EP1371302A1 - Appareil pour la production d'un écoulement de l'air chaud - Google Patents

Appareil pour la production d'un écoulement de l'air chaud Download PDF

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Publication number
EP1371302A1
EP1371302A1 EP03012708A EP03012708A EP1371302A1 EP 1371302 A1 EP1371302 A1 EP 1371302A1 EP 03012708 A EP03012708 A EP 03012708A EP 03012708 A EP03012708 A EP 03012708A EP 1371302 A1 EP1371302 A1 EP 1371302A1
Authority
EP
European Patent Office
Prior art keywords
air duct
air flow
cold air
mixing chamber
flow
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.)
Granted
Application number
EP03012708A
Other languages
German (de)
English (en)
Other versions
EP1371302B1 (fr
Inventor
Bernd Dr. Fränzel
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1371302A1 publication Critical patent/EP1371302A1/fr
Application granted granted Critical
Publication of EP1371302B1 publication Critical patent/EP1371302B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/48—Drying by means of hot air

Definitions

  • the invention relates to a device for generating a temperature-controlled air flow.
  • U.S. 4,316,077 Another possibility of continuously adjusting the temperature of an air flow is off U.S. 4,316,077.
  • a hair dryer disclosed, one in the to be heated Has air flow pivotally arranged heating device. The heating of the Airflow through the heater depends on the angle that the heater with the direction of flow of the airflow so that the temperature of the airflow can be varied by swiveling the heating device.
  • DE 15 32 897 A discloses a hair dryer which has a tool holder for inserting a tool. An airflow emerges from the tool carrier, which is composed of a central airflow of high temperature and an airflow surrounding the central airflow of low temperature.
  • DE 81 05 442 U1 discloses a hair dryer with an air outlet duct for warm air and an additional cold air nozzle. Air is supplied to the cold air nozzle from the area upstream of the heating element, the air supply line being able to be interrupted with the aid of a closing means.
  • DE 44 46 188 C1 discloses a hot air gun with a main air duct, in which a heating element for generating a hot air flow is arranged, and a secondary air duct for producing a cold air flow.
  • the flow cross section of the secondary air duct can be changed by means of an adjusting element, for example a pivotable flap.
  • the secondary air duct branches off from the main air duct upstream of the heating element and opens out separately from the main air duct.
  • From the US Pat. No. 4,218,608 discloses a hair dryer which has a warm air duct for guiding an air flow heated with a heating device arranged therein and a cold air duct for guiding air to ambient temperature.
  • a first flap for controlling the air flow generated by a fan, which can optionally be introduced into the two air channels, is arranged upstream of a heating device.
  • the air flow of the warm air duct can be deflected by means of a second flap in such a way that it does not flow out towards the head of the user.
  • the residual heat of the heating device can be dissipated during cold air operation.
  • DE 29 00 983 C2 discloses a hair dryer with an air outlet duct, which is divided in the longitudinal direction into a warm air duct, which has an air heater, and a cold air duct.
  • the inlet opening of the hot air duct or the cold air duct can optionally be closed with a closure element designed as a guide flap, so that an air stream generated in a blower chamber is directed either into the warm air duct or into the cold air duct. This allows you to quickly switch between a warm air flow and a cold air flow.
  • DE 23 39 706 A discloses a hair dryer hood in which the Air displaced by a fan can be led through a warm air duct which a heating element is arranged, or through a short-circuit channel without a heating element. With the help of a shut-off element, openings can be made in the warm air duct and in the short-circuit duct more or less closed and thereby the air flows can be influenced by the individual channels. The cold and warm airflow can then be mixed.
  • the invention has for its object the generation of an air flow adjustable To enable temperature with the least possible effort.
  • the device according to the invention for generating a temperature-controlled air flow has a blower device for generating the air flow, a heating device for heating of the air flow and a warm air duct for guiding the air flow.
  • the Warm air duct is formed downstream of the heating device as a mixing chamber for mixing a flow of cold air that was not heated by the heater with the air flow heated by the heater.
  • the device according to the invention has the advantage that with simple means a constant temperature adjustment of the air flow is possible.
  • At least one air guiding element for promoting the mixing can be in the mixing chamber the cold air flow and the air flow heated by the heating device his. This has the advantage of being relative in terms of temperature distribution homogeneous airflow is generated.
  • the cross section of the warm air duct widens in the direction of flow seen increasingly towards the mixing chamber. This can be done easily A vacuum in the mixing chamber without any mechanically moving parts are generated, with the help of which cold air can be conveyed into the mixing chamber.
  • a metering device for varying the cold air flow can be provided. Ultimately, this allows the temperature of the air flow to be adjusted.
  • a cold air duct for guidance of the cold air flow is provided, which branches upstream of the heating device from the warm air duct and opens into the mixing chamber.
  • the cold air duct encloses the warm air duct in regions. This has the advantage that the warm air duct is in the enclosed area is shielded from the outside and thus the temperature of the components accessible from the outside the device according to the invention can be kept relatively low.
  • the metering device can be designed as a pivotable flap, the angle of attack is variable relative to the flow direction of the cold air flow, so that the cold air flow depends on the angle of attack.
