In order to achieve good thermal insulation properties, Upright Showcase must select the right raw materials to control the bulk density and cell diameter in the optimal range. The vertical freezer has a larger effective volume. The technical parameters of high-quality vertical freezer and vertical freezer are all in accordance with the requirements of international standards, and have passed the sampling inspections by the State Quality and Technical Supervision Agency over the years. The high-quality vertical freezer and China Home Appliance all use commercial compressors.