EP2565551B1 - Bloc de chauffage et chauffe-eau instantané - Google Patents

Bloc de chauffage et chauffe-eau instantané Download PDF

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Publication number
EP2565551B1
EP2565551B1 EP20120182534 EP12182534A EP2565551B1 EP 2565551 B1 EP2565551 B1 EP 2565551B1 EP 20120182534 EP20120182534 EP 20120182534 EP 12182534 A EP12182534 A EP 12182534A EP 2565551 B1 EP2565551 B1 EP 2565551B1
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EP
European Patent Office
Prior art keywords
section
heating
cross
heat block
deflecting
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
EP20120182534
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German (de)
English (en)
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EP2565551A1 (fr
Inventor
Franz Bauer
Christian Englisch
Gebhard Mayer
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL12182534T priority Critical patent/PL2565551T3/pl
Publication of EP2565551A1 publication Critical patent/EP2565551A1/fr
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Publication of EP2565551B1 publication Critical patent/EP2565551B1/fr
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    • 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

Definitions

  • the invention relates to a heating block for an electric instantaneous water heater, in particular for the provision of heating water, according to the preamble of claim 1, with a housing in which a meandering heating section is designed for heating a liquid having a plurality of heating channels for receiving heating coils and a plurality of U-shaped deflection areas for deflecting the liquid between the respective adjacent heating channels, and a water heater.
  • Heating blocks for instantaneous water heaters for providing heating water are usually designed as a bare-wire systems in which bare heating coils lie directly in the water flow.
  • bare-wire systems In comparison to tubular heating elements, bare-wire systems have small heat capacities with a high control dynamic.
  • air bubbles in the water flow can significantly complicate the complete flow around the heating coils with water, whereby the heating coils in the respective anhydrous section can overheat and burn through.
  • Heating channels in the heating blocks are like in the DE 19 651 087 C2 shown, usually meander-shaped and oriented vertically in the installation position of the water heater. It turns out that those areas of the heating channels are particularly endangered by air bubbles, in which the water flow is guided downwards. The buoyancy of the air bubbles counteracts the flow and the air bubbles are only carried along by the flow at a sufficiently large flow rate. A particularly critical area is immediately downstream of the upper deflection areas. Investigations have shown that, in particular, a gradual widening of the flow cross-section downstream of the upper deflection regions favors the attachment of air bubbles to channel inner walls. A heating block with a gradual widening of the flow cross section is in FIG. 1 shown.
  • the heating block has a two-part housing 1, which is formed by two half-shells 2, 4.
  • the housing 1 and the interconnected half shells 2, 4 define a meandering Heating path, which is formed by a plurality of heating channels 6a, 6b and a plurality of deflection regions 8, which connect the adjacent heating channels 6a, 6b with each other.
  • a meandering Heating path which is formed by a plurality of heating channels 6a, 6b and a plurality of deflection regions 8, which connect the adjacent heating channels 6a, 6b with each other.
  • the deflection regions 8 are reduced in cross-section with respect to the heating channels 6a, 6b.
  • the upper deflecting regions 8 in the installation position of the heating block or of the throughflow heater each have a conically tapered inlet section 10 and a conically widened outlet section 12.
  • the object of the invention is to provide a heating block, which eliminates the aforementioned disadvantages and has an improved flow behavior, so that in particular a fixing of air bubbles downstream of in an installation position upper deflection is prevented. Furthermore, it is an object of the invention to provide a robust water heater.
  • An inventive heating block for an electric instantaneous water heater in particular for the provision of heating water, has a housing in which a meandering heating section is designed for heating a liquid, which is a plurality of heating channels for receiving heating coils and a plurality of U-shaped deflection regions for deflecting the liquid between the respective adjacent heating channels.
  • the upper deflection regions in the installation position, have an inlet section for reducing a flow cross-section of the heating channels to a deflection cross-section and a discharge section, which opens into the respective heating channel in a stepped manner.
  • a uniform flow over the cross section of the outlet sections of the upper deflection areas or the upper outlet sections can be achieved if they are straight.
  • a uniform introduction of the turbulence over the flow cross-section can be achieved if the upper outlet sections are oriented coaxially to the respective heating channel and thus open the front side centrally into the heating channels.
  • the upper outlet sections each have a constant outlet cross-section, so that the liquid flow enters the respective heating channel with uniform pressure and speed ratios.
  • the upper outlet cross section may be equal to the upper deflection cross section, so that the two features deflecting and swirling or introducing tolerances for bladder driving are both locally and functionally separated.
  • the heating block according to the invention can be optimized in particular for domestic use, when the upper outlet sections have an axial extent of about 10mm to 20mm.
  • the upper outlet portions and the upper inlet portions have a same axial extent.
  • the lower deflecting areas in the installation position each have a lower deflecting cross section corresponding to the flow cross section.
  • the deflection regions each have a deflection section defining the upper and lower deflection cross-sections, which extends in the transverse direction of the heating channels between the inlet section and the outlet section.
  • An inventive flow heater is provided with a heating block according to the invention.
  • Such a water heater is characterized by a high insensitivity to changing flow rates and thus by a high degree of robustness.
