Yu Xin Sun developed a cold version of the
October 15, 2010, at the 108th China Import and Export Fair (Canton Fair), the rain Xin introduced a solar water heater cold light version – \"polar bear\", tailored specifically for the alpine region, and proposed \" ice cold, enjoying sun bath \"slogan, in the northwest and northeast China to promote.
China\\ s northeast and northwest regions due to low winter temperatures, likely to cause cracking or pipe solar water heater can not heat water tank substantially normal use, this product is Xin Yu Sun developed for these conditions. Yu Xin sun first in the industry using biomimetic concept, the polar bear\\ s anti-cold physiological characteristics into research and development philosophy. \"Polar bear\" the core technology is self-developed light rain Xin-speed thermal core. It uses a high transmittance of borosilicate glass tubing especially hard, after a special treatment, inside and outside the single-tube double-pipe and a combination of inside and outside the tube laminated between high vacuum, low vacuum within the tube cavity, that is double collector and heat sealed vacuum collector. The use of pipe working fluid vaporization, the heat transmitted to the top of inner tube, heating the water tank, complete heat exchange, re-liquefied by gravity flow back bottom of the tube to achieve the superconducting heat cycle. The application of this technology of in the received sunlight when the endothermic start faster, higher heat gain and heat loss, while high pressure, is not easy to form a bomb tube, vacuum tube design of water to solve the collector tube the cracking problem, gas-liquid heat transfer cycle thermal conductivity, thermal conductivity is to achieve a one-way function, loss of heat is not locked at night, better insulation.