Cooling and afterheat recovering device of air-cooled oil-injected screw air compressor

Abstract

The invention belongs to the category of heat exchange devices of air compressors, in particular to a cooling and afterheat recovering device of an air-cooled oil-injected screw air compressor, comprising a radiator fan, an oil heat radiator, a heat exchanger, a cold water pipe, a hot water pipe, a water pump and a valve. The cooling and afterheat recovering device of the air-cooled oil-injected screw air compressor is characterized by comprising a transformer which is provided with a temperature sensor and connected in series in a power supply circuit of the radiator fan of the air compressor, the heat exchanger of a brazing sheet type is connected in series between an oil outlet of an oil-gas separator and an oil inlet of the oil heat radiator of the air compressor, the temperature sensor is arranged on an oil outlet of the oil heat radiator of the air compressor, and the frequency of a current output by the transformer is controlled to change in a range of 15 Hz to 50 Hz according to the temperature of the oil outlet.

Description

Technical field: [0001] The invention belongs to the category of heat exchange devices for air compressors, in particular to cooling and waste heat recovery devices for air-cooled oil-injected screw air compressors. Background technique: [0002] Air compressors can provide kinetic energy for a variety of operating machinery, so they are widely used in the industrial field. Among various types of air compressors, especially for high-power air compressors, air-cooled oil-injected screw air compressors with simple structure and high pressure are often used. The oil not only acts as a seal and lubricates the oil-injected screw air compressor during work, but also absorbs and takes away the heat generated by the compressed air to prevent the overheating of the air compressor from shutting down and other components from being damaged. For the air compressor, 80% of its input energy will be converted into heat energy during the compression process, while the air-cooled oil-inject...

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Problems solved by technology

[0004] The present invention is to provide an air-cooled oil-injected screw air compressor heat dissipation and waste heat recovery device, which solves the problem of high compressed air temperature caused by the intermittent work of the heat dissipation fan, reduced service life of parts, and high noise during machine operation of the air compressor. As well as the technical problems of the waste heat recovery device with numerous components, large volume, and complex piping

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