EP2937631B1 - Gas hot air gun head - Google Patents

Gas hot air gun head Download PDF

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Publication number
EP2937631B1
EP2937631B1 EP14181364.2A EP14181364A EP2937631B1 EP 2937631 B1 EP2937631 B1 EP 2937631B1 EP 14181364 A EP14181364 A EP 14181364A EP 2937631 B1 EP2937631 B1 EP 2937631B1
Authority
EP
European Patent Office
Prior art keywords
hot air
holes
air gun
gun head
gas hot
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.)
Active
Application number
EP14181364.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2937631A1 (en
Inventor
Cheng-nan YANG
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.)
Pro Iroda Industries Inc
Original Assignee
Pro Iroda Industries 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.)
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Publication date
Application filed by Pro Iroda Industries Inc filed Critical Pro Iroda Industries Inc
Publication of EP2937631A1 publication Critical patent/EP2937631A1/en
Application granted granted Critical
Publication of EP2937631B1 publication Critical patent/EP2937631B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F23D14/28—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
    • 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
    • F23D14/38—Torches, e.g. for brazing or heating
    • 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
    • F23D14/465—Details for torches
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns

Definitions

  • the present invention relates to a gas hot air gun head and, particularly, to a gas hot air gun head including a flow-guiding device and preventing combustion flames from stretching out of the flow-guiding device.
  • TW Patent No. 1261100 entitled improved nozzle of gas hot air tool, shows an improved nozzle of a gas hot air tool including a body, a blower, an ignition device, a switch set, and a nozzle.
  • the body includes a tube part and a stem part.
  • the inside of the tube part is installed with a heating chamber and a mixing chamber.
  • the blower and the ignition device are installed in the tube part.
  • the inside of the stem part is installed with a gas can.
  • the nozzle includes a plurality of nozzle holes.
  • the switch set is turned on for the fluid in the gas can to flow into the nozzle and inject into the mixing chamber through the nozzle holes. Before entering the heating chamber, the fluid is mixed thoroughly with air to form a combustion gas in order to achieve thorough combustion in the heating chamber.
  • the present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
  • US 4 726 767 A discloses a gas hot air gun head comprising: a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from the fluid inlet end to the fluid outlet end; a flow-guiding device connecting to the fluid outlet end of the fuel supply device and including a combustor, with the combustor connecting to the fuel supply device, with the combustor including a combustion chamber extending therethrough, with the combustion chamber including first and second flow-guiding plates engaging therein and separating from each other in an axial direction, with the first flow-guiding plate including a plurality of first holes extending therethrough, with the second flow-guiding plate including a plurality of second holes extending therethrough, and with a centerline of one of the plurality of first holes offsetting from centerlines of the plurality of second holes.
  • a fuel supply device engagable with a gas reservoir and having a fluid inlet end, a fluid outlet end and a channel extending from
  • a gas hot air gun head includes the features as defined in claim 1. It is therefore an objective of the present invention to provide a gas hot air gun head that prevents combustion flames from stretching out of the flow-guiding device.
  • FIGs. 1 through 6 show a gas hot air gun including a gas hot air gun head 10 in accordance with the present invention and a gas cartridge 90 engaging with the gas hot air gun head 10.
  • the gas hot air gun head 10 includes a fuel supply device 20 engagable with the gas reservoir 90.
  • the fuel supply device 20 has a fluid inlet end 21, a fluid outlet end 22 and a channel 23 extending from the fluid inlet end 21 to the fluid outlet end 22.
  • the gas hot air gun head 10 engages with the gas reservoir 90 by engaging the fuel supply device 20 with the gas reservoir 90.
  • the gas hot air gun head 10 can draw fuel in the gas reservoir 90 by the fuel supply device 20.
  • the fuel supply device 20 has a controller which controls the flow output rate of fuel in the gas reservoir 90. The controller can be changed to a position in which fuel in the gas reservoir 90 is stopped from flowing into the fuel supply device 20.
  • the fuel supply device 20 includes a plug 24 disposed in the channel 23.
  • the plug 24 has a first end 241 and a second end 242 opposite the first end 241 and includes a partition 243 separating and blocking connection of the first and second ends 241 and 242.
  • the plug 24 includes first and second orifices 244 and 245 receiving two ends of a preheater 25.
  • the preheater 25 is disposed outside the plug 24.
  • the preheater 25 interconnects the first and second ends 241 and 242 of the plug 24.
  • the first orifice 244 is disposed adjacent to the first end 241.
  • the second orifice 245 is disposed adjacent to the second end 242.
  • the second end 242 of the plug 24 is adjacent to the fluid outlet end 22.
  • the preheater 25 has a tubular structure.
  • the preheater 25 extends in a direction away from the fluid inlet end 21. Further, a spray head 26 engages with the second end 242 of the plug 24.
  • the gas hot air gun head 10 includes a flow-guiding device 30 connecting to the fuel supply device 20.
  • the fuel supply device 20 includes an extension tube 27 interconnecting the fuel supply device 20 and the flow-guiding device 30.
  • the flow-guiding device 30 connects to the fluid outlet 22 end of the fuel supply device 20.
  • the gas hot air gun head 10 draws fuel in the gas reservoir 90 to the flow-guiding device 30 by the fuel supply device 20.
  • the fuel flows out of the gas reservoir 90, enters the fuel supply device 20 through the fluid inlet end 21, travels in the channel 23, leaves the fuel supply device 20 through the fluid outlet end 22, and enters the flow-guiding device 30.
  • the flow-guiding device 30 includes a combustor 31, an inner barrel 32 and an outer barrel 33 enclosing the inner barrel 32.
  • the combustor 31 connects to the fuel supply device 20.
  • the combustor31 has a first end 311 and a second end 312 opposite the first end 311.
  • the combustor 31 includes the first end 311 engaging with one of two opposite ends of the extension tube 27.
  • the extension tube 27 has the other of two opposite ends fitted to the fluid outlet end 22.
  • the extension tube 27 and the combustor 31 are in thread engagement.
  • a retainer 28 retains the extension tube 27 to the fluid outlet end 22, with the retainer 28 secured to the fluid outlet end 22 and including an edge blocking and abutting against a peripheral edge of the extension tube 27.
  • the retainer 28 and the fluid outlet end 22 are in thread engagement.
  • the spray head 26 has an end inserted into and in fluid communication with a hollow of the extension tube 27.
  • the combustor 31 includes a combustion chamber 313 extending therethrough.
  • the combustion chamber 313 extends through the first and second ends 311 and 312 of the combustor 31.
  • the combustion chamber 313 includes first and second flow-guiding plates 34 and 35 engaging therein and separating from each other in an axial direction.
