WO2018099622A1 - Pistolet à air chaud - Google Patents

Pistolet à air chaud Download PDF

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Publication number
WO2018099622A1
WO2018099622A1 PCT/EP2017/073166 EP2017073166W WO2018099622A1 WO 2018099622 A1 WO2018099622 A1 WO 2018099622A1 EP 2017073166 W EP2017073166 W EP 2017073166W WO 2018099622 A1 WO2018099622 A1 WO 2018099622A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
hot air
air
gun according
measuring tube
Prior art date
Application number
PCT/EP2017/073166
Other languages
German (de)
English (en)
Inventor
Mats Holgersson
Arne Edvardsson
Original Assignee
Isaberg Rapid Ab
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 Isaberg Rapid Ab filed Critical Isaberg Rapid Ab
Priority to CN201780070507.6A priority Critical patent/CN109952475A/zh
Priority to EP17768438.8A priority patent/EP3548811A1/fr
Publication of WO2018099622A1 publication Critical patent/WO2018099622A1/fr

Links

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/025—Interfacing a pyrometer to an external device or network; User interface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/0265—Handheld, portable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0808—Convex mirrors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0818—Waveguides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0893—Arrangements to attach devices to a pyrometer, i.e. attaching an optical interface; Spatial relative arrangement of optical elements, e.g. folded beam path

