Abstract: A heat exchanger is adapted to be used in a vapor compression system. The tube bundle includes a plurality of heat transfer tubes in a falling film region and in an accumulating region. The heat transfer tubes in the falling film region are arranged in a plurality of columns extending parallel to each other. The heat transfer tubes in the accumulating region are arranged in a plurality of rows extending parallel to each other. A trough part includes a plurality of trough sections disposed respectively below the rows of the heat transfer tubes in the accumulating region to accumulate the refrigerant therein. A ratio between a number of rows of the heat transfer tubes in the accumulating region and a number of the heat transfer tubes in each of the columns in the falling film region is about 1:9 to about 2:8.

Abstract: A heat exchanger is adapted to be used in a vapor compression system. The tube bundle includes a plurality of heat transfer tubes in a falling film region and in an accumulating region. The heat transfer tubes in the falling film region are arranged in a plurality of columns extending parallel to each other. The heat transfer tubes in the accumulating region are arranged in a plurality of rows extending parallel to each other. A trough part includes a plurality of trough sections disposed respectively below the rows of the heat transfer tubes in the accumulating region to accumulate the refrigerant therein. A ratio between a number of rows of the heat transfer tubes in the accumulating region and a number of the heat transfer tubes in each of the columns in the falling film region is about 1:9 to about 2:8.

Abstract: A heat exchanger for a vapor compression system includes a shell, a distributing part disposed inside of the shell to distribute a refrigerant, a tube bundle and a trough part. The tube bundle includes a plurality of heat transfer tubes disposed inside of the shell below the distributing part. The tube bundle includes a falling film region disposed below the distributing part, an accumulating region disposed below the falling film region, and a flooded region disposed below the accumulating region at a bottom portion of the shell. The trough part extends under at least one of the heat transfer tubes in the accumulating region to accumulate the refrigerant therein. The trough part at least partially overlaps with the at least one of the heat transfer tubes in the accumulating region when viewed along a horizontal direction perpendicular to the longitudinal center axis of the shell.

Abstract: A heat exchanger for a vapor compression system includes a shell with a longitudinal center axis extending generally parallel to a horizontal plane, a distributing part, a tube bundle, a trough part and a guide part. The distributing part distributes a refrigerant. The tube bundle includes a plurality of heat transfer tubes disposed below the distributing part so that the refrigerant discharged from the distributing part is supplied onto the tube bundle. The heat transfer tubes extend generally parallel to the longitudinal center axis of the shell. The trough part extends generally parallel to the longitudinal center axis of the shell under at least one of the heat transfer tubes to accumulate the refrigerant in the trough part. The guide part includes at least one lateral side portion extending upwardly and laterally outwardly from the tube bundle at a vertical position at an upper end of the trough part.

Abstract: A heat exchanger includes a shell, a refrigerant distribution assembly, a heat transferring unit and a canopy member. The refrigerant distribution assembly receives a refrigerant that enters the shell and discharges the refrigerant. The refrigerant distribution assembly has at least one outermost lateral end. The heat transferring unit is disposed below the refrigerant distribution assembly so that the refrigerant discharged from the refrigerant distribution assembly is supplied to the heat transferring unit. The heat transferring unit includes a plurality heat transfer tubes. The canopy member includes at least one lateral side portion extending laterally outwardly and downwardly from a position above the refrigerant distribution assembly. The lateral side portion has a free end disposed laterally further from a vertical plane than the refrigerant distribution assembly, and lower than an upper edge of the outermost lateral end of the refrigerant distribution assembly.

Abstract: A heat exchanger is adapted to be used in a vapor compression system, and includes a shell, a distributing part and a tube bundle. The tube bundle includes a plurality of heat transfer tubes arranged in a plurality of columns extending parallel to each other when viewed along the longitudinal center axis of the shell. The heat transfer tubes has at least one of: an arrangement in which a vertical pitch between adjacent ones of the heat transfer tubes in at least one of the columns is larger in an upper region of the tube bundle than in a lower region of the tube bundle; and an arrangement in which a horizontal pitch between adjacent ones of the columns is larger in an outer region of the tube bundle than in an inner region of the tube bundle.

Abstract: A heat exchanger includes a shell, a refrigerant distribution assembly and a heat transferring unit. The refrigerant distribution assembly includes a first tray part and second tray parts. The first tray part continuously extends generally parallel to the longitudinal center axis of the shell to receive a refrigerant that enters the shell. The second tray parts are disposed below the first tray part to receive the refrigerant discharged from first discharge apertures such that the refrigerant accumulated in the second tray parts does not communicate between the second tray parts. The second tray parts are aligned along a direction generally parallel to the longitudinal center axis of the shell. The heat transferring unit is disposed below the second tray parts so that the refrigerant discharged from second discharge apertures of the second tray parts is supplied to the heat transferring unit.

