Abstract: A refrigeration cycle apparatus includes refrigerant circuits each configured to circulate a refrigerant of the same composition. The refrigerant circuit is provided with a radiator configured to condense the refrigerant to transfer heat to external fluid, and the refrigerant circuit is provided with a radiator configured to transfer heat to the external fluid while allowing the refrigerant to be maintained in a supercritical state. The radiator is arranged upstream of the radiator in a direction of a flow of the external fluid. A capacity of a refrigerant flow channel of the radiator is smaller than a capacity of a refrigerant flow channel of the radiator.

Abstract: A stacking-type header according to the present invention includes a plurality of first plates and a plurality of second plates stacked on one another and brazed together such that each of the plurality of second plates is disposed between adjoining two of the plurality of first plates. The plurality of first plates include a first end plate that is an outermost one of the plurality of first plates in a stacking direction of the plurality of first plates and that has a first through hole, and a second end plate that is another outermost one of the plurality of first plates in the stacking direction of the plurality of first plates and that has a plurality of second through holes. The plurality of first plates and the plurality of second plates have a communication hole that connects the first through hole of the first end plate and the plurality of second through holes of the second end plate. The plurality of second plates each have at least one opening formed at other than the communication hole.

Abstract: In a heat exchanger, a first heat exchange unit is formed by curving a third heat exchange unit having a planar shape through L-shape bending, and a second heat exchange unit is formed by curving a fourth heat exchange unit having a planar shape through the L-shape bending, independently of the third heat exchange unit. The first heat exchange unit and the second heat exchange unit are arranged so as to be opposed to each other along a corner portion between adjacent two side surfaces of a casing.

Abstract: A laminated header includes: a plurality of plate-like members laminated with each other; one first opening; a plurality of second openings; and a distribution flow passage connecting the one first opening and each of the plurality of second openings to each other. The distribution flow passage includes: a first passage having a straight line shape; a first branching flow passage for the first passage to branch into a plurality of passages; a second passage that has a straight line shape and is connected to each of the plurality of passages branched in the first branching flow passage; a second branching flow passage for the second passage to branch into a plurality of passages; and a third passage that has a straight line shape and is connected to each of the plurality of passages branched in the second branching flow passage.

Abstract: A distributor includes a main body. The main body includes a refrigerant inflow path, a plurality of refrigerant outflow paths, a distribution path communicating with the refrigerant inflow path and the plurality of refrigerant outflow paths, and a plurality of tapered paths each communicating between corresponding one of the plurality of refrigerant outflow paths and the distribution path. The tapered paths each have an inlet opening and an outlet opening, the inlet opening being larger than the outlet opening.

Abstract: Plate-shaped fins of a heat exchanger each include, at circumferential portions thereof defining a notch in which a heat transfer tube having a flattened shape is disposed, fin collars formed by being raised from the circumferential portions. Each of the fin collars includes, in a position that faces a long axis side surface of the heat transfer tube, at least one reflare section bent in a direction opposite to the side surface. At least one of the reflare sections defining fin pitches between the adjoining plate-shaped fins is formed so that a reflare tip portion, which is a tip portion of the reflare section, is drawn apart from a contact side surface of the plate-shaped fin with which the reflare section comes into contact.

Abstract: A heat exchanger, in which refrigerant causing disproportionation is used, includes a main heat exchange unit including a plurality of first heat transfer pipes arranged side by side, a sub-heat exchange unit including a plurality of second heat transfer pipes arranged side by side, and a relay unit including a plurality of relay passages connecting the plurality of first heat transfer pipes and the plurality of second heat transfer pipes. Each of the plurality of relay passages has one inlet connected to a corresponding one of the plurality of second heat transfer pipes, and a plurality of outlets each connected to a corresponding one of the plurality of first heat transfer pipes. Each of the plurality of relay passages distributes the refrigerant flowing from the one inlet, without merging streams of the refrigerant together, and causes the refrigerant to flow out of the plurality of outlets.

