EP2140199A1 - Générateur de vapeur, procédé de fonctionnement d'un générateur de vapeur et réservoir d'un générateur de vapeur - Google Patents
Générateur de vapeur, procédé de fonctionnement d'un générateur de vapeur et réservoir d'un générateur de vapeurInfo
- Publication number
- EP2140199A1 EP2140199A1 EP08736834A EP08736834A EP2140199A1 EP 2140199 A1 EP2140199 A1 EP 2140199A1 EP 08736834 A EP08736834 A EP 08736834A EP 08736834 A EP08736834 A EP 08736834A EP 2140199 A1 EP2140199 A1 EP 2140199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- liquid
- steam generator
- cast
- resistances
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 230000008016 vaporization Effects 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000012546 transfer Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000005266 casting Methods 0.000 description 11
- 239000004411 aluminium Substances 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 235000010210 aluminium Nutrition 0.000 description 9
- 238000009834 vaporization Methods 0.000 description 9
- 238000009835 boiling Methods 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- 229910052791 calcium Inorganic materials 0.000 description 7
- 239000011575 calcium Substances 0.000 description 7
- 238000013021 overheating Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005755 formation reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000002308 calcification Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/06—Artificial hot-air or cold-air baths; Steam or gas baths or douches, e.g. sauna or Finnish baths
- A61H33/063—Heaters specifically designed therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/06—Artificial hot-air or cold-air baths; Steam or gas baths or douches, e.g. sauna or Finnish baths
- A61H33/063—Heaters specifically designed therefor
- A61H33/065—Heaters specifically designed therefor with steam generators
-
- 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
- F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/005—Electrical circuits therefor
- A61H2033/0054—Electrical circuits therefor with liquid level detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/01—Constructive details
- A61H2201/0173—Means for preventing injuries
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/02—Characteristics of apparatus not provided for in the preceding codes heated or cooled
- A61H2201/0221—Mechanism for heating or cooling
- A61H2201/0228—Mechanism for heating or cooling heated by an electric resistance element
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/50—Control means thereof
- A61H2201/5007—Control means thereof computer controlled
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/50—Control means thereof
- A61H2201/5058—Sensors or detectors
- A61H2201/5082—Temperature sensors
Definitions
- the present invention relates to a steam generator, which includes a tank of cast metal, equipped with a cover, for the liquid to be vaporized, the cast part of which tank includes the bottom and at least part of the side walls, and on the bottom of which tank there are cast heating resistances for vaporizing the liquid.
- the invention relates to a method for operating a steam generator and a vessel of a steam generator .
- New liquid must be continuously fed to the generator to replace the liquid that has left as steam.
- One known method is to arrange elements, such as low-voltage rod electrodes, that measure that surface level in the tank. A change in the elec- trical conductivity of the rod indicates the surface level in the tank at the time. The rods too have a tendency to collect a calcium layer on their surface, which leads to uncertainty and disturbances in the measurement of the surface level.
- the overheating protection may be fitted directly to the resistances. A drop in the level of the liquid will result in the upper parts of the resistance being exposed, leading to their possible burning out.
- UK patent 642,858 discloses an electrically heated tank for heating and melting substances.
- a tank with a removable cover is not suitable for steam-generator use, because it does not have, for example, means for measuring the surface level reliably.
- the resistances fitted in connection with the tank and the manner of arranging them in the tank do not permit efficient heat transfer to the tank structures.
- a universal sensor element in which there is a through opening for leading liquid into the generator and two blind holes for a low-power heating resistance and a temperature sensor, is known from PCT application publication WO - 2005/024300 A2.
- the amount of liquid in the tank at any time can be measured by the sensor for the temperature of the element, which is heated using a low-power resistance in the body.
- the liquid being led into the tank is preheated using the resistance in the body.
- a steam generator in which measurement of the amount of liquid in the tank from the temperature of the tank is applied, is known from EP patent application publication 1 221 570 A2.
- a certain part of the tank is heated using a special resistance, which is essentially separate from the heating resistances evaporating the actual liquid.
- the steam generators according to the prior art become complex, because in them the temperature of the measurement point, from which the amount of liquid in the tank is measured, is acted on by a special resistance fitted for this purpose to the tank structures, which requires its own electrical input and control and thus forms a construction complicating the implementation of the steam generator.
