EP0618403A2 - Arrangement d'électrodes pour le réservoir d'une chaudière à vapeur - Google Patents

Arrangement d'électrodes pour le réservoir d'une chaudière à vapeur Download PDF

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Publication number
EP0618403A2
EP0618403A2 EP94810171A EP94810171A EP0618403A2 EP 0618403 A2 EP0618403 A2 EP 0618403A2 EP 94810171 A EP94810171 A EP 94810171A EP 94810171 A EP94810171 A EP 94810171A EP 0618403 A2 EP0618403 A2 EP 0618403A2
Authority
EP
European Patent Office
Prior art keywords
evaporation vessel
plug
electrode
electrodes
bushings
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.)
Granted
Application number
EP94810171A
Other languages
German (de)
English (en)
Other versions
EP0618403B1 (fr
EP0618403A3 (fr
Inventor
Heiner Grieder
Marcel Mössner
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.)
Axair AG
Original Assignee
Condair AG
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 Condair AG filed Critical Condair AG
Publication of EP0618403A2 publication Critical patent/EP0618403A2/fr
Publication of EP0618403A3 publication Critical patent/EP0618403A3/fr
Application granted granted Critical
Publication of EP0618403B1 publication Critical patent/EP0618403B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/025—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using electrical heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/30—Electrode boilers

