EP2997306A1 - Steam generator - Google Patents
Steam generatorInfo
- Publication number
- EP2997306A1 EP2997306A1 EP13722455.6A EP13722455A EP2997306A1 EP 2997306 A1 EP2997306 A1 EP 2997306A1 EP 13722455 A EP13722455 A EP 13722455A EP 2997306 A1 EP2997306 A1 EP 2997306A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bottom wall
- steam generator
- fresh water
- generator according
- 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.)
- Withdrawn
Links
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
- F22B1/285—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs the water being fed by a pump to the reservoirs
Definitions
- the invention relates to a steam generator for a steam cleaner or for a steam iron, with a boiler surrounding a steam generating space and a heated bottom wall having an upper bottom wall portion and a lower bottom wall portion, which are arranged relative to the vertical at different heights, to be evaporated fresh water via at least one water inlet opening of the boiler to the upper bottom wall portion can be supplied and a bottom wall temperature can be detected by means of a temperature sensing element.
- Steam generators for steam cleaning equipment usually have a boiler in which a defined amount of water stored and heated after commissioning of the device to a predetermined temperature or a given, prevailing in the boiler steam pressure. Depending on the amount of water that is in the boiler, and depending on the available heating power such devices require a certain heat-up time, which may be five minutes, for example. Only after the heating time has elapsed, the steam cleaning device is ready for operation. When using the steam generator in a steam cleaning device, steam can only be directed to a surface to be cleaned after the end of the heating time. Alternatively, steam can be supplied to a steam iron at the end of the heating time.
- a steam generator in which the boiler has an obliquely oriented to the vertical bottom wall, on the underside of a hot plate is attached and a temperature sensing member in the form of a thermostat switch.
- Fresh water is supplied to the boiler via a water inlet opening, the fresh water from the water inlet opening of the boiler striking an upper bottom wall section, on the underside of which the temperature sensing element is arranged and from which the fresh water flows to a lower bottom wall section.
- On the way from the upper bottom wall portion to the lower bottom wall portion evaporates a part of the supplied fresh water and the remaining water collects in the lower bottom wall portion.
- the temperature of the upper bottom wall portion is detected by the temperature detecting member.
- Object of the present invention is to develop a steam generator of the type mentioned in such a way that the deliverable per unit time steam discharge amount has at least a lower dependence on the inclination of the steam generator.
- the upper bottom wall portion has a fresh water supply area and a temperature detection range, wherein the fresh water supply area fresh water via the at least one water inlet opening can be fed and the temperature of the temperature detection range is detected, the fresh water supply range from the temperature detection range by means of a separator is disconnected.
- the steam generator according to the invention has in its upper bottom wall portion a fresh water supply region and a temperature detection region, which are arranged at a distance from each other and separated from each other by means of a separator.
- Fresh water can be supplied to the fresh water supply area via the at least one water inlet opening.
- the fresh water can at least partially evaporate directly in the fresh water supply area.
- the remaining part of the fresh water can flow from the fresh water supply area in the lower bottom wall section and there further heated and evaporated.
- preheated fresh water passes. This avoids larger pressure fluctuations. Fresh water that is not preheated can not conveniently reach the lower bottom wall section.
- the temperature of the bottom wall is detected in a temperature detection range that is spaced from the fresh water supply region and separated from the fresh water supply region by a separator.
- the separator ensures that even when an inclination of the steam generator supplied fresh water does not reach the Frischsererzuschreib Scheme directly into the temperature detection range and thereby affect the measurement of the temperature of the bottom wall, but also flows at an inclination of the steam generator, the fresh water from the fresh water area to the temperature detection range around in the lower bottom wall section.
- the temperature detected in the temperature detection range is therefore practically independent of the flow path of the fresh water within the boiler.
- the distance between the fresh water area and the temperature sensing area and the separator ensure that the temperature sensing area can not be dripped or doused directly from the boiler supplied fresh water. Even with an inclination of the steam generator relative to the vertical, the fresh water supplied to the boiler can not reach the temperature detection range directly and influence its temperature.
- the temperature of the bottom wall in the temperature sensing area depends primarily on the total amount of fresh water in the boiler, but it is not significantly dependent on the inclination of the steam generator. If the total amount of water in the boiler reaches a predetermined maximum level, this results in a relatively low temperature of the bottom wall in the temperature detection area, and when a lower limit temperature is reached, the supply of fresh water is stopped by means of the temperature sensing element.
