REFRIGERATOR

WIPO Patent Application WO/2021/227420

A1

The present application provides a refrigerator, comprising a low-temperature storage chamber defined by a liner, a low-pressure storage unit located in the low-temperature storage chamber, and a vacuum pump. The vacuum pump is communicated with the low-pressure storage unit, and has an air discharge pipe and an air suction pipe communicated with the low-pressure storage unit; the air discharge pipe is connected to a second pipeline, the second pipeline comprises a first pipe section, a second pipe section, and a third pipe section which are sequentially communicated with each other, and the first pipe section is connected to the air discharge pipe; the lengths of the first pipe section, the second pipe section, and the third pipe section are sequentially denoted as L1, L2, and L3, and the pipe diameters thereof are denoted as D1, D2, and D3, wherein L1