subject: The Trick Buy Solar Water Heaters [print this page] Recent years, the solar water heater with its convenient, energy-saving advantage to win the urban and rural dwellers. Nowadays it to the purchase of solar water heaters season, can be sold on the market quite a mixed bag of household solar water heater products, many brands, how to choose a satisfactory, high-quality products? Experts in China for now the most popular vacuum tube solar water heaters to remind consumers to buy solar water heaters should be "Huiyanshizhu."
A look at vacuum. Vacuum tube solar water heater is the "heart", to identify strengths and weaknesses of the method of vacuum tubes, one hand touch, feel the temperature is normal if a slight chill, indicating vacuum tubes for the quality product; if feels hot, it indicates poor quality vacuum tube, it endothermic at the same time in the heat, the winter will use the relatively poor results. Second, with eye observation, selection should be carefully observed coating on the glass vacuum tube. Good quality coating color uniformity, film no scratches, no peeling or shedding phenomenon, the glass section and no stones or tumors phenomenon, supporting the supporting pieces of glass placed in correct, not loose. Center distance of two tube should be about 70 mm is appropriate. Currently on the market for domestic solar water heaters, reflectors variety of forms, selection should pay attention to whether the design of reflectors can take full advantage of the vacuum tube of the absorber, the maximum degree of vacuum can be light.
Second look at the water tank. Is very important for the water heater tank, it is solar water heater "hot water storage." Water tank liner material is best to use stainless steel plate, thickness of 0.5 millimeters thin affecting life. Experts point out that the general weight of the water tank and good quality. Mainly by the severity of the water tank shell tank timber and tank shell and the water container of foam layer between the decision. General relatively poor water tank, the shell is shiny stainless steel for the material (the current number of cities have banned the use of such material heater, because of light pollution), and the thickness of the shell is not enough lighter.
Foam layer is directly related to water heaters, insulation effect, directly affect the amount of solar hot water heater can be used much, so the use of the water heater is also very critical. Good insulation of imported raw materials, high-pressure automatic quantitative foaming temperature insulation technology, and high temperature aging treatment, heat stable lasting high performance. Poor insulation foam uneven performance declined sharply after two or three years.
Third is optional. Solar water heater is a hot water system, a good host is also a good auxiliary equipment and accessories needed to achieve the good with the use of the results. Sheung Shui devices such as automatic, temperature and water level indicator, solenoid valves, etc., for these devices should be selected carefully, and some features may seem advanced, but too many component parts, reliability is not high, over time it is easy to go wrong.
In addition, experts also remind consumers that purchase solar water heaters depends on the brand and services. The choice of brand to homes, "small" take "big." Big brands mean more and more reliable protection. The number of SMEs in product quality, after-sales service are difficult to guarantee. Solar Water Heater service is also very important. Because domestic solar water heaters are durable consumer goods, once a fault, the user is difficult to themselves, so after-sales service must be protected. Currently, the market generally machine free warranty period of 3 years to 5 years. In addition, domestic solar water heater is installed outdoors, prolonged use, the vacuum tube will be dust or impurity, leading to lower heat-absorbing efficiency. Therefore, the vacuum tube on the water heater should be cleaned regularly. If its not clean, they should ask dealers, after-sales service is included in a regular cleaning.
Last to see their families. In the purchase consideration should be given permanent home in the population, to determine the purchase of solar water heaters for domestic water capacity size. 40 liters of water per person a general standard is appropriate. In addition, the purchase should be clear to vendors, their nominal water capacity refers to the capacity of all the water is actually available water capacity, the difference between the two.
