First, the production of electric heating wire
1. First select a section of 0.6MM electric heating wire to straighten, and then put it on the electric drill. Select a 0.25MM heating wire, cross-fix it, and use an electric drill to wind the 0.25 mm heating wire to? 0.6MM heating wire, winding a certain length.
2. The next step is to take out the finished wire, pull out the 0.6MM heating wire, and gently pull out the 0.25 heating wire.
3. Select a 2.5MM winding rod, and select two strands to be wound in parallel. Make sure that the twin wires are aligned and start winding 8 times. The measured resistance is 1.34ω.
4. Then, start threading.
Second, the basic knowledge of heating wire
1, the heating wire should show appropriate resistivity to achieve the purpose of electrifying and heating. The resistivity is too large or too small, which requires short or long, thin or thick heating wires, making it difficult to manufacture and use large and small power electric heaters; The melting point is relatively high, and it cannot be melted when it is hot; At higher temperature, it has higher chemical stability, can't be oxidized quickly and has short service life.
2. Under the condition of constant voltage, with the increase of temperature, the resistance of the heating wire will increase and the power will decrease. When heat and heat dissipation are in balance, the temperature is fixed.
3. The power of the heating wire is determined by the material, thickness and length of the heating wire. If it is the same material, the longer and thinner the heating wire, the greater the resistance and the smaller the power.
4. The working temperature of the heating wire is determined in the design process of the heating product. For example, the design working temperature of electric blanket is only tens of degrees, and the power of electric heating wire is selected according to the area and heat dissipation of electric blanket. If the use conditions are changed during the use, such as folding the electric blanket and electrifying it, the electric blanket will not dissipate heat well, which will easily cause a fire.
Third, the advantages and disadvantages of heating wire
First of all, we should know that the heating wire reaches the red-hot state, which is related to the structure of the heating wire. Let's take down the hair dryer first and cut a heating wire. With 8V? 1A transformer, electric blanket heating wire or heating wire resistance should not be less than 8 ohms, otherwise the transformer is easy to burn. With 12V? For a 0.5A transformer, the resistance value of the heating wire should not be less than 12 ohm, otherwise the transformer will be easily burned out. If the heating wire reaches a red-hot state, the redder the better. Do you want to use 8V? 1A transformer with power ratio of 12V? The transformer of 0.5A is large. This can better test the advantages and disadvantages of the heating wire.
The production of electric heating wire is very simple, because it is good to prepare the winding material at a certain temperature, but we should pay attention to some basic knowledge. Each heating wire has a certain resistance and power. We need to find out how much power we need to make electric heating wires and what conditions are needed to make electric heating wires. Otherwise, the electric heating wire made by then does not meet the requirements of our electrical appliances, which will cause electrical damage or other accidents.
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