  • the metering device can be used as one in the flow path of the cold air flow pivotable or slidable closure body his. In this embodiment, the cold air flow depends on how far the closure body is immersed in the flow path.
  • the metering device formed as two rotatable disks or rotating bodies be, each having at least one passage, the cold air flow from the respective set coverage of the diffusers depends.
  • the metering device also be designed as two mutually displaceable hollow bodies, by which at least one has a passage.
  • the metering device is designed as a tubular closure element, in the area of the mixing chamber inside or outside on the side wall of the warm air duct abuts and is displaceable or rotatable relative to the side wall. This has the advantage of reserving only a very small installation space for the metering device is.
  • the side wall of the warm air duct has in the preferred embodiment at least one passage in the area of the mixing chamber.
  • the device according to the invention In order to be able to cover the largest possible temperature range with the air flow, it may be advantageous to design the device according to the invention such that the Delivery rate of the blower device can be varied in stages. Corresponding leaves can be achieved in that the heating power of the heating device can be varied in stages is.
  • FIG. 1 shows a schematic diagram for the construction of a first variant of the invention Device for generating a temperature-controlled air flow.
  • the individual functional elements are only shown symbolically.
  • the device has a warm air duct 1, which at one end through an inflow opening 2 and at its the other end, an outflow opening 3 is limited.
  • a fan 4 for generating an air flow is arranged in the warm air duct 1, the Flow behavior is indicated by arrows.
  • 1 is in the warm air duct Heating element 5 arranged to heat the air flow. Between the fan 4 and the heating element 5 branches off a cold air duct 6 from the warm air duct 1 and opens upstream of the heating element 5 back into the warm air duct 1.
  • the cold air duct 6 In the cold air duct 6 is one Dosing device 7 arranged to influence the cold air flow. In the field of The mouth of the cold air duct 6 into the warm air duct 1 is the warm air duct 1 as one Mixing chamber 8 is formed and has air guide elements 9 to promote mixing of warm air and cold air flow.
  • the temperature of the hot air flow can be set:
  • the blower 4 sucks in air from the environment via the inflow opening 2 and sets an air flow in the direction of outflow opening 3 in progress. Part of the airflow happens the heating element 5 and is thereby heated. Another part of the air flow is in the Cold air duct 6 led around the heating element 5 and maintains its temperature essentially at.
  • the two partial air flows are brought together again in the mixing chamber 8, whereby the mixing is promoted by the air guide elements 9, so that a mixing temperature occurs that is between the temperatures of the two Partial air flows.
  • the mixing temperature can vary between the mixing ratio the warm air flow and the cold air flow can be influenced, so that by varying of the cold air flow by means of the metering device 7 ultimately the temperature of the generated air flow can be adjusted. That way as desired Temperature-controlled air flow finally passes through the outflow opening 3 of the warm air duct 1 and can be used for the desired application.
  • FIG 2 shows a schematic diagram for the construction of a second variant of the invention Contraption.
  • the type of presentation and the description of each Functional elements were chosen according to Figure 1.
  • the device according to the invention has the warm air duct 1 with the inflow opening 2, the outflow opening 3, the blower 4 and the heating element 5.
  • a special feature The second variant is that the heating element 5 is located downstream of the Cross section of the warm air duct 1 extended to the mixing chamber 8.
  • Another specialty consists in the mixing chamber 8, in which in turn the air guide elements 9 are arranged, connected to a further inflow opening 10 via the metering device 7 through which air can flow in from the environment.
  • the second variant differs considerably in terms of its functionality from the first variant.
  • the second variant also uses the blower 4 and the heating element 5 in the warm air duct 1 generates a warm air flow.
  • the cold air supply In contrast to the first variant, however, cold air is drawn in from the Surroundings.
  • By expanding the cross section of the hot air duct 1 arises in Area of the mixing chamber 8 a negative pressure, with the help of cold air over the other Inflow opening 10 is sucked in from the environment and through the dosing device 7 is conveyed into the mixing chamber 8, where it mixes with the hot air flow.
  • the strength of the cold air flow and the mixing temperature w ith the Dosing device 7 controlled.
  • first and the second variant for example by one at the further inflow opening 10 in the second variant Cold air duct 6 connects according to the first variant.
  • FIG. 3 shows a preferred embodiment of the first variant of the invention Device in a schematic sectional view.
  • the blower 4 and that Heating element 5 are only shown symbolically in this illustration.
  • the hot air duct 1 is cylindrical and over a wide range of its axial extent concentrically from also cylindrical trained cold air duct 6 surround. In this way, the temperature the parts accessible from the outside are kept relatively low.
  • the side wall of the warm air duct 1 in one or more partial areas broken through its circumference, d. H. there is at least one passage 11, can reach the mixing chamber 8 via the cold air from the cold air duct 6.
  • the Passage 11 can be by means of a cylindrical closure element 12 which is on the outside of the Side wall of the warm air duct 1 is closed.
  • the closure element 12 pivotally arranged on the side wall of the hot air duct 1 and has at least one passage 13, which by pivoting the closure element 12 more or less strong with the at least one passage 11 in the side wall of the warm air duct 1 can be made to coincide, so that the flow cross section for the cold air can be varied.
