From accessories to expose the short-lived factors,
First, the insulation layer.
Solar water heaters produce hot water during the day and stored in a storage box, if the insulating layer of thermal insulation performance is not good, overnight, rainy days can not be used, or difficult to use. Solar water heater insulation resulting in poor performance is largely due to water heaters, insulation, insulation of hot water temperature determines the quality level and the amount of hot water. Good insulation layer using imported raw materials, such as polyurethane, low thermal conductivity, high temperature; high temperature insulation technology using automatic quantitative foaming, and high temperature aging treatment, lasting and stable high performance insulation. Some poor materials, high thermal conductivity, foam is not uniform, night temperatures can drop more than ten degrees, rainy days experienced no hot water. Some black-hearted enterprise, in order to reduce costs, even using homemade benzene board, insulation effect plummeted a few months later, in 2012, after almost no insulation.
Second, the liner.
Currently, most have said that the water tank is stainless steel. Also stainless steel, but chromium and nickel in stainless steel are very different. Good solar water heater using high chromium high nickel stainless steel liner, to ensure the liner rugged, corrosion-resistant and strong; inferior to use more low-grade stainless steel liner, the basic nickel-free, corrosion-resistant performance is poor, life is short.
Third, the vacuum tube.
Vacuum core components, solar water heater is the \"heart.\" It directly determines the quality of the entire water heater performance. Performance by the use of vacuum coating technology and cleaning, coating, vacuum, seal and other processes and so on. However, some ultra-low-cost solar water heater vacuum tube used has the following shortcomings: the vacuum is low, only high-quality products, 1 / 100; tube a lot of residual impurities and water vapor, in the face becomes hot gas, the vacuum was reduced; low vacuum poor performance under stable film, the intimal layer on two or three years of aging, loss, leading to a sharp attenuation of collector performance, can not absorb enough heat.
Fourth, installation and service.
Requirements for the installation of solar water heaters are very high, professional installation is easy winter foundation and its protection. Some brand-name companies to recruit workers often four form a \"guerrilla\", no formal training in a hurry after induction, both of these people do not understand the design of piping, water heaters, the main fixed and other professional knowledge, but do not know a post of maintenance, resulting in problems abound, the direct impact of solar water heaters \"standard life.\" For example, the mounting bracket for fixed water heater parts, big brands use more steel bar, strong, corrosion-resistant, but some small manufacturers have used a fixed wire, resulting in some areas when confronted with heavy rain, hail and other inclement weather, there is no less solar water heater crashing to the ground. Solar hot water project, solar water heaters in the course of what issues should pay attention to? 1, note the time in Sheung Shui. 2, according to weather conditions, the decision on the water to ensure proper water temperature when bathing. 3, regular check water heater pipes, vents and other components are working properly. 4, air pollution or wind, dry areas regularly wash vacuum. 5, the water heater installed, non-professionals do not easily move, loading and unloading the machine, to avoid damage to critical components.