WO2011127620A1 - Chaudière - Google Patents

Chaudière Download PDF

Info

Publication number
WO2011127620A1
WO2011127620A1 PCT/CN2010/000474 CN2010000474W WO2011127620A1 WO 2011127620 A1 WO2011127620 A1 WO 2011127620A1 CN 2010000474 W CN2010000474 W CN 2010000474W WO 2011127620 A1 WO2011127620 A1 WO 2011127620A1
Authority
WO
WIPO (PCT)
Prior art keywords
boiler
horizontal portion
water
steam
heating means
Prior art date
Application number
PCT/CN2010/000474
Other languages
English (en)
Inventor
Cheungon Yeung
Original Assignee
Sun Cupid Industries Ltd.
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 Sun Cupid Industries Ltd. filed Critical Sun Cupid Industries Ltd.
Priority to PCT/CN2010/000474 priority Critical patent/WO2011127620A1/fr
Publication of WO2011127620A1 publication Critical patent/WO2011127620A1/fr

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
    • 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

Definitions

  • the present invention relates to a boiler for heating water and outputting steam.
  • Such a boiler is commonly known and typically used in various types of household appliances, including steam ironing devices, facial sauna devices, steam cleaning devices, coffee makers, steam ovens and breadmakers.
  • the boiler is generally arranged within the housing of the household appliance, and receives water from a water supply such as a tank and heating the water, and then outputs steam via a hose to the household appliance for further use.
  • EP 0821096 discloses a boiler which has an inclined bottom onto which a heating plate is externally mounted. As a result of the inclined configuration of the bottom of the boiler, it is ensured that the boiler always contains a quantity of water, so that the steam production is not subject to interruptions, even if the water level falls below a predetermined minimum level.
  • WO 2006/067722 discloses a boiler for heating water also, wherein the wall of the boiler housing, which is hot during operation of the boiler, is involved in the process of heating water entering the boiler space before this water l mixes with water which is already present in the boiler space. In this way, the steam production is not interrupted when this new supplied water mixes with the water which is already present in the boiler space.
  • the boiler disclosed in WO 2006/067722 still has an inclined configuration of the bottom of the boiler.
  • a boiler for heating water to generate steam and outputting steam comprises a boiler housing enclosing a boiler space, into which an inlet pipe extends through the wall of the boiler housing for feeding water therein from a water supply, and from which an outlet pipe extends through the wall of the boiler housing for outputting steam generated.
  • the bottom wall of the boiler comprises at least two horizontal portions having different levels.
  • a heating means is provided for each of the horizontal portions.
  • the inlet pipe is positioned so that water from the inlet pipe firstly flows onto the horizontal portion with the highest level and finally flows to the horizontal portion with the lowest level.
  • the bottom wall of the boiler is divided into at least two horizontal portions having different levels. Therefore, one or several steps will be defined by the horizontal portions. Therefore, when there is a need for new water after the startup phase during operation, water that is newly supplied to the boiler space will be firstly received on the horizontal portion with the highest level, where it is preliminarily heated by the heating means associated with the horizontal portion with highest level. Then, water flows through the horizontal portions with intermediate levels, if any, where it is further heated by the heating means associated with the horizontal portions with intermediate levels. When water that is newly supplied finally flows to the horizontal portion with lowest level, it has been already heated to a relatively high temperature. Therefore, this portion of new water with a relatively high temperature will mix up with water already contained within a recess defined by the horizontal portion with the lowest level, the step and the wall adjacent thereto. In this case, no interruption of steam generation will occur.
  • a sensor for detecting the temperature difference between the horizontal portion with the highest level and that with the lowest level can be used to detect the temperature variation on the top surface of the horizontal portion with the highest level.
  • the sensor triggers a signal demanding the water supply to resume the supply of water. In this way, the risk of water in the boiler is boiled dry is avoided.
  • the sensor is a negative temperature coefficient (NTC) sensor. With this sensor, the time of reactivating the pump and the volume of water resupplied can be more precisely controlled in a way of real time.
  • NTC negative temperature coefficient
  • the sensor can be, for example, arranged in the area of the horizontal portion with highest level.
  • the bottom wall of the boiler comprises only two horizontal portions, i.e., a first horizontal portion with a relatively low level and a second horizontal portion with a relatively high level.
  • the first horizontal portion occupies a relatively large area of the entire bottom wall.
  • the heating means associated with the first horizontal portion is always under working state. Therefore, most part of the bottom wall is heated, and the inside of the boiler is kept under a certain pressure so that generation and output of steam are facilitated.
  • the heating means associated with the first horizontal portion has a substantial C shape whereas the heating means associated with the first horizontal portion has a substantial U shape, and the U-shaped heating means is contained with the area of C-shape heating means.
  • FIG. 1 diagrammatically shows a steam ironing device comprising a boiler according to an embodiment of the present invention
  • Figure 2 diagrammatically shows the plan view of the boiler from bottom side;
  • Figure 3 is the perspective view of the lower part of the boiler from top side;
  • Figure 4 is the perspective view of the lower part of the boiler from bottom side.
  • FIG. 1 diagrammatically shows a steam ironing device 100 comprising a boiler 20 according to an embodiment of the present invention.
  • the boiler 20 comprises a boiler housing enclosing a boiler space 30 therein.
  • the boiler housing preferably made of stainless steel, is formed by two parts, i.e, an upper part 1 and a lower part 2 as shown.
  • the two parts 1, 2 are connected to each other by means of a suitable connecting method, for example by means of welding.
  • a suitable connecting method for example by means of welding.
  • the boiler 20 further comprises an output pipe 11 for outputting the steam generated inside the boiler 20 to the steam iron 10 of the steam ironing device 100.
  • the output pipe 11 is generally place at the upper part 1.
  • a magnetic valve 12 is placed in the output pipe 11 for steam release.
