WO2010100363A1 - Heating element for continuous hot water production - Google Patents

Heating element for continuous hot water production Download PDF

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Publication number
WO2010100363A1
WO2010100363A1 PCT/FR2010/050305 FR2010050305W WO2010100363A1 WO 2010100363 A1 WO2010100363 A1 WO 2010100363A1 FR 2010050305 W FR2010050305 W FR 2010050305W WO 2010100363 A1 WO2010100363 A1 WO 2010100363A1
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WO
WIPO (PCT)
Prior art keywords
heating element
sensor
water
hot water
temperature
Prior art date
Application number
PCT/FR2010/050305
Other languages
French (fr)
Inventor
Lionnel Durand
Romain Turpin
Pascal Meyer
Original Assignee
Seb 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.)
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Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41435237&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010100363(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Seb Sa filed Critical Seb Sa
Priority to CN201080010214.7A priority Critical patent/CN102341659B/en
Priority to EP10710375A priority patent/EP2404122A1/en
Publication of WO2010100363A1 publication Critical patent/WO2010100363A1/en

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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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/162—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using electrical energy supply
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/25—Temperature of the heat-generating means in the heater
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters

Definitions

  • the invention relates to a heating element for continuous hot water production, as well as to a continuous hot water production device comprising such an element.
  • heating element of the type comprising a water circulation pipe, an electric heating device disposed along a central heating portion of the circulation pipe, and a temperature sensor adapted to allow the regulation of the temperature of the water leaving the heating element.
  • the sensor is disposed at the outer surface of the central heating portion, close to the electric heating device, and regulates the flow of water in the pipe (and therefore the heating time of water) in order to obtain a constant temperature at the outlet of the pipe.
  • the temperature of the outlet water is dependent on the tolerances related to the geometrical dimensions of the heating portion, the pump, the electric heating device and the supply voltage.
  • the temperature sensor can measure a temperature very different from one heating element to another, which creates a dispersion in the temperature measurements at the outlet of the circulation pipe of plus or minus 6 ° C compared to at the average value.
  • the invention aims to provide a heating element whose temperature range of hot water leaving the circulation pipe is finer.
  • the senor in the heating element of the aforementioned type, is disposed in contact with the water in circulation, in the wall defining the downstream portion of hot water outlet of the circulation pipe which is downstream of the central heating portion.
  • the measured temperature is that of the water (since the sensor is in contact with it), and on the other hand, this measured temperature takes into account the variations in the transmission of energy. with water (since the sensor is downstream of the electric heating device). Thus, it is possible to regulate much more finely the temperature of the water at the outlet of the heating element.
  • FIG. 1 is a partial view of a hot water production device comprising a heating element according to a first embodiment of the present invention
  • FIG. 2 is a perspective view of the heating element of the first embodiment of the present invention
  • FIG. 3 is an exploded perspective view of the zone of the heating element receiving the temperature sensor, taken from FIG. 2;
  • FIG. 4 is a view similar to FIG. 2, corresponding to a second embodiment; , and
  • Figure 5 is a view similar to Figure 3 corresponding to the second embodiment.
  • a hot water production device 1 for producing hot water continuously, on demand comprises a cold water tank (removably mounted), a heating element 2 making it possible to produce hot water.
  • hot water at high temperature at least 70 0 C, preferably about 100 0 C
  • a pump for circulating the water in the heating element 2 comprises a pipe of water circulation 3 which is located downstream of the pump, and an electric heating device 4 adapted to heat the water flowing in the pipe 3.
  • the pipe 3 is formed by an upstream portion 5 of cold water inlet, a central heating portion 6 and a downstream portion 7 of hot water outlet. More specifically, the upstream portion 5 extends from the pump to the central portion 6, and the downstream portion 7 extends from the central portion 6 to the water outlet 8 of the device
  • the central portion 6 is defined as being the portion along which extends the electric heating device 4 which, here, is formed by a resistive track screen printed on the outer surface of this portion 6.
  • the heating element 2 comprises a boiler 9 and a hot water dispensing nozzle 10.
