Still say “sophisticated reverse heat engine” is a needlessly verbose way of saying refrigerator or heat pump.
Also how sophisticated is something that is mass produced for devices sold under $100 in every big box retailer.
Cooling for active outdoor technology has extremely variable outside temperatures (basically anything from -20 to 60 °C, or more if you take direct sunshine into account) and a constant generation of heat to be taken away.
Like mobile base stations of course have AC units and some amateur astronomers use peltier cooled sensors, but I would hardly call these mass produced consumer items.