Abstract: A heat exchanger includes: flat pipes vertically arrayed and fins that partition a space between adjacent ones of the flat pipes into air flow passages. Each of the flat pipes includes a passage for a refrigerant. The flat pipes are divided into heat exchange sections. Each of the heat exchange sections includes: a main heat exchange section connected to a gas-side entrance communication space, and a sub heat exchange section that is connected in series to the main heat exchange section at a vertical position different from the main heat exchange section and to a liquid-side entrance communication space.

Abstract: A heat exchanger includes: flat pipes vertically arrayed; and fins that partition a space between adjacent ones of the flat pipes into air flow passages. Each of the flat pipes includes a passage for a refrigerant. The flat pipes are divided into heat exchange sections vertically arranged side by side. Each of the heat exchange sections includes: a main heat exchange section that communicates with a gas-side entrance communication space, and a sub heat exchange section that is connected in series to the main heat exchange section below the main heat exchange section and communicates with a liquid-side entrance communication space.

Abstract: A heat exchanger includes: flat pipes arranged such that flat surfaces of the flat pipes are opposed to one another; and fins each including insertion parts that extend in an insertion direction that crosses a direction in which the flat pipes are disposed and a longitudinal direction of the flat pipes. At least part of each of the flat pipes is inserted into a corresponding one of the insertion parts. Each of the fins includes a cut-and-raised part that is cut and raised in a thickness direction between the insertion parts, and a rib disposed between the insertion part and the cut-and-raised part.

Abstract: A heat exchanger including: a header; flat tubes connected to the header and disposed in line along a longitudinal direction of the header; a first partition that partitions an inner space of the header into a first space on a side where the flat tubes are connected and a second space on a side opposite to the first space; and a second partition that partitions the inner space of the header into a first side and a second side. The first side is one side of the header in the longitudinal direction and the second side is opposite to the first side. The first partition has a common opening. The common opening includes an insertion opening and a refrigerant opening. A refrigerant moves between the first space and the second space via the refrigerant opening. The second partition is inserted into the insertion opening.

Abstract: A plurality of refrigerant channels are grouped into two or more sets of refrigerant channels arranged in an air flow direction, and the two or more sets of refrigerant channels. When the heat exchanger functions as an evaporator, the refrigerants in a pair of the sets of refrigerant channels adjacent to each other in the air flow direction flow in parallel with each other in opposite directions.

Abstract: A heat exchanger includes: heat transfer tubes aligned with one another; a header connected to end portions of the heat transfer tubes; and fins joined to the heat transfer tubes. When viewed in a longitudinal direction of the header and when the heat exchanger is used as an evaporator, the header is divided into: a circulation space including a first space in which refrigerant flows in a first direction along the longitudinal direction of the header and a second space in which the refrigerant flows in a second direction opposite to the first direction along the longitudinal direction; and an insertion space into which the heat transfer tubes are inserted. The header includes: a circulation division plate that divides the first space from the second space; and an insertion space forming plate that divides the circulation space from the insertion space.

Abstract: A heat exchange unit includes a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger being disposed inside a casing so that an inclined installation thereof is possible in both the first attitude and the second attitude. The first heat exchanger has a plurality of first flattened tubes and a plurality of first fins. First fin communicating parts of the plurality of first fins are formed on both sides in a cross-sectional longitudinal direction of the first flattened tubes. The second heat exchanger has a plurality of second flattened tubes and a plurality of second fins. Second fin communicating parts of the plurality of second fins are formed on both sides in a cross-sectional longitudinal direction of the second flattened tubes.

Abstract: A heat exchanger includes a plurality of principal heat exchange sections and auxiliary heat exchange sections. Each of the auxiliary heat exchange sections is in series connection to a corresponding one of the principal heat exchange sections. Tube number ratios of the principal heat exchange sections are obtained by dividing the number of the flat tubes constituting each of the principal heat exchange sections to by the number of the flat tubes constituting a corresponding one of the auxiliary heat exchange sections. Of the principal heat exchange sections, the first principal heat exchange section, which is the lowermost one, has the smallest tube number ratio. Consequently, discharge of liquid refrigerant from a lower portion of the first principal heat exchange section is accelerated during defrosting, thereby shortening the time required for defrosting.

Abstract: A heat exchanger includes a plurality of flat tubes and a coupling header. The flat tubes are disposed in multiple tiers along a predetermined tube tier direction and in multiple rows so as to be adjacent to each other in a tube row direction intersecting the tube tier direction and the longitudinal direction of the flat tubes. The coupling header is formed by joining a first member to a plurality of second members in the tube tier direction. The first member has a plurality of through holes through which pass the first end portions of the flat tubes. The second members when joined to the first member forming a plurality of coupling passages where the first end portions of the flat tubes adjacent to each other in the tube row direction communicate with each other.

Abstract: A refrigerant diverter diverts inflowing refrigerant and to cause the refrigerant to flow out to a downstream side. The refrigerant diverter includes a vertically extending diverter case, and a vertically extending rod-shaped rod member disposed inside the diverter case. The diverter case has a plurality of diverting channels disposed along a circumferential direction, a diverting space arranged to guide the refrigerant to the diverting channels, and a plurality of expelling spaces that communicate with the diverting space through the diverting channels, the expelling spaces being disposed along a vertical direction. The diverting channels are configured from a plurality of holes extending in a longitudinal direction of the rod member and integrally formed in the rod member.