  • the boiler 9 is disposed in the housing of the hot water production device 1 and it comprises the upstream portion 5, the central portion 6 and the electric heating device 4.
  • the dispensing nozzle 10, for its part, is formed by the downstream portion 7 and distributes the hot water in a container 18 such as a cup.
  • the central portion 6 is of annular geometry. Thus, it is delimited radially by two tubes (here, coaxial), the water having a general flow which is parallel to the axis of the two tubes.
  • the outer tube 11 which is metallic, carries on its external surface the electric heating device 4.
  • the circuit of the water between the two tubes is a helical circuit around the axis of these.
  • the progression step is axial and is defined by a radial inner wall itself helical.
  • the helical inner wall of plastic material is carried by the inner tube which is also made of plastic.
  • the very low inertia of the outer metal tube 11 as well as the plastic structure makes it possible to obtain a very rapid heating of the central portion 6 and the water.
  • the hot water production device (more precisely, the heating element) comprises a temperature sensor which is adapted to allow the regulation of the temperature of the water at the outlet of the heating element (in the present case). for example, there are two temperature sensors).
  • each temperature sensor 13, 14 has a negative temperature coefficient (CTN type sensor).
  • the hot water production device 1 comprises a regulation module (electronic module).
  • the regulation module makes it possible to vary the flow rate of the pump as a function of the temperature measured by the sensors 13, 14 (the power of the electric heating device 4 remaining constant).
  • a first sensor 13 is fixed (here, welded) to the surface of the central portion 6 carrying the electric heating element (here, the outer surface of the outer tube 11).
  • This first sensor 13, adjacent to the electric heating element 4, is connected to the control module so as to allow the main regulation of the water temperature: the pumping speed varies according to the temperature measured by the first sensor 13 in order to obtain a constant temperature at the outlet of the heating element 2 .
  • a second sensor 14 is disposed in a wall delimiting the downstream portion 7 so as to be in contact with the water.
  • the second sensor 14 is disposed near the upstream end of the downstream portion 7.
  • this sensor 14 comprises a wafer 16 made of a thermally conductive material (here, ceramic) and an element 17 to negative temperature coefficient fixed to the wafer 16.
  • the wafer 16 is sealed to a half-cylinder 15 and, with it, the wall of the downstream portion 7 (see FIG. 3).
  • the wafer 16 is sealingly attached at a bend 20 (here, the angle of the bend 20 is 90 ° and the wafer 16 is fixed to form the outer bisector thereof. elbow 20).
  • the heat exchanges are better and make it possible to have a more precise temperature and a shorter response time.
  • the second sensor 14 is flush with this wall (the wafer 16 forms the inner surface of the wall), the temperature measurement is not disturbed by the dynamic of water in motion, nor by the presence of vapor bubbles contrary to what would happen if it were fixed in a dipping way in the flow.
  • the arrangement of the second sensor 14 at a bend (more precisely, at the outer bisector of the bend) in the second embodiment makes it possible to have even better temperature measurements.
  • the second sensor 14 is connected to the regulation module so as to enable the measurement taken by the first sensor 13 to be corrected. It thus makes it possible to measure the dispersion of elements such as the pump, the heating portion 6, the electrical element 4 heating and supply voltage and correct the resulting error. It thus allows a fine regulation of the water temperature at the outlet of the heating device 1.
  • the invention is not limited to the present embodiment.
  • the second sensor 14 it would thus be possible for the second sensor 14 to be disposed elsewhere in the downstream portion, in particular at the water outlet orifice 8 of the dispensing nozzle 10. In this case, the second sensor 14 also makes it possible to take into account the temperature variations due to the displacement of the water along the downstream portion 7, as well as those related to the material of the container 18 receiving the water.
  • the sensor may be wireless, or be positioned at the top of the nozzle and comprise a heat conducting part coming into contact with the water.
  • the second sensor 14 located in the downstream portion
  • the first sensor 13 that arranged in the heating portion
  • the wafer 16 of the second sensor 14 could be exposed to a thermally conductive material other than a ceramic, for example metal.

Abstract

The invention relates to a heating element (2) for continuous water production, that comprises an electric heating device (4), a water circulation duct (3) with a central portion (6) along which the electric heating device (4) is arranged and a downstream portion (7) for hot water outlet, and a temperature sensor (14) adapted for adjusting the water temperature at the outlet of the heating element (2). According to the invention, the sensor (14) is provided in a wall defining the downstream portion (7) so as to be in contact with the circulating water.

