EP3261410B1 - Infrared heater - Google Patents

Infrared heater Download PDF

Info

Publication number
EP3261410B1
EP3261410B1 EP17161007.4A EP17161007A EP3261410B1 EP 3261410 B1 EP3261410 B1 EP 3261410B1 EP 17161007 A EP17161007 A EP 17161007A EP 3261410 B1 EP3261410 B1 EP 3261410B1
Authority
EP
European Patent Office
Prior art keywords
light emitting
reflecting film
emitting tube
tubes
arrangement direction
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
EP17161007.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3261410A1 (en
Inventor
Yumi MINEYAMA
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.)
Toshiba Lighting and Technology Corp
Original Assignee
Toshiba Lighting and Technology Corp
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 Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Publication of EP3261410A1 publication Critical patent/EP3261410A1/en
Application granted granted Critical
Publication of EP3261410B1 publication Critical patent/EP3261410B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/032—Heaters specially adapted for heating by radiation heating

Definitions

  • the thin film containing alumina or silica as a main component described above, cannot obtain a reflectivity close to 100% and some of infrared light emitted from the light emitting tube passes through the reflecting film. Therefore, in the irradiation direction of the infrared heater, irradiation efficiency of infrared light is lowered and it is preferable that the reflectivity of the reflecting film is increased.
  • An infrared heater 1 includes a plurality of light emitting tubes 5 emitting infrared light, a base member 6 as a connection member, and a reflecting film 7.
  • the infrared heater 1 is configured of a so-called halogen heater.
  • the infrared heater 1 having two light emitting tubes 5 is described, but the number of the light emitting tubes 5 is not limited.
  • the infrared heater 1 as illustrated in FIGS.
  • the reflecting film 7 is provided on an outer peripheral surface as a peripheral surface of the light emitting tube 5, and the reflecting film 7 reflects infrared light, emitted by the light emitting tube 5, in a predetermined irradiation direction. Moreover, the reflecting film 7 may be provided on an inner peripheral surface of the light emitting tube 5.
  • the reflecting film 7 is formed of a material containing gold as a main component and a reflectivity thereof is higher than that of a reflecting film formed of a material containing alumina, silica, or the like as a main component.
  • the reflecting film 7 is provided over a predetermined covering range in the circumferential direction of the light emitting tube 5 and, as illustrated in FIG. 1 , is provided over the light emitting region A in the length direction (Y direction) of the light emitting tube 5.
  • the predetermined covering range as illustrated in FIG. 3 , the reflecting film 7 is provided over a covering range of 1/4 or more and 3/4 or less of an entire circumference of the light emitting tube 5 in the circumferential direction.
  • the reflecting film 7 is provided over a covering range in which a center angle around a center axis O of the light emitting tube 5 is 90° or more and 270° or less.
  • the reflecting film 7 illustrated in FIG. 3 is provided over a covering range of 1/2(180°) in the circumferential direction of the light emitting tube 5.
  • each reflecting film 7 in the circumferential direction of each light emitting tube 5 is provided on a side opposite to a side facing the object to be irradiated.
  • the reflecting film 7 is disposed symmetrically with respect to a center line C1 of the light emitting tube 5 orthogonal to the arrangement direction (X direction) of the plurality of light emitting tubes 5 in a cross section (X-Z plane) orthogonal to the length direction (Y direction) of the light emitting tube 5. Therefore, each reflecting film 7 of each light emitting tube 5 is also provided symmetrically with respect to a center line C2 in the arrangement direction of the plurality of light emitting tubes 5 in the cross section (X-Z plane).
  • the reflecting film 7 may be disposed to be offset toward one side with respect to the center line C1 of the light emitting tube 5.
  • the film thickness of the reflecting film 7 in the embodiment is set according to the invention to 45 [nm] or more and 300 [nm] or less.
  • the film thickness of the reflecting film 7 is, for example, within a range of approximately 90 [nm] or more and approximately 230 [nm] or less if improvement of the irradiation intensity, suppression of peeling of the reflecting film 7, and suppression of an increase in the cost of the raw material are appropriately ensured.
  • an inclined angle ⁇ 2 in which a plane connecting the both ends of the reflecting film 7 is inclined around the center axis O of the light emitting tube 5 is referred to as an inclined angle ⁇ 2 of an opening surface of the reflecting film 7, and each modification example, in which the inclined angle ⁇ 2 is changed to 0°, 15°, 30°, and 45°, is illustrated horizontally in line.
  • each reflecting film 7 of two light emitting tubes 5 is inclined symmetrically with respect to the center line C2 in the arrangement direction of the two light emitting tubes 5.
  • the center angle ⁇ 1 formed by the opening portion of the reflecting film 7 is 160° and 140°, in the cross section (X-Z plane) of the light emitting tube 5 orthogonal to the center axis O (length direction) of the light emitting tube 5, the inclined angle ⁇ 2, in which a line segment connecting one end of the reflecting film 7 and the center axis O of the light emitting tube 5 in the circumferential direction of the light emitting tube 5 is inclined around the center axis O, corresponds to the inclined angle ⁇ 2 of the opening surface of the reflecting film 7.
  • Example 5 Similar to a case where the center angle ⁇ 1 is 180°, as illustrated in FIG. 7 , also if the center angle ⁇ 1 formed by the opening portion of the reflecting film 7 is 160°, as the inclined angle ⁇ 2 increased, the irradiation intensity ratio of the center line C2 in the arrangement direction of the two light emitting tubes 5 was gradually increased and the irradiation intensity ratio at a position separated from the center line C2 in the arrangement direction decreased. In addition, in Example 5 (160°, 0°), the irradiation intensity ratio in the arrangement direction was increased more than that of a case of Example 1 (180°, 0°).
  • Example 9 the irradiation intensity ratio in the arrangement direction was increased more than that of a case of Example 1 (180°, 0°).
  • FIG. 9 is a sectional view illustrating an infrared heater according to another embodiment.
  • FIG. 10 is a sectional view illustrating an infrared heater according to a modification example of the other embodiment.
  • the other embodiments are different from the embodiment described above in that three light emitting tubes 5 are arranged.
  • the reflecting film 7 is disposed symmetrically with respect to the center line C1 of the light emitting tube 5, orthogonal to the arrangement direction in the cross section (X-Z plane) orthogonal to the length direction of the light emitting tube 5.
  • the light emitting tube 5, positioned at the center in the arrangement direction of the six light emitting tubes 5, includes two light emitting tubes 5.
  • a configuration in which the disposition of the reflecting films 7 in the circumferential direction of the light emitting tube 5, or the covering range of the reflecting film 7 in the circumferential direction of the light emitting tube 5 is gradually changed from the light emitting tube 5 of the center in the arrangement direction of the plurality of light emitting tubes 5 toward each light emitting tube 5 at the both ends in the arrangement direction, may be provided.
  • the disposition or the covering range of the reflecting films 7 is changed. Therefore, the distribution of the irradiation intensity ratio in the arrangement direction can be easily adjusted and desired light distribution characteristics can be obtained.

