A chiller is provided that includes a deionization filter to remove ionic substances in cooling waters, and that is of such a small size as to save energy and costs. The chiller also includes cooling-water circuits, and a refrigeration circuit. The refrigeration circuit includes heat-exchange-path sections. The heat-exchange-path sections include respective heat exchangers. The cooling-water circuits and includes tanks, first supply lines, second supply lines, and return lines. The chiller includes a filtering line branching off from the second supply line of the cooling-water circuit and connected to the return line of the cooling-water circuit. The filtering line is provided with the deionization filter.

A system (20; 300) has: a compressor (22) having a suction port (40) and a discharge port (42); an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54); a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76); a first heat exchanger (24); an expansion device (28); and a second heat exchanger (26; 302). Conduits and valves are positioned to provide alternative operation in: a cooling mode; a first heating mode; and a second heating mode. In the cooling mode and second heating mode, a needle (60) of the ejector is closed.

A system (20; 300) has: a compressor (22) having a suction port (40) and a discharge port (42); an ejector (32) having a motive flow inlet (50), a suction flow inlet (52), and an outlet (54); a separator (34) having an inlet (72), a vapor outlet (74), and a liquid outlet (76); a first heat exchanger (24); an expansion device (28); and a second heat exchanger (26; 302). Conduits and valves are positioned to provide alternative operation in: a cooling mode; a first heating mode; and a second heating mode. In the cooling mode and second heating mode, a needle (60) of the ejector is closed.

Disclosed is an air conditioner. The air conditioner of the present disclosure for achieving the above or other object, there is provided an air conditioner including: a compressor which compresses refrigerant; an accumulator which supplies refrigerant to the compressor; a condenser which condenses refrigerant discharged from the compressor; an expansion valve which expands refrigerant passing through the condenser; an evaporator which has a heat exchange pipe through which refrigerant passing through the expansion valve flows, and evaporates refrigerant flowing through the heat exchange pipe; a gas-liquid separation pipe which connects a first point and a second point located between one end and the other end of the heat exchange pipe; and a bypass pipe which has one end connected to the gas-liquid separation pipe and the other end connected to the accumulator, wherein the gas-liquid separation pipe comprises: a first part which has one end connected to the first point and the other end connected to one end of the bypass pipe; and a second part which extends from the first part at between one end and the other end of the first part, and is connected to the second point.

A guide frame for a four-way reversing valve is provided. The guide frame includes a frame body. Both ends of the frame body are provided with a connecting portion, respectively. The connecting portion includes a first bending member and a second bending member, and the directions of bending of the first bending member and of the second bending member are opposite. The connecting portion is provided with a reinforcing member. The reinforcing member includes a first reinforcing plate and a second reinforcing plate. The first reinforcing plate is connected to the outer side of the first bending member by welding, and the second reinforcing plate is connected to the outer side of the second bending member by welding. Optionally, the first reinforcing plate is connected to the inner side of the first bending member by welding and the second reinforcing plate is connected to the inner side of the second bending member by welding. The connection strength of the connecting portion is increased, such that the guide frame is less likely to deform or break.

A flow path switching device of the present disclosure includes a case comprising a first nozzle into which fluid flows from an indoor unit, a second nozzle which sends fluid to the indoor unit, a plurality of inner outflow pipes through which fluid supplied from the first nozzle flows, a plurality of inner inflow pipes through which the fluid supplied to the second nozzle flows, and a flow path connection portion in which a space is formed to communicate the plurality of inner outflow pipes with the first nozzle or to communicate the plurality of inner inflow pipes with the second nozzle; a valve which is rotatably disposed in the space of the flow path connection portion, and has a first chamber connecting one of the plurality of inner inflow pipes and the first nozzle according to disposition, and a second chamber connecting one of the plurality of inner outflow pipes and the second nozzle according to disposition; and a motor which is disposed in one side of the valve, and rotates the valve, wherein the plurality of inner outflow pipes and the plurality of inner inflow pipes are disposed in the same one side direction of the flow path connection portion and are spaced apart from each other in a direction in which a rotation shaft around which the valve rotates is formed.

A flow path switching device of the present disclosure includes a case comprising a first nozzle into which fluid flows from an indoor unit, a second nozzle which sends fluid to the indoor unit, a plurality of inner outflow pipes through which fluid supplied from the first nozzle flows, a plurality of inner inflow pipes through which the fluid supplied to the second nozzle flows, and a flow path connection portion in which a space is formed to communicate the plurality of inner outflow pipes with the first nozzle or to communicate the plurality of inner inflow pipes with the second nozzle; a valve which is rotatably disposed in the space of the flow path connection portion, and has a first chamber connecting one of the plurality of inner inflow pipes and the first nozzle according to disposition, and a second chamber connecting one of the plurality of inner outflow pipes and the second nozzle according to disposition; and a motor which is disposed in one side of the valve, and rotates the valve, wherein the plurality of inner outflow pipes and the plurality of inner inflow pipes are disposed in the same one side direction of the flow path connection portion and are spaced apart from each other in a direction in which a rotation shaft around which the valve rotates is formed.

A heat pump system and control method thereof. The heat pump system includes: a main flow path with a compressor, a reversing valve, a first heat exchanger, a first throttling device and a second heat exchanger; the heat pump system further includes an ejector comprising a high-pressure fluid inlet, a fluid suction inlet and a fluid outlet, the high-pressure fluid inlet of the ejector is connected between the second heat exchanger and the first throttling device on the main flow path through a second throttling device, the fluid suction inlet of the ejector is connected to the reversing valve, and the fluid outlet of the ejector is connected to a separator, and a gas phase outlet of the separator is connected to the compressor, and a liquid phase outlet of the separator is connected between the first heat exchanger and the first throttling device on the main flow path.

Thermal management systems include an open-circuit refrigeration system featuring a receiver configurable to store a refrigerant fluid, an evaporator configurable to extract heat from a heat load when the heat load contacts the evaporator, and an exhaust line, where the receiver, the evaporator, and the exhaust line are connected to form a refrigerant fluid flow path, and a first control device configurable to control a vapor quality of the refrigerant fluid at an outlet of the evaporator along the refrigerant fluid flow path.

A thermal management system includes a refrigerant receiver having a refrigerant receiver outlet and a refrigerant receiver inlet, with the refrigerant receiver configured to store a refrigerant fluid, an ejector having a primary flow inlet coupled to receive the refrigerant fluid from the receiver, a secondary flow inlet and an outlet. The system also includes a liquid separator having an inlet, a vapor side outlet, and a liquid side outlet, an evaporator arrangement to extract heat from a heat load proximate or in contact with the evaporator arrangement, with the evaporator arrangement coupled to the ejector and the liquid separator, a closed-circuit refrigeration system having a closed-circuit fluid path including the refrigerant receiver, the evaporator arrangement, and the liquid separator, the closed-circuit refrigeration system configured to receive refrigerant fluid from the refrigerant receiver, and an open-circuit refrigeration system having an open-circuit fluid path that includes the receiver, the evaporator arrangement, and the liquid separator, that is configured to receive refrigerant fluid from the refrigerant receiver.