Falling film evaporation heat pump unit

By employing a falling film evaporative heat pump unit and an automatic solution concentration system in the air source heat pump, the problems of frost formation and antifreeze dilution in winter have been solved, achieving frost-free continuous heating and improved energy efficiency.

CN122191838APending Publication Date: 2026-06-12HUIPU SCI & TECH HENAN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUIPU SCI & TECH HENAN
Filing Date
2026-04-30
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Air source heat pumps are prone to frost formation on heat exchangers in low-temperature and high-humidity winter environments, leading to heating interruptions. Existing antifreeze spray systems also suffer from problems such as solution ineffectiveness due to water absorption and dilution, and excessive energy consumption for concentration.

Method used

The falling film evaporative heat pump unit uses a solution spraying device above the coil heat exchanger to form a solution film. The high-temperature gaseous refrigerant at the exhaust end of the magnetic levitation compressor heats the concentration device, thereby achieving automatic concentration and regeneration of the antifreeze solution, avoiding frost formation and improving heat exchange efficiency.

Benefits of technology

It achieves frost-free continuous operation in low temperature and high humidity environments, reducing energy consumption and improving heat exchange efficiency and system energy efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of heat pumps and heating, ventilation and air conditioning, and discloses a falling-film evaporation type heat pump unit which comprises a magnetic suspension compressor, the magnetic suspension compressor, a disc tube type heat exchanger and a shell tube type heat exchanger are sequentially connected to form a refrigerant circulation loop, a solution spraying device is arranged above the disc tube type heat exchanger, a fan is arranged at the top of the solution spraying device, the solution spraying device is connected with a water storage pool through a solution spraying pump, the water storage pool is sequentially connected with a concentrated solution pump and a concentration device through an electric valve, and the outlet of the concentration device is connected with the water storage pool. When heating, the falling-film evaporation type heat pump unit sprays anti-freezing solution to the heat exchanger to form a liquid film, frost formation is avoided, and continuous heating is realized; when the solution absorbs water and becomes dilute, the dilute solution is automatically extracted to the concentration device, and the exhaust heat of the compressor is used to heat and remove water, and then the solution is returned. The structure ensures stable operation of the unit under low temperature and high humidity, recovers waste heat, reduces the concentration energy consumption, and improves the overall energy efficiency of the unit.
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