  • the first flow-guiding plate 34 is disposed adjacent to the first end 311 of the combustor31.
  • the second flow-guiding plate 35 is disposed adjacent to the second end 312 of the combustor31.
  • the combustion chamber 313 has an inner periphery and each of the first and second flow-guiding plates 34 and 35 includes a peripheral edge thereof abutting against the inner periphery, with no gap between the inner periphery and the peripheral edge of the first flow-guiding plate, and with no gap between the inner periphery and the peripheral edge of the second flow-guiding plate.
  • the first flow-guiding plate 34 includes a plurality of first holes 341 extending therethrough.
  • the second flow-guiding plate 35 includes a plurality of second holes 351 extending therethrough. Hot air in the combustion chamber 313 passes the first flow-guiding plate 34 through the plurality of first holes 341. Moreover, hot air in the combustion chamber 313 passes the second flow-guiding plate 35 through the plurality of second holes 351.
  • a centerline of one of the plurality of first holes 341 offsets from centerlines of the plurality of second holes 351.
  • the centerline of one of the plurality of first holes 341 is in non-coaxial relationship with the centerlines of any of the plurality of second holes 351.
  • Each of the plurality of first holes 341 has a first diameter D1.
  • Each of the plurality of second holes has a second diameter D2.
  • the first diameter D1 is not equal to the second diameter D2.
  • the second diameter D2 is shorter than the first diameter D1.
  • the second flow-guiding plate 35 has a plurality of third holes 352 extending therethrough. Hot air in the combustion chamber 31 passes the second flow-guiding plate 35 through the plurality of third holes 352.
  • a centerline of one of the plurality of third holes 352 offsets from centerlines of the plurality of first holes 341.
  • the plurality of second and third holes 351 and 352 are alternatively disposed.
  • the plurality of second and third holes 351 and 352 are disposed radially with respect to a center of the second flow-guiding plate 35.
  • Each of the plurality of third holes 352 has a third diameter D3.
  • the third diameter D3 is shorter than the second diameter D2.
  • Each of the plurality of first, second and third holes 341, 351, and 352 is of circular shape.
  • the number of the plurality of second holes 351 is less than the number of the plurality of first holes 341.
  • the number of plurality of second holes 351 equals to the number of plurality of third holes 352. Hot air flows through the first and second flow-guiding plates 34 and 35 will spin.
  • the combustor 31 includes an annular outer peripheral wall 314 and at least one flange 315 protruding from and disposed outside the outer peripheral wall 314. There are three flanges 315. The three flanges 315 are separately from each other.
  • the inner barrel 32 has a first end 321 connecting to the combustor 31, with the at least one flange 315 attaching and abutting against the first end 321 of the inner barrel 32.
  • the outer barrel 33 has a first end 331 connecting to and enclosing the combustor 31, with the at least one flange 315 attaching and abutting against the first end of the outer barrel 33.
  • the at least one flange 315 includes a first extension protruding radially from the outer peripheral wall 314 of the combustor31 and a second extension protruding from the first extension.
  • the second extension of the at least one flange 315 has a free end and is disposed above the outer peripheral wall 314 of the combustor31.
  • the combustor31 secures to the inner barrel 32 by the at least one flange 315.
  • the at least one flange 315 includes the second extension thereof tightly fitting to the inner barrel 32, with the second extension including an inner edge abutting against an outer peripheral wall of the inner barrel 32.
  • the at least one flange 315 includes the first and second extensions thereof tightly fitting to the outer barrel 33, with the first extension including an edge abutting against an inner peripheral wall of the outer barrel 33, and with the second extension including an outer edge abutting against the inner peripheral wall of the outer barrel 33.
  • the flanges 315 can enhance the structural strength of the combustor31.
  • the inner barrel 32 has a first end 321 and a second end 322 opposite the first end 321.
  • the inner barrel 32 includes the first end 321 thereof connecting to the second end 312 of the combustor31.
  • the outer barrel 33 has a first end 331 and a second end 332 opposite the first end 331.
  • the combustor 31 is disposed within the first end 331 of the outer barrel 33.
  • the inner barrel 32 is radially spaced from the outer barrel 33.
  • the inner and outer barrels 32 and 33 have open ends 321, 322, 331, 332. Ambient air can flow into a space between and cool the temperature of inner and outer barrels 32 and 33. Ambient air can flow into the inner and outer barrels 32 and 33 and cools the combustor31, thereby improving the combustion efficiency.
  • Hot air is discharged from the gas hot air gun head 10 through the second end 321 of the inner barrel 32.
  • the inner barrel 32 includes the second end 322 including a plurality of annular fins 323.
  • the plurality of annular fins 323 help hot air maintain spinning after being discharged from the second end 321 of the inner barrel 32.
  • the plurality of annular fins 323 is disposed radially with respect to a center of the inner barrel 32.
  • the plurality of annular fins 323 is disposed adjacent to each other in a circumferential direction of the inner barrel 32.
  • Each of the plurality of annular fins 323 includes a first lateral edge 324 and a second lateral edge 325 and has a circumferential dimension measuring from the first lateral edge 324 to the second lateral edge 325.
  • the first and second lateral edges 324 and 325 of each of the plurality of annular fins 323 are radially spaced from the center of the inner barrel 32 with first and second radial distances respectively.
  • the second radial distance is shorter than the first radial distance.
  • the outer barrel 33 includes the second end 332 including a stop edge 333 blocking and abutting against the inner barrel 32, with the first lateral edges 324 of the plurality of annular fins abutting against the stop edge.
  • the inner barrel 32 is therefore securely disposed within the outer barrel 33.
  • the plurality of annular fins 323 and the inner barrel 32 are made out of a material.
  • the plurality of annular fins 323 is bended from the second end 322 of inner barrel 32.
  • the flow-guiding device 30 will cause hot air flowing therein to spin such that the flow-guiding device 30 will include a spinning vortex of hot air flowing therein and the gas hot air gun head 10 will discharge the spinning vortex of hot air.
  • the flow-guiding device 30 prevents combustion flames from stretching out of the gas hot air gun, or the combustion flames are prevented from stretching out of the flow-guiding device 30.
  • the temperature of the hot air is increased. Ambient air can flow into the space and cool the temperature of inner and outer barrels 32 and 33. Ambient air can flow into the inner and outer barrels 32 and 33 and cools the combustor31, thereby improving the combustion efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Gas Burners (AREA)
EP14181364.2A 2014-04-22 2014-08-19 Gas hot air gun head Active EP2937631B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW103114496A TW201541025A (zh) 2014-04-22 2014-04-22 瓦斯熱風槍之槍頭

