Kraning K K, Schibli E G, Momii S T, Merrick E A
J Appl Physiol Respir Environ Exerc Physiol. 1978 Jun;44(6):981-5. doi: 10.1152/jappl.1978.44.6.981.
A compact 4-W gas-stream heater for use with ventilated sweating capsules is described. The heating element is constructed from two modified 75-omega power resistors connected in parallel and contained in the capsule gas inlet tube. Heater power is controlled with integrated circuits which compare the output of a thermocouple, measuring either capsule skin or air temperature, with a predetermined target temperature. The unit responds fairly slowly to sudden large changes in target temperature, but once a steady state is achieved, maintains target temperature levels despite changes in evaporative heat loss. The device is well suited for studies in which local skin temperature or capsule air temperature must be elevated and clamped while the effects of other local stimuli or central thermoregulatory activity are studied, and in studies where the skin temperature effect on transepidermal water loss must be controlled.
本文描述了一种与通风出汗胶囊配套使用的紧凑型4瓦气流加热器。加热元件由两个并联的改良型75欧姆功率电阻构成，置于胶囊气体入口管内。加热器功率由集成电路控制，该电路将测量胶囊皮肤温度或空气温度的热电偶输出与预定目标温度进行比较。该装置对目标温度的突然大幅变化响应相当缓慢，但一旦达到稳定状态，尽管蒸发散热有所变化，仍能维持目标温度水平。该设备非常适合在研究其他局部刺激或中枢体温调节活动的影响时，必须升高并固定局部皮肤温度或胶囊空气温度的研究，以及在必须控制皮肤温度对经皮水分流失影响的研究中使用。
