EP1617141A1 - Gas combustion device - Google Patents

Gas combustion device Download PDF

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Publication number
EP1617141A1
EP1617141A1 EP04717832A EP04717832A EP1617141A1 EP 1617141 A1 EP1617141 A1 EP 1617141A1 EP 04717832 A EP04717832 A EP 04717832A EP 04717832 A EP04717832 A EP 04717832A EP 1617141 A1 EP1617141 A1 EP 1617141A1
Authority
EP
European Patent Office
Prior art keywords
combustion
gas
combustion gas
air
discharged
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Withdrawn
Application number
EP04717832A
Other languages
German (de)
English (en)
French (fr)
Inventor
Shinji c/o MIKUNI CORP. KOKUO
Katsunori Iwaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RE-TEC Inc
Re Tec Inc
Original Assignee
RE-TEC Inc
Re Tec Inc
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 RE-TEC Inc, Re Tec Inc filed Critical RE-TEC Inc
Publication of EP1617141A1 publication Critical patent/EP1617141A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/70—Baffles or like flow-disturbing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/06—Hot-air producers heated otherwise than electrically; ventilated by muscle power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00—Hair drying devices; Accessories therefor
    • A45D20/04—Hot-air producers
    • A45D20/06—Hot-air producers heated otherwise than electrically; ventilated by muscle power
    • A45D2020/065—Hot-air producers heated otherwise than electrically; ventilated by muscle power heated by gas or fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/20—Burner staging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular

