How to choose refrigerator and freezer products? According to the Municipal Market Supervision Bureau, refrigerators and freezers are all national compulsory product certification products. Please look for the CCC mark. The energy efficiency grade indicates the product's energy utilization efficiency . The higher the energy efficiency grade, the higher the product's energy efficiency utilization rate, which is relatively more power-saving. In addition, attention should be paid to three parameters: total volume, comprehensive power consumption and frozen storage temperature. For more information, see ↓
Most common refrigerators on the market are compressor refrigeration refrigerators, and semiconductor refrigeration refrigerators are mostly refrigerators with an internal temperature above 0°C, ice bars, , etc.
According to the different heat exchange methods of the evaporator, compressor refrigeration refrigerators are divided into: direct cooling refrigerators, air-cooled refrigerators, and mixed cooling refrigerators.
adopts the natural convection heat exchange mode between the chamber and the evaporator, which can maintain high air humidity and prevent food moisture from being lost easily.
The cooling capacity of the refrigerator is unevenly distributed, and there may be dead spots where the freezing temperature is uneven.
requires periodic manual defrosting.
uses a fan to force the evaporator cold air to circulate in the box, also called frost-free refrigerator .
uses forced convection heat exchange, which can easily cause water loss in the fruits and vegetables in the refrigerator compartment.
eliminates the need for regular manual defrosting.
uses a combination of direct cooling and air cooling for cooling. The
refrigerator adopts a direct cooling method to avoid water loss in fruits and vegetables and better ensure the freshness of the ingredients. The freezer adopts air-cooling and frost-free refrigeration mode to solve the problem of freezing in the freezer.
Note: It is generally believed that high humidity in the refrigerator is beneficial to the preservation of fruits and vegetables.
According to differences in spatial structure, the freezers currently on the market are divided into vertical freezers and horizontal freezers.
lacks internal layers, which can easily lead to cluttered storage and inconvenient access to food.
A horizontal freezer with the same volume occupies a larger area, and the top cannot be used as a storage space, so it is not suitable for small families.
horizontal freezers are mainly divided into two categories: single-temperature cabinets and double-temperature cabinets:
occupies a relatively small area, and uses side door openings, making its space utilization more reasonable. The internal space of
is reasonably layered, making it easier for consumers to store and access by category. The price is higher than similar horizontal freezers.
Judging from the latest product supervision and spot inspections, in 2021, the Shanghai Municipal Administration for Market Regulation conducted supervision and spot inspections of refrigerator products in the city’s production and circulation fields. After inspection, 2 batches of products were found to be unqualified.
Judging from the results of the city’s follow-up supervision and random inspections of refrigerator products in the past three years, unqualified items are concentrated in the protection of contact with live parts, storage temperature, freezing capacity, total volume, and some items related to performance and energy efficiency.
In recent years, this city has not carried out product supervision and spot checks on freezer products. Judging from the results of supervision and spot inspections by the State Administration for Market Regulation and other provinces and cities, unqualified projects are mainly concentrated in grounding measures, energy efficiency levels and other items.
Unqualified products lack effective protection for the openings at the bottom and sides of the compressor box in the design, resulting in the Type B test finger (simulating consumer fingers) and No. 13 test probe (simulating common tools such as screwdrivers) to directly touch the internal wires and live parts, which may present a safety risk of electric shock.
This project simulates the impact of the maximum amount of fresh food that can be placed in the freezer on the temperature of the original frozen food and the time required for the newly placed food to cool down to -18°C.
Failure in this project may cause the taste of stored food to deteriorate, shorten the storage cycle, and affect the quality of frozen food.
This item is an important indicator related to the great cause of "tuncai" for consumers. The refrigerator model is usually related to the total volume, and the explicit parameters of the total volume and the volume of each compartment have important reference value for purchase, such as product virtualization. Marking "unqualified" will directly affect consumers' purchasing judgment and daily use experience.
Consumers should choose refrigerators and freezers based on actual needs, and can focus on the following matters:
Refrigerator and freezer products are national compulsory product certification products, please look for the CCC mark.
Generally speaking, the detailed dimensions of refrigerators and freezers will be indicated on the product details page. Before purchasing, be sure to reserve a space and consider the heat dissipation distance of about 10cm around the refrigerator.
The energy efficiency level indicates the energy efficiency of the product. The higher the energy efficiency level, the higher the energy efficiency of the product and it is relatively more power-saving.
Consumers can scan the QR code on the energy efficiency label to check the registration parameters and other information of refrigerators and freezers.
focuses on three parameters: total volume, comprehensive power consumption and frozen storage temperature.
The total volume can usually be calculated based on 60L per person. Generally, 200L can meet the daily needs of a family of three. The smaller the overall power consumption value of
is, the less power the refrigerator consumes under laboratory conditions.
In terms of freezing storage temperature, currently most refrigerators and freezers are rated "***", that is, the minimum temperature must reach -18°C. For some products that can reach "****" or are advertised as being able to reach the deep-freezing temperature zone, in In the absence of authoritative test reports and data sources, consumers should conduct rational screening.
There are many concepts on the market such as "0℃ preservation, vacuum preservation, humidification preservation, and precise temperature control preservation". In theory, it can play a certain role in delaying spoilage of different foods, but there is currently no unified national standard method. Therefore, it is recommended that consumers choose rationally based on the varieties and habits of stocking vegetables.
Editor: Zhang Tianyi
Information: Shanghai released
