Well it's obvious you don't know anything about electronics... I am nice today so here's your free lesson. The way these coolboxes work is through a Peltier element. When passing 12v through it you will get a chemical reaction that will create one verry cool side and one verry hot side. When reversing the polarity the cool side becomes hot and the hot gets cool. The switch got 3 modes: off, normal polarity and reversed polarity (cold or hot). The fan will run constant when plugged in to 12v source, its not temperature RPM controlled so the noicelevel will be the same regardless of the actual temperature generated. The maximum cooling capacity of this kind of elements its about 15 celcius below room temperature and around 65 celcius warm.
Hello. Great videos. Watching your videos I can quench my desire to teardown all my appliances to inquire how they work and not get my girlfriend angry in the process. Now, regarding the video thermoelectric coolers usually have a peltier element. Peltier elements have a cold and a hot side. When powered they will extract heat from their cold side and transfer it to their hot side by means of the peltier effect. As the cold side cools and the hot side gets hotter their efficiency plummets thus limiting the cooling effect and potentially damaging it. That is why their hot side will usually be heatsinked and ventilated in order transfer as much of the excess heat as possible to the air and allow for the cooling effect at the cold side to continue. I have experimented with thermoelectric coolers and I don't recall them being reversible as in reversing its cold and hot sides to become a "warmer". What do the 3 positions of the switch do? Could you take a close up photo of the circuit board, top and bottom? Thanks.
