| 摘要 |
A disposable, in-line heating cassette (20) and apparatus (10) for raising fluid temperature. The cassette (20) comprises a spacer (300) defining a serpentine flowpath (308) interpose between flexible foils (200, 400) and mounted on a frame (100). The frame (100) comprises inlet and outlet tubes and related input and output ports (112, 122) which communicate with the serpentine path (308). Juxtaposed heating plates (12, 14) in direct contact with the cassette (20) contact the entire foil (200, 400) heating surface, providing an efficient thermal path from the heating plate to the foil and then to the fluid. The heating plates (12, 14) have several electrically conductive strips (584, 574) thereon for generating a gradation of heat energy such that more heat transfer occurs at the serpentine flowpath (308) inlet end than the outlet end. The strips (584, 574) are arranged on the heating plates (12, 14) immediately over and under the flowpath (308) and are divided into contiguous perpendicular sections with a conductor separation distance therebetween.
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