sublimator
/ˈsʌblɪmeɪtə/noun
1 Chemistry. A container or apparatus in which substances are heated in order to sublime them; a sublimer.
2A device for cooling the interior of a spacesuit or spaceship by forced sublimation of ice.
Origin
Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. Either from post-classical Latin sublimator vaporizer, or from sublimate + -or.