Is it suitable to use solar water heaters in Chongqing?

Of course it's appropriate. In Chongqing, there is plenty of sunshine from spring to summer, and solar water heaters rank 1. Huang Ming Solar China well-known trademark, national inspection-free product China famous brand, top ten solar water heater brands.

2. Sang Le Solar China well-known trademark, national inspection-free product China well-known trademark and top ten solar water heater brands.

3. Pu Tian solar energy national inspection-free products and solar water heater brands of top ten large enterprises.

4. Huayang solar energy national inspection-free product, one of the top ten solar water heater brands in China.

500 million solar energy national inspection-free products, the top ten brands of solar water heaters in China.

6. National inspection-free products for solar rain and solar energy, and the top ten solar water heater brands in China.

7. Haier Haier China well-known trademark, national inspection-free product China famous brand and top ten solar water heater brands.

8. Tsinghua Sunshine National Inspection-Free Products and China Top Ten Solar Water Heater Brands.

9. Linoret solar energy national inspection-free product, one of the top ten solar water heater brands in China.

10. Brilliant solar energy national inspection-free products, the top ten solar water heater brands of China famous brands = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = According to the manufacturing process, it can be divided into pressure-bearing type and non-pressure-bearing type At present, the most common domestic solar water heaters sold in the market are mostly non-pressure vacuum tube domestic solar water heaters. General:

Look at the vacuum tube: vacuum tube is the most important part of solar water heater. At present, it can be divided into thick tubes (generally 58mm in diameter) and thin tubes (generally 47mm in diameter). Relatively speaking, the thick tube has large heat collection area, fast heat collection and high water temperature, so the thick tube solar water heater should be the first choice when purchasing.

There are mainly two kinds of materials for manufacturing vacuum tubes: single target machine and triple target machine, among which the quality of triple target machine is better, and consumers can identify it by appearance when purchasing. The color of the vacuum tube of the single drone is gray with color difference, and the inner wall of the vacuum tube is light black; However, the appearance of the vacuum tubes of the three target aircraft is blue, with no color difference, and the inner walls are dark red.

Second, balance the weight: the water tank is very important for the water heater. Generally, the quality of heavy water tanks is good. The weight is mainly determined by the material of the water tank shell and the foam layer between the water tank shell and the water tank liner.

Generally, the shell of poor water tanks is made of shiny stainless steel (many big cities have banned the use of water heaters made of this material because of light pollution), and the shell is not thick enough and light in weight.

Foam layer is directly related to the heat preservation effect of water heater, so it is also very important for the use of water heater. The foaming layer of famous brand products is generally foamed by high-pressure machine, so that there is no air between the shell and the inner container, and the foaming layer is dense and thick. So the whole water tank is often heavy.

Three evaluation brackets: aluminum alloy brackets are generally used for solar water heaters with good quality, which are thick and firm.

● Note: The quality of the water heater liner cannot be identified by its appearance, but consumers can judge it by reading the instructions. Generally, the water heaters produced by regular manufacturers are not vague about the material technology of the inner container. Therefore, consumers should read the instructions carefully when purchasing.

How to choose domestic solar water heater

At present, there are many kinds of domestic solar water heaters on the market, which can be divided into vacuum tube type and flat plate type according to the types of solar collectors. According to the structure, it can be divided into integral type and split type; According to the manufacturing process, it can be divided into pressure-bearing type and non-pressure-bearing type. At present, the most common domestic solar water heaters sold in the market are mostly non-pressure vacuum tube domestic solar water heaters. Pay attention to the following points when purchasing household solar water heaters:

1. The higher the daily average efficiency, the better, and the lower the average heat loss coefficient, the better.

2. The key component of domestic solar water heater is all-glass vacuum solar collector tube (vacuum tube for short), and the quality of vacuum tube directly affects the performance of the whole domestic solar water heater. When buying, carefully observe the coating on the glass tube inside the vacuum tube. This kind of coating is called solar selective absorption coating. Due to the different manufacturing processes of various manufacturers, the coating color will be different, but it is generally black, dark blue or dark gray. The coating with good quality has uniform color, no scratches, peeling and falling off, and no stones and nodules on the glass. The bracket supporting the inner glass tube is placed correctly without looseness.

3. Pay attention to the tube spacing between vacuum tubes when purchasing. Generally, the center distance between two tubes is about 70 mm. ..

4. The bracket design of domestic solar water heater should be reasonable, with sufficient strength and rigidity to ensure sufficient bearing capacity. In some areas where the daily wind is strong, especially in coastal areas, when purchasing domestic solar water heaters, we should also pay attention to whether the products have wind resistance in design.

5. At present, there are various forms of reflectors for household solar water heaters on the market, including plane reflectors, curved reflectors and embossed aluminum plates. Pay attention to whether the reflector design of the product can make full use of the heat absorption surface of the vacuum tube and whether the vacuum tube can receive light to the maximum extent.

6. When purchasing, we should also consider the number of permanent residents in the home to determine the water-making capacity of the purchased household solar water heater. Generally, the standard of 40 liters of water per person is appropriate. In addition, the nominal water capacity of many products is calculated by calculating the capacity of each vacuum tube and the capacity of the water tank liner, but in fact, the water below the outlet of the water heater and in the vacuum tube cannot be discharged for use, and the water that users can really use is only the water between the inlet and the overflow, so when buying, ask the seller clearly whether their nominal water capacity refers to the total water capacity or the actual water capacity, and how much is the difference.

7. If enough domestic solar water heaters need to be equipped with electric heating devices, products with electrical safety design should be selected.

8. When purchasing other related accessories, such as automatic water supply device, water temperature and water level indicator, solenoid valve, etc. The choice of these devices should be cautious. Some functions seem advanced, but there are too many components, and the reliability is not high, which is easy to cause problems over time. Be sure to ask about the service life and warranty period when choosing.

9. After purchasing a household solar water heater, pay attention to whether the bracket is firmly installed, whether all screws and joints are tightened, whether the installation position of the upper and lower water pipes is reasonable, and whether the water heater itself has reinforcement measures. In addition, a check device must be installed in the water supply pipeline to prevent hot water from flowing backwards and pouring into the cold water pipeline.

10. The after-sales service of domestic solar water heaters is also very important. It is best to choose well-known brand products and dealers with good after-sales service. Because domestic solar water heaters are durable consumer goods, they are generally installed on the roof. Once problems occur, it is difficult for users to solve them themselves, so after-sales service must be guaranteed. At present, the free warranty period of the whole machine on the market generally ranges from 3 to 5 years.

1 1. Because the domestic solar water heater is installed outdoors, the vacuum tube will be polluted by dust or impurities for a long time, resulting in a decrease in heat absorption efficiency. Therefore, the vacuum tube of water heater should be cleaned regularly, especially in snowy areas in winter, and it needs to be cleaned in time after snow. If you can't clean yourself due to the influence of house design, you should ask the dealer whether regular cleaning is included in the after-sales service.