Reversierventilator

Abstract

that a wind speed sensor (2) is located in the airflow of the reversing fan,

Description

The present invention improves the symmetry of the volume flows of the supply and exhaust air under the influence of external wind. A wind speed sensor (anemometer) on the fan determines the volume flow in both directions of rotation, and the electronics in the reversing fan adjust the rotational speed according to the prevailing wind pressure or suction. In strong winds, the fan propeller may reverse prematurely before the actual reversal of the volume flow occurs. This control mechanism ensures that the degree of heat recovery is maintained even under wind influence. A turbulence-reducing air guide structure between the propeller blade and the wind speed sensor, consisting of one or more honeycomb structures or one or more hollow cylinders, improves the determination of air velocity in turbulent flows that occur in strong winds. State of the art The companies ebm-papst and inVENTer GmbH manufacture reversible fans with DC drives. In both cases, the axial fans do not have active volume flow control in response to external wind influences. Wind pressure increases the volume flow during the supply air phase and reduces it during the exhaust air phase. Wind suction has the opposite effect. As a result, the degree of heat recovery in the building is reduced by wind influences. With central ventilation systems that have significantly more powerful fans (higher power consumption) and steeper pressure-volume flow curves, the influence of wind is less pronounced. Reversible fan literature DE 2903925 A1DE 202011004598DE 3327685 A1DE 29801917 U1DE 69202613 T2DE 69202613 T2 QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature DE 2903925 A1

[0002] DE 202011004598

[0002] DE 3327685 A1

[0002] DE 29801917 U1

[0002] DE 69202613 T2

[0002]

Claims

that a wind speed sensor (2) is located in the airflow of the reversing fan, that the volume flow of the reversing fan is constantly controlled in both directions of rotation by means of a sensor and electronics (3), whereby a premature reversal of the direction of rotation supports the control of the volume flow in the event of wind influence, that an air guide structure (4) is arranged between the fan blade and the wind speed sensor.

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