Measuring method for output frequency of frequency converter of variable frequency fan under different working conditions

Abstract

The invention discloses a measuring method for output frequency of a frequency converter of a variable frequency fan under different working conditions. The measuring method comprises the steps of opening all induced air ports of the variable frequency fan in an operating state, detecting and recording gas flows of the induced air ports, power and rotating speed of the variable frequency fan and the output frequency of the frequency converter respectively with detecting instruments, closing the induced air ports of the variable frequency fan respectively in sequence till all the induced air ports are closed, adjusting the output frequency of the frequency converter to the extent that the gas flow of the opened induced air port is equal to the gas flow of the induced air port when all the induced air ports are opened, recording the output frequency of the frequency converter and the power and rotating speed of the variable frequency fan, and therefore obtaining measured values of the output frequency of the frequency converter of the variable frequency fan under the different working conditions after the induced air ports are closed in sequence. The method overcomes the defect that the output frequency of the frequency converter of the traditional variable frequency fan is set; the operating power of the variable frequency fan can meet requirements on extracting toxic and harmful gas from the induced air ports under the different working conditions, and the maximum energy-saving effect is achieved.

Description

technical field [0001] The invention relates to a method for measuring the output frequency of a frequency converter of a frequency conversion fan under different working conditions. Background technique [0002] Frequency conversion fans are widely used in the exhaust or air supply process of various equipment or production sites. For example, in the electroplating industry, the electroplating process will produce toxic and harmful gases that endanger the workers. Usually, the electroplating tank will have an air inlet to extract toxic and harmful gases. , and then the frequency conversion fan connects the air inlets of multiple electroplating tanks through pipelines to centrally extract the toxic and harmful gases of multiple electroplating tanks, and then uniformly treat and discharge them. Generally, the capacity of the frequency conversion fan is determined according to the induced air volume required by all electroplating tanks on the production site, but due to the ir...

AI Technical Summary

Problems solved by technology

However, due to the large difference between the frequency conversion fan on the production site and the pipes connected to the air inlets of each electroplating tank, the operating power of the frequency conversion fan calculated through theoretical calculations does not necessarily meet the air volume / wind speed required by the air inlets of each electroplating tank, resulting in toxic and harmful gases in some air inlets Therefore, if the output frequency of the variable frequency fan inverter is set too low, it will pose a threat to the safety environment of the production site, otherwise, the power saving will not be obvious

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