WO1979001148A1 - Appareil a main a air chaud pour le degivrage des vitres des automobiles - Google Patents

Appareil a main a air chaud pour le degivrage des vitres des automobiles Download PDF

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Publication number
WO1979001148A1
WO1979001148A1 PCT/DE1979/000052 DE7900052W WO7901148A1 WO 1979001148 A1 WO1979001148 A1 WO 1979001148A1 DE 7900052 W DE7900052 W DE 7900052W WO 7901148 A1 WO7901148 A1 WO 7901148A1
Authority
WO
WIPO (PCT)
Prior art keywords
outlet
hot air
designed
slot
outflow
Prior art date
Application number
PCT/DE1979/000052
Other languages
German (de)
English (en)
Inventor
W Landsrath
Original Assignee
Landsrath Walter
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 DE19782823637 external-priority patent/DE2823637A1/de
Priority claimed from DE19787823478 external-priority patent/DE7823478U1/de
Application filed by Landsrath Walter filed Critical Landsrath Walter
Publication of WO1979001148A1 publication Critical patent/WO1979001148A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00457—Ventilation unit, e.g. combined with a radiator
    • B60H1/00464—The ventilator being of the axial type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S3/00—Vehicle cleaning apparatus not integral with vehicles
    • B60S3/04—Vehicle cleaning apparatus not integral with vehicles for exteriors of land vehicles
    • B60S3/044—Hand-held cleaning arrangements with liquid or gas distributing means