Description

ELEMENT CHAUFFANT POUR LA PRODUCTION D'EAU CHAUDE EN CONTINU HEATING ELEMENT FOR CONTINUOUS HOT WATER PRODUCTION
L'invention concerne un élément chauffant pour la production d'eau chaude en continu, ainsi qu'un dispositif de production d'eau chaude en continu comprenant un tel élément .The invention relates to a heating element for continuous hot water production, as well as to a continuous hot water production device comprising such an element.
On connaît un tel élément chauffant du type comportant une conduite de circulation d'eau, un dispositif électrique de chauffe disposé le long d'une portion centrale de chauffe de la conduite de circulation, et un capteur de température adapté à permettre la régulation de la température de l'eau en sortie de l'élément chauffant.There is known such a heating element of the type comprising a water circulation pipe, an electric heating device disposed along a central heating portion of the circulation pipe, and a temperature sensor adapted to allow the regulation of the temperature of the water leaving the heating element.
Dans un tel élément chauffant, le capteur est disposé à la surface extérieure de la portion centrale de chauffe, à proximité du dispositif électrique de chauffe, et permet de réguler le débit de l'eau dans la conduite (et donc le temps de chauffe de l'eau) afin d'obtenir une température constante en sortie de la conduite. Cependant la température de l'eau en sortie est dépendante des tolérances liées aux dimensions géométriques de la portion de chauffe, à la pompe, au dispositif électrique de chauffe et à la tension d'alimentation. De ce fait, le capteur de température peut mesurer une température très différente d'un élément chauffant à l'autre, ce qui crée une dispersion dans les mesures de température en sortie de la conduite de circulation de plus ou moins 6°C par rapport à la valeur moyenne.In such a heating element, the sensor is disposed at the outer surface of the central heating portion, close to the electric heating device, and regulates the flow of water in the pipe (and therefore the heating time of water) in order to obtain a constant temperature at the outlet of the pipe. However, the temperature of the outlet water is dependent on the tolerances related to the geometrical dimensions of the heating portion, the pump, the electric heating device and the supply voltage. As a result, the temperature sensor can measure a temperature very different from one heating element to another, which creates a dispersion in the temperature measurements at the outlet of the circulation pipe of plus or minus 6 ° C compared to at the average value.
L'invention vise à fournir un élément chauffant dont la plage de températures de l'eau chaude en sortie de la conduite de circulation est plus fine.The invention aims to provide a heating element whose temperature range of hot water leaving the circulation pipe is finer.
Selon l'invention, dans l'élément chauffant du type précité, le capteur est disposé en contact avec l'eau en circulation, dans la paroi délimitant la portion aval de sortie d'eau chaude de la conduite de circulation qui est en aval de la portion centrale de chauffe.According to the invention, in the heating element of the aforementioned type, the sensor is disposed in contact with the water in circulation, in the wall defining the downstream portion of hot water outlet of the circulation pipe which is downstream of the central heating portion.
De ce fait, d'une part la température mesurée est celle de l'eau (vu que le capteur est en contact avec celle-ci), et d'autre part, cette température mesurée tient compte des variations dans la transmission d'énergie à l'eau (vu que le capteur est en aval du dispositif électrique de chauffe) . Ainsi, il est possible de réguler de façon beaucoup plus fine la température de l'eau en sortie de l'élément chauffant.Therefore, on the one hand, the measured temperature is that of the water (since the sensor is in contact with it), and on the other hand, this measured temperature takes into account the variations in the transmission of energy. with water (since the sensor is downstream of the electric heating device). Thus, it is possible to regulate much more finely the temperature of the water at the outlet of the heating element.
D' autres particularités et avantages apparaîtront dans la description de deux modes de réalisation de la présente invention donnés à titre d'exemples non limitatifs et illustrés par les dessins mis en annexe dans lesquels :Other features and advantages will become apparent in the description of two embodiments of the present invention given as non-limiting examples and illustrated by the appended drawings in which:
