Multi-ventilated-case cooperating exhaust control system

A control system and fume hood technology, applied in the direction of smoke removal, cleaning methods and appliances, chemical instruments and methods, etc., can solve the problems of low control accuracy and difficulty in stabilizing the wind speed of the fume hood surface, so as to achieve reliable control and improve wind speed control Accuracy, intelligent saving effect

Active Publication Date: 2010-12-15
广东科艺普实验室设备研制有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme has indeed made some progress compared with the previous scheme, but it directly determines the fan speed according to the number of opened fume hoods or suction hoods, which not only has low control accuracy but also makes it difficult to stabilize the surface of each fume hood. wind speed

Method used

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  • Multi-ventilated-case cooperating exhaust control system
  • Multi-ventilated-case cooperating exhaust control system
  • Multi-ventilated-case cooperating exhaust control system

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Embodiment Construction

[0019] The technical solution for applying the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 and figure 2 As shown, a ventilation control system of a fume hood includes more than 2 fume hoods 1, a main ventilation duct 2 and an exhaust fan 3 arranged on the main ventilation duct 2; secondly, on the main ventilation duct 2 and located A first differential pressure sensor 21 is arranged in front of the exhaust fan 3 . The first differential pressure sensor 21 mainly senses and detects the wind pressure in the main ventilation duct 2 . The exhaust fan 3 works under the drag of the frequency converter 4 . The installation method of the first differential pressure sensor 21 can be adaptively adjusted according to its structure.

[0021] Described fume hood 1 comprises cabinet body, and the front of described cabinet body is provided with cabinet door 11, and test bench is provided with in th...

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Abstract

The invention relates to a multi-ventilated-case cooperating exhaust control system which comprises an exhaust fan and more than two ventilated cases, wherein the exhaust fan is arranged on a main ventilation pipeline, and the more than two ventilated cases are communicated with the main ventilation pipeline. The invention is characterized in that a first differential pressure sensor is arranged in front of an inlet of the exhaust fan, a wind pressure signal in the main ventilation pipeline is transferred to a first signal modulator by the first differential pressure sensor, a modulation signal is transferred to a frequency changer by the first signal modulator, and the exhaust fan is dragged by the frequency changer. The invention not only can realize the control for the gas speed in the pipeline and the exhaust flow speed of the ventilated cases, but also has the advantage of reliable and accurate control and saves the energy consumption of the fan through a method for detecting the air pressure in the ventilation pipeline and by automatically controlling the rotating speed of the fan after signal modulation. The invention can be used in a multi-ventilated-case cooperating laboratory exhaust system.

Description

technical field [0001] The invention relates to an exhaust air control system of a fume hood, in particular to an air exhaust control system in which a plurality of fume hoods operate in parallel. Background technique [0002] In laboratories and other occasions, it is necessary to ensure that the temperature, air pressure, wind speed and other parameters of the indoor or test operating platform are stable, and the test exhaust gas and waste heat can be removed in time. For this reason, the fume hood is a must-installed device. The fume hood is a relatively closed cabinet with a certain cavity space, a movable cabinet door is arranged in front of the cabinet, and an operating platform is arranged in the cabinet, so that the experimenter can use the platform after opening the cabinet door Engaged in various physical and chemical experiments. However, in the course of the experiment, the general test requires the test environment to be constant pressure, constant temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B15/00
Inventor 李保标陈绍枢
Owner 广东科艺普实验室设备研制有限公司
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