What is the quality standard for solar water heaters, to the vast number of consumers a clear standard for reference
2 insulation layer, the insulation layer plays a vital role, the insulation effect is not good, the temperature drop rate is very fast, especially in the winter, when the night when you want to take a bath, the water temperature is not hot,Good insulation layer using imported raw materials, such as polyurethane, low thermal conductivity, high temperature resistance; heat preservation process using automatic constant temperature high pressure quantitative foaming, and high temperature curing, high thermal stability and durability. And some poor material thermal conductivity is high, the foam is not uniform, the night temperature can drop more than 10 degrees, there is no hot water in rainy days. There are black hearted enterprises, in order to reduce costs, even the use of homemade benzene board, a few months after the heat preservation effect of a straight line, one or two years after the basic insulation.
You can look at several aspects:1 vacuum tube, which is the core of solar energy, the vacuum tube is not good, the solar energy can not reach a certain temperature, the use of summer does not matter, but in winter there is no way to use.Some ultra low-cost solar water heater using the vacuum tube has the following defects: low vacuum, only high-quality products 1/100; a large number of impurities and residual water vapor pipe, a high temperatures encountered into gas, vacuum reduction; low vacuum film stability of two or three years, intimal layer aging, fall off, resulting in the thermal performance decays rapidly, unable to absorb enough heat.
3 bracket. Support must be able to withstand all kinds of corrosion, or have 3-5 years after stent decay, collapse, the solar energy would be ruined, do not buy that support the paint on the brush, brush to paint on the easy detachment, scaffold exposed part is easy to rot, is not to buy stainless steel bracket. Stainless steel is not easy to rust, but the stainless steel material is soft, the bearing capacity is weak.4 liner, at present, most of the solar water heater manufacturers are said to be stainless steel water tank liner. Stainless steel, but chromium and nickel in stainless steel are very different. Good solar water heater uses stainless steel high chromium nickel, ensure the liner durable, corrosion resistance is strong; the use of low grade stainless steel liner is inferior, basic does not contain nickel, corrosion resistance performance is poor, short service life.