  • the invention is particularly suitable for providing a heating block for an electrically heated water heater in the field of home appliance technology, which is insensitive to changing flow rates and thus robust and low maintenance.
  • FIG. 2 a lower shell 14 of a two-part housing of a heating block according to the invention for an electrically heated water heater for providing heating water in the domestic area is shown.
  • An upper shell for forming the housing is not shown, but this is almost identical to the lower shell 14, so that the explanations relating to the lower shell 14 essentially also apply to the upper shell.
  • the housing of the heating block which is executed in bare wire technology, defines a heating section 16 for heating the water flowing through the water heater.
  • the heating section 16 is viewed in the parting plane of the housing in each case half in the lower shell 14 and taken in half in the upper shell, not shown.
  • the lower shell 14 has an inlet connection 18 and an outlet connection 20, which are in fluid communication with a supply line 22 and an overflow section 24.
  • the delay line 22 and the overrun section 24 are respectively formed meander-like and have over their entire length a constant and same flow cross-section.
  • the heating section 16 extends meandering between the flow path 22 and the overrun 24. It has a plurality of heating channels 26a to 26f and a plurality of deflection regions 28a to 28f.
  • the heating channels 26a to 26f serve to receive heating elements, in particular heating coils. They are straight and run parallel next to each other in the longitudinal direction of the housing. They have a constant flow cross section, which is increased compared to the flow cross section of the flow path 22 and the overrun section 24.
  • For energizing the Heating elements is formed in the heating channels 26a to 26f each have an opening 30 for receiving cooperating with the heating elements electrical contact elements.
  • the deflection regions 28a to 28f serve to connect the respectively adjacent heating elements 26a to 26f and thus to redirect the water. They are U-shaped and each have an inlet section 32a, 32b, a deflection section 34a, 34b and a discharge section 36a, 36b.
  • the inlet sections 32a, 32b and the outlet sections 36a, 36b extend in the longitudinal direction of the housing and in particular coaxially with the heating channels 26a to 26f.
  • the inlet sections 32a, 32b and the outlet sections 36a, 36b have the same length.
  • the deflection portions 34a, 34b are oriented substantially in the transverse direction of the heating channels 26a to 26f.
  • the deflection regions 28a to 28f can be subdivided into lower deflection regions 28b, 28d, 28f and into upper deflection regions 28a, 28c, 28e.
  • the lower deflection regions 28b, 28d, 28f each have a lower deflection cross-section which is equal to or nearly equal to the flow cross-section of the heating channels 26a to 26f. That is, the lower inlet portions 32b, the lower deflection portions 34b, and the lower drainage portions 36b have a uniform constant inner cross-section that is equal to or nearly equal to the flow area of the heating channels 26a to 26f.
  • the upper deflection regions 28a, 28c, 28e and in particular their deflection sections 34a each have an upper deflection cross-section, which is reduced in relation to the flow cross-section of the heating channels 26a to 26f.
  • the inlet sections 32a of the upper deflection regions 28c, 28e which are arranged between two respective heating channels 26b, 26c and 26d, 26e, have a conically tapered inlet cross section, as viewed in the direction of flow
  • the inlet section 32a of the upper deflection region 28a, which is arranged between the flow path 22 and the heating section 16 has a constant inlet cross-section.
  • a cross-sectional reduction to the upper deflection cross-section is not necessary in that than the deflection cross section of the upper deflection section 34a is equal to the flow cross section of the flow path 22.
  • the outlet portions 36a of the upper deflection regions 28a, 28c, 28e and the upper outlet portions 36a are cylindrical and have a constant outlet cross section, which is equal to the upper deflection cross section of the deflection portions 34a.
  • the outlet sections 36a open in a stepped manner into the heating channels 26a, 26c, 26e, whereby an annular surface 38 extending transversely to the flow direction is formed in the transition region.
  • the spout portions 36a preferably have an axial extent of about 10mm to 20mm.
  • FIG. 3 is the in FIG. 2 shown open heating section 16 closed example shown in the region of the upper deflection region 28c.
  • FIG. 3 essential features of the invention figuratively illustrated from another perspective. However, the order used below is not a weighting of the features.
  • the heating channels 26b, 26c have a constant flow area.
  • the upper deflection portion 34a has a deflection cross-section which is reduced from the flow area of the heating channels 26b, 26c.
  • the upper inlet section 32a has a conically reduced inflow cross section, whereby the flow cross section of the heating channel 26b is slowly reduced to the deflection cross section.
  • the upper spout portion 36a has a constant spout cross section equal to the turnaround section of the spool portion 34a.
  • the upper inlet portion 32a and the upper outlet portion 36a are coaxial with the heating channels 26b, 26c and are connected end-to-end with the heating channel 26b and the heating channel 26c, respectively.
  • the deflecting portion 34a is transverse to the heating channels 26b, 26c.
  • the upper inlet portion 32a and the upper outlet portion 36a the same length.
  • the upper outlet portion 36a opens like a step into the heating channel 26c, that a rapid and especially abrupt and thus sudden cross-sectional widening of the upper outlet cross-section 36a and thus the same large upper deflection on the flow cross-section.
  • a heating block for an electric water heater in particular for providing heating water, comprising a housing in which a meandering heating path is formed for heating a liquid having a plurality of heating channels for receiving heating coils and a plurality of U-shaped deflection areas Having deflected the liquid between the respective adjacent heating channels, wherein in installation position, the upper deflection regions have an inlet section for reducing a flow cross-section of the heating channels on a Umlenkquer4.000 and a discharge section, which opens like a step into the respective heating channel, and a water heater.

