Solar water heaters after 20 years of development today, China's solar water heater industry from scratch, from small to large, experienced a rapid development period, has appeared in four products, namely nausea drying-type water heaters, plate-type water heater, all glass vacuum tube water heaters and heat pipe vacuum tube water heater. Although the efficacy of performance has been greatly improved, but the result is still not satisfactory.
Currently exist or is no good solution includes the following aspects: increase the collector area, the vacuum tube scaling, cracking, poor circulation, down pipes freeze plugs, vacuum tube, water tank seal is not good, water heaters can not The pressure to run the water heater "summer boil, water heater the winter cracking pumping flat, pressurized small solar panels water heater can not control thermostat pressure, can not be used without water, solar energy and buildings are not well integrated combined, single-tube rupture affecting the operation of the system, automatic control of water supply, auxiliary heating organic combination with other heat source.
When customers face many disorder, the ruins lying with the solar water heater on the roof, in the face of those spring winter volts - bad winter with solar water heaters, face make maintenance calls is empty, find manufacturers investigation no such factory "PV inverter energy", in the face of hammering technology behind the hand workshop production of "hand-solar", they can not help a lot of trouble? Therefore, purchased and installed trouble, trouble, service trouble, and neighborhood relations, and property management in trouble and other issues must be restricting the development of solar water heaters. Faced with such a discrete and strong, waste and raw material resources industry, national authorities have in considering to take the necessary measures.
Solar water heater is born, it has high profits from low-threshold gradual transition to a low-margin high threshold. With the strength of some manufacturers, modern equipment and internal quality improvement has been gradual and hand-workshop-type enterprises distance. Some manufacturers want to expand production capacity, expand the industrial scale, lower prices to make solar energy more affordable, and can get into the homes of ordinary people, so that the prices were inflated, enterprises are facing tremendous pressure, and then start the solar industry shuffle.
However, restricting the development of solar energy industry and is not only the price factor and capacity factor! But the solar water heater can not change 20 years of rigid structure, can overcome many drawbacks exist in the solar water heater, solar building integration can not be achieved, give full play to focus on the preparation of domestic hot water whether to play a solar system to take drinking distilled water, heating, cooling advantages, as well as whether the solar collector components and building materials organic combination demonstrated the advantages of the characteristics of the solar collector components renewable.
Therefore, if the solar water heater can not be a perfect combination with the building, even if the use of solar energy, also because of the destruction of the beauty of the building and increased insecurity, neighborhood, property and the user, solar water heaters and between users, between the water heater and building the obvious contradiction that can not be reconciled. Due to the presence of these constraints, the solar water heater to quickly reach a certain market share, has yet to further expand the industrial scale started to slow down the pace of development, become more apparent contradiction with the various aspects of the development potential of the industry as a whole.
Additionally, there is no solar photovoltaic, heating, cooling, integration and building zero energy supply and the lack of organic combination with other heating, cooling device, the solar products has always been difficult to righting harder to humble, and with the heat pump water heater , air conditioning, water heaters, the rise of highly variable, so that the future of solar products.