  • the structure and how it works of the closure element 12 are explained in detail with reference to FIGS. 4, 5 and 6, which show the closure element 12 in different pivot positions.
  • FIG. 4 schematically shows the warm air duct 1 with the closure element 12 attached in cross section.
  • the cut was made along line AA shown in FIG. 3.
  • the side wall of the warm air duct has 1 has a passage 11 which extends almost over half the circumference.
  • the Passage 13 in the closure element 12 is designed accordingly.
  • the passages 11 and 13 overlap the pivoting position of the closure element 12 about half, d. H. it is approximately half of the maximum possible flow cross-section released for the inflow of cold air into the mixing chamber 8.
  • FIG. 5 shows the closure element 12 in otherwise the same representation as FIG another pivot position in which there is no overlap of the passage 13 in Closure element 1 2 with the passage 11 in the side wall of the hot air duct 1 comes.
  • the outflow opening 3 of the hot air duct 1 emerging air flow has its maximum adjustable temperature.
  • Figure 6 finally shows that in a representation corresponding to Figures 4 and 5 Locking element 12 in the fully open position, i. H. the closure element 12 is pivoted in such a way that the passage 13 of the closure element 12 is at the maximum the passage 11 in the side wall of the hot air duct 1 overlaps. It will be the maximum possible flow cross-section for the inflow of cold air into the mixing chamber 8 released, which in turn leads to the minimum adjustable temperature of the the outflow opening 3 of the warm air duct 1 leading air flow.
  • any intermediate positions are possible, so that the temperature of the Air flow can be adjusted continuously.
  • the setting is not with one figurative setting lever or setting wheel or with a similar setting mechanism performed. If desired, you can use the adjustment mechanism a graded setting can also be realized.
  • a modification is also possible in which the closure element 12 bears against the inside of the side wall of the warm air duct 1.
  • Other geometries are also available possible for the formation of the passages 11 and 13.
  • An example of another Geometry is shown in Figure 7.
  • FIG. 7 shows the same representation as that used in FIGS. 4, 5 and 6 was another embodiment for the formation of the passages 11 and 13 in the side wall of the warm air duct 1 and in the closure element 12.
  • two passages 11 and two passages 13 are provided, each are arranged diametrically opposite on the circumference.
  • This formation of the passages 11 and 13 has the consequence that the cold air flow better over the circumference of the cold air duct 6 distributes and thus especially the temperature of the parts accessible from the outside can be kept low.
  • the temperature setting for the closure element 12 is not quite as sensitive as in the embodiment according to Figures 4, 5 and 6.
  • more passages 11 and 13 can also be provided.
  • the closure element 12 cannot be pivoted, but slidably arranged on the side wall of the warm air duct 1.
  • the culverts 11 and 13 in the side wall of the warm air duct 1 and in the closure element 12 are then more or less by axially moving the closure element 12 strongly coincident and so the flow cross-section varies.
  • practically the entire scope for the training of Passages 11 and 13 are available.
  • the closure element 12 can not only be used to adjust the flow cross section be used between the cold air duct 6 and the mixing chamber 8, but also in cases where there is no cold air duct 6 and the mixing chamber 8 instead Cold air is supplied from the environment via the further inflow opening 10. In these In some cases, the inflow cross section is varied with the closure element 12.
  • the closure element 12 used in the preferred exemplary embodiment can also be configured differently within the scope of the invention be used.
  • the individual exemplary embodiments for the metering device can 7 both for influencing the through the cold air duct 6 in the Mixing chamber 8 flowing air flow as well as that from the environment into the mixing chamber 8 flowing air flow can be used.
  • the following working examples for the metering device 7 are therefore only based on an installation situation described in the cold air duct 6.
  • Figure 8 shows the cold air duct 6 with a pivotable flap 14 schematically in Longitudinal section.
  • the flap 14 is pivotable about an axis lying in its plane and closes the cold air duct 6 completely when it is in a position perpendicular to the longitudinal axis of the cold air duct 6 a takes. This is in a position parallel to the longitudinal axis Flap 14 the cold air duct 6, however, completely free, so that the maximum flow cross section is available.
  • FIG 9 shows a modification of the embodiment of Figure 8 in the same representation.
  • the flap 14 is similar to a blind in this modification into individual slats 15 divided, which are each pivotable about their longitudinal axis. This is the pivotal movement not so expansive, so that less space is required.
  • the single ones Slats 15 are usually pivoted synchronously.
  • FIG. 10 shows an exemplary embodiment in a representation corresponding to FIGS. 8 and 9 shown, in which the cold air duct 6 can be closed by means of a slide 16 is.
  • the slide 16 is displaced linearly perpendicular to the longitudinal axis of the cold air duct 6 and thereby the cross-sectional area of the cold air duct blocked by the slide 16 6 varies.
  • a pivotable Washer instead of the slider 16 there is a pivotable Washer used, more or less about a pivot axis perpendicular to its main surface is pivoted less far into the cold air duct 6.
  • disk several individual segments for example reproduce the function of an iris diaphragm and in this way one Allow variation of the free cross section of the cold air duct 6.
  • the disc is partially perforated and around its center is rotatable relative to a second, appropriately designed disk, so that the free cross section of the cold air duct 6 depends on how strong the perforations of the two Discs are brought into register with each other.

