Heat exchanger : Scalp Cooling Cap, UK patent, GB2530496 (A) ― 2016-03-30

A heat exchanger 30 comprising a layer of material defining a passage 52 through which a heat transfer fluid may flow. The material layer has a first side for contact with the object; and a second side which, in use, will face away from the object. The first side has a relatively high coefficient of thermal conduction. The second side has a relatively low coefficient of thermal conduction compared to the first side. The sides may be made from silicone rubber, with aluminium particles in the first side and a insulating layer external of the second side. The passage 52 has a boustrophedonic path. The first side may have a double arcuate outer surface.