Definitions

  • the invention relates to a hot air gun according to the preamble of claim 1.
  • Hot air guns are used for targeted heating of a workpiece, for example, to deform this or to weld with another workpiece to apply a film on the workpiece or remove it or to dry the workpiece or accelerate chemical processes.
  • the hot air gun has a housing in which a hot air device is arranged, which sucks in ambient air via an air inlet in the housing, these heated and passed through an air duct via an air outlet to the workpiece.
  • Typical hot air temperatures are in the range of some 100 ° C.
  • the actual temperature achieved at the surface of the workpiece is not only dependent on the temperature of the hot air and the air flow, but also to a great extent on the distance between the air outlet and the surface of the workpiece.
  • a user of the hot air gun must therefore develop in practice a good sense of how hot and how strong he adjusts the hot air flow and at what distance from the workpiece he holds the hot air gun, on the one hand to achieve the desired effect and on the other hand, the workpiece with not one high temperature to apply and thereby damage.
  • the radiated from the workpiece infrared radiation is a good measure of its temperature.
  • the invention is based on the idea with the arrangement of a measuring tube in the air duct, at the rear end of the temperature sensor is arranged to judge the latter with high accuracy on the impingement of the hot air jet.
  • the measuring tube is advantageously aligned parallel to a longitudinal direction of the air channel.
  • the measuring tube is arranged at a distance from an inner surface of the housing delimiting the air duct and ideally in the middle in the air duct.
  • an inner circumferential surface of the measuring tube is a reflecting surface, for example a polished metal surface. Reflecting metal surfaces emit only little heat radiation, so that the temperature of the measuring tube has little influence on the measurement result.
  • a reflecting surface for example a polished metal surface. Reflecting metal surfaces emit only little heat radiation, so that the temperature of the measuring tube has little influence on the measurement result.
  • September 14, 2017 tallober Structure is in particular chromium or a chromium-containing metal or a chromium alloy into consideration.
  • the hot air device comprises a heating unit for heating the air and an air flow unit for generating the air flow, wherein the air flow unit is usually designed as a fan.
  • the heating unit is arranged closer to the air outlet than the temperature sensor, so that only unheated ambient air is conducted past it. This avoids unnecessary heating of the temperature sensor.
  • the temperature measuring device has an evaluation unit for determining the deviation of the temperature measured by the temperature sensor from a predefined setpoint temperature, and display means are provided for visually displaying the determined deviation. The user is then directly displayed whether the actual temperature reached corresponds to the desired preset target temperature or whether the heat output and / or the distance of the air outlet from the workpiece must be changed.
  • a selection element for selecting a temperature measured by the temperature sensor can be provided as the predetermined setpoint temperature.
  • the user can then apply the heat gun until he sees that the desired effect, such as peeling off a film, occurs. He then actuates the selection element, so that the temperature measured in this moment by the temperature sensor is selected as the predetermined set temperature.
  • the display means then help the user to keep this temperature approximately constant.
  • An automatic temperature control by means of a control device is possible. Parameters such as air flow and heat output for controlling the temperature are set automatically.
  • the predetermined setpoint temperature can be entered by means of an input unit, for example as a value in ° C.
  • Fig. 1 is a hot air gun in perspective view
  • the hot air gun 10 shown in the drawing has a housing 12 with a handle 14.
  • the housing 12 also has in its rear region an air inlet 16, which is partially on the visible in Fig. 1 right side, partially symmetrical thereto on the left side, and an air outlet 18 at its front end.
  • an air duct 20 in which a hot air device 22 is arranged, which serves to suck in ambient air through the air inlet 16, to heat them and then the hot air through the air outlet 18 to a workpiece to be heated to blow.
  • the heating air device 22 accordingly has a fan 24 and a heating unit 26.
  • the fan 24 serves to generate the air flow in the air duct 20, while the heating unit 26 serves to heat the air flowing past it.
  • a measuring tube 28 is arranged, whose front end 30 is open to the air outlet 18 and is arranged at a distance from the air outlet 18, so that it is located in the air duct 20.
  • an infrared temperature sensor or pyrometer 34 is disposed at the rear end, which is part of a arranged on a printed circuit board 32 temperature measuring device 36.
  • the inner circumferential surface 38 of the measuring tube 28 consists of a polished layer of chromium or chromium-containing metal and is thus mirrored.
  • the measuring tube 28 is arranged centrally in the air channel 20, so that its central longitudinal axis coincides with the central longitudinal axis of the air channel 20.
  • the temperature sensor 34 arranged centrally at the rear end 32 of the measuring tube 28 can only or predominantly receive radiation from a surface to be heated by the hot air, as illustrated by the detection region 42 shown by way of example in the drawing.
  • the temperature measuring device 36 also has an evaluation unit which determines the difference between the temperature measured by the temperature sensor 34 and a predetermined desired temperature.
  • the setpoint temperature is predetermined by the user, for example, when he sees when he sees that the desired effect is set on the workpiece, presses a selection element in the form of a pushbutton 44.
  • a push button 44 is disposed on each side of the housing 12.
  • the hot air gun 10 has display means for displaying the measured temperature.
  • a lighting unit 46 arranged on the printed circuit board 32, which illustrates for the user the deviation between the temperature measured by the temperature sensor 34 and the setpoint temperature: If the measured temperature lies within a tolerance range around the predetermined temperature, the lighting unit 46 directs a green light beam on the workpiece while emitting a red light beam when the measured temperature is too high or a blue light beam when the measured temperature is too low. Furthermore, the display means on a display 48, which displays the temperature, for example in ° C. In addition, an automatic control of the temperature by means of a control device to which the measured temperature is transmitted. This measures the temperature in the air flow and regulates the heat supply and the speed of the air flow as a function of the air temperature, the temperature measured on the workpiece and the setpoint temperature. In addition, the temperature of the measuring tube 28 can be measured, and the proportion of the infrared radiation emitted by the measuring tube 28 can be subtracted from the radiation detected by the temperature sensor 34.
  • the invention relates to a hot air gun 10 having a housing 12 opening into an air outlet 18 air duct 20 housing 12 with a arranged in the housing 12 hot air device 22 for generating a hot air flow and for supplying the hot air flow through the air duct 20 via the air outlet 18th to a workpiece and to a temperature measuring device 36 having a temperature sensor 34 for non-contact measurement of a surface temperature of the workpiece.
  • September 14, 2017 measure is provided that in the air duct 20, a measuring tube 28 is arranged, the front end 30 is open and the air outlet 18 faces and in which at its rear end 32 of the temperature sensor 34 is arranged.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating Apparatus (AREA)
  • Radiation Pyrometers (AREA)

