Intelligent high-low temperature test box temperature control system

Abstract

An intelligent high-low temperature test box temperature control system includes a temperature sensor mounted in the test box working area, the output terminal of the temperature sensor is connected to the input terminal of PLC, the refrigerating output terminal of the PLC controls a refrigeration system, and the heating output terminal of the PLC controls a heater, wherein, the heater and the refrigeration evaporator in the refrigeration system are mounted in a temperature adjustment area of the test box. The inventive intelligent high-low temperature test box temperature control system has significant effects of few system loop, simple structure, reasonable use of resources, low energy consumption, fast adjustment time, simple operation, and low machine utilization.

Description

technical field [0001] The invention belongs to the control technology of an environmental test device, in particular to an intelligent high and low temperature test box temperature control system in a high and low temperature damp heat test box. Background technique [0002] At present, most of the adjustment technologies of environmental test devices are to adjust the test temperature of the studio through cold and heat confrontation, and the main actuators in the system are heaters and humidifiers. The refrigeration compressor unit cannot be precisely controlled steplessly. For example: at a constant low temperature, high-power cooling is required at the same time, and a certain power heating is required at the same time. Often, the working condition will fluctuate continuously within a certain range. This is actually a dynamic balance, and such a balance is difficult to achieve in a short period of time. ideal state within time. Another example: when doing a damp heat ...

AI Technical Summary

Problems solved by technology

The refrigeration compressor unit cannot be precisely controlled steplessly

For example: at a constant low temperature, high-power cooling is required at the same time, and a certain power heating is required at the same time. Often, the working condition will fluctuate continuously within a certain range. This is actually a dynamic balance, and such a balance is difficult to achieve in a short period of time. reach the ideal state in time

Another example: when doing a damp heat test, high-temperature steam enters the working room to increase the humidity, but at the same time it leads to a temperature rise, so the refrigeration dehumidifier must work at the same time to reduce the temperature, which is also a dynamic balance in the confrontation, so that the electric energy and water volume consumption is relatively large

The result of this adjustment method is that not only the debugging time is long, but also the operation difficulty and unreliability factors are increased, and the long-term heavy load operation of the equipment causes the accessories to deteriorate rapidly, affecting its service life. Due to the high energy consumption, a large amount of its steam is discharged to the surrounding environment , conflicts with the environmental concept of advocating energy conservation and emission reduction, making this type of test equipment unable to meet the needs of the majority of consumers and energy conservation and environmental protection

[0003]Disadvantages of traditional temperature control: dynamic balance temperature control technology consumes a lot of power and water, takes a long time to adjust, increases the difficulty of operation and unreliable factors, and the equipment Long-term high-load operation causes rapid deterioration of accessories and affects their service life

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