Air extracting pump module and refrigerating and freezing device

Abstract

The invention relates to an air extracting pump module and a refrigerating and freezing device. The air extracting pump module comprises a sealing box; the sealing box comprises a lower box body with an opened upper side, and an upper box body with an opened lower side; the upper box body tightly covers the upper side of the lower box body to define sealed space with the lower box body; an air extracting pump is arranged in the sealed space of the sealing box; an intake pipe and an exhaust pipe of the air extracting pump both upwards extend; an intake connecting pipe and an exhaust connecting pipe are embedded in the upper box body, and both extend in the up-down direction; the intake connecting pipe is positioned rightly above the intake pipe, and is sleeved on the intake pipe; and the exhaust connecting pipe is positioned rightly above the exhaust pipe, and is sleeved on the exhaust pipe. The air extracting pump module can reduce outward propagation of noise in operation of the air extracting pump, and can be convenient to dismount the upper box body onto the lower box body.

Description

technical field [0001] The invention relates to the technical field of refrigerator storage, in particular to an air suction pump assembly and a refrigerating and freezing device. Background technique [0002] With the improvement of the quality of life, consumers have higher and higher requirements for food preservation in refrigeration and freezing devices such as refrigerators and freezers. Modified atmosphere preservation technology generally refers to the technology of prolonging the life of food storage by adjusting the gas atmosphere (gas composition ratio or gas pressure) in the closed space where the storage is located. The basic principle is: in a certain closed space A gas atmosphere different from normal air components is obtained through various adjustment methods to inhibit the physiological and biochemical processes and microbial activities that cause the storage (usually food) to deteriorate. In particular, in this application, the discussed modified atmosph...

AI Technical Summary

Problems solved by technology

But until now, due to the large size and high cost of nitrogen-generating equipment traditionally used for controlled atmosphere preservation, this technology has basically been limited to use in various large-scale professional storages (storage capacity is generally at least 30 tons or more).

It can be said that what kind of appropriate gas adjustment technology and corresponding devices can be used to economically mini...

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