| 摘要 |
To simulate the experience of breathing hot or warm air in the use of breathing apparatus, this invention provides an apparatus comprising a canister through which the wearer inhales and exhales, the canister being filled with a reagent which creates heat by reaction with the carbon dioxide or moisture in the exhaled breath. The inhaled air absorbs the heat given out by the reaction. The apparatus can be modelled on the actual breathing apparatus to be used and is highly acceptable to users.
|
