EP1544539B1 - Device for evaporating water by means of electric heating - Google Patents

Device for evaporating water by means of electric heating Download PDF

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Publication number
EP1544539B1
EP1544539B1 EP04029412A EP04029412A EP1544539B1 EP 1544539 B1 EP1544539 B1 EP 1544539B1 EP 04029412 A EP04029412 A EP 04029412A EP 04029412 A EP04029412 A EP 04029412A EP 1544539 B1 EP1544539 B1 EP 1544539B1
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EP
European Patent Office
Prior art keywords
water
evaporator
heating element
connection piece
steam
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.)
Not-in-force
Application number
EP04029412A
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German (de)
French (fr)
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EP1544539A1 (en
Inventor
Dietmar Dr.-Ing. Berghänel
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.)
Berghanel Elektrotechnik
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Berghanel Elektrotechnik
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Publication date
Application filed by Berghanel Elektrotechnik filed Critical Berghanel Elektrotechnik
Priority to SI200430672T priority Critical patent/SI1544539T1/en
Priority to PL04029412T priority patent/PL1544539T3/en
Publication of EP1544539A1 publication Critical patent/EP1544539A1/en
Application granted granted Critical
Publication of EP1544539B1 publication Critical patent/EP1544539B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/28Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/287Methods of steam generation characterised by form of heating method in boilers heated electrically with water in sprays or in films

Definitions

  • the invention relates to a device for evaporating water by means of electrical heating, for use in electrical household appliances and power tools, with the drip-free steam is generated in the simplest way.
  • EP 1 026 306 a steam generator with pump for an iron is described. In it, the great design effort is shown, without going into an electrical interconnection of pump and heater.
  • EP 1 151 705 known to regulate the temperature of a steam oven by supplying water to a steam generator arranged in the oven. In it, the process of steam generation is regulated by a complex measuring and evaluation system. This complex and limited to the specific application arrangement is not useful for the simplest solutions,
  • the object of the invention is a device for evaporating water by means of electrical heating, with the simplest way and with a minimum of inexpensive components drop-free steam for use in electrical household appliances and power tools is generated.
  • the advantage of the invention is that in the simplest way with a minimum of components troplenfreier water vapor is generated and the device according to the invention is used as a self-operating component use. Another advantage is that the working temperature is reached quickly due to the low-mass construction of the evaporator and by small dead times when changing the supply voltage and an immediate change in steam power.
  • the device is heated by applying the supply voltage 12 to the heating element 4 at the bottom of the evaporator 2.
  • the regulator contact 1 Upon reaching a specific temperature determined by the regulator contact 1, for example 160 ° C., the regulator contact 1 opens and switches off the heating element 4 from the supply voltage 12. As a result, a large part of the supply voltage 12 is at the regulator contact 1 and the water pump 3 begins to inject water into the water pipe 7 of the evaporator 2 via the suction hose 5 and the connecting hose 6. The water evaporates immediately in the heated evaporator 2 and is available at the steam pipe 8 drop-free as steam at high pressure. In this case, the evaporator 2 cools down and upon reaching a temperature also determined by the regulator contact 1, for example 120 ° C., the regulator contact 1 closes again, the water pump 3 no longer receives the supply voltage 12 and the heating element 4 is heated again. This process is repeated continuously.
  • a specific temperature determined by the regulator contact 1 for example 160 ° C.
  • the supply voltage 12 is completely available when heating the heating element 4 and when pumping water to the water pump 3, a small part of this voltage drops from the heating element 4. However, since the electrical pump resistance is much larger (about one hundred times) than the electrical resistance of the heating element 4, when pumping after
  • the regulator contact 1 is connected in series with the thermal fuse 9 and both are located outside of the hottest point in operation at the bottom of the evaporator 2. At this point, the water to be evaporated from the water nozzle 7 is injected inside the evaporator 2.
  • the housing of the evaporator 2 made of stainless steel sheet is thus massearm and has very short heating times.
  • the case has a volume of about 100 milliliters and is very flat.
  • the diameter of the base is about ten times greater than the height.
  • the shape of the evaporator 2 need not be cylindrical. Although this is technologically advantageous, but other geometries are suitable.
  • the evaporator 2 is inclined by the skew angle 10 to the horizontal. This angle is for example between 5 ° and 10 ° and the Inclination is always such that the water flows to the side of the water nozzle 7, ie the hottest point in operation.
  • a baffle plate 11 in front of the steam pipe 8. This prevents bubbling water from coming out of the steam pipe 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Irons (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Water Treatment By Sorption (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The system to evaporate water by electrical heating, e.g. in domestic appliances and electric tools, has a water pump (3) in parallel with a control contact (1), which switches the power supply (12) to the heating element (4) of the evaporator (2) on and off according to temperature. The opening of the control contact maintains the power supply and water is drawn through a suction tube (5) and a connecting tube (6) into an inflow (7), where water is sprayed on to the hot heating surface of the evaporator. Steam, free of droplets, is available at a high pressure at the steam outflow connection (8).

