Variable-flow single-working medium cascade heat pump system with parallel heat exchangers
A heat pump system and heat exchanger technology, which is applied to compressors with cascade work, fluid circulation arrangements, lighting and heating equipment, etc. The effect of inter-stage energy regulation, simple system structure and high efficiency
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[0024] figure 1 It is a schematic diagram of a cascaded heat pump system with a variable flow single working medium in parallel connection of the first heat exchanger and the second heat exchanger of the present invention, including multiple sets of compressor units connected in parallel, a condensing evaporator 6, a first throttle valve 5-1 and The second throttle valve 5-2, each group of compressors includes a compressor 1, a four-way reversing valve 2, a first solenoid valve 3-1, a second solenoid valve 3-2, a third solenoid valve 3-3, and a second solenoid valve 3-3. Four solenoid valves 3-4, the first heat exchanger 4, and the second heat exchanger 7, the exhaust end of the compressor 1 is connected to the first interface 2-1 of the four-way reversing valve, and the compressor suction connected to the third port 2-3 of the four-way reversing valve, and the first solenoid valve 3-1 is connected in parallel with the second solenoid valve 3-2 to the second port of the four-w...
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