EP3731596B1 - Échangeur de chaleur spirale - Google Patents

Échangeur de chaleur spirale Download PDF

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Publication number
EP3731596B1
EP3731596B1 EP20169807.3A EP20169807A EP3731596B1 EP 3731596 B1 EP3731596 B1 EP 3731596B1 EP 20169807 A EP20169807 A EP 20169807A EP 3731596 B1 EP3731596 B1 EP 3731596B1
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EP
European Patent Office
Prior art keywords
housing
heating element
flow channel
wall
channel section
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.)
Active
Application number
EP20169807.3A
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German (de)
English (en)
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EP3731596A2 (fr
EP3731596A3 (fr
Inventor
Manfred Gruber
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Att Advanced Thermal Technologies GmbH
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Att Advanced Thermal Technologies GmbH
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Publication of EP3731596A2 publication Critical patent/EP3731596A2/fr
Publication of EP3731596A3 publication Critical patent/EP3731596A3/fr
Application granted granted Critical
Publication of EP3731596B1 publication Critical patent/EP3731596B1/fr
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/54—Heating elements having the shape of rods or tubes flexible
    • H05B3/56—Heating cables
    • H05B3/565—Heating cables flat cables
    • 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
    • F24H1/101—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 using electric energy supply
    • F24H1/102—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 using electric energy supply with resistance
    • F24H1/103—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 using electric energy supply with resistance with bare resistances in direct contact with the fluid
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/18—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
    • 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
    • F24H1/101—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 using electric energy supply
    • F24H1/102—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 using electric energy supply with resistance
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the invention relates to a device for heating a fluid by means of electrical energy, wherein a cylindrical housing is provided with an inlet and an outlet for the fluid, and the inlet is connected to the outlet via a flow channel for the fluid that runs inside the housing around the cylinder axis of the housing with decreasing distance to the cylinder axis inwardly winding spiral flow channel section, which is formed by a wall arranged vertically between a cover plate and a bottom plate of the housing, which is provided with an electrical heating element designed as a web-shaped heating element for heating the flowing fluid , according to the preamble of claim 1.
  • Devices of the type mentioned are about from the CH 101971 A known.
  • the liquid flowing in via a central inlet is directed to the periphery of an inwardly winding spiral-shaped flow channel, which feeds the liquid to be heated to the interior of the device, where a web-shaped resistance element is attached to the innermost winding sections of the spiral-shaped flow channel and heats the liquid.
  • the spiral flow channel finally opens into a central outlet through which the heated liquid leaves the device.
  • the disadvantage of such devices is, on the one hand, the low efficiency of the device and, on the other hand, the lack of operational reliability. If the thermal energy formed by the resistance element is not sufficiently dissipated by the flowing liquid, the resistance element will be heated up, which can lead to the destruction of the heating element. It must therefore be ensured, for example, that the heating element is only switched on when the liquid is flowing, which is correspondingly complex in terms of control technology.
  • a heating device for windshield washer fluids is known in which the windscreen washer fluid is fed to an inwardly winding spiral flow channel.
  • the flow channel has a top plate and a bottom plate provided, which have a heating element provided with PTC resistance elements, which is controlled by a thermostat.
  • the resistance elements represent an electrical resistance in which electricity is converted into heat.
  • PTC resistance elements which are also known as PTC thermistors, have the property of increasing electrical resistance with increasing temperature.
  • the PTC resistance elements are used to heat up the windscreen washer fluid in a matter of seconds, whereby they are regulated to a higher temperature than that of the windscreen washer fluid.
  • the DE 19837923 C1 describes a device for the sterilization of liquids, in which the liquid to be sterilized is fed to an inwardly winding spiral-shaped flow channel which feeds the liquid to be sterilized to the interior of the device, where an electrical heating element is arranged which heats the liquid. The heated and thus sterilized liquid is subsequently cooled again via an outwardly winding flow channel and released as a cooled, sterilized liquid.
  • the DE 29618194 U1 describes a spiral heat exchanger in which a first liquid is fed to an inwardly winding spiral-shaped flow channel which opens into a central outlet via which the first liquid leaves the device. Furthermore, a second liquid is fed to an outwardly winding spiral-shaped flow channel which opens into an outlet via which the second liquid leaves the device.
