EP3373699A1 - Procédé de fabrication d'un appareil de chauffage et appareil de chauffage - Google Patents

Procédé de fabrication d'un appareil de chauffage et appareil de chauffage Download PDF

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Publication number
EP3373699A1
EP3373699A1 EP17160199.0A EP17160199A EP3373699A1 EP 3373699 A1 EP3373699 A1 EP 3373699A1 EP 17160199 A EP17160199 A EP 17160199A EP 3373699 A1 EP3373699 A1 EP 3373699A1
Authority
EP
European Patent Office
Prior art keywords
coil
support structure
support
heater
wound
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Withdrawn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
EP17160199.0A
Other languages
German (de)
English (en)
Inventor
Timotheus Johannes Maria Van Aken
Gertrude Riëtte VAN DER KAMP
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Priority to EP17160199.0A priority Critical patent/EP3373699A1/fr
Priority to CN201820324847.9U priority patent/CN208609218U/zh
Publication of EP3373699A1 publication Critical patent/EP3373699A1/fr
Withdrawn legal-status Critical Current

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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
    • H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
    • 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
    • A45D20/08—Hot-air producers heated electrically
    • A45D20/10—Hand-held drying devices, e.g. air douches
    • A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
    • 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
    • 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • 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
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • 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
    • H05B2203/022—Heaters specially adapted for heating gaseous material

Definitions

  • the invention relates to a method of manufacturing a heater, and to a heater.
  • Hairdryers are made by placing a heater and fan serial into an open duct.
  • a typical heater is made from a heating wire, like the common OCR25A15, which is coiled and wrapped around a mica frame to fit the limited dimensions of the duct.
  • One aspect of the invention provides a heater which comprises a first coil wound on a first support structure to obtain a first mounted coil having a first outer dimension, a second support structure overlapping the first support structure, and a second coil wound on the second support structure to obtain a second mounted coil having a second outer dimension exceeding the first outer diameter, the second mounted coil overlapping the first mounted coil.
  • the first support structure may be obtained by combining e.g. three first support plates at mutual angles of e.g. 60° to obtain e.g. six first support positions around which the first coil can be wound.
  • the second support structure may be obtained by mounting e.g. six second support plates alongside corresponding halves of the three first support plates to obtain e.g. six second support positions around which the second coil can be wound.
  • support positions where the first coil is suspended on the first support structure are aligned on lines radially extending from the center with respective support positions where the second coil is suspended on the second support structure.
  • the step of mounting the second support structure may include fixating the first mounted coil.
  • Figs. 1-4 and 5-7 illustrate first and second embodiments of the invention.
  • the heater volume is reduced by winding the coil in two diameters with independent pitches so as to wind as compact as possible. In that case one first winds a coil as compact as possible on an inner frame followed by a similar exercise on the outer frame with the next coil.
  • two heating coils C1, C2 with different dimensions are wound on different, but connected, frames or support structures S1, S2.
  • the windings are not positioned in an inner outer sequence, but one coil C1 is placed in the inner diameter position while the other coil C2 is placed in the outer diameter position with an independent pitch from each other.
  • the spacing between the coils C 1, C2 is different, which results in an adapted construction as will be discussed below.
  • the support structure S1, S2 includes a mica frame which is able to fixate a relatively fragile inner coil C1 and a relatively rigid outer coil C2, both with a different pitch (coil to coil distance) to obtain a very compact heater.
  • the mica is shaped in such a way that assembly can be done by hand, without riveting the parts together.
  • an inner mica support structures S1 Around this inner frame S1 the relatively fragile heater coil C1 is wound. After the inner coil C1 has been placed, another support structures S2 is built on top of this inner frame S1, which locks the inner heater coil C1 even more at the bottom side of this outer frame S2, while the relatively rigid coil C2 is wound around the outer support structures S2 at sufficient distance to prevent contact between the two coils C1, C2 from occurring.
  • the first coil C1 has a first diameter
  • the second coil C2 has a second diameter exceeding the first diameter.
  • the first coil C1 is wound for a first number of windings around the first support structure S1
  • the second coil C2 is wound for a second number of windings around the second support structure S2.
  • the second number of windings is about half the first number of windings, but other ratios are alternatively possible.
  • the wire used for the inner coil C1 has a diameter of 0.32 mm and a length of 6.8 m, while the wire used for the outer coil C2 has a diameter of 0.55 mm and a length of 5.9 m.
  • the outer diameter of the heater is 45 or 48 mm, and its height is 53 or 55 mm.
  • the coil diameters are in general 10 - 15 times the wire diameter.
  • the coils used for our design thus have coil diameters of 3.2 mm and 5.5 mm both with a length of about 35 cm.
  • the first coil C1 has a second function (which may even be its main function) as a voltage divider or voltage dropper to turn the mains voltage into a voltage suitable for the fan of the hair dryer.
  • the dissipation resulting from this voltage adaptation is advantageously used to heat the air. If different fan speeds need to be provided, different taps on the inner coil C1 can be used for that purpose.
  • the wire diameter of the first coil C1 can be designed in a way suitable for that second function.
  • Figs. 6 and 7 illustrate how the heater of Fig. 5 is made.
  • Fig. 6 shows the mica plates used for the support structures S1 (lower row) and S2 (upper row).
  • Fig. 7 first shows that the first support structure S1 is made by combining the 3 mica plates shown in the lower row of Fig. 6 . Each of the small grooves on the outer edges forms a support position for the first coil C1. Then, the first coil C1 is wound around the first support structure S1. Next, the mica plates of the second support structure S2 are mounted next to the mica plates of the first support structure S1.
  • Figs. 5-7 is more advantageous than the embodiment of Figs. 1-4 , because while in the drawings, the wound coils C1, C2 are shown to have circular shapes, in reality they will have a polygon shape, i.e. more along straight lines between support positions where the coils C1, C2 are suspended on the respective support structures S1, S2.
  • the support positions of the second support structure S2 are between the support positions of the first support structure S1.
  • the second coil C2 follows a straight line between its support positions, the second coil C2 has a risk of bumping into the first coil C1 where this first coil C1 is suspended at the support positions of the first support structure S1.
  • Figs. 5-7 is more advantageous than the embodiment of Figs. 1-4 , because while in the drawings, the wound coils C1, C2 are shown to have circular shapes, in reality they will have a polygon shape, i.e. more along straight lines between support positions where the coils C1, C2 are suspended on the respective support structures S1, S2.
  • the support positions of the first and second support structures S1, S2 are aligned with each other, so that the distance between the coils C1, C2 is about constant, even if their shapes looks like polygons rather than like circles, so that the risk of the coils C1 and C2 touching one another is less than in the embodiment of Figs. 1-4 .
  • the invention can be used as a heater for a hair dryer, but it can also be suitable for other appliances with small convectional heaters. While the first and second coils C1, C2 overlap, there is no need for these coils C1, C2 to have the same length. If the inner coil C1 is shorter than the outer coil C2, other components can advantageously be mounted inside the second coil C2. While coil C1 is shown to be thinner than coil C2, they may have identical diameters. While coil C1 is shown to have more windings than coil C2, this is not necessary.
  • the coils C1, C2 may have an oval or elliptical shape instead of a round shape, in which case the outer dimension is not the diameter but another characteristic dimension.
  • four mica plates are mounted at mutual equal angles of 45° instead of three plates mounted at mutual equal angles of 60°.
  • the overall shape of the heater may be conical instead of cylindrical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
EP17160199.0A 2017-03-09 2017-03-09 Procédé de fabrication d'un appareil de chauffage et appareil de chauffage Withdrawn EP3373699A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17160199.0A EP3373699A1 (fr) 2017-03-09 2017-03-09 Procédé de fabrication d'un appareil de chauffage et appareil de chauffage
CN201820324847.9U CN208609218U (zh) 2017-03-09 2018-03-09 加热器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17160199.0A EP3373699A1 (fr) 2017-03-09 2017-03-09 Procédé de fabrication d'un appareil de chauffage et appareil de chauffage

