AT401842B - ELECTRICALLY HEATED CONTINUOUS WATER HEATER - Google Patents

ELECTRICALLY HEATED CONTINUOUS WATER HEATER Download PDF

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Publication number
AT401842B
AT401842B AT0061688A AT61688A AT401842B AT 401842 B AT401842 B AT 401842B AT 0061688 A AT0061688 A AT 0061688A AT 61688 A AT61688 A AT 61688A AT 401842 B AT401842 B AT 401842B
Authority
AT
Austria
Prior art keywords
heating resistors
water
water heater
load switch
switch
Prior art date
Application number
AT0061688A
Other languages
German (de)
Other versions
ATA61688A (en
Original Assignee
Vaillant Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vaillant Gmbh filed Critical Vaillant Gmbh
Priority to AT0061688A priority Critical patent/AT401842B/en
Priority to DE3906829A priority patent/DE3906829A1/en
Publication of ATA61688A publication Critical patent/ATA61688A/en
Application granted granted Critical
Publication of AT401842B publication Critical patent/AT401842B/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
    • 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
    • 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
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

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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)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)

Description

AT 401 842 BAT 401 842 B

Die Erfindung betrifft einen elektrisch beheizten Durchlauf-Wasserheizer gemäß den Merkmalen des Oberbegriffes des Patentanspruches.The invention relates to an electrically heated once-through water heater according to the features of the preamble of the claim.

Ein elektrischer Durchlauf-Wasserheizer mit zwei Leistungsstufen ist aus der DE-AS 12 32 674 bekannt. Dabei sind beheizte und nicht beheizte Abschnitte des Wasserweges vorgesehen. 5 Aufgabe der Erfindung ist es, einen Durchlauf-Wasserheizer der eingangs bezeichneten Gattung mit vier Leistungsstufen und mehreren Heizwiderständen so zu gestalten, daß sich diese Widerstände raumsparend und günstig innerhalb eines kompakten Heizblockes unterbringen lassen.An electric water heater with two power levels is known from DE-AS 12 32 674. Heated and non-heated sections of the waterway are provided. 5 The object of the invention is to design a once-through water heater of the aforementioned type with four power levels and several heating resistors in such a way that these resistors can be accommodated in a compact and economical manner in a compact heating block.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruches gelöst. io Diese erfindungsgemäße Lösung erschließt die Möglichkeit einer sehr raumsparenden Anordnung der vier Heizwiderstände innerhalb eines von einem Heizblock gebildeten, von dem zu beheizenden Wasser durchströmten Wasserweges unter Vermeidung der Ausbildung unbeheizter Abschnitte.According to the invention, this object is achieved by the characterizing features of the patent claim. This solution according to the invention opens up the possibility of a very space-saving arrangement of the four heating resistors within a water path formed by a heating block and through which the water to be heated flows, while avoiding the formation of unheated sections.

Ein Ausführungsbeispiel des Erfindungsgegenstandes ist nachstehend an Hand der Zeichnungen erläutert. ?5 In diesen Zeichnungen zeigen im einzelnenAn embodiment of the subject matter of the invention is explained below with reference to the drawings. ? 5 These drawings show in detail

Fig.1 das Prinzip der erfindungsgemäßen Lösung an Hand einer Schaltung und1 shows the principle of the solution according to the invention using a circuit and

Fig.2 die Anordnung der Widerstände mit dieser Schaltung im Wasserweg eines Wasserheizers.2 shows the arrangement of the resistors with this circuit in the water path of a water heater.

Bei dieser Schaltung nach Fig. 1 sind die Drehstrom-Außenleiter mit 1, 2 und 3 bezeichnet und die diesen Außenleitern 1 bis 3 zugeordneten, von einem Wasserschalter betätigbaren Schaltkontakte mit 4, 5 20 und 15. Bei bloß geringem Wasserdurchsatz werden nur die Schaltkontakte 4 und 15, bei größerem Wasserdurchsatz auch der Kontakt 5 zusätzlich geschlossen.In this circuit according to FIG. 1, the three-phase outer conductors are designated 1, 2 and 3 and the switch contacts associated with these outer conductors 1 to 3, which can be actuated by a water switch, are designated with 4, 5, 20 and 15. With only a low water throughput, only the switch contacts 4 and 15, the contact 5 is also closed when the water flow is greater.

Ein manuell und willkürlich betätigbarer Teillast-Schalter 6 befindet sich in einer vom Außenleiter 1 über einen Heizwiderstand 7 zum Außenleiter 3 führenden Leitung 8, die über einen Heizwiderstand 9 führt, wogegen Heizwiderstände 10 und 11 parallel an den Außenleiter 2 angeschlossen und vom Teillast-Schalter 25 6 überbrückbar sind.A manually and arbitrarily operable part-load switch 6 is located in a line 8 leading from the outer conductor 1 via a heating resistor 7 to the outer conductor 3, which leads via a heating resistor 9, whereas heating resistors 10 and 11 are connected in parallel to the outer conductor 2 and from the part-load switch 25 6 can be bridged.

