH CHIMNEY EFFECT TO HEAT A LOCAL
EP0097905A2 (en) * 1982-06-24 1984-01-11 COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite: Water-air convector with chimney effect for space-heating, and method of producing such a convector
EP0097905A3 (en) * 1982-06-24 1984-10-24 COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite: Water-air convector with chimney effect for space-heating, and method of producing such a convector
US4544023A (en) * 1983-09-16 1985-10-01 Marciniak Walter J Air heating and cooling apparatus
EP0826527A2 (en) * 1996-09-03 1998-03-04 AURORA Konrad G. Schulz GmbH & Co Convector
EP0826527A3 (en) * 1996-09-03 2001-04-04 AURORA Konrad G. Schulz GmbH & Co Convector
US6289175B1 (en) * 1999-02-17 2001-09-11 De'longhi S.P.A. Independently operating portable radiator
AU766875B2 (en) * 1999-02-17 2003-10-23 De'longhi S.P.A. Independently operating mobile radiator
GB2411462A (en) * 2004-02-25 2005-08-31 Basic Holdings Free standing electric room heater
GB2411462B (en) * 2004-02-25 2008-10-08 Basic Holdings Heating devices

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Publication number Publication date
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