  • the thermal energy of the first liquid can be transferred to the second liquid. It is therefore a heat exchanger for the transfer of thermal energy.
  • An electrical heating element for heating a liquid is not provided.
  • the KR 100762010 B1 shows a heating mat with an inductively heated liquid which is fed to a channel running in the form of a spiral in the heating mat, the inlet and outlet of which end in the inductive heating device.
  • the aim of the invention is therefore to provide a device for heating a fluid by means of electrical energy, which has a compact design and not only enables the fluid to be heated quickly, but can also be operated with a higher degree of efficiency compared to known devices. Furthermore, a high level of operational safety should be guaranteed.
  • Claim 1 relates to a device for heating a fluid by means of electrical energy, wherein a cylindrical housing is provided with an inlet and an outlet for the fluid, and the inlet is connected to the outlet via a flow channel for the fluid running inside the housing, which has a spiral-shaped flow channel section which winds inwardly around the cylinder axis of the housing with decreasing distance to the cylinder axis, which is formed by a wall arranged vertically between a cover plate and a base plate of the housing, which is equipped with an electrical heating element designed as a web-shaped heating element for heating the flowing fluid is provided.
  • the wall additionally forms a spiral flow channel section which winds outwards around the cylinder axis of the housing with increasing distance from the cylinder axis, the wall in a central area of the interior of the housing enclosing an end area which closes the inwardly winding flow channel section and which leads into the outlet opens, as well as an end area closing off the outward winding flow channel section into which the inlet opens and the outward winding flow channel section in a section of the wall closest to the housing inner wall opens into the inward winding flow channel section via a reversal area formed by a free end of the wall , wherein the wall is formed by the heating element in the form of a web, which is provided with PTC resistance elements, and as an interface between the outwardly winding flow channel section and the inwardly winding flow channel section.
  • the liquid to be heated is fed to the device according to the invention via the inlet which opens into the end region of the outwardly winding flow channel section.
  • the liquid thus flows from the central area of the housing into the peripheral areas of the interior of the housing, being heated by a surface of the web-shaped heating element which faces this outwardly winding flow channel section and which forms the wall of this flow channel section.
  • the outwardly winding flow channel section opens into a section of the wall closest to the housing inner wall via a reversal area formed by a free end of the wall into the inwardly winding flow channel section.
  • the liquid thus flows back from the peripheral regions of the interior of the housing into the central region of the housing, being further heated by a surface of the same web-shaped heating element facing the inwardly winding flow channel section.
  • the inwardly winding flow channel section ends in the central area of the housing in an end area which opens into the outlet. Since the wall formed by the web-shaped heating element is designed as an interface between the inwardly winding flow channel section and the outwardly winding flow channel section, the liquid flows around both surfaces of the same heating element.
  • the temperature difference between the liquid introduced into the central area via the inlet and the liquid discharged via the outlet, which is also located in the central area, is at a maximum.
  • the temperature difference between the liquid flowing on both sides of the heating element is also maximal, specifically in that section of the heating element which is arranged in the central area of the housing.
  • the temperature difference between the liquid flowing on both sides of the heating element is minimal. Is the mean value of the temperature on both sides of the heating element In contrast, it is almost constant over the entire course of the heating element. This ensures over the entire length of the web-shaped heating element that the temperature within the heating element provided with PTC resistance elements is approximately constant and the internal ohmic resistance of the PTC resistance elements per unit length is thus approximately constant over the length, which results in a uniform electrical power output in With regard to the temperature-dependent PTC resistance characteristic ensures. In the reversal area at the free end of the wall, the temperature of the fluid reaches approximately half the desired temperature increase between the inlet and outlet temperature.
  • the heating output emitted by the heating element along the flow path from the inlet to the reversal area should also correspond to half of the heating output provided for the entire flow path from the inlet to the outlet. Since the mean temperature value caused by the fluid is constant at every point of the heating element, the undesired effect of a reduction in the heating power due to the PTC characteristic is eliminated, whereby the possible heating power of the device can be increased drastically in a given installation space and the efficiency is optimized.
