With the improvement of consumer level and the rise of consumption demand after the end of the epidemic, people's demands for home life have changed from "heat absorption", "heat preservation", "water available" at any time, to "healthy hot water" and "superior quality" The transformation of real estate companies is also constantly improving the requirements for solar water heating systems. We need to tap new consumption potential through industrial upgrading of solar thermal utilization. In the past, electric water heaters have gone through the process of transitioning from stainless steel inner tanks to enamel inner tanks. Now, this situation is also applicable to solar water heaters.

The "liner" is as important to the water heater as the heart is to the human body, and the special effects of the inner tank of the water heater even directly affect the service life of the water heater. Due to the easy realization of the stainless steel liner technology and the low cost of production equipment and research and development, more than 90% of the products on the market use stainless steel liners. Stainless steel solar energy is in the "open" state without electric heating, the use effect is better, and the product life is longer, which is the advantage of the rapid popularization of solar energy products. However, once the electric heating device is installed, especially the pressure-bearing operation is adopted, the stainless steel liner product has great limitations. The problems of "easy to corrode" and "easy to deteriorate water quality" that occurred in the field of electric water heaters with stainless steel liners also often occur in solar water heaters, and cannot be solved from the root cause. Regular balcony wall-mounted solar energy adopts high-quality enamel liner, which occupies most of the market share in domestic and foreign markets.

 It can be seen from this that the birth of the enamel liner in the field of wall-mounted solar water heaters is a long process. From galvanized steel liner, to stainless steel liner, and then to enamel liner.