Definitions

  • the invention relates to a motor vehicle hot air blower designed as a hand-held device, which is designed for battery operation and has radiators arranged in the flow path of the 5 blower air and an outlet nozzle as hot air outlet, in which at least one outflow channel is designed with a slot-shaped outlet mouth.
  • Such a hot air blower is from DE-GM
  • the outlet nozzle is designed here as a slot die, the mouth slot of which is relatively narrow, so that the heated fan air has the highest possible flow velocity and the heat transfer from the hot air flowing out to the window to be de-iced is as large as possible.
  • the area swept by the hot air is also relatively small, so that if the panes are more iced up, a considerable amount of time remains until the ice has thawed over the entire pane.
  • the invention provides a motor vehicle hot air blower designed as a hand-held device for defrosting motor vehicle windows, in which large window surfaces can be defrosted in a short time without significantly increasing the heating and / or blower output.
  • a plurality of outflow ducts which are tapering toward their slot-shaped outlet mouth are formed in the outlet nozzle, the slot-shaped outlet mouths of which run at a distance from one another and on the wall of which the radiators are arranged.
  • the arrangement of a plurality of slot-shaped outlet orifices spaced next to one another at a distance can be relatively narrow for the highest possible exit velocity of the hot air, while the outflowing hot air nevertheless acts on a much larger disk area than the cross-sectional area of the outlet orifices.
  • part of the hot air streams emerging from the adjacent slot-shaped outlet orifices is deflected towards one another at the disks to be de-iced. All of this leads to a significantly better utilization of the heat transferred by the hot air to the pane to be de-iced for thawing the pane covering ice or snow.
  • a substantial part of the hot air flowing out along the * slot edges flows off to the side without reaching the pane surface to be de-iced, so that a substantial part of the heat transferred to the fan air by the radiators remains unused.
  • the invention therefore makes great use of the heat content of the hot air to defrost the pane, so that despite a higher defrosting efficiency an increase in the blower and heating capacity is not necessary and a relatively large pane area can be defrosted effectively in a short time.
  • the slot-shaped outlet orifices preferably extend at equal distances from one another along their length. You can run curved, for example, be designed as concentric ring slots. However, it is preferred that the slot-shaped outlet orifices are rectangular in cross section and run parallel to one another.
  • the mouth cross section of the outer outflow channels is smaller than that of each outflow channel lying between them.
  • inlet cross sections of the outflow ducts for the blower air which are of approximately the same size, this is distributed to the outflow ducts on account of the outlet pressure which is essentially the same across the outlet orifices of the outflow ducts and is subjected to such flow conditions that the two outer outflow ducts are heated to a greater extent air flowing through takes place as in each of the narrowing less than the outer outflow channels
  • the cross-section of the mouth of the outer outflow channels is advantageously half as large as that of each outflow channel lying between them.
  • outflow channels with a slot-shaped outlet mouth can also be formed in the outlet nozzle
  • three outflow channels are preferably provided, of which at least the two outer outflow channels extend continuously from the inlet side of the outlet nozzle.
  • the middle outlet channel can also have a cross-section that is constant over its length.
  • the two outer outlet channels are expediently equipped with radiators on their wall surfaces adjacent to the middle outlet channel, while the middle outlet channel on both of them adjoins the outer outlet channel Wall surfaces is provided with radiators.
  • the radiators can be designed in a manner known per se, in particular as electrical resistance wires, which preferably run along almost the entire length of the outflow ducts at a distance from their wall surface, so that they are washed all around by the blown air flowing past.
  • electrical resistance wires which preferably run along almost the entire length of the outflow ducts at a distance from their wall surface, so that they are washed all around by the blown air flowing past.
  • a suitable distribution and design of the heating wires for example in the form of coils, can produce a turbulent flow in their area in order to achieve the best possible heat transfer to the air to be heated .
  • the hot air blower according to the invention can also be equipped with a cable with a plug attached to it for the socket of the cigarette lighter of motor vehicles. If applicable
  • such a motor vehicle hot air blower is created. which is particularly compact and small, so that it takes up little space and can, for example, be kept within reach in the glove compartment of the vehicle.
  • the housing is tubular with an outlet nozzle formed on the one tube end and the air inlet opening formed on the other tube end, while at the one tube end, preferably the tube end having the outlet nozzle, a rod-shaped hand is fastened to the tubular housing and can be folded down and out of the free end of the handle the cable is led out.
  • the device according to the invention can also be held on the outstretched arm on the handle that is then extended and can be handled in the desired position.
  • the joint on which the handle is articulated to the tubular housing is designed in a self-locking manner in such a way that intermediate positions for the handle are also possible without the device itself being able to pivot about the joint under its weight.
  • the cable can be firmly attached in the end of the handle. be closed.
  • a connecting socket is disposed, while 'has the cable a sleeve for insertion in this Connection designed mating connector in the end of the handle.
  • a commercially available connection socket is preferably used, which is designed in the manner of the connection socket of the cigarette lighter of the motor vehicle.
  • the invention thus creates a motor vehicle hot air blower for defrosting motor vehicle windows, which has a high degree of efficiency with a relatively low output and also effectively defrosts heavily icy windows in a short time.
  • FIG. 1 is a schematic perspective representation of a first embodiment of a motor vehicle hot air blower
  • FIG. 2 shows the section corresponding to the arrows in FIG. 1 through the outlet nozzle of the hot air blower
  • OMPI Fig. 3 is a partially sectioned side view of a second embodiment.
  • the hot air blower 1 contains a conventional radial fan, to the tangential outlet opening of which a box-shaped outlet nozzle 2 is connected.
  • the hot air blower is designed for operation with a motor vehicle battery and can be connected to the socket of the cigarette lighter of the motor vehicle via the cable 10 and the plug 11.
  • a bow-shaped handle 14 is attached to the housing of the radial air blower.
  • the blower air is drawn in through the suction opening 13 covered with a grille.
  • the cable can be wound onto hooks 12 attached to the side of the housing of the radial fan.
  • the outlet nozzle 2 has a plurality of slit-shaped outlet openings 3, 4, 5 at its mouth, which in the embodiment shown run parallel to the narrow sides of the outlet nozzle 2 at a distance from one another.
  • the outlet openings 3, 4, 5 it is also possible for the outlet openings 3, 4, 5 to be parallel to the
  • outlet nozzle 2 shows a section through the outlet nozzle perpendicular to the slot-shaped outlet openings 3, 4, 5. Over the entire length of the outlet nozzle 2, three outflow channels 6, 7, 8 are formed in it, which are located on the inlet side 15 of the outlet nozzle 2 have the same inlet cross-section and taper from there to the outlet openings 3, 4, 5 in a wedge shape.
  • the Aus ⁇ flow channels 6, 7, 8 are in the interior of the outlet ⁇ 2 of heat-resistant and electrically insulating plates 16, for example, mica or ceramic plates, be ⁇ borders at which substantially the entire length of the outflow channels 6, 7, 8 towards Radiator 9 in the form of heating helices wound from electrical resistance wire are clamped, which are electrically connected (not shown) to two line wires of the connecting cable in the manner customary for heating wires of 'hot fans'.
  • the two outer outflow ducts 6, 8 are equipped with radiators only on their boundary wall adjacent to the middle outflow duct 7, while the middle outflow duct 7 is equipped with radiators 9 on both boundary walls adjacent to the outer outflow ducts 6, 8 is.
  • the two slit-shaped outlet orifices 3, 5 of the two outer outflow channels 6 and 8 have a smaller slot width than the slit-shaped outlet orifice 4 of the central outflow channel 7. Due to the resulting different pressures and flow velocities in the outer outflow ducts 6, 8 on the one hand and the middle outflow duct 7 on the other hand results in a higher temperature for the blower air emerging from the outer outlet openings 3, 5 than for the blower air emerging from the middle outlet mouth 4. As a result, an approximately fan-shaped flow field with curtain-like hot air flows on the two opposite sides of the flow field is obtained at the outlet of the outlet nozzle 2, while the air flow emerging from the central outlet mouth 4 has a lower temperature.
  • the middle field of the window to be de-iced receives an additional heat between the two outer air flows in addition to the heat supplied by the middle air flow.
  • outlet nozzle 2 is shown in FIG. 2 with an overall rectangular longitudinal section, it can, as can be seen from FIG. 1, also have an overall trapezoidal longitudinal section, the large trapezoidal side of which forms the outlet side of the outlet nozzle 2.
  • the hot air blower shown in FIG. 3 has a tubular housing 20, at the front end of which an outlet nozzle 2 is formed with a rectangular outline, in which three outflow channels 6, 7 and 8 are formed at a mutual distance from one another.
  • ge taper the two äu ⁇ ßren outflow channels 6 and 8 to their respective Aus ⁇ occurs muzzle '3, 5 out while the central outflow channel 7 has a round constant over its length für ⁇ strömquerterrorism and its outlet opening 4 is larger in cross-section than each of the outlet orifices 3, 5 of the outer outflow ducts 6, 8.
  • an electrical heating device is arranged in the path of the incoming blower air.
  • an electric motor 22 is supported in the housing 20 by means of projecting ribs 25 such that a ring channel 26 for the air supplied to the outlet nozzle 2 is present around the motor 22.
  • the shaft 30 of the motor 22 is opposed by this on that of the outlet nozzle 2 1 set down side and carries an impeller, which consists of a guide body 23 which increases towards the motor 22 to its diameter, with vanes 24 projecting radially thereon.
  • a cover plate 27 is inserted, which has an air inlet opening 13 in the center of a much smaller diameter than the outer diameter of the impeller, so that the air flows centrally into the impeller and according to the arrows shown in the ring channel 26 is promoted.
  • a support bracket 31 is integrally formed thereon, to which a handle 21 is articulated via a swivel joint 32,
  • the handle 21 has
  • connection socket 28 is designed in the manner of the socket of the cigarette lighter of a motor vehicle.
  • the associated cable 10 has at its one end a correspondingly designed mating connector 29 and at its other end a second connector 11, which fits into the socket of the cigarette lighter.
  • the length of the cable 10 is relatively long,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'appareil a main a air chaud pour le degivrage des vitres des automobiles comprend plusieurs canaux d'ecoulement allonges (6, 7, 8) s'etendant dans la tuyere de sortie (2) jusqu'a leur bouche de sortie (3, 4, 5) en forme de fente, ces bouches de sortie (3, 4, 5) etant ecartees l'une de l'autre; des corps de chauffe (9) sont disposes sur les parois des canaux (6, 7, 8). Les canaux d'ecoulement (6, 7, 8) et/ou leurs corps de chauffe (9) peuvent etre etudies dans le but d'obtenir une plus haute temperature de l'air souffle dans les bouches exterieures (3, 5) que dans la bouche centrale (4).
PCT/DE1979/000052 1978-05-30 1979-05-30 Appareil a main a air chaud pour le degivrage des vitres des automobiles WO1979001148A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2823637 1978-05-30
DE19782823637 DE2823637A1 (de) 1978-05-30 1978-05-30 Als handgeraet ausgebildetes kraftfahrzeug-heissluftgeblaese
DE19787823478 DE7823478U1 (de) 1978-08-04 1978-08-04 Batteriebetriebenes Kraftfahrzeug-Heißluftgebläse