  • the inside of the housing is ideally used due to the maximized heated surface and the heat transfer to the fluid flowing through is optimized. In this way, compact structural designs are made possible.
  • a specific structural design provides for the heating element, which is in the form of a web, to cross the housing jacket in a first end section via a fluid-tight, slot-shaped fastening area and to form a first end of the heating element that has electrical connections and is located outside the housing, and the inside in a second end section the housing arranged, free end of the wall forms.
  • the tightness can be ensured, for example, by potting the fastening area with potting compound or adhesive.
  • the heating element which is in the form of a web, can also be fastened with its long sides in grooves in the cover plate and the base plate of the housing.
  • the free end of the heating element which is arranged in the form of a web, is provided with a stabilizing rod which is attached to the cover plate and the base plate of the housing.
  • the heating element consists in a known manner of a web-shaped substrate (preferably made of plastic), a heat distribution layer made of metal, electrodes and a heating layer made of PTC resistance elements, for example carbon pastes or ceramic layers, which act as an ohmic resistance and are applied using the screen printing process.
  • the heating element can be insulated from the outside by a dielectric cover film.
  • the PTC material of the PTC resistance elements is characterized by a strongly non-linear characteristic curve, in that the electrical resistance of the material increases with increasing temperature (caused by operation or passive heating) and the material finally increases at the material-specific cut-off temperature becomes high resistance. This reduces the electrical heating output and there is no further heating. This also applies to local thermal inhomogeneities such as air inclusions in the fluid.
  • the heating element used is self-regulating and cannot overheat.
  • the PTC material of the PTC resistance elements enables particularly rapid heating compared to conventional resistance materials.
  • the web-shaped heating element is designed as a heating film which is folded around its longitudinal axis and around its transverse axis to form the wall.
  • the heat distribution layer which is arranged on one side, is now on the outside on both sides of the heating element and faces the respective flow channel section.
  • the substrate of the heating foil forms a separating one Layer between the electrically conductive layers in the form of the electrodes and the heating layer and the fluid, which reduces the risk of short circuits.
  • the front sides come to lie along the two broad sides of the heating film on the same side, which can now be arranged outside the housing. There are therefore no cut edges on the heating foil that would be exposed to the fluid, so that a short circuit is again prevented.
  • the inlet and the outlet are arranged on different sides of the housing. This arrangement makes it easier to couple several devices in series in order to achieve a higher heating output overall in this way. In order to heat a larger volume of fluid, several devices can also be arranged in parallel.
  • Fig. 1 Reference is made to explain the course of the flow channel sections 1a, 1b within a housing 2 of the device.
  • the liquid to be heated is supplied via an inlet 3 which is arranged in the central area of the interior of the housing and opens into the end area of an outwardly winding flow channel section 1a.
  • the liquid thus flows from the central area of the housing 2 into the peripheral areas of the interior of the housing, being heated by a surface of the web-shaped heating element 4 which faces this outwardly winding flow channel section 1a and which forms the wall of this flow channel section 1a.
  • the outwardly winding flow channel section 1a opens in a section of the wall closest to the housing inner wall via a reversal area formed by a free end of the web-shaped heating element 4 into the inwardly winding flow channel section 1b.
  • the liquid thus flows back from the peripheral areas of the interior of the housing into the central area of the housing 2, being further heated by a surface of the same web-shaped heating element 4 facing the inwardly winding flow channel section 1b.
  • the inwardly winding flow channel section 1b ends in the central area of the housing 2 finally in an end area which into the outlet 5 (in the Fig. 1 for a better understanding drawn in dashed lines) opens. Since the wall formed by the web-shaped heating element 4 is designed as an interface between the outwardly winding flow channel section 1a and the inwardly winding flow channel section 1b, the liquid flows around both surfaces of the same heating element 4.
  • the flow path shown thus directs the cool fluid entering centrally through the inlet 3 along the flow channel section 1a formed by the heating element 4, which is arranged in a spiral shape, and outwards, where it is deflected and again along a path between the paths through which the flow passes first, second Flow channel section 1b flows inwards and emerges again from the housing 2 through the outlet 5. Since the wall is formed from the heating element 4, the fluid is heated when the heating element 4 is switched on and thus gives off its heat to the fluid.