Description

Die Erfindung betrifft eine Einrichtung zum Verdampfen von Wasser mittels elektrischer Beheizung, zur Anwendung in elektrischen Hausgeräten und Elektrowerkzeugen, mit der auf einfachste Weise tropfenfreier Dampf erzeugt wird.The invention relates to a device for evaporating water by means of electrical heating, for use in electrical household appliances and power tools, with the drip-free steam is generated in the simplest way.

Aus DE 4309240 ist bekannt, in einer beheizten flachen Dose mittels einer Pumpe Wasser zur Dampferzeugung zu dosieren, wobei die Pumpe die zu verdampfende Flüssigkeit in einstellbarer Menge dem temperaturgeregelten Verdampfer zuführt. Nachteilig an dieser Schaltung ist, dass die Pumpenleistung durch einen Vorwiderstand verändert wird und die Inbetriebnahme der Pumpe durch einen zusätzlichen Schalter manuell oder mit nicht näher beschriebenen externen Schaltkomponenten erfolgt.Out DE 4309240 It is known to meter in a heated flat box by means of a pump water for steam generation, the pump feeds the liquid to be evaporated in an adjustable amount to the temperature-controlled evaporator. A disadvantage of this circuit is that the pump power is changed by a series resistor and the commissioning of the pump is done by an additional switch manually or with unspecified external switching components.

In EP 1 026 306 wird ein Dampfgenerator mit Pumpe für ein Bügeleisen beschrieben. Darin ist der große konstruktive Aufwand dargestellt, ohne auf eine elektrische Zusammenschaltung von Pumpe und Heizung einzugehen.In EP 1 026 306 a steam generator with pump for an iron is described. In it, the great design effort is shown, without going into an electrical interconnection of pump and heater.

Es ist auch aus EP 1 151 705 bekannt, die Temperatur eines Dampfbackraumes durch Zuführung von Wasser auf einen im Backraum angeordneten Dampfgenerator zu regeln. Darin wird der Prozess der Dampferzeugung durch ein aufwendiges Mess- und Auswertesystem geregelt. Diese aufwendige und auf den speziellen Anwendungsfall beschränkte Anordnung ist für einfachste Lösungen nicht sinnvoll zu gebrauchen,It is also out EP 1 151 705 known to regulate the temperature of a steam oven by supplying water to a steam generator arranged in the oven. In it, the process of steam generation is regulated by a complex measuring and evaluation system. This complex and limited to the specific application arrangement is not useful for the simplest solutions,

In Espressomaschinen wird kontinuierlich Wasser in einem Verdampfer aus Aluminiumguß zum Kochen und Verdampfen gebracht. Nachteilig an diesem Verfahren ist, dass die Autheizzeit lang ist, der Wasserdampf nicht tropfenfrei zur Verfügung steht, denn für Espressomaschinen gibt es diese Forderung nicht, und Verdampfer aus Aluminium sehr stark zur Bildung von Rückständen neigen.In espresso machines, water is continuously boiled and evaporated in an aluminum casting evaporator. A disadvantage of this method is that the heating time is long, the water vapor is not available drop-free, because for espresso machines, there is this requirement, and evaporators made of aluminum very much prone to the formation of residues.

Aufgabe der Erfindung ist eine Einrichtung zum Verdampfen von Wasser mittels elektrischer Beheizung, mit der auf einfachste Weise und mit einem Minimum an kostengünstigen Komponenten tropfenfreier Wasserdampf zur Anwendung in elektrischen Hausgeräten und Elektrowerkzeugen erzeugt wird.The object of the invention is a device for evaporating water by means of electrical heating, with the simplest way and with a minimum of inexpensive components drop-free steam for use in electrical household appliances and power tools is generated.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Hauptanspruchs gelöst. Ausgestaltungen der Erfindung sind in den Unteransprüchen dargestellt.According to the invention the object is achieved by the features of the main claim. Embodiments of the invention are shown in the subclaims.

