US 12,221,240 B2
Vacuum packaging method and vacuum packaging device
Guoqiang Liang, Guangdong (CN); Zhicun Yin, Guangdong (CN); and Changhui Lu, Guangdong (CN)
Assigned to GUANGZHOU ARGION ELECTRIC APPLIANCE CO., LTD., Guangzhou (CN)
Appl. No. 18/270,246
Filed by GUANGZHOU ARGION ELECTRIC APPLIANCE CO., LTD., Guangdong (CN)
PCT Filed Oct. 20, 2021, PCT No. PCT/CN2021/124866
§ 371(c)(1), (2) Date Jun. 29, 2023,
PCT Pub. No. WO2022/142604, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 202011644594.1 (CN), filed on Dec. 31, 2020.
Prior Publication US 2024/0059441 A1, Feb. 22, 2024
Int. Cl. B65B 31/02 (2006.01); B65B 51/10 (2006.01); B65B 57/00 (2006.01)
CPC B65B 31/02 (2013.01) [B65B 51/10 (2013.01); B65B 57/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vacuum packaging method, comprising steps of:
acquiring size information of a package and selecting a suction constant b;
controlling a door to seal a vacuum chamber after the package is disposed into the vacuum chamber;
actuating a vacuum pump set and starting timing, and recording time node t1 when a pressure detected inside the vacuum chamber is lowered to a first preset pressure P1;
continuously performing suction by means of the vacuum pump set, and recording time node t2 when the pressure detected inside the vacuum chamber is lowered to a second preset pressure P2;
calculating time difference Δt by a formula Δt=t2−t1 based on t1 and t2;
obtaining total suction time T or suction-stopping pressure P based on Δt and b, wherein the total suction time T is obtained by calculating a formula T=Δt*K+b based on Δt and b, wherein K is an empirical coefficient;
continuously performing suction by means of the vacuum pump set, and controlling the vacuum pump set to stop suction once a suction time reaches T or the pressure inside the vacuum chamber is lowered to P;
controlling a heater to finish heat-sealing.