How to judge a water cooler or a semiconductor refrigerator by using a multimeter?
Method for judging quality of semiconductor refrigerating plate of water dispenser:Pick up 12 volts or less DC, can detect the refrigeration piece is usually red line connected to the positive voltage, black line connected to a negative voltage, if the heating surface of the reverse connection becomes cold induced is reversible, the voltage is close to the rated voltage, the refrigeration ability is stronger.
The semiconductor cooling plate is heated on one side and cooled on the other side, which is operated by the principle of heat transfer [Parr effect]. Normally, the rated voltage of the water dispenser is 12 volts DC, and the rated power is 50-80 watts. So we only need to pick up 12 volts or less DC, can detect the refrigeration piece is usually red line connected to the positive voltage, black line connected to a negative voltage, if the heating surface reverse becomes cold induced reversible [] voltage is close to the rated voltage, the refrigeration ability is stronger. You can use a 6 volt DC lead-acid battery 5 or 5 above security detection, pinch the refrigeration piece upper and lower sides of power in less than 10 seconds by hand, obviously can feel a hot side of the cold feeling, because there is no cooling time a little longer becomes hot on both sides...
A semiconductor is a material that is electrically controllable and can range from an insulator to a conductor. The importance of semiconductors is enormous, whether in terms of technology or economic development. Today, most of the electronic products, such as computers, mobile phones, or digital recorders, are closely related to semiconductors. Common semiconductor materials are silicon, germanium, gallium arsenide and so on, and silicon is a variety of semiconductor materials, commercial applications in the most influential one.