- the amount of water in the boiler then evaporates gradually and the temperature of the bottom wall in the temperature detection range increases. If an upper limit temperature is reached, the temperature detection member outputs a corresponding control signal, under the effect of which fresh water can be supplied to the boiler by means of a pump again.
- the vapor pressure within the boiler and thus the deliverable per unit time amount of steam are largely independent of the inclination of the steam generator to the vertical in the steam generator according to the invention.
- the bottom wall is aligned in the normal position of use of the steam generator obliquely to the horizontal.
- the inclination of the bottom wall to the horizontal is favorably 20 ° to 40 °, in particular about 30 °.
- the separating device has a lower partition projecting from the bottom wall and projecting into the steam generating space. has.
- the partition wall can ensure in a structurally simple manner that fresh water, which passes from the at least one water inlet opening to the fresh water supply region of the bottom wall, can not flow directly into the temperature detection area.
- the lower partition wall advantageously surrounds the temperature detection area in the circumferential direction at least partially.
- Such a design ensures a structurally simple way that fresh water that flows from the fresh water area to the lower bottom wall section, can not easily get into the temperature detection area.
- the lower partition wall is designed arcuate.
- the lower partition wall is designed horseshoe-shaped.
- the lower partition to a first end and a second end, which release between the lower bottom wall portion facing wall opening and which are preferably integrally connected to each other via a C- or U-shaped connecting portion.
- the lower dividing wall may surround the temperature detection area in the circumferential direction over an angular range of at least 180 °, preferably approximately 270 °. Fresh water can flow from the fresh water supply area along the lower partition wall into the lower bottom wall section without being able to get into the temperature detection area surrounded by the lower partition wall.
- the separating device has an upper, projecting from a ceiling wall of the boiler, projecting into the steam generating space partition.
- the upper partition wall can prevent fresh water dripping from the at least one water inlet opening. This can get into the temperature detection range at an inclination of the steam generator.
- the upper partition may extend to the bottom wall of the boiler.
- the upper dividing wall extends in the vertical direction at least in a section up to the lower dividing wall.
- the boiler of the steam generator according to the invention on an upper partition and a lower partition, which ensure that over the at least one water inlet opening the boiler supplied fresh water can not get directly into the temperature detection range, the temperature is detected by a temperature sensing element for controlling the the amount of fresh water supplied per unit time to the boiler.
- the upper partition wall can in this case sit over its entire length, but at least in one section, on the lower partition wall. This ensures that fresh water can not inadvertently get out of the fresh water supply area in the temperature detection range and also has the advantage that the boiler receives a particularly high mechanical stability.
- the at least one water inlet opening projecting from the bottom wall Wasserauf Economicselement is arranged.
- the fresh water can impinge on at least one water inlet opening to a Wasserauf Economicselement associated with the water inlet opening and be distributed by this over a considerable area of the fresh water supply area.
- the at least one water impact element has a water impact surface, which is aligned obliquely to the vertical and associated with a water inlet opening.
- the fresh water can drip from a water inlet opening on the water impact surface and be distributed by this in the fresh water supply area.
- at least one water deflection element protruding from the bottom wall is arranged in the fresh water supply region, offset from the at least one water inlet opening.
- the supplied fresh water within the fresh water supply area for example, meandering or zigzag be performed, so that the longest possible flow path and a maximum amount of fresh water on the way from the fresh water supply to the lower bottom wall portion of the boiler can evaporate without it mixes with the residual water located in the lower bottom wall section.
- the at least one Wasserumlenkelement is conveniently designed rib-shaped.
- several Wasserumlenkiata can be used, which are arranged at a distance from each other.
- the Wasserumlenkiata are configured rectilinearly, wherein they are aligned with their longitudinal axes obliquely to each other.
- the boiler has at least two water inlet openings, because thereby a predetermined amount of fresh water can be distributed particularly effectively over a large fresh water supply area in which the fresh water can evaporate.
- the at least two water inlet openings are arranged in the vertical direction at the same height. This ensures in a structurally simple way that the fresh water supplied to the boiler irrespective of which water inlet opening it enters the steam generating room, must practically cover a flow path of the same length within the boiler to get from the fresh water supply area in the lower bottom wall portion of the boiler can ,
- two water inlet openings are arranged mirror-symmetrically relative to one another with respect to a vertical center plane of the boiler.
