| 摘要 |
A humidifier conduit has an enclosed helical passageway 47 in the wall thereof to provide an insulating barrier against heat transfer from the inside of the conduit 70 to the outside of the conduit. The conduit may include at least one heating means 31, 32 helically disposed between the inner wall 64 and outer wall 48 of the conduit to assist in the retention of a desired gases temperature in the humidified air flow which is to flow through the conduit in use. The conduit preferably is constructed by helical winding of a unit profile 62 and bonding of adjacent turns of the helically wound profile 62 to form the conduit, the unit profile 62 including complementary connecting means 55, 61 so that adjacent turns of the helically wound profile 62 are securely connected to form the conduit. The unit profile may include an overlapping member 54 to overlap adjacent turns of the profile and act in an armadillo-like fashion to ensure flexibility of the conduit, while retaining the insulative properties of the double wall48, 64 and enclosed helical passageway 47. <IMAGE> |
