Novel intelligent ventilating frequency-conversion controller

Abstract

A new-type intelligent ventilating frequency-conversion controller controls an air blower through a frequency converter to control X ventilating rooms, and comprises a dry contact input circuit of the ventilating rooms, a ST single chip microcomputer and the following devices connected with the ST single chip microcomputer: a relay control device, an output circuit, a photoelectrical isolation circuit and an RS485 circuit, a ferroelectric storage, a clock circuit, a LCD (Liquid Crystal Display) and an input key. The controller of the invention has the advantages that: the controller completely replaces traditional PLC (Programmable logic Controller) under the condition of ensuring rational design of a circuit diagram, reliable selection of devices and exquisite manufacturing process; the hardwire cost is greatly reduced in contrast to the traditional PLC; plenty of software functions can be realized to reach the purposes of being fully energy saving, convenient for operation and suitable for the situation that each air passage control has different quantity of rooms, an air-passage control system can be randomly refitted according to the cost and actual situation. The onsite programming of a user is not needed and great convenience is brought to later modification and adjustment of the ventilating rooms.

Description

Technical field: [0001] The invention relates to a new type of intelligent ventilation frequency conversion controller. Background technique: [0002] In the chemistry and material laboratories of universities, colleges and research institutes, large amounts of toxic substances and gases are present or generated during the experiment. If the poisonous gas exceeds the standard, it will be harmful to the human body. Therefore, many laboratories need to set up ventilation facilities. In traditional ventilation facilities, the method of controlling the fan is to use the opening of the damper to adjust the air volume. In this case, the motor runs at a constant speed and constant output power (maximum output power). A large amount of energy is consumed in the damper The goal of energy saving cannot be achieved. [0003] At present, the ventilation control system generally uses PLC to control the inverter for ventilation control in order to achieve energy saving. Specifically: the fro...

AI Technical Summary

Problems solved by technology

[0004] This scheme of using PLC as the core of the controller can basically achieve energy saving. The disadvantage is that the PLC control system of each group of main air duct fans needs to be programmed separately, which is very troublesome to operate.

If you want to add other auxiliary functions, you need to add corresponding hardware, and the software programming is correspondingly complicated, and the requirements for software programmers are also high, so the increase in the cost of software and hardware leads to a corresponding increase in engineering costs

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