HC Qiao Procurement: How to choose domestic solar water heater? - Solar energy, electromagnetic valve - heat pump industry

HC Qiao Procurement: How to choose domestic solar water heater

? - Solar energy, electromagnetic valve - heat pump industry

Currently, the market Sell Home Solar water heaters Variety, in accordance with the Solar Energy To distinguish between types of collectors can be divided into vacuum tube and a plate; in accordance with the structural distinction can be divided into integrated and split; in accordance with the distinction between production process can be divided into pressurized and non-pressurized. Currently, the market for solar home Water heater The most common type of household most non-pressure vacuum tube solar water heaters. We buy home solar water heater should note the following:

1. Thermal performance indicators, "the average daily efficiency," the higher the better, "the average heat loss coefficient" lower the better.

2. A key component of domestic solar water heater is the all-glass vacuum tube solar collectors (the vacuum), vacuum tube quality directly affects the performance of domestic solar water heaters. Purchase within the glass tube should be closely observed on the coating, which is called solar selective absorbing coating layer coating, as the manufacturers of different manufacturing process, coating color will be different, but usually black, deep blue or dark gray color uniform coating of good quality, Membrane Layer 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.

3. Buy vacuum tubes should also pay attention to spacing between the pipes, the general two around the center distance is appropriate in 70mm.

4. Stent design for domestic solar water heaters should be reasonable and should have sufficient strength and rigidity to ensure an adequate load-bearing capacity. Daily wind in some large regions, especially coastal areas, in the purchase of household solar water heater should also note that the product is designed to have wind resistance.

5. Currently on the market, domestic solar water heater reflectors variety of forms, with flat reflectors, curved reflectors, embossed aluminum, etc., in the purchase of the reflectors should pay attention to product design can fully use of the vacuum tube absorber, the greatest degree of vacuum can be light.

6. In the purchase consideration should be given permanent home in the population, to determine the capacity to buy water for household solar water heater size. 40 liters of water per person a general standard is appropriate. In addition, the nominal water capacity of many products is by calculating the capacity of each tube and the water container capacity calculated from the sum, but in fact the following water heater and vacuum tube outlet water is not released for use, the user truly The water is only used to the inlet and the overflow of water between the mouth, so in choosing vendors should be asked clearly, their nominal water capacity refers to the capacity of all the water is actually available water capacity, the difference between the two.

7. If you buy enough of household solar water heater need to configure the electric heating device should be selected with Electric Product safety design.

8. The purchase of other related accessories, such as automatic water feeding device, temperature and water level indicator, Solenoid valve And so the choice for these devices should be careful, some features seem advanced, but too many component parts, reliability is not high, over time, it is easy to go wrong, a choice sure to ask life and warranty.

9. Buy a home well after the solar water heaters, the installation process should pay attention to whether the installation bracket firm, all bolts and fittings are tightened, the upper and lower pipe installation location is reasonable, water heater itself has reinforced measures, etc. . In addition, Sheung Shui pipe must be installed only back into the unit to prevent water reflux, flow backward into the cold water pipe.

10. Domestic solar water heaters after-sales service is also very important. Select the best known brands of products and good after-sales service dealers. Because domestic solar water heaters are durable consumer goods, and usually installed in the roof, once a fault, the user is difficult to themselves, so after-sales service must be protected. Currently, the market machine free warranty period is generally 3 to 5 years.

11. As domestic solar water heater is installed outdoors, prolonged use, the vacuum tube will be contaminated dust or impurities, resulting in lower heat-absorbing efficiency. Therefore, the vacuum tube on the water heater should be cleaned regularly, especially in the winter snowy regions, snow is more need for timely clean up after. Affected by the housing design as their own can not be cleaned, should ask dealers, after-sales service is included in a regular cleaning.

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