Der Heizwiderstand 10 befindet sich in einer Zweigleitung 12, die im Sternpunkt 20 vor dem Teillast-Schalter 6 von der Leitung 8 abzweigt und in die zum Außenleiter 2 führende Leitung 13 mündet; der Heizwiderstand 11 befindet sich hinter dem Teillast-Schalter 6 in dieser Leitung 13.The heating resistor 10 is located in a branch line 12 which branches off from the line 8 in the star point 20 in front of the part-load switch 6 and opens into the line 13 leading to the outer conductor 2; the heating resistor 11 is located behind the part-load switch 6 in this line 13.

Die Heizwiderstände 7, 9, 10 und 11 sind Blankdrahtwendel und sind paarweise gleich groß. Die so Heizwiderstände 7 und 9 erzeugen bei Anlegen der Spannung das Doppelte, beispielsweise 7 KW, der Heizwiderstände 10 und 11, die beispielsweise 3,5 KW erzeugen. Alle Heizwiderstände gemeinsam bilden eine Kette 16 (Fig.2), deren Anfang und Ende an die beiden Außenleiter 1 und angeschlossen ist. Der Kettenmittelpunkt 17 ist an den Außenleiter 2 angeschlossen.The heating resistors 7, 9, 10 and 11 are bare wire coils and are the same size in pairs. The heating resistors 7 and 9 thus produce twice, for example 7 KW, of the heating resistors 10 and 11 which generate, for example, 3.5 KW when the voltage is applied. All heating resistors together form a chain 16 (Fig.2), the beginning and end of which are connected to the two outer conductors 1 and. The chain center 17 is connected to the outer conductor 2.

Die beiden, die größere elektrische Leistung abgebenderi Heizwiderstände 7 und 9 liegen an den 35 Enden der Kette 16, die beiden anderen, 10 und 11, im Mittelpunkt 17 und sind vom Teillastschalter 6 überbrückbar. Alle Heizwiderstände 7,9,10 und 11 sind gemäß Fig.2 in einem Wasserweg 14 so angeordnet, daß sie vom gesamten durchströmenden Wasser nacheinander umspült werden. In der Praxis sind in einem Kunststoff-Heizblock zueinander parallele Kanalabschnitte über Umlenkungen zu einem durchgehenden Wasserweg verbunden. 40 Die Größe der Heizwiderstände 7, 9, 10 und 11 ist beispielsweise so gewählt, daß sich bei Vollast (alle Kontakte 4, 5 und 15 des Wasserschalters und Teillast-Schalter 6 geschlossen) folgende Werte für die Leistungen der Widerstände ergeben:The two heating resistors 7 and 9 which deliver the greater electrical power are located at the 35 ends of the chain 16, the other two, 10 and 11, in the center 17 and can be bridged by the part-load switch 6. All of the heating resistors 7, 9, 10 and 11 are arranged in a water path 14 in accordance with FIG. 2 such that they are washed around by the water flowing through them in succession. In practice, duct sections parallel to each other are connected in a plastic heating block via deflections to form a continuous waterway. 40 The size of the heating resistors 7, 9, 10 and 11 is chosen, for example, so that the following values result for the power of the resistors at full load (all contacts 4, 5 and 15 of the water switch and part-load switch 6 closed):

P7 = 7 KW P9 = 7 KWP7 = 7 KW P9 = 7 KW

45 P, o = 3,5 KW45 P, o = 3.5 KW

P,, = 3,5 KWP ,, = 3.5 KW

Die Gesamtleistung beträgt somit 21 KW.The total output is therefore 21 KW.

Nimmt der Wasserdurchsatz ab, öffnet der Kontakt 5 des Wasserschalters, die Leistung errechnet sich dann wie folgt; so P7 = 5,25 KW P9 = 0If the water flow decreases, the contact 5 of the water switch opens, the output is then calculated as follows; so P7 = 5.25 KW P9 = 0

P10 = 2,625 KW P,, = 2,625 KWP10 = 2.625 KW P ,, = 2.625 KW

Die Gesamtleistung beträgt somit 10,5 KW. 55 Wird bei auf Teillast geschaltetem Teillast-Schalter 6 der volle Wasserdurchsatz verlangt, stellt sich die Leistung wie folgt dar:The total output is 10.5 KW. 55 If full water flow is required when the part-load switch 6 is switched to part-load, the output is as follows:

P7 = 2,33 KW P9 = 2,33 KW 2P7 = 2.33 KW P9 = 2.33 KW 2

Claims (1)

