Induction Cooker (also known as induction cooker) - is the product of the modern kitchen revolution, is a fire-free cooking utensils that do not require open flame or conductive heating, completely different from other household kitchen utensils. Today, the decoration house Xiaobian tells you a few reasons why the induction cooker is not hot, and helps everyone solve the problem.
1. Is your pot double-layered, only a single-layer stainless steel pot, the induction cooker recognizes it, otherwise it won't start.
2. It may be that there is a fault in the induction cooker, or it may be improper operation or the circuit breaker is activated by the induction cooker under certain conditions. Users can try to start up without putting the pot, check to see if there is any alarm sound. If there is, it should be that the capacitor has failed; if there is no alarm, please see if the used pot meets the requirements. No problem with the pot should be the failure of the induction circuit oscillation circuit, which requires a professional maintenance point for inspection and maintenance.
3. External natural factor condition protection:
(1) Grid voltage protection: Protection occurs when the voltage is high or the voltage is lower than the operating voltage range of the induction cooker. The nature of protection is forced standby. And display the fault code (if there is a display function).
(2) Induction cooker internal overheat protection: The protection trigger temperature is mostly 90 to 95 degrees, and the release temperature is 60 to 70 degrees. The nature of the protection is a paused shutdown and a fault code is displayed. If the temperature reaches 110 degrees, the protection circuit is forced to shut down. (When overheating protection, it is easy to be mistaken for "intermittent heating" failure.)
(3) Surge protection: Surge is a kind of spike that is relatively harmful when the voltage in the power grid rises or falls instantaneously. Excessive surge is generally discharged by the varistor, only some of which are A small surge triggers the surge protection circuit action. The nature of protection is a short pause. If the grid is outdated and there is a bad contact, an untimely pause may occur. (This type of protection is generally not noticeable, or it is mistaken for the power of the induction cooker to become smaller.)
(4) Over-temperature protection of the pot: also known as "anti-dry protection", the trigger temperature is 280 to 300 degrees, the temperature is 70 to 80 degrees, and the protection property is forced shutdown.
4. Insulation furnace internal factors condition protection.
(1), temperature sensor open circuit, short circuit protection: This type of protection will force the induction cooker to be turned off, and the induction cooker will be turned off before the fault is eliminated, any key does not work, and the fault code is displayed.
(2) IGBT tube over-voltage protection: When the IGBT collector voltage rises and reaches the protection trigger condition for some reason, the over-voltage protection action forces the induction cooker to reduce the output power, and the IGBT collector voltage is then reduced. When such a protection circuit operates, "intermittent heating" and "output power reduction" may occur.
(3) IGBT over-current protection: Over-current protection forcibly reduces the output power or directly suspends the work. After a delay, it starts to enter the working state again. This type of protection action will result in "regular intermittent heating".
The fault phenomenon of the induction cooker can be roughly classified into the following types:
First, the induction cooker does not respond to power (no power).
The causes of such faults usually exist in the following circuit units: high voltage main circuit, low voltage power supply circuit and single chip circuit.
Second, the induction cooker can not be turned on.
In the event of such failures, the disadvantages caused by the use of the environment, such as grid voltage, ambient temperature, etc., should be excluded first.
When it is determined that there is a fault in the induction cooker, it is important to check the protection circuit. Pot temperature detection circuit, IGBT temperature detection circuit, grid voltage detection circuit, button circuit.
Third, the induction cooker can be turned on, there is an alarm signal, but not heated.
At the time of the test, the current of the whole machine is “zero†regardless of whether the pot is placed or not. When such a fault occurs, it indicates that the oscillation control part of the induction cooker has been stopped for some reason, and the fault point generally exists in the synchronous oscillation circuit, the IGBT drive circuit, the surge protection circuit, the IGBT enable control circuit, and the single chip circuit.
Fourth, the induction cooker can be turned on, but intermittent heating occurs.
During the test, it can be observed that after the whole machine current increases from a small value to a certain value, it suddenly changes back to the “zero†value, and then the current of the whole machine increases again, and so on. When such a fault occurs, it can be judged that most of the circuits of the induction cooker can work normally, but only some condition factors in the working process do not meet the requirements and are forced to stop. Therefore, the following circuits should be inspected: synchronous oscillator circuit, IGBT driver, IGBT C pole high voltage protection circuit, current detection circuit, PWM modulation circuit, and single chip circuit.
The above is the analysis of the reasons why the induction cooker is not hot for everyone. I hope you don't panic when facing this kind of problem. Be sure to analyze the cause and deal with it calmly. If you want to know more about related aspects, please log in to the decoration home decoration network and enter the home encyclopedia for enquiry!
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