What should you pay attention to when buying a solar water heater

How big you buy is important.

For example, my family's.

The 8 bathrooms on the third floor are connected, and I bought a set of more than 8,000.

1. First of all, the quality, especially the material of the inner tank, and the function of removing water rust;

2. The capacity is suitable;

3. Energy saving; 4. Fast heating;

5. Pay attention to whether its after-sales service terms are reasonable;

6. Turn a few more, go more, see more and compare, and finally decide.

1. Pay attention to thermal performance indicators.

The higher the average daily efficiency, the better, and the lower the average heat loss coefficient, the better. If you need to configure an electric heating device, you should choose a product with an electrical safety design.

Purchase other related accessories, such as automatic water supply device, water temperature and water level indicator, solenoid valve, etc., to be cautious, to ask about the service life and warranty period, some functions seem to be advanced, but there are too many components, the reliability is not high, and it is easy to have problems after a long time.

Second, the key component is the vacuum tube.

The key component of a home solar water heater is the vacuum tube, and the coating on the glass tube inside the vacuum tube should be carefully observed when purchasing. The coating color is uniform, the film layer has no scratches, no peeling or peeling, there are no stones or nodules on the glass, and the supports supporting the inner glass tube are placed correctly and not loose.

At the same time, it should be noted that the center distance between the two tubes of the vacuum tube should be about 70 mm. At present, there are various forms of reflectors for household solar water heaters on the market, and attention should be paid to whether the reflector design can make full use of the heat-absorbing surface of the vacuum tube and whether the vacuum tube can receive light to the greatest extent.

3. The design of the bracket should be reasonable.

For solar water heaters, the bracket design should be reasonable, and there should be enough strength and rigidity. In some areas with high daily winds, especially coastal areas, attention should also be paid to whether the product is designed to resist wind.

Fourth, pay attention to the brand.

It is necessary to buy products with original standard accessories and pipelines as much as possible, and be cautious about buying "semi-finished" solar water heaters. It is necessary to choose brand products with good reputation, product quality and after-sales service as much as possible, and do not buy the "three nos" products produced by small workshop enterprises.

1. You can't replenish water immediately. Even in the severe winter, the water tank must not be replenished immediately after the water is empty, because the vacuum tube can reach about 2500C when the vacuum tube is empty, so there is no water in the water tank or the water must be carried out before sunrise or half an hour after the sun sets, in order to prevent the pipe from exploding.

2. Use electric auxiliary heating to prevent dry burning. If an auxiliary heat source is installed, the auxiliary heat source device and heat exchanger should be checked regularly to see if they are working properly. For the auxiliary heat source is heated by an electric heating pipe, it is necessary to ensure that the leakage protection device works reliably before use, otherwise it cannot be used.

Special attention should be paid to water supply when using auxiliary electric heating, and the water volume in the water tank should not be less than 50% to prevent dry boiling without water. When taking a bath, special attention should be paid to unplugging the power plug, and it is strictly forbidden to use it with electricity.

3. Correct use of electric heat tracing. When installing heat tracing, we must pay attention to choosing products with good quality to ensure that they can be used normally and reduce hidden dangers. When using the heat tracing, pay attention to turn off it in time after thawing, and try not to use it when the voltage is unstable.

4. Make sure that the water heater can resist the invasion of strong winds. In winter, solar water heaters are installed outdoors, so the water heater and roof should be installed firmly to resist the invasion of strong winds. In case of windy weather, the solar Hukidan water heater can be filled with water to increase the wind resistance and load-bearing capacity of the water heater, and disconnect the power supply such as electric heating and instrumentation.

How to choose a solar water heater? Buying tips

Solar energy is the most abundant clean energy source, and solar water heaters are increasingly becoming the "new favorite" in the market. However, the current development of the solar thermal banquet water transporter market is not satisfactory, due to the low production threshold, the solar water heater on the market is "mixed", which brings inconvenience to consumers to buy solar energy products. So how can you choose a safe and reliable solar water heater?

Tips for choosing a solar water heater:

1. Look at the brand. It is necessary to choose the products of specialized manufacturers, preferably high-quality brands, so that it is possible to have excellent product quality and excellent after-sales service system and commitment.

2. Look at the quality of the vacuum tube. The vacuum tube is a key component of the water heater, and the amount of heat obtained by the vacuum tube under the same external conditions directly affects the water temperature. When purchasing, carefully observe the coating on the glass tube in the vacuum tube, its color is generally black, dark blue or dark gray, the coating color is uniform, the film layer has no scratches, no peeling or peeling, there are no stones on the glass, and the support is placed upright and not loose.

3. Look at the material selection and process technology of the insulation layer and the inner tank. There is a layer of insulation material between the shell and the inner tank of the solar water heater tank, which plays a very key role in hot water insulation, and the service life of polyurethane insulation materials can reach more than 15 years. The inner tank is where the hot water is stored, preferably with a stainless steel plate, with a thickness of about millimeters.

In short, consumers should choose imported polyurethane and water tanks with thick insulation layer. Because the insulation layer and inner tank of the water heater are inside, it is not easy for consumers to see, so it is better to buy products with a good reputation in the market and guaranteed in terms of product quality, performance, and service.

4. Look at the thermal performance index. It is not that the higher the temperature of the water in the tank, the better the thermal performance, but the higher the average daily efficiency, the better, and the lower the average heat loss coefficient, the better. The second is to see whether the pressure test of the water heater is qualified, and if the pressure test does not meet the standard, it will easily lead to the leakage of the water heater, which will waste hot water and cannot be used.

5. Look at the bracket design. The bracket should have sufficient strength and rigidity.

6. Look at the reflector design. When purchasing, attention should be paid to whether the reflector design of the product can make full use of the heat-absorbing surface of the vacuum tube, and whether the vacuum tube can receive light to the greatest extent.

7. Look at the technical side to search for losses. In terms of critical technologies, consumers should also pay attention to identifying:

1) Different colors of vacuum tubes, because the absorption layer is different, the effect is also very different;

2) Most companies do not use reflectors, because after a period of use, the reflector becomes a decoration, there is too much dust, there is no effect at all, and from the perspective of windproof, it does not support the use of reflectors;

3) The thicker the insulation layer, the better, after reaching the critical thickness, the thicker the insulation layer is useless;

4) The thickness of the water tank plate, for the non-pressurized water tank, is almost the general standard of second-tier manufacturers, which can already ensure the service life of the water heater, but why is there a leakage beam, it is a famous brand product, **expensive, the cost increases a little, and the sales ** are 50% more expensive than others.