A heat exchanger and a fin are provided. The heat exchanger includes: a fin. The fin includes a fin body and a flange, the fin body being provided with a heat exchange tube hole, the flange being provided on the fin body and surrounding the heat exchange tube hole; and a heat exchange tube passing through the heat exchange tube hole and connected to the flange. The flange includes a first sub-flange and a plurality of second sub-flanges, the first sub-flange is connected to the fin body, the plurality of second sub-flanges are connected to the first sub-flange and spaced apart from one another, and a height of the first sub-flange is less than a height of the second sub-flange.

A heat exchanger includes a plurality of flat heat transfer tubes each having a flat cross-sectional shape, a flat outer side surface, and an interior defining a passage through which a fluid flows, the plurality of flat heat transfer tubes being arranged with the flat outer side surfaces facing each other, and a plurality of corrugated fins each having a wavy shape, each of the plurality of corrugated fins being disposed between and joined to flat heat transfer tubes of the plurality of flat heat transfer tubes that are adjacent to each other. Each of the plurality of corrugated fins has portions that correspond to peaks of the wavy shape and have lower flexural rigidity than other portions of the corrugated fin.

A method includes providing a first metal sheet and a second metal sheet, printing a plurality of channels on the first metal sheet, bonding the first metal sheet and the second metal sheet to each other to obtain a fin body, bending a first portion of the fin body to be transverse to a second portion of the fin body, separating the first metal sheet and the second metal sheet from each other to form the plurality of channels, introducing working fluid in the plurality of channels, and sealing the first metal sheet and the second metal sheet.

An outer finned tube includes a tube body, an outer wall of the tube body is provided with outer fins spirally arranged in an extension direction of the tube body; grid fins are arranged between two adjacent spiral parts of the outer fins correspondingly; two ends of each grid fin are connected to the two adjacent spiral parts of the corresponding outer fin respectively; a gap is kept between each grid fin and the outer wall of the tube body; and the plurality of grid fins are spaced in the extension direction of the tube body. An enhancing cavity is formed in an area defined by the outer wall of the tube body, inner walls of the grid fins and the outer fins in an encircling way, which can form a larger degree of superheat, provides a nucleation point for a boiling/condensation process and improves a heat exchange performance.

A flue baffle for a water heater comprises a plurality of holes along a length of the baffle and a plurality of bent blades along the length of the baffle, where each hole of the plurality of holes is adjacent to a bent blade of the plurality of bent blades. The holes are configured to permit flue gas to pass through the holes. The bent blades can have an alternating pattern where a first bent blade extends from one side of the baffle and the next bent blade extends from an opposite side of the baffle. A press tool for forming the baffle comprises a piercing tool for forming the plurality of holes and a lance and fold die for forming the bent blades.

A processing apparatus includes an upper die assembly a lower die assembly and a driving mechanism. The upper die assembly includes a first cutter. The lower die assembly includes a second cutter and a lower die plate. The lower die plate has an upper end portion facing the upper die assembly. The second cutter includes a second cutting edge portion higher than the upper end portion. Further provided is a control method for the processing apparatus, and a heat exchanger.

Systems for cooling semiconductor devices that can comprise a heatsink and a cleaning element for the heatsink. The heatsink can have fins spaced apart from each other by channels. The cleaning element can have a base and one or more arms extending from the base. The cleaning element can be positioned with respect to the heatsink such that each arm is aligned with a corresponding channel between the fins, and the arms are moveable between a flow configuration in which the arms are in the channels and a cleaning configuration in which the arms are outside of the channels.

An air conditioner fin assembly automatic tube expansion system based on a digital bus includes: a tube expander, a fin assembly load-fetching device, a fin accompanying tooling, interactive exchange trays, a controlled material trolley, and an electrical control device. The fin assembly load-fetching device includes an X-coordinate driving mechanism, a Y-coordinate driving mechanism, a Z-coordinate driving mechanism, and a mechanical arm including a coordinate rotating mechanism assembly and a load-fetching mechanical arm. The fin accompanying tooling is configured between the tube expander and the fin assembly load-fetching device. At least two interactive exchange trays are configured and clamped to the fin accompanying tooling. At least two controlled material trolleys are included and docked on an inner or an external side of the fin assembly load-fetching device.

A flue baffle for a water heater comprises a plurality of holes along a length of the baffle and a plurality of bent blades along the length of the baffle, where each hole of the plurality of holes is adjacent to a bent blade of the plurality of bent blades. The holes are configured to permit flue gas to pass through the holes. The bent blades can have an alternating pattern where a first bent blade extends from one side of the baffle and the next bent blade extends from an opposite side of the baffle. A press tool for forming the baffle comprises a piercing tool for forming the plurality of holes and a lance and fold die for forming the bent blades.

A method includes providing a first metal sheet and a second metal sheet, printing patterns of a plurality of obstructers, a plurality of channels, an evaporator channel, a condenser channel, and a connecting channel on the first metal sheet, bonding the first metal sheet and the second metal sheet to each other, separating the first metal sheet and the second metal sheet from each other to form the plurality of channels, the evaporator channel, the condenser channel, and the connecting channel by introducing a fluid between the first metal sheet and the second metal sheet, introducing working fluid in the plurality of channels, and sealing the first metal sheet and the second metal sheet.