There are two ways:
1. You can cover the vacuum tube with cloth or other coverings so that the water does not need to be drained;
2. is not covered, it will. The water in the pipeline must be drained (open the exhaust valve to drain it), but there must be water in the water tank to prevent the pipe from bursting when water is added again if not used during 3.4; months it can be drained, but solar energy must be used. Cover the vacuum tube with a cloth, otherwise the temperature of the water tank will be very high if it is air-dried, and it will not be good for the coating layer of the vacuum tube. If it is not used for a short time, there is no need to empty it. The water in solar energy will not freeze in winter (the heat absorption effect of brand solar energy is good). and block, but this can be fixed by adding a ribbon chauffant. This glitch can still be used in winter. Another tip is to use water as often as possible during the day. In the evening, before going to bed, turn on the hot water tap slightly and let the water flow slowly. Open it as little as possible. It can also effectively prevent water from flowing. reduce water pipes from freezing and blocking and improve the utilization rate of solar energy.