A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle. This liquid can then be circulated through a heat exchanger to cool equipment, or another process stream (such as air or process water). As a necessary by-product, refrigeration creates waste heat that must be exhausted to ambience, or for greater efficiency, recovered for heating purposes.Chillers may use hermetic scroll, or semi hermetic screw, or centrifugal compressors.

Chillers have become more and more commonplace in labs because they are accurate, convenient and easy to use. Add the options for rackmount, benchtop and portable and the reasons to use chillers multiply.  It can connect with rotary evaporator, vacuum freeze drying oven , cycle water vacuum pump , magnetic stirrer and so on , to achieve the chemical reaction or drug store under low temperature condition.