  • the PTC effect of the PTC resistance elements of the heating element 4 would in itself cause the electrical resistance of the heating element 4 to rise in the outer areas of the spiral-shaped heating element 4 due to the higher temperature of the fluid and the heating power to decrease, which is contrary to the aim of The greatest possible warming of the fluid flowing through the housing 2 is present along the entire flow path.
  • the flow channel 1 proposed according to the invention now makes it possible in an advantageous manner that fluids with temperatures whose average is constant in each case are located on both sides of the spiral-shaped heating element 4 at every point.
  • the coolest fluid is located in the area of the inflow point, while the hottest fluid is located on the other side of the heating element 4 because it has already flowed through the entire flow path and has therefore absorbed the maximum heating power.
  • the average of the two temperatures largely corresponds to the temperature in the deflection area of the flow path, where the cool fluid has flowed through approximately half of the flow path and thus has absorbed approximately half of the heating power. Since the average temperature resulting from the fluid is constant at every point on the heating element 4, the undesirable effect of a reduction in the heating power due to the PTC effect is eliminated, which drastically increases the possible heating power of the device in a given installation space.
  • the Fig. 2 shows first a perspective view of an embodiment of the device according to FIG Fig. 1 with base plate 2B and inserted heating element 4, but without cover plate 2D and housing jacket 2M.
  • the heating element 4 which is in the form of a web, is fastened with one of its two longitudinal sides in a spiral-shaped groove in the base plate 2B of the housing 2.
  • a first end section 4.1 of the web-shaped heating element 4 is arranged outside the housing 2. At this first end section 4.1 the electrical connections of the heating element 4 are located. Furthermore, an opening in the base plate 2B for the inlet 3 can be seen.
  • inlet 3 and outlet 5 is arbitrary, however, since the device can be operated in both directions, so that the inlet 3 can also be arranged in the cover plate 2D and the outlet 5 in the base plate 2B. In addition, both the inlet 3 and the outlet 5 could also be arranged in the base plate 2B, or both the inlet 3 and the outlet 5 in the cover plate 2D.
  • the heating element 4 in the form of a web forms a free end of the wall which is arranged inside the housing 2 and defines the reversal area between the outwardly winding flow channel section 1a and the inwardly winding flow channel section 1b.
  • the free end of the heating element 4, which is arranged in the form of a web, and which is arranged inside the housing 2 can be provided with a stabilizing rod which is attached to the cover plate 2D and the base plate 2B of the housing 2.
  • the Fig. 3 shows a perspective view of the embodiment of a device according to the invention according to FIG Fig. 1 with the base plate 2B, the inserted heating element 4 and a housing jacket 2M, but without a cover plate 2D. Furthermore, it can be seen that the heating element 4, which is in the form of a web, crosses the housing jacket 2M in its first end section 4.1 via a fluid-tight, slot-shaped fastening area 6. The tightness of the fastening area 6 can be ensured, for example, by potting the fastening area 6 with potting compound or adhesive.
  • FIG. 11 shows a perspective view of the entire device according to FIG Fig. 1 with base plate 2B, cover plate 2D and housing jacket 2M, as well as with inserted heating element 4, of which in the Fig. 4 only the first end section 4.1 arranged outside the housing 2 can be seen.
  • the inlet 3 formed with the aid of a tubular inlet is arranged in the base plate 2B of the housing 2.
  • the outlet 5 formed with the aid of a tubular drain is arranged in the cover plate 2D of the Housing 2.
  • the base plate 2B, the cover plate 2D and the housing jacket 2M can each be produced by injection molding, 3D printing or milling.
  • the inlet 3 and the outlet 5 are arranged on different sides of the housing 2.
  • This arrangement makes it easier to couple a plurality of devices in series in order in this way to achieve a higher heating output overall, the outlet 5 of one device being coupled to the inlet 3 of a subsequent device.
  • a plurality of devices could also be arranged in parallel, the respective inlets 3 being connected to one another via a common feed line, and the respective outlets 5 being connected to one another via a common drainage line.
