A condenser coil is a device that was once used for evaporating the vapor from the liquid in the mixture before it was introduced into the vacuum cleaner. A typical condenser coil in a vacuum was large enough to be capable of holding thousands of gallons of fuel. It was also large enough to accommodate the evaporator coil, which would then suck the vapor from the liquid, cool it in the condenser coil, and turn it into gas that the vacuum cleaner would then be able to vacuum up.
Imagine if you would, a light bulb that could also be used to generate electricity. These devices were capable of generating current electricity, but they were also very costly to manufacture. And as such, the more expensive the coil the less power it was able to generate. The ability to produce low power from a high-power coil is what the modern condenser is made of. The new generation of compressors that have been developed can not only produce low power, but low cost electricity from high-power coils.
What this means is that the vacuum cleaner that you use does not rely on energy produced in the reverse cycle of the vapor extraction process. Instead, the device has the ability to produce both low cost and high power. A modern refrigeration system, which has the ability to operate within the limitations of the environment in which it is situated, is what has been created by advances in the electronic technology of the vacuum. This is the technology that has allowed the new generation of mini-processors and microprocessors to allow the modern condenser and evaporator coils to be the devices that the public was able to breathe easier through.