In recent days, many provinces and cities in China have been hit by storms. In the rainstorm, there are not only crops, but also many “weak†solar water heaters. Some brackets are severely distorted and deformed, and are hung on the roof of the building and are teetering. Some are pulled up by the strong winds and pulled up. Many rooftops equipped with solar water heaters are messy.
It should be said that the heavy rain is an urgent fact, but after the storm, most of the products of the good brands are still safe and sound, and they are normally used. However, some brand-name products are vulnerable. This situation is particularly serious in rural areas. It is understood that the main reason for not standing up to the test of wind and rain is that some of the solar water heater brackets are not too rigid, but have inherent “deficiency in calcium,†and there are problems in the installation, which has led to its “weaknessâ€, which mainly manifests itself in:
First, the quality of stent material does not pass. In accordance with the requirements of the industry recommendation, the bracket plate should be at least 1.5mm thick and 100mm wide to be qualified, and some solar water heater manufacturers cut corners for cost reduction. The bracket material becomes narrow and thin, only 1 to 1.2. Mm thick, 60 ~ 70mm wide; there are a number of bracket plate holes, the industry referred to as "saving material hole", which greatly reduced the ability to resist twisting, wind resistance. In the event of a stormy weather, these stents are like “cartilage†and are easily broken at the “save holeâ€. Some of the brackets are made of aluminum alloy materials. The wind resistance during the storm is obviously poor, and some of the brackets have been deformed by the wind.
Second, the material of the bracket is poor in corrosion resistance, or the corrosion protection is not thorough. Solar water heaters are exposed for a long time. The brackets must be treated with anti-corrosion treatment to ensure safety. However, some brackets use materials and processes that are not up to the standard, resulting in poor adhesion between the sprayed layer and the substrate, and they tend to age and fall off. Broken at the point of corrosion.
Third, the installation design is irrational, and the installation is not standardized, professional, and even cut corners. Many wind-blown support structures are unreasonable, do not conform to basic structural mechanics, and lack the necessary support and connection components. Some installation techniques are poor and have not been effectively fixed. They are simply "placed" on the roof. Some water heater brackets use a very thin wire even if the screw is "all things", non-standard installation is difficult to withstand the test of wind and rain.
For the solar water heater installation on the "cartilage" issue, in the solar water heater to the countryside to promote the entire industry trade activity under the general situation, the China Consumers Association reminded consumers, pay attention to the following points in the purchase of solar water heaters:
First, before purchasing a solar water heater, it must be determined whether its installation technicians are professional, whether the installation design is scientific, and whether the installation service is standardized. Solar water heater installation quality is directly related to the use and safety of solar water heaters. At present, in the solar water heater industry, there is a widespread phenomenon of "re-sales, not re-installation." Many companies do not establish a professional installation team, and installation personnel have not undergone rigorous training. Even some of the rural grocery stores have taken on sales agents. And the dual responsibility of installing a brand-name solar water heater, such "service", whether in the scientific and rational installation design, or the professional installation, can not guarantee the installation quality.
Second, we must pay attention to the selection of the stent, process, degree of thickness and other installation materials quality. At present, there is no mandatory national standard for installing solar water heaters, and there are no rigid regulations for the selection and strength of mounting materials such as brackets. If these installation materials are inferior in material selection and process, their anti-aging, anti-twisting and wind resistance will be very poor. It will inevitably lead to “cartilage†due to “calcium deficiencyâ€, which will leave the use of solar water heaters. Serious security risks.
Third, as far as possible choose to install a relatively well-known brand of products. At present, the solar water heater industry is a mixed bag, with mixed results. At present, under the circumstance that mandatory national standards for installation services have not yet been introduced, many companies do not pay enough attention to the installation quality and after-sales service. Relatively speaking, some responsible companies set strict installation standards. , more standardized, after-sales service is also relatively complete, therefore, when choosing a solar water heater choose a good reputation, reliable installation quality, after-sales service is guaranteed brand is undoubtedly the best policy.
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