Definitions

  • the invention relates to an electrode arrangement for an evaporation vessel of an electrode evaporator and an evaporation vessel for an electrode evaporator, with an electrode arrangement which comprises at least two electrodes held in the vessel wall and electrically connectable from outside the evaporation vessel.
  • Electrode evaporators are called steam generators, in which a single or multi-phase alternating current is passed through the water via two or more electrodes and the water itself is used as a heating resistor for generating the heat required for the evaporation. They are mainly used in air humidifiers for ventilation and air conditioning systems or for direct room humidification.
  • the devices and especially the evaporation vessels must be designed very differently (especially with regard to number, shape and arrangement of the electrodes).
  • the course of the electrical field can be influenced by inserting a blind electrode, that is to say an electrically conductive, but not electrically connected part or possibly connected to a neutral conductor, into the electrode arrangement, as the person skilled in the art will immediately recognize.
  • a blind electrode that is to say an electrically conductive, but not electrically connected part or possibly connected to a neutral conductor
  • the mode of operation of the electric field can be adapted to different requirements, so that the other (active) electrodes have to be adjusted less or not at all. This means that only a few types of electrodes are required to cover a wide range of devices.
  • the dummy electrode in the center of the electrode arrangement, more precisely, coaxially to the central axis of symmetry of the arrangement formed by the other electrodes.
  • a hollow cylinder is proposed for the dummy electrode; in principle, however, any shapes, depending on the intended use, are also conceivable.
  • leakage current Another problem, also known to the person skilled in the art under the term “leakage current”, can be solved in a simple manner with a dummy electrode. If the dummy electrode is arranged in such a way that it electrically shields the area near the water inlet or outlet, for example with its lower section, this prevents the formation of electrical potential differences in this area that would otherwise occur when (electrical conductive) water can generate an undesirable and dangerous electrical current in the draining water.
  • a number of bushings are provided in which an electrode can be held by means of a special plug-in part.
  • the plug-in part is provided with a locking device which, on the one hand, automatically locks the plug-in part inserted into a bushing and, on the other hand, can be released again without tools if the plug-in part or the electrode is to be removed again.
  • This design also enables the electrodes to be quickly installed and closed dismantle, and represents a significant simplification compared to the conventional design, in which the electrodes are firmly inserted in the evaporation vessel, often injected directly into the vessel wall or then screwed tight.
  • suitable electrodes are mounted in a suitable position and position by means of plug-in parts inserted in appropriately selected bushings.
  • plug-in parts inserted in appropriately selected bushings.
  • a certain variability is achieved if only one of the electrodes can be mounted in this way; in a preferred embodiment, however, all electrodes are held in one or more of the bushings by means of the plug-in parts mentioned. Unused bushings can be closed with additional plug-in parts.
  • different rotational positions can be provided for the same electrode, for example a) bent against the vessel wall and b) away from it.
  • positioning means which cooperate on the plug-in part and on the evaporation vessel.
  • Such positioning means can consist, for example, in a special shape of the cross-sectional contour of the feedthrough and plug-in part or can also be realized with positioning cams and corresponding recesses for receiving the positioning cams in the other part.
  • the evaporation vessel 2 consists of a lower part 6, in the bottom of which a water inlet or outlet 8 is arranged, and a lid 10 with a steam outlet 12. Also shown are support feet 14 formed on the lower part, on which the lower part is used during assembly or maintenance work can be set up free-standing.
  • a number of bushings are formed in the cover 10, four of which are designated 16.1 closer to the edge and three designated 16.2 closer to the center of the cover.
  • Plug-in parts 18 can be inserted into these bushings 16.1 or 16.2, by means of which electrodes can be held in the cover 10, as will be described in more detail below.
  • FIG. 3 shows an arrangement of three electrodes, consisting of two electrodes 22 of the same type, which are "real" in the usual sense, that is to say electrodes which are connected to a supply voltage during operation, and an electrode 24 which is designed as a dummy electrode.
  • Another electrode 22, which would be arranged towards the viewer, is omitted in the figure (cf. FIG. 11).
  • the dummy electrode 24 is not connected to a supply voltage, but is kept electrically insulated in the wall of the evaporation vessel 2, or is optionally connected to a neutral conductor. It serves to a certain extent passively to influence the electric field generated by the active electrodes 22.
  • each electrode 22 consists of a rod 20 and an electrode body 22.1 fastened thereon, and the electrode 24 consists of two rods 20 and an electrode body 24.1 fastened to these rods.
  • Both the rods 20 and the electrode bodies 22.1 and 24.1 are made of an electrically conductive material, preferably metal. All electrodes are held in the cover 10 by means of plug-in parts, which are each fastened to one of the rods 20, specifically the electrodes 22 in bushings 16.1 and the dummy electrode 24 in bushings 16.2.
  • holding elements 26 can be provided which are attached, for example integrally formed, to a sieve 28 which is usually present anyway and is arranged at the bottom in the evaporation vessel.
  • the holding elements 26 are sleeves formed, in which the lower ends of the rods 20 are inserted.
  • the details of implementation 16.1 or 16.2 and plug-in part 18 can best be seen in FIGS. 5 to 8.
  • the bushings 16.1, 16.2 are of essentially the same design, so that the same plug-in part can be used in both. They have a circular cross section and are surrounded by annular guide flanges 30 and 32, which support the plug-in part 18 laterally.
  • the contour of the plug-in part 18 is adapted to the bushing 16.1 or 16.2 and the guide flanges 30, 32 in a closely fitting manner. 34 with a sealing ring is designated. If an electrode is to be held by means of a plug-in part 18, it is firmly attached to the plug-in part.
  • the rod 20 extends for this purpose through a central bore in the plug-in part 18; the upper end of the rod can thus simultaneously serve as an electrical connecting pin for a connecting plug 36.
  • a latching device which is able to hold the plug-in part 18 automatically latching in one of the bushings 16.1, 16.2, it has two elastically flexible tongues 38, which are provided with a latching cam 40 at their free end.
  • the locking cam 40 is tapered in the direction of insertion and has a locking projection 42 which, when the plug-in part is inserted, engages behind a locking edge 44, here the edge of the guide flange 30. If a plug-in part 18 is inserted into one of the bushings 16.1, 16.2, the tongues 38 run with their wedge surfaces on the edge of the bushing and are thereby bent inward so far, that the plug-in part can be retracted further into its end position.
  • the length of the tongues 38 is selected so that the latching cam 40 is exposed again exactly in the end position, thus being pushed outwards by the elasticity of the tongues 38 and engaging behind the latching edge 44.
  • the two tongues 38 can be pressed against one another at their projecting ends, for example with two fingers, until the catch is released and the plug-in part can be pulled out.
  • the connector plug 36 can also advantageously be used to secure the tongues 38 in their latching position.
  • positioning cams 46 are provided on the plug-in part 18 and corresponding slot-shaped recesses 48 are provided in the guide flange 32.
  • the positioning cams 46 and recesses 48 form interacting positioning means which ensure that the plug-in part 18 can only be inserted into one of the bushings 16.1, 16.2 in certain axial orientations.
  • the plug-in part 18 can only be plugged in in two positions, which differ by a rotation through 180 ° about the main axis of the plug-in part.
  • FIGS. 9 to 12 Four examples are given in FIGS. 9 to 12 to illustrate the various possibilities which the invention offers in order to implement different electrode arrangements in the same evaporation vessel with only a few electrode types.
  • the position of the rods 20 each correspond to a position of the bushings 16.1 and 16.2, which can best be seen in FIG. 2.
  • the arrangement in Figure 9 is for two-phase Alternating current is used and comprises two electrodes 22 and a dummy electrode 24, both of the type as already described above with reference to FIG. 3.
  • the arrangement in FIG. 10 is suitable for three-phase alternating current; it consists of three electrodes 22 which, in contrast to FIG. 9, are oriented inwardly curved.
  • FIG. 11 shows the arrangement of FIG. 10, supplemented by a dummy electrode 24.
  • Electrodes 22 Two possible positions are indicated for the electrodes 22, one bent inwards and one outwards.
  • the arrangement can be adapted to different steam outputs by suitable choice of the position of the electrodes.
  • an arrangement with completely different electrodes is shown in FIG. These are three large-area electrodes 50, as are used for so-called fully demineralized water.
  • connection between the lower part 6 and the lid 10 of the evaporation vessel 2 is implemented in the manner of a bayonet catch.
  • the bayonet catch is formed by a number of first, outwardly projecting cams 52 on the lower part 6 and a corresponding number of second, inwardly projecting cams 54 on an annular web 56 of the cover which overlaps the edge of the lower part and the first cams 52.
  • the cams 52 and 54 have run-on surfaces 58 and 60, which face one another when the cover is in place and are slightly inclined with respect to the closure plane, so that by rotating the cover relative to the Lower part the two parts are moved towards each other until the edge of the lower part 6 is pressed against a sealing ring 62 inserted in the cover 10 and the closure is firmly seated.
  • Two laterally formed ribs 64 and 66 on the web 56 and on the lower part 6 form an additional stop for the closing rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Humidification (AREA)
  • Discharge Heating (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Electrostatic Separation (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP94810171A 1993-03-23 1994-03-21 Récipient pour une chaudière à électrodes Expired - Lifetime EP0618403B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00879/93A CH686976A5 (de) 1993-03-23 1993-03-23 Verdampfungsvorrichtung fuer einen Elektrodenverdampfer.
CH879/93 1993-03-23

