An air-conditioning outdoor unit (1000) and an air conditioner are provided, the air-conditioning outdoor unit (1000) including: a compressor (400) having an air exhaust port (401) and an air return port (402); a six-way directional valve (100) including a valve body (1), a valve spool (2) and a pilot valve assembly (5), the valve body (1) defining a valve cavity (4) therein and being provided with a first connecting pipe (11), a second connecting pipe (12), a third connecting pipe (13), a fourth connecting pipe (14), a fifth connecting pipe (15) and a sixth connecting pipe (16), the valve spool (2) being movably disposed in the valve cavity (4), two valve chambers (3) being defined between two moving ends of the valve spool (2) and an inner circumferential wall of the valve cavity (4) so that the valve spool (2) is moved by a pressure difference between the two valve chambers (3); and an outdoor heat exchanger (500).

A six-way directional valve (100) is provided, including: a valve body (1), defining a valve cavity (4) therein, and provided with a first connecting pipe to a sixth connecting pipe (11-16); a valve spool (2), movably disposed in the valve cavity (4), two valve chambers (3) being defined between two moving ends of the valve spool (2) and an inner circumferential wall of the valve cavity (4), so that the valve spool (2) being allowed to be driven to move by a pressure difference between the two valve chambers (3), a first chamber (21) and a second chamber (22) being defined between the valve spool (2) and a same side wall of the valve cavity (4), a third chamber (23) being defined between the valve spool (2) and the inner circumferential wall of the valve cavity (4); and a pilot valve assembly (5).

A heat pump system is provided. The heat pump system comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger and a six-way valve. The compressor comprises a fluid suction port and a fluid discharge port. The first heat exchanger is arranged in a first circulation path, the second heat exchanger is arranged in a second circulation path, and the third heat exchanger is arranged in a third circulation path, wherein the first circulation path, the second circulation path and the third circulation path are parallel paths. A first end of the first circulation path, a first end of the second circulation path and a first end of the third circulation path are connected to the six-way valve and are in controllable communication with the fluid suction port and the fluid discharge port of the compressor by means of the six-way valve. A second end of the first circulation path, a second end of the second circulation path and a second end of the third circulation path are connected to a common path converging point. The components of the heat pump system in the present application have simple pipelines, have a high degree of integration, are not difficult to mount, and have a small pressure drop during fluid suction and discharge, and the control logic therefor is simple.

A heating, ventilation, and/or air conditioning (HVAC) system includes a reversible valve having an outlet configured to direct refrigerant to a reheat heat exchanger of the HVAC system. The reversible valve is further configured to be in a first configuration to direct the refrigerant through a refrigerant circuit in a first flow direction in a heating mode of the HVAC system and to be in a second configuration to direct the refrigerant through the refrigerant circuit in a second flow direction in a cooling mode of the HVAC system.

An air conditioner includes a refrigerant circuit and a blower. A refrigerant flow path switching mechanism is configured to be switched to a first switching state to allow refrigerant to flow through a reheater, a first expansion valve, and a cooler in this order in the refrigerant circuit. The refrigerant flow path switching mechanism is configured to be switched to a second switching state to allow the refrigerant to flow through the reheater, the first expansion valve, and the cooler in this order in the refrigerant circuit. The reheater and the cooler are configured to allow air blown by the blower to pass through the cooler and then pass through the reheater during either of the first switching state and the second switching state.

There is provided a valve for a reversible heat pump system, including six ports and three flow paths for a refrigerant, the three flow paths being selectable between different pairs of the six ports, wherein: two of the three flow paths are non-restrictive flow paths; and one of the three flow paths is a restrictive flow path. There is also provided a reversible heat pump system, including: the valve; a compressor; a process heat exchanger having input and output sides through which refrigerant is supplied and discharged respectively; and a rejection heat exchanger having input and output sides through which the refrigerant is supplied and discharged respectively, wherein the valve interconnects the compressor, the process heat exchanger and the rejection heat exchanger such that a refrigeration cycle can be established.

A refrigeration cycle apparatus includes a heat source side unit, a relay unit, and a plurality of load side units, the heat source side unit and the relay unit are connected by using a low-pressure pipe and a high-pressure pipe, and the relay unit and each of the plurality of load side units are connected by using a corresponding liquid branch pipe and a corresponding gas branch pipe. The heat source side unit includes a compressor configured to compress refrigerant, at least one flow switching valve configured to change a passage of refrigerant based on an operation mode, and at least one heat source side heat exchanger, and the relay unit includes six-way valves or pairs of four-way valves.