Publications (2)

Publication Number Publication Date
EP2937631A1 EP2937631A1 (en) 2015-10-28
EP2937631B1 true EP2937631B1 (en) 2018-07-11

Family

ID=51389941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14181364.2A Active EP2937631B1 (en) 2014-04-22 2014-08-19 Gas hot air gun head

Country Status (2)

Country Link
EP (1) EP2937631B1 (enrdf_load_stackoverflow)
TW (1) TW201541025A (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087873B (zh) * 2016-11-21 2019-12-31 爱烙达股份有限公司 提升导流效果的热风枪
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
CN108361694B (zh) * 2017-01-26 2020-03-10 爱烙达股份有限公司 具有空气放大器的燃烧装置
TWI625492B (zh) 2017-01-26 2018-06-01 Combustion device with air amplifier
CN110440438A (zh) * 2018-05-03 2019-11-12 创科（澳门离岸商业服务）有限公司 空气加热器
CN110966593B (zh) * 2018-09-29 2021-07-09 爱烙达股份有限公司 瓦斯燃烧装置
CN109249106B (zh) * 2018-11-13 2024-07-02 锐奇控股股份有限公司 热风枪多功能工作头及其热风枪
TWI757672B (zh) * 2019-12-24 2022-03-11 愛烙達股份有限公司 壓力顯示閥及裝設有該壓力顯示閥的瓦斯工具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61250413A (ja) * 1985-04-27 1986-11-07 Nakajima Doukoushiyo:Kk 熱風発生装置
US5155925A (en) * 1991-11-21 1992-10-20 Wonchoel Choi Portable LPG-powered hair dryer
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
TWI261100B (en) 2004-06-25 2006-09-01 Pro Iroda Ind Inc Improved nozzle of hot air tool for gas burning device
US9182144B2 (en) * 2012-03-02 2015-11-10 Pro-Iroda Industries, Inc. Hot air blower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2937631A1 (en) 2015-10-28
TW201541025A (zh) 2015-11-01
TWI506233B (enrdf_load_stackoverflow) 2015-11-01

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