Advantages of Air Source Heat Pumps Compared to Central Air Conditioners

Many people think that air source heat pumps and central air conditioners are completely different things. Air source heat pumps are mainly for "heating", while central air conditioners are mainly for "cooling". In fact, air source heat pump units are "both civil and military (heating and cooling needs)", and are "central air conditioners" with better performance.

The area of the evaporator of the air source heat pump unit, the heat transfer wind speed of the evaporator, and the spacing of the fins are all greater than those of central air conditioners. In summer, when cooling, the evaporator becomes a cooler, and the cooler releases heat outdoors. Therefore, the performance of the heat it releases is superior to that of central air conditioners. In other words, it can completely replace central air conditioners when cooling.

The air source heat pump for heating and cooling demand uses a "jet enthalpy increase" compressor. The main design condition for heating is below 0℃, and the main function is heating. The terminal is mainly floor heating, radiators, and fan coils. The central air conditioner is designed to heat above 0℃, mainly for cooling, and also for heating. The terminal is mainly fan coils, without floor heating or radiators.

Advantages of air source heat pumps compared to central air conditioners

1. High efficiency and energy saving

Generally, when the central air conditioner is at -5℃, the energy efficiency will be reduced and electric auxiliary heating will be required. The main reason is that the general compressor used by the central air conditioner has a low compression ratio. When the temperature drops to a certain level, the compressor cannot work and the heating cannot be stable. At this time, the central air conditioner not only has a poor cooling effect, but also consumes a lot of electricity, which is difficult to meet the heating needs in the northern region; while the air source heat pump is mainly aimed at the heating areas in the northern region with severe winters. It uses a special compressor for heat pumps, which can be suitable for lower ambient temperatures. When the outdoor temperature is -20℃, the heating supply is not reduced, and it can still work normally even at an ultra-low temperature of -40℃.

In a better case, its COP can reach 1:4 (simply put, every 1 kilowatt-hour of electricity can generate 4 kilowatt-hours of heat energy), and it can also reach 2-3 under normal circumstances. The energy saving effect is very significant. Its method of using mechanical energy to convert low-temperature heat energy into high-temperature heat energy has an energy efficiency that is always greater than 1, which is the best way to save energy.

2. Good comfort

In addition, in addition to being able to cool and heat through fan coils like central air conditioners, air source heat pumps can also be connected with floor heating and radiators. This water circulation heating method is not available in central air conditioners, and is also recognized as the most energy-saving heating method for air source heat pumps (floor heating has low water temperature requirements and requires less heat to achieve the same effect). Heat radiates from the feet upwards, dissipates evenly, and there is no wind feeling. The room is warm at the bottom and cool at the top, which feels the most comfortable. The central air conditioner's heating method of blowing from the head down will cause a heat dryness effect, which will take away the moisture in the room and on the human body, and it is easy to get air conditioning disease.

3. Environmental protection and safety

Air source heat pumps do not require non-renewable energy such as coal, gas and fuel oil. They mainly use the heat stored in the air to generate heat energy, which is clean and environmentally friendly. Air source heat pump units will not cause other air pollutants when used, and the entire operation process is truly zero pollution. Air source heat pumps have a wide range of applications. At present, domestic heat pump technology and products are widely used, and their diversity has ranked first in the world. It covers domestic and commercial hot water, heating and cooling, constant temperature greenhouses, drying, high-temperature heat pumps, special industrial air source heat pumps, constant temperature storage and other fields. It is widely used in hotels, shopping malls, swimming pools, hospitals and schools, central heating, rural "coal to electricity", breeding and slaughtering and other industries, covering a market demand of over one trillion yuan.