The solar water heater is an environmentally friendly, environmentally friendly and energy-saving hot water equipment. The use of hot water is practically free and is widely appreciated by everyone. In order to fully receive sunlight, they are usually placed outdoors. So the question is: if the outside temperature is so low in winter, will the solar water heater freeze? This is undoubtedly an issue that we need to pay attention to. To be precise, as long as the water is used, the temperature is below 0℃, it may freeze and damage the solar water heater. However, in actual use, it is not so absolute. There are certain conditions.
As a solar water heater, it is generally divided into two types: one is a water tank and collector integrated and placed outside, and the other is a tank separate water supply and collector, also called wall balcony. .vssolar water heaters. In the latter case, since the antifreeze is used in the heat collecting plate, it will not freeze under normal circumstances. The former will always be frozen, and the reasons are:
1. Solar water pipes will freeze if not insulated.
Our solar power must have water pipes, and usually there is no insulation. In winter, when the outdoor temperature continues to be below 0℃, the water in the upper and lower water pipes is likely to freeze if it does not flow. When water freezes, the volume increases. which is likely to cause cracks in the pipe joints. This will cause freezing, and this situation is often encountered in daily life.
2. The solar water storage tank will be frozen.
The solar water heater has a water storage tank on the top. Although the water storage tank isolé, under normal circumstances, the water storage tank is insulated. the water inside will not be lower than 0℃, but in continuous rain and snow, low outdoor temperature and no high-intensity sunlight, it is likely that the water in the tank water is below 0℃, which will result in freezing. If there is a lot of water in the water tank, the water tank may burst when freezing or damage some connection structures, preventing the normal use of solar energy.
3. The sealing ring of the solar water heater will lose its function
There is usually a sealing ring at the connection between the vacuum pipe and the water tank of the solar water heater . Most sealing rings are made of silicone rubber or polyurethane. Yes, when the outside temperature is too low, they are likely to harden. Although they have a strong resistanceweather and are relatively resistant to cold, they will always expand with heat and. shrink in the cold, resulting in a loose seal. In this way, the solar water heater will lose water and it may freeze at the leak point, thereby damaging the solar water heater.
Based on the above three reasons, it can be found that when the outdoor temperature is too low, the solar water heater will always freeze and cause certain problems. Of course, in daily use, solar water heaters can still be used normally as long as they do not encounter extremely bad weather conditions and freeze. Some solar water heaters can still be used normally at minus 30 degrees Celsius. frozen. This is naturally inseparable from certain anti-freeze measures, so when we use solar water heaters, it should not be taken lightly. IIt is recommended to take certain anti-freeze measures.