Rhythmic vacuum purification nitrogen protection brazing furnace

Abstract

The invention provides a rhythmic vacuum purification nitrogen protection brazing furnace which comprises a brazing chamber, a guide rail and a control panel. A thermostat is arranged in the brazing chamber; an access port is formed in the side surface of the brazing chamber; a vacuum purification chamber is connected to the access port of the brazing chamber; openings are formed in two sides of the vacuum purification chamber; a first furnace door is arranged between the opening close to the brazing chamber and the access port; a second furnace door is arranged on the opening far away from the brazing chamber; a nitrogen filling pipeline is further arranged in the vacuum purification chamber; the guide rail is used for connecting the brazing chamber and the vacuum purification chamber; aconveying vehicle for conveying a product is slidably connected onto the guide rail and is connected with a drive device; the guide rail extends out of the second furnace door and forms a feeding andblanking area; an air cooling device is further arranged beside the feeding and blanking area; and the control panel is used for controlling the devices. The rhythmic vacuum purification nitrogen protection brazing furnace provided by the invention has the advantages of high brazing quality and the like.

Description

technical field [0001] The invention relates to the technical field of flux pre-coating, in particular to a rhythmic vacuum purification nitrogen protection brazing furnace. Background technique [0002] The brazing furnaces in the prior art generally include two types: continuous nitrogen shielded brazing furnaces and vacuum brazing furnaces. The continuous nitrogen shielded brazing furnace can be used for mass production of aluminum heat exchangers, which can obtain higher economic benefits, but the products produced in this way cannot meet the higher requirements for brazing quality, and the aluminum brazing temperature is generally at At about 577°C, the requirement for the oxygen concentration in the brazing environment is not higher than 50ppm. The lower the oxygen concentration, the better the brazing quality, but it is difficult to achieve it with the existing technology. [0003] In addition, in the field of brazing of aluminum heat exchangers, vacuum brazing furna...

AI Technical Summary

Problems solved by technology

The continuous nitrogen shielded brazing furnace can be used for mass production of aluminum heat exchangers, which can obtain higher economic benefits, but the products produced in this way cannot meet the higher requirements for brazing quality, and the aluminum brazing temperature is generally at At around 577°C, the requirement for the oxygen concentration in the brazing environment is not higher than 50ppm. The lower the oxygen concentration, the better the brazing quality, but it is difficult to achieve it with the existing technology

[0003] In addition, in the field of brazing of aluminum heat exchangers, vacuum brazing furnaces are also widely used. Vacuum brazing furnaces can obtain higher brazing quality, but the aluminum heat And then lower the temperature to room temperature. This process is completed in the furnace of the vacuum brazing furnace. The heat cannot be recycled, and the energy consumption is quite large, which makes the use cost too high

[0004] Summarize the shortcomings of the above two prior art as follows: 1. The quality of brazing is average; 2. The heat cannot be recycled, the loss is too large, and the cost is too high; 3. The oxygen concentration of the brazing environment cannot meet the requirements

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