- the present invention is intended to create an improved steam generator, a method for operating a steam generator, and further also a vessel for of a steam generator.
- the characteristic features of the steam generator according to the invention are stated in Claim 1 and those of the method in Claim 11.
- the characteristic features of the vessel of the steam generator are stated in Claim 17.
- the boiling created by the generator is in all ways gentle and silent, compared to devices according to the prior art.
- the silence of the generator is an important advantage in terms of its operator comfort.
- the resistances cast into the side walls of the tank can extend into the zone of variation of the liquid level.
- the surface level of the liquid can be, surprisingly, monitored by means of sensor means fitted outside the generator.
- the sensor means can be arranged to measure the amount of liquid in the tank from above the liquid surface.
- the means can be formed of temperature sensors.
- the temperature of the tank, from which the amount of liquid is measured is affected by the heating resistances integrated in the tank. This substantially simplifies the implementation of the generator and the control of its operation.
- the measurement of temperature for example for measuring the surface level, can take place at the locations in the tank corresponding to the heat-transfer structures.
- the generator and the surface-level measurement arranged in it are also more tolerant of calcification, which now cannot cause, for example, thermal transmission / surface-level measurement problems, as can happen in known generators.
- the tank can be essentially closed. This removes the need for various kinds of seals, for example, for the corresponding resistance and sensor feed-throughs . This brings, in turn, an obvious advantage in manufacturing technique.
- Figure 1 shows one example of the generator according to the invention, without the front wall, seen at an angle from in front,
- FIG 2 shows a front view of the generator according to Figure 1
- FIG. 3 shows the generator according to Figure 1, seen at angle from the rear
- Figure 4 shows a cross-sectional side view of the generator according to the invention
- Figure 5 shows a flow diagram of an example of the method according to the invention
- Figure 6 shows a cross-section of one example of the construction of a resistance cast into the generator
- Figure 7 shows an example of a generator, in which the cover is formed by a second vessel.
- FIGS 1 - 4 show one example of a generator 10 according to the invention and its tank 11, seen from different directions.
- the generator 10 is shown in the vertical position in which it is at the point of use.
- the steam generator 10 is intended mainly for the continuous creation of steam, for example, in steam saunas, steam rooms, and steam cabinets, being of a non-pressurized type, i.e. an ('open' ) type that operates mainly at normal pressure.
- the steam generator 10 includes a tank 11, which is at least partly of cast metal and has a cover 27, equipped with connections 19', 20', for example, for a liquid substance, and heating resistances 12.1, 12.2 fitted in the tank 11 for evaporating the liquid that is led in.
- the steam generator includes a tank 11, which is at least partly of cast metal and has a cover 27, equipped with connections 19', 20', for example, for a liquid substance, and heating resistances 12.1, 12.2 fitted in the tank 11 for evaporating the liquid that is led in.
- the steam generator 10 includes a tank 11, which is at least partly of cast metal and has a cover 27, equipped with connections 19', 20', for example, for a liquid substance, and heating resistances 12.1, 12.2 fitted in the tank 11 for evaporating the liquid that is led in.
- the steam generator includes a tank 11, which is at least partly of cast metal and has a cover 27, equipped with connections 19', 20', for example, for a liquid substance, and heating resistances 12.1, 12.2 fitted in the
- 10 10 includes sensor means 21 for measuring the amount of liquid that is in the tank 11 at any time, and an overheating protection sensor, which can be external and thus in contact, for example, with the aluminium vessel 26.
- an overheating protection sensor which can be external and thus in contact, for example, with the aluminium vessel 26.
- the tank 11 is formed, for example, of an aluminium diecast vessel component 26, which is open at one side. Other materials 0 too, such as various metal alloys, may be considered.
- the open side can be equipped with holes 16 and a flange 28, equipped with a sealing groove / (silicon) gasket 17, to which a cover 27 ( Figure 2) that tightly closes the vessel 26 and then forms the side wall of the tank 11, can be attached.
- the shape of the 5 cross-section of the tank 11 can narrow upwards and can have a slightly rounded construction. The narrowing is now achieved by a step, a v back part' 14.