Der Vorteil der Erfindung besteht darin, dass auf einfachste Weise mit einem Minimum an Komponenten troplenfreier Wasserdampf erzeugt wird und die erfindungsgemäße Einrichtung als selbständig arbeitende Komponente Verwendung findet. Ein weiterer Vorteil ist, dass durch den massearmen Aufbau des Verdampfers die Arbeitstemperatur schnell erreicht ist und durch kleine Totzeiten bei Änderung der Versorgungsspannung auch eine sofortige Änderung der Dampfleistung erfolgt.The advantage of the invention is that in the simplest way with a minimum of components troplenfreier water vapor is generated and the device according to the invention is used as a self-operating component use. Another advantage is that the working temperature is reached quickly due to the low-mass construction of the evaporator and by small dead times when changing the supply voltage and an immediate change in steam power.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles näher erläutert.The invention will be explained in more detail with reference to an embodiment.

Die dazugehörigen Zeichnungen zeigen in

Fig. 1:
die prinzipielle Zusammenschaltung der einzelnen Bauteile in der Seitenansicht,
Fig. 2:
die prinzipielle Zusammenschaltung der einzelnen Bauteile in der Ansicht von unten.
The accompanying drawings show in
Fig. 1:
the principle interconnection of the individual components in the side view,
Fig. 2:
the principle interconnection of the individual components in the view from below.

Die Einrichtung wird durch Anlegen der Versorgungsspannung 12 mit dem Heizelement 4 am Boden des Verdampfers 2 aufgeheizt.The device is heated by applying the supply voltage 12 to the heating element 4 at the bottom of the evaporator 2.

Beim Erreichen einer durch den Reglerkontakt 1 bestimmten Temperatur, zum Beispiel 160° C, öffnet der Reglerkontakt 1 und schaltet das Heizelement 4 von der Versorgungsspannung 12 ab. In Folge liegt ein großer Teil der Versorgungsspannung 12 an dem Reglerkontakt 1 und die Wasserpumpe 3 beginnt über den Ansaugschlauch 5 sowie den Verbindungsschlauch 6 Wasser in den Wasserstutzen 7 des Verdampfers 2 zu spritzen. Das Wasser verdampft in dem aufgeheizten Verdampfer 2 sofort und steht am Dampfstutzen 8 tropfenfrei als Dampf mit hohem Druck zur Verfügung. Dabei kühlt der Verdampfer 2 ab und beim Erreichen einer ebenfalls durch den Reglerkontakt 1 bestimmten Temperatur zum Beispiel 120° C, schließt der Reglerkontakt 1 wieder, die Wasserpumpe 3 erhält die Versorgungsspannung 12 nicht mehr und das Heizelement 4 wird erneut beheizt. Dieser Vorgang wiederholt sich laufend.Upon reaching a specific temperature determined by the regulator contact 1, for example 160 ° C., the regulator contact 1 opens and switches off the heating element 4 from the supply voltage 12. As a result, a large part of the supply voltage 12 is at the regulator contact 1 and the water pump 3 begins to inject water into the water pipe 7 of the evaporator 2 via the suction hose 5 and the connecting hose 6. The water evaporates immediately in the heated evaporator 2 and is available at the steam pipe 8 drop-free as steam at high pressure. In this case, the evaporator 2 cools down and upon reaching a temperature also determined by the regulator contact 1, for example 120 ° C., the regulator contact 1 closes again, the water pump 3 no longer receives the supply voltage 12 and the heating element 4 is heated again. This process is repeated continuously.

Die Versorgungsspannung 12 steht beim Heizen am Heizelement 4 ganz zur Verfügung und beim Wasserpumpen an der Wasserpumpe 3 fällt ein kleiner Teil dieser Spannung am Heizelement 4 ab. Da aber der elektrische Pumpenwiderstand sehr viel größer ist (ungefähr einhundert mal) als der elektrische Widerstand des Heizelementes 4, liegt beim Pumpen nach derThe supply voltage 12 is completely available when heating the heating element 4 and when pumping water to the water pump 3, a small part of this voltage drops from the heating element 4. However, since the electrical pump resistance is much larger (about one hundred times) than the electrical resistance of the heating element 4, when pumping after

Spannungsteilerregel trotzdem ein großer Teil der Versorgungsspannung 12 an der Wasserpumpe 3 an.Voltage divider rule anyway a large part of the supply voltage 12 to the water pump 3.

