Air quantity testing method and device used for changeable air quantity terminal device

A technology of variable air volume terminal and test method, which is applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. quick effect

Inactive Publication Date: 2008-10-08
上海大智科技发展有限公司
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AI Technical Summary

Problems solved by technology

When installing the variable air volume terminal device, the on-site personnel use the Pitot tube to detect the ventilation rate of the variable air volume terminal device, and set the direct digital controller according to the detection result. However, the Pitot tube is in a dynamic detection state, and its detection value needs to be real-time calibration
In the existing technology, it is difficult for on-site personnel to accurately calibrate the detection value of Pitot tube

Method used

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  • Air quantity testing method and device used for changeable air quantity terminal device
  • Air quantity testing method and device used for changeable air quantity terminal device
  • Air quantity testing method and device used for changeable air quantity terminal device

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Embodiment Construction

[0028] Such as figure 1 As shown, the air volume testing method for the variable air volume terminal device of the present invention includes a process of using a Pitot tube 2 to measure the ventilation rate of the variable air volume terminal device 1, and the said variable air volume terminal device 1 is provided with a direct digital controller 3 , wherein, the process of using the Pitot tube 2 to measure the ventilation rate of the variable air volume terminal device 1 includes a measurement step and a calculation step, and in the measurement step, the Pitot tube 2 is arranged at the variable air volume terminal In the device 1, the measured air volume and the measured dynamic pressure in the variable air volume terminal device 1 are obtained through the Pitot tube 2, and the displayed air volume of the direct digital controller 3 is read, and the inlet area of ​​the variable air volume terminal device 1 is measured. In the calculation steps described above, the adjustment...

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Abstract

An airflow measurement method for a variable airflow terminal device, wherein the method comprises: disposing a pitometer in the variable airflow terminal device, obtaining actual airflow and actual dynamic pressure in the variable airflow terminal device via the pitometer, and reading airflow displayed on direct digital controller in the variable airflow terminal device in order to measure inlet area of the variable airflow terminal device, calculating to obtain debugging factor of the pitometer according to the actual airflow, actual dynamic pressure, displayed airflow and inlet area obtained in the measuring step, then obtaining ventilation rate of the variable airflow terminal device according to the debugging factor and the actual dynamic pressure. The device for realizing the measurement method is composed of a pitometer, the pitometer is connected with a digital signal collecting device, and the digital signal collecting device is connected with a calculating device via a signal link. The invention can obtain accurate ventilation of the variable airflow terminal device according to debugging factor of the pitometer with simple measuring procedure, suitable for on-site utilization in real time.

Description

technical field [0001] The invention relates to the ventilation technology, in particular to the control technology of the ventilation volume, in particular to an air volume testing method and device for a variable air volume terminal device. Background technique [0002] The variable air volume terminal device is provided with a direct digital controller (DDC), and the direct digital controller can adjust the ventilation parameters of the variable air volume terminal device. When installing the variable air volume terminal device, the on-site personnel use the Pitot tube to detect the ventilation rate of the variable air volume terminal device, and set the direct digital controller according to the detection result. However, the Pitot tube is in a dynamic detection state, and its detection value needs to be real-time calibration. In the prior art, it is difficult for on-site personnel to accurately calibrate the detection value of the Pitot tube. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/46
Inventor 霍小平
Owner 上海大智科技发展有限公司
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