Definitions

  • the present invention relates to a gas combustion device for generating completely burnt hot air or warm air with high combustion efficiency using burning flame caused by, in particular, Liquefied Petroleum Gas (LPG) as a heat source.
  • LPG Liquefied Petroleum Gas
  • a combustor for burning combustion gas for example, LPG
  • the combustor bums the combustion gas supplied from a gas tank as a source for the combustion gas and the air heated in a combustion chamber of the combustor is emitted to the side of a vent by a fan provided at the side of an inlet of the casing.
  • LPG as combustion gas is supplied from the gas tank to an ejector provided at the combustor.
  • the ejector In the ejector, outside air necessary for combustion is sucked and mixed gas which consists of the combustion gas and the sucked air is generated. Thereafter, the mixed gas is injected from a wick (wire mesh) provide at the side of the inlet of the combustor. A spark is blown from an ignition plug (ignitor) to the wick and ignites the mixed gas.
  • the temperature of the combustion gas generated from the combustor tends to become high at its center part and low at its peripheral part.
  • outside air sent from an air-blower such as the fan provided at the hair drier passes laterally to the air heated by the combustor, causing the problem that the temperature of warm air at the center part becomes higher and the temperature of warm air at the peripheral part becomes lower.
  • the present invention intends to provide a gas combustion device in which the temperature of warm air of the combustion gas discharged from the combustor is uniformed and which has high safety by preventing burst-out of burning flame.
  • a gas combustion device comprises a combustion chamber for burning gas supplied from a gas source therein, a combustion gas vent for discharging combustion gas burnt in the combustion chamber, and a baffle member for adjusting distribution the combustion gas discharged from the combustion gas vent which is arranged at the combustion gas vent.
  • a gas combustion device 1 in accordance with this embodiment has an ejector 3 for generating mixed gas consisting of LPG, for example, as combustion gas and air, an electrode 5 as an ignitor for igniting the mixed gas generated by the ejector 3 and a combustor 7 for burning the mixed gas ignited by the electrode 5 therein.
  • a chamber 9 of the combustor 7 made of aluminum (die-cast) is a substantially cylindrical body with circular right and left side faces in the longitudinal direction of the chamber 7 in this embodiment as shown in Figs. 5 and 6.
  • the inside of the chamber 9 is comprised of a primary combustion chamber 11 located on the right side in Fig. 1 and a secondary combustion chamber 13 located ahead of the primary combustion chamber 11 (left side in Fig. 1).
  • the ejector 3 is attached to the gas induction side in the rear of the primary combustion chamber 11 (right side in Fig. 1).
  • the ejector 3 is provided with a nozzle 19 for injecting gas supplied from a gas source such as a gas tank (not shown) for storing combustion gas such as LPG through a gas supply pipe 17 as a gas passage at the side of an inlet of a substantially cylindrical ejector body 15 having a circular cross section (right side in Fig. 1).
  • the injection hole is an orifice formed substantially in the center of a disc-like pin-hole disc (not shown) and LPG is thinly discharged at high speed close to sonic speed.
  • a filter (not shown) for removing impurities and dusts which block the injection hole is provided in the nozzle 19. For example, a sintered metal with a pinhole having a diameter of 10 to 30 ⁇ m is used as the filter.
  • a mixer 21 for mixing the combustion gas (LPG) with a primary air and introducing the mixed gas into the combustor 7 is provided in the ejector body 15 ahead of the nozzle 19 and a primary air hole 23 for sucking the primary air penetrates a side wall of the mixer 21. Accordingly, the pressure in the mixer 21 becomes negative due to the combustion gas (LPG) discharged from the nozzle 19 at high speed, and the primary air is sucked from the outside. The sucked primary air is sent to a forward wick 25 as a gas combustion part while being mixed with the discharged combustion gas. This is called as an ejector effect.
  • the ratio of the primary air can be adjusted.
  • the wick 25 as the gas combustion part is a cylindrical SUS metal mesh of 50 to 150 mesh, for example.
  • the wick 25 is attached to the end ahead of the ejector body 15 by welding or the like substantially in the center of the right half of the primary combustion chamber 11 of the combustor 7 in Fig. 1.
  • a wick holder 27 as a direct-advance suppression part is attached to the end ahead of the wick 25 by welding or the like.
  • the mixed gas discharged from the mixer 21 is guided mainly laterally (the direction shown by an arrow AR1 in Fig. 1) by the wick holder 27 and the mixed gas of the combustion gas (LPG) and air is discharged from the mesh of the wick 25.
  • the flame after ignition is blue and substantially circular.
  • the electrode 5 is provided within the combustor 7 and ahead of the wick 25 and in the vicinity of the side face of the wick 25.
  • High-tension electricity generated in a piezoelectric element for ignition (not shown) is input to the electrode 5 through an electric wire 29 and a spark is blown from the front end of the electrode 5 to the wick 25.
  • the spark ignites the mixed gas discharged from the wick 25, thereby burning the mixed gas.
  • a plurality of groove parts 31 extending in the forward-rearward direction are radially arranged around the wick 25.
  • six groove parts 31 are formed.
  • a plurality of secondary air holes 33 for supplying outside air (secondary air) to the primary combustion chamber 11 are provided on a rear wall (right side wall in Fig. 1) of the primary combustion chamber 11.
  • the plurality of secondary air holes 33 are disposed so that the secondary air is supplied to the mixed gas after ignition at the position other than an ignition point.
  • the ignition point means the area where a spark generated by the electrode 5 can reach at the side of the electrode 5 in the periphery of the wick 25 as shown by an area surrounded by a dotted line in Fig. 5.
  • five secondary air holes 33 are provided.
  • a plurality of tertiary air ducts 35 as tertiary air holes for supplying outside air (tertiary air) to the secondary combustion chamber 13 are provided in the wall of the primary combustion chamber 11 between adjacent groove parts 31.
  • six tertiary air ducts 35 in total are provided.
