Temperature and humidity controller

Abstract

A temperature and humidity controller comprises an MCU (microprogrammed control unit), a power module, a temperature and humidity sensor module, an alarm module, a keyboard input module, a liquid crystal display module, a heater control module, a heater, a fan control module and a fan, wherein the power module, the temperature and humidity sensor module, the alarm module, the keyboard input module and the liquid crystal display module are connected onto the MCU; the heater control module is connected with the MCU and the heater; the fan control module is connected with the MCU and the fan.

Description

technical field [0001] The invention relates to a temperature controller, in particular to a humidity controller used in switch cabinets, central cabinets, box-type substations and other equipment in the power system. Background technique [0002] In order to ensure the normal and reliable operation of high-voltage power equipment such as switch cabinets and central cabinets, there are high requirements for anti-condensation inside them. At present, in order to prevent condensation inside the equipment, one or two heaters will be installed to use the heat generated during work to increase the temperature and prevent condensation. Due to the high power consumption of the heater, in consideration of energy saving, the heater It is best to work only when needed, and there are many ways to control the heater. The commonly used method is to use a resistive condensation sheet as a sensor, and use the inflection point of the parameter curve of this condensation sheet to realize th...

AI Technical Summary

Problems solved by technology

The commonly used method is to use a resistive condensation sheet as a sensor, and use the inflection point of the parameter curve of this condensation sheet to realize the purpose of controlling the heater to start. Although this method has a simple circuit, its accuracy is very poor, and condensation has often occurred. However, the controller has not started the heater, and the setting of the starting control point cannot be changed. Due to the vast territory of our country and the different climates, the temperature in each region

The temperature difference is very large, so the control requirements are also different, and this kind of controller cannot meet the better use requirements.

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