Stainless steel honeycomb type heat exchanger and vacuum brazing method thereof

Abstract

The invention discloses a stainless steel honeycomb type heat exchanger and a vacuum brazing method thereof.The brazing method comprises the steps: firstly, cleaning surfaces of heat exchanger components; secondly, coating the surfaces of all the components with brazing filler metal and then assembling the same by an assembly tool; and then putting the components into a vacuum furnace to be subjected to heat preservation and preheating so as to obtain good welding conditions, so that heat input in the welding process is ensured to be uniform and stable, finally brazing is conducted, and furnace cooling is conducted to the room temperature; the stainless steel honeycomb type heat exchanger is formed by splicing stainless steel profiles, so that the material utilization rate is high, and the cost is saved. The honeycomb type heat exchanger is formed through vacuum brazing fixing with small parts, so that the overall structure is simple. The round pipes and the triangular prisms are positioned and assembled through a tool after the outer frame is welded, vacuum one-time brazing forming is achieved, and the production efficiency is high; and brazing seam tissues are uniform, and the component structural strength is high.

Description

Technical field[0001]The present invention relates to the field of heat sink processing, and more particularly to a stainless steel honeycomb heat exchanger and a vacuum brazing method thereof.Background technique[0002]The heat exchanger plays a pivotal role in product quality, energy utilization and system economy in the field of national economy and chemical production. The honeycomb heat exchanger has a compact structure and high heat exchange efficiency. It has important research value.[0003]The honeycomb member is the main component of the stainless steel honeycomb heat exchanger, and the processing method includes deep hole processing, laser punching method, a hole plate overlapping method, and overall casting. The technical difficulty of deep hole processing is high, high cost, high material consumption, low production efficiency; the laser punching method is small and the depth is shallow; the structure strength of the components of the well plate replacement method is not h...

AI Technical Summary

Problems solved by technology

The technical difficulty of deep hole processing is high, the cost is high, the material consumption is large, and the production efficiency is low; the laser drilling method has a small hole diameter and shallow depth; the components processed by the hole plate cascading method have low structural strength and high cost ; The cost of the overall casting molding method is high, the structure is uneven, and defects such as pores are prone to occur

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