Abstract: At present, most of the high-end thin-wall refrigerators launched on the market use vacuum insulation panels to reduce the foam layer thickness of the box and door body to achieve the purpose of reducing product power consumption and improving product volume ratio. However, the vacuum insulation board is expensive and easily damaged, and a large number of protective measures are required during the manufacture of the refrigerator. In order to achieve easy manufacturing, lower cost and improve product competitiveness, the research aims to achieve the original performance without changing the foam layer thickness of the box after removing the vacuum insulation board. After the vacuum insulation board is cancelled, the cooling leakage of the box is bound to increase, and problems such as not being able to achieve level 1 energy efficiency, non-standard high-ring temperature storage temperature, and unqualified condensation occur. The method of theoretical analysis and practical test is used to improve the cooling efficiency, reduce the standby power consumption, and reduce the leakage of the box door seal. The test results show that the power consumption of the whole machine increases by about 8% after the vacuum insulation board is canceled, and the power consumption of the whole machine decreases by about 8% after the optimization design, and the goal of level 1 energy efficiency is achieved. The storage temperature and condensation test were improved from unqualified to qualified, and finally achieved various performance and reliability indicators. The research scheme provides an optimization idea for the vacuum insulation board of the box, and can also be used as a reference when the performance of the product is improved.

Key words: Vacuum Insulation Panel, Power consumption, Storage temperature, Condensation