Abstract: A heat exchanger for a vapor compression system includes a shell, a distributing part disposed inside of the shell to distribute a refrigerant, a tube bundle and a trough part. The tube bundle includes a plurality of heat transfer tubes disposed inside of the shell below the distributing part. The tube bundle includes a falling film region disposed below the distributing part, an accumulating region disposed below the falling film region, and a flooded region disposed below the accumulating region at a bottom portion of the shell. The trough part extends under at least one of the heat transfer tubes in the accumulating region to accumulate the refrigerant therein. The trough part at least partially overlaps with the at least one of the heat transfer tubes in the accumulating region when viewed along a horizontal direction perpendicular to the longitudinal center axis of the shell.

Abstract: A heat exchanger for a vapor compression system includes a shell with a longitudinal center axis extending generally parallel to a horizontal plane, a distributing part, a tube bundle, a trough part and a guide part. The distributing part distributes a refrigerant. The tube bundle includes a plurality of heat transfer tubes disposed below the distributing part so that the refrigerant discharged from the distributing part is supplied onto the tube bundle. The heat transfer tubes extend generally parallel to the longitudinal center axis of the shell. The trough part extends generally parallel to the longitudinal center axis of the shell under at least one of the heat transfer tubes to accumulate the refrigerant in the trough part. The guide part includes at least one lateral side portion extending upwardly and laterally outwardly from the tube bundle at a vertical position at an upper end of the trough part.

Abstract: A heat exchanger includes a shell, a refrigerant distribution assembly, a heat transferring unit and a canopy member. The refrigerant distribution assembly receives a refrigerant that enters the shell and discharges the refrigerant. The refrigerant distribution assembly has at least one outermost lateral end. The heat transferring unit is disposed below the refrigerant distribution assembly so that the refrigerant discharged from the refrigerant distribution assembly is supplied to the heat transferring unit. The heat transferring unit includes a plurality heat transfer tubes. The canopy member includes at least one lateral side portion extending laterally outwardly and downwardly from a position above the refrigerant distribution assembly. The lateral side portion has a free end disposed laterally further from a vertical plane than the refrigerant distribution assembly, and lower than an upper edge of the outermost lateral end of the refrigerant distribution assembly.

Abstract: A finned tube heat exchanger includes a plurality heat-transfer fins and a plurality of heat-transfer tubes. The heat-transfer fins are disposed along an airflow direction. The plurality of heat-transfer tubes are inserted into the heat-transfer fins and arranged in a direction substantially orthogonal to the airflow direction. Each of the heat transfer fins includes a plurality of sets of cut-and-raised parts with each set being straightly aligned from the upstream side toward the downstream side. At least one set of cut-and-raised parts is connected by a straight line sloped relative to the airflow direction. Each of the heat transfer fins includes a plurality of concavities with each concavity formed on a periphery of one of the heat-transfer tubes at least partially below a horizontal plane that passes through a center axis of the heat-transfer tubes and lies on an upper surface of the heat transfer fin having the concavity formed therein.

Abstract: A heat exchanger is adapted to be used in a vapor compression system, and includes a shell, a distributing part and a tube bundle. The tube bundle includes a plurality of heat transfer tubes arranged in a plurality of columns extending parallel to each other when viewed along the longitudinal center axis of the shell. The heat transfer tubes has at least one of: an arrangement in which a vertical pitch between adjacent ones of the heat transfer tubes in at least one of the columns is larger in an upper region of the tube bundle than in a lower region of the tube bundle; and an arrangement in which a horizontal pitch between adjacent ones of the columns is larger in an outer region of the tube bundle than in an inner region of the tube bundle.

Abstract: A heat exchanger is adapted to be used in a vapor compression system, and includes a shell, a distributing part, a tube bundle and a trough part. The shell has a longitudinal center axis extending generally parallel to a horizontal plane. The distributing part is configured and arranged to distribute a refrigerant. The tube bundle includes a plurality of heat transfer tubes disposed below the distributing part so that the refrigerant discharged from the distributor is supplied onto the tube bundle. The heat transfer tubes extend generally parallel to the longitudinal center axis. The trough part extends generally parallel to the longitudinal center axis under at least one of the heat transfer tubes to accumulate the refrigerant therein. The trough part at least partially overlaps with the at least one of the heat transfer tubes when viewed along a horizontal direction perpendicular to the longitudinal center axis.