- the fresh water supply area has two partial areas which are each assigned to a water inlet opening and separated from one another by means of an intermediate wall.
- the intermediate wall ensures that the fresh water supplied to a first subarea of the fresh water supply area can not reach the second subarea of the fresh water supply area directly.
- Each of the two water inlet openings is thus associated with a subregion of the fresh water supply region, via which the respective supplied fresh water can flow into the lower bottom wall section, wherein it at least partially evaporates on its flow path to the lower bottom wall section.
- the intermediate wall between the two subregions of the fresh water supply region is in an advantageous embodiment of the invention from the bottom wall and protrudes into the steam generating space and preferably extends from the lower partition wall to a side wall of the boiler.
- a first heating element which extends from the lower bottom wall section into the upper bottom wall section, is disposed on the outside of the bottom wall facing away from the steam generating chamber.
- the first heating element heats the bottom wall in both the lower bottom wall portion and the upper bottom wall portion. At least part of the supplied fresh water may evaporate on its way from the fresh water supply area to the lower bottom wall section, the remaining part of the fresh water forms within the boiler in the lower bottom wall section a residual amount of water which is continuously heated and thereby can evaporate.
- the first heating element is preferably configured such that it at least partially surrounds the temperature sensing element in the circumferential direction.
- the first heating element can be designed annular.
- the first heating element is arranged offset to the fresh water supply area.
- the first heating element does not directly heat the fresh water supply region but extends from the lower bottom wall section only into the temperature detection region of the upper bottom wall section. It has been shown that thereby the amount of steam deliverable per unit of time from the steam generator can be kept particularly low fluctuation.
- a second heating element is disposed on the outside of the bottom wall facing away from the steam generating space, which extends only in the lower bottom wall portion, but not in the upper bottom wall portion.
- the heating power acting on the bottom wall of the boiler can be concentrated on the lower bottom wall section and increased if necessary.
- Such a configuration has proven to be particularly advantageous when using the steam generator to provide steam for a steam iron.
- Figure 1 a front view of a steam generator according to the invention
- Figure 2 a side view in the direction of arrow A of Figure 1 on the
- Figure 3 is a perspective view of a lower boiler part together with two water inlet openings of an upper boiler part of the steam generator of Figure 1;
- Figure 4 is a sectional view of the water-filled steam generator along the line 4-4 in Figure 2;
- Figure 5 a sectional view of the steam generator along the line 5-5 of
- a steam generator 10 according to the invention is shown schematically.
- the steam generator 10 comprises a boiler 12 with a boiler shell 14 and a boiler base 16, which are screwed together by means of connecting screws 18 with the interposition of a sealing ring 20 and a steam generating space 22 surrounded.
- the boiler 12 is supported by the use of the steam generator 10 by a supporting device, not shown in the drawing, wherein the steam generator 10 assumes the position shown in the drawing in its normal position of use.
- the boiler lower part 16 comprises a bottom wall 24, from which a circumferential side wall 26 projects upwards, that is to say in the direction of the boiler upper part 14.
- the side wall 26 is integrally connected to the bottom wall 24 and has on its end face 28 an annular groove 30 which receives the sealing ring 20.
- the boiler shell 14 has a curved ceiling wall 32 which is surrounded by an annular flange 34.
- the annular flange 34 is seated on the end face 28 of the side wall 26 and is fixed by means of the connecting screws 18 on the end face 28.
- the bottom wall 24 is oriented obliquely to the horizontal in the position of use of the steam generator 10 shown in the drawing and comprises a lower bottom wall portion 36 and an upper bottom wall portion 38, which are arranged at different heights relative to the vertical.
- the inclination angle of the bottom wall 24 to the horizontal is in the normal position of use 20 ° to 40 °, in particular about 30 °.
- the upper bottom wall portion 38 is partitioned from a lower partition 40 into a fresh water supply portion 42 and a temperature detection portion 44.
- the lower partition wall 40 forms a separator that separates the fresh water supply portion 42 from the temperature detection portion 44.
- the lower partition 40 is arcuate, substantially horseshoe-shaped, configured and is from the bottom wall 24 into the interior of the boiler 12 from.
