Blower apparatus having an electric drive motor

摘要

The invention relates to a blower apparatus (1) having a blower wheel (4) for generating a blower air flow (50). The blower wheel (4) is arranged in a housing (2), wherein the blower wheel is driven by an electric drive motor (8). A blower tube (6) via which the generated blower air flow (50) is guided connects at an outlet (5). A control unit (17) is provided for controlling the rotational speed of the electric drive motor. For a quick reduction of the blower air flow (50), it is provided that the control unit (17) supports the deceleration of the drive motor (8) through a braking current (I).

主权项

1. A blower apparatus comprising:
a housing; a blower wheel arranged in said housing and configured to generate a blower air flow; an outlet for said blower air flow; a blower tube which connects to said outlet; said blower tube being configured for guiding said blower air flow; an electric drive motor arranged in said housing and configured to drive said blower wheel; a voltage source; a control unit configured to control the rotational speed (n) of said drive motor; said drive motor being connected to said voltage source via said control unit; said control unit being configured to support a deceleration of said drive motor via a braking current (I) in order to reduce said blower air flow; and, said control unit being configured to set said braking current (I) in such a manner that on the basis of a braking time (B), a braking procedure of an operating rotational speed (n) to less than 10% of the operating rotational speed follows a rotational speed course of said drive motor which follows a characteristic line as a function of time (t) which has an essentially constant negative slope over more than 60% of said braking time (B).