DE202008005703U1 - Fan, device for ventilation of premises - Google Patents

Abstract

fan characterized in that it has two or more blades which consist of two or more segment surfaces.

Description

Fan, Device for ventilation of premises, The invention falls under the field of technical turbomachinery.

State of the art:

In the previously known fans of this type, known after DE 200 01 946 U1 or DE 3814612 A1 the wings are arranged on one or more rotors and is provided with a continuous wing with planar configuration of the blade as below DE 28 21 142 A1 , possibly the rotors can additionally perform rotary and or pivoting movements. The wing surface is made of rigid material with / without cutouts or inserts. The wing surface has a constant angle of attack or is curved in itself as in DE 20 2005 019 433 U1 has entangled entry or exit edges and / or angled wing tips, but no aerodynamic profile.

By The design results in a lower tangential velocity in the center the wing and thus an uneven Flow velocity of moving air with decreasing Air delivery to the center of the axis of rotation and thus a smaller Efficiency which compensate with increased speed must become. Further reduces the formation of the wings without aerodynamic profile the overall efficiency of the fan.

At each wing end creates a large induced Resistance with correspondingly strong turbulence of the air. The generated Airflow is not uniform and is considered drafts perceived and is with appropriate noise connected.

Problem:

Of the Invention is based on the object, a fan in such a way that a quieter, more even Air flow is generated, which is perceived as pleasant. The aerodynamic quality of the fan should be improved so that at the same volume flow a lower speed and thus an improvement of the overall efficiency is to be achieved, and achieved a total reduction in noise can be.

Of further, a design is to be found in the large also Fans can be produced inexpensively.

fan for protection claim 1, characterized in that the blades consist of several segment area which in itself have aerodynamic profile, the blades have a gap between the individual segment surfaces and have a defined aerodynamic angle of attack. The number of blades is two or more and the number of individual segments is two or more.

The Surface of the blade is made of flexible or solid lightweight material which is characterized by a lightweight Carrier structure is maintained.

By the interruption of the wing segments, it comes to a Reduction of the induced resistance and the generated thereby Whirling at the wing tips, making one as pleasant perceived airflow can be generated, and a further noise reduction can be achieved.

Of the different aerodynamic angles of attack of the wings compensates for the different tangential speed and improves the uniformity of the flow and the efficiency.

The Design is lightweight and easy and inexpensive Furthermore, there is an inherent growth potential so that with higher number of wings and / or enlarged segment areas also large Rooms can be ventilated efficiently.

The Noise is lower than in known solutions and it can achieve greater energy efficiency become.

Of the Volume flow is more uniform and thus becomes felt as a pleasant. The wing segments can simply created in different designs become.

to Explanation of the invention will now be made to the drawings taken a preferred embodiment of illustrates the invention, which illustrates their features and advantages.

The in 1 Ceiling fan shown has a rotor 2 on the around the axis of rotation 1 which rotates with the Fußbauteil 6 on the building ceiling 7 is attached. The drive can be in the rotor 2 or in the foot component 6 be housed. To the rotor are attached two or more wings formed of two or more individual wing segments. The wing segments are formed of lightweight material, such as fabric, foil, or the like, and a very light support structure 3 connected to the rotor.

Each segment receives a special angle of attack (a, b, c) with respect to the plane of rotation of the rotor. The individual wing segments 4 have a shape which forms a predefined aerodynamic profile. The segment column 5 ensure that the induced resistance is reduced and an improved quality of the air flow is generated. components 1 and 6 can be designed in a different design so that the fan can also be operated standing.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 20001946 U1 [0002]
• - DE 3814612 A1 [0002]
• - DE 2821142 A1 [0002]
• - DE 202005019433 U1 [0002]

Claims (6)

Ventilator characterized in that it comprises two or more blades, which consist of two or more segments surfaces. Fan according to claim 1, characterized the wing segments have an aerodynamic profile. Fan according to claim 1, characterized that the individual segments have their own aerodynamic angle of attack exhibit. Fan according to claim 1, characterized that the blades have a defined gap have between the individual segment areas. Fan according to claim 1, characterized that the surface of the wing segment of flexible or rigid lightweight material. Fan according to claim 1, characterized that the wing blades by a lightweight Carrier structure is formed, which the wing segments supported.