As a natural phenomenon, just as water flows from low to high, the heat also always flows from the high temperature zone to the low temperature zone. But people can create machines that use water pumps to pump heat from low to high temperatures, just as water is raised from low to high. Therefore, the heat pump is essentially a heat lifting device. The function of the heat pump is to draw heat from the surrounding environment and transfer it to the heated object (the object with a higher temperature), which works in the same way as the refrigerator and is in accordance with Reverse Carnot cycle work, the only difference is the operating temperature range. Heat pump at work, it consumes part of the energy itself, the energy stored in the environmental media to be tapped, through the heat transfer medium circulation system to increase the temperature to use, and the entire heat pump device consumes only a small part of the output power Therefore, the use of heat pump technology can save a lot of high-grade energy. In operation, the evaporator draws heat from the surrounding environment to evaporate the heat transfer medium, the working fluid is compressed by the compressor and the temperature and pressure rise. When the high temperature vapor condenses into liquid through the condenser, the heat released is transferred to the reservoir Water in the tank Condensed heat transfer medium through the expansion valve back to the evaporator, and then be evaporated, so cycle back and forth. Waste heat utilization of powerful tools - heat pump water flow from high to low, the heat from the full temperature objects to low temperature objects, which is a natural law. However, in real life, people use pumps to carry water from low to high for the purposes of agricultural irrigation and domestic water supply. Similarly, in today's increasingly tense energy, heat pumps are used to transfer heat from cryogenic objects to hot objects in order to recover low-temperature hot air normally discharged to the atmosphere, low-temperature hot water discharged into rivers, etc. High temperature Objects to heat water or heat, make full use of heat. The working principle of the heat pump is basically the same as that of the home air conditioner and the refrigerator. The working principle of the heat pump is basically the same through the flow medium (formerly Freon, which is replaced by Freon instead of Freon) in the vapor phase in the evaporator, compressor, condenser and expansion valve Variations (boiling and condensation) circulate the heat of the cryogenic object to the hot object. The specific work process is as follows: â‘ superheated liquid medium in the evaporator to absorb the heat of low-temperature objects, evaporated into gas media. â‘¡ evaporator gas out of the compressed media after the compressor, into a high temperature and pressure of the gas media. â‘¢ high temperature and pressure of the gas medium in the condenser will release heat to high temperature objects, while itself into a high pressure liquid media. â‘£ high-pressure liquid media pressure in the expansion valve, and then become overheated liquid media, into the evaporator, the initial cycle. The performance of the heat pump is generally evaluated by the coefficient of performance (COP). The coefficient of performance is defined as the ratio of the amount of heat transferred from a cryogenic object to a hot animal and the amount of power required. The heat pump typically has a coefficient of about 3-4, which means that the heat pump is able to transfer 3 to 4 times the energy of its own energy from a cryogenic object to a hot object. Now Europe and the United States are racing to develop a new type of heat pump. The new heat pump reportedly has a performance factor of 6 to 8. If this figure can be popularized, this means that energy will be more effectively utilized. Heat pump penetration will also be amazingly improved. The current maximum output temperature of the heat pump is about 110 degrees. Exceeding this temperature can expose the media to the danger of decomposition. Due to the damaging effects of Freon on Earth's atmospheric ozone, in order to protect the Earth's ecological environment, in addition to increasing the factor of the heat pump and making efficient use of energy, various countries are also devoted to the development of new refrigerants. Currently there are alternative freon media has been applied. Heat pump hot water system includes heat pump host and heat exchange water tank in two parts. The main part of the heat pump includes air-cooled evaporator, compressor and expansion valve; heat exchange tank is a built-in condensing coil storage tank. Refrigerant (working fluid) in the evaporation tube to absorb the heat in the ambient air by the heat pump cycle by the condensation coil in the tank to release heat and heat the water in the tank. To figure out the working principle of the heat pump, we must first understand the working principle of the refrigeration system. Refrigeration system (compression refrigeration) generally consists of four parts: compressor, condenser, throttle, evaporator. The working process is: low temperature and pressure liquid refrigerant (such as Freon), first in the evaporator from a low temperature heat source (such as chilled water) absorbs heat and gasification. The compressor then draws the vaporized refrigerant gas in the evaporator and compresses it into the condenser, at which point the refrigerant gas becomes a high-temperature, high-pressure gas. The high-temperature high-pressure gas is condensed in a condenser by a high-temperature heat source (for example, cooling water) to become a liquid and becomes a high-temperature and high-pressure liquid refrigerant. And then intercepted by the throttle valve into a low temperature and low pressure liquid refrigerant. This completes a refrigeration cycle. For a split heat pump air conditioner, the condenser is placed outdoors in the summer and the evaporator is placed indoors. Run the indoor heat delivered to the outdoors. In winter, the evaporator is placed outdoors and the condenser is placed indoors so that the outdoor heat is delivered to the interior. Of course, we do not disassemble equipment for the season, but through the physical conversion valve so that the evaporator and condenser transposed. Heat pump air conditioning inside a four-way valve. In cooling conditions, the indoor heat exchanger is the evaporator, and the outdoor heat exchanger (the one that calls out the hot air in the summer) is the condenser. In winter heating, the four-way valve to switch to change the flow of refrigerant, this time, the indoor heat exchanger is the condenser, outdoor heat exchanger (winter out of the cold wind that thing) is the evaporator. As the winter out of the cold, the heat exchanger to frost, so frost to a certain extent, the four-way valve to switch, air conditioning into the summer cooling conditions, outdoor heat exchanger to get the heat, defrost, defrost After the completion of the four-way valve and then switch to the heating state. In case of defrosting, the fan of the indoor unit is stopped to prevent cold air blowing into the room. The heat pump is a refrigeration system that uses the heat from the condenser to heat it. It is called the "thermal doubler" by the image. Currently on the market widely appeared on the home air conditioner, it has been widely used in heat pump heating, the heating coefficient has been as high as 3 or more. Well, the principle of using heat pumps to make hot water, electricity consumed once the hot water, electricity consumption than ordinary electric water heater to obtain more than three times, which is not traditional water heater can match. ?