- the height H of the tank 11 is greater than its width W. The ratio of these dimensions is effective in terms of both steam generation and also the arrangement of 0 the heating resistances 12.1, 12.2.
- the lower spaces can also be referred to as a boiling / vaporization chamber 11' and takes up most of the internal space of the tank 11.
- the height of the chamber 11 ' corresponds to most of the height of the 5 entire generator 10.
- the upper space which has a narrower cross-section than the lower vaporization cham- ber 11', can be referred to as a vaporization chamber or a steam separator 11*.
- the vaporization chamber 11 * also acts as an effective droplet eliminator.
- connections 19', 20' shown by way of example in Figure 1 can be, for example, in the cover 27 in such a way that they are in the area of the vapour chamber 11 ' .
- the connections can include at least one inlet connection 20' and at least one outlet connection 19 '.
- a pipe connected to the water mains network, by means of which water / other possible agents for vaporization is/are led to the generator 10, is attached to the inlet connection 20'.
- scent-producing substances are scent-producing substances.
- a steam pipe 19 (with an internal diameter of 20 mm, for exam- pie) is connected to the outlet connection 19'.
- the steam pipe 19 is in the upper part of the tank 11. The opposite end of it can be attached to the steam connection of the steam room, to which it is intended to lead the steam.
- the generator 10 can thus be installed outside the room where the steam is used, or even inside the room where the steam is used.
- the heating resistances 12.1, 12.2 of the generator 10 are surprisingly, for example, entirely cast into the tank 11.
- the tank resistances 12.1, 12.2 can be integrated in a diecast aluminium tank 11, for example, in its outermost side walls 23.1, 23.2 of cast metal that define the tank chamber 11' and additionally in the cast-metal bottom 24 of the tank 11.
- the generator 10 is then examined in its operating position.
- the heating resistances 12.1 integrated by casting in the protrusions 15.1, 15.2 in the casting of the opposite side walls 23.1, 23.2 extend at least partly into the area A of variation of the liquid surface P 1 , P 2 .
- the variation of the liquid surface level changes in such a way that it drops through the evaporation of the liquid performed by the heating resistances 12.1, 12.2 and rises through the addition of liquid to the tank 11.
- another way to arrange the resistances can be to arrange ribbed-plate shapes, into which a resistance can be cast (not shown), oriented facing into the tank 11, for example, inside the tank 11.
- aluminium is one example of a suitable material, which offers good thermal conductivity and thus also efficient heat transfer from the resistances 12.1, 12.2 cast into the base structures of the tank 11 (into the vessel component 26) to the liquid being vaporized.
- the surface thermal output of the resistances of the generator 10 (for example, about 10 W/cm 2 ) is considerable compared to that of a traditional sauna stove (for example, about 3,2 W/cm 2 ).
- a traditional sauna stove for example, about 3,2 W/cm 2 .
- each resistance 12.1, 12.2 can form in the tank 11 its own totality that winds (zig-zags) back and forwards like a comb, in which there is one resistance for each wall 23.1, 23.2, 24. It should be noted that in the embodiment shown in the figures there are visible resistances 12.1 and 12.2.
- the wall 23.1 is also equipped with its own resistance, which does not appear in Figures 1 - 4 due to the manner in which they are shown.
- the resistances 12.1, 12.2 can also be connected in series.
- the dimensioning of the resistances 12.1, 12.2 can be selected appropriately, for example, according to the capacity of the tank 11. It is possible to use resistances of differing sizes.
- the ends of the resistances 12.1, 12.2 protrude from the rear part of the cast tank 11, in which there is the necessary equipment 18 for electrical connections.
- the spiral resistance wire 29 can start only from inside the casting 11, for example, at a distance of 5 - 10 mm from the outer surface of the casting 11, from which the ends of the resistances 12.1, 12.2 protrude from the casting 11.
- the control electronics of the resistances 12.1, 12.2 can be, as such, known (not shown).
- the sensor means 21 can be fitted to the outer surface 14 of the tank 11, for example, at a location corresponding to the heat-transfer structure 13, thus being in the area of influence of the structure 13.
- the heat-transfer structure is formed of a ribbed construction 13 (in this case, seven ribs at a distance to each other) , which are also a permanent formation in the cast piece, in other words part of the casting.
- the row of ribs 13 is in the back formation 14 of the tank 11.
