WO2022008408A1 - Sèche-cheveux - Google Patents

Sèche-cheveux Download PDF

Info

Publication number
WO2022008408A1
WO2022008408A1 PCT/EP2021/068451 EP2021068451W WO2022008408A1 WO 2022008408 A1 WO2022008408 A1 WO 2022008408A1 EP 2021068451 W EP2021068451 W EP 2021068451W WO 2022008408 A1 WO2022008408 A1 WO 2022008408A1
Authority
WO
WIPO (PCT)
Prior art keywords
hair
hair dryer
drying chamber
air flow
air
Prior art date
Application number
PCT/EP2021/068451
Other languages
English (en)
Inventor
Mark Johannes Lelieveld
Original Assignee
Koninklijke Philips N.V.
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
Priority claimed from EP20184370.3A external-priority patent/EP3935993A1/fr
Application filed by Koninklijke Philips N.V. filed Critical Koninklijke Philips N.V.
Priority to EP21739142.4A priority Critical patent/EP4178394B1/fr
Priority to US18/014,196 priority patent/US20230255335A1/en
Priority to CN202180048645.0A priority patent/CN115867168A/zh
Priority to PL21739142.4T priority patent/PL4178394T3/pl
Publication of WO2022008408A1 publication Critical patent/WO2022008408A1/fr

Links

Classifications

    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00Hair drying devices; Accessories therefor
    • A45D20/04Hot-air producers
    • A45D20/08Hot-air producers heated electrically
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00Hair drying devices; Accessories therefor
    • A45D20/04Hot-air producers
    • A45D20/08Hot-air producers heated electrically
    • A45D20/10Hand-held drying devices, e.g. air douches
    • AHUMAN NECESSITIES
    • A45HAND OR TRAVELLING ARTICLES
    • A45DHAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D20/00Hair drying devices; Accessories therefor
    • A45D20/04Hot-air producers
    • A45D20/08Hot-air producers heated electrically
    • A45D20/10Hand-held drying devices, e.g. air douches
    • A45D20/12Details thereof or accessories therefor, e.g. nozzles, stands

