EP3982055B1 - Dispositif de chauffage de fluide - Google Patents

Dispositif de chauffage de fluide Download PDF

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Publication number
EP3982055B1
EP3982055B1 EP20201406.4A EP20201406A EP3982055B1 EP 3982055 B1 EP3982055 B1 EP 3982055B1 EP 20201406 A EP20201406 A EP 20201406A EP 3982055 B1 EP3982055 B1 EP 3982055B1
Authority
EP
European Patent Office
Prior art keywords
casing
fluid
heating
heating device
heating element
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
EP20201406.4A
Other languages
German (de)
English (en)
Other versions
EP3982055A1 (fr
EP3982055C0 (fr
Inventor
Andrea Sultato
Mauro Galiazzo
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.)
HT SpA
Original Assignee
HT SpA
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Publication date
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Priority to EP20201406.4A priority Critical patent/EP3982055B1/fr
Publication of EP3982055A1 publication Critical patent/EP3982055A1/fr
Application granted granted Critical
Publication of EP3982055C0 publication Critical patent/EP3982055C0/fr
Publication of EP3982055B1 publication Critical patent/EP3982055B1/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
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • 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
    • 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
    • F24H1/165—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 fluid fuel
    • 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
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F24H9/0021—Sleeves surrounding heating elements or heating pipes, e.g. pipes filled with heat transfer fluid, for guiding heated liquid
    • 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 present invention relates to a fluid heater.
  • the present invention relates to a heat exchanger adapted to heat a fluid that passes close to a heating element.
  • a device of this type normally includes a resistor, or resistive element, positioned in a tubular casing.
  • Such casing may be made of thermally conductive or insulating material according to the use envisaged, connected to a power circuit.
  • dual-wall heating devices may be provided, wherein two tubular casings (and therefore two respective resistors) are arranged coaxially one inside the other.
  • Exchangers of this type provide for a fluid to be heated to flow close to the electric resistor, in which a potential difference is established.
  • the difference in temperature therefore depends on a series of factors, for example the power developed by the resistor, the properties of the fluid and/or of the materials forming the exchange walls and the sizes thereof and speed with which the fluid crosses the exchanger.
  • a fluid heating device having the features of the preamble of the appended claim 1 is also known from EP0082025A1 , US2014/050466A1 and GB946326A .
  • FIGS. 1 to 3 show a fluid heating device 100, which heating element 1 in the case described is a cartridge resistor enclosed by a casing.
  • the heating element 1 is for example, substantially cylindrical-shaped and may have, at an end thereof, pins 11 for connection to the electric source, fastening means (not shown), e.g. screws, and also sensors, e.g. temperature control sensors (they also not shown).
  • first dissipating element 2 preferably shaped as a helicoid, for example consisting of a metal coil.
  • a first substantially tubular-shaped casing 4 entirely encloses the first dissipating element 2 and at least partially the heating element 1.
  • a second dissipating element 21 and a second casing 3 are arranged externally to the first casing 4 in order to at least partially envelop the casing 4, in a coaxial arrangement.
  • the first casing 4 has an open end, the one covered by the second casing 3, and a closed end, to allow the circulation of the fluid therein.
  • a first outlet valve 51 for the fluid is on the first casing 4, while a second inlet valve 50 is obtained on the second casing 3.
  • the dissipating elements 2 and 21 are constructed so that the coils thereof adhere respectively to the walls of the heating element 1 and of the first casing 4, and to the ones of the first casing 4 and of the second casing 3; therefore, the elements 2 and 21 may serve a function of thermal bridge for transmitting heat by conduction, not only to the circulating fluid but also between the casings 4 and 3 themselves.
  • the dissipating element 2 is in contact with the internal surface of the first casing 4 and with the external surface of the heating element 1; when present, the dissipating element 21 is in contact with the internal surface of the second casing 3 and with the external surface of the first casing 4: thereby, a structurally simple and above-all efficient path for channelling the fluid is created between inlet and outlet between the walls of the heating element 1 and of the first casing 4 and in the same way between the walls of the first casing 4 and of the second casing 3.
  • valve 50 indeed initially runs through the coil comprised in the gap identified by the two casings 3 and 4 (in the direction shown by arrows A in Figure 1 ).
  • a pre-heating of the fluid itself occurs in this portion due to the heat from the most inner section wherein the fluid is in direct contact with the heating element 1, which therefore has an increased temperature.
  • the fluid is channelled into the gap comprised between the first casing 4 and the heating element 1, running through it in opposite direction to the first gap, towards the outlet valve 51 (arrow C).
  • the dissipating elements 2, 21, together with the casings 3, 4, are also part of the hydraulic circuit.
  • the casing 3 maintains the second dissipating element 21 made in a coil in compression, which in turn ensures the fact that both the first dissipating element 2 and the casing 4 remain in contact and in position on the heating element 1, thus creating a reliable and at the same time, functional system.
  • a further peculiar feature of the device described is the fact that the portion of the first casing 4 not covered by the second casing 3 may be modulated as a function of the general optimization of the system and of the temperature desired for the outlet fluid.
  • the heating element 1 also incorporates the dissipating element 2, which is built integrally with the heating element 1 itself.
  • the dissipating element 2 has also a helical or spiral shape, in order to direct the flow of fluid to be heated according to arrows A.
  • Heat transmission is much more efficient because there is no wall effect at the junction, which can possibly occur in the first embodiment.
  • the thermal exchange surface between the fluid and heating element 1 is thus increased, since in the first embodiment the dissipating element 2 was in turn heated by the heating element, whereas in this case it transfers heat directly to the fluid.