Landscapes

  • Resistance Heating (AREA)
EP17161007.4A 2016-06-24 2017-03-15 Infrared heater Active EP3261410B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016125580A JP6834188B2 (ja) 2016-06-24 2016-06-24 赤外線ヒータ

Publications (2)

Publication Number Publication Date
EP3261410A1 EP3261410A1 (en) 2017-12-27
EP3261410B1 true EP3261410B1 (en) 2019-05-01

Family

ID=58387638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17161007.4A Active EP3261410B1 (en) 2016-06-24 2017-03-15 Infrared heater

Country Status (4)

Country Link
EP (1) EP3261410B1 (ja)
JP (1) JP6834188B2 (ja)
CN (1) CN107548171A (ja)
ES (1) ES2731361T3 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7124593B2 (ja) * 2018-09-21 2022-08-24 東芝ライテック株式会社 ヒータ
JP2022023361A (ja) * 2020-07-27 2022-02-08 トヨタ自動車株式会社 赤外線溶着機
AT525956A1 (de) * 2022-02-21 2023-09-15 Easytherm Gmbh Strahlungsheizelement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5382805A (en) * 1993-11-01 1995-01-17 Fannon; Mark G. Double wall infrared emitter
JP3225852B2 (ja) * 1996-09-26 2001-11-05 ウシオ電機株式会社 ランプ装置
US5951896A (en) * 1996-12-04 1999-09-14 Micro C Technologies, Inc. Rapid thermal processing heater technology and method of use
FR2847759A1 (fr) * 2002-11-27 2004-05-28 Koninkl Philips Electronics Nv Systeme de chauffage
WO2006120173A1 (en) * 2005-05-11 2006-11-16 Nv Bekaert Sa A reflector for an infrared radiating element
WO2007147100A2 (en) * 2006-06-16 2007-12-21 Tempco Electric Heater Corporation Radiant heater
JP2010048441A (ja) * 2008-08-20 2010-03-04 Panasonic Corp 加熱調理器
JP2010112586A (ja) * 2008-11-04 2010-05-20 Mitsubishi Electric Corp 加熱調理器
CN102625499B (zh) * 2011-01-31 2015-11-04 乐金电子(天津)电器有限公司 具有反射功能的烧烤管及微波炉

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3261410A1 (en) 2017-12-27
JP6834188B2 (ja) 2021-02-24
JP2017228493A (ja) 2017-12-28
ES2731361T3 (es) 2019-11-15
CN107548171A (zh) 2018-01-05

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