Negative pressure drainage device

The utility model discloses a negative pressure drainage apparatus, which relates to the drainage apparatus field, and comprises a housing, a piston cylinder and a negative pressure cavity, the negative pressure cavity is communicated with the piston cylinder, and the negative pressure cavity is internally provided with a liquid inlet, a liquid outlet and an extraction opening which are arranged in a staggered manner. And a partition plate for preventing the extraction opening and the liquid inlet from being directly communicated is arranged between the extraction opening and the liquid inlet. The utility model has the advantages of easy cleaning, safety and sanitation. 本实用新型公开了负压引流器，涉及引流器领域，其包括壳体、活塞缸以及负压腔，所述负压腔与活塞缸之间相互连通，所述负压腔内设有相互错位设置的进液口、出液口以及抽气口，所述抽气口与进液口之间设有防止抽气口和进液口直接连通的隔板。本实用新型具有容易清洗，安全卫生的优点。