- La figure 1 est une vue partielle d'un dispositif de production d'eau chaude comportant un élément chauffant conforme à un premier mode de réalisation de la présente invention, - La figure 2 est une vue en perspective de l'élément chauffant du premier mode de réalisation,FIG. 1 is a partial view of a hot water production device comprising a heating element according to a first embodiment of the present invention; FIG. 2 is a perspective view of the heating element of the first embodiment of the present invention; embodiment,
- La figure 3 est une vue en perspective éclatée de la zone de l'élément chauffant recevant le capteur de température, tirée de la figure 2, - La figure 4 est une vue similaire à la figure 2, correspondant à un second mode de réalisation, etFIG. 3 is an exploded perspective view of the zone of the heating element receiving the temperature sensor, taken from FIG. 2; FIG. 4 is a view similar to FIG. 2, corresponding to a second embodiment; , and
La figure 5 est une vue similaire à la figure 3 correspondant au second mode de réalisation.Figure 5 is a view similar to Figure 3 corresponding to the second embodiment.
Un dispositif de production d'eau chaude 1 permettant la production d'eau chaude en continu, à la demande, comprend un réservoir d'eau froide (monté de façon amovible) , un élément chauffant 2 permettant de produire de l'eau chaude à haute température (au moins 700C, de préférence environ 1000C) à la demande, et une pompe permettant de faire circuler l'eau dans l'élément chauffant 2. Cet élément chauffant 2 comporte une conduite de circulation d'eau 3 qui est situé en aval de la pompe, et un dispositif électrique de chauffe 4 adapté à chauffer l'eau circulant dans la conduite 3.A hot water production device 1 for producing hot water continuously, on demand, comprises a cold water tank (removably mounted), a heating element 2 making it possible to produce hot water. hot water at high temperature (at least 70 0 C, preferably about 100 0 C) on demand, and a pump for circulating the water in the heating element 2. This heating element 2 comprises a pipe of water circulation 3 which is located downstream of the pump, and an electric heating device 4 adapted to heat the water flowing in the pipe 3.
Dans le présent exemple, la conduite 3 est formée par une portion amont 5 d'entrée d'eau froide, une portion centrale 6 de chauffe et une portion aval 7 de sortie d'eau chaude. De façon plus précise, la portion amont 5 s'étend depuis la pompe jusqu'à la portion centrale 6, et la portion aval 7 s'étend depuis la portion centrale 6 jusqu'à l'orifice de sortie d'eau 8 du dispositif de production d'eau chaude 1. La portion centrale 6 est quant à elle définie comme étant la portion le long de laquelle s'étend le dispositif électrique de chauffe 4 qui, ici, est formé par une piste résistive sérigraphiée à la surface externe de cette portion 6.In the present example, the pipe 3 is formed by an upstream portion 5 of cold water inlet, a central heating portion 6 and a downstream portion 7 of hot water outlet. More specifically, the upstream portion 5 extends from the pump to the central portion 6, and the downstream portion 7 extends from the central portion 6 to the water outlet 8 of the device The central portion 6 is defined as being the portion along which extends the electric heating device 4 which, here, is formed by a resistive track screen printed on the outer surface of this portion 6.
Comme illustré à la figure 1, l'élément chauffant 2 comprend une chaudière 9 et une buse de distribution d'eau chaude 10. La chaudière 9 est disposée dans le boitier du dispositif de production d'eau chaude 1 et elle comporte la portion amont 5, la portion centrale 6 et le dispositif électrique de chauffe 4. La buse de distribution 10, quant à elle, est formée par la portion aval 7 et permet de distribuer l'eau chaude dans un récipient 18 tel qu'une tasse . La portion centrale 6 est de géométrie annulaire. Ainsi, elle est délimitée radialement par deux tubes (ici, coaxiaux) , l'eau ayant un flux général qui est parallèle à l'axe des deux tubes. Le tube externe 11 qui est métallique, porte à sa surface externe le dispositif électrique de chauffe 4. De plus, afin d'augmenter la longueur du trajet de l'eau dans cette portion 6, le circuit de l'eau entre les deux tubes est un circuit hélicoïdal autour de l'axe de ces derniers. Ainsi, le pas de progression est axial et il est défini par une paroi interne radiale elle-même hélicoïdale. Dans le présent exemple, la paroi interne hélicoïdale en matière plastique est portée par le tube interne qui est également en matière plastique. La très faible inertie du tube métallique externe 11 ainsi que de la structure plastique permettent d'obtenir une chauffe très rapide de la portion centrale 6 et de l'eau. De plus, le dispositif de production d'eau chaude (plus précisément, l'élément chauffant) comporte un capteur de température qui est adapté à permettre la régulation de la température de l'eau en sortie de l'élément chauffant (dans le présent exemple, il y a deux capteurs de température) . Ici, chaque capteur de température 13, 14 est