| 摘要 |
The present invention relates to a compact fan, comprising a fan wheel, in particular a radial fan wheel (1), which is fastened on a rotor of an external rotor motor (82). The fan wheel (1) is supported between a front plate (8) having an air inlet opening (9), which is central, and a motor mount (11). The front plate (8) and the motor mount (11) are connected to one another via multiple spacers (12), which are disposed around the circumference. The front plate (8) and the motor mount (11) are formed as plastic or metal spray parts. The spacers (12) are formed as plastic or metal parts entirely or partially in one piece to the front plate (8) and/or the motor mount (11). |
| 主权项 |
1. A compact fan, comprising a centrifugal fan impeller (1), which is fixed on a rotor of an external rotor motor (2) surrounding a stator, and which has a direction of rotation and is supported between a front plate (8) having a central air inlet opening (9), and a motor mount (11), and the front plate (8) and the motor mount (11) are connected together only by multiple, circumferentially arranged identical spacers (12), each of the spacers (12) having a streamlined, aerodynamic vane profile, the front plate (8) and the motor mount (11) are formed as injection molded plastic or metal parts, and the spacers (12) are formed as injection molded plastic or metal parts, each of the spacers (12) being divided into two parts (38, 39), a first part (39) of the two parts (38, 39) being integrally connected to the front plate (8) and a second part (38) of the two parts (38, 39) being integrally connected to the motor mount (11), the spacers (12) having a distance from each other defining a width of an unobstructed air outlet gap (13) and having a length defining a height of the unobstructed outlet gap, the stator (16) having a stator flange (16) fixed to the motor mount (11),
wherein each of the first parts (39) interlocks with one of the second parts (38) at a butt joint, wherein the streamlined aerodynamic vane profile of the spacers (12) has a longitudinal axis (X) extending tangentially on a circular circumferential line of the centrifugal fan impeller (1), and wherein the streamlined, aerodynamic vane profile has two lateral faces opposite to one another across the direction of the longitudinal axis (X), a rounded front side opposed to the direction of rotation of the centrifugal fan impeller (1) the rounded front side adjoining each of the two lateral faces, and an angled rear side in the direction of rotation of the impeller, the angled rear side formed by the two lateral faces adjoining each other at the rear side, and the longitudinal axis extending from the rounded front side to the angled rear side. |