  • FIG. 1 shows a water supply unit, in which a water pipe 14 supplies water from a water tank 17 to the boiler space 30 via an inlet fitting 13. Pump 19 connects the water pipe 14 and an outlet line 18 of the water tank 17 so as to drive the flow of water.
  • the water supply unit further includes a return valve 15 and a return line 16. This unit, together with the output pipe 11 and magnetic valve 12 as mentioned above, is already known in the art, and thus the detailed structure and function thereof are omitted here for the sake of conciseness.
  • the boiler 20 is oriented such that the bottom wall of the lower part 2 of the boiler housing is in the horizontal direction.
  • the bottom wall of the lower part 2 is divided, in this embodiment as shown in Fig. 1, into two horizontal portions, i.e., the first horizontal portion 24 and the second horizontal portion 26.
  • the two horizontal portions are positioned in different levels.
  • the second horizontal portion 26 is higher than the first horizontal portion 24.
  • a step 22 is formed between the two horizontal portions.
  • a recess 35 is defined by the step 22 and the side wall of the lower part 2.
  • the level difference between the two portions or the height of the step 22 can be selected from a range of 0.2 to 30 mm.
  • the step 22 is made as gradually inclined to ensure a smooth and quiet flow of water from the second horizontal portion 26 to the first horizontal portion 24.
  • the position of the second horizontal portion 26 is such selected that water from the water fitting 13 will firstly flow onto the second horizontal portion 26, and then flow along the step 22 to the first horizontal portion 24.
  • Figs. 2 and 4 show the bottom surface of the bottom wall of the lower part 2 in a plan view and a perspective view respectively.
  • a first heating plate 3 and a second heating plate 7, both of which can be made of aluminum for example, are respectively mounted on the bottom surface, for example by means of bolts, in the areas corresponding to the first horizontal portion 24 and the second horizontal portion 26.
  • a groove 32 is formed between the two heating plates 3, 7 so as to isolate the possible heating conduction therebetween.
  • a first heating means 4 and a first temperature controller 5 for controlling the heating energy provided by the first heating means 4 are positioned on the first heating plate 3 .
  • the first heating means 4 is a substantially C-shaped heating pipe arranged along the peripheral part of the bottom surface of the lower part 2 so as to provide an approximately even heating effect for the boiler.
  • the second heating means 6 is a substantially U-shaped heating pipe to provide an even heating effect.
  • the U-shaped second heating means 6 is substantially contained within the C-shape first heating means 4.
  • water can flow to the recess 35 from the second horizontal portion 26 more steadily and evenly.
  • the second horizontal portion 26 can be formed as an island entirely surrounded by the first horizontal portion 24.
  • both of the first and second heating means 4, 6 can be formed as ring shape, with the second heating means 6 located within the first heating means 4.
  • the pump 19 pumps a suitable volume of water from the tank 17 to the boiler space 30 via the water pipe 14 and the inlet fitting 13. Due to the alignment of the inlet fitting 13 with the second horizontal portion 26, water will firstly flow onto the second horizontal portion 26 and then flow along the step 22 to the first horizontal portion 24. Water should be supplied so that it not only fills the recess 35 but also submerges the top surface of the second horizontal portion 26.
  • the pump 19 is deactivated so that the supply of water is cut off after a certain time.
  • the first heating means 4 and the second heating means 6 are switched on immediately after the startup phase, and heat the water contained within the boiler space 30.
  • the first heating means 4 continuously heat water in the recess 35, so that this volume of water is always under a state of being heated. Therefore, the inside of the boiler is kept under a certain pressure so that output of steam is facilitated. At the same time, water in the recess 35 is always heated, thus causing the steam can be generated steadily.
  • a sensor 9 is arranged on the second heating plate 7 for detecting the temperature difference between the first heating means 4 and the second heating means 6.
  • the sensor 9 is a Negative Temperature Coefficient (NTC) sensor.
  • the second horizontal portion 26 Since the second horizontal portion 26 is at a higher level than the first horizontal portion 24, it is always the water in the area of the second horizontal portion 26 will be dried out first. In this case, the temperature in the area of the second horizontal portion 26 will be higher than that in the area of the first horizontal portion 24.
  • the temperature difference can be detected by the NTC sensor 9, and further sent to a controller (not shown).
  • the pump 19 When the temperature difference is beyond a certain threshold value, say 25 degree C, the pump 19 is activated accordingly to supply additional water into the boiler space 30. Water will flow onto the second horizontal portion 26 directly due to the alignment of the inlet fitting 13 and the second horizontal portion 26, thus reducing the temperature on the second horizontal portion 26 and avoiding the risk of water dry-out. When sufficient volume of water is supplied, the temperature in the area of the second horizontal portion 26 will be reduced, therefore causing the temperature difference is below the threshold value. In this case,. the pump 19 is deactivated again.
  • the boiler according to the present invention includes two horizontal portions 24, 26, its variations including more than three horizontal portions are obvious to one of ordinary skills in the art.
  • water will flow onto the horizontal portion with the highest level, then to the horizontal portion with the intermediate level, and finally to the horizontal portion with the lowest level.
  • water will be preliminarily heated twice before mixing up with water already present in the recess 35. As such, the temperature difference between the water newly supplied and the water already present is further reduced, thus decreasing the possibility of interruption of steam generation.
  • the senor 9 can be set to detect the temperature variation of the horizontal portion with the highest level, instead of the temperature difference between the horizontal portions with the highest level and that with the lowest level. In this case, as long as water on the top surface of the horizontal portion with the highest level is boiled dry and causes the temperature of the horizontal portion with the highest level higher than a predetermined value, the sensor triggers a signal demanding the water supply to resume the supply of water.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Textile Engineering (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)
  • Cookers (AREA)