à coefficient de température négatif (capteur de type CTN) . En outre, le dispositif de production d'eau chaude 1 comprend un module de régulation (module électronique) . Dans le présent exemple, le module de régulation permet de faire varier le débit de la pompe en fonction de la température mesurée par les capteurs 13, 14 (la puissance du dispositif électrique de chauffe 4 restant constante) .As illustrated in FIG. 1, the heating element 2 comprises a boiler 9 and a hot water dispensing nozzle 10. The boiler 9 is disposed in the housing of the hot water production device 1 and it comprises the upstream portion 5, the central portion 6 and the electric heating device 4. The dispensing nozzle 10, for its part, is formed by the downstream portion 7 and distributes the hot water in a container 18 such as a cup. The central portion 6 is of annular geometry. Thus, it is delimited radially by two tubes (here, coaxial), the water having a general flow which is parallel to the axis of the two tubes. The outer tube 11 which is metallic, carries on its external surface the electric heating device 4. In addition, in order to increase the length of the water path in this portion 6, the circuit of the water between the two tubes is a helical circuit around the axis of these. Thus, the progression step is axial and is defined by a radial inner wall itself helical. In the present example, the helical inner wall of plastic material is carried by the inner tube which is also made of plastic. The very low inertia of the outer metal tube 11 as well as the plastic structure makes it possible to obtain a very rapid heating of the central portion 6 and the water. In addition, the hot water production device (more precisely, the heating element) comprises a temperature sensor which is adapted to allow the regulation of the temperature of the water at the outlet of the heating element (in the present case). for example, there are two temperature sensors). Here, each temperature sensor 13, 14 has a negative temperature coefficient (CTN type sensor). In addition, the hot water production device 1 comprises a regulation module (electronic module). In the present example, the regulation module makes it possible to vary the flow rate of the pump as a function of the temperature measured by the sensors 13, 14 (the power of the electric heating device 4 remaining constant).
Comme illustré à la figure 2, un premier capteur 13 est fixé (ici, soudé) à la surface de la portion centrale 6 portant l'élément électrique de chauffe (ici, la surface externe du tube externe 11) . Ce premier capteur 13, adjacent à l'élément électrique de chauffe 4, est connecté au module de régulation de façon à permettre la régulation principale de la température de l'eau : la vitesse de pompage varie en fonction de la température mesurée par le premier capteur 13 afin d'obtenir une température constante en sortie de l'élément chauffant 2.As illustrated in Figure 2, a first sensor 13 is fixed (here, welded) to the surface of the central portion 6 carrying the electric heating element (here, the outer surface of the outer tube 11). This first sensor 13, adjacent to the electric heating element 4, is connected to the control module so as to allow the main regulation of the water temperature: the pumping speed varies according to the temperature measured by the first sensor 13 in order to obtain a constant temperature at the outlet of the heating element 2 .
En outre, conformément à la présente invention, un second capteur 14 est disposé dans une paroi délimitant la portion aval 7 de façon à être en contact avec l'eau. En l'occurrence, le second capteur 14 est disposé à proximité de l' extrémité amont de la portion aval 7. Plus précisément, ce capteur 14 comprend une plaquette 16 en un matériau thermiquement conducteur (ici, en céramique) et un élément 17 à coefficient de température négatif fixé à la plaquette 16. Dans le premier mode de réalisation, la plaquette 16 est fixée de façon étanche à un demi-cylindre 15 et, forme avec celle-ci, la paroi de la portion aval 7 ( cf. figure 3) .In addition, according to the present invention, a second sensor 14 is disposed in a wall delimiting the downstream portion 7 so as to be in contact with the water. In this case, the second sensor 14 is disposed near the upstream end of the downstream portion 7. More specifically, this sensor 14 comprises a wafer 16 made of a thermally conductive material (here, ceramic) and an element 17 to negative temperature coefficient fixed to the wafer 16. In the first embodiment, the wafer 16 is sealed to a half-cylinder 15 and, with it, the wall of the downstream portion 7 (see FIG. 3).
Dans le second mode de réalisation, la plaquette 16 est fixée de façon étanche au niveau d'un coude 20 (ici, l'angle du coude 20 est de 90° et la plaquette 16 est fixée de façon à former la bissectrice extérieure de ce coude 20) .In the second embodiment, the wafer 16 is sealingly attached at a bend 20 (here, the angle of the bend 20 is 90 ° and the wafer 16 is fixed to form the outer bisector thereof. elbow 20).