Abstract: A heat exchanger includes a shell, a refrigerant distribution assembly and a heat transferring unit. The refrigerant distribution assembly includes a first tray part and second tray parts. The first tray part continuously extends generally parallel to the longitudinal center axis of the shell to receive a refrigerant that enters the shell. The second tray parts are disposed below the first tray part to receive the refrigerant discharged from first discharge apertures such that the refrigerant accumulated in the second tray parts does not communicate between the second tray parts. The second tray parts are aligned along a direction generally parallel to the longitudinal center axis of the shell. The heat transferring unit is disposed below the second tray parts so that the refrigerant discharged from second discharge apertures of the second tray parts is supplied to the heat transferring unit.

Abstract: The present invention relates to a hot water heat transfer pipe that exchanges heat between its interior and exterior. A plurality of projections, each having a height in the range of 0.8-2.0 mm or 0.1-0.25 times the inner diameter, is provided in at least one part of an inner surface of a portion of the heat transfer pipe positioned in a section where the Reynolds number of the fluid flowing in the interior is less than 7,000 to improve the heat transfer performance in the low Reynolds number zone and minimize pressure loss inside the pipe.

Abstract: An indoor unit for a multi-directional air supply air conditioner capable of performing at least a heating operation includes: an indoor fan (39) for sucking air in an axial direction thereof and radially blowing out the air; and a heat exchange part (38), connected in a refrigerant circuit (80) and disposed to surround the indoor fan (39), for exchanging heat between the air blown out of the indoor fan (39) and refrigerant in the refrigerant circuit (80). The heat exchange part (38) includes a plurality of heat exchangers (48) separated from each other along the direction of the perimeter thereof and connected in parallel with each other in the refrigerant circuit (80).

Abstract: A flow distributor is adapted to distribute two-phase refrigerant into a plurality of flow paths. The flow distributor includes a tubular main body having a center axis, at least one inlet port, and a plurality of outlet ports. The inlet port is disposed in a lower portion of the main body in a state in which the center axis of the main body is oriented in a generally vertical direction. The inlet port has a center axis that is not parallel to and does not intersect with the center axis of the main body so as to generate an upward spiraling flow of the refrigerant within the main body. The outlet ports form a plurality of openings disposed in an upper portion of the main body in the state in which the center axis of the main body is oriented in the generally vertical direction, with all of the openings being at least partially arranged in a plane orthogonal to the center axis of the main body.

Abstract: A refrigerant flow divider is made up of an inlet pipe 12 through which refrigerant Xin flows in, a main body 11 of which the inside is a cavity, and a plurality of branching pipes 13 through which refrigerant Xout flows out. When the length of the above described main body 11 of the flow divider is L mm and the inner diameter of the above described main body 11 of the flow divider is D2 mm, the relationship 2?L/D2?8 holds, and thus, a flow divider can be gained, where discrepancy (variation) in the flow rate ratio in the respective paths for the flow discharged from the outlet of the flow divider and entering the heat exchanger is small and pressure loss is small when there is a change of approximately ±10° in the installation angle, a change in the dryness of the refrigerant at the inlet (0.2 to 0.4) or a change in the flow rate of the refrigerant (50% to 100%).

Abstract: A fin tube heat exchanger has heat transfer fins disposed in an air flow and plural heat transfer tubes that are inserted in the heat transfer fins and disposed in a direction substantially orthogonal to a flow direction of the air flow. On the heat transfer fins, a set of guide fins and a set of guide fins arranged straightly from upstream to downstream in the flow direction of the air flow are formed, by cutting and raising, on the heat transfer fin surfaces on both sides of the heat transfer tubes. Straight lines that hypothetically interconnect the guide fins and the guide fins slant with respect to the flow direction of the air flow so as to guide the air flow in the vicinities of the heat transfer tubes to rear sides of the heat transfer tubes in the flow direction.

Abstract: A finned tube heat exchanger includes a plurality heat-transfer fins and a plurality of heat-transfer tubes. The heat-transfer fins are disposed along an airflow direction. The plurality of heat-transfer tubes are inserted into the heat-transfer fins and arranged in a direction substantially orthogonal to the airflow direction. Each of the heat transfer fins includes a plurality of sets of cut-and-raised parts with each set being straightly aligned from the upstream side toward the downstream side. At least one set of cut-and-raised parts is connected by a straight line sloped relative to the airflow direction. Each of the heat transfer fins includes a plurality of concavities with each concavity formed on a periphery of one of the heat-transfer tubes at least partially below a horizontal plane that passes through a center axis of the heat-transfer tubes and lies on an upper surface of the heat transfer fin having the concavity formed therein.