Method for drying hermetic compressor by ohmic heating
A technology of heating, drying and compressors, which is applied in the direction of mechanical equipment, machines/engines, liquid variable capacity machines, etc. It can solve the problems of closed compressors that have not been seen yet, and achieve the effects of saving manpower, good drying effect, and energy saving
Inactive Publication Date: 2011-09-14
SHANGHAI NORMAL UNIVERSITY
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Problems solved by technology
After extensively retrieving domestic and foreign patent documents and consulting open publications, there is no new method for energizing and drying the hermetic compressor that is identical to the technical solution of the present invention
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[0020] The present invention will be further described through specific embodiments below in conjunction with the accompanying drawings.
[0021] The input power of the system is 50HZ, 380V single-phase AC power supply, the thyristor voltage regulating transformer is controlled by an industrial control computer with a 4-20mA analog signal, and the load is continuously adjustable within the range of 0-60V. The winding temperature adopts advanced live winding temperature rise detection technology, which can measure the winding temperature in real time without cutting off the winding power supply. Humidity detection uses a high-precision humidity detector, which can detect the humidity inside the compressor from the nitrogen discharged from the compressor. The system uses an industrial control computer as the main controller, collects external signals and states through AD and AI units, and sends control signals through DA and DO units.
[0022] The automatic control process is ...
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The invention relates to a method for drying a hermetic compressor by ohmic heating and belongs to the mechanotronics technology field. Dryness of a compressor is directly related to normal working of a refrigerating system, and the whole compressor is placed into a dry box for drying in the prior art, which has the disadvantages of great energy consumption, low drying efficiency and poor drying effect. In the drying method, low-voltage AC is led into windings of a motor of the compressor, and a closed shell is heated by heat generation of the windings when operation of vacuumization and nitrogen gas introduction are performed to discharge vapor in the shell. An automatic-regulation silicon-controlled voltage-regulation transformer is adopted to supply heating power supply, thus realizingautomatic control of temperature in the shell. The compressor is then dried. The method has the following advantages of good drying effect due to simultaneous operation of heating and vacuumization, high electric energy utilization rate and energy saving due to energization in the windings, reduced drying operation time of single product and improved efficiency, and high automaticity and labor force saving.
Description
technical field [0001] The invention belongs to the mechatronics technology, and specifically relates to a method for heating and drying a sealed compressor with electricity. Background technique [0002] Air conditioners and refrigerators are household appliances commonly used in modern society. Many air conditioner and refrigerator compressors are hermetic or semi-hermetic refrigeration compressors, which seal the gas compression part and the rotor and stator of the motor in a shell, and then Condenser, evaporator, etc. make up the refrigeration system. The dryness of the compressor is directly related to whether the refrigeration system can work normally. Many domestic and foreign standards have strict regulations on the water content of the compressor, which requires that the compressor needs to be dried during the production process. The prior art is to put the whole compressor into a drying box for drying. However, this method consumes a lot of energy, has low drying...
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IPC IPC(8): F04B39/16
Inventor 李传江
Owner SHANGHAI NORMAL UNIVERSITY