Vacuum air extraction device with high practicality and reliability

A vacuum air extraction device with high practicality and reliability, comprising an air extraction host machine and a vacuum sucker in matching connection to a lower part of the air extraction host machine;

• a control circuit board, a vacuum air pump and a decompression valve are arranged in the air extraction host machine, and the vacuum air pump, the decompression valve and the control circuit board are electrically connected, wherein
• the vacuum sucker is hollow inside to form an air circulation channel for air extraction;
• a plastic air extraction connector with high adaptability is connected to the other end of the air extraction host machine relative to the vacuum sucker;
• an annular groove body is formed in one end connected to the air extraction host machine, of the vacuum sucker;
• a spongy body for filtering air is arranged in the annular groove body;
• air extracted through the air extraction host machine passes through the air circulation channel to enter the annular groove body, is filtered at the spongy body, and then flows into the vacuum air pump;
• the vacuum air extraction device with high practicality and reliability further comprises an air extraction hole and a drain hole which are formed in a lower side of the air extraction host machine;
• the vacuum air pump communicates with the air extraction hole through a first pipeline, and communicates with the drain hole through a second pipeline;
• and condensed water generated during an air extraction process is drained out of the air extraction host machine;
• an inner convex part is integrally formed at one end towards the air extraction connector, on an inner side of the vacuum sucker;
• the inner convex part and an inner wall of the vacuum sucker jointly form a water storage tank body for storing a certain amount of condensed water;
• a blocking block for blocking air from flowing upwards quickly is further arranged on an upper side of an inner convex part;
• and
• a communicating hole communicating with the annular groove body is formed in the air circulation channel of the vacuum sucker;
• and air flows into the annular groove body through the communicating hole from the air circulation channel.