Abstract: A heat exchanger disclosed in the present disclosure includes a first collecting pipe, a second collecting pipe, a number of heat exchange tubes, at least one fin and a hygroscopic colloid. The heat exchange tube has a pipe wall and a refrigerant flow channel for a refrigerant to circulate. The heat exchange tube has a first end and a second end. The refrigerant flow channel extends from the first end to the second end along an extension direction of the heat exchange tube and extends through the heat exchange tube. The hygroscopic colloid is adhered to at least part of an outer surface of the heat exchange tube and/or the fin. The present disclosure also discloses a heat exchange system having the heat exchanger and a method for making the heat exchanger. The hygroscopic colloidal material of the present disclosure is friendly to metal surfaces.

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 multi-channel heat exchanger includes a plurality of heat exchange tubes, each heat exchange tube includes first to fourth heat exchange tube portions which are distributed along a direction from an airflow inlet side to an airflow outlet side. Each heat exchange tube portion includes at least two flow channels. The heat exchange tube has a cross section defined in a thickness direction and a width direction of the heat exchange tubes, and the cross section includes a flow section. A total area of a flow section of the first heat exchange tube portion is A1, a total area of a flow section of the fourth heat exchange tube portion is A4, and the total area A1 of the flow section of the first heat exchange tube portion is 1.05-1.4 times of the total area A4 of the flow section of the fourth heat exchange tube portion.

Abstract: A heat exchanger disclosed in the present disclosure includes a first collecting pipe, a second collecting pipe, a number of heat exchange tubes, at least one fin and a hygroscopic colloid. The heat exchange tube has a pipe wall and a refrigerant flow channel for a refrigerant to circulate. The heat exchange tube has a first end and a second end. The refrigerant flow channel extends from the first end to the second end along an extension direction of the heat exchange tube and extends through the heat exchange tube. The hygroscopic colloid is adhered to at least part of an outer surface of the heat exchange tube and/or the fin. The present disclosure also discloses a heat exchange system having the heat exchanger and a method for making the heat exchanger. The hygroscopic colloidal material of the present disclosure is friendly to metal surfaces.

Abstract: A refrigerant-distributing device and a heat exchanger comprising the refrigerant-distributing device are provided. The refrigerant-distributing device comprises a distributing tube (1) defining a first end and a second end in a length direction thereof and a plurality of nozzles (2) disposed on the distributing tube (1) along the length direction of the distributing tube, each nozzle having a predetermined length and being formed with a through-hole (21) communicating an interior of the distributing tube and an exterior of the distributing tube. By provision of the nozzles, the flow resistance is increased, and the refrigerant-flow rate is more uniform along the length direction of the distrusting tube. In addition, the refrigerant can be ejected along the radial direction, the axial direction, the circumferential direction, and other directions so that the uniformity of the refrigerant in the space outside the distributing tube is improved.