Mechanical automatic frost scraping device for circular finned tube evaporators

Abstract

The invention discloses a mechanical automatic frog scraping device suitable for a circular finned pipe evaporator. The mechanical automatic frog scraping device comprises a rectangular corrugated scrapping plate, wherein the scraping plate coats one side of a circular finned pipe and is formed by welding angle steels, openings of the angle steels face outwards, and the edge parts of the angle steels are opposite to the circular finned pipe; a driving mechanism is arranged at each of the two ends of the scraping plate, each driving mechanism comprises a driven gear, a driving gear and a motor, the driven gear is fixedly connected with the end part of the scraping plate, the driving gear is meshed with the driven gear, the motor drives the driving gear and is mounted on a case of an evaporator, the driven gear is mounted on a fixed sleeve, and the fixed sleeve sleeves a pipeline of the circular finned pipe hollowly and is fixedly connected with the case of the evaporator. According to the mechanical automatic frog scraping device suitable for the circular finned pipe evaporator, frog removal can be realized immediately and effectively, the normal operation of a refrigeration system is not influenced, and influence to the indoor temperature and humidity is avoided.

Description

technical field [0001] The invention belongs to the fields of heat pumps, refrigeration, air conditioning, freezing and refrigeration, and in particular relates to a mechanical automatic defrosting device suitable for circular finned tube evaporators. Background technique [0002] The evaporator is one of the important equipment of the heat pump, air conditioner and refrigeration system. The heat transfer performance of the evaporator directly affects the overall cooling or heating effect of the system. Most traditional evaporators use flat plate-fin heat exchangers, which have the advantage of high heat transfer efficiency, but the disadvantage is that they are easy to block and not suitable for cleaning. Plate-fin evaporators are prone to frost in low-temperature and high-humidity environments. The frost layer will reduce the heat exchange efficiency of the heat exchanger and increase the energy consumption of the compressor unit and the blower. Therefore, it is necessary ...

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Problems solved by technology

The traditional defrosting methods include electric heating defrosting, hot fluorine bypass defrosting, hot water spray defrosting, etc. The disadvantage is that during the defrosting process, a large amount of waste heat and water vapor after defrosting enter the room, not only It will cause the indoor temperature to rise rapidly, increase the extra energy consumption of the system, and is not conducive to the storage of fruits and vegetables in cold storage, and the increase of indoor humidity will accelerate the rate of frosting of the evaporator again. It is of great significance to meet the timely and effective defrosting method without affecting

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