Du fait que l'eau chauffée soit directement en contact avec la plaquette 16 qui supporte l' élément CTN 17, les échanges thermiques sont meilleurs et permettent d' avoir une température plus précise et un temps de réponse plus court .Since the heated water is directly in contact with the wafer 16 which supports the CTN element 17, the heat exchanges are better and make it possible to have a more precise temperature and a shorter response time.
En outre, du fait que le second capteur 14 est disposé de façon affleurante avec cette paroi (la plaquette 16 forme la surface interne de la paroi) , la mesure de la température n'est pas perturbée ni par la dynamique de l'eau en mouvement, ni par la présence de bulles de vapeur contrairement à ce qui arriverait s'il était fixé de façon plongeante dans le flux. En outre, la disposition du second capteur 14 au niveau d'un coude (plus précisément, à la bissectrice extérieure du coude) dans le second mode de réalisation permet d'avoir des mesures de température encore meilleures.In addition, because the second sensor 14 is flush with this wall (the wafer 16 forms the inner surface of the wall), the temperature measurement is not disturbed by the dynamic of water in motion, nor by the presence of vapor bubbles contrary to what would happen if it were fixed in a dipping way in the flow. In addition, the arrangement of the second sensor 14 at a bend (more precisely, at the outer bisector of the bend) in the second embodiment makes it possible to have even better temperature measurements.
Le second capteur 14 est connecté au module de régulation de façon à permettre la correction de la mesure prise par le premier capteur 13. Il permet ainsi de mesurer la dispersion des éléments tels que la pompe, la portion de chauffe 6, l'élément électrique de chauffe 4 et la tension d'alimentation et de corriger l'erreur qui en découle. Il permet ainsi une régulation fine de la température d'eau en sortie du dispositif de chauffe 1.The second sensor 14 is connected to the regulation module so as to enable the measurement taken by the first sensor 13 to be corrected. It thus makes it possible to measure the dispersion of elements such as the pump, the heating portion 6, the electrical element 4 heating and supply voltage and correct the resulting error. It thus allows a fine regulation of the water temperature at the outlet of the heating device 1.
L'invention n'est pas limitée au présent mode de réalisation .The invention is not limited to the present embodiment.
Il serait ainsi possible que le second capteur 14 soit disposé ailleurs dans la portion aval, notamment à l'orifice de sortie d'eau 8 de la buse de distribution 10. Dans ce cas, le second capteur 14 permet également de prendre en compte les variations de température dues au déplacement de l'eau le long de la portion aval 7, ainsi que celles liées au matériau du récipient 18 recevant l'eau. En outre, dans le cas où la buse est démontable afin de faciliter son nettoyage, le capteur peut être sans fil, ou bien être positionné en haut de la buse et comprendre une pièce conductrice de chaleur venant en contact avec 1' eau . II serait également possible que le second capteur 14 (celui disposé dans la portion aval) soit utilisé seul pour réguler directement la température de l'eau, le premier capteur 13 (celui disposé dans la portion de chauffe) étant alors utilisé comme dispositif de sécurité en cas de surchauffe du dispositif électrique de chauffe 4.It would thus be possible for the second sensor 14 to be disposed elsewhere in the downstream portion, in particular at the water outlet orifice 8 of the dispensing nozzle 10. In this case, the second sensor 14 also makes it possible to take into account the temperature variations due to the displacement of the water along the downstream portion 7, as well as those related to the material of the container 18 receiving the water. In addition, in the case where the nozzle is removable in order to facilitate its cleaning, the sensor may be wireless, or be positioned at the top of the nozzle and comprise a heat conducting part coming into contact with the water. It would also be possible for the second sensor 14 (located in the downstream portion) to be used alone to directly regulate the temperature of the water, the first sensor 13 (that arranged in the heating portion) being then used as a safety device in case of overheating of the electric heating device 4.
Il serait également possible que la plaquette 16 du second capteur 14 s o i t r é a l i s é e e n un ma t é r i au thermiquement conducteur autre qu' une céramique, par exemple en métal . It would also be possible for the wafer 16 of the second sensor 14 to be exposed to a thermally conductive material other than a ceramic, for example metal.

