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Fan

A fan and volume flow technology, applied in the field of axial flow fans and backward radial flow fans, can solve the problems of air volume flow measurement or determination, inaccurate time and time, and achieve the effect of simplified installation and simple installation.

Pending Publication Date: 2022-01-11
ZIEHL ABEGG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement or determination of the air volume flow is known from practice to be time-consuming and inaccurate

Method used

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Embodiment Construction

[0027] figure 1 An axial plan view of an exemplary embodiment of a blower 1 with a volume flow measuring wheel 2 is shown viewed from the inflow side. The volume flow measuring wheel 2 extends almost over the entire radial area of ​​the flow section of the inlet nozzle 5 , approximately at its narrowest point. The volume flow measuring wheel 2 essentially consists of a hub 7 and blades 6 connected to the hub 7 . In this embodiment, there are three vanes 6 for minimizing disturbance of the inflow of the volume flow wheel 2 into the impeller 3 or its vanes 9 . Embodiments with two to thirteen blades 6 are conceivable.

[0028] Volume flow measuring wheel 2 is supported by bearing 19 (see image 3) is rotatably mounted on the shaft 13. In this embodiment, the rotating shaft 13 rotates at the rotational speed of the rotor 11 of the motor 4 or the rotational speed of the impeller 3 of the fan 1 . The shaft 13 is the extended shaft of the motor 4 . Due to the bearing arrangeme...

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Abstract

The invention relates to a fan, particularly an axial-flow fan and preferably a backward-curved centrifugal fan comprising an impeller wheel provided with wings, an electric motor for rotating the impeller wheel, and a device for determining the air flow when the impeller wheel is rotating. The device for determining the air flow comprises a volumetric flow measuring wheel which is positioned in the air flow in front of the impeller wheel on the inflow side. The volumetric air flow is calculated or derived from the rotational speed of the volumetric flow measuring wheel.

Description

technical field [0001] The invention relates to a fan, in particular an axial fan and preferably a backward curved radial fan. For the basic design of the fan, reference is made to DE 10 2017 209 291 A1 only by way of example. Background technique [0002] Such fans have a bladed impeller driven by an electric motor. In particular for controlling such fans, the volume flow must be determined while the fan is operating. Until now, the determination of the volumetric flow has only been carried out on the basis of electrical data from the electric motor, in particular electrical data of the sucked-in flow. However, the volumetric flow rate cannot be calculated unambiguously due to the uncertainty of the torque characteristics. Furthermore, it is known from practice that the volume flow is calculated by means of a differential pressure measurement. This approach is time consuming and, for many applications, involves too much error. [0003] Especially with forward curved ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00G01F1/115
CPCF04D27/001G01F1/115G01F1/103G01F1/666F05D2270/3061F04D17/16F04D27/00G01F1/80G01F1/10G01F1/8454G01F1/11G01F1/90G01F1/12G01F1/82F04D29/281G01F1/125F04D29/4213F04D19/002F24F2110/30F04D29/4226F04D29/526F04D27/004F04D25/0666
Inventor F·勒歇尔A·赫罗尔德
Owner ZIEHL ABEGG AG