Abstract: An air conditioning system comprises one or more air conditioners through which refrigerant circulates, and a first controller. For each of one or more indoor units, a score corresponding to a cost of using the indoor unit is preset. The first controller calculates, for each of the one or more air conditioners, a first total value of a score of each of the one or more indoor units included in the air conditioner. The first controller calculates a second total value of the first total value of each of the one or more air conditioners. When an electrical energy limit condition is satisfied, the first controller sets for each of the one or more air conditioners a drive frequency for a compressor included in the air conditioner according to a ratio of the first total value of the air conditioner to the second total value.

Abstract: A heat exchanger includes a plurality of fins spaced apart from one another in a first direction and a plurality of heat transfer tubes penetrating through the plurality of fins, the plurality of heat transfer tubes being spaced apart from one another in a second direction crossing the first direction. Each of the plurality of fins includes a fin base surface that is flat and a plurality of fin projections. The plurality of fin projections include inner fin projections provided to separately surround each of the plurality of heat transfer tubes, the inner fin projections protruding in the first direction from the fin base surface, and outer fin projections provided to separately surround each of the inner fin projections, the outer fin projections protruding in the first direction from the fin base surface.

Abstract: A distributor includes at least: a first flow path through which refrigerant flowing in from a refrigerant inflow unit flows in a first direction toward a heat transfer tube disposed on the side of a refrigerant outflow unit; two second flow paths branched from the first flow path; two third flow paths, through each of which the refrigerant flows in a second direction opposite to the first direction; two fourth flow paths, each of which is formed to protrude from a main body toward the second direction and through each of which the refrigerant flows in a third direction intersecting the two third flow paths; and two fifth flow paths, through each of which the refrigerant flows in the first direction.

Abstract: A heat exchanger includes: a heat exchange module including fins and heat transfer pipes; and a refrigerant distributor connected to an end portion of the heat exchange module. The refrigerant distributor includes: one or more distributors including a first inlet and first outlets, and configured to cause the refrigerant that flows from the first inlet into the one or more distributors to branch into refrigerant streams, and cause each of the refrigerant streams to flow out from an associated one of the first outlets; and a communication header including a second inlet and second outlets with which some others of the heat transfer pipes are connected, and configured to cause the refrigerant that flows from the second inlet to branch into refrigerant streams, and cause each of the refrigerant streams to flow out from an associated one of the second outlets.

Abstract: An air-conditioning apparatus includes an outdoor unit and a relay unit. The outdoor unit includes a compressor compressing and discharging refrigerant and a heat-source-side heat exchanger performing heat exchange between the refrigerant and outside air. The relay unit and the outdoor unit forms a refrigerant circuit. The outdoor unit includes first and flow switching devices each switching an associated flow passage for the refrigerant between a plurality of flow passages, according to an operation mode. An outflow pipe and an inflow pipe through which refrigerant flows from the outdoor unit to the relay unit and from the relay unit into the outdoor unit, respectively, are between the outdoor unit and the relay unit. The first flow switching device is connected to the compressor, the second flow switching device, and the outflow pipe. The second flow switching device is connected to the first flow switching device and the inflow pipe.

Abstract: A refrigerant distributor in which a refrigerant pipe and a plurality of heat transfer tubes are connected causes refrigerant to be distributed to the plurality of the heat transfer tubes and includes a first plate-like member, a second plate-like member and a third plate-like member arranged in a first direction, the first plate-like member being a member to which the refrigerant pipe is connected and the third plate-like member being a member to which the plurality of the heat transfer tubes are connected. The first plate-like member includes an inflow passage, and a plurality of return flow passages. The second plate-like member includes a plurality of through passages. The third plate-like member includes a plurality of projections. The plurality of the projections each have, in its inside, a space that is communicated with the plurality of the through passages.

Abstract: A refrigerant distributor includes: an outer tube to which a heat transfer tube is connected; and an inner tube accommodated in the outer tube and having a dispersion hole that allows refrigerant to flow to the outer tube. The inner tube has an inner wall on which a projection is formed to extend in an extending direction of the inner tube. A plurality of projections including the projection are formed on the inner wall of the inner tube and arranged in a circumferential direction of the inner tube.

