Household refrigerator market

The whole world history points to general laws of development of household refrigerating appliances from the simplest small models with manual defrosting of the evaporator to capacious and comfortable ones with automatic defrosting. From one-compartment to two-compartment models. From small compartments for storing frozen foods (less than 10% of the total volume) to solid freezers (over 40% of the total volume, where you can freeze dozens of kilograms of products and keep them in emergency situations for up to 3 days). From an expensive prestigious fridge confirming the family's welfare to a widely available mass item of prime necessity. The general trends are saving energy consumption and reducing the cost per dm³ of useful volume, as well as increasing the convenience of operation.