Abstract: A bent heat exchanger is provided. The bent heat exchanger includes: a first header and a second header; a plurality of flat tubes, two ends of the flat tube being connected to the first header and the second header respectively; and fins, each disposed between adjacent flat tubes, extending in a corrugated shape along a length direction of the flat tube. The first header and the second header each have a slot running through a wall thereof and a protrusion arranged to an inner surface of the wall thereof. The protrusion includes an arc portion connected to the edge of the slot, and an extension portion protruding inwards from the arc portion. An arc radius of the arc portion is less than or equal to and greater than 0.6 times a thickness of a wall of the corresponding first header or second header.

Abstract: A heat exchanger includes a first pipe, a second pipe, a plurality of heat exchange tubes, an inlet/outlet pipe, and a first member. The first pipe has a main channel, and the heat exchange tube is connected between the first pipe and the second pipe. The heat exchange tube includes a plurality of channels disposed to be spaced apart. The plurality of channels include a first channel with a largest flow cross-sectional area and a second channel with a smallest flow cross-sectional area. The first member is located in the main channel of the first pipe to define a first flow channel and a second flow channel. The first flow channel is connected to the inlet/outlet pipe, and the second flow channel is connected to the heat exchange tube. The first member includes through-holes.

Abstract: A heat exchanger and an air conditioning unit with multiple refrigeration systems. The heat exchanger includes a first header, a second header, a third header, a fourth header, a heat exchange tube including a first heat exchange tube and a second heat exchange tube alternately arranged in a length direction of the header, and fins. The first heat exchange tube or the second heat exchange tube or both has a bent section and includes a first section, a middle section, and a second section, and the heat exchanger includes a first part including the first section, a middle part, and a second part. The middle part of the heat exchanger includes the middle section and the fins, and air flowing through the heat exchanger passes through the middle part and then the first part, or passes through the first part and then the middle part.

Abstract: A heat pump system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger connected in sequence to form a refrigerant main circuit. The outdoor heat exchanger includes at least one double-rowed heat exchanger. The heat pump system has a cooling mode and a heating mode, and further includes a switching unit. The switching unit is connected in the refrigerant main circuit, and switches a flow direction of a refrigerant, such that the refrigerant flows into the outdoor heat exchanger through one of the first heat exchanger and the second heat exchanger, and flows out of the outdoor heat exchanger through the other one of the first heat exchanger and the second heat exchanger both in the cooling mode and in the heating mode.

Abstract: A bent heat exchanger is provided. The bent heat exchanger includes: a first header and a second header; a plurality of flat tubes, two ends of the flat tube being connected to the first header and the second header respectively; and fins, each disposed between adjacent flat tubes, extending in a corrugated shape along a length direction of the flat tube. The first header and the second header each have a slot running through a wall thereof and a protrusion arranged to an inner surface of the wall thereof. The protrusion includes an arc portion connected to the edge of the slot, and an extension portion protruding inwards from the arc portion. An arc radius of the arc portion is less than or equal to and greater than 0.6 times a thickness of a wall of the corresponding first header or second header.

Abstract: A heat pump system includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger connected in sequence to form a refrigerant main circuit. The outdoor heat exchanger includes at least one double-rowed heat exchanger. The heat pump system has a cooling mode and a heating mode, and further includes a switching unit. The switching unit is connected in the refrigerant main circuit, and switches a flow direction of a refrigerant, such that the refrigerant flows into the outdoor heat exchanger through one of the first heat exchanger and the second heat exchanger, and flows out of the outdoor heat exchanger through the other one of the first heat exchanger and the second heat exchanger both in the cooling mode and in the heating mode.

Abstract: A bent heat exchanger including a first header and a second header; a plurality of flat tubes, two ends of the flat tube being connected to the first header and the second header respectively, the plurality of flat tubes being spaced apart from one another along axial directions of the first and second header; and fins, each disposed between adjacent flat tubes, extending in a corrugated shape along a length direction of the flat tube, in which a thickness of the fin is FT, a larger one of outer diameters of the first header and the second header is OD, a larger one of wall thicknesses of the first header and the second header is T, a width of the flat tube is W, an arc radius of the fin is FR, and a height of the fin is FH, in which 0.01?(100 ×FT×FR×T)/(FH×OD)?9.