Skills and methods of purchasing solar water heaters (matters needing attention and standards of purchasing solar energy for families)

Solar water heaters are no strangers to us, and they are very common in our lives. It has the characteristics of energy saving, environmental protection, safety and sanitation. So, how to choose a solar water heater that suits you? Let's have a look.

Pay attention to six standards when purchasing solar water heaters.

1. Durability standard: Different materials, processes and processes of solar water heaters have different service lives. The difference is that some can be used for 3 or 5 years, while others can be used for more than 10 years. As a hot water supply facility on the roof, the solar water heater does not affect the beauty of the room, and there is no need to worry about upgrading. Therefore, long-term, comprehensive performance, specifications and functions should be considered when purchasing. Otherwise, after three years, the solar water heater will not be hot, and its function will fall behind, so it is not worthwhile to buy it again. If you don't change it, it will be very uncomfortable to use. So buy good quality products from the beginning to avoid regret after buying them for a short time.

Second, the standard of heat collection: vacuum tube is the core of solar water heater. The strength and heat collection of vacuum tube is not only an important sign to measure the performance of water heater, but also an important factor to affect the heating capacity of water heater.

At present, the three-high vacuum tubes on the market adopt the patented three-high coating technology, and the vacuum degree reaches 10-4pa, and the performance will hardly decline after more than ten years. The standard of thermos container is inferior vacuum, and the vacuum degree is only10-1-10-2pa. After three to five years, it will neither absorb heat nor keep warm, but will only be used as water. 3. Insulation standard: The water storage tank is the hot water bin of the solar water heater, and its performance is mainly reflected in the insulation effect: a good insulation layer adopts imported raw materials, automatic constant temperature and high pressure quantitative foaming insulation process, and after high temperature curing, the insulation performance is high, stable and lasting. The foam of inferior insulation layer is uneven, and its performance drops sharply after two or three years.

Good solar thermal insulation materials and advanced thermal insulation technology can ensure good thermal insulation effect. The temperature of hot water dropped less overnight, and there was still hot water overnight.

Fourth, specifications and standards: ordinary water heaters can not meet the hot water demand of modern families in terms of hot water quantity, intelligent control degree, operating cost and water safety. The ideal water heater should not only solve the problems that ordinary solar water heaters, gas water heaters and electric water heaters can't solve, but also meet the hot, intelligent and free hot water demand.

Five, cold resistance standards: weak sunshine in winter, short illumination time, low temperature, large temperature difference, large demand for hot water, is the key period to test solar energy.

Due to technical limitations, the previous products are very useful in winter and rainy days. Now with the invention of interference coating technology, the heat collection performance of three high vacuum tubes has been greatly improved. Coupled with the application of automatic constant temperature and high pressure quantitative foaming insulation technology, comprehensive and strict insulation and antifreeze measures for outdoor pipelines have become a reality. Solar energy can be used in winter and rainy days, which is convenient to use. Heat is the last word and has become the gold standard to measure whether solar energy is qualified or not.

In fact, the demand for warm water in the United States is more obvious in winter. Especially when the weather is cold, it is the dream of many families to have enough economical hot water, and this dream can be realized completely. When choosing a solar water heater, besides the heat collection performance and heat preservation ability of the product itself, it also depends on whether the installation specifications and services are perfect.

Solar water heater is a system for heating water. A good main engine must cooperate with good auxiliary machines and accessories to achieve good use effect. The quality of the original fittings of solar water heater must be consistent with that of the main engine, which not only ensures the use effect and service life, but also solves the problem.

First of all, pay attention to regular water supply, and never carry water at noon. Due to the strong sunshine in summer, when the linear temperature of the vacuum tube reaches 270~ 400 in the sunshine, water can easily lead to the rupture of the vacuum tube. Therefore, you must choose morning or night when draining water. Second, determine the constant according to the weather conditions, and ensure the appropriate water temperature when taking a bath. Look at Tianshui: according to the weather forecast to determine the constant, you can get a satisfactory water temperature. It will be filled with water on a sunny day tomorrow. Or half a box of water on a cloudy day; It has been raining all day. Keep the original water level.

Third, it is necessary to regularly check whether the pipes, exhaust ports and other parts of the water heater are working normally. Check the air outlet regularly to ensure that it is smooth and will not expand or squeeze the water tank. When cleaning the vacuum tube, be careful not to damage its lower end. Solar water heaters with auxiliary electric heating devices should pay special attention to water to prevent anhydrous drying. There are many users who change the upper and lower pipes of solar water heaters in summer, so experts don't know whether the insulation layer of solar water heaters is aging and cracking. The upper and lower pipes are easy to harden and crack after sun exposure. Users had better install insulation layer and sun protection belt in advance to fully protect water pipes.

Advantages of solar water heater

1. The appearance is very consistent with the appearance of the building, free from the interference of architectural forms, and all parts are easy to assemble and maintain.

2. The planar solar water heater has high thermal efficiency. Plane solar water heater is the illumination that the whole surface touches the sun, which can receive the direct rays of the sun to the maximum extent.

3. The absorption plate, the core component of the flat solar water heater, is made of metal, which can bear the pressure of water during transportation and installation, or during use.

4. Combination of large-scale solar heating systems in large places.

Disadvantages of solar water heater

1. Flat solar water heaters are not suitable for use in cold and frozen areas. The refrigeration problem can't be solved well. Secondary heating must be used.

2. The solar core of the flat solar water heater is not vacuum, and the heat insulation effect is not good. Outdoor heating is fast and the temperature is low.

3. In winter, the plane solar water heater has been heated twice, but there is some thermal damage in the middle of the increase.

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