| 摘要 |
A near constant heat transfer independent of the outdoor temperature is obtained in a garment, sleeping bag, or shoe, made of fabric or cloth according to the present invention. The insulation is provided variable with a plurality of variable thermal shunts arranged in an insulating layer. The thermal conduction of the shunts is controlled by opening/closing said shunts, wherein said closing/opening operation is dependent on the temperature. The temperature for opening/closing is settable by utilizing the thermal mismatch principle and the material properties of plastic and thermal conductive materials. The shunts or variable thermal conductors can also be made for manual activation by using an inflatable flexible tube to exert force on, and squeeze, the shunt conductors together, or to provide pressure to a pressure dependent shunt. The shunt supply pressure can also be regulated by a phase change liquid/vapour reservoir to obtain an automatic adaption to the ambient temperature. |
