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Control method of hair straightener

A control method and hair straightener technology, which are applied in temperature control, non-electric variable control, control/regulation system, etc., can solve problems such as increasing cost, and achieve the effects of convenient debugging, fast calculation speed and simple circuit

Active Publication Date: 2009-07-15
深圳市英唐智能控制股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The MCU used in this control process must have its own AD conversion function, which increases the cost of the MCU

Method used

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  • Control method of hair straightener

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Embodiment Construction

[0011] figure 1 A circuit for implementing the method of the invention is shown.

[0012] Such as figure 1 As shown, the circuit includes a multi-point control unit MCU, a capacitor C 1 , standard resistance R 5 and negative coefficient thermistor NTC. The MCU adopts Elan's 78P153, the MCU does not have an AD converter, and the price is very low; the resistance value of the standard resistor R5 is R; the capacitor C 1 One end is grounded, and the other end is connected to the P62 port of the MCU; one end of the negative coefficient thermistor NTC is connected to the P64 port of the MCU, and the other end is connected to the P62 port of the MCU and the capacitor C 1 between; standard resistance R 5 One end is connected to the P65 port of the MCU, the other end is connected to the P62 port of the MCU and the capacitor C 1 Between; the thyristor SCR1 is connected in series with the heating element 10, and the thyristor SCR1 passes through the resistance R 7 Connected to th...

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Abstract

The present invention provides a control method of hair straightener, which comprises the following procedures: installing a negative temperature coefficient NTC thermistor at back of heater of hair straightener; charging a same capacitor respectively through the negative temperature coefficient NTC thermistor and a standard resistor R under a same charging voltage; obtaining the resistance of negative temperature coefficient NTC thermistor RNTC=R*T2 / T1 through the resistance of standard resistor R, a time T1 for fully charging the capacitor with the standard resistor R and a time T2 for fully charging the capacitor with the negative temperature coefficient NTC thermistor; and calculating the present temperature TNTC of negative temperature coefficient NTC thermistor according to the characteristic parameter of negative temperature coefficient NTC thermistor. According to the method of the invention, AD conversion adopts the form of capacitor charging / discharging. The MCU without AD conversion function can be used and the cost is low when the method of the invention is adopted. The advantage of quick calculating speed of MCU can be fully exerted. The circuit is simple and the debugging is convenient.

Description

【Technical field】 [0001] The invention relates to a control method of a hair straightener, in particular to a control method of the hair straightener which can simply realize the control of the heating temperature of the hair straightener. 【Background technique】 [0002] When the straightener is working, high temperature is generated by the heating element, and the hair in contact with the straightener is heated. The control principle of the temperature of the heating element is as follows: the mains power is converted into direct current through the rectification and filtering circuit, and supplied to the MCU with AD conversion. Compare to control whether the thyristor is turned on, so as to control the temperature of the heating element. The MCU then communicates with the LCD driver chip to display the temperature on the LCD. [0003] The MCU used in this control process must have its own AD conversion function, which increases the cost of the MCU. 【Content of inventio...

Claims

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Application Information

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IPC IPC(8): G05D23/24A45D1/04
Inventor 古远东陈培智
Owner 深圳市英唐智能控制股份有限公司
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