Method For Controlling Fans And A Group Of Fans
Assigneeebm-papst Mulfingen GmbH & Co. KG
InventorAndreas Fessel
Life of this patent
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Abstract
A method for controlling a fan group in order to generate a predefined total volumetric flow. The group of fans has a plurality of individual fans operated in parallel. Each generates an individual volumetric flow. The group of fans is divided into at least a first and a second control group. Each group has at least one fan. The individual volumetric flow of at least one fan of the first control group is increased by adjusting into a range of optimum efficiency by a speed change. This maintains constant flow. The individual volumetric flow of at least one fan of the second control group is reduced accordingly by a rotational speed reduction. All the fans contribute to the total volume flow at all times and no fan of the second control group will be switched off at any time.
Claims18
1-17. (canceled)
A method for controlling a fan group in order to generate a predefined total volumetric flow, the group of fans comprising:
- a plurality of individual fans operated in parallel, each fan generating an individual volumetric flow, the group of fans is divided into at least a first and a second control group, each group comprising at least one fan, and
- the individual volumetric flow of the at least one fan of the first control group is increased by an adjustment into a range of optimum efficiency by a change in rotational speed, while in effect maintaining a constant overall volumetric flow, and
- the individual volumetric flow of the at least one fan of the second control group is reduced accordingly by a reduction in rotational speed, all the fans of the first and second control groups making a contribution to the overall volumetric flow at all times.
The method according to claim 1, wherein the at least one first control group is adjusted within its highest power consumption into its efficiency optimum, such that the energy balance of the overall system of the group of fans is optimized.
The fan group for generating a predefined total volumetric flow, the group of fans comprising:
- a plurality of individual fans operated in parallel, each fan generating an individual volumetric flow, the group of fans is divided into at least a first and a second control group, each group 1 comprising at least one fan;
- and
- the individual volumetric flow of the at least one fan of the first control group may be increased by adjusting into a range of optimum efficiency by a change in rotational speed, while in effect maintaining a constant overall volumetric flow;
- and
- the individual volumetric flow of the at least one fan of the second control group may be reduced accordingly by a reduction in rotational speed, the group of fans is designed such that all the fans of the first and second control groups are making a contribution to the overall volumetric flow at all times.
Dependencies are inferred from the claim text.