EP3440410A1 - Boiler - Google Patents
BoilerInfo
- Publication number
- EP3440410A1 EP3440410A1 EP17716511.5A EP17716511A EP3440410A1 EP 3440410 A1 EP3440410 A1 EP 3440410A1 EP 17716511 A EP17716511 A EP 17716511A EP 3440410 A1 EP3440410 A1 EP 3440410A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boiler
- container
- auxiliary coating
- correspondence
- μηι
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 19
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000007649 pad printing Methods 0.000 claims description 4
- 238000010422 painting Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000005755 formation reaction Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 4
- 230000000181 anti-adherent effect Effects 0.000 description 3
- 238000010411 cooking Methods 0.000 description 3
- 239000008236 heating water Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000010409 ironing Methods 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003911 antiadherent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F75/00—Hand irons
- D06F75/08—Hand irons internally heated by electricity
- D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
- D06F75/12—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source
-
- 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
- F24H9/40—Arrangements for preventing corrosion
- F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
Definitions
- the present invention concerns a boiler to generate steam and/or to heat water, usable in domestic appliances and professional machines such as, for example, ironing or cleaning apparatuses, coffee machines, steamers for cooking food, steam ovens and suchlike.
- Boilers used to selectively generate steam and/or to heat water in domestic appliances and professional machines normally comprise a metal container, hermetically closed, provided with at least an entrance aperture for the water and, possibly, an exit aperture for the steam.
- Some types of boiler can also comprise a discharge aperture to empty the water from the container, in order to clean or inspect it.
- a heating element is normally associated with the metal container, generally an electric resistance or plate, selectively activated to generate the desired quantity of steam and/or to take the water to the desired temperature.
- Boilers normally comprise one or more detection devices to detect the temperature and/or pressure inside the metal container, so as to monitor them and prevent them from exceeding determinate threshold values which can damage the metal container and the boiler itself.
- limescale are generated inside the metal container, consisting of calcium carbonate and/or other minerals such as magnesium, potassium and silicon, normally dissolved in the water.
- limescale can cause a problem that, since the devices to detect the temperature and/or pressure are generally installed outside the metal container, the detection can be influenced by the presence of limescale deposited on a portion of the internal surface opposite the external portion where they are positioned.
- the minerals that the incrustations of limescale consist of are heat insulating, and therefore they can delay or distort the detection of the temperature and/or pressure inside the metal container.
- Document WO 01/94861 describes a water heating container inside which a tubular heating element with an elongated shape is disposed.
- the container provides an aperture to feed the water and an aperture through which the heated water comes out.
- the feed aperture is directly connected to the tubular heating element through which the water passes and is heated.
- the heating element consists of a pipe on which the electric heating resistances are printed. With the same technology, temperature detection sensors can be printed on the wall of the pipe.
- the tubular heating element also has a layer of internal coating material which coats it completely, for example polypropylene, which inhibits the deposit of limescale.
- Document EP 2.886.024 describes a detection devices for an oven.
- the detection device is installed partly inside a cooking chamber.
- One purpose of the present invention is to supply a boiler to generate steam and/or to heat water that allows to monitor constantly and effectively over time the temperature and/or pressure inside the metal container.
- Another purpose is to supply a boiler to generate steam and/or to heat water that allows to make a detection of the temperature inside the metal container that is not influenced by the possible formation of incrustations of limescale inside the metal container itself.
- Another purpose is to supply a boiler to generate steam and/or to heat water that is simple and economical but at the same time is reliable and long-lasting.
- Another purpose is to perfect a method for producing a boiler to generate steam and/or to heat water that is simple, economical and makes the boiler reliable and long-lasting.
- the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
- a boiler to generate steam and/or heating water comprises a container, defining a compartment for containing the water, provided with at least a feed aperture to introduce the water inside it.
- the boiler also comprises a heating element associated with the container, outside and/or inside the containing compartment, and at least a device to detect the physical quantities, such as temperature and/or pressure, inside the container, positioned on an external surface of the container.
- a heating element associated with the container, outside and/or inside the containing compartment, and at least a device to detect the physical quantities, such as temperature and/or pressure, inside the container, positioned on an external surface of the container.
- the at least one detection device can be installed on a lateral external surface of the container, and/or on a bottom external surface of the container, in correspondence with at least one detection zone.
- detection zone we mean a zone inside the container where a physical quantity can be measured to monitor the temperature and/or pressure inside the container, to verify that they remain inside a predetermined range and/or to control the values of the steam exiting, to avoid exceeding safety values and to prevent damage to the boiler.
- the container is provided, on an internal surface thereof, with at least an auxiliary coating, applied only in correspondence with the at least one detection zone in correspondence with which, on the external side, the at least one detection device is positioned.
- the auxiliary coating is made of a material suitable to inhibit the formation of limescale on the portion of internal wall of the container where it is applied.