Abstract: An internal heat exchanger and a first flow control valve are connected in series between a condenser and a refrigerant inlet of an ejector. A gas refrigerant outlet of a gas-liquid separator is connected to a suction port of a compressor. A first bypass circuit connects a refrigerant outlet of the condenser to an intermediate pressure portion of the compressor via a second flow control valve and the internal heat exchanger. A second bypass circuit connects a refrigerant outlet of the internal heat exchanger to the liquid refrigerant outlet of the gas-liquid separator via a third flow control valve. While the second flow control valve is opened such that the refrigerant flows through the first bypass circuit, the fourth flow control valve is switched to be opened or closed, and the third flow control valve is switched to be closed or opened.

Abstract: An outdoor unit includes an outdoor air heat exchanger formed of an air heat exchanger that includes multiple aligned fins and a heat transfer tube intersecting the fins at multiple positions and transferring heat of a refrigerant flowing in the tube and that exchanges heat between the refrigerant and air; and a blower fan forming a flow of the air flowing through the outdoor air heat exchanger. In the outdoor air heat exchanger, the heat transfer tube intersects the fins at intervals based on a flow rate of the air flowing into the outdoor air heat exchanger according to a positional relationship with the blower fan.

Abstract: A refrigeration cycle apparatus avoids refrigerant conditions causing a disproportionation reaction and exhibit high performance with safety even when a refrigerant causing the disproportionation reaction is used in a zeotropic refrigerant mixture. The refrigeration cycle apparatus uses, as a working refrigerant, the zeotropic refrigerant mixture of a first refrigerant and a second refrigerant having a higher boiling point than that of the first refrigerant under the same pressure, and includes at least a main passage sequentially connecting a compressor, a first heat exchanger, an expansion valve, a gas-liquid separator, and a second heat exchanger. The first refrigerant causes the disproportionation reaction.

Abstract: A refrigeration cycle apparatus includes refrigerant circuits each configured to circulate a refrigerant of the same composition. The refrigerant circuit is provided with a radiator configured to condense the refrigerant to transfer heat to external fluid, and the refrigerant circuit is provided with a radiator configured to transfer heat to the external fluid while allowing the refrigerant to be maintained in a supercritical state. The radiator is arranged upstream of the radiator in a direction of a flow of the external fluid. A capacity of a refrigerant flow channel of the radiator is smaller than a capacity of a refrigerant flow channel of the radiator.

Abstract: A refrigeration cycle device includes: a compressor that constitutes a refrigeration cycle and compresses a supplied refrigerant; a refrigerant-retaining container that retains the refrigerant into which lubricating oil for the compressor is mixed, and which separates the gas refrigerant from the liquid refrigerant, and sends out the gas refrigerant to the compressor; a refrigerant conveying pump that conveys a fluid mixture including the liquid refrigerant and the lubricating oil retained in the refrigerant-retaining container; and an internal heat exchanger that changes the liquid refrigerant conveyed out from the refrigerant-retaining container by the refrigerant conveying pump to the gas refrigerant, and provides the compressor with the gas refrigerant together with the lubricating oil. Since the refrigerant conveying pump conveys the fluid mixture containing the liquid refrigerant and the lubricating oil retained in a refrigerant-retaining container, stable operation is possible.

Abstract: In a refrigeration cycle apparatus, a compressor, a condenser, a first flow control valve, a refrigerant storage container, a second flow control valve, and a first evaporator are connected in this order, and a third flow control valve, an ejector, a second evaporator, and the compressor are connected in this order so as to branch from an outlet of the condenser. A driving refrigerant inlet of the ejector is connected to the third flow control valve, a suction refrigerant inlet of the ejector is connected to an outlet of the first evaporator, and a mixed refrigerant outlet of the ejector is connected to a refrigerant inlet of the second evaporator. The refrigeration cycle apparatus has a bypass circuit which branches from a refrigerant pipe connecting the condenser and the second flow control valve and is connected to the mixed refrigerant outlet of the ejector via a fourth flow control valve.

