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Hair straightener solution
Hair straighteners work by converting electrical energy into heat energy. Part of the heat energy is conducted to the hair at low temperature, and it is dissipated through air radiation, convection, etc., and the other part of the heat energy is absorbed by itself. Hair straighteners are also called electric splints, commonly known as splints, which heat the heating element MCH or PTC or heating wire of the hair straightener through electric current, and conduct it to the aluminum plate or ceramic plate to generate heat.
A hair straightener, by definition, is to straighten the hair, heat the hair through the heating element, soften it, and then cool it down to achieve the purpose of straightening the hair. Today's hair straighteners can both straighten and curl. In the past, hair straighteners were mainly used by professional barbers in hair salons. In recent years, hair straighteners have entered the Chinese household market and developed into an essential product for personal care, as popular as combs. Correspondingly, there is also a curling iron, which uses a heating roller to circulate heat, improve the protein structure of the hair to create bending, and protect the hair quality during the curling process.
1. The technical principle of the hair straightener solution
1. The heating principle of the hair straightener
Hair straighteners generally use heating elements to increase the temperature of the working surface, which causes the molecular structure between the keratin proteins of the hair to change and produce a new shape. The heating element generally adopts a positive temperature coefficient thermistor PTC (Positive Temperature Coefficient Resistance). PTC has unique electro-thermophysical properties: when the PTC element is heated by an AC voltage, the resistivity is very low below the Curie temperature, and when the resistivity exceeds the Curie temperature, the resistivity suddenly increases, causing the current to drop to a stable value. Temperature control, constant temperature function.
In recent years, heating wires have also been used in pursuit of heating speed and efficiency heating elements. After the heating element heats up, the heat is transferred to the working surface through heat conduction to complete the perm task.
The working surface of the hair straightener generally adopts a ceramic plate or an aluminum plate. The aluminum plate heats up quickly but damages the hair quality more than the ceramic plate.
2. How to reduce the damage of hair straightener to hair?
There are two factors that affect the perm effect and hair damage degree of the hair straightener: one is whether the heating method of the hair perm is gentle and uniform, which directly affects the perm effect and the degree of hair damage. Second, the accuracy of temperature control in the perm process is also an important factor affecting the quality of perm and hair damage. The hair straightener is in direct contact with wet hair during the perm process, and its quality is related to the personal safety of the user.
2. Types of hair straightener solutions
Hair straighteners can be divided into ceramic heating elements, PTC heating elements and MCH heating elements according to different heating elements.
1. Ceramic heating element
The advantage of the ceramic heating element is that it is environmentally friendly and the heating speed is fast. Generally, the surface temperature of the splint can reach 200 degrees in 30 seconds to 45 seconds. However, since the ceramic heating element is sintered at a high temperature above 1000 degrees, its temperature will quickly exceed 300 degrees after the circuit loses control, which will burn out the plastic material fixing the heating plate, causing the heating plate to fall off, and may come into contact with users and cause skin burns.
2. PTC heating element
PTC heating element is also called PTC heater, which is composed of PTC ceramic heating element and aluminum tube. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency. It is an electric heater with automatic constant temperature and energy saving. The outstanding feature lies in the safety performance. In any application, there will be no "redness" phenomenon on the surface of the electric heating tube heater, which will cause burns, fire and other safety hazards. PTC is also sintered at high temperature, but the maximum temperature of its surface can be controlled during sintering. According to the requirements of the manufacturer, the surface can be sintered to below 280 degrees, or any temperature the manufacturer wants, generally 230 degrees to 230 degrees. 280 degrees. But its disadvantage is that the temperature rises to 200 degrees slowly, generally in about one and a half minutes or two minutes. In addition, in use, it cannot be continuously maintained at a higher temperature like a ceramic heating element. Slightly less effective at straightening hair.
3. Temperature rise design of electric splint
The law of heat resistance of insulating materials shows that when the temperature rises to a certain temperature, the insulating material will age rapidly, shorten the service life of the product, cause a decrease in safety performance and burn the user. The standard stipulates that the temperature rise at the outer surface of the molding material in short-term contact cannot exceed 60K.
However, due to structural design flaws in the hair straightener, heat is easily gathered on the outer surface of the back of the working surface. In addition, the shell structure of most manufacturers of hair straighteners is small and compact, making it difficult to dissipate heat. In addition, the manufacturer has not adopted heat insulation treatment (adding Measures such as heat insulation cotton or adding heat insulation sheath) cause the temperature rise of the outer surface of the molding material that is in short-term contact far exceeds the regulations, and it is easy to cause burns to the user during normal work.
The temperature rise of the rotary connection sliding contact of the hair straightener is also easy to exceed the standard, because the contact area of the rotary connection contact is too small or the material resistance is too large, causing the temperature rise to exceed 65K. In recent years, hair straighteners tend to be miniaturized, and the temperature rise failure rate of mini hair irons has greatly increased due to their more compact structure.
The above are the details of the hair straightener solution introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have electronic function development needs for hair straighteners, curling irons, and curling irons, you can trust us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and material prices as soon as possible. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. Our development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty and hairdressing equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS solutions, the development of Bluetooth audio, the development of children's toys, and the development of electronic education products.
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