Micro-fin type heat exchange device

Abstract

The invention relates to the technical field of heat exchangers, in particular to a micro-fin type heat exchange device. The micro-fin type heat exchange device comprises one or more groups of heat exchange cores, wherein each heat exchange core comprises a micro-channel plane plate and a sealing panel arranged on the micro-channel plane plate, a plurality of flow channels are arranged on the micro-channel plane plate at intervals, and one or more groups of heat transfer mechanisms connected with the side walls of the heat exchange cores are arranged on the outer side walls of the heat exchange cores. The micro-fin type heat exchange device is reasonable in structural design, the sizes of flow channels are increased, and the flowing resistance of fluid is effectively reduced, so that the fluid has better flowability, the situation that the fluid is adhered in the flow channels of the micro-channel plane plates due to high viscosity of the fluid or blockage or increased pressure loss is caused due to the fact that the fluid contains ash, impurities, particles and the like is avoided, and therefore the fluid can flow smoothly; in addition, on the basis of ensuring that the micro-channel plane plates meet pressure-bearing strength requirements, the utilization rate of a heat transfer surface area is improved, heat transfer efficiency is improved, and problems in the prior art are solved.

Description

Technical field: [0001] The invention relates to the technical field of heat exchangers, in particular to a micro-fin heat exchange device. Background technique: [0002] Microchannel heat exchanger (English abbreviation: MCHE) is a new type of high-efficiency heat exchanger composed of heat exchange core, head, connection pipe and flange. It has high compactness, small size, high structural strength, The heat exchanger has the characteristics of high efficiency, high temperature and pressure bearing capacity (up to 100MPa or more), and heat exchange channels can be designed. The heat exchange core of MCHE is packaged as a whole by alternately placing hot and cold plates processed with flow channels, and fixed together by diffusion welding. A single heat exchanger can meet different heat exchange requirements by connecting multiple heat exchange cores in parallel. heat demand. MCHE was first used in the aerospace and aviation fields for the cooling of some surfaces of airc...

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Problems solved by technology

However, in order to ensure a certain pressure-bearing strength of the micro-channel planar plate, the pore diameter of each flow channel is designed to be thinner, which leads to an increase in fluid flow resistance, which in turn makes the fluidity of the fluid poorer, and the fluid is likely to stick to the micro-channel over time. On the flow channel of the flat plate, in severe cases, even blockage will occur; and the heat transfer between the flow channels is realized through the micro-channel flat plate, and the micro-channel flat plate is thicker, although it can ensure better pressure bearing Strength, but the utilization rate of the heat transfer surface area is low, so that the overall heat transfer effect is wasted on the thickness of the microchannel flat plate, and the heat transfer efficiency is low

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