- the ribs 13 can be in the upper part 11' of the evaporation chamber II 1 the tank 11, above the resistances 12.1, 12.2.
- the sensor means 21 are used to measure the amount of liquid in the tank 11 at any time, surprisingly from the temperature of the tank 11, particularly of its cast piece (vessel) 26, which the heating resistances 12.1, 12.2 mainly affect.
- the sensor means 21 are arranged to measure the amount of liquid in the tank 11, surprisingly from above the liquid level P 1 , P 2 (Fig- ure 2) in the tank 11. Because the resistances 12.1 cast into the side walls, 23.1, 23.2 extend into the area A of variation of the liquid surface P 1 , P 2 , the part of the heating resistances 12.1 in the side walls 23.1, 23.2, by means of which the liquid in the tank 11 is heated, above the falling / fallen liquid surface then heat the tank structure 11 considerably because it then extends to the dry inner surface-area of the tank 11. The increase in the temperature of the tank 11 that this causes is used to indicate the surface level of the liquid, which can be detected using a sensor 21 above the liquid surface P 1 , P 2 .
- the sensor means 21 can be formed, for example, of one or more temperature sensors 21, which are connected to a measurement/control circuit 23. Their location is shown schematically in Figure 3. Now the sensors 21 in their entirety and, in addition the resistances 12.1 of the side walls 23.1, 23.2, or the formations 15.1, 15.3 arranged for them in the casting 11, are at least partly above the dropped water surface, in the area of the back part 14 of the tank. Also surprising in this case is the fact that the liquid surface level of the tank 11, i.e. the amount of liquid, can be measured from outside the tank 11, without contact relative to the liquid in the tank 11. The advantage of using external sensors 21 is that they do not deteriorate over time, as will happen due to the calcification of sensors inside the tank 11 in direct contact with the liquid.
- piping 20, more generally a liquid distribution element is connected inside the tank 11 to the inlet connection 20'.
- piping 20' it is possible to guide / direct the liquid flow led inside the tank 11 directly to the back part 14 and even more particularly to its heat-transfer structure 13.
- the cold water flow brought to the tank 11 through the inlet connection 20' immediately cools the back part 14 of the tank and the row of ribs 13.
- the possibly cool water will also preheat when it strikes the hot row of ribs 13.
- the effect of water introduced to the tank 11 on the boiling level is more controlled.
- the piping 20 can, according to one embodiment, be formed of a branched arrangement, so that the liquid can be sprayed more broadly onto the rib structure 13 than when only a single outlet is used. Thus the row of ribs 13 cools more evenly and rapidly over the entire area of the tank rear 14.
- a separation element 25 ( Figures 2 and 4) can also be arranged between the heat-transfer structure 13 and the tank component 11 ' equipped with the resistance means 12.1, 12.2. It can be formed, for example, of a planar piece, a separator plate.
- One task of the shield 25 is to eliminate the possible shock effect on the generator 10 of the liquid led into it from the connection 20' , and particularly on the boiling liquid associated with the resistances 12.1, 12.2 in its lower part 11'.
- Another task of the shield 25 is to isolate the boiling and bubbling liquid in the vaporization chamber 11' equipped with the resistances 12.1, 12.2 from splashing onto the row of ribs 13 , which might otherwise interfere with the surface-level measurement performed from the temperature of the tank 11.
- the separator plate 25 can be mainly in the area of the ribs 13, in which case it will not extend horizontally as far as the cover component 27 or to the rear wall of the tank 11 opposite to the cover component 27. In other words, despite the separator plate 25, the liquid can reach the vaporization chamber 11' and the generated steam can correspondingly reach the upper vaporization chamber 11* and then the steam connection 19 ' , through which it exits the generator 10.
- the resistances 12.1, 12.2 cast into the tank 11 can be, for example, as such, known industrial tube resistances integrated in the casting.
- One example of the cross-sectional diameter of such industrial Standard resistances can be 3 - 15 mm, such as 5 - 10 mm, for example 6 mm, 8 mm, or 8,5 mm.
- the material thickness of the comb-like cast formation 15.1 - 15.3, inside which the resistances 12.1, 12.2 are according to one embodi- ment, can be for example 7 - 20 mm ( a 2 - 6-mm cast layer between the resistance 12.1, 12.2 and the internal spaces of the tank 11) .
