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Anonymous users2024-01-24It is estimated that it is the winding inductance of the exhaust fan motor, the high-voltage self-inductive electromotive force generated at the moment of the exhaust fan start-up (the principle is introduced in junior high school physics), and the distributed capacitance between the wall switch traces (the capacitance is the path to the AC) is connected into the LED circuit disconnected by the switch, which instantly forms a larger leakage current than that of the non-inductive electrical switch, which causes the LED to drive and start the LED to light up.
On the one hand, this high-voltage self-induced electromotive force only exists at the moment of motor start-up, and then quickly decreases to less than the mains voltage. On the other hand, LED drivers usually have an overvoltage protection circuit, and the high voltage triggers the action of the protection circuit and turns off the driver.
Therefore, the LED light should have lost this abnormal power supply and turned off before reaching its normal brightness, and the outside it only looked like it was related to turning on the exhaust fan and flashed quickly.
In fact, the moment the exhaust fan is started, it should also have an impact on the LED light that is on, and if the driver has an overvoltage protection circuit, it will be turned off and then normal; If the driver does not have an overvoltage protection circuit or does not meet the design requirements, the LED brightness will suddenly become brighter and then normal (this situation will harm the LED).
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Anonymous users2024-01-23It is the induction electricity on the line, the problem is not big, if you want to solve it, you can add the zero line of the LED to open and control. (Tao Shop: Sensen LED Lighting).
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Anonymous users2024-01-22I'm having the same thing as you, have you solved this problem?
Disassemble the switch to connect the light and see how many wires there are, if there are only two, it means that the wire of the exhaust fan and the wire of the lamp are connected together. There is no other way but to re-run the line from the line pipe. If there are four wires, determine which two are connected to the fan, and then change them to the other switch.
Double-open and dual-control, each controlling its own.
This is the reason why the exhaust fan and the bathroom light in your home are connected in series, and the voltage required for the motor of the exhaust fan is large when it starts, and the voltage required will be less after starting, and the light will flash a little.
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Installation method: 1. The exhaust fan installed on the aluminum gusset ceiling is equipped with metal fasteners matching the ceiling keel, which can be installed directly; 2. Installed on the outer wall of the bathroom, the hole should be opened in the wall first, and the hole diameter should be determined according to the size of the exhaust fan. 3. Installed on the wall of the exhaust pipe reserved in the bathroom, it needs to be equipped with a check valve to prevent odor crossing, and it is also necessary to punch holes with an impact drill and fix the expansion screws.