Heat exchange core with flow guide switching section, heat exchanger and machining method

Abstract

The invention discloses a heat exchange core with a flow guide switching section, a heat exchanger and a machining method. The heat exchange core comprises a plurality of stacked heat exchange units, and each heat exchange unit comprises a first heat exchange plate, a second heat exchange plate and a partition plate; sealing edges are arranged on the peripheries of the first heat exchange plates, and fins are arranged in the sealing edges; first liquid collecting pipes which are opposite in position and second liquid collecting pipes which are opposite in position are arranged on the peripheries of the first heat exchange plates; the second heat exchange plates and the first heat exchange plates are the same in structure, the positions of the second heat exchange plates and the first heat exchange plates rotate horizontally, so that flow channels of the first heat exchange plates and the second heat exchange plates are arranged in a cross flow mode, and the corresponding liquid collecting pipes are aligned; and the partition plates are arranged on the sides, provided with the fins, of the first heat exchange plates and the second heat exchange plates. The liquid collecting pipes at the inlet and the outlet and the heat exchange plates are integrally machined, the pipelines are externally connected with the heat exchange core through the cover plate, the influence of welding high temperature on the precision structure of core plates is avoided, and meanwhile fluid flows and is distributed more evenly at the inlet of the core.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and relates to a heat exchange core body with a flow guiding transition section, a heat exchanger and a processing method. Background technique [0002] Heat exchangers play an indispensable role in many industrial production fields today. Through their structural characteristics, heat exchangers enable heat exchange between hot fluid and cold fluid to achieve energy recovery and utilization. The usual plate or plate-fin heat exchanger is composed of partitions, heat exchange channels, frame seals and other structures, and is produced and processed by stacking, assembling and welding. For the laminated heat exchanger with tiny channels, inlets and outlets are set up for different working fluids in the small plate space, and the liquid collection device is welded outside the core. After being collected by the liquid collection device, it flows into or discharges from the heat exchanger core....

AI Technical Summary

Problems solved by technology

[0004] Most of the diversion optimizations for heat exchanger flow distribution are added or optimized for the inside of the liquid header, liquid collection chamber or head structure, but they are all for larger-sized heat exchanger structures, and their collection The liquid pipe is relatively large, and its shape is close to a semi-cylindrical. The internal flow guide structure is also manufactured by welding or CNC machining. This method is not suitable for compact heat exchangers with tiny channels. Usually, the core and The liquid collecting pipe is separately processed and manufactured, and then connected and assembled by argon arc welding, which requires many procedures and high cost

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