HOW DOES A FRIDGE WORK?
It all starts with the compressor (1). Like a large bicycle pump powered by a motor, it pushes a special gas through a very long, thin steel coil called the condenser (2). The condenser is located outside the refrigerator. The pressure inside reaches between 10 and 15 atmospheres, causing the gas to liquefy at a temperature of 45 degrees Celsius. The expansion valve (3) then reduces this liquid to atmospheric pressure, transforming it back into a gas while lowering its temperature. This is similar to the effect of an air freshener when you press the button. Finally, the (cold) gas circulates through a large coil (4) in the shelves and walls of the refrigerator, thus cooling the entire unit.
Follow the arrows!
The faster the compressor spins, the lower the temperature drops. All of this needs to be regulated!
In modern refrigerators, the fan speed is constantly adjusted to ensure a stable temperature for food. This means that as soon as the refrigerator door is slightly opened, the fan speeds up within a fraction of a second, which is a clear violation of Shabbat .