Suction pump used in combination with fresh-keeping box

Abstract

The invention discloses a suction pump used in combination with a fresh-keeping box. The suction pump comprises a handle, a pull rod, a seal ring, a pump body and a suction nozzle, wherein the pull rod is arranged in the inner cavity of the pump body; a piston body is arranged at one end of the pull rod; the piston body is provided with a groove; the seal ring is arranged in the groove; the other end of the pull rod penetrates through the pump body and is connected with the handle; an exhaust hole is formed in the closed end of the pump body; the suction nozzle is arranged at the other end of the pump body; air inlet holes are formed in the closed end of the suction nozzle; and a ring-shaped opening matched with one of ring-shaped grooves on a box cover is formed in the other end of the suction nozzle. During use, air in the fresh-keeping box is pumped out by virtue of the suction pump to create a vacuum in the fresh-keeping box, and the vacuum is maintained in the fresh-keeping box, so that food can be completely isolated from air, and oxidation of the food slows down to prolong the fresh-keeping time; besides, the suction pump is simple in structure, convenient to use, easy to produce and install and high in practicability.

Description

technical field [0001] The invention relates to an air extractor, in particular to an air extractor used in conjunction with a fresh-keeping box. Background technique [0002] In the prior art, the fresh-keeping box is generally a sealed box, which relies on sealing the box body to block the air inside and outside the box, so as to achieve the purpose of fresh-keeping. However, in this structure of fresh-keeping box, although the air inside and outside the box does not communicate with each other, there will be air inside the box, and the oxygen in the air will oxidize the food in the box, thus affecting the preservation of food, and the fresh-keeping time is also limited. ; and the fresh-keeping box needs to extract air to make the fresh-keeping box form a vacuum to keep the food fresh, and this type of fresh-keeping box needs to use a specific structure of the air pump. Contents of the invention [0003] The purpose of the present invention is to overcome the deficienci...

AI Technical Summary

Problems solved by technology

However, in this structure of fresh-keeping box, although the air inside and outside the box does not communicate with each other, there will be air inside the box, and the oxygen in the air will oxidize the food in the box, thus affecting the preservation of food, and the fresh-keeping time is also limited. ; and the fresh-keeping box needs to pump out the air to make the fresh-keeping box form a vacuum in order to achieve food preservation, and this type of fresh-keeping box needs to use a specific structure of the pump

Images