Zur Sicherheit ist der Reglerkontakt 1 mit der Thermosicherung 9 in Reihe geschaltet und beide befinden sich außen an der im Betrieb heißesten Stelle am Boden des Verdampfers 2. Auf diese Stelle wird auch innen im Verdampfer 2 das zu verdampfende Wasser aus dem Wasserstutzen 7 gespritzt.For safety, the regulator contact 1 is connected in series with the thermal fuse 9 and both are located outside of the hottest point in operation at the bottom of the evaporator 2. At this point, the water to be evaporated from the water nozzle 7 is injected inside the evaporator 2.

Vorteilhafterweise besteht das Gehäuse des Verdampfers 2 aus Edelstahlblech, ist damit massearm und hat sehr kurze Aufheizzeiten. Das Gehäuse hat ein Volumen von ungefähr 100 Milliliter und ist sehr flach ausgebildet. Der Durchmesser der Grundfläche ist ungefähr zehn mal größer als die Höhe. Die Form des Verdampfers 2 muß nicht zylindrisch sein. Das ist zwar technologisch vorteilhaft, es sind aber auch andere Geometrien geeignet. In einer vorteilhaften Ausgestaltung der Erfindung ist der Verdampfer 2 um den Schrägstellungswinkel 10 zur Horizontalen geneigt. Dieser Winkel ist zum Beispiel zwischen 5° und 10° und die Neigung ist immer so, dass das Wasser auf die Seite des Wasserstutzens 7, also auf die im Betrieb heißeste Stelle, fließt.Advantageously, the housing of the evaporator 2 made of stainless steel sheet, is thus massearm and has very short heating times. The case has a volume of about 100 milliliters and is very flat. The diameter of the base is about ten times greater than the height. The shape of the evaporator 2 need not be cylindrical. Although this is technologically advantageous, but other geometries are suitable. In an advantageous embodiment of the invention, the evaporator 2 is inclined by the skew angle 10 to the horizontal. This angle is for example between 5 ° and 10 ° and the Inclination is always such that the water flows to the side of the water nozzle 7, ie the hottest point in operation.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung befindet sich im Inneren des Verdampfers 2 ein Prallblech 11 vor dem Dampfstutzen 8. Damit wird verhindert, dass sprudelndes Wasser aus dem Dampfstutzen 8 herauskommt.In a further advantageous embodiment of the invention is located inside the evaporator 2, a baffle plate 11 in front of the steam pipe 8. This prevents bubbling water from coming out of the steam pipe 8.

Es ist auch vorteilhaft, dass die Dampfmenge auf einfachste Weise nur durch Verändern der Versorgungsspannung 12 erfolgt, denn mit der elektrischen Leistung des Heizelementes 4 ändern sich auch die Schaltzeiten des Reglerkontaktes 1 und damit die Intervalle der Dampferzeugung.It is also advantageous that the amount of steam in the simplest way only by changing the supply voltage 12, because with the electrical power of the heating element 4, the switching times of the regulator contact 1 and thus the intervals of the steam generation change.

Claims (9)

