DE2729297A1 - Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed - Google Patents

Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed

Info

Publication number
DE2729297A1
DE2729297A1 DE19772729297 DE2729297A DE2729297A1 DE 2729297 A1 DE2729297 A1 DE 2729297A1 DE 19772729297 DE19772729297 DE 19772729297 DE 2729297 A DE2729297 A DE 2729297A DE 2729297 A1 DE2729297 A1 DE 2729297A1
Authority
DE
Germany
Prior art keywords
increase
fan
slot
blades
desk
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.)
Pending
Application number
DE19772729297
Other languages
German (de)
Inventor
Heinfried Plettner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19772729297 priority Critical patent/DE2729297A1/en
Publication of DE2729297A1 publication Critical patent/DE2729297A1/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades

Abstract

The desk or table top fan has an impeller with radial blades on a hub which is mounted directly on the shaft. There is a slot in each blade. The effect of the slot is to break up the air and thus increase the volume delivered by the fan to increase the cooling effect at periods of very high temperature. This avoids the expense of a special motor to operate the fan at high speed. The slot is preferably parallel to the axis of the blade but may also be perpendicular or inclined to the axis of the blade.

Description

nachqereichtISubsequently submitted I.

Ventilator zur FrischlufterzeugungFan for generating fresh air

Die Erfindung betrifft einen Ventilator mit Ventilatorflügeln zur Frischlufterzeugung.The invention relates to a fan with fan blades for generating fresh air.

Bekanntlich kann man mit Ventilatoren, die z.B. auf einen Schreibtisch gestellt werden, eine Luftbewegung erzeugen. Man spricht in diesem Zusammenhang auch von Frischlufterzeugung. Bei besonders warmer Umgebungstemperatur reicht die Frischlufterzeugung in vielen Fällen nicht aus. Es ist daher bekannt, die Ventilatoren so auszubilden, daß sich die Drehzahl der Ventilatorflügel stufenweise erhöhen läßt, womit auch die Frischlufterzeugung erhöht wird. Um die Möglichkeit der Erhöhung der Drehzahl der Ventilatorflügel vorzusehen, sind besonders gestaltete Antriebsmotoren für den Ventilator erforderlich. Deshalb sind solche Ventilatoren relativ teuer.As is well known, you can use fans that e.g. Be placed on a desk, create a movement of air. In this context, one also speaks of fresh air generation. at The generation of fresh air is sufficient when the ambient temperature is particularly warm in many cases does not work out. It is therefore known to design the fans so that the speed of the fan blades can be increased gradually, which also increases the fresh air production. To the possibility of increasing the speed To provide the fan blades, specially designed drive motors are required for the fan. That's why such fans are relatively expensive.

Der Erfindung liegt die Aufgabe zugrunde, eine Erhöhung der Frischlufterzeugung zu erreichen, ohne daß hierzu im Vergleich zu den bekannten Ventilatoren eine Erhöhung der Drehzahl der Ventilatorflügel erforderlich ist.The invention is based on the object of increasing the generation of fresh air without making a comparison to the known fans an increase in the speed of the fan blades is required.

Zur Lösung dieser Aufgabe ist bei der Erfindung vorgesehen, daß die Ventilatorflügel mit schlitzförmigen öffnungen versehen sind. To solve this problem, the invention provides that the fan blades are provided with slot-shaped openings .

Durch die schlitzförmigen öffnungen in den Ventilatorflügeln wird in besonderem Maße ein "Zerhacken" der Luft erreicht, was dazu führt, daß eine erhöhte Frischlufterzeugung erreicht wird. Im Einklang damit wird also die Leistungsfähigkeit des Ventilators erhöht. Due to the slot-shaped openings in the fan blades, a "chopping up" of the air is achieved to a particular degree, which leads to the fact that an increased fresh air production is achieved. The performance of the Fan increased.

809682/0297809682/0297

Die schlitzförmigen Öffnungen sind zweckmäßig in Längsrichtung der Ventilatorflügel angeordnet. In vorteilhafter Weise können die schlitzförmigen Öffnungen aber auch quer oder schräg zur Längsrichtung der Ventilatorflügel angeordnet sein.The slot-shaped openings are expediently in the longitudinal direction the fan blades arranged. Advantageously, the slot-shaped openings can also be transverse or inclined be arranged to the longitudinal direction of the fan blades.