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  • 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)
  • Duct Arrangements (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Temperature (AREA)
EP03012708A 2002-06-14 2003-06-04 Appareil pour la production d'un écoulement de l'air chaud Expired - Lifetime EP1371302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10226658 2002-06-14
DE10226658A DE10226658A1 (de) 2002-06-14 2002-06-14 Vorrichtung zur Erzeugung eines temperierten Luftstroms

Publications (2)

Publication Number Publication Date
EP1371302A1 true EP1371302A1 (fr) 2003-12-17
EP1371302B1 EP1371302B1 (fr) 2005-08-17

Family

ID=29557835

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Application Number Title Priority Date Filing Date
EP03012708A Expired - Lifetime EP1371302B1 (fr) 2002-06-14 2003-06-04 Appareil pour la production d'un écoulement de l'air chaud

Country Status (4)

Country Link
EP (1) EP1371302B1 (fr)
AT (1) ATE301949T1 (fr)
DE (2) DE10226658A1 (fr)
ES (1) ES2247454T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076885A2 (fr) 2010-12-08 2012-06-14 Jemella Limited Sèche-cheveux

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1707554A (en) * 1928-02-13 1929-04-02 Halliwell Shelton Electric Cor Hair drier
US2090165A (en) * 1935-03-20 1937-08-17 Eastern Lab Inc Multiple service hair drier or the like
DE1407565A1 (de) * 1960-07-01 1968-12-05 Gen Electric Haartrockner
DE1757436B1 (de) * 1967-05-09 1975-05-15 Ronson Corp Elektrischer Haartrockner
WO1994023611A1 (fr) * 1993-04-16 1994-10-27 Beautronix (Hong Kong) Limited Seche-cheveux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1707554A (en) * 1928-02-13 1929-04-02 Halliwell Shelton Electric Cor Hair drier
US2090165A (en) * 1935-03-20 1937-08-17 Eastern Lab Inc Multiple service hair drier or the like
DE1407565A1 (de) * 1960-07-01 1968-12-05 Gen Electric Haartrockner
DE1757436B1 (de) * 1967-05-09 1975-05-15 Ronson Corp Elektrischer Haartrockner
WO1994023611A1 (fr) * 1993-04-16 1994-10-27 Beautronix (Hong Kong) Limited Seche-cheveux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012076885A2 (fr) 2010-12-08 2012-06-14 Jemella Limited Sèche-cheveux
US10492585B2 (en) 2010-12-08 2019-12-03 Jemella Limited Hair dryer

Also Published As

Publication number Publication date
DE50300982D1 (de) 2005-09-22
ATE301949T1 (de) 2005-09-15
DE10226658A1 (de) 2005-06-30
EP1371302B1 (fr) 2005-08-17
ES2247454T3 (es) 2006-03-01

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