  • a front end of the secondary combustion chamber 13 is opened and the opening forms a combustion gas vent 37 for discharging the combustion gas burnt in the secondary combustion chamber 13.
  • a plurality of fins 39 for heat exchange are provided in the outer periphery of the chamber 9.
  • the fins 39 has the effect of emitting heat generated when the mixed gas is burnt in the chamber 9 and cooling the chamber 9, that is, performing heat exchange.
  • a baffle plate 41 as the baffle member is a partition for adjusting distribution of the combustion gas discharged from the combustion gas vent 37 and attached with a claw part 43 which protrudes from the end face of the chamber 9, for example, so as to cover the whole of the combustion gas vent 37.
  • the baffle plate 41 As shown in Figs. 3A and 3B, the baffle plate 41, the periphery of which is substantially circular, is shaped like a circular disc and notched parts 45 each engaging with the claw part 43 are provided on four positions on the periphery.
  • the baffle plate 41 is comprised of a center discharge hole 47 provided at about the center thereof and periphery discharge holes 49 provided on a virtual circle 51 surrounding the center discharge hole 47.
  • the center discharge hole 47 controls the direction of discharging the combustion gas so that the combustion gas in the secondary combustion chamber 13 is discharged from about the center of the combustion gas vent 37.
  • the periphery discharge holes 49 control the direction of discharging the combustion gas so that the combustion gas is discharged from the part close to the inner wall of the secondary combustion chamber 13.
  • the center discharge hole 47 is a substantially circular through hole provided at about the center of the baffle plate 41 and the periphery discharge holes 49 are four elongated holes provided along the virtual circle 51 near the outer periphery of the baffle plate 41.
  • the center discharge hole 47 is smaller than the periphery discharge hole 49 and most of the combustion gas is discharged from the periphery discharge holes 49.
  • the shape of the center discharge hole 47 and the periphery discharge holes 49 is not limited to the above-mentioned shape.
  • the periphery discharge holes 49 may be serially arranged along the virtual circle 51 near the outer periphery of the baffle plate 41 as a lot of circular through holes or may be formed in the other shape.
  • the center discharge hole 47 may be formed to be smaller, formed as a plurality of holes or formed in the other shape.
  • the primary air necessary for combustion is automatically sucked. Furthermore, by making the diameter of the primary air hole 23 small to decrease the amount of the primary air, the mixed gas with good ignitability is injected to the forward wick 25.
  • the combustion gas (mixed gas) is mainly injected from the SUS metal mesh on the side face to the periphery.
  • the mixed gas emitted from the wick 25 has good ignitability because of high gas ratio. Since the secondary air is supplied to the combustion gas after ignition from the secondary air hole 23, combustion efficiency of the gas in the primary combustion chamber 11 is improved, thereby improving combustion performance.
  • tertiary air since outside air of much cooler than the mixed gas during combustion (tertiary air) passes through the six tertiary air ducts (tertiary air holes) 35, the temperature at the wall part of the primary combustion chamber 11 is effectively decreased. While the tertiary air supplied from the outside cools the wall part of the primary combustion chamber 11, the tertiary air exchanges heat with the wall part of the primary combustion chamber 11. Thus, the tertiary air is heated to high temperature while it passes through the tertiary air ducts 35. This heated tertiary air is introduced into the secondary combustion chamber 13. For this reason, combustion reaction of the gas in the secondary combustion chamber 13 is further promoted, thereby improving combustion performance. That is, since the gas burnt in the primary combustion chamber 11 and the hot tertiary air are mixed, combustion reaction easily occurs and complete combustion is promoted. This further improves combustion performance.
  • the baffle plate 41 is provided at the combustion gas vent 37 of the combustor 7, the combustion gas in the secondary combustion chamber 13 is discharged from the center discharge hole 47 and the periphery discharge holes 49. As a result, a difference in temperature between the center part and the peripheral part of the combustion gas is decreased. That is, the temperature of the combustion gas discharged from the combustor 7 is uniformed.
  • the center discharge hole 47 is formed to be smaller than the periphery discharge hole 49, most of the combustion gas is discharged from the periphery discharge holes 49 and a small amount of the combustion gas is discharged from the center discharge hole 47. For this reason, the combustion gas easily spreads over the discharged warm air. Thus, a difference in temperature between the center part and the peripheral part of the warm air becomes small.
  • the combustion gas is discharged from the periphery discharge holes 49 at the side of the periphery of the combustion gas vent 37, even when a large amount of the combustion gas and the burning flame occur in the primary combustion chamber 11 and the secondary combustion chamber 13, they are mixed with the peripheral air in the vicinity of the combustion gas vent 37, thereby that the burning flame is difficult to go outwards. Therefore, since the baffle plate 41 also suppresses burst-out of the burning flame, safety of the combustion device is improved.
  • the present invention is not limited to the above-mentioned embodiments and can be carried out according to the other aspects by making appropriate modifications.
  • the gas combustion device 1 in accordance with this embodiment can be used as the gas combustion device such as a hair drier and a heat gun used for compression operation of a heat-shrinkable tube, drying, adhesion, fusing and soldering and the other gas combustion devices such as the other appliances.
  • the baffle member is provided at the combustion gas vent of the combustor, the temperature of the combustion gas discharged from the combustor can be uniformed and burst-out of the burning flame can be prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Incineration Of Waste (AREA)
EP04717832A 2003-03-10 2004-03-05 Gas combustion device Withdrawn EP1617141A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003063730 2003-03-10
PCT/JP2004/002807 WO2004081447A1 (ja) 2003-03-10 2004-03-05 ガス燃焼装置

