The dual refrigeration technology of the refrigerator solves the technical problem that a single refrigeration method is difficult to overcome, and there is no refrigeration blind spot inside the cabinet. 500mm ultra wide shelf provides customers with a larger effective display area and more inventory. The Osram dedicated light tubes placed at the front of each shelf enhance the display effect of the items inside the cabinet. The integrated foam and sturdy steel frame foundation of the refrigerator make the insulation performance of the cabinet body better and the structure more sturdy and durable. The corrosion-resistant color steel plate inner liner of the cabinet increases its service life. The fully transparent glass side panel of the refrigerator makes the items inside the cabinet clear at a glance, enhancing the display effect of the items inside the cabinet. The digital temperature controller controlled by a microcomputer makes the temperature control of the items in the cabinet more accurate and the system more energy-efficient. The refrigeration load of the freezer refrigeration room is the amount of heat that must be taken out of the refrigeration room per unit time; Or it is the cooling capacity obtained from the refrigerator in a unit time in the refrigeration room. The purpose of calculating the refrigeration load of a refrigeration room is to accurately and reasonably determine the cooling equipment load and mechanical load of each refrigeration room. The cooling load of a cold room is not constant throughout the year, and its magnitude is influenced by various factors. For example, the changes in external environmental temperature, the amount of food stored in the cold room, the differences in cold processing volume of food during the off-season and peak seasons, and many factors related to operation and management methods, usually calculating the refrigeration load is one of the initial tasks in designing refrigeration devices for cold storage. So it is very important for refrigeration design to determine the refrigeration load of the refrigeration room reasonably. When calculating the refrigeration load of a refrigerator, the most unfavorable working conditions should be considered. This is the principle of outdoor calculation. For rooms that transfer heat from indoor to outdoor, considering the outdoor temperature during the hot season; For rooms with heat transfer from indoor to outdoor, the outdoor temperature during the cold season should be considered. The cold rooms of cold storage mostly belong to the type of heat transfer from indoor to outdoor. Relevant national standards GB 4706.1-2005 "Safety of Household and Similar Electrical Appliances - Part 1: General Requirements", GB 4706.13-2014 "Safety of Household and Similar Electrical Appliances - Special Requirements for Refrigerating Appliances, Ice Cream Machines, and Ice Makers", GB 12021.2-2008 "Limits for Power Consumption and Energy Efficiency Levels of Household Refrigerators", GB 19606-2004 "Noise Limits for Household and Similar Electrical Appliances" GB/T 8059.1-1995 "Household Refrigeration Appliances Refrigerators", GB/T 8059.2-1995 "Household Refrigeration Appliances Refrigerators", GB/T 8059.3-1995 "Household Refrigeration Appliances Refrigerators", GB/T 8059.4-93 "Household Refrigeration Appliances Frostless Refrigerators, Frostless Refrigeration Refrigerators, Frostless Frozen Food Storage Boxes, and Frostless Food Refrigerators" GB 4343.1-2009 "Electromagnetic Compatibility - Requirements for Household Appliances, Electric Tools, and Similar Appliances - Part 1: Emission"