An air compressor is generally used in indoor, outdoor, and air-conditioning units. It is also called a rotary air compressor, and it is generally used in outdoor and indoor- as it is not used to air-conditioning units. A mini air compressor is generally a portable option and it is not suitable for home use.
Portable air compressor are also suitable for small camping refrigerators, so they will not take up much space and is the best choice for AC compressors.