Abstract

La présente invention concerne un pistolet à air chaud (10) doté d'un boîtier (12) qui présente un canal à air (20) débouchant dans une sortie d'air (18), d'un dispositif à air chaud (22) qui se trouve dans le boîtier (12) et sert à produire un courant d'air chaud et à faire passer le courant d'air chaud par le canal à air (20), via la sortie d'air (18) jusqu'à une pièce ; et d'un dispositif de mesure de température (36) comprenant un capteur de température (34) destiné à effectuer la mesure sans contact de la température de surface de la pièce. Selon l'invention, dans le canal à air (20) se trouve un tube de mesure (28) dont l'extrémité avant (30) est ouverte et orientée vers la sortie d'air (18) et dans lequel le capteur de température (34) est disposé à son extrémité arrière (32).
PCT/EP2017/073166 2016-12-02 2017-09-14 Pistolet à air chaud WO2018099622A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780070507.6A CN109952475A (zh) 2016-12-02 2017-09-14 热空气枪
EP17768438.8A EP3548811A1 (fr) 2016-12-02 2017-09-14 Pistolet à air chaud

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016014334.7 2016-12-02
DE102016014334.7A DE102016014334A1 (de) 2016-12-02 2016-12-02 Heißluftpistole

Publications (1)

Publication Number Publication Date
WO2018099622A1 true WO2018099622A1 (fr) 2018-06-07

Family

ID=59895308

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/073166 WO2018099622A1 (fr) 2016-12-02 2017-09-14 Pistolet à air chaud

Country Status (4)

Country Link
EP (1) EP3548811A1 (fr)
CN (1) CN109952475A (fr)
DE (1) DE102016014334A1 (fr)
WO (1) WO2018099622A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655206A (zh) * 2017-08-21 2018-02-02 浙江普莱得电器有限公司 一种可检测温度的热风枪

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2614275A (en) * 2021-12-23 2023-07-05 Dyson Technology Ltd Haircare appliance

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672871A1 (fr) * 1994-03-16 1995-09-20 Laboratoires D'electronique Philips S.A.S. Appareil de chauffage à circulation d'air muni d'une commande infra-rouge
US20080144696A1 (en) * 2006-12-13 2008-06-19 Diversified Dynamics Corporation Heat gun with infrared surface thermometer
EP1956317A2 (fr) * 2007-01-30 2008-08-13 Master Appliance Corporation Dispositif et procédé de chauffage
DE202012102739U1 (de) 2012-06-15 2013-09-17 Steinel Gmbh Messeinrichtung, deren Verwendung sowie Heißluftgebläse mit Messeinrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3805039B2 (ja) * 1996-11-14 2006-08-02 シチズン時計株式会社 放射体温計
CN103406630A (zh) * 2013-07-15 2013-11-27 吴江市同心电子科技有限公司 一种电烙铁
US20150125798A1 (en) * 2013-11-06 2015-05-07 Michael S. Swanick Adapter to Use Heat Gun to Start Pellet Burner
CN104534649A (zh) * 2014-12-31 2015-04-22 西安泰力松新材料股份有限公司 一种热风枪及热风枪系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672871A1 (fr) * 1994-03-16 1995-09-20 Laboratoires D'electronique Philips S.A.S. Appareil de chauffage à circulation d'air muni d'une commande infra-rouge
US20080144696A1 (en) * 2006-12-13 2008-06-19 Diversified Dynamics Corporation Heat gun with infrared surface thermometer
EP1956317A2 (fr) * 2007-01-30 2008-08-13 Master Appliance Corporation Dispositif et procédé de chauffage
DE202012102739U1 (de) 2012-06-15 2013-09-17 Steinel Gmbh Messeinrichtung, deren Verwendung sowie Heißluftgebläse mit Messeinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655206A (zh) * 2017-08-21 2018-02-02 浙江普莱得电器有限公司 一种可检测温度的热风枪

Also Published As

Publication number Publication date
EP3548811A1 (fr) 2019-10-09
CN109952475A (zh) 2019-06-28
DE102016014334A1 (de) 2018-06-07

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