The unit is equipped with a high-quality 480-level precision-regulated electronic expansion valve, which is dynamically matched in real-time according to the load demand of the terminal system operation and precisely adjusts the opening degree of the electronic expansion valve to fully enhance the best performance of each component in the system, so that the unit can run stably at any load, automatically adapt to the changing plateau environment temperature and completely solve the oscillation problem of the system.

The frost period in Lhasa can be as early as August each year and last up to the end of June in the following year. The use of heat pumps for heating requires units with reliable defrost functions and the ability to avoid water temperature fluctuations that cause heat pumps blowing cold air in winter.

According to the difference between the evaporating temperature and outdoor ambient temperature and the rate of temperature difference changes during operation, Shenling heat pump determines the amount and speed of frosting of the unit, combined with the heating operation time, and accurately determines the defrosting entry point. Based on the defrosting time, evaporating temperature, and pressure during defrosting and water temperature parameters, the quality of defrosting is evaluated and the control parameters are revised in real-time through data analysis to obtain the best heating effect. Reduce the time to enter the defrost to ensure the heating effect when the humidity is high, and maximize the normal heating operation time when the humidity is low to reduce the water temperature fluctuations caused by defrosting.

Lhasa region is a highland temperate semi-arid monsoon climate, with low rainfall, and  March and April are the months of the year when dusty weather is most likely to occur.

 

 

 

 

 

 

The wind-side heat exchanger of the unit adopts a hydrophilic aluminum corrugated sheet with small incisions, which are not easy to accumulate dust and corrosion, are more adaptable to the dusty and sandy environment, and has a longer service life. The use of hydrophilic aluminum foil can increase the corrosion resistance, the condensate accumulated on the surface is evenly distributed on the surface to avoid the formation of water droplets in the heat exchanger between the aggregation of blockage, which affects the heat exchange conditions and thus improves the heat exchange rate. At the same time, it can also ensure that the condensed water is quickly discharged during defrosting to avoid freezing.

 

The annual sunshine time of “Sunshine City” Lhasa is more than 3000 hours (more than 1000 hours compared with Shanghai), coupled with the thin atmosphere and strong solar radiation, which brings severe challenges to the sunscreen and anti-aging ability of the unit.

 

Shenling Polestar low-temperature heat pump frame using galvanized sheet spray design, which enhances adhesion while improving corrosion resistance. It has strong exterior decoration, aging resistance, and other protective properties, and is more suitable for areas with strong ultraviolet radiation.

Shenling Polestar low-temperature air source heat pump has been used in a large number of winter heating areas in northeast China, north China, northwest China and other places around the world. It presents a case for us to show how do heat pumps work in cold weather and how cold can a heat pump work. Although many heat pump struggles in cold weather, Shenling Polestar commercial heat pump is still able to maximize heat pump efficiency in cold weather. Shenling heat pump technology continues to break through and innovate,  with wider product applicability. On the path of the low carbon strategy, it continues to contribute to the clean heating industry.