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Reversing (4-way) Valve. Expansion Valve. Q out. Q in. Condenser. Evaporator. Condenser. Evaporator. Q in. Q out. Compressor. Refrigeration (Air-Conditioning) Mode. Heat Pump Mode.
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Reversing (4-way) Valve Expansion Valve Qout Qin Condenser Evaporator Condenser Evaporator Qin Qout Compressor Refrigeration (Air-Conditioning) Mode Heat Pump Mode