A waste heat recovery multi-heat source composite heat pump water supply system

Abstract

The invention discloses a waste heat recovery multiple-heat-source composite type heat pump hot water supply system. The system comprises a solar heat collection water supply system, a waste heat auxiliary system and an air source heat pump water supply system. The solar heat collection water supply system at least comprises a vacuum tube heat collector and a small water tank to constitute a main direct water supply pipeline, and then the solar heat collection water supply system and a plate-fin heat exchanger constitute an auxiliary heating circuit, so that heat exchanger defrosting is achieved. The waste heat auxiliary system is at least connected with a double-pipe heat interchanger in series, a preheating heat pump system works, the inlet temperature of a compressor is increased, the working efficiency of the compressor is improved, then the waste heat auxiliary system and the plate-fin heat exchanger constitute a defrosting loop, and heat exchanger defrosting can be achieved under the empty-illumination condition at night or on cloudy days. The air source heat pump water supply system at least comprises a compressor, a condenser, a liquid storage device, a dry filter, an expansion valve, a finned heat exchanger, a double-pipe heat exchanger and a gas-liquid separator and is used for absorbing air energy and heating cold water so that the water can be directly supplied to users. System valves control all the subsystems to be opened and closed, all-weather operation of the system can be achieved without season limitations, and the working temperature is lower than -10 DEG C.

Description

technical field [0001] The invention relates to a waste heat recovery type multi-heat source composite heat pump hot water supply system. Background technique [0002] China's current resource utilization rate is low, carbon emissions have risen linearly with economic development, and the problems of environmental pollution and resource shortage have become prominent. In the face of increasingly serious energy problems, in the national "Twelfth Five-Year Plan", the idea of ​​energy development was put forward, emphasizing green development and building a resource-saving and environment-friendly society. The research on comprehensive utilization technology of solar energy and other renewable energy and the research and development of related equipment are important measures to achieve the goal of energy saving and consumption reduction. Effective collection of solar radiant energy, used for power generation, heating or cooling of rooms, will greatly reduce the energy consump...

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Problems solved by technology

[0004] In order to overcome the poor seasonal adaptability of the existing hot water supply device, the limited temperature range of working conditions, and the inability to adapt to the lower outdoor temperature in winter, the present invention provides a waste heat recovery type multi-heat source compound heat pump water supply system, which uses solar energy , waste heat and air source heat pump complement each other, can realize all-weather operation without seasonal restrictions, even if the working temperature is as low as -10 ℃, it can also ensure the efficient operation of the system

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