Claims

Revendications claims
1. Elément chauffant (2) pour la production d'eau chaude en continu, comportant un dispositif électrique de chauffe (4) , une conduite (3) de circulation d'eau avec une portion centrale (6) le long de laquelle est disposé le dispositif électrique de chauffe (4) et une portion aval (7) de sortie d'eau chaude, et un capteur de température (14) adapté à permettre la régulation de la température de l'eau en sortie de l'élément chauffant (2) , caractérisé en ce que le capteur (14) est disposé dans une paroi délimitant la portion aval (7) de façon à être en contact avec l'eau en circulation.Heating element (2) for the continuous production of hot water, comprising an electric heating device (4), a pipe (3) for circulating water with a central portion (6) along which is arranged the electric heating device (4) and a downstream portion (7) of hot water outlet, and a temperature sensor (14) adapted to allow the regulation of the temperature of the water at the outlet of the heating element ( 2), characterized in that the sensor (14) is disposed in a wall delimiting the downstream portion (7) so as to be in contact with the circulating water.
2. Elément chauffant (2) selon la revendication 1, caractérisé en ce que le capteur (14) est disposé de façon affleurante avec la paroi qui le porte.2. heating element (2) according to claim 1, characterized in that the sensor (14) is arranged flush with the wall which carries it.
3 . E lément chau f f ant (2) selon l'une des revendications 1 ou 2, caractérisé en ce que le capteur (14) est à coefficient de température négatif. 3. Heating element (2) according to one of claims 1 or 2, characterized in that the sensor (14) has a negative temperature coefficient.
4 . E lément chau f f ant (2) s e l o n l ' u n e de s revendications 1 à 3, caractérisé en ce que le capteur (14) comprend une plaquette (16) , réalisée en un matériau thermiquement conducteur, faisant partie de la paroi délimitant la portion aval (7) . 4. Heating element (2) according to one of claims 1 to 3, characterized in that the sensor (14) comprises a plate (16) made of a thermally conductive material forming part of the wall delimiting the downstream portion. (7).
5 . E l éme n t chau f f an t (2) s e l o n l ' u n e d e s revendications 1 à 4, caractérisé en ce que le dispositif électrique de chauffe (4) est formé par une piste résistive sérigraphiée à la surf ace externe de la portion centrale ( 6) . 5. Heating element (2) according to one of Claims 1 to 4, characterized in that the electric heating device (4) is formed by a resistive track screen printed on the outer surface of the central portion (6). .
6 . E l éme n t chau f f an t (2) s e l o n l ' u n e d e s revendications 1 à 5, caractérisé en ce que la portion centrale (6) est de géométrie annulaire délimitée par deux tubes .6. Heating element (2) according to one of claims 1 to 5, characterized in that the portion central (6) is of annular geometry delimited by two tubes.
7. Elément chauffant selon la revendication 5, caractérisé en ce que le tube externe (11) porte le dispositif électrique de chauffe (4) .7. Heating element according to claim 5, characterized in that the outer tube (11) carries the electric heating device (4).
8 . Elément chauf f ant (2) selon l'une des revendications 6 ou 7, caractérisé en ce que le circuit de l'eau dans l'espace annulaire est un circuit hélicoïdal défini par une paroi radiale interne hélicoïdale. 8. Heating element (2) according to one of claims 6 or 7, characterized in that the circuit of the water in the annular space is a helical circuit defined by a helical radial internal wall.
9. Elément chauffant (2) selon la revendication 8, caractérisé en ce que la paroi interne radiale hélicoïdale est portée par le tube interne.9. heating element (2) according to claim 8, characterized in that the radial helical inner wall is carried by the inner tube.
10. Elément chauf fant (2) selon l'une des revendications 1 à 9, caractérisé en ce qu'il comprend, d'une part, une chaudière (9) qui comporte la portion centrale (6) et le dispositif électrique de chauffe (4) , et, d'autre part, une buse de distribution d'eau chaude (10) qui est adaptée à délivrer de l'eau chaude dans un récipient (18) et est formée par la portion aval (7) . 10. heating element (2) according to one of claims 1 to 9, characterized in that it comprises, on the one hand, a boiler (9) which comprises the central portion (6) and the electric heating device (4), and, on the other hand, a hot water dispensing nozzle (10) which is adapted to deliver hot water into a container (18) and is formed by the downstream portion (7).
11. Elément chauffant (2) selon la revendication 10, caractérisé en ce que le capteur (14) est disposé à l'ori f ice de sortie d' eau (8) de la buse de distribution (10) .11. heating element (2) according to claim 10, characterized in that the sensor (14) is disposed at the outlet of water (8) of the dispensing nozzle (10).
12. Elément chauffant (2) selon l'une des revendications 1 à 10 , caractéri sé en ce que le capteur (14) est disposé au niveau d'un coude (20) que forme la portion aval (7) .12. heating element (2) according to one of claims 1 to 10, characterized in that the sensor (14) is disposed at a bend (20) formed by the downstream portion (7).
13. Elément chauffant (2) selon la revendication 12, caractérisé en ce que le capteur (14) est disposé de façon à former la bissectrice extérieure du coude (20) .13. Heating element (2) according to claim 12, characterized in that the sensor (14) is arranged to form the outer bisector of the bend (20).
14. Elément chauf fant (2) selon l'une des revendications 1 à 13, caractérisé en ce qu'il comprend un capteur de température de chauffe (13) fixé à la surface externe de la portion centrale (6) portant l'élément électrique de chauffe (4) .14. heating element (2) according to one of claims 1 to 13, characterized in that it comprises a heating temperature sensor (13) fixed to the outer surface of the central portion (6) carrying the electric heating element (4).
15. Di spo s i ti f de product ion d' eau chaude (1) comprenant un élément chauffant (2) selon l' une des revendications 1 à 14, une pompe permettant la circulation de l'eau dans l'élément chauffant (2) , et un module de régulation permettant de faire varier le débit de la pompe en fonction de la température mesurée. 15. A hot water dispensing device (1) comprising a heating element (2) according to one of claims 1 to 14, a pump for circulating water in the heating element (2). ), and a control module for varying the flow rate of the pump as a function of the measured temperature.
16. Dispositif de production d'eau chaude (1) selon la revendication 15 dépendante de la revendication 14, caractérisé en ce que le module de régulation permet de réguler le débit d'eau en fonction de la température mesurée par le capteur (13) disposé à la portion centrale (6) , le capteur (14) disposé dans la portion aval (7) corrigeant la mesure prise par le capteur (13) disposé à la portion centrale (6) . 16. Hot water production device (1) according to claim 15, dependent on claim 14, characterized in that the regulation module makes it possible to regulate the flow of water as a function of the temperature measured by the sensor (13). disposed at the central portion (6), the sensor (14) disposed in the downstream portion (7) correcting the measurement taken by the sensor (13) disposed at the central portion (6).
PCT/FR2010/050305 2009-03-02 2010-02-23 Heating element for continuous hot water production WO2010100363A1 (en)

