Negative temperature coefficient (NTC) single temperature control circuit and temperature control method thereof

Abstract

The invention discloses a negative temperature coefficient (NTC) single temperature control circuit and a temperature control method thereof. The NTC single temperature control circuit comprises a heating element and a controller, wherein the heating element comprises an induction line, an NTC layer and a hot wire, the controller comprises fuses, a resistance capacitance step-down circuit, an indicator light circuit, a power source voltage detection circuit, a synchronous signal circuit, a first voltage detection circuit, a load detection circuit, protective controlled silicon, operating controlled silicon, an operating controlled silicon short-circuit detection circuit and a central processing unit, wherein the operating controlled silicon is used for controlling the hot wire, and the first voltage detection circuit is used for receiving the temperature change of the NTC layer and detecting whether short circuit happens on the induction line or not at the same time. According to the NTC single temperature control circuit and the temperature control method thereof, the operating controlled silicon is matched with the protective controlled silicon, after the operating controlled silicon is out of control, the protective controlled silicon can cut off a power source in time, detects the working conditions of the NTC hot wire and the line of induction synchronously, and fault detection capability is stronger.

Description

technical field [0001] The invention relates to the technical field of temperature control, in particular to an NTC single temperature control circuit and a temperature control method thereof. Background technique [0002] The main principle of the temperature control circuit in the prior art is the on-off of the temperature control switch. The principle of this temperature control circuit is simple, but it has obvious deficiencies in fault detection, and the temperature control switch is often in the on-off state, so it is inevitable Out of control, and the temperature control circuit in the prior art does not pay attention to the detection of switch out of control, causing the product to be heated until the heating wire burns out, causing unnecessary casualties and property losses. Contents of the invention [0003] (1) Technical problems to be solved [0004] The purpose of the present invention is to overcome the disadvantage that the above temperature control circuit...

AI Technical Summary

Problems solved by technology

[0002] The main principle of the temperature control circuit in the prior art is the on-off of the temperature control switch. The principle of this temperature control circuit is simple, but it has obvious deficiencies in fault detection, and the temperature control switch is often in the on-off state, so it is inevitable Out of control, and the temperature control circuit in the prior art does not pay attention to the detection of switch out of control, causing the product to be heated until the heating wire burns out, causing unnecessary casualties and property losses

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