| 摘要 |
The cooling system, primarily for use with protective headwear such as motorcycle helmets 3 to help minimise injuries following an accident, comprises an endothermic reactor 40,50 and a trigger 60 to initiate the endothermic reaction in the reactor whilst being worn on a wearer's head. The trigger is preferably arranged to initiate the reaction in response to detection of an impact or imminent impact, either through detection of acceleration or pressure generated on the headwear exceeding a threshold magnitude. The endothermic reactor may comprise two or more reagents which are initially stored in separate respective reservoirs and which react in an endothermic reaction when mixed through action of the trigger. The trigger may act to pierce or open a separating membrane between reagents and may comprise a plunger or shape memory alloy. Also claimed is headwear which uses gas-expansion to cool a wearer's head, headwear comprising a reagent package and motorcycle safety helmets. |