- auxiliary coating we mean a coating that can be applied directly on the internal surface of the metal container, or above possible other coatings generally used to refine and complete a metal container.
- the function of the auxiliary coating is to prevent, or at least reduce, the formation of incrustations of limescale in the zones affected by the control carried out by the detection device.
- the detection device not being influenced, or being less influenced, by the deposits of limescale, can detect effectively, also over time, the physical quantities inside the boiler, thus limiting the risk of malfunctions and/or breakdowns.
- the auxiliary coating is made of a material with anti-adherent properties, suitable to prevent, or at least limit, the formation and deposit of limescale upon it.
- the auxiliary coating is made of a material with low porosity and good chemical stability, which make it difficult for the limescale or other chemical substances to attack.
- the auxiliary coating is made by painting or pad printing a material with a ceramic base, or other suitable material.
- the auxiliary coating is made of a material with a sol-gel base.
- the auxiliary coating is made of polytetrafluoroethylene (PTFE).
- the auxiliary coating can comprise one or more layers of material.
- the detection device can comprise one or more NTC (Negative Temperature Coefficient) thermistors, and/or PTC (Positive Temperature Coefficient) thermistors, installed on the lateral external surface, to detect the temperature of the water or steam inside the container.
- NTC Negative Temperature Coefficient
- PTC Platinum Temperature Coefficient
- the detection device can comprise one or more heat sensors positioned on the bottom external surface, in correspondence with determinate areas of the heating element, to monitor the functioning of the latter.
- an auxiliary coating can be provided in correspondence with each of the heat detection devices and the heat sensors.
- the present invention also concerns a method to make a boiler to generate steam.
- - fig. 1 is a perspective view of a boiler to generate steam and/or to heat water according to embodiments described here;
- - fig. 2 is a partly sectioned perspective view of the boiler in fig. 1 at a different angle;
- - fig. 3 is a section view along plane ⁇ of the boiler in fig. 1.
- Embodiments described here with reference to figs. 1-3 concern a boiler 10 to generate steam and/or to heat water, usable in electric appliances and professional machines such as, for example, apparatuses for ironing or cleaning, coffee machines, steamers for cooking food, steam ovens and suchlike.
- the boiler 10 comprises a metal container 12 defining a compartment able to contain the water to be transformed into steam, hermetically closed and provided with a feed aperture 14 to introduce the water inside.
- the container 12 comprises a first shell 12a and a second shell 12b, coupled and hermetically sealed with each other along the respective peripheral edges, so as to resist the pressure generated inside the container 12.
- the first shell 12a is a lower shell, while the second shell 12b is an upper shell.
- the container 12 can also be provided with an exit aperture for the steam, connected to devices to emit and regulate the steam 16.
- the container 12 can also be provided with a discharge aperture 28 to empty the container 12 and/or to remove possible limescale.
- the boiler 10 comprises a heating element 18 associated with the container 12 and configured to heat the water inside the latter.
- the heating element 18 can be an electric resistance or an electric plate, positioned in contact with the external bottom of the container 12.
- a heating element 18 can be provided, as an alternative or in addition, located at least partially inside the container 12, in direct contact with the water to be heated.
- the boiler 10 also comprises one or more detection devices 20 configured to detect the temperature and/or pressure inside the container 12 and disposed on an external surface 24 of the container 12, positioned in correspondence with determinate detection zones 22.
- the detection devices 20 are preferably disposed on an external surface 24 of the lower shell 12a.
- the detection devices 20 can comprise heat detection devices such as NTC (Negative Temperature Coefficient) thermistors, or PTC (Positive Temperature Coefficient) thermistors, and/or heat sensors of other types.
- NTC Negative Temperature Coefficient
- PTC Platinum Temperature Coefficient
- the detection devices 20 can be positioned on a lateral external surface 24a of the container 12, to detect the temperature inside the container 12, and/or on a bottom external surface 24b of the container 12 in correspondence with determinate areas of the heating element 18, to detect the temperature of the latter.
- the container 12 is provided, on an internal surface 26, with an auxiliary coating 30, applied only in correspondence with the detection zones 22 on which the detection devices 20 are disposed.
- the limescale can deposit on the remaining part of the internal surface 26.
- the auxiliary coating 30 can be applied on an area correlated to the sizes of the one or more detection devices 20 and/or to the area needed by the detection devices 20 to detect the temperature.
- the area where the auxiliary coating 30 is applied can have a much smaller extension than the lateral internal surface 26a and/or the bottom internal surface 26b, for example it can be less than 10% of the extension of each of these.
- the auxiliary coating 30 can be applied on a lateral internal surface 26a, and/or on a bottom internal surface 26b of the container 12, in correspondence with the respective detection zones 22 on which the detection devices 20 are installed.
- the lateral internal surface 26a and/or bottom internal surface 26b are those most affected by incrustations of limescale.