Abstract

L'invention concerne une chaudière (20) permettant de chauffer de l'eau pour produire et évacuer de la vapeur et un appareil ménager (100) la contenant. La chaudière (20) comprend un logement de chaudière entourant un espace chaudière (30) dans lequel l'eau entre et la vapeur est produite par chauffage. La paroi inférieure de la chaudière (20) comprend au moins deux parties horizontales (24, 26) à différents niveaux. Le tuyau d'entrée (13) permettant d'introduire de l'eau est aligné avec la partie horizontale (26) la plus haute. Un capteur (9) permet de détecter la différence de température entre la partie horizontale (26) la plus haute et celle (24) la plus basse, ou de détecter la variation de température sur la surface supérieure de la partie horizontale (26) la plus haute. Cette conception évite le risque de laisser s'évaporer toute l'eau par ébullition, la production de vapeur ne sera ainsi pas interrompue.
PCT/CN2010/000474 2010-04-12 2010-04-12 Chaudière WO2011127620A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/000474 WO2011127620A1 (fr) 2010-04-12 2010-04-12 Chaudière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/000474 WO2011127620A1 (fr) 2010-04-12 2010-04-12 Chaudière

Publications (1)

Publication Number Publication Date
WO2011127620A1 true WO2011127620A1 (fr) 2011-10-20

Family

ID=44798236

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/000474 WO2011127620A1 (fr) 2010-04-12 2010-04-12 Chaudière

Country Status (1)

Country Link
WO (1) WO2011127620A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109519910A (zh) * 2017-09-19 2019-03-26 焦武军 一种分区精准传热的节能型快组装锅炉
EP3913282A1 (fr) * 2020-05-20 2021-11-24 Miele & Cie. KG Procédé et unité de commande permettant de fournir de la vapeur dans une chaudière à vapeur pour un dispositif de repassage, dispositif de fourniture de vapeur et dispositif de repassage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638684A1 (fr) * 1993-08-06 1995-02-15 Moulinex S.A. Générateur de vapeur pour fer à repasser
EP0821096A1 (fr) * 1996-07-26 1998-01-28 ESSE85 S.r.l. Générateur de vapeur pour fers à repasser ou similaire
WO2006006187A1 (fr) * 2004-07-12 2006-01-19 Dierre Finanziaria S.P.A. Dispositif a vapeur destine particulierement a des appareils domestiques electriques
CN2937201Y (zh) * 2006-06-12 2007-08-22 张平 一种蒸汽电熨斗
CN101084398A (zh) * 2004-12-22 2007-12-05 皇家飞利浦电子股份有限公司 在蒸汽产生设备中使用的汽锅

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638684A1 (fr) * 1993-08-06 1995-02-15 Moulinex S.A. Générateur de vapeur pour fer à repasser
EP0821096A1 (fr) * 1996-07-26 1998-01-28 ESSE85 S.r.l. Générateur de vapeur pour fers à repasser ou similaire
WO2006006187A1 (fr) * 2004-07-12 2006-01-19 Dierre Finanziaria S.P.A. Dispositif a vapeur destine particulierement a des appareils domestiques electriques
CN101084398A (zh) * 2004-12-22 2007-12-05 皇家飞利浦电子股份有限公司 在蒸汽产生设备中使用的汽锅
CN2937201Y (zh) * 2006-06-12 2007-08-22 张平 一种蒸汽电熨斗

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109519910A (zh) * 2017-09-19 2019-03-26 焦武军 一种分区精准传热的节能型快组装锅炉
EP3913282A1 (fr) * 2020-05-20 2021-11-24 Miele & Cie. KG Procédé et unité de commande permettant de fournir de la vapeur dans une chaudière à vapeur pour un dispositif de repassage, dispositif de fourniture de vapeur et dispositif de repassage

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