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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)

Claims (11)

  1. Bloc chauffant pour un chauffe-eau instantané chauffé électriquement, en particulier pour fournir de l'eau chaude, comprenant un boîtier dans lequel est configuré, pour le chauffage d'un liquide, un trajet de chauffe (16) s'étendant en forme de méandres, trajet de chauffe qui présente une multiplicité de canaux de chauffage (26a à 26f) servant à loger des filaments chauffants hélicoïdaux, et une multiplicité de zones de redirection (28a à 28f) en forme de U servant à rediriger le liquide entre les canaux de chauffage (26a à 26f) à chaque fois adjacents, où, en position installée, les zones de redirection supérieures (28c, 28d) ont un tronçon d'entrée (32a) prévu pour la réduction d'une section de passage des canaux de chauffage (26a à 26f), à une section de redirection, ainsi qu'un tronçon de sortie (36a), caractérisé en ce que le tronçon de sortie (36a) débouche de façon étagée dans le canal de chauffage respectif (26a, 26c, 26e).
  2. Bloc chauffant selon la revendication 1, où les tronçons de sortie supérieurs (36a) sont configurés de façon rectiligne.
  3. Bloc chauffant selon la revendication 1 ou 2, où les tronçons de sortie supérieurs (36a) sont orientés de façon coaxiale par rapport au canal de chauffage respectif (26a, 26c, 26e).
  4. Bloc chauffant selon l'une des revendications 1, 2 ou 3, où les tronçons de sortie supérieurs (36a) présentent une section de sortie constante.
  5. Bloc chauffant selon la revendication 4, où la section de sortie supérieure est identique à la section de redirection supérieure.
  6. Bloc chauffant selon l'une quelconque des revendications précédentes, où les tronçons de sortie supérieurs (36a) font environ de 10 mm à 20 mm de long.
  7. Bloc chauffant selon l'une quelconque des revendications précédentes, où les tronçons de sortie supérieurs (36a) et les tronçons d'entrée supérieurs (32a) ont une étendue axiale identique.
  8. Bloc chauffant selon l'une quelconque des revendications précédentes, où les tronçons d'entrée supérieurs (32a, 32b) ont une section d'entrée diminuée de façon conique dans la direction d'écoulement.
  9. Bloc chauffant selon l'une quelconque des revendications précédentes, où les zones de redirection inférieures (28b, 28d, 28f) ont à chaque fois, en position installée, une section de redirection inférieure correspondant à la section de passage.
  10. Bloc chauffant selon l'une quelconque des revendications précédentes, où les zones de redirection (28a à 28f) ont à chaque fois un tronçon de redirection (34a, 34b) définissant la section de redirection supérieure et inférieure, tronçon de redirection qui s'étend, dans la direction transversale des canaux de chauffage (26a à 26f), entre le tronçon d'entrée (32a, 32b) et le tronçon de sortie (36a, 36b).
  11. Chauffe-eau instantané électrique comprenant un bloc chauffant (1) selon l'une quelconque des revendications précédentes.
EP20120182534 2011-09-02 2012-08-31 Bloc de chauffage et chauffe-eau instantané Active EP2565551B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12182534T PL2565551T3 (pl) 2011-09-02 2012-08-31 Blok grzejny i podgrzewacz przepływowy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011082106A DE102011082106A1 (de) 2011-09-02 2011-09-02 Heizblock und Durchlauferhitzer