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CN201080010214.7A CN102341659B (en) 2009-03-02 2010-02-23 Heating element for continuous hot water production
EP10710375A EP2404122A1 (en) 2009-03-02 2010-02-23 Heating element for continuous hot water production

Applications Claiming Priority (2)

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FR0951300A FR2942654B1 (en) 2009-03-02 2009-03-02 HEATING ELEMENT FOR CONTINUOUS HOT WATER PRODUCTION
FR0951300 2009-03-02

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WO2013029364A1 (en) * 2011-08-26 2013-03-07 Chen Xiaoming Method and device for quick preparation of high-quality hot water
CN103438569A (en) * 2013-08-12 2013-12-11 杭州佐帕斯工业有限公司 Pump cavity electric heater

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FR2420726A1 (en) * 1978-03-21 1979-10-19 Commissariat Energie Atomique DEVICE FOR BRINGING A LIQUID TO A GIVEN TEMPERATURE
US4501952A (en) * 1982-06-07 1985-02-26 Graco Inc. Electric fluid heater temperature control system providing precise control under varying conditions
EP0869731B1 (en) * 1995-12-28 2000-03-15 Creaholic S.A. Coffee machine
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Publication number Priority date Publication date Assignee Title
WO2013029364A1 (en) * 2011-08-26 2013-03-07 Chen Xiaoming Method and device for quick preparation of high-quality hot water
CN103438569A (en) * 2013-08-12 2013-12-11 杭州佐帕斯工业有限公司 Pump cavity electric heater

Also Published As

Publication number Publication date
CN102341659B (en) 2014-03-12
FR2942654A1 (en) 2010-09-03
CN102341659A (en) 2012-02-01
EP2404122A1 (en) 2012-01-11
FR2942654B1 (en) 2011-12-16

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