Climate type: south subtropical type 10℃-32℃
North temperate type 16℃-32℃
ST- subtropical type 18℃-38℃
T- tropical type 18℃-43℃
-Most products in China are st and N models.
Model name: BC—(/ W) stands for refrigerator.
BD-(/w) stands for freezer.
BCD？ (/W) stands for refrigerated freezer.
B stands for household refrigerator.
、? /indicates the effective volume.
W/ stands for air-cooled refrigerator.
-Energy-saving certification mark
1998 10, China established China energy-saving product certification center (CECP), which has a series of standards to determine whether a product belongs to energy-saving products. Its certification scope is energy-saving, water-saving and environmental protection products. After the establishment of the center, after a period of preparation, from April of 1999, starting from household refrigerators, the energy-saving certification was officially carried out. At present, CECP has accepted the energy-saving product certification of household refrigerators, microwave ovens, electric water heaters, rice cookers, faucets, toilets, televisions, energy-saving appliances and so on 18, and will further carry out the energy-saving and water-saving certification of washing machines in the future.
Certification mark? 0? At present, there are two kinds of labels in China market to help consumers choose. One is the China energy-saving certification label recognized and published by CECP, and the other is the European energy efficiency grade label. These different standards also reflect the development process of energy-saving products in China: with the progress of science and technology, the level of energy saving has been continuously improved, which has also led to the upgrading of standards.
A, China energy-saving certification mark has the word "Jie" in blue, indicating that the product has passed the China energy-saving certification. This certification was just started in 1999. After several years of hard work, most household appliances can achieve this goal at present.
B. European energy efficiency rating label The energy efficiency rating of home appliances in the European Union ranges from A to G * * *, with a total of 7 grades. There are two grades of energy labels for refrigerators and freezers: A+ and A++, and A+ for household washing machines. The newly introduced A+ class power consumption will save more than 58% compared with similar products, and the a++ class power consumption will save more than 70% compared with similar products.
Because the original energy-saving label in China only distinguishes between energy-saving and non-energy-saving, it does not divide the energy-saving performance of products in detail, and the new energy-saving label has not yet been issued, some enterprises have borrowed the European energy-saving grade label.
-The meaning of the star symbol on the refrigerator
Indicates the storage temperature level of the frozen part of the refrigerator. It is a symbol of the indoor temperature of refrigerator uniformly adopted by national standards.
Each star indicates that the storage temperature in the freezer should be below -6℃ and the storage time of frozen food should be 1 week.
For example:
A three-star refrigerator means that the storage temperature of the freezer should be below-18℃, and it has the ability to quickly freeze a certain amount of food. Simply put, the freezing capacity refers to a certain amount of lean beef at 25℃, which is frozen below-18℃ for 24 hours.
Structure and working principle of household refrigerator
Take a single-door refrigerator as an example, let's first understand its main and auxiliary structure and working principle. The refrigerator consists of a box, a refrigeration system and a control system. In the refrigeration system, it is mainly composed of compressor, condenser, evaporator and capillary throttle, forming a closed circulation system. Wherein the evaporator is installed above the interior of the refrigerator, and other components are installed on the back of the refrigerator. The system is full of refrigerant. The refrigerant evaporates from low-pressure liquid into gas in the evaporator, which absorbs the heat in the refrigerator and reduces the temperature in the refrigerator. The gaseous refrigerant is sucked by the compressor, compressed into high temperature and high pressure gas by the compressor, and then discharged into the condenser. In the condenser, the refrigerant continuously releases heat to the surrounding space and gradually condenses into liquid. These high-pressure liquids must flow through the capillary, and then slowly flow into the evaporator through throttling and depressurization, and remain in the evaporator to continuously vaporize, absorb heat and cool down. In this way, the refrigerator uses electric energy to do work, and with the help of the change of refrigerant state, the heat around the evaporator in the box is moved to the condenser behind the box for release, so that it is continuously circulated to realize refrigeration.
-Fluorine-free refrigerant
R 12 refrigerant is commonly used in the refrigeration system of ordinary refrigerators. When it leaks into the air and is exposed to the sun, a chemical reaction will occur. It leads to the reduction of ozone, the destruction of atmospheric environment, the disappearance of ozone layer and the formation of holes, which poses a great threat to human health and normal biological growth. With the release of national regulations on Freon refrigerants, all products using Freon refrigerants in 20 10 are not allowed to be sold. So now many manufacturers are gradually transforming and launching fluorine-free refrigerators. Most of these refrigerators use R 134a refrigerant or R600a refrigerant instead of R 12 refrigerant, and the main components, sealing materials and lubricating oil of refrigerators are different from ordinary refrigerators. R600 refrigerant is the best refrigerant at present, and all fluorine-free refrigerators in Europe use R600 refrigerant. R600 refrigerant has low energy consumption, which can effectively reduce the damage of refrigerant to the compressor, without destroying the atmospheric odor layer and greenhouse effect. Compared with R 134, R40 1 and other refrigerants, it has high refrigeration efficiency, noise reduction of 2-4 decibels and energy saving, so it is the most ideal refrigerant at present.
-What is a fluorine-free "double green" refrigerator?
Fluorine-free "double-green" refrigerator means that chlorofluorocarbons (CFCs) are no longer used as refrigerants and box insulation foam materials, but substitutes are used separately, which will no longer pollute the environment. According to international practice, this kind of refrigerator can be called "double green", that is, 100% reduces the freon content, and it is a new refrigerator that completely meets the international environmental protection requirements.