809882/0297809882/0297

Claims (4)

EIKENBERG & BRÜMMERSTEDTEIKENBERG & BRÜMMERSTEDT PATENTANWÄLTE IN HANNOVERPATENT LAWYERS IN HANOVER NAOHOERBOHTNAOHOERBOHT Heinfried Plettner 489/1Heinfried Plettner 489/1 Patentansprüche:Patent claims: Ventilator mit Ventilatorflügeln zur Frischlufterzeugung, dadurch gekennzeichnet, daß die Ventilatorflügel mit schlitzförmigen Öffnungen versehen sind.Fan with fan blades for generating fresh air, characterized in that the fan blades are provided with slot-shaped openings. 2. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß die schlitzförmigen Öffnungen sich in Längsrichtung der Ventilatorflügel erstrecken.2. Fan according to claim 1, characterized in that the slot-shaped openings extend in the longitudinal direction of the fan blades. 3. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß die schlitzförmigen Öffnungen quer zur Längsrichtung der Ventilatorflügel angeordnet sind.3. Fan according to claim 1, characterized in that the slot-shaped openings are arranged transversely to the longitudinal direction of the fan blades. 4. Ventilator nach Anspruch 1, dadurch gekennzeichnet, daß die schlitzförmigen Öffnungen schräge zur Längsrichtung der Ventilatorflügel angeordnet sind.4. Fan according to claim 1, characterized in that the slot-shaped openings are arranged obliquely to the longitudinal direction of the fan blades. - Beschreibung -- Description - 809*8^028?809 * 8 ^ 028?
DE19772729297 1977-06-29 1977-06-29 Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed Pending DE2729297A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772729297 DE2729297A1 (en) 1977-06-29 1977-06-29 Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772729297 DE2729297A1 (en) 1977-06-29 1977-06-29 Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed

Publications (1)

Publication Number Publication Date
DE2729297A1 true DE2729297A1 (en) 1979-01-11

Family

ID=6012662

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772729297 Pending DE2729297A1 (en) 1977-06-29 1977-06-29 Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed

Country Status (1)

Country Link
DE (1) DE2729297A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295353A1 (en) * 1987-06-13 1988-12-21 Khammas, Achmed Adolf Wolfgang Rotorblade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295353A1 (en) * 1987-06-13 1988-12-21 Khammas, Achmed Adolf Wolfgang Rotorblade

Similar Documents

Publication Publication Date Title
DE1291090B (en) Device for generating an air flow
DE19643362C2 (en) wind generator
DE2729297A1 (en) Desk or table top fan - has slots in blades to increase air vol. delivered without increase of speed
DE3303148A1 (en) Externally ventilated, force-ventilated electric-motor drive
DE3842697A1 (en) HIGH PRESSURE BLOWER
DE1006950B (en) Electric tool driven by a three-phase motor
DE10237133A1 (en) Heat exchanger-turbine arrangement for use in refrigerator, especially domestic refrigerator, has magnet in fluid flow line coupled to turbine in line to generate rotating magnetic field outside line
DE8302564U1 (en) FOREIGN VENTILATED VENTILATED VENTILATED ELECTRIC MOTOR DRIVE
EP1589230A1 (en) Ventilator for a freezer
DE1961238C3 (en) Electric compressor for acoustic warning devices
DE1428195A1 (en) Room heater equipped with a fan and method for generating a gas flow
DE546041C (en) Etching machine
DE1503501C3 (en) Cross-flow fans, especially room fans
DE2165419A1 (en) FAN UNIT
DE2145919A1 (en) ENCLOSED ELECTRIC AC MACHINE WITH EXTERNAL RUNNER
DE2165610C3 (en) Impeller for centrifugal fans
DE569037C (en) Device for cooling electric oscillating armature motors
AT377394B (en) ASYNCHRONOUS ELECTRIC MOTOR WITH VARIABLE SPEED
DE2211208A1 (en) DRIVE A FAN WHEEL
DE810785C (en) Resistance converter for converting direct current into alternating current
DE2846277A1 (en) Electric fan for kitchen oven or air cooler - has one bearing plate as integral part of bracket that holds motor to casing
FR2288232A1 (en) Bladed fan or propellor - has blades on rotor arm mounted on shaft by ball bearings at centre
DE6940382U (en) ROOF VENTS
DE2556064A1 (en) MOTOR FAN
DE2165610B2 (en) Centrifugal fan impeller with blades between rear and front disc - provided with openings and has blades curved along their lengths

Legal Events

Date Code Title Description
OD Request for examination
OHN Withdrawal