Abstract: A refrigeration cycle device selectively performs a heating operation and a cooling operation. The refrigeration cycle device includes: a compressor that suctions a refrigerant and compresses the refrigerant; a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fourth heat exchanger each of which exchanges heat with the refrigerant; an ejector that includes a refrigerant inlet port, a refrigerant suction port, and a refrigerant outlet port; a controller that is connected between the first heat exchanger and the second heat exchanger and configured to control a flow rate of the refrigerant; and a switching device configured to perform switching of a flow path of the refrigerant in both the heating and cooling operations.

Abstract: A heat exchanger according to the present invention includes a heat exchanging unit, and a distributing and joining unit connected to the heat exchanging unit and including a distributing flow passage and a joining flow passage. The distributing and joining unit separately includes a first header including the distributing flow passage formed therein and excluding the joining flow passage, and a second header juxtaposed to the first header and including the joining flow passage formed therein and excluding the distributing flow passage. At least one of the first header and the second header is a stacking type header including a plurality of plate-like members including partial flow passages formed therein and stacked so that the partial flow passages are communicated with each other to form the distributing flow passage or the joining flow passage.

Abstract: A tube fitting includes a through portion. A flat tube is connected to the first end portion of the through portion, and another tube different in cross-sectional shape from the flat tube is connected to the second end portion of the through portion. The central axis of the first end portion and the central axis of the second end portion are deviated from each other.

Abstract: A heat exchanger including a first heat exchanger disposed on upstream side of a heat exchange fluid and a second heat exchanger disposed on downstream side of the heat exchange fluid, which are connected in series in a flow path of a heat medium, wherein the heat medium flows from the first heat exchanger to the second heat exchanger so as to be parallel to the flow of the heat exchange fluid when the heat exchanger serves as an evaporator, the heat medium flows from the second heat exchanger to the first heat exchanger so as to be opposed to the flow of the heat exchange fluid when the heat exchanger serves as a condenser, and a sum of flow path volume of first heat-transfer tubes of the first heat exchanger is smaller than a sum of flow path volume of second heat-transfer tubes of the second heat exchanger.

Abstract: A stacking type header according to the present invention includes a first plate shaped body having a plurality of first outlet flow paths and a second plate shaped body stacked on the first plate shaped body and having a distribution flow path so that refrigerant flowing from a first inlet flow path is distributed and flows out to the plurality of first outlet flow paths. A branch flow path of the distribution flow path is formed to allow refrigerant flowing into a branch section to flow out in an upwardly declined or downwardly declined direction.

Abstract: A laminated header includes a plate-like unit including: bare members having first flow passages formed therein with no brazing material being applied to each of the bare members; and cladding members having second flow passages formed therein with a brazing material being applied to at least a front surface and a back surface of each of the cladding members. The bare members and the cladding members are alternately laminated so that the first flow passages and the second flow passages communicate with each other. A pipe is joined to the plate-like unit under a state in which an end portion of the pipe is inserted into at least one of the first flow passages or the second flow passages. One of the bare members is laminated on an outermost side of the plate-like unit in a laminating direction of the bare members and the cladding members.

Abstract: A laminated header according to the present invention includes: a first plate-like body having a plurality of first outlet flow passages formed therein; and a second plate-like body laminated on the first plate-like body, the second plate-like body having a distribution flow passage formed therein, the distribution flow passage being configured to distribute refrigerant, which passes through a first inlet flow passage to flow into the second plate-like body, to the plurality of first outlet flow passages to cause the refrigerant to flow out from the second plate-like body. A branching flow passage of the distribution flow passage includes: a branching portion; an inflow passage extending toward the branching portion; and a plurality of outflow passages extending from the branching portion in directions different from each other. Curvature radii of bending portions of the plurality of outflow passages are different from each other.