- the lower partition wall 40 has a first end 46 and a second end 48 arranged at the same height relative to the vertical, which release a wall opening 50 between them and are arranged in the boundary region between the upper bottom wall section 38 and the lower bottom wall section 36.
- the fresh water supply region 42 surrounds the lower dividing wall 40 in the upper bottom wall section 38 and is divided by an intermediate wall 52 into a first partial region 54 and a second partial region 56.
- the intermediate wall 52 extends from the lower partition 40 to the side wall 26 of the boiler base 16 and extends in a vertical center plane 58 of the boiler 12th
- the bottom wall 24 has a wedge-shaped water impingement element 60 or 62 on its upper side facing the steam generation chamber 22, which comprises an impingement surface 64 or 66 oriented obliquely to the vertical.
- the bottom wall 24 on its steam generating space 22 facing upper side in the two sub-areas 54, 56 of the fresh water supply portion 42 a plurality of rib-shaped Wasserumlenkiana 68 which are offset from one another and each configured elongated.
- the water diverting elements 68 define therebetween a zigzag flow path from the water landing members 60, 62 to the bottom bottom wall portion 36.
- first heating element 70 On its underside facing away from the steam generating chamber 22 bottom wall 24 carries a first heating element 70 and a second heating element 72, the each in a groove 74 and 76 of the bottom wall 24 are arranged.
- the first heating element 70 is substantially annular in shape and heats the bottom wall 24 in both the bottom bottom wall portion 36 and the top bottom wall portion 38.
- the second heating element 72 is substantially U-shaped and surrounds the first heating element 70 at the level of the bottom bottom wall portion 36 in FIG Circumferential direction over an angular range of about 180 °. By means of the second heating element 72, the heating power acting on the lower bottom wall section 36 can be increased.
- the first heating element 70 surrounds a temperature detection element, which in the illustrated embodiment is configured as a control thermostat 78 and fixed by means of fastening screws 80 on the underside of the bottom wall 24 facing away from the steam generation space 22.
- a control thermostat 78 By means of the control thermostat 78, the temperature of the bottom wall 24 in the temperature detection range 44 can be detected.
- the boiler shell 24 is penetrated by a first pipe section 82 and a second pipe section 84, which each form a water inlet opening, via which the steam generation space 22 fresh water can be supplied.
- the two pipe sections 82, 84 are vertically aligned in the normal position of use of the steam generator 10.
- the first tube piece 82 is aligned with the first water landing surface 66 and the second tube piece 84 is aligned with the second water landing surface 66.
- Fresh water can be supplied to the first subarea 54 of the fresh water supply region 42 via the first tube section 82, and fresh water can be supplied to the second subarea 56 of the fresh water supply region 42 via the second tube section 84.
- the fresh water in each case strikes a Wasserauf Economics Structure 64, 66, from which the fresh water is distributed over the respective sub-area 54 and 56, respectively. Due to the inclined to the horizontal orientation of the bottom wall 24 then flows the fresh water outside the temperature detection range 44 along the predetermined by the Wasserumlenk institute 68, zigzag flow path in the direction of the lower bottom wall portion 36, wherein it at least partially evaporated on the way from the Wasserauf Economics instituten 60, 62 to the lower bottom wall portion 36.
- the boiler shell 14 has a steam outlet 86, to which a solenoid valve 88 is connected.
- the solenoid valve 88 By means of the solenoid valve 88, the steam output of the steam generator 10 can be controlled.
- the pressure relief valve 92 forms a safety valve.
- the upper partition wall 94 extends in a portion adjacent to the vertical center plane 58 to the lower partition wall 40, on which it is seated. This ensures that the two pipe sections 82, 84 are separated from the remaining area of the steam generation space 22 by means of the lower partition wall 40 and the upper partition wall 94.
- the fresh water can be supplied to the steam generator 10 via a known per se and therefore not shown in the drawing to achieve a better overview pump.
- the pump is controlled by the control thermostat 78 controlled.
- the control thermostat 78 detects the temperature of the temperature detection range 44. This depends on the level of the boiler 12.
