July 10, 2016
Air source heat pumps, a clean, environmentally friendly and energy-saving heating equipment, have attracted people's attention. After several years of rapid development, they have become one of the main heating equipment in the heating field. As a heating heat source, users experience more advantages. However, air source heat pumps also have the characteristics of one machine for multiple uses. They can not only be used as a heating heat source, but also as a cooling source for cooling.
Principles of heating and cooling with air source heat pumps
The structure of air source heat pumps is similar to that of water system central air conditioners. The difference is that air source heat pumps can be connected to multiple terminals (floor heating, radiators and fan coils). Air source heat pumps have two sets of heat exchange systems. In the heat pump host, heat is exchanged with air through the refrigerant, and then with water in the heat exchanger. Finally, water carries heat and cold to heat and cool indoors.
When used in winter, the air source heat pump absorbs heat from the air through the heat pump host (not directly converted from electrical energy to heat energy, so the energy consumption will be relatively low), and then transfers the heat to the heat exchanger, and heats the circulating water in the pipe to between 35℃-60℃ through the heat exchanger, and finally releases the heat to the room through different heat dissipation terminals, thereby achieving the purpose of heating.
When used in summer, the air source heat pump absorbs heat from the room through the heat pump, and then releases the heat to the outside. In this process, the heat pump host exchanges heat through the refrigerant, and then transfers the cold to the heat exchanger, and cools the circulating water in the pipe to 1℃-10℃ through the heat exchanger, and finally releases the cold to the room through the circulating water, thereby achieving the purpose of cooling.
Advantages of air source heat pump cooling and heating
1. Advantages of air source heat pump cooling
When the air source heat pump is cooling, the outlet temperature of the fan coil is between 15℃-20℃. Compared with the outlet temperature of the fluorine system central air conditioner between 7℃-12℃, the air source heat pump has a lower temperature difference with the ambient temperature, and the host is more energy-saving and power-saving when working. The temperature stimulation felt by the human body is also relatively small, and there will be no piercing feeling. In addition, the indoor humidity change is relatively small under the condition of low temperature difference, and it will not be too dry. It is precisely because the air source heat pump adopts water circulation, the specific heat of water is large, and it has a lasting insulation effect on heat and cold. The indoor temperature can be more lasting and constant, and the water temperature control is more accurate, and the indoor temperature is more stable. Therefore, the use of air source heat pump cooling is more comfortable.
2. Advantages of air source heat pump heating
When the air source heat pump is heating, there are floor heating, fan coil and radiator to choose from indoors. When the water supply temperature is between 35℃ and 45℃, floor heating can be used as the heating terminal. The floor heating coil is uniform and the heat is transferred from low to high. Therefore, the indoor temperature is relatively balanced, there is no dust and noise, and it can also prevent rheumatoid arthritis, which coincides with the traditional Chinese medicine saying "warm the feet and cool the top". In addition, floor heating is currently recognized as the most comfortable way of heating.
When the water supply temperature is between 40℃ and 50℃, fan coils can be used as the heating terminal. The air outlet temperature of the fan coil is about 32℃. Compared with the air outlet temperature of the fluorine system central air conditioner between 40℃ and 50℃, the air source heat pump can be kept within 10℃ of the indoor set temperature, which feels warm and comfortable, and can also prevent air conditioning disease. At the same time, the energy consumption of cooling is also very low. When the water supply temperature is above 55℃, radiators can be used as heating terminals. Radiators use convection and radiation heat dissipation to maintain the indoor temperature at 20℃. At the same time, they have the advantages of opening and closing at any time and heating up quickly. They are suitable for office workers who go out early and return late, and they are comfortable and convenient. In short, air source heat pumps, as a heat source for heating, can provide a variety of heating terminal options, which can not only meet the comfort of life, but also meet the convenience of user use, and also play the highest energy saving performance.
Final summary
Air source heat pumps are used for heating with the characteristics of comfort, energy saving, environmental protection, safety, stability, long life, and wide application range. At the same time, they also have the function of dual use. They can be used as a cold source for cooling in summer and as a heat source for heating in winter. The comfort of cooling and heating is quite high, which can meet the user's demand for home comfort. It is especially common in the south, so it is sought after by many users.
