Structure of strong cooling system for vacuum heat treatment furnace
In recent years, due to the rapid development of vacuum heat treatment furnace, great breakthroughs have been made in vacuum brazing, vacuum sintering, vacuum annealing and other heat treatment processes. In many vacuum heat treatment processes, high temperature rapid cooling process is required, which makes the strong cooling system become a necessary structural component of most vacuum heat treatment furnaces. The structure of the strong cooling system of the vacuum heat treatment furnace is generally composed of three parts: the fan, the heat exchanger and the cooling air duct. The structural types of the strong cooling system can be generally divided into two types: internal circulation and external circulation. It is necessary to choose the structure type of the strong cooling system according to different furnace type and technical requirements. The structure type and design scheme of the two kinds of strong cooling systems are introduced respectively. Strong cooling system structure type Strong cooling system structure type Strong cooling system structure type Strong cooling system can be divided into internal circulation and external circulation according to the structure type. For the internal circulation strong cooling system, the whole structure is in the vacuum chamber inside, using the insulation layer and the structure between the shell to form a circulating cooling duct, this structure is compact, the whole structure occupies The utility model has the advantages of small space and low cost, and is generally suitable for small vacuum furnaces. The external circulation strong cooling system is connected with the whole strong cooling system outside the vacuum chamber. The pipe, valve and vacuum chamber are connected to form the circulating cooling air duct. The cooling rate of this structure is faster, and it can be applied to the vacuum heat treatment furnace with large volume and certain cooling speed requirements. Thus the volume and cost of the vacuum furnace are increased correspondingly. .
The design of strong cooling system is divided into three parts: fan design, heat exchanger design and cooling duct design. A qualified strong cooling system should meet the qualified conditions of three parts at the same time.
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