Abstract: A refrigeration cycle apparatus includes a compressor, a first heat exchanger, an expansion valve in which refrigerant flows from the first heat exchanger, a second heat exchanger having a plurality of heat transfer tubes and a header, a first refrigerant pipe connecting the expansion valve with a refrigerant inlet of the header, a second refrigerant pipe connecting the second heat exchanger with a refrigerant suction inlet of the compressor, a bypass circuit having a bypass inlet connected to the header at a position different from that of the refrigerant inlet of the header and a bypass outlet connected to the second refrigerant pipe, a bypass valve configured to make a pressure of the refrigerant in the bypass circuit lower than a pressure of the refrigerant in the header, and a refrigerant circuit auxiliary unit configured to deliver gas-phase refrigerant from the bypass circuit to the bypass outlet.

Abstract: A refrigeration cycle apparatus includes: a first heat exchanger including heat transfer tubes and a first header configured to distribute refrigerant to the heat transfer tubes; a gas-liquid separator configured to separate the refrigerant that flows into the first heat exchanger into gas refrigerant and liquid refrigerant; a gas bypass circuit configured to cause the gas refrigerant to flow from the gas-liquid separator into the first header; a liquid bypass circuit configured to cause the liquid refrigerant to flow from the gas-liquid separator into the first header; and a bypass valve provided at at least one of the gas bypass circuit and the liquid bypass circuit. The gas bypass circuit is connected to the first header at a position which is located downward of a position where the liquid bypass circuit is connected to the first header, in a flow direction of the liquid refrigerant in the first header.

Abstract: A flow switching device is provided at a refrigeration cycle apparatus. The flow switching device includes a plurality of plates; and a first inlet, a second inlet and a flow passage connecting between the first inlet and the second inlet. The flow passage have an anisotropic flow passage configured to have a forward flow resistance for a forward flow, the forward flow being a refrigerant flow from the first inlet to the second inlet, and a backward flow resistance for an inverse flow, the inverse flow being a refrigerant flow from the second inlet to the first inlet, the forward flow resistance being different from the backward flow resistance. A part of the anisotropic flow passage is at a plate, on which neither the first inlet nor the second the inlet is formed, of the plurality of plates.

Abstract: An air conditioning device has: a refrigerant circuit that includes a compressor, a switching valve, a cascade heat exchanger, an expansion valve and an outdoor heat exchanger connected to one another by a first pipe through which a refrigerant flows, and that performs a defrosting operation in which the refrigerant discharged from the compressor is introduced into the outdoor heat exchanger; a heat-transfer medium circuit that includes a pump, the cascade heat exchanger, and the indoor heat exchanger connected to one another by a second pipe through which a heat-transfer medium flows; and a control device that controls the compressor and the pump. When an amount of heat storage of the heat-transfer medium is less than a threshold, the control device reduces the heating capability of the indoor heat exchanger when the air conditioning device transitions from a heating operation to the defrosting operation.

Abstract: An outdoor heat exchanger includes: a group of windward flat tubes, a group of leeward flat tubes and a distributor. When the outdoor heat exchanger acts as an evaporator, the refrigerant flows through the plurality of second flat tubes, the plurality of fourth flat tubes, the plurality of third flat tubes, and the plurality of first flat tubes in this order, and when the outdoor heat exchanger acts as a condenser, the refrigerant flows through the plurality of first flat tubes, the plurality of third flat tubes, the plurality of fourth flat tubes, and the plurality of second flat tubes in this order.

Abstract: A heat exchanger includes: a fin extending in a widthwise direction along an air flow direction and extending in a longitudinal direction crossing the air flow direction; and a heat transfer tube passing through the fin. The fin has a through hole. The heat transfer tube is inserted into the through hole. Each fin includes a planar portion, and a first protruding portion and a second protruding portion protruding from the planar portion. The first protruding portion is curved along the longitudinal direction. The second protruding portion has an extending portion extending in the longitudinal direction. The extending portion is located to overlap a center of the through hole in the widthwise direction.

