Control method of ptc heating system and ptc heating system

Abstract

The invention discloses a control method of a PTC heating system, which includes the following steps: S1, when the PTC heating module is in the first temperature state, turn on the PTC transmission module to switch the PTC heating module between the reset area and the working area, At the same time, track the position of the PTC heating module through the PTC position detection module; S2, judge whether the position movement track of the PTC heating module detected by the PTC position detection module meets the preset conditions; S3, if not, turn off the PTC transmission module and control the PTC The heating module remains off; S4, if it is satisfied, turn off the PTC transmission module and turn on the PTC heating module. The control method can accurately judge whether the PTC position detection module and the PTC transmission module fail, so as to ensure that the PTC heating module does not malfunction, and improve the safety and reliability of the PTC heating system. The invention also discloses a PTC heating system.

Description

technical field [0001] The invention relates to the technical field of electric heating control, in particular to a control method of a PTC (Positive Temperature Coefficient, positive temperature coefficient) heating system and a PTC heating system. Background technique [0002] At present, there are many cooling fans and heating products with PTC heating devices. If the PTC heating device moves in an improper position during operation, it will directly affect the heating effect of the PTC heating device, and even cause a safety accident. [0003] In related technologies, such as figure 1 As shown, the OUT position detection sensor is set in the PTC working area and the IN position detection sensor is set in the PTC reset area respectively, and the opening or closing of the PTC heating device is controlled by detecting whether the PTC heating device is in the PTC working area or the PTC reset area. Among them, the control method of turning on the PTC heating device is as f...

AI Technical Summary

Problems solved by technology

[0005] 1. If the position detection sensor has been unable to detect a valid signal (for example, the PTC transmission device is faulty), the PTC transmission device will always start, and then emit mechanical noise, which will have a negative impact on the user's use;

[0006] 2. If there is a fault in the position detection sensor, no effective signal can be detected (for example: the line is disconnected, the position detection sensor is often disconnected), which also has the above disadvantages; and if the fault in the position detection sensor causes a short circuit in the line, the controller will Mistakenly believe that the PTC heating device is already in the PTC work area, and turn on the heating immediately, but the position of the PTC heating device cannot be determined at this time. If it is not in the PTC work area, it is likely to cause a fire accident;

[0007] 3. During the heating process of the PTC heating device, due to mechanical failure, the PTC heating device ran away from the PTC working area, but the controller did not close the PTC heating device in time, which may also cause a fire

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