Definitions

  • US4118874A discloses a hair dryer having inner and outer ducts connected at one end to a centrifugal fan and at the other end to a hood. The fan sucks air through the inner duct and blows it toward said hood through the outer duct. A grille for supporting long hair is positioned in the inner duct so that air drawn toward the fan is drawn through any long hair on said grille.
  • KR20160024677A discloses a hair dryer for long hair, which accommodates and dries long hair insulated from the outside to maximize drying efficiency.
  • the hair dryer comprises: a housing having a handle formed on the outer surface of one side and a hair accommodation space formed with a predetermined depth, wherein hair can be introduced through an opening at the upper part to be accommodated; a blower installed on the lower part of the housing to suck and blow external air into the hair accommodation space; a blowing induction part inducing the air blown by the blower to the inner wall surface of the housing to blow the air to the outer circumference of the hair accommodated in the hair accommodation space; and a heating means installed on a side of the blower, which outlets air, to heat the blown air.
  • US2016150864A1 discloses a hair grooming system includes a vacuum canister, a hose, and a hand-held unit.
  • the hose is secured to and in fluid communication with the vacuum canister and the hand-held unit.
  • the hand-held unit includes a vacuum chamber.
  • a mechanism for creating a vacuum is positioned in the vacuum canister, and the vacuum is communicated to the vacuum chamber by the hose.
  • the system can further include a heating element and a fan arranged to heat air and move the air into the vacuum chamber.
  • a method for grooming hair includes the steps of placing a section of hair into a vacuum chamber; drawing a vacuum to remove excess water from the hair; and applying heated air to the section of hair. It is, inter alia, an object of the invention to provide an improved hair dryer.
  • the invention is defined by the independent claims. Advantageous embodiments are defined in the dependent claims.
  • a cross-section of the drying chamber has a first dimension in a first direction, which first dimension is at least 5 times larger than a second dimension in a second direction perpendicular to the first direction, wherein the first and second directions are perpendicular to a direction of the air flow in the drying chamber.
  • the drying chamber is thus oval or even flat. Compared to a drying chamber having a circular cross-section, the advantage is obtained that hair is spread over the width of the drying chamber so that it is more equally dried.
  • hair in the middle of a hair strand will remain humid while hair at the outside of a hair strand will be dry, and if the settings are adjusted such that hair in the middle is also sufficiently dried, hair at the outside of the hair strand will be exposed to too much heat, which will damage the hair.
  • the first dimension is at least 10 times larger than a second dimension.
  • a compact hair dryer design is obtained if the drying chamber is folded in that the drying chamber has a U-turn in the direction of the air flow.
  • a first area of the cross-section of the drying chamber at the U-turn is smaller than a second area of the cross-section in the middle between the hair inlet and the U-turn, the air speed is locally increased which facilitates hair entering the device.
  • a smaller cross-section it is additionally possible to increase the radius of the turns, which again makes it easier for the hair to make the U-turn without deformations or undesired curls.
  • a more satisfactory hair drying experience is obtained if the hair dryer is arranged for heating hair from multiple sides.
  • the drying speed is also increased if a wall of the drying chamber is provided with a hydrophilic or water absorbing or water surface tension reducing material.
  • the water absorbing material can be regenerated by means of hot air, the material can be used multiple times.
  • the drying chamber can be cleaned.
  • the hair dryer has a sensor for sensing temperature and/or humidity of the air flow at an air outlet of the hair dryer, and a part of the air flow is recirculated based on an output of the sensor, the airflow can be controlled to get best results in terms of speed and hair feel, and it may become possible to do with less heater power.
  • Fig. 1 shows a cross section of an embodiment of a hair dryer according to the invention.
  • Fig. 2 shows another view of a hair dryer according to the invention.
  • an inlet II for hair and cold air is wide, like a letter box sleeve.
  • the wide inlet II of a drying chamber spreads hair evenly, thereby preventing hair in the middle of a tress from being not dried well.
  • a rounded curve at the hair inlet II bends the hair into the device, based on the coanda effect.
  • the size of the hair inlet II ranges from 5 x 50 mm to 20 x 250 mm. In a practical example, the inlet II is 10 x 120 mm.
  • the hair inlet 11 may be straight, in a preferred embodiment, the shape of the hair inlet II follows a contour of a user’s head to allow more hair to enter the drying chamber.
  • the hair inlet II may thus be curved.
  • the hair inlet II may be V- shaped.
  • the drying chamber is formed by a folded hair channel HC in which the hair will go in (downwards), then around the first round edge El U-turn up, and then around the second round edge E2 U-turn down.
  • a 60 cm long hair path as is needed for customers with long hair, can be fit into a compact device that is only about 20 cm high.
  • a cross-sectional area can be less than in the idle between the edges so as to locally increase the air speed to help pull the hair through the U-turn, and to ensure that the U-turns are rounder, which also helps to allow hair to pass the U-turns in the hair channel HC.
  • the drying chamber has only one U-turn.
  • the inner wall of the drying chamber can be equipped with dimples as the airflow is defined and dimples may reduce drag. Dimples also help to improve the heat exchange.
  • a wall of the drying chamber HC is shaped so as to style the hair and/or increase a contact area that is in contact with the hair.
  • the hair channel HC may contain ribs to spread the hairs or even style the hair, and may contain swirl ribs which can be set to create a curl effect. If the walls of the hair channel are hot, such ribs increase a contact area that is in contact with the hair, thereby speeding up the drying process.
  • a filter FT prevents hairs from going into a fan F.
  • the filter FT is preferably removable so as to allow for cleaning.
  • the suction fan F can be set on flow, strong and weak.
  • the fan F should be able to handle a minimal amount of water/moisture.
  • the fan F may produce an air flow of between 5 and 401/s, preferably between about 18 to 201/s; fans as used in some vacuum cleaners may be suitable for this purpose.
  • a single motor/fan unit is used to create suction that will not only pull hair into the hair channel HC but also pull air through or along a heater HT into the hair channel HC.
  • heated air is only provided from one side (i.e. from the right side in the drawings) to the hair that has entered the hair dryer. In another embodiment, heated air is provided from both left and right sides to the hair.
  • the heater HT is shown to the right of the folded hair channel HC. In other embodiments, the heater HT is placed elsewhere, e.g. at the bottom, or before or after the folded hair channel as shown in Fig. 1 from the viewpoint of a person looking at Fig. 1.
  • a suction fan F at the end of the hair channel HC that sucks hair into the hair channel it is possible to have a fan in the separate channel in which a heater HT is placed so as to create an air flow in the hair channel HC that guides hair into the hair channel.
  • the hair channel HC may have multiple hot air inlets along its trajectory so as to ensure that the heat is more evenly distributed over the hair length so as to ensure a more even drying rate.
  • the outlet air for humid air. If the hair dryer is provided with a heater HT, the outlet air is warm and could be used to dry the scalp. To that end, the outlet air should be directed towards the scalp.
  • the filter FT Just before the filter FT, or between the filter FT and the fan F, there can be a sensor MS to measure the moisture and/or temperature, linked to the dryness of the hair.
  • some outlet air from the fan F may be rechanneled by a valve V2 towards the heater HT to ensure an air flow along the heater HT. This recirculation may save energy (as the heat in the outlet air is not wasted but reused), which is particularly important for a battery-operated hair dryer. Yet, the air flow should allow for a sufficient cooling of the heater HT.
  • the recirculated air may have too much moisture to ensure that hair is dried in a satisfactory way, so that if the sensor MS indicates that the air contains too much moisture, the air is not recirculated or only to a limited extent by suitably controlling the valve V2.
  • the hair dryer may indicate that the hair has been sufficiently dried, e.g. by beep signals.
  • the heater HT is of a type that provides hot air to the hair
  • an outlet of an air channel in which the heater HT is located is placed at the beginning of the hair channel HC, near the hair inlet II.
  • the air flow is balanced in such a way that enough air goes through the heater to cool it and provide hot air to the hair. For example, about 50% of the air flow in the hair channel comes through the hair inlet, and about 50% of the air flow in the hair channel comes from the channel (or channels) in which the heater HT is positioned. Once the hair is closing the hair inlet II, the hot air ratio will increase.
  • a mechanism may be provided to make the inlet 11 narrower once hair has entered the hair dryer, so that less cold air can enter the hair dryer through the inlet II.
  • the air channel in which the heater HT is located may have its own inlet 12 for cold air in case there is no recirculation or insufficient recirculation to ensure a sufficiently large airflow to cool the heater HT and to provide a sufficient amount of hot air to the hair.
  • the heater HT can be controlled with a temperature switch.
  • the temperature in the hair channel HC is preferably around 70 ⁇ 100 °C.
  • the heater HT may be a conventional (coil/ceramic) heater.
  • the heater HT may have a power between 1000 W and 2500 W, such as a 1600 W or 2100 W heater as used in conventional hair dryers.
  • the heater HT is element-based, it can be placed along the hair channel walls (e.g. a PTC heater/ thin film heater). Again the surface can be provided with dimples to improve heat exchange.
  • the heater capacity can be less as all the heat flows along the hairs. A lower heater wattage allows for a cordless, i.e. battery-operated device, as efficiency is better.
  • the entire hair channel HC can be made transparent/mirrored to allow all the light passing through and multiple times hit the hair.
  • heat generated by the LED units is preferably reused to heat the hair, e.g. by means of an airflow that has passed the LED units or cooling bodies thereof.
  • a valve VI at the outlet of the hot air channel can be closed so as to ensure that the suction through the inlet I is increased.
  • IR sensor inside to measure the temp of the hair.
  • Other sensors can be added, such as a camera allowing for settings of the fan F and/or heater HT and/or any ionizer to be adjusted based on an analysis (possibly involving artificial intelligence) of images taken by the camera.

