What is the difference between ultra-low temperature air source heat pump and ordinary air source heat pump?

Two or three years ago, most people didn’t know about air source heat pump products. If they were a little bit impressed, they might be air source water heaters. They didn’t know about other products, such as air source floor heating and air conditioning integrated machines and air source heat pump drying. Dryer and so on. Driven by the popularization of "coal-to-electricity" in northern China, most people know what air-source heat pumps are. Today, Leomon will share with you what is the difference between ultra-low temperature air-source heat pumps used in the north and ordinary air-source heat pumps?

1. The two operating conditions are different

We all know that the working principle of an air source heat pump is to absorb heat from the air through the compressor to convert it into usable high heat energy, and then exchange it with the water system to provide hot water, heating, cooling, drying and other purposes.

1. The operating temperature range is different
Ultra-low temperature air source heat pump can be used normally above -25℃; conventional air source heat pump can be used above -5℃.

2. Different energy efficiency
The heating efficiency of ultra-low temperature air source heat pumps at low temperatures is 30% higher than that of conventional heat pumps, and the comprehensive energy efficiency ratio at -20°C is about 1.8; when used at low temperatures, it is more energy-efficient than conventional heat pumps.

3. The defrosting ability of the unit is different
Frequent rain and snow weather and low temperature tend to weaken the defrosting capacity of the unit. Because the unit's suction is too small, the air density that can be inhaled decreases. As time accumulates, the frost layer becomes thicker. Therefore, due to the decrease in air conversion capacity, the circulation of refrigerant will decrease, and the overall heating capacity will decrease.

2. The technologies involved in the two are different

With the development of air source heat pumps, its technology has become increasingly mature, and soon air source heat pump heating also gained a foothold in northern China. So what kind of technology does the low temperature air source heat pump have to gain a foothold in the cold regions of northern China? There are three main points:

1. Ultra-low temperature air source operation technology
As the air source heat pump host is generally installed outdoors, frost will frequently occur in rain and snow. The ultra-low temperature air source heat pump host can intelligently judge the demand for defrosting. According to the operating conditions of the unit (operating time, exhaust temperature, etc.), combined with ambient temperature and frost thickness, it can intelligently determine whether to defrost, so as to achieve defrost with frost, no frost In addition, the defrosting cycle is greatly extended, the defrosting time is shortened by 20%, and the efficient operation of the unit is ensured.

2. Jet enthalpy technology
Because the heating efficiency of the air source heat pump in extreme cold weather will be greatly attenuated, resulting in unsatisfactory heating effect, the ultra-low temperature air source heat pump uses the jet enthalpy technology to create a two suction port in the scroll, through the second suction circuit, increase The refrigerant flow rate increases the circulation of the unit during refrigeration, and increases the refrigeration capacity by 10% compared with the general unit, greatly improves the refrigerant circulation system, makes full use of the refrigerant flow and utilization in the compressor, and improves the stability of the system operation and heating efficiency .

3. Heat exchanger
Ordinary air source heat pumps use plate heat exchangers, which are easy to foul and block the flow path. Low temperature air source heat pumps can use internally threaded external finned copper tubes. Water flows inside the tubes and fluorine flows outside the tubes. The heat exchange area is large and the heat exchange efficiency is high.

In general, everyone still has to choose the right air source heat pump according to their own needs and the local temperature environment. If you are not sure, you can ask the sales staff to make a plan for you. Compare more