| 摘要 |
<p>Known kinds of apparatus for cooling human scalps, especially though not exclusively for preventing or reducing hair loss in conjunction with anti-cancer treatment by chemotherapy, suffer for various reasons from insufficiently accurate temperature control which drastically reduces success rates. All but the most basic and ineffective kinds of such apparatus are also very large units. Portable apparatus with accurate temperature control comprises a glycol tank 40 of minimal capacity, a generally conventional refrigeration system including an evaporator 42 disposed within the tank, a thermostat 76 for controlling the system to maintain the temperature of the glycol within close limits, and a single cooling hat 24 through which glycol from the tank is continuously circulated by a pump 66. The thermostat 76 is disposed at the outlet of the tank; and the pump continuously circulates some glycol directly back to the tank by way of a by-pass pipe 72 without passing through the hat. A safety device 82 which warns of low coolant flow without shutting down the apparatus comprises a temperature measuring probe arranged to activate an audible and/or visual alarm and disposed adjacent to the tank in a pipe 22 returning glycol from the hat to the tank. <IMAGE></p> |
