Xiaomi high voltage refrigerator lemon

This seems a fairly well designed product with quite a lot of deja-vu in the electronics. I've looked at a number of other fridge ozone units in the past with very similar circuitry.
I'd guess the reason the fan and high voltage module are on separate transistors is to allow fan over-run or cycling of the ozone to regulate the output.
The physical design and construction of this unit is stylish and fairly sensible. It's unusual that the ozone generating plate has the active area facing away from the fan, but I'd guess air turbulence makes up for that. It certainly smells strongly of ozone in use.
Aside from use in fridges and food cupboards, the unit is also good for small rooms and wardrobes for combatting musty smells.
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