February 10, 2013
Air source heat pumps refer to mechanical equipment that uses artificial technology to convert low-temperature energy into high-temperature energy to achieve heating effects. Air source heat pumps absorb energy from low-temperature heat sources (such as ambient air), and then convert them into higher-temperature heat sources and release them into the required space.
Compared with other heaters, the main advantage of air source heat pumps is the convenience of obtaining heat sources. As long as there is appropriate installation space and the space has a good ability to obtain outdoor air, the building has the basic conditions for installing air source heat pumps.
The main disadvantages and solutions of air source heat pump heating are as follows:
1. The performance of air source heat pumps decreases as the outdoor temperature decreases. When the outdoor temperature drops below -10℃, it is generally necessary to defrost the evaporator of the auxiliary heating equipment. This process is relatively complicated and energy-consuming. However, domestic manufacturers have now gradually solved the problem through optimized defrosting cycle intelligent frost control, intelligent frost thickness detection sensor, special air heat exchanger form design and research on non-frost surface materials.
2. In order to adapt to the change of the outside temperature within the range of -10℃~5℃, the compressor needs to have good performance requirements within a wide range of compression ratios. The solution to this problem requires changing the air source heat pump circulation method, such as intermediate air supply, compressor series and parallel conversion, etc., which is expected to be solved in the next 10 to 20 years.
3. The end of the room air conditioner is hot air instead of a general heater, which will feel uncomfortable for people who are accustomed to conventional heating methods. This can be improved by combining user-type central air conditioning with floor heating, but the initial investment will increase.
