Air source heat pump works: 

 Air source heat pump in operation, the evaporator heat from the air environment to draw heat energy to evaporate the working fluid, the compressor refrigerant vapor compressed by the pressure and temperature rise, high-temperature steam by permanently bonding the outer surface of the water storage tank special circular tube condenser condenses into liquid, releasing heat transfer to the air source heat pump water storage tanks in the water. Condensation heat transfer working fluid through the expansion valve back to the evaporator and then evaporated, and so the cycle. 
 Air source heat pump heat transfer working fluid is a special material, atmospheric pressure the boiling point of minus 40 ℃, the freezing point of minus 100 ℃ below, the substance is a liquid when cold, but it is easy to be evaporated into gas, and vice versa. In actual operation, the air source heat pump evaporation heat transfer limit of the working fluid temperature of about minus 20 ℃, 5 ℃ ambient temperature result of such low temperature is "hot", and even the temperature of snow, for example, 0 ℃ compared is hot, therefore, can exchange some heat. Fifth-generation heat pump heating system and the environment 
 History 
 1824 French scientist Kano (Sadi karnot) published Carnot cycle theory, the origin of heat pump technology to become British scientists in 1850 Kelvin (L. Kelvin) proposed to reverse Carnot cycle heat pump for heating the heat pump idea of ??the theory originated in the nineteenth the early century French scientist Sadi. Carnot (Sadi karnot), Kano in 1824 proposed the first time, "Carnot cycle" theory, 30 years later, British scientists Kelvin (L. Kelvin) proposed in early 1850: Frozen device can be used to heating, followed by many scientists and engineers had undertaken extensive research on the heat pump to study for 80 years. 1912 Zurich, Switzerland to the river as the successful installation of a low heat source heat pump equipment for heating, which is an early source heat pump system is the world's first heat pump system. Heat pump industry in the 20th century and early 40's to 50's rapid development, domestic and industrial building heat pump heat pump on the market, the heat pump into the early stage of development. The 21st century, with the "energy crisis" there, fuel prices suddenly rise, improved its efficiency heat pump developed low temperature heat recovery, energy conservation and environmental characteristics, re-stage of history, becoming the most valuable new energy technologies . Department set up before the International Thermal Heat Pump Centre International, works to promote the establishment of heat (Heat Pump Programme), the world's countries to promote the coordination and development of heat pump technology. United States, Canada, Sweden, Germany, Japan, Korea and other countries have official guidelines issued specifically to promote the application of heat pump technology in the society. 
 Advanced heat pump technology 
 Energy: 460% thermal efficiency, operating costs are gas, oil-fired boiler 1 / 3, the electric water heater 1 / 4, 40% lower than solar. Safety: water separation, no leakage risk for: -5 ~ 50 ℃ environment, environmental protection: no heat, water, waste gas Note: However, at present used by manufacturers of most of the heat medium (refrigerant) or R22, with environmentally friendly heating medium (the refrigerant ) R417A, 1394A era yet to come. Japan and other countries have taken the lead with CO2 as a heat medium (refrigerant), and do not damage the ozone layer (so in the installation, be sure to connect copper pipe tightly to prevent leakage of R22. If the R22 completely escape, without any negative impact to the environment .) In addition, above the R22, R417A, 1394A, CO2 are not causing harm to the human body, even if there is leakage, the entire water heating equipment are safe. 
 Heat pump Category: 
 Obtained by heat source heat pump can be divided into categories: water source heat pumps, ground source heat pump, air source heat pump, dual source heat pump (water source heat pumps and air source heat pump combined)