Solar energy, to heat pump heating and heating system diagram

● heating and heating principle:

As shown in Figure 1, the heat pump is mainly composed of a refrigeration compressor, a condenser, an expansion valve, an evaporator and the like, and is filled with refrigerant in the refrigeration circuit. Refrigeration compressor through the three-phase AC high-speed rotation, the low temperature and low pressure refrigerant gas into the compressor, compressed into high pressure and high temperature gas, the high temperature and high pressure gas is cooled by the condenser cooling water, into a medium temperature refrigerant liquid , The refrigerant liquid through the expansion valve throttling decompression into the evaporator, the evaporator connected to the suction port of the compressor, the compressor constantly inhaled refrigerant gas refrigerant, making a large number of refrigerant into the evaporator The pressure is reduced and the refrigerant evaporates further. Since the other side of the evaporator is connected to the groundwater pump, when a large amount of local sewage flows through the evaporator, the evaporated refrigerant takes away a large amount of heat in the groundwater (because the refrigerant evaporates, that is, the refrigerant absorbs heat ). Groundwater contains a lot of low-temperature heat of the Earth's shallow soil, these low-temperature heat through the groundwater medium is evaporated by the evaporator refrigerant absorption extracted into refrigerant heat, was continuously inhaled refrigeration compressor. After the compressor is compressed, it turns into a high-temperature gas of 80-90 ℃. The high-temperature gas, which is cooled by the condenser, transfers a large amount of high-temperature heat to the heating system on the other side of the condenser. 80-90 ℃ high temperature refrigerant gas is cooled process can also be seen as the heat transfer to the cooling system of these high-temperature process, or the heating system heating process to maintain the heating system water temperature at 50-60 ℃, through the fan coil Or radiator load to the air-conditioned room.

In summary, the heat pump unit is the electrical energy into the compressor, the compressor into electrical energy into high-speed rotating mechanical energy, mechanical energy through the compressor will be mechanical energy into heat energy, compressor output total heat = compressor electrical power + compression Machine to absorb groundwater heat, and to draw well water is far greater than the compressor electrical power. Generally, the heat energy extracted from the well water is 4-5 times of the thermal energy generated by the compressor electric power, so the energy-efficiency ratio of the heat pump unit = kw / kw≈4.5. The energy efficiency of electric boilers = output heat (kw) / input power (kw) ≈ 0.9 ~ 0.98 or so, from the above comparison can be seen that the heat pump unit is energy saving equipment, compared with the electric boiler is also an electric heating equipment, But the heat pump is more economical than electric boilers operating costs, deserve the strong promotion of power sector equipment, the ultimate benefit is the power sector, and then the user, the environmental protection, the power sector, the whole society is a great benefit thing .
In order to further improve the efficiency of water source heat pump, our company has independently researched the solar heat pump unit, that is, the groundwater is further heated by solar energy to make the heat pump extract more heat, Higher, lower operating costs of innovative technologies.

Solar energy extraction is based on solar collectors to convert solar energy into hot water, the solar energy, ground to superimposed submersible pump groundwater can be carried in the superimposed with solar energy and then superimposed into the evaporator, greatly increased the evaporator The temperature difference between the water side and the total heat output of the compressor increases to improve the energy efficiency ratio of the heat pump unit. The heat pump system combining the solar energy and the earth energy can make the energy efficiency ratio increase as the solar heat collecting area increases, Energy efficiency reached 6 to 7 or so. In other words, the evaporator water temperature increases, the evaporator will increase the evaporation temperature, thereby increasing the efficiency of the compressor so that the compressor to take the same heat power decreased, further saving running costs. The above is about the working principle of winter heat pump heating system and schematic diagram.

Water source heat pump refrigeration system schematic (Figure 2)

● cooling principle:

Water source heat pump air conditioning system has 8 conversion valves, the use of conversion valve to heat pump system into a heating system or refrigeration system.
Figure 2 is a system of heat pump cooling system. Compared with Fig. 1, the heating circuit composed of the exothermic end of the condenser is shifted to the heat absorbing end of the evaporator by the switching valve; the groundwater heat exchange system consisting of the heat absorbing end of the original evaporator is switched to the heat releasing end of the condenser for cooling The reagent circuit remains unchanged.

When the heat pump unit is cooling, the compressor lowers the low-temperature and low-pressure refrigerant gas sucked into the heat absorbing end into the high-temperature and high-pressure refrigerant gas after being compressed and discharges into the condenser, and is then cooled in the groundwater system of the condenser to become medium-temperature and medium-pressure refrigerant Liquid, refrigerant liquid through the expansion valve throttling decompression, into the evaporator further expansion evaporative heat absorption by the refrigerant liquid evaporation endothermic into refrigerant gas is suction end suction compressor, and then compressed by the compressor And then into the high temperature and pressure refrigerant gas discharged into the condenser, the evaporator coil fan coil load circuit (that is, air-conditioned room heat) continuously discharged into the ground through the condenser exothermic heat, air-conditioned room by the fan The coil converts the heat of the air into the water of the refrigeration water circuit, and is then sucked by the refrigerant evaporated on the refrigerant side of the evaporator by the heat exchange on the water side of the evaporator. The refrigerant liquid that absorbs heat absorbs the heat in the water after being evaporated, Into the state of gas compressor is reciprocatingly inhaled, compressed, exothermic cooling to complete the entire process.
In the shortage of groundwater and not allowed to drill wells, soil heat exchangers can be buried instead of drilling to complete the soil heat exchanger.