Abstract: A heat exchanger includes a first heat exchange portion and a second heat exchange portion. The first heat exchange portion includes a plurality of first flat tubes. The second heat exchange portion includes a plurality of second flat tubes. The heat exchanger further includes: a first header; a second header; and a third header connected to each of the first flat tubes and each of the second flat tubes. The third header includes: a first plate provided with a plurality of first insertion holes through which the second ends of the first flat tubes are respectively inserted and a plurality of second insertion holes through which the second ends of the second flat tubes are respectively inserted; and a second plate provided with a plurality of communication spaces each communicating with a corresponding one of the first insertion holes and a corresponding one of the second insertion holes.

Abstract: A heat exchanger includes: a fin extending in a widthwise direction along an air flow direction and extending in a longitudinal direction crossing the air flow direction; and a heat transfer tubepassing through the fin. The fin has a through hole. The fin includes a planar portion, and a first protruding portion, a second protruding portion and a third protruding portion protruding from the planar portion. The first protruding portion is curved along the longitudinal direction. The second protruding portion is located between the first protruding portion and the through hole and surrounds the through hole. The third protruding portion extends linearly in the longitudinal direction and is located on a leeward side relative to the first protruding portion and the second protruding portion in the air flow direction.

Abstract: A distributor includes at least: a first flow path through which refrigerant flowing in from a refrigerant inflow unit flows in a first direction toward a heat transfer tube disposed on the side of a refrigerant outflow unit; two second flow paths branched from the first flow path; two third flow paths, through each of which the refrigerant flows in a second direction opposite to the first direction; two fourth flow paths, each of which is formed to protrude from a main body toward the second direction and through each of which the refrigerant flows in a third direction intersecting the two third flow paths; and two fifth flow paths, through each of which the refrigerant flows in the first direction.

Abstract: A heat exchanger includes: a fin extending in a widthwise direction along an air flow direction and extending in a longitudinal direction crossing the air flow direction; and a heat transfer tube passing through the fin. The fin includes a planar portion, and a plurality of first protruding portions and a plurality of second protruding portions that protrude from the planar portion. The plurality of first protruding portions include a first projection curved downward in the longitudinal direction, and a second projection curved upward in the longitudinal direction. Each of the plurality of second protruding portions surrounds a corresponding one of the plurality of through holes. A vertex of the first projection and a vertex of the second projection are located at the same position in the widthwise direction.

Abstract: A refrigerant distributer includes a plurality of plates. The refrigerant distributer is configured to divert, into a plurality of refrigerant flows, refrigerant flowing in from one or a plurality of inlet ports thereof and allow the refrigerant flows to be let out from a plurality of outlet ports thereof spaced from one another in a first direction. The plurality of plates include: an inflow plate having one of the plurality of inlet ports; a communication plate having a communication chamber communicating with the one of the plurality of inlet ports of the inflow plate; and a heat transfer tube insertion plate into which a heat transfer tube communicating with one of the plurality of outlet ports is inserted, the heat transfer tube insertion plate having heat transfer tube insertion space through which a plurality of the heat transfer tubes communicate with the communication chamber.

Abstract: A heat exchanger includes: a heat exchange portion in which a plurality of heat transfer tubes, in which refrigerant flows, are arranged in a height direction and grouped into, in order from an upper side in the height direction, a main, first auxiliary and second auxiliary heat exchange portion and configured to, when the heat exchanger serves as a condenser, allow the refrigerant to flow through the heat exchanger in order of the main heat exchange portion of the airflow downstream side row, the main heat exchange portion of the airflow upstream side row, the first auxiliary heat exchange portion of the airflow upstream side row, the first auxiliary heat exchange portion of the airflow downstream side row, the second auxiliary heat exchange portion of the airflow downstream side row, and the second auxiliary heat exchange portion of the airflow upstream side row, and flow out of the heat exchanger.

Abstract: An air conditioning system comprises one or more air conditioners through which refrigerant circulates, and a first controller. For each of one or more indoor units, a score corresponding to a cost of using the indoor unit is preset. The first controller calculates, for each of the one or more air conditioners, a first total value of a score of each of the one or more indoor units included in the air conditioner. The first controller calculates a second total value of the first total value of each of the one or more air conditioners. When an electrical energy limit condition is satisfied, the first controller sets for each of the one or more air conditioners a drive frequency for a compressor included in the air conditioner according to a ratio of the first total value of the air conditioner to the second total value.