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.

A multi-split air-conditioner and an outdoor unit system thereof are provided. The outdoor unit system includes: a compressor (1) having a gas outlet (a) and a gas inlet (b); an outdoor heat exchanger (2) having an inlet (c) and an outlet (d); a switching assembly (3) having first to sixth ports, wherein the first port (e) is connected with the gas outlet (a) of the compressor (1), the second port (f) is connected with the gas inlet (b) of the compressor (1), the third port (g) is connected with the inlet (c) of the outdoor heat exchanger (2), the fourth port (h) is connected with the outlet (d) of the outdoor heat exchanger (2), the fifth port (i) is connected with an inlet pipe (4) and the sixth port (j) is connected with an outlet pipe (5).

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.

A refrigeration cycle apparatus includes a heat exchanger, and a flow switching circuit configured to switch the heat exchanger to act as any one of an evaporator and a condenser, the flow switching circuit is configured to allow refrigerant to flow into the heat exchanger in the same direction both in a case where the heat exchanger acts as an evaporator and in a case where the heat exchanger acts as a condenser, the heat exchanger includes a path switching circuit including a plurality of paths, and the path switching circuit is configured to switch an order of the plurality of paths through which refrigerant flows between an order of the plurality of paths in the case where the heat exchanger acts as an evaporator and another order of the plurality of paths in the case where the heat exchanger acts as a condenser.

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).

An energy efficient heat pump for a heating, ventilation, and air conditioning (HVAC) system includes a vapor compression circuit, a first heat exchanger of the vapor compression circuit configured to place a working fluid in a first heat exchange relationship with a first air flow directed across the first heat exchanger, a second heat exchanger of the vapor compression circuit configured to place the working fluid in a second heat exchange relationship with a second air flow directed across the second heat exchanger, and a valve system of the vapor compression circuit. The valve system is adjustable between a first configuration and a second configuration, the heat pump is configured to operate in a cooling mode with the valve system in the first configuration, the heat pump is configured to operate in a heating mode with the valve system in the second configuration, and the valve system is configured to direct the working fluid into the first heat exchanger to place the working fluid in a counterflow heat transfer arrangement with the first air flow directed across the first heat exchanger in the first configuration and in the second configuration.

A six-way directional valve (100), an outdoor unit (1000) having the same and an air conditioner are provided. The six-way directional valve (100) includes: a valve body (1), defining a valve cavity (5) therein, the valve cavity (5) having a first side wall (11) and a second side wall (12) disposed oppositely to each other, the valve body (1) being provided with a first connecting pipe (A) to a sixth connecting pipe (F); a valve spool (2), movably disposed in the valve cavity (5), a first chamber (21) being defined between the valve spool (2) and the first side wall (11), a second chamber (22) being defined between the valve spool (2) and the second side wall (12), and a third chamber (23) being defined between the valve spool (2), the first side wall (11) and the second side wall (12); and a pilot valve assembly (4).

A refrigeration cycle apparatus includes a heat source unit, a plurality of indoor units, and a branch unit configured to transfer refrigerant. The branch unit includes a plurality of six-way valves each being provided for a corresponding one of the plurality of indoor units. Each of the six-way valves includes a housing having a first port to a sixth port, and a valve body disposed inside the housing and provided with a first flow path and a second flow path. In a second switching state, the first port communicates with the second port through the first flow path, and the fourth port communicates with the fifth port through the second flow path. In a first switching state, the second port communicates with the third port through the first flow path, and the fifth port communicates with the sixth port through the second flow path.

An air conditioner has a refrigerant circuit and a blower. A refrigerant flow path switching mechanism is configured to switch to a first switching state to allow refrigerant to flow through a reheater, a second expansion valve, and a cooler in this order in a refrigerant circuit. The refrigerant flow path switching mechanism is configured to switch to a second switching state to allow refrigerant to flow through the reheater, the second 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.

A heat-pump system is provided that includes an outdoor heat exchanger, an expansion device, an indoor heat exchanger, a compressor, and a multiway valve. The expansion device is in fluid communication with the outdoor heat exchanger. The indoor heat exchanger is in fluid communication with the expansion device. The compressor circulates working fluid through the indoor and outdoor heat exchangers. The multiway valve is movable between a first position corresponding to a cooling mode of the heat-pump system and a second position corresponding to a heating mode of the heat-pump system. The working fluid flows in the same direction through the outdoor heat exchanger in the cooling mode and in the heating mode, and the working fluid flows in the same direction through the indoor heat exchanger in the cooling mode and in the heating mode.