Which type of compressor is commonly used in window air conditioning units?

Window air conditioning units commonly utilize rotary compressors. These compressors are favored for their compact size, lightweight design, and efficient operation, which is particularly advantageous in the limited space of window units. Rotary compressors work by using rotating blades to compress refrigerant, making them effective and capable of maintaining a consistent cooling performance under varying load conditions. This is essential in residential applications where window units are often required to maintain a comfortable temperature efficiently.

The other types of compressors, while effective in various applications, have characteristics that may not align as well with the specific needs of window air conditioning systems. For instance, scroll compressors tend to be more commonly found in larger, split-system ACs due to their efficiency and quiet operation. Reciprocating compressors, although effective, are bulkier and can produce more noise, which may not be ideal for residential use in a window-mounted unit. Screw compressors are mainly used in large commercial refrigeration and HVAC systems because of their capacity for handling larger loads and continuous operation, which is unnecessary in the compact form factor of a window AC.