Water source heat pump units use water circulating in common pipelines, water drawn from wells, lakes or rivers, or water circulating in underground coils as cold and hot sources to produce cold and hot air or hot and cold water; they include a user-side heat exchange device, a compressor, and a heat source-side heat exchange device, and have single cooling or cooling and heating functions. According to the different forms of the compressor, they can be divided into: open heat pump units, vortex heat pump chillers, and screw heat pump chillers.
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