| 摘要 |
An automatic fertilizing apparatus ( 10 ) connected in series with a watering system ( 150 ) that includes a water source ( 152 ) and a sprinkler head(s) ( 158 ). The apparatus ( 10 ) consists of a liquid fertilizer container ( 12 ) having a water inlet port ( 20 ) and a water/fertilizer outlet port ( 24 ), and a fertilizing control assembly ( 50 ) having an outer fertilizer control tube ( 52 ) and an inner fertilizer control tube ( 82 ). The tube ( 52 ) which includes an outlet fertilizer entry slot ( 54 ) is inserted through the port ( 20 ) and the port ( 24 ) and is fixedly attached therethrough. The tube ( 82 ) is rotatably inserted into the tube ( 52 ) and includes an inner fertilizer entry slot ( 84 ), an inlet end ( 86 ) connected to the water source ( 152 ), an outlet end ( 88 ) connected to the sprinkler head(s) ( 158 ) and a vortex tube ( 87 ). The vortex tube ( 87 ) produces a partial vacuum that allows the fertilizer to be drawn into the two slots ( 54,84 ) and enter the water stream from the water source ( 152 ), through the two tubes ( 52,82 ) and out the sprinkler heads(s) ( 158 ).
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