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Induction Brazing of Automobile Air Conditioning Pipe Fittings

  Automobile air conditioners are generally mainly composed of compressors, electronically controlled clutches, condensers, evaporators, expansion valves, receiver driers, pipes, hoses, condensing fans, and vacuum liquid storage and drying. It is composed of a receiver driver, hoses, condensing fan, vacuum solenoid valve, idle speed device, and control system. Automotive air conditioners are divided into high-pressure pipelines and low-pressure pipelines. The high pressure side includes compressor output side, high pressure pipeline, condenser, liquid receiver dryer, and liquid pipeline. The low pressure side includes evaporator accumulator return pipe, liquid receiver dryer, and liquid pipeline; the low pressure side includes evaporator, accumulator, and liquid pipeline compressor, return line, compressor input side, and compressor oil sump.

FIG. 1 Automobile air conditioning system

Automobile air conditioning system The Leading Induction Heating Machine Manufacturer Induction Brazing of Automobile Air Conditioning Pipe Fittings

  In 2009, Zhengzhou KETCHAN proposed the high-precision digital control method of DSP+ARM+AWP in response to the problem that the workpiece is easily over-burned due to the too small difference between the liquidus line of the base material and the solder in the induction brazing of aluminum auto air-conditioning parts. the solution, and obtained an invention patent and 3 utility model patents in this welding field.

  In view of the welding corrosion problem in the induction brazing process of the aluminum automobile air-conditioning parts, in 2010, a solution method of cesium-containing flux-cored solder with multi-stage warm heating was proposed, and an invention patent was obtained in this welding field, a utility model 2 patents.

  In 2011, Zhengzhou Ketchan proposed a solution for adding a thermal insulation system to the digital control system in response to the problem of post-weld porosity during induction brazing of aluminum auto air-conditioning parts and obtained an invention patent in this field of welding, 2 utility model patents.

  In 2012, Zhengzhou Ketchan proposed the solution of adding an infrared mode to digital control and real-time monitoring of infrared thermometer in response to the problem of local over-burning caused by uneven heating during induction brazing of complex aluminum auto air-conditioning parts. , and obtained one invention patent and one utility model patent in this welding field.

  In 2013, Zhengzhou Ketchan proposed a solution for the storage of process parameters of multiple workpieces in response to the problem of various types of aluminum auto air-conditioning accessories. This method can simultaneously store up to 99 workpiece process parameters and has won 1 in this welding field. A utility model patent.
  In 2015, Zhengzhou Ketchan proposed a solution to the problem of workpiece positioning accuracy, workpiece positioning wear, and tool positioning heating in aluminum auto air-conditioning parts, and obtained 2 utility model patents in this welding field.

  In 2016, Zhengzhou Ketchan proposed the solution of adding two-dimensional code intelligent scanning in digital closed-loop control in response to the problem of operators using wrong process parameters due to the wide variety and similar specifications in the production process of aluminum auto air-conditioning parts and obtained an invention patent and 2 utility model patents in this welding field.

  The components that can be brazed by our company’s digital high-frequency induction brazing machine in the automotive air conditioner are: copper-iron at the compressor outlet, the aluminum interface of the accumulator dryer, aluminum pipe and aluminum pipe in the pipeline, aluminum pipe and joint, single Tube pressure plate, double tube pressure plate, condenser evaporator lead-out pipe, muffler, aluminum distributor, etc. Compared with traditional models, new energy vehicles have added a micro-channel water cooling belt part to cool the battery.

Induction Brazing of Automobile Air Conditioning Pipe Fittings The Leading Induction Heating Machine Manufacturer Induction Brazing of Automobile Air Conditioning Pipe Fittings

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