Abstract: A method for manufacturing a fiber mat includes: dispersing a fine fiber having thermoplasticity in a dispersion medium; extracting the fine fiber from the dispersion medium onto the support to form a mat; and applying light to a first main surface of the mat so as to fusion-bond the fine fiber located on the first main surface side of the mat, the first main surface being opposite to the support.

Abstract: A heat exchanger for an air conditioning device includes flat tubes, a vertically extending header collecting tube connected to the flat tubes, and fins joined to the flat tubes. The header collection tube has a loop structure including partition members, inflow ports, and upper and lower communicating passages. The partition members partition first and second spaces. The flat tubes are connected at the first spaces. The inflow ports are located in lower parts of the first spaces. The upper communicating passages communicate the upper parts of the first and second spaces to guide refrigerant from the first spaces into the second spaces. The lower communicating passages communicate the lower parts of the first and second spaces to guide refrigerant from the second spaces towards spaces above the inflow ports in the first spaces to return the refrigerant from the second spaces to the first spaces.

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 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 heat exchanger includes a plurality of flat tubes, a header collecting tube connected to the flat tubes, and fins joined to the flat tubes. The header collecting tube includes a first partition member partitioning an internal space into upper and lower internal spaces, a second partition member partitioning the upper internal space into first and second spaces, an inflow port formed at a bottom part of the first space, an upper communicating passage, a lower communicating passage. A third partition member partitions the lower internal space into an ascension space and an inflow space. A lower communicating port allows refrigerant to pass from the inflow space to the ascension space. The lower communicating port and the refrigerant passages of the flat tubes that are connected to the lower internal space are arranged so as not to overlap each other as viewed along the longitudinal direction of the flat tubes.

Abstract: In a heat exchanger, a principal windward heat exchange region includes a principal windward bank portion, a principal leeward heat exchange region includes a principal leeward bank portion, an auxiliary windward heat exchange region includes an auxiliary windward bank portion, and an auxiliary leeward heat exchange region includes an auxiliary leeward bank portion. Each of the principal and auxiliary bank portions is constituted of a plurality of flat tubes. In the heat exchanger functioning as an evaporator, a refrigerant flows sequentially through the auxiliary windward, auxiliary leeward, principal leeward, and principal windward bank portions. In the heat exchanger functioning as a condenser, a refrigerant flows sequentially through the principal windward, principal leeward, auxiliary leeward, and auxiliary windward bank portions. Consequently, the heat exchanger exhibits performance sufficient for functioning as both an evaporator and a condenser.

Abstract: A heat exchanger includes a plurality of flat tubes, a header collecting tube connected to the flat tubes, and fins joined to the flat tubes. The header collecting tube includes a first partition member partitioning an internal space into upper and lower internal spaces, a second partition member partitioning the upper internal space into first and second spaces, an inflow port formed at a bottom part of the first space, an upper communicating passage, a lower communicating passage. A third partition member partitions the lower internal space into an ascension space and an inflow space. A lower communicating port allows refrigerant to pass from the inflow space to the ascension space. The lower communicating port and the refrigerant passages of the flat tubes that are connected to the lower internal space are arranged so as not to overlap each other as viewed along the longitudinal direction of the flat tubes.

Abstract: A heat exchanger for an air conditioning device includes flat tubes, a vertically extending header collecting tube connected to the flat tubes, and fins joined to the flat tubes. The header collection tube has a loop structure including partition members, inflow ports, and upper and lower communicating passages. The partition members partition first and second spaces. The flat tubes are connected at the first spaces. The inflow ports are located in lower parts of the first spaces. The upper communicating passages communicate the upper parts of the first and second spaces to guide refrigerant from the first spaces into the second spaces. The lower communicating passages communicate the lower parts of the first and second spaces to guide refrigerant from the second spaces towards spaces above the inflow ports in the first spaces to return the refrigerant from the second spaces to the first spaces.

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: In a heat exchanger, a principal windward heat exchange region includes a principal windward bank portion, a principal leeward heat exchange region includes a principal leeward bank portion, an auxiliary windward heat exchange region includes an auxiliary windward bank portion, and an auxiliary leeward heat exchange region includes an auxiliary leeward bank portion. Each of the principal and auxiliary bank portions is constituted of a plurality of flat tubes. In the heat exchanger functioning as an evaporator, a refrigerant flows sequentially through the auxiliary windward, auxiliary leeward, principal leeward, and principal windward bank portions. In the heat exchanger functioning as a condenser, a refrigerant flows sequentially through the principal windward, principal leeward, auxiliary leeward, and auxiliary windward bank portions. Consequently, the heat exchanger exhibits performance sufficient for functioning as both an evaporator and a condenser.

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: An air conditioning device capable of preventing drainage water dropped down from a heat exchange portion on the upper side for which a defrosting operation is performed from being frozen again in a heat exchange portion used for a heating operation, so that a decrease in a heating ability can be suppressed is provided. In an air conditioning device including a heat source side heat exchanger formed by providing a plurality of heat exchange portions, to which a refrigerant is supplied through different paths from each other, side by side in the up and down direction, and partial defrosting means for, while the heating operation is performed by using a part of the heat exchange portions, performing the defrosting operation for the other heat exchange portions, a drainage mechanism for draining drainage water generated in each of the heat exchange portions is provided for each of the heat exchange portions.

Abstract: An air conditioning apparatus includes a defrosting flow channel mechanism. The air conditioning apparatus performs an air-warming defrost operation in which refrigerant sent from an indoor heat exchanger to an outdoor heat exchanger is evaporated while defrosting an arbitrarily selected heat exchange path using the defrosting flow channel mechanism. In the defrost operation, the refrigerant sent to the outdoor heat exchanger from the indoor heat exchanger is not channeled into the refrigerant flow diverter but is passed through the arbitrarily selected heat exchange path from the gas-side end to the liquid-side end of the arbitrarily selected heat exchange path, and the refrigerant passed through the arbitrarily selected heat exchange path flows through the refrigerant flow diverter to be passed through other heat exchange paths other than the arbitrarily selected heat exchange path from the liquid-side end to the gas-side end of the other heat exchange paths.