The difference between the constant temperature electric blanket and the stepless temperature regulation electric blanket
1. Let’s talk about the ordinary electric blanket first: there are high, low and two gears, which is the high-grade power-on voltage 220v, half of 220V (half wave) in low gear to heat.
Advantages: low price, simple and durable circuit.
Disadvantages: electricity consumption, the temperature cannot be adjusted freely, the heating is slow, and the temperature will change greatly with the fluctuation of the mains voltage and the temperature fluctuation, cold before going to bed, hot in the middle of the night.
2. Stepless temperature regulation: use a potentiometer, a thyristor plus a few resistors and a capacitor. . A voltage regulator circuit composed of less than 10 electronic components (10 yuan can be assembled by yourself). Rotating the potentiometer can adjust the power supply voltage of the electric blanket, thereby changing the temperature of the electric blanket.
Advantages: It can adjust the temperature and sleepiness in a wide range, and the price is slightly higher than ordinary electric blankets (about 20 yuan).
Disadvantages: basically the same as above, that is, the temperature adjustment range can be greatly expanded.
3. Constant temperature electric blanket: It is a temperature control circuit composed of a heating wire wound in parallel with a temperature sensing wire + an arithmetic integrated circuit + a temperature regulating potentiometer. The temperature of the electric blanket can be preset by adjusting the potentiometer. Remember not to adjust the supply voltage, but to adjust the temperature control point of the circuit. It is to automatically change the power-on and power-off time of the electric blanket to control its required temperature.
Advantages: power saving, fast heating, temperature can be adjusted at will, will not change due to changes in voltage and temperature, adjust to the temperature you need, automatically power off when the set value is reached, and automatically when the temperature drops Power on keeps the temperature constant forever.
Disadvantages: high price (about twice the price of ordinary electric blankets), relatively complex circuit, and easy to fail.
Why is the thermostatic electric blanket more energy-efficient than the above two? The other two types change the temperature by changing the power supply voltage. They control the temperature by changing the power-on and power-off time, and the thermal efficiency is much higher than the above. For example: a hot-fast in-line water heater with a voltage of 220v=1000W to boil water, the water will boil in more than 10 minutes, and the power of 110V will also have 500W, and the water will not boil for 30 minutes. If you don’t believe me, try it.
4. Plumbing electric blanket: It is heated by constant temperature hot water flowing in the electric blanket, not only the temperature can be adjusted drowsily, but also the temperature is constant and not affected by other reasons, no radiation, the best effect, the price Also the highest.