Abstract

L'invention concerne un sèche-cheveux comprenant un ventilateur (F) servant à générer un flux d'air, et une chambre de séchage (HC) ayant une entrée pour cheveux (II) dans laquelle les cheveux peuvent être guidés par le flux d'air. Une section transversale de la chambre de séchage (HC) présente une première dimension dans une première direction, la première dimension étant au moins 5 fois plus grande qu'une deuxième dimension dans une deuxième direction perpendiculaire à la première direction, les première et deuxième directions étant perpendiculaires à une direction du flux d'air. La chambre de séchage (HC) peut être pliée de telle sorte que la chambre de séchage présente un demi-tour dans la direction du flux d'air. Une première zone de la section transversale de la chambre de séchage (HC) au niveau du demi-tour peut être plus petite qu'une deuxième zone de la section transversale au milieu entre l'entrée pour cheveux (II) et le demi-tour. Une entrée pour cheveux (II) de la chambre de séchage (HC) peut être façonnée pour suivre un contour de la tête d'un utilisateur. Le sèche-cheveux peut être agencé pour chauffer les cheveux depuis de multiples côtés. Une paroi de la chambre de séchage (HC) peut être pourvue d'un matériau hydrophile ou absorbant l'eau ou de réduction de la tension superficielle de l'eau. Le matériau absorbant l'eau peut être régénéré par l'air chaud. La chambre de séchage (HC) est en mesure d'être ouverte, ce par quoi la chambre de séchage peut être nettoyée. Le sèche-cheveux peut avoir un capteur (MS) servant à détecter la température et/ou l'humidité du flux d'air au niveau d'une sortie d'air du sèche-cheveux, et une partie du flux d'air peut être recirculée sur la base d'une sortie du capteur (MS). Le sèche-cheveux peut avoir une buse pour canaliser l'air chaud vers le cuir chevelu d'un utilisateur. Une paroi de la chambre de séchage (HC) peut être façonnée de façon à coiffer les cheveux et/ou augmenter une zone de contact qui est en contact avec les cheveux.
PCT/EP2021/068451 2020-07-07 2021-07-05 Sèche-cheveux WO2022008408A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21739142.4A EP4178394B1 (fr) 2020-07-07 2021-07-05 Sèche-cheveux
US18/014,196 US20230255335A1 (en) 2020-07-07 2021-07-05 Hair dryer
CN202180048645.0A CN115867168A (zh) 2020-07-07 2021-07-05 吹风机
PL21739142.4T PL4178394T3 (pl) 2020-07-07 2021-07-05 Suszarka do włosów