- the auxiliary coating 30 can be made of anti- adherent material.
- the auxiliary coating 30 is made of a material with low porosity and good chemical stability, which make it difficult for the limescale or other chemical substances to attack.
- the auxiliary coating 30 is made by painting or pad printing.
- the auxiliary coating 30 is made by applying one or more layers of material.
- the auxiliary coating 30 is made of a ceramic based material, or other similar suitable material.
- the auxiliary coating 30 is made by painting or pad printing with a sol-gel based material, or is made using the sol-gel process.
- the auxiliary coating 30 is made of polytetrafluoroethylene (PTFE), which can resist high temperatures and has optimum anti-adherent properties.
- PTFE polytetrafluoroethylene
- the auxiliary coating 30 is very thin, so that it does not create any insulating effect and/or retardant effect in detecting the temperature by the detection devices 20, thus guaranteeing a reliable detection of the temperature.
- the auxiliary coating 30 has a thickness comprised between about 1 ⁇ and about 100 ⁇ .
- the auxiliary coating 30 has a thickness comprised between about 20 ⁇ and about 90 ⁇ .
- the auxiliary coating 30 has a thickness comprised between about 20 ⁇ and about 50 ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Textile Engineering (AREA)
- Cookers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUA2016A002359A ITUA20162359A1 (en) | 2016-04-06 | 2016-04-06 | BOILER |
PCT/EP2017/058232 WO2017174712A1 (en) | 2016-04-06 | 2017-04-06 | Boiler |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3440410A1 true EP3440410A1 (en) | 2019-02-13 |
EP3440410B1 EP3440410B1 (en) | 2020-08-26 |
Family
ID=56297036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17716511.5A Active EP3440410B1 (en) | 2016-04-06 | 2017-04-06 | Boiler |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3440410B1 (en) |
CN (1) | CN109312931B (en) |
ES (1) | ES2828056T3 (en) |
IT (1) | ITUA20162359A1 (en) |
WO (1) | WO2017174712A1 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001317817A (en) * | 2000-05-08 | 2001-11-16 | Toto Ltd | Hot water heater |
IT1315636B1 (en) * | 2000-06-08 | 2003-03-14 | Thermowatt Spa | ELECTRIC TUBULAR HEATING ELEMENT IN PARTICULAR FOR DOMESTIC WATER HEATERS AND FOR HOUSEHOLD APPLIANCES IN GENERAL. |
CN1125289C (en) * | 2000-07-24 | 2003-10-22 | 沈阳世纪节能有限公司 | Intelligent, full automatic, all in one, heat supply electric boilet system |
JP2004190924A (en) * | 2002-12-10 | 2004-07-08 | Matsushita Electric Ind Co Ltd | Water heater |
DE102004060382A1 (en) * | 2004-12-15 | 2006-06-29 | Bleckmann Gmbh & Co. Kg | Thick-film heating pipe |
ES2278539B1 (en) * | 2006-01-31 | 2008-07-16 | Celaya, Emparanza Y Galdos, Internacional, S.A. | SOLE OF IRON AND IRON THAT CONTAINS IT. |
ITMI20120298U1 (en) * | 2012-08-06 | 2014-02-07 | De Longhi Appliances Srl | BOILER FOR AUTOMATIC COFFEE MACHINE |
EP2886024B1 (en) * | 2013-12-18 | 2019-02-20 | ELECTROLUX PROFESSIONAL S.p.A. | Improved detection assembly for electric appliances |
CN104110854A (en) * | 2014-04-28 | 2014-10-22 | 芜湖美的厨卫电器制造有限公司 | Water heater liner and production method thereof |
CN103994570B (en) * | 2014-05-29 | 2019-08-27 | 东辉休闲运动用品(上海)有限公司 | A kind of Multi-layer warming unit ptc heater |
CN107062596A (en) * | 2017-06-06 | 2017-08-18 | 河北巨川节能科技有限公司 | The turbulent condensing boiler of the corrosion resistant low nitrogen of Heat Room |
-
2016
- 2016-04-06 IT ITUA2016A002359A patent/ITUA20162359A1/en unknown
-
2017
- 2017-04-06 WO PCT/EP2017/058232 patent/WO2017174712A1/en active Application Filing
- 2017-04-06 ES ES17716511T patent/ES2828056T3/en active Active
- 2017-04-06 CN CN201780035051.XA patent/CN109312931B/en active Active
- 2017-04-06 EP EP17716511.5A patent/EP3440410B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
ES2828056T3 (en) | 2021-05-25 |
CN109312931B (en) | 2021-06-15 |
EP3440410B1 (en) | 2020-08-26 |
CN109312931A (en) | 2019-02-05 |
ITUA20162359A1 (en) | 2017-10-06 |
WO2017174712A1 (en) | 2017-10-12 |
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