Traditional defrosting methods applied to solve frosting problems of air-source heat pumps operating in cold periods may reduce heat capacity of the system and decrease indoor thermal comfort. In order to improve the performance of air-source heat pump (ASHP) and maintain indoor temperature in defrosting conditions. an air-source heat pump combined with a refrigerant direct-condensati... https://www.simaxsporets.shop/product-category/adidas-performance-shirts/