Automatic temperature control device

Abstract

The invention discloses an automatic temperature control device, which comprises a temperature detection circuit and a temperature control circuit, wherein the temperature detection circuit is composed of a temperature sensor RT, three-terminal precise voltage regulators IC1 and IC2, potentiometers RP1, RP2, and RP5, an ammeter PA, resistors R3 to R6 and a temperature measurement setting selection switch S; and the temperature control circuit is composed of three-terminal precise voltage regulators IC3 and IC4, a transistor V, a thyristor VT, zener diodes VS1 and VS2, a relay K, a diode VD, light-emitting diodes VL1 and VL2, resistors R1, R2, R7 to R10, a temperature upper limit control potentiometer RP3 and a temperature lower limit control potentiometer RP4. The temperature control device of the invention is wide in temperature control range, accurate in control, low in energy consumption and low in manufacturing cost, an electric heater is automatically closed when the monitored temperature reaches the upper set temperature limit value, and when the monitored temperature reaches the lower set temperature limit value, the working power supply of the electric heater is automatically connected.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to an automatic temperature control device. Background technique [0002] At present, most of the poultry house environment controllers used in the breeding industry are 8-bit single-chip microcomputers. These products have simple functions, limited information collection, inconvenient expansion, poor networking functions, and no feedback on the actual operating status of the equipment. Once the equipment fails (such as motor overcurrent failure), the breeder cannot immediately know and take timely measures. There are risks to the poultry. For this reason, the breeder needs to inspect from time to time, which not only disturbs the flock, but also increases the labor intensity of the breeder. Although traditional environmental control can realize ventilation and temperature adjustment according to the current temperature and then issue control commands, it cann...

AI Technical Summary

Problems solved by technology

Its existing problems: In order to realize the alarm, all the equipment used in the alarm system have added alarm equipment such as intermediate relays and alarm indicators, which increases the cost and complexity of the circuit

Its existing problems: the adjustment content is single, it can only be the ventilation volume in the poultry house, the accuracy of temperature control and detection is not high, and the control method is not intuitive

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