which is the world-s small airconditoning unit i.e. with respect to?

Question

its weight so that i could be fitted with an umbrella to protect the holder from the hot that sun produces during summer season

Answer 1

There are solid state ones that are very small (size of a fist or less). They are called thermoelectric ones. They take DC power (like from a battery) and use the Peltier effect to have one side that turns cold and the other that turns hot. They are in some portable stove/fridge units for camping.