First, the characteristics of the beautiful induction cooker
1, bottom temperature control features: Generally, a heat-sensitive element is installed at the bottom of the furnace plate to control and measure the bottom temperature of the pot, and it can be adjusted when it is overheated, saving electricity and being safe.
2. Self-protection characteristics: It is impossible to have a large margin when working in a high-voltage and high-power state, so if the power supply voltage is too high, the current increases and the temperature rise in the machine is too high during the working process, the protection devices such as high voltage, overcurrent and overtemperature will be ensured to be normal.
Second, the circuit diagram of Midea induction cooker
The induction cooker adopts the heating principle of magnetic field induced current. The control circuit converts the DC voltage into a high-frequency voltage of 20-40KHz, and forms a frequency alternating magnetic field through a magnetic induction coil. Vortex makes molecules collide with each other to heat food, thus achieving the purpose of cooking.
Third, Midea's induction cooker heats intermittently.
1, Midea's induction cooker was burnt out by electricity.
Check whether the main circuit is seriously short-circuited with the short-circuit gear of multimeter. Leakage phenomenon. For example, whether the bridge stack and IGBT are short-circuited, whether the capacitors of C 1 3uf/275v and C65uf/275v are short-circuited or seriously leaked, and replace the faulty components.
2, put the pot, stop heating every 3 seconds 1 second, always start and stop work repeatedly.
(1) According to the maintenance experience of various types of machines, it is usually caused by the overcurrent of the main circuit or the overvoltage protection of the C pole of the power tube.
(2) Measure the power drop in the main circuit with R- 1R ohmmeter. There is no leakage in the whole bridge. The potentiometer VR 1 in the current measurement and detection circuit found no problem.
(3) Measure the voltage of each power supply in standby state? 5V。 18V。 300V？ Basically normal. Go down and pick up from 300V? .2w. Are the output voltages of two groups of large resistors between 1.5V-2V normal? .
3 measure the voltage of each power supply in standby state? The voltage of each pin of LM339 is also normal.
(4) Measure the resistance when the power supply is not connected. Push the triode and no problem is found. Then measure the diode and voltage regulator. Found 18 V? The variable value problem of heating Zener diode was found.
(5) Find the same 18V regulator and put it on the tester to work normally? .
Fourth, Midea's induction cooker maintenance point
Midea is a national chain home appliance brand, so Midea will have corresponding maintenance service points all over the country. There are thousands of maintenance service shops authorized by the general manager in China, which are distributed in major cities across the country. If you want to maintain a beautiful induction cooker, you can go to the local maintenance point. Can you call Midea's service hotline at 400-889-93 15? 400-889-93 16 ? Consult address information. You can also call the local telephone for consultation:
Beijing: Beijing home appliance maintenance service? 0 10-86 187075
Chengdu: chenghua district Zhongzhi Household Electrical Maintenance Department? 028-83288480
Shenzhen: Mei Jia Electrical Service Department, Xin 'an, Baoan District, Shenzhen? 0755-296 10005
Midea brand induction cooker has good after-sales maintenance service. If the Midea induction cooker you bought has intermittent heating failure, I hope the above solutions will help you.