R R-12 (Freon) is a commonly used refrigerant in the refrigeration system of ordinary refrigerators. When it leaks into the air, it will be irradiated by ultraviolet rays of the sun, which will easily lead to chemical reactions, destroy the ozone layer, reduce the amount of ozone, and even lead to the disappearance of the ozone layer, forming a cavity, posing a threat to human health and the normal growth and reproduction of organisms.
In order to protect the atmospheric environment on which human beings depend, many manufacturers have successively introduced fluorine-free refrigerators, and most of them use R- 134a and R-600a as refrigerants.
Direct cooling and air cooling refrigerator
Direct-cooling refrigerator uses the natural convection of air in the refrigerator to cool food. Because the evaporator is often installed in the upper part of the refrigerator, the air around the evaporator exchanges heat with the evaporator, the air transfers heat to the evaporator, and the evaporator transfers cold to the air. After air absorbs cold energy, its temperature drops, its density increases and it moves downward. The air in the lower part of the refrigerator exchanges heat with the cooled food, and the food transfers heat to the air. After the air gets heat, the temperature rises and the density decreases, and then it rises around the evaporator to transfer the heat to the evaporator. In this way, cold and hot air repeatedly convects naturally to achieve the purpose of refrigeration.
The evaporator of air-cooled refrigerator is usually finned tube type, which is placed in the interlayer of freezing room and refrigerating room or in the rear upper part of the box. Use a small fan to force air convection in the box to achieve the purpose of cooling. The vast majority of refrigerators produced in China are direct-cooled refrigerators, and the output of air-cooled refrigerators is relatively small.
-Fresh refrigerator
According to scientific analysis, microbial corruption and enzyme decomposition are the chief culprits of food corruption. From 2℃ to 6℃, the activities of microorganisms and enzymes are greatly reduced, which can keep food fresh and fully retain nutrition. At-18℃, the activities of microorganisms and enzymes basically stopped.
Where is the fresh-keeping refrigerator?
The traditional refrigerator has only two temperature zones: the freezing zone covers the temperature range from-10℃ to -28℃ to meet the strong freezing demand; In the cold storage area, the temperature range is between 2℃- 10℃, which meets the needs of instant storage. Due to technical limitations, there has always been a gap between 2℃ and 10℃, but this temperature zone is just a more suitable fresh-keeping area for many meats, fruits and vegetables. The soft-cooled refrigerator at -7℃ is dedicated to the preservation of meat; 0℃ fresh-keeping refrigerator pays more attention to the preservation of fruits and vegetables.
-Energy-saving refrigerator
Frequency conversion technology: Through the sensor and electronic intelligent control system, the rotating speed of the compressor can be changed according to the needs of the refrigerating room or freezing room of the refrigerator to meet its refrigeration capacity. Because frequency conversion technology can best distribute the cooling capacity, its refrigeration cycle can be kept in the most energy-saving state, which is about 20% more energy-saving than ordinary refrigerators.
Multi-cycle refrigeration system: through electromagnetic valve and electronic temperature control system, the cold energy is sent to the most needed room. So as to realize accurate temperature control, effectively control indoor temperature fluctuation, and achieve the purpose of better preserving and saving energy of food in the refrigerator.
Energy-saving compressor: compressor manufacturers improve the overall efficiency by improving the mechanical and electrical efficiency, improving the cooling in the compressor and reducing the clearance volume of the piston.
Intelligent defrosting of frost-free refrigerator: Through the sensor and control system, the refrigerator can automatically adjust the defrosting cycle of frost-free refrigerator according to the door opening frequency, so as to achieve the goal of no ice plug in the refrigerator, which can effectively save energy by about 4%.
Vacuum insulation technology: Vacuum insulation technology has the greatest energy-saving potential, which can reach the energy-saving goal of about 30% under ideal conditions. However, the current development of this technology is affected by the high material cost and the difficulty of process quality control.
At present, the development of new energy-saving refrigerator technology is one of the main focuses of competition among major refrigerator manufacturers.
-Nanotechnology refrigerator
Nanometer is only a unit of measurement, and the connotation of nanoscience is to understand the world on the nanometer scale. The key is that materials should have sudden changes in performance. At present, some enterprises arbitrarily use the name of nano to carry out commercial speculation, exaggerating the role of nano, which has caused adverse effects in society and hurt nanotechnology itself.
For example, the "nano-cup" is no different from ordinary cups in appearance. It is probably just a small piece of ceramic products made of nano-materials, so it is called "nano-cup". In fact, the criterion for judging whether to use nanotechnology is whether consumers really feel different from ordinary cups and are really good for their health. If you can't tell why it has "magical effect", it's no use labeling the cup with 100 nm.
The so-called "nano refrigerator" is only the application of nanotechnology in some sterilization materials, but it cannot be proved whether nanotechnology can be used more for sterilization.
-Freezer, freezer
The freezer is mainly used for food freezing and low-temperature storage, and the temperature in the freezer is generally below-18℃. There are two kinds of vertical and horizontal, and the internal volume varies from 130- 1000 L.
Refrigerator is a kind of refrigeration equipment with small refrigeration device, which can also be called display cabinet, and is specially used to store fruits, vegetables and drinks. Mainly divided into vertical and horizontal, including single door, double door and four doors. ? 0? 2