【摘要】 由于真空玻璃管的广泛应用使得太阳能热水器在冬季应用中也成为现实，可是上水管尽管采取保温措施，在东北的冬季和寒冷的高山地区也将结冻，采取线芯自控温电伴热系统措施可以完美解决上水管路冬季防冻问题更多还原

【Abstract】 The wide utilization of vacuum glass tubes made the application of solar water heater in winter became realizable,but in the winter in Northeast part of China and high-mountain area,the feed water line may be frozen,even though it was insulated.Using an associated electric heater with automatic temperature control,the frozen problem of feed water line can be solved completely.更多还原