AT 401 842 B pI0 = 4,67 KW P, i = 4,67 KW Die Gesamtleistung beträgt somit 14 KW. Bei betätigtem Teillast-Schalter und geringem Wasserdurchsatz lauten die Leistungen P7 = 2.33 KW P9 = 0 P, o = 4,67 KW P1: = 0 Die Gesamtleistung beträgt somit 7 KW. Patentansprüche 1. Elektrisch beheizter Durchlauf-Wasserheizer mit mehreren Heizwiderständen in Sternschaltung, die über Schaltkontakte eines Wasserschalters an Außenleiter eines Drehstromnetzes angeschlossen sind, sowie mit einem zur wahlweisen Einschaltung einer Teillast dienenden Teillastschalter, dadurch gekennzeichnet, daß vier Heizwiderstände (7, 9, 10 und 11) vorgesehen sind, welche innerhalb des Wasserweges in einer zwischen zwei Aussenleitern (1 und 3) angeschlossenen Kette (16) angeordnet sind, wobei die beiden außenliegenden Heizwiderstände (7 und 9) untereinander gleich groß und doppelt so groß wie die beiden innenliegenden, ebenfalls untereinander gleich großen Heizwiderstände (10 und 11) sind, der Teillastschalter (6) mit einem Punkt an den Sternpunkt (20) der Sternschaltung anliegend die innenliegenden Heizwiderstände (10 und 11) überbrückt und der dritte Außenleiter (2) mit einem Kettenmittelpunkt (17) zwischen den beiden inneniiegenden Heizwiderständen (10 und 11) verbunden ist. Hiezu 1 Blatt Zeichnungen 3AT 401 842 B pI0 = 4.67 KW P, i = 4.67 KW The total output is 14 KW. When the partial load switch is actuated and the water flow is low, the outputs are P7 = 2.33 KW P9 = 0 P, o = 4.67 KW P1: = 0 The total output is 7 KW. 1. Electrically heated once-through water heater with several heating resistors in star connection, which are connected via switching contacts of a water switch to the outer conductor of a three-phase network, as well as with a partial load switch for optionally switching on a partial load, characterized in that four heating resistors (7, 9, 10 and 11) are provided, which are arranged within the waterway in a chain (16) connected between two outer conductors (1 and 3), the two external heating resistors (7 and 9) being the same size and twice as large as the two internal ones, likewise are identical heating resistors (10 and 11), the part-load switch (6) bridges the internal heating resistors (10 and 11) with a point adjacent to the star point (20) of the star connection and the third outer conductor (2) with a chain center (17) between the two internal heating resistors n (10 and 11) is connected. With 1 sheet of drawings 3
AT0061688A 1988-03-09 1988-03-09 ELECTRICALLY HEATED CONTINUOUS WATER HEATER AT401842B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT0061688A AT401842B (en) 1988-03-09 1988-03-09 ELECTRICALLY HEATED CONTINUOUS WATER HEATER
DE3906829A DE3906829A1 (en) 1988-03-09 1989-03-03 ELECTRICALLY HEATED CONTINUOUS WATER HEATER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0061688A AT401842B (en) 1988-03-09 1988-03-09 ELECTRICALLY HEATED CONTINUOUS WATER HEATER

Publications (2)

Publication Number Publication Date
ATA61688A ATA61688A (en) 1996-04-15
AT401842B true AT401842B (en) 1996-12-27

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ID=3495309

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0061688A AT401842B (en) 1988-03-09 1988-03-09 ELECTRICALLY HEATED CONTINUOUS WATER HEATER

Country Status (2)

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AT (1) AT401842B (en)
DE (1) DE3906829A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504470B4 (en) * 1995-02-10 2004-03-04 BSH Bosch und Siemens Hausgeräte GmbH Electric instantaneous water heater

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232674B (en) * 1960-09-09 1967-01-19 Alfred Eckerfeld Electric instant water heater

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1234882B (en) * 1959-11-19 1967-02-23 Licentia Gmbh Electrically heated instantaneous water heater
DE1615417B2 (en) * 1967-10-17 1973-02-15 Siemens Electrogerate GmbH, 1000 Ber linu 8000 München ELECTRIC RUNNING HEATER
DE2941330C2 (en) * 1979-10-11 1986-10-02 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Electric hot water heaters, in particular instantaneous water heaters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1232674B (en) * 1960-09-09 1967-01-19 Alfred Eckerfeld Electric instant water heater

Also Published As

Publication number Publication date
ATA61688A (en) 1996-04-15
DE3906829A1 (en) 1989-09-21
DE3906829C2 (en) 1993-07-29

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RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties
ELJ Ceased due to non-payment of the annual fee