Publications (1)

Publication Number Publication Date
EP1617141A1 true EP1617141A1 (en) 2006-01-18

Family

ID=32984440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04717832A Withdrawn EP1617141A1 (en) 2003-03-10 2004-03-05 Gas combustion device

Country Status (9)

Country Link
US (1) US20060183067A1 (ko)
EP (1) EP1617141A1 (ko)
JP (1) JPWO2004081447A1 (ko)
KR (1) KR100669221B1 (ko)
CN (1) CN1759273A (ko)
AU (1) AU2004219830B2 (ko)
CA (1) CA2518429A1 (ko)
TW (1) TW200506279A (ko)
WO (1) WO2004081447A1 (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5353822B2 (ja) 2009-09-30 2013-11-27 株式会社Ｉｈｉ 着火装置
US9677760B2 (en) 2011-01-28 2017-06-13 Osaka Gas Co., Ltd. Furnace heating combustion apparatus
KR101234300B1 (ko) 2011-05-20 2013-02-18 조승범 가스 믹서
EP3006826B1 (en) * 2014-10-10 2017-05-03 WORGAS BRUCIATORI S.r.l. Burner
CN104964435A (zh) * 2015-05-22 2015-10-07 芜湖鸣人热能设备有限公司 双层储热型锅炉
GB2556840A (en) * 2015-10-01 2018-06-06 David & D Ltd Hot air blower and blowing method
CN107664306A (zh) * 2016-07-28 2018-02-06 朱绍华 二次进风高效燃烧器
CN108087878B (zh) * 2016-11-21 2019-10-18 爱烙达股份有限公司 具有自冷系统的热风枪
JP7014632B2 (ja) * 2018-02-21 2022-02-01 川崎重工業株式会社 バーナ装置
CN116608474A (zh) * 2023-05-29 2023-08-18 中城建胜义(深圳)环境科技有限公司 用于处理园林绿化垃圾炭化热解气的燃烧装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726027A (en) * 1928-07-05 1929-08-27 Robert H Johnson Combined burner and scraper
JPS6349138U (ko) * 1986-09-18 1988-04-02
FR2635169B1 (fr) * 1988-08-02 1990-11-09 Guilbert Express Sa Generateur d'air chaud a gaz
JP3500704B2 (ja) * 1994-06-21 2004-02-23 松下電器産業株式会社 携帯用ヘアードライヤ
US6534020B1 (en) * 1997-07-09 2003-03-18 Garlock Equipment Co. Fume recovery methods
US5987771A (en) * 1997-12-05 1999-11-23 Curtin; Jason Quinn Scent charged aeration capsule assembly for hair blower
DE19808819A1 (de) * 1998-03-03 1999-09-09 Utec Luftreinigung & Waermerue Verbrennungsofen für Abgase
US5996243A (en) * 1998-09-18 1999-12-07 Chang; Chih-Chang Hair dryer
JP2000266409A (ja) * 1999-03-16 2000-09-29 Toyo Koatsu:Kk コードレス熱送風器
JP4050001B2 (ja) * 2001-02-09 2008-02-20 株式会社 リーテック ガス燃焼式のヘアードライヤー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004081447A1 *

Also Published As

Publication number Publication date
US20060183067A1 (en) 2006-08-17
KR20050119114A (ko) 2005-12-20
TW200506279A (en) 2005-02-16
KR100669221B1 (ko) 2007-01-16
JPWO2004081447A1 (ja) 2006-06-15
AU2004219830A1 (en) 2004-09-23
CN1759273A (zh) 2006-04-12
AU2004219830B2 (en) 2007-03-15
CA2518429A1 (en) 2004-09-23
WO2004081447A1 (ja) 2004-09-23

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