| CPC F28D 9/005 (2013.01) [F25B 39/04 (2013.01); F28D 9/02 (2013.01); F28F 3/08 (2013.01)] | 25 Claims |
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1. A heat exchanger comprising:
a plate stack in which a plurality of plates are stacked to form a condensing portion and a subcooling portion, wherein
the condensing portion is formed such that a first refrigerant flow path through which a gas-phase refrigerant flowing into a refrigerant inlet flows and a first heat-medium flow path through which a heat medium flows overlap each other in a stacking direction of the plurality of plates, radiates heat from the gas-phase refrigerant to the heat medium to condense the gas-phase refrigerant, and discharges the condensed refrigerant toward a gas-liquid separator,
the gas-liquid separator separates the refrigerant condensed by the condensing portion into the gas-phase refrigerant and a liquid-phase refrigerant and discharges the liquid-phase refrigerant out of the gas-phase refrigerant and the liquid-phase refrigerant,
the subcooling portion is disposed on one side in the stacking direction with respect to the condensing portion, is formed such that a second refrigerant flow path through which the liquid-phase refrigerant discharged from the gas-liquid separator flows toward a refrigerant outlet and a second heat-medium flow path through which the heat medium flows overlap each other in the stacking direction, and radiates heat from the liquid-phase refrigerant to the heat medium to subcool the liquid-phase refrigerant,
each of the refrigerant inlet and the refrigerant outlet is disposed on an opposite side of the subcooling portion with respect to the condensing portion,
the heat medium allowed to flow in via a heat-medium inlet flows through the first heat-medium flow path and the second heat-medium flow path,
the heat medium passing through the first heat-medium flow path and the second heat-medium flow path is discharged from a heat-medium outlet,
the heat-medium inlet and the heat-medium outlet are disposed on the opposite side of the subcooling portion with respect to the condensing portion,
the gas-liquid separator is disposed on the opposite side of the condensing portion with respect to the subcooling portion,
each of the plurality of plates has a first through hole configured to guide the heat medium flowing into the heat-medium inlet to the first heat-medium flow path and the second heat-medium flow path, and a second through hole configured to guide the heat medium having passed through the first heat-medium flow path and the second heat-medium flow path to the heat-medium outlet,
each of the plurality of plates has a plate shape spreading in a first direction and a third direction perpendicular to each other, the first direction being perpendicular to a second direction in which the plurality of plates are stacked with each other,
in a plan view of each of the plurality of plates, a center of a through hole defining the refrigerant inlet is positioned within a region defined by an overlap between an area extended toward one side from an external shape of the first through hole in the first direction and an area extended toward one side from an external shape of the second through hole in the third direction, and
in a plan view of each of the plurality of plates, a center of a through hole defining the refrigerant outlet is positioned within a region defined by an overlap between an area extended toward the other side from the external shape of the second through hole in the first direction and an area extended toward the other side from the external shape of the first through hole in the third direction.
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