- Figure 4 shows the maximum level 96 of the boiler 12. At maximum level, the water in the boiler 12 reaches the control thermostat 78. This causes the temperature of the bottom wall 24 in the temperature detection range 44 decreases. The drop in temperature is detected by the control thermostat 78, which shuts off the pump on reaching a predetermined minimum temperature, so that the boiler 12 no further fresh water is supplied.
- the fresh water contained in the boiler 12 is evaporated so that 88 steam can be discharged through the steam outlet 86 and the solenoid valve.
- the level of the boiler 12 decreases, so that the water in the boiler 12 no longer reaches the control thermostats 78. This leads to an increase in the temperature of the bottom wall 24 in the temperature detection range 44.
- Upon reaching a predetermined maximum temperature of the control thermostat 78 turns on the pump again, so that the steam generating chamber 44 via the two pipe sections 82, 84 fresh water is supplied again.
- the fresh water meets the heated bottom wall 24 in the fresh water supply section 42, so that a part of the fresh water immediately evaporates, the remaining fresh water flows around the temperature detection section 42 into the lower bottom wall section 36, reaching the lower bottom wall section only after being previously heated. Since the fresh water can not get into the temperature detection area 44, the temperature detected by the control thermostat 78 is not affected by the fresh water flowing to the lower bottom wall portion 36. The temperature of the bottom wall 24 in the temperature detection range 44 thus does not depend on the flow path of the water and consequently not on the inclination of the steam generator 10.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2013/059964 WO2014183789A1 (en) | 2013-05-14 | 2013-05-14 | Steam generator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2997306A1 true EP2997306A1 (en) | 2016-03-23 |
Family
ID=48430801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13722455.6A Withdrawn EP2997306A1 (en) | 2013-05-14 | 2013-05-14 | Steam generator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2997306A1 (en) |
CN (1) | CN105229376B (en) |
WO (1) | WO2014183789A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016116631A1 (en) * | 2015-01-23 | 2016-07-28 | Koninklijke Philips N.V. | Steam generating system with detachable cover |
CN107559795A (en) * | 2017-09-29 | 2018-01-09 | 苏州德莱电器有限公司 | Steam appliance |
CN110553239B (en) * | 2019-07-17 | 2022-01-25 | 广东美的环境电器制造有限公司 | Steam generator and ironing device |
DE102020113674A1 (en) * | 2020-05-20 | 2021-11-25 | Miele & Cie. Kg | Method and control unit for providing steam in a steam boiler for an ironing device, steam supply device and ironing device |
CN112503502B (en) * | 2020-12-09 | 2022-05-06 | 江苏美的清洁电器股份有限公司 | Steam generator and electrical equipment |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3914683C2 (en) | 1989-05-03 | 1998-07-02 | Richard Dipl Phys Dr Buchmann | Small steam generator for operation with tap water |
FR2740537B1 (en) * | 1995-10-31 | 1998-01-16 | Seb Sa | STEAM GENERATOR WITH AUTOMATIC SUPPLY AND METHOD FOR MEASURING THE LIQUID LEVEL IN SUCH A GENERATOR |
IT1288957B1 (en) * | 1996-07-26 | 1998-09-25 | Esse 85 Srl | STEAM GENERATOR FOR IRON OR SIMILAR |
EP0855555A1 (en) * | 1997-01-23 | 1998-07-29 | Mauro Biancalani | Apparatus for the rapid production of steam to be supplied to irons or steam cleaners |
JP3292144B2 (en) * | 1998-06-23 | 2002-06-17 | 松下電器産業株式会社 | Iron |
TR201906715T4 (en) * | 2004-12-22 | 2019-05-21 | Koninklijke Philips Nv | Steam boiler for use in a steam generating device. |
CN101788137A (en) * | 2010-02-26 | 2010-07-28 | 周祥勋 | Industrial vaporization pot |
CN101922105A (en) * | 2010-04-20 | 2010-12-22 | 广东新宝电器股份有限公司 | Steam station electric iron |
-
2013
- 2013-05-14 WO PCT/EP2013/059964 patent/WO2014183789A1/en active Application Filing
- 2013-05-14 EP EP13722455.6A patent/EP2997306A1/en not_active Withdrawn
- 2013-05-14 CN CN201380076670.5A patent/CN105229376B/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2014183789A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105229376A (en) | 2016-01-06 |
WO2014183789A1 (en) | 2014-11-20 |
CN105229376B (en) | 2017-04-19 |
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