Publications (1)

Publication Number Publication Date
WO1979001148A1 true WO1979001148A1 (fr) 1979-12-27

Family

ID=25774592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1979/000052 WO1979001148A1 (fr) 1978-05-30 1979-05-30 Appareil a main a air chaud pour le degivrage des vitres des automobiles

Country Status (1)

Country Link
WO (1) WO1979001148A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904844A (en) * 1989-04-10 1990-02-27 Chamberlin Dale L Remotely operated windshield defrost
NL1035784C2 (en) * 2008-08-04 2009-05-26 Srikantharajah Paramanathan DC portable hand blowing apparatus for removing water, water / oil mixed particles, and etc. off the car or any other vehicles.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2212597A1 (de) * 1972-01-14 1973-07-19 Heinz Rattunde Blitzentfroster fuer kfz-scheiben, insbesondere frontscheiben
DE2162667A1 (de) * 1971-12-17 1973-09-20 Heinz Rattunde Blitzentfroster fuer kfz.-scheiben, insbesondere frontscheiben
DE2607582A1 (de) * 1976-02-25 1977-09-01 Wolfgang Friedrich Klebba Auto-enteiser-foen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162667A1 (de) * 1971-12-17 1973-09-20 Heinz Rattunde Blitzentfroster fuer kfz.-scheiben, insbesondere frontscheiben
DE2212597A1 (de) * 1972-01-14 1973-07-19 Heinz Rattunde Blitzentfroster fuer kfz-scheiben, insbesondere frontscheiben
DE2607582A1 (de) * 1976-02-25 1977-09-01 Wolfgang Friedrich Klebba Auto-enteiser-foen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4904844A (en) * 1989-04-10 1990-02-27 Chamberlin Dale L Remotely operated windshield defrost
NL1035784C2 (en) * 2008-08-04 2009-05-26 Srikantharajah Paramanathan DC portable hand blowing apparatus for removing water, water / oil mixed particles, and etc. off the car or any other vehicles.

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