- Figure 6 shows a cross-section of one example of the construc- tion of a resistance 12.1, 12.2.
- the construction of the resistance 12.1, 12.2 can be, for example, such that a spiral resistance wire 29, for example, is inside a resistance tube 30 or similar outer jacket.
- the wire 29 is surrounded by a filler agent 31 in a solid form acting as an insulator.
- the filler 31 can be, for example, magnesium oxide powder.
- the powder 31 is a poor thermal conductor, but nevertheless better than only air, for example.
- One industrial way to manufacture such resistances 12.1, 12.2 is to fill a tube 30 of a diameter of, for example, 10 mm, with a resistance wire 29 and magnesium oxide 31. After filling, the tube 30 is plugged at both ends and is vibrated to compact the oxide powder 31 around the spiral wire 29. After vibration, the tube 30 can be milled to a diameter of 8,5 mm, for example.
- Other industrial methods of implementing resistances, which are not intended to be changed afterwards, or even to be partly removed from the casting 11, will also be obvious to one skilled in the art.
- the same sensor totality that is used to measure the temperature of the tank 11, which indicates the surface level of the water, can act as an overheating sensor.
- the overheating sensor can also be a dedicated sensor, which is nevertheless in contact with, for example, the alu- minium jacket 26 of the tank 11. It should be understood that the figures show neither a possible protective jacket of the generator 10 nor other accessories that may belong to it (for example, an emptying pump, etc.) .
- Figure 5 shows a flow chart of one rough example of an applica- tion of the sub-stages of the method according to the invention for operating a steam generator 10.
- the generator In stage 500, the generator
- Stage 500 can include startup operations that are, as such known, for example prefilling the tank 11 with a safe amount of water according to a setting, if the tank has been emptied after its previous use.
- liquid is vaporized using resistance means 12.1, 12.2 cast into the tank 11, which is at least partly of cast metal, and is led to the point of use of the steam, for exam- pie, a sauna, room, cabinet, or corresponding leisure room.
- the liquid is vaporized by resistances 12.1, 12.2, at least part of which extend into the area A of variation of the liquid surface P 1 , P 2 .
- These heating resistances 12.1 extending into the area A are in the side walls 23.1, 23.2 of the tank 11.
- a criterion value on the basis of which the power supply to the resistances is regulated, is set for the heating.
- the temperature of the steam room is compared to the criterion value and on its basis the resistances 12.1, 12.2 of the generator 10 are controlled.
- stage 502 the amount of liquid in the tank 11, i.e. the surface level at any time is measured from the temperature T of the tank 11, which is affected mainly by the heating resistances 12.1, 12.2 evaporating the liquid.
- the measurement is performed using a sensor 21 surprisingly above the liquid surface P 1 , P 2 in the tank 11.
- a check is made as to whether the temperature T of the tank 11 exceeds the criterion value T n ⁇ x set for it. Exceeding the value indicates a drop in the water surface to below the minimum surface P 2 set for it ( Figure 2) .
- stage 504 a set additional amount of water is poured into the tank 11, when the surface level of the water will rise to the level P 1 ( Figure 2) .
- adding liquid to the tank 11 is started when a criterion according to a setting is met, with reference to the temperature of the tank 11.
- the temperature of the tank 11 drops slightly, but then starts once again to rise rapidly when the resistances 12.1, 12.2 perform the controlled heating of the added water.
- the generator 10 according to the invention is characterized by a rapid periodicity. This ensures that the generator 10 does not cool excessively and also that its operation is silent.
- the liquid led into the tank 11 can, for its part, be used to cool the tank structures 13, 14. More particularly, it is possible to cool, for example, the structures through which the amount of liquid in the tank 11 is measured, for example, the ribbing 13 and/or the rear area 14 of the tank 11, which ribbing 13 is arranged on the inside of the tank 11.
- the amount of water to be fed can, on the other hand, also be controlled on the basis of the cooling of the row ribs 13, if this is possible.
- the heating process 501 continues as its own loop and the determining of the sur- face level 502 - 504 as its own loop.
- the cover that tightly closes the side wall of the tank 11 can be formed, instead of a flat plate, also of a second tank 11.2.