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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)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Resistance Heating (AREA)

Claims (7)

  1. Dispositif de chauffage (100) pour chauffer un fluide, comprenant un élément chauffant (1), un premier élément dissipateur (2) et une première enveloppe (4) de forme sensiblement tabulaire qui renferme ledit premier élément dissipateur (2) et, au moins partiellement, ledit élément chauffant (1), ledit premier élément dissipateur (2), ledit élément chauffant (1) et ledit premier boîtier (4) étant positionnés de telle sorte que ledit premier élément dissipateur (2), qui a sensiblement la forme d'un hélicoïde et qui est placé autour dudit élément chauffant (1), est en contact avec ledit élément chauffant (1) et avec ladite première enveloppe (4) de sorte qu'ils définissent un premier chemin de canalisation pour le fluide à chauffer au moyen de la chaleur produit par l'élément chauffant (1), ledit élément dissipateur (2) étant construit d'un seul tenant, ou d'une seule pièce, avec ledit élément chauffant (1), dans lequel ledit premier boîtier (4) est entouré, au moins partiellement, par un second boîtier (3), caractérisé en ce que ledit dispositif de chauffage (100) comprend un deuxième élément dissipateur (21), qui est sensiblement en forme d'hélicoïde et qui est placé autour dudit premier boîtier (4), est enfermé par ledit deuxième boîtier (3) et positionné de sorte qu'il soit en contact avec ledit premier boîtier (4) et avec ledit deuxième boîtier (3) de sorte qu'ils définissent un deuxième chemin de canalisation pour ledit fluide.
  2. Dispositif de chauffage (100) selon la revendication 1, caractérisé en ce que ladite première enveloppe (4) est munie d'une extrémité ouverte.
  3. Dispositif de chauffage (100) selon la revendication 1, caractérisé en ce que ledit second élément dissipateur (21) est en contact avec une surface interne dudit second boîtier (3) et est réalisé d'un seul tenant, ou d'une seule pièce, avec une surface externe dudit premier boîtier (4).
  4. Dispositif de chauffage (100) selon au moins l'une des revendications précédentes, caractérisé en ce qu'il comprend une vanne de sortie (51) et une vanne d'entrée (50), respectivement pour permettre la sortie et l'entrée du fluide à chauffer, dans lequel au moins une entre ladite vanne de sortie (51) et ladite vanne d'entrée (50) est placée sur ledit premier carter (4).
  5. Dispositif de chauffage (100) selon la revendication 4, caractérisé en ce que ladite vanne de sortie (50) et ladite vanne d'entrée (50) sont placées respectivement sur ledit premier boîtier (4) et sur ledit deuxième boîtier (3).
  6. Dispositif de chauffage (100), selon au moins l'une des revendications précédentes, caractérisé en ce que ledit élément chauffant (1) est une cartouche résistive.
  7. Procédé de fabrication d'un dispositif de chauffage (100) selon l'une quelconque des revendications précédentes 1 à 6, comprenant une étape de traitement mécanique pour produire ledit premier élément dissipateur (2) d'un seul tenant, ou en une seule pièce, avec ledit élément chauffant (1).
EP20201406.4A 2020-10-12 2020-10-12 Dispositif de chauffage de fluide Active EP3982055B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20201406.4A EP3982055B1 (fr) 2020-10-12 2020-10-12 Dispositif de chauffage de fluide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20201406.4A EP3982055B1 (fr) 2020-10-12 2020-10-12 Dispositif de chauffage de fluide

Publications (3)

Publication Number Publication Date
EP3982055A1 EP3982055A1 (fr) 2022-04-13
EP3982055C0 EP3982055C0 (fr) 2023-09-27
EP3982055B1 true EP3982055B1 (fr) 2023-09-27

Family

ID=73597749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20201406.4A Active EP3982055B1 (fr) 2020-10-12 2020-10-12 Dispositif de chauffage de fluide

Country Status (1)

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EP (1) EP3982055B1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB946326A (en) * 1961-03-10 1964-01-08 Patrick Graham Stirling Improved finned type electric heating device
US4563571A (en) * 1981-12-16 1986-01-07 Matsushita Electric Industrial Company, Limited Electric water heating device with decreased mineral scale deposition
DE102012107600B4 (de) * 2012-08-20 2015-10-08 Borgwarner Ludwigsburg Gmbh Elektrische Heizvorrichtung zum Beheizen von Fluiden

Also Published As

Publication number Publication date
EP3982055A1 (fr) 2022-04-13
EP3982055C0 (fr) 2023-09-27

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