  • the heating element 4 consists in a known manner of a web-shaped substrate 7 (preferably made of plastic), a heat distribution layer 8 made of a metallic material, electrodes 9, and a heating layer 10 made of PTC resistance elements, for example carbon pastes or ceramic layers, which are used as ohmic Resistance work.
  • the electrodes 9 can, for example, be made of a hardened, silver-based paste which is applied in viscous form to the substrate 7 by means of screen printing with the desired course and is thermally hardened.
  • the PTC resistance elements of the heating layer 10 can be made of a hardened, carbon-based paste, which is also referred to as carbon paste and which can also be applied in viscous form to the substrate 7 in the desired arrangement by means of screen printing and thermally cured at room temperature.
  • the heating element 4 can be insulated from the outside by a dielectric cover film 11.
  • the electrical resistance of the PTC resistance elements also changes based on a characteristic curve that shows a marked increase in the case of a PTC lacquer at around 130 ° C., for example. This marked increase in the characteristic curve means that there is no further heating above 130 ° C.
  • the heating element 4 used is therefore self-regulating and cannot overheat.
  • the PTC resistance elements enable particularly rapid heating compared to conventional resistance materials. After an initial warm-up phase, the area-related heating power averaged over the entire surface of the heating element 4 is approximately 100 kW / m 2 .
  • the core temperature of the heating element 4 occurring in the heating layer 10 is a maximum of 120.degree.
  • the heating element 4 in the form of a heating film is folded around its longitudinal axis L and around its transverse axis Q to form the wall.
  • the heat distribution layer 8 which is arranged on one side, is now on the outside on both sides of the heating element 4 and faces the respective flow channel section 1a, 1b.
  • the surface of a first side of the folded, sheet-shaped heating element 4 always faces the outwardly winding flow channel section 1a, and the surface of the second side of the folded, sheet-shaped heating element 4 always faces the inwardly winding flow channel section 1b.
  • the web-shaped substrate 7 forms a separating layer between the electrically conductive layers in the form of the electrodes 9 and the heating layer 10 and the fluid, which reduces the risk of short circuits.
  • the front sides come to lie along the two broad sides of the heating film on the same side, which can now be arranged outside the housing 2. There are thus no cut edges of the heating foil that would be exposed to the fluid, so that a short circuit is again prevented.
  • a device for heating a fluid by means of electrical energy which has a compact design and not only enables the fluid to be heated quickly, but can also be operated with a higher degree of efficiency compared to known devices. Furthermore, a high level of operational reliability can be guaranteed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Claims (7)

  1. Dispositif pour chauffer un fluide au moyen d'énergie électrique, dans lequel un boîtier cylindrique (2) est pourvu d'une entrée (3) et d'une sortie (5) pour le fluide, et l'entrée (3) est reliée à la sortie (5) par un canal d'écoulement (1) pour le fluide qui s'étend à l'intérieur du boîtier (2) et présente une section de canal d'écoulement en forme de spirale s'enroulant vers l'intérieur (1b) autour de l'axe de cylindre du boîtier (2) avec une distance décroissante par rapport à l'axe de cylindre, qui est formée par une paroi disposée perpendiculairement entre une plaque supérieure (2D) et une plaque inférieure (2B) du boîtier (2), laquelle paroi est pourvue d'un élément chauffant électrique (4) réalisé sous la forme d'un élément chauffant en forme de bande (4) pour chauffer le fluide qui s'écoule, caractérisé en ce que la paroi forme en outre une section de canal d'écoulement en forme de spirale s'enroulant vers l'extérieur (1a) autour de l'axe de cylindre du boîtier (2) avec une distance croissante par rapport à l'axe de cylindre, dans lequel la paroi délimite, dans une zone centrale de l'intérieur de boîtier, une zone d'extrémité fermant la section de canal