Publications (3)

Publication Number Publication Date
EP0618403A2 true EP0618403A2 (fr) 1994-10-05
EP0618403A3 EP0618403A3 (fr) 1995-03-08
EP0618403B1 EP0618403B1 (fr) 1997-11-19

Family

ID=4197310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810171A Expired - Lifetime EP0618403B1 (fr) 1993-03-23 1994-03-21 Récipient pour une chaudière à électrodes

Country Status (7)

Country Link
US (1) US5526461A (fr)
EP (1) EP0618403B1 (fr)
JP (1) JPH06300203A (fr)
CA (1) CA2119606A1 (fr)
CH (1) CH686976A5 (fr)
DE (1) DE59404595D1 (fr)
DK (1) DK0618403T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999050602A1 (fr) * 1998-03-31 1999-10-07 Ledoux Denis Michel Recyclage de cylindres d'humidification de l'air
CN111720809A (zh) * 2020-06-20 2020-09-29 烟台卓越新能源科技股份有限公司 一种电极式过热蒸汽锅炉

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10310249A1 (de) * 2003-03-08 2004-09-16 Samotec Automation + Trading Elektrohandels-Gmbh Flüssigkeitsverdampfungsverfahren
DE202009006788U1 (de) * 2009-04-30 2009-08-20 Alfred Kärcher Gmbh & Co. Kg Dampfreinigungsgerät
CA2894137C (fr) * 2012-12-05 2018-04-24 KIM, No Eul Chaudiere a electrodes comportant une unite d'electrodes
DE102017114404A1 (de) * 2017-06-28 2019-01-03 Die Erste ResoHeat GmbH Heizvorrichtung

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE395142C (de) * 1924-05-15 Siemens Elektrowaerme Ges M B Elektrisch beheizter Dampfkessel
DE306280C (fr) *
US1431580A (en) * 1922-10-10 Otto graetzer
DE331869C (de) * 1919-11-04 1921-01-15 Der Maschinenfabriken Escher A Mehrteilige Isoliervorrichtung fuer die Durchfuehrung einer elektrischen Leitung durch die Wandung eines mittels Elektroden elektrisch geheizten Dampfkessels
US1476080A (en) * 1922-01-03 1923-12-04 Frederick T Kaelin Electric-boiler construction
US1527762A (en) * 1923-04-07 1925-02-24 Gen Electric Electric steam boiler
US1950511A (en) * 1927-05-19 1934-03-13 Theobald H Noll Electrically operated steam generator for individual heating units
GB663286A (en) * 1949-02-19 1951-12-19 G W B Electric Furnaces Ltd Electrode boilers
US3426141A (en) * 1966-07-15 1969-02-04 Adolph D Storch Finger grip for a heating element of a vaporizer
FR2238295B1 (fr) * 1973-07-19 1978-02-17 Nat Res Dev
FR2300292A1 (fr) * 1975-02-05 1976-09-03 Eaton Williams Raymond Chaudiere a electrodes
DE2732683A1 (de) * 1977-07-20 1979-02-01 Normbau Gmbh Elektrodendampferzeuger
US4243870A (en) * 1978-02-09 1981-01-06 Champion Spark Plug Company Vaporizer with electrode housing interlock
US4423310A (en) * 1981-04-06 1983-12-27 Wehr Corporation Electrical steam generator having adjustable electrodes for an air humidifier
CA1166296A (fr) * 1982-11-18 1984-04-24 Monique Howard-Leicester Ecran d'electrode pour humidificateur
GB2191567B (en) * 1986-06-09 1990-03-28 Gerry Andrew Macias Electric steam generator with ground voltage-null control electrode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999050602A1 (fr) * 1998-03-31 1999-10-07 Ledoux Denis Michel Recyclage de cylindres d'humidification de l'air
CN111720809A (zh) * 2020-06-20 2020-09-29 烟台卓越新能源科技股份有限公司 一种电极式过热蒸汽锅炉

Also Published As

Publication number Publication date
CA2119606A1 (fr) 1994-09-24
DK0618403T3 (da) 1997-12-22
EP0618403B1 (fr) 1997-11-19
US5526461A (en) 1996-06-11
DE59404595D1 (de) 1998-01-02
JPH06300203A (ja) 1994-10-28
EP0618403A3 (fr) 1995-03-08
CH686976A5 (de) 1996-08-15

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