A heat exchanger includes a heat exchanger body having a first end and a second end opposed to the first end along a flow axis. A plurality of flow channels is defined in the heat exchanger body extending axially with respect to the flow axis. A first set of the flow channels forms a first flow circuit and a second set of the flow channels forms a second flow circuit that is in fluid isolation from the first flow circuit. Each flow channel is fluidly isolated from the other flow channels. The flow channels all conform to a curvilinear profile.

The present application discloses a microchannel flat tube and a microchannel heat exchanger. The microchannel flat tube includes a flat tube body and a row of channels. The row of channels is arranged in the flat tube body along a width direction. The row of channels extends through the flat tube body along a length direction. A cross-section of each channel includes a first width in the width direction and a first height in a thickness direction. The row of channels at least includes a first group of first channels, a second group of second channels and a third group of third channels along the width direction. The first widths of the first channels, the second channels and the third channels decrease at a fixed rate, thereby facilitating the control of the thickness of the microchannel flat tube and improving the heat exchange efficiency of the third channels.

The present application discloses a microchannel flat tube and a microchannel heat exchanger. The microchannel flat tube includes a flat tube body and a row of channels. The flat tube body includes a first plane, a second plane, a first side surface and a second side surface. The first side surface and the second side surface are arranged on opposite sides of the flat tube body. The row of channels is arranged in the flat tube body. The row of channels extends through the flat tube body. The row of channels extends through the flat tube body. The row of channels at least includes a first channel, a second channel and a third channel which are arranged in a width direction. Cross-sectional areas of the first channel, the second channel and the third channel in the width direction change according to an exponential function.

A heat exchanger includes a first fluid pathway enclosed in a heat exchanger body to convey a first fluid through the heat exchanger body and a second fluid pathway enclosed in the heat exchanger body to convey a second fluid through the heat exchanger body and facilitate thermal energy exchange between the first fluid and the second fluid. The first fluid pathway and the second fluid pathway together are arranged in a spiral arrangement extending along a central axis of the heat exchanger.

A microchannel flat tube applicable in a microchannel heat exchanger includes a flat tube body and a row of channels. The row of channels is arranged in the flat tube body along a width direction. The row of channels extends through the flat tube body along a length direction. A cross-section of each channel includes a first width in the width direction and a first height in a thickness direction. The row of channels at least includes a first group of first channels, a second group of second channels and a third group of third channels along the width direction. The first widths of the first channels, the second channels and the third channels decrease at a fixed value, thereby facilitating the control of the thickness of the microchannel flat tube and improving the heat exchange efficiency.

A heat exchanger includes plural heat transfer tubes disposed with a specified spacing from each other in the up and down direction, and a distributor configured to distribute refrigerant to the heat transfer tubes. The distributor includes a body part, and plural flow-splitting parts, the body part including a first passage in which refrigerant flows upward, the flow-splitting parts communicating with the first passage and with one of the heat transfer tubes. The flow-splitting parts include one or more first flow-splitting parts each communicating with a first heat transfer tube, which is a higher positioned heat transfer tube. The flow-splitting parts include one or more second heat transfer tubes each communicating with a second heat transfer tube positioned below the first heat transfer tube. The refrigerant inlet of the first flow-splitting part communicates with the first passage at a location below the refrigerant inlet of the second flow-splitting part.

The present disclosure provides a louvered fin including a leading edge, a trailing edge, and a surface extending between the leading edge and the trailing edge. The surface defines a first set of holes along a first axis, a second set of holes along a second axis and offset from the first set of holes, and a third set of holes along a third axis and offset from the second set of holes. Each of the first axis, the second axis, and the third axis extends substantially parallel to a longitudinal axis of the fin. A first offset distance between the second and first set of holes is greater than a second offset distance between the third and second set of holes. The second and the third set of holes define a substantially obtuse trapezoidal matrix.

The present invention relates to an apparatus installed in a vehicle for recovering exhaust heat. The apparatus includes: a housing having therein a heat exchanger and having a front through hole through which exhaust gas is introduced and a rear through hole through which the introduced exhaust gas is discharged; a first tube installed in the housing and having a dual tube structure; and a second tube connected to the first tube and having a dual tube structure. A coolant introduced through the second tube passes through the first tube and exchanges heat with the exhaust gas in the heat exchanger in the housing. The coolant, which has exchanged heat, is discharged to an engine through the first tube and the second tube.

The present application discloses a microchannel flat tube and a microchannel heat exchanger. The microchannel flat tube includes a flat tube body and a row of channels. The row of channels is arranged in the flat tube body along a width direction. The row of channels extends through the flat tube body along a length direction. A cross-section of each channel includes a first width in the width direction and a first height in a thickness direction. The row of channels at least includes a first group of first channels, a second group of second channels and a third group of third channels along the width direction. The first widths of the first channels, the second channels and the third channels decrease at a fixed rate, thereby facilitating the control of the thickness of the microchannel flat tube and improving the heat exchange efficiency of the third channels.

A heat exchange core according to an embodiment includes a plurality of first layers including a plurality of first flow paths, a first header connected to the plurality of first flow paths, and a plurality of second layers including a plurality of second flow paths and disposed alternately with the first layers in a layering direction. The first header includes a first main header extending in the layering direction and a first sub header provided on each of the plurality of first layers and connected to the first main header. End portions of some of the plurality of first flow paths are connected to the first main header, and end portions of a remainder of the plurality of first flow paths are connected to the first sub header.