d'écoulement s'enroulant vers l'intérieur (1b), qui débouche dans la sortie (5), ainsi qu'une zone d'extrémité fermant la section de canal d'écoulement s'enroulant vers l'extérieur (la), dans laquelle débouche l'entrée (3), et la section de canal d'écoulement s'enroulant vers l'extérieur (1a) débouche dans la section de canal d'écoulement s'enroulant vers l'intérieur (1b) dans une section de la paroi la plus proche de la paroi intérieure de boîtier par une zone d'inversion formée par une extrémité libre de la paroi, dans lequel la paroi est formée par l'élément chauffant réalisé en forme de bande (4) qui est pourvu d'éléments résistifs CTP et est réalisé sous la forme d'une surface de séparation entre la section de canal d'écoulement s'enroulant vers l'extérieur (1a) et la section de canal d'écoulement s'enroulant vers l'intérieur (1b).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément chauffant réalisé en forme de bande (4) traverse, dans une première section d'extrémité (4.1), l'enveloppe de boîtier (2M) du boîtier cylindrique (2) par une zone de fixation (6) étanche aux fluides en forme de fente et forme une première extrémité de l'élément chauffant (4) disposée à l'extérieur du boîtier (2) et présentant des connexions électriques, et forme, dans une deuxième section d'extrémité (4.2), l'extrémité libre de la paroi disposée à l'intérieur du boîtier (2).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'élément chauffant (4) réalisé en forme de bande est fixé par ses côtés longitudinaux dans des rainures de la plaque supérieure (2D) et de la plaque inférieure (2B) du boîtier (2).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'extrémité libre de l'élément chauffant réalisé en forme de bande (4) disposé à l'intérieur du boîtier (2) est pourvue d'une tige de stabilisation qui est fixée à la plaque supérieure (2D) et à la plaque inférieure (2B) du boîtier (2) .
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'élément chauffant en forme de bande (4) est réalisé sous la forme d'un film chauffant plié autour de son axe longitudinal (L) pour former la paroi.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'élément chauffant en forme de bande (4) est réalisé sous la forme d'un film chauffant plié autour de son axe transversal (Q) pour former la paroi.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que l'entrée (3) et la sortie (5) sont disposées sur des côtés différents du boîtier (2).
EP20169807.3A 2019-04-23 2020-04-16 Échangeur de chaleur spirale Active EP3731596B1 (fr)

Applications Claiming Priority (1)

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AT601042019A AT522500B1 (de) 2019-04-23 2019-04-23 Spiralwärmetauscher

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EP3731596A2 EP3731596A2 (fr) 2020-10-28
EP3731596A3 EP3731596A3 (fr) 2020-11-04
EP3731596B1 true EP3731596B1 (fr) 2021-06-16

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Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH101971A (de) 1923-06-06 1923-11-01 Jost Emil Elektrischer Heizapparat für Flüssigkeiten.
EP0104673B1 (fr) 1982-09-24 1987-11-19 Onofrio Rocchitelli Dispositif de chauffage de liquide de lavage de vitres de véhicules automobiles et analogues
US5326537A (en) * 1993-01-29 1994-07-05 Cleary James M Counterflow catalytic device
DE29618194U1 (de) 1996-08-29 1996-12-12 Gea Canzler Gmbh Spiralwärmetauscher
AU3784399A (en) * 1998-05-05 1999-11-23 Thermatrix Inc. A device for thermally processing a gas stream, and method for same
DE19837923C1 (de) 1998-08-20 2000-01-20 Hans Biermaier Vorrichtung zum thermischen Sterilisieren von Flüssigkeiten
JP3889698B2 (ja) * 2002-11-22 2007-03-07 本田技研工業株式会社 蓄熱装置
KR100762010B1 (ko) 2006-07-07 2007-09-28 윤국선 유도가열 방식의 온열매트
DE102009021656A1 (de) * 2009-05-16 2010-11-18 Wmf Württembergische Metallwarenfabrik Ag Durchlauferhitzer und Verfahren zur Steuerung und Regelung eines solchen
WO2011072453A1 (fr) * 2009-12-18 2011-06-23 Advanced Materials Enterprises Company Limited Appareil de chauffage d'eau
KR20130107764A (ko) * 2012-03-23 2013-10-02 홍성훈 전기 순간 온수 가열관로

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AT522500B1 (de) 2020-12-15
ES2886339T3 (es) 2021-12-17
AT522500A1 (de) 2020-11-15
EP3731596A2 (fr) 2020-10-28
EP3731596A3 (fr) 2020-11-04

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