air to water heat-pump for low-temperature weather

As an energy-saving and environment-friendly product, the air-source heat pump has been widely applied both at home and aboard. However, since the heat-intake end of the air-source heat pump is placed in the air, its application is limited by the ambient temperatures outdoors. In cold northern areas, the application of normal air-source heat pumps is faced with a series of problems: 1) When the outdoor ambient temperature falls, the heating capacity of the set also falls quickly. But the heat load of the building rises quickly with the dropping outdoor temperature. When the outdoor ambient temperature reaches a really low level, the heating capacity of the set will no longer to meet the heating demand in such regions in winter. 2) With the falling outdoor ambient temperature, the pressure ratio of the compressor will increase and cause the exhaust temperature to rise continuously and the COP of the set falls sharply. In this case the compressor will automatically stop to prevent overheat. In additional, the lubricating oil will generally become viscous with the falling temperature, making it difficult for the system to return oil and leading to poor lubrication. 3) The low temperature will add to the time needed for defrosting. Therefore special methods shall be considered for drainage of water generated in defrosting. Otherwise this water may be iced at the bottom of the outdoor evaporator and, in worst cases, stall and damage the fan.These problems, however, can be solved with our Dismy Heat-pump Wall-mounted Furnace containing the latest low-temperature enthalpy-added technology, so that air-source heat pumps can be used for heating even in cold regions. The most advanced low-temperatures enthalpy-added technology and heat-gas defrosting technologies are adopted for r Dismy Heat-pump Wall-mounted Furnace. They not only solve the low-temperatures startup and heating problems of the compressor but also solve the frosting problem under low temperatures. With these technologies, the system can work safely, stably, and reliably in cold regions on a long-term basis. The low-temperatures weather-proof air-source heat pump can provide high performance even under -25 with its COP being up to more than 2.0. It costs only half as boilers in winter. The maximum temperature of outgoing water can reach up to 60, which totally meets the heating requirements of floors and heat radiators. It is especially suitable for floor heating. Combined with floor heating, it evens the temperature on the indoor ground. The temperatures increases progressively from top to bottom, making you feel warm at the feet and cool at the head. This good feeling is best suits the heating demand of the human body. While working, it neither causes substantial dust flow like air conditioners running in the heating mode, nor cause great evaporation in the room like heat radiators do. It is free of combustion and therefore discharges no flue gas. It is free of noise and lift, making it easier to keep the room clean and healthful. In humid areas is can be used to prevent all kinds of rheumatic diseases and preserve health. And infants and children could play all over the floor to live a healthy and lively childhood.