Publications (2)

Publication Number Publication Date
EP2565551A1 EP2565551A1 (fr) 2013-03-06
EP2565551B1 true EP2565551B1 (fr) 2015-05-20

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EP20120182534 Active EP2565551B1 (fr) 2011-09-02 2012-08-31 Bloc de chauffage et chauffe-eau instantané

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EP (1) EP2565551B1 (fr)
DE (1) DE102011082106A1 (fr)
PL (1) PL2565551T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015216938A1 (de) 2015-09-03 2017-03-09 BSH Hausgeräte GmbH Heizblockhalbschale und Heizblock zur Vermeidung stehender Lufblasen
DE102015216937A1 (de) * 2015-09-03 2017-03-09 BSH Hausgeräte GmbH Heizblockhalbschale und Heizblock mit Führungselementen für eine Heizwendel
DE102022112092A1 (de) 2022-05-13 2023-11-16 Vaillant Gmbh Verfahren zur Herstellung eines elektrischen Heizgerätes und elektrisches Heizgerät

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1301033B (de) * 1965-08-25 1969-08-14 Licentia Gmbh Kanalkoerper fuer einen elektrisch beheizten Durchlauferhitzer
DE8332914U1 (de) * 1983-11-12 1984-02-16 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Elektrisch beheizter durchlauferhitzer
DE3401935C3 (de) * 1983-01-31 1994-05-11 Vaillant Joh Gmbh & Co Elektrisch beheizter Durchlauferhitzer
US4960976A (en) * 1988-07-06 1990-10-02 Creative Capital Corp. Electrical resistance water heater effecting non-lamellar flow to avert cavitation therein
DE29603842U1 (de) * 1996-03-01 1997-03-27 Forbach GmbH, 97616 Bad Neustadt Elektrisch beheizter Durchlauferhitzer
DE19616766C2 (de) * 1996-04-26 2002-03-14 Stiebel Eltron Gmbh & Co Kg Elektrischer Durchlauferhitzer
DE19651085A1 (de) * 1996-12-09 1998-06-10 Bosch Siemens Hausgeraete Durchlauferhitzer mit einem Heizblock
DE19651087C2 (de) * 1996-12-09 2002-06-20 Bsh Bosch Siemens Hausgeraete Heizblock mit Gehäuseschalen
DE29803524U1 (de) * 1998-02-28 1999-07-29 Forbach GmbH, 97616 Bad Neustadt Durchlauferhitzer mit einem blockartigen Kanalkörper aus isolierendem Werkstoff
FI111397B (fi) * 2001-12-12 2003-07-15 Metso Paper Inc Menetelmä ja laite kemikaalin syöttämiseksi kuitususpensioon

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Publication number Publication date
PL2565551T3 (pl) 2015-10-30
DE102011082106A1 (de) 2013-03-07
EP2565551A1 (fr) 2013-03-06

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