Abstract: An outdoor heat exchanger includes a plurality of flat multi-hole tubes, a return header, a plurality of heat transfer fins, and a partition including a concave-convex portion on the leeward side. A space inside the return header to which the flat multi-hole tubes are connected is formed so as to cause a larger amount of refrigerant to flow on the upstream side than on the downstream side in an airflow direction.

Abstract: A heat exchanger includes a plurality of principal heat exchange sections and auxiliary heat exchange sections. Each of the auxiliary heat exchange sections is in series connection to a corresponding one of the principal heat exchange sections. Tube number ratios of the principal heat exchange sections are obtained by dividing the number of the flat tubes constituting each of the principal heat exchange sections by the number of the flat tubes constituting a corresponding one of the auxiliary heat exchange sections. Of the principal heat exchange sections, the first principal heat exchange section, which is the lowermost one, has the smallest tube number ratio. Consequently, discharge of liquid refrigerant from a lower portion of the first principal heat exchange section is accelerated during defrosting, thereby shortening the time required for defrosting.

Abstract: In two heat exchange regions connected together in series when an outdoor heat exchanger functions as an evaporator, a downstream one of the heat exchange regions has heat exchange sections not less than heat exchange sections of an upstream one of the heat exchange regions, and a most downstream one of the heat exchange regions has more heat exchange sections than a most upstream one of the heat exchange regions.

Abstract: A heat exchange unit includes a first heat exchanger and a second heat exchanger. The first heat exchanger has a plurality of first flattened tubes communicating at different heights with an individual space including a flow channel through which refrigerant is spouted upward when installation is in a first attitude. The second heat exchanger has a plurality of second flattened tubes communicating at different heights with an individual space including a flow channel through which refrigerant is spouted upward when installation is in the first attitude. The first heat exchanger is disposed so that refrigerant is spouted upward in a flow channel of the individual space also in the case of installation in a second attitude, and the second heat exchanger is disposed so that refrigerant is spouted upward in a flow channel of the individual space also in the case of installation in the second attitude.

Abstract: A heat exchanger includes a plurality of members made of aluminum or aluminum alloy, and a bundling component. The bundling component includes a main body portion having an anchoring portion, and a band portion extending from the main body portion and having a section on an opposite side of a main body portion side anchored in the anchoring portion. The bundling component is made of aluminum or aluminum alloy. At least part of the bundling component and at least part of the plurality of members are secured to each other with a brazing material interposed between the parts.

Abstract: A heat exchanger includes a plurality of flat tubes arranged one above the other, a plurality of fins connected to the flat tubes, a first header collecting pipe in which one end of each of the plurality of flat tubes is inserted, and a second header collecting pipe in which the other end of each of the plurality of flat tubes is inserted. The heat exchanger exchanges heat between a fluid flowing through the flat tubes and air outside the flat tubes. Each of the first and second header collecting pipes extends in a vertical direction. At least one of the first and second header collecting pipes comprises a communication space that communicates with an upstream side of the plurality of flat tubes when the heat exchanger functions as an evaporator. The communication space comprises a partition plate.

Abstract: A refrigerant evaporator includes a plurality of vertically disposed flat tubes, and a refrigerant distribution and supply section that causes inflowing refrigerant to flow out to the plurality of flat tubes on a downstream side. The refrigerant distribution and supply section includes a refrigerant supply section having plural supply spaces, a refrigerant introduction and distribution section having an introduction space to introduce the inflowing refrigerant from a lower end side surface, and a distribution space to distribute the refrigerant, and plural connecting passages that guide the refrigerant to the supply spaces. A first flat tube communicating with a lowermost-tier supply space positioned on the lowermost side is disposed at a height position included in a height range of the introduction space, and a lowermost-tier connecting passage that guides the refrigerant to the lowermost-tier supply space is disposed at a position higher than the introduction space.

Abstract: Disclosed herein is a heat exchanger including: a plurality of banks, each of which includes a plurality of flat tubes, arranged in an air flow direction. The refrigerants in the plurality of banks flow in parallel with each other, and each of the flat tubes in the plurality of banks has one or more bent portions which are bent in a width direction of the flat tubes such that the flat tubes of a pair of the banks adjacent to each other in the air flow direction extend along with each other.

Abstract: A plurality of refrigerant channels are grouped into two or more sets of refrigerant channels arranged in an air flow direction, and the two or more sets of refrigerant channels. When the heat exchanger functions as an evaporator, the refrigerants in a pair of the sets of refrigerant channels adjacent to each other in the air flow direction flow in parallel with each other in opposite directions.

Abstract: A heat exchange unit includes a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger being disposed inside a casing so that an inclined installation thereof is possible in both the first attitude and the second attitude. The first heat exchanger has a plurality of first flattened tubes and a plurality of first fins. First fin communicating parts of the plurality of first fins are formed on both sides in a cross-sectional longitudinal direction of the first flattened tubes. The second heat exchanger has a plurality of second flattened tubes and a plurality of second fins. Second fin communicating parts of the plurality of second fins are formed on both sides in a cross-sectional longitudinal direction of the second flattened tubes.