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP20184370.3A EP3935993A1 (fr) 2020-07-07 2020-07-07 Sèche-cheveux
EP20184370.3 2020-07-07
EP20201456 2020-10-13
EP20201456.9 2020-10-13

Publications (1)

Publication Number Publication Date
WO2022008408A1 true WO2022008408A1 (fr) 2022-01-13

Family

ID=76807672

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/068451 WO2022008408A1 (fr) 2020-07-07 2021-07-05 Sèche-cheveux

Country Status (5)

Country Link
US (1) US20230255335A1 (fr)
EP (1) EP4178394B1 (fr)
CN (1) CN115867168A (fr)
PL (1) PL4178394T3 (fr)
WO (1) WO2022008408A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230413973A1 (en) * 2016-07-29 2023-12-28 Spur Concepts Inc. System and method for an enhanced hair dryer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3598919A1 (fr) * 2018-07-25 2020-01-29 Koninklijke Philips N.V. Partie supplémentaire de sèche-cheveux

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307489A2 (fr) * 1975-04-17 1976-11-12 Oreal Sechoir pour cheveux perfectionne, en particulier pour cheveux longs
US20120317829A1 (en) * 2011-06-14 2012-12-20 Yong Tok Kim Hair dryer system
KR20160024677A (ko) 2014-08-26 2016-03-07 강철원 긴머리용 헤어드라이기
US20160150864A1 (en) 2014-12-02 2016-06-02 RevAir, LLC Vacuum assisted systems and methods for grooming hair
WO2019027211A1 (fr) * 2017-08-03 2019-02-07 김창기 Sèche-cheveux
WO2019048357A1 (fr) 2017-09-10 2019-03-14 Koninklijke Philips N.V. Dispositif de coiffage
CN209547321U (zh) * 2019-01-15 2019-10-29 莱克电气股份有限公司 具备卷发功能的电吹风机
KR102067545B1 (ko) * 2018-07-30 2020-01-17 상명대학교 천안산학협력단 베개형 모발 건조기

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307489A2 (fr) * 1975-04-17 1976-11-12 Oreal Sechoir pour cheveux perfectionne, en particulier pour cheveux longs
US4118874A (en) 1975-04-17 1978-10-10 L'oreal Hair dryer, especially for long hair
US20120317829A1 (en) * 2011-06-14 2012-12-20 Yong Tok Kim Hair dryer system
KR20160024677A (ko) 2014-08-26 2016-03-07 강철원 긴머리용 헤어드라이기
US20160150864A1 (en) 2014-12-02 2016-06-02 RevAir, LLC Vacuum assisted systems and methods for grooming hair
WO2019027211A1 (fr) * 2017-08-03 2019-02-07 김창기 Sèche-cheveux
WO2019048357A1 (fr) 2017-09-10 2019-03-14 Koninklijke Philips N.V. Dispositif de coiffage
KR102067545B1 (ko) * 2018-07-30 2020-01-17 상명대학교 천안산학협력단 베개형 모발 건조기
CN209547321U (zh) * 2019-01-15 2019-10-29 莱克电气股份有限公司 具备卷发功能的电吹风机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230413973A1 (en) * 2016-07-29 2023-12-28 Spur Concepts Inc. System and method for an enhanced hair dryer

Also Published As

Publication number Publication date
US20230255335A1 (en) 2023-08-17
PL4178394T3 (pl) 2024-04-29
EP4178394A1 (fr) 2023-05-17
EP4178394B1 (fr) 2024-01-10
CN115867168A (zh) 2023-03-28

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