Basic knowledge of air source heat pump
Brief introduction of heat pump
There are many applications of pumps in daily life. The pump is a device to increase the potential energy. There are water pumps, air pumps, oil pumps, etc. according to different uses.
The heat pump, as the name implies, is a device for pumping heat. Heat pump technology is a new energy technology that has attracted much attention all over the world in recent years, and it is currently mostly used in heating and cooling air conditioners.
Heat pumps can be classified into various types according to their structure and purpose. According to the heat source method, the common ones can be divided into air source, water source, geothermal, etc.; the air source heat pump water heater is one of the uses of air source heat pumps.
Introduction to the principle of air source heat pump
The main working principle of the air source heat pump system is to use a small amount of high-grade electric energy as the driving energy, and efficiently absorb the low-grade heat energy from the low-temperature heat source (the heat energy contained in the air) and transfer it to the high-temperature heat source (water in the water tank) to achieve a "pump Hot" purpose.
Heat pump technology is a technology to improve energy quality. It is not a process of energy conversion and is not restricted by the limit of 100% of energy conversion efficiency. The heat released into the water by the heat pump water heater is not directly generated by electric heating, but the heat source is transported to the water through the heat pump water heater, so the average energy efficiency ratio can reach more than 400%. That is, 1 kWh can produce 4 kWh through the heat pump.
Comparison of energy efficiency of various water heaters
Schematic diagram of household air source heat pump system structure
System structure process description:
Compressor → high pressure protector → reversing valve → heat exchanger (household water tank) → throttling device → evaporator → low pressure protector → gas-liquid separator → compressor.
Commercial air source heat pump system structure diagram
System structure flow description:
Compressor → Reversing valve → High pressure protector → Casing heat exchanger → High pressure storage tank → Filter → Pressure relief valve → Expansion valve → Evaporator → Low pressure protector → Gas-liquid separator → Compressor. Schematic diagram of commercial direct heating air source heat pump system structure