  1. Device for the evaporation of water by means of electrical heating, containing an evaporator, a controller and a water pump, the water pump (3) being connected in parallel to the controller contact (1) of the controller, characterized in that the water pump receives its supply voltage as a result of the opening of the controller contact (1) at a defined temperature and sprays water via a suction-intake hose (5) and a connecting hose (5) into a water connection piece (7) of the dry-heated evaporator (2), so that drop-free stream is available at high pressure at a steam connection piece (8).
  2. Device according to Claim 1, characterized in that the heating element (4) is located on the bottom of the evaporator (2).
  3. Device according to Claims 1 and 2, characterized in that a thermal fuse (9) and the controller contact (1) are located on the bottom of the evaporator (2) in that region of the heating element (4) which is hottest during operation.
  4. Device according to Claims 1 to 3, characterized in that the water connection piece (7) is located above that region of the heating element (4) which is hottest during operation.
  5. Device according to one of Claims 1 to 4, characterized in that the evaporator (2) is inclined at an angle of inclination (10) of between 5° and 10° such that the water in the evaporator (2) runs onto the side where the junction of the water connection piece (7) is located.
  6. Device according to Claims 1 to 5, characterized in that, in the inner region of the evaporator (2), a baffle plate (11) prevents the emergence of bubbling water at the steam connection piece (8).
  7. Device according to Claims 1 to 6, characterized in that the steam quantity generated can be set via the electrical power of the heating element (4) by a variation of the supply voltage (12).
  8. Device according to Claims 1 to 7, characterized in that the housing of the evaporator (2) consists, with low mass, of high-grade sheet steel with a volume of approximately 100 millilitres and the diameter of its base area is approximately ten times greater than its height.
  9. Device according to one of Claims 1 to 8, characterized in that the electrical resistance of the water pump (3) is very much higher than the electrical resistance of the heating element (4).
EP04029412A 2003-12-15 2004-12-11 Device for evaporating water by means of electric heating Not-in-force EP1544539B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200430672T SI1544539T1 (en) 2003-12-15 2004-12-11 Device for evaporating water by means of electric heating
PL04029412T PL1544539T3 (en) 2003-12-15 2004-12-11 Device for evaporating water by means of electric heating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358940A DE10358940B3 (en) 2003-12-15 2003-12-15 Water evaporator, for domestic appliances and electric tools, has a control contact working on temperature to deliver a water spray to a heated surface to generate steam at a high pressure free of droplets
DE10358940 2003-12-15

Publications (2)

Publication Number Publication Date
EP1544539A1 EP1544539A1 (en) 2005-06-22
EP1544539B1 true EP1544539B1 (en) 2008-01-23

Family

ID=34485409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04029412A Not-in-force EP1544539B1 (en) 2003-12-15 2004-12-11 Device for evaporating water by means of electric heating

Country Status (7)

Country Link
EP (1) EP1544539B1 (en)
AT (1) ATE384915T1 (en)
DE (2) DE10358940B3 (en)
DK (1) DK1544539T3 (en)
ES (1) ES2300697T3 (en)
PL (1) PL1544539T3 (en)
SI (1) SI1544539T1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101041077B1 (en) * 2006-09-28 2011-06-13 삼성전자주식회사 Steam generator and heating cooker having the same
WO2008044180A2 (en) * 2006-10-09 2008-04-17 Koninklijke Philips Electronics N.V. Steam generator having a hot surface and means for spraying water on the hot surface
DE202007014365U1 (en) 2007-10-12 2009-02-19 Berghänel, Dietmar, Dr.-Ing. Device for evaporating water with safety function
DE102008022837A1 (en) 2008-05-08 2009-11-12 Berghänel, Dietmar, Dr. Ing. Electrically-heated evaporator for water containing lime has injection nozzle in upper third of evaporator linked to injection hose, directly above temperature regulator
CN103697448A (en) * 2012-09-27 2014-04-02 高耀宗 Household electric heating type vaporization converter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582028A1 (en) * 1985-05-20 1986-11-21 Brenot Claude Ironing appliance with direct evaporation
DE4309240A1 (en) * 1993-03-23 1994-09-29 Ego Elektro Blanc & Fischer Steam generator with an evaporating chamber
DE4312793C2 (en) * 1993-04-20 1995-04-27 Devilbiss Medizinische Produkt Device for providing warm humidified breathing gas
IT1311200B1 (en) * 1999-02-01 2002-03-04 Euro Star Srl STEAM GENERATOR FOR CLEANING MACHINES, IRON, MACHINES FOR COFFEE AND SIMILAR.
FR2808579B1 (en) * 2000-05-05 2002-08-23 Brandt Cooking METHOD FOR REGULATING TEMPERATURE IN A STEAM OVEN

Also Published As

Publication number Publication date
DE10358940B3 (en) 2005-06-09
DE502004006032D1 (en) 2008-03-13
DK1544539T3 (en) 2008-05-26
PL1544539T3 (en) 2008-07-31
ES2300697T3 (en) 2008-06-16
SI1544539T1 (en) 2008-06-30
EP1544539A1 (en) 2005-06-22
ATE384915T1 (en) 2008-02-15

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