| 摘要 |
A snow removal apparatus for plastic greenhouse(vinyl house) is provided, which removes snow on the roof to prevent the collapse of the green house and minimize freeze damage and controls the temperature and humidity of the green house's interior by supplying water. The snow removal apparatus comprises: an outdoor water injection pipe(6) to inject hot water at a predetermined pressure; an indoor water injection pipe(7) to control the temperature and humidity inside the greenhouse and to supply water to plants ; a hot water feed pump(5) to supply hot water at a predetermined pressure to the outdoor water injection pipe; a heater(4) to generate hot water; a hot water temperature sensor(9) to measure the temperature of hot water; a control valve(8) to control the supply of hot water; a control part(3) to control the heater, hot water feed pump, control valve and hot water temperature sensor; a snowfall sensor(1) to transmit information about snowfall outside the greenhouse; and a snow depth sensor(2) to measure snow depth on the roof and to generate alarm signals. Two injection nozzles are installed on the roof to make a predetermined angle and to satisfy an equation of the form n=(d/D)x2, wherein D is the total length of the outdoor injection pipe; and d is the distance between the injection nozzles.
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