Publications (1)

Publication Number Publication Date
EP3373699A1 true EP3373699A1 (fr) 2018-09-12

Family

ID=58428056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17160199.0A Withdrawn EP3373699A1 (fr) 2017-03-09 2017-03-09 Procédé de fabrication d'un appareil de chauffage et appareil de chauffage

Country Status (2)

Country Link
EP (1) EP3373699A1 (fr)
CN (1) CN208609218U (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022269227A1 (fr) * 2021-06-24 2022-12-29 Dyson Technology Limited Appareil de coiffure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20117267U1 (de) * 2001-10-22 2002-02-07 Cheng Chuan Hsin Positionierung der Heizspule von Heißluftgerät
US20150021314A1 (en) * 2013-07-16 2015-01-22 Dyson Technology Limited Heater for a hand held appliance
WO2015052737A1 (fr) * 2013-10-11 2015-04-16 Gamma S.P.A. Procédé de fabrication de résistance électrique coaxiale et résistance électrique coaxiale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20117267U1 (de) * 2001-10-22 2002-02-07 Cheng Chuan Hsin Positionierung der Heizspule von Heißluftgerät
US20150021314A1 (en) * 2013-07-16 2015-01-22 Dyson Technology Limited Heater for a hand held appliance
WO2015052737A1 (fr) * 2013-10-11 2015-04-16 Gamma S.P.A. Procédé de fabrication de résistance électrique coaxiale et résistance électrique coaxiale

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022269227A1 (fr) * 2021-06-24 2022-12-29 Dyson Technology Limited Appareil de coiffure

Also Published As

Publication number Publication date
CN208609218U (zh) 2019-03-15

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