- the tanks 11, 11.2 will be against each other on their open sides.
- the connection 19 can be used to lead the steam out and the connection 19 ' surprisingly to lead the liquid in.
- the liquid capacity of the generator can be easily doubled and, for instance, a 9 kW generator can be easily obtained.
- other ways of increasing the output of the generator 10 are also possible (increasing the number / size of the resistances) .
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Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI2007050204 | 2007-04-19 | ||
PCT/FI2008/050185 WO2008129119A1 (fr) | 2007-04-19 | 2008-04-14 | Générateur de vapeur, procédé de fonctionnement d'un générateur de vapeur et réservoir d'un générateur de vapeur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2140199A1 true EP2140199A1 (fr) | 2010-01-06 |
EP2140199A4 EP2140199A4 (fr) | 2013-08-14 |
Family
ID=39875132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08736834.6A Withdrawn EP2140199A4 (fr) | 2007-04-19 | 2008-04-14 | Générateur de vapeur, procédé de fonctionnement d'un générateur de vapeur et réservoir d'un générateur de vapeur |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2140199A4 (fr) |
WO (1) | WO2008129119A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6205580B2 (ja) * | 2013-09-18 | 2017-10-04 | パナソニックIpマネジメント株式会社 | 液体微細化装置とそれを用いたサウナ装置 |
US11071688B2 (en) | 2019-05-22 | 2021-07-27 | Kohler Co. | Steam system and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0238955A2 (fr) * | 1986-03-26 | 1987-09-30 | E.G.O. Elektro-Geräte Blanc u. Fischer | Dispositif de chauffage de fluides |
EP0193863B1 (fr) * | 1985-03-08 | 1990-11-07 | E.G.O. Italiana S.p.A. | Générateur de vapeur, en particulier pour appareils de cuisson |
DE4443798C1 (de) * | 1994-12-08 | 1996-03-21 | Kaercher Gmbh & Co Alfred | Dampfreinigungsgerät |
US6243535B1 (en) * | 1997-02-14 | 2001-06-05 | Ecovap S.A. | Steam generator |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB642858A (en) | 1948-07-29 | 1950-09-13 | Gillott Electro Steam Cookers | Improvements in or relating to electrically heated tanks for heating and melting substances |
DE19606346C2 (de) | 1996-02-21 | 1998-07-16 | Sevri Sauna Fritz Seebauer | Verdampfersystem für Sauna-Anlagen |
CA2362092A1 (fr) * | 2000-11-16 | 2002-05-16 | Sunbeam Products, Inc. | Vaporiseur pour vetements |
EP1221570A3 (fr) | 2000-12-15 | 2003-02-05 | Pierantonio Milanese | Générateur de vapeur avec système automatique de chargement d'eau |
GB2384293B (en) | 2002-01-19 | 2005-08-24 | Thornhill Brian Ltd | A steam generator |
ITMI20031729A1 (it) | 2003-09-10 | 2005-03-11 | Ilaria Senno | Dispositivo universale di rilevamento del livello in caldaie a vapore. |
FI117665B (fi) * | 2005-08-10 | 2007-01-15 | F E M Ltd | Höyrynkehitin |
-
2008
- 2008-04-14 WO PCT/FI2008/050185 patent/WO2008129119A1/fr active Application Filing
- 2008-04-14 EP EP08736834.6A patent/EP2140199A4/fr not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0193863B1 (fr) * | 1985-03-08 | 1990-11-07 | E.G.O. Italiana S.p.A. | Générateur de vapeur, en particulier pour appareils de cuisson |
EP0238955A2 (fr) * | 1986-03-26 | 1987-09-30 | E.G.O. Elektro-Geräte Blanc u. Fischer | Dispositif de chauffage de fluides |
DE4443798C1 (de) * | 1994-12-08 | 1996-03-21 | Kaercher Gmbh & Co Alfred | Dampfreinigungsgerät |
US6243535B1 (en) * | 1997-02-14 | 2001-06-05 | Ecovap S.A. | Steam generator |
Non-Patent Citations (1)
Title |
---|
See also references of WO2008129119A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008129119A9 (fr) | 2008-12-18 |
WO2008129119A1 (fr) | 2008-10-30 |
EP2140199A4 (fr) | 2013-08-14 |
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