Every family now has a refrigerator, and some families have more than one. And as an ordinary household appliance, the refrigerator is used very frequently in the family. And now the refrigerator is not only used for food storage, more uses have been carried by the refrigerator. So, which brand of refrigerator is good, and how to choose a refrigerator?
Related content learned from experience
Classified by internal cooling
Cold air forced circulation type:
Also known as intercooled (air-cooled) or frost-free refrigerator. There is a small fan in the refrigerator to force the air flow in the box, so the temperature in the box is uniform, the cooling speed is fast, and the use is easy. However, due to the defrosting system, the power consumption is slightly larger, and the manufacturing is relatively complex.
Advantages: The box temperature is uniform, cooling speed is fast, easy to use, no frost.
Disadvantages: with defrosting system, slightly larger power consumption, relatively complex manufacturing.
Cool air natural convection:
Also known as direct-cooled or frosted refrigerator. The freezer is directly surrounded by the evaporator, or there is an evaporator in the freezer, and the upper part of the freezer is provided with an evaporator, which directly absorbs heat and cools down. This kind of refrigerator is relatively simple in structure, small in power consumption, but the temperature inefficiency is slightly poor, and the use is relatively inconvenient.
Advantages: This type of refrigerator has a relatively simple structure and low power consumption.
Disadvantages: temperature inefficiency is slightly poor, the use of relatively inconvenient, regular defrosting.
Combined cold air forced circulation and natural convection:
This form of refrigerator has been used more in recent years, mainly to take into account the advantages of wind and direct cooling ice boxes.
Advantages: Both performance and practicality, easy to use, good power consumption control.
Disadvantages: Complex structure, more expensive price.
Classification by shape
Single door refrigerator:
The refrigerator and the freezer are called single-door refrigerators in the box with only one door, which are mainly refrigerated and fresh-keeping, and have the advantages of simple structure, convenient use, less power consumption and lower price.
Advantages: cold storage and fresh-keeping, with simple structure, easy to use, less power consumption, low price advantages.
Disadvantages: The volume is generally smaller. Just make a separate small freezer inside the freezer that can only hold a small amount of stuff. Most of the space is used for refrigeration. Small volume, power saving, single function.
Two-door refrigerator:
The refrigerator and the freezer are separated, with two box doors, the small door is the freezer, the door is the freezer, the structure of the two-door refrigerator is more complicated than the single-door refrigerator, the material is more expensive.
Advantages: Low temperature, long shelf life of food, not easy to frost.
Disadvantages: The price is higher than the single door.
Refrigerator:
On the basis of the upper and lower two-door refrigerator, a fruit and vegetable room is added below, and after opening the door to the outside, it becomes a refrigerator. The refrigerator volume is relatively large, more than 200L, there are 3 different temperatures, suitable for freezing, refrigeration, fresh-keeping and fruit and vegetable storage.
Four-door refrigerator:
The four-door refrigerator is based on the refrigerator, and an independent, mild freezing room (also known as fresh-keeping room) with a temperature of 0~1℃ can store fresh fish is added between the cold room and the fruit and vegetable room. The four-door refrigerator has 4 temperature zones, which is suitable for freezing, refrigeration, fresh-keeping and fruit and vegetable storage.
Advantages: three, four door refrigerator volume is relatively large, more than 200L, there are 3 different temperature areas, suitable for freezing, refrigeration, fresh and fruit and vegetable storage.
Disadvantages: middle fruit and vegetable room, fresh-keeping room is small, the price is relatively high.
Folio refrigerator:
The double-door refrigerator is a large box with a vertical separator in the middle, and the door is installed on the left and right sides, and the cold room and the freezer are respectively on both sides. The new type of open door refrigerator adopts the design of open door + drawer type, which is more fashionable and personalized, and can meet the needs of better quality life.
Advantages: large capacity, more complete functions, the use of double refrigeration system double evaporator double fan (making the temperature of each room more accurate and reasonable).
Disadvantages: high price, non-ordinary working families can buy, power consumption is larger; And when it does need to be fixed one day, the cost will be terrifying.
Sort by placement
Vertical refrigerator:
In the height direction of the largest size, the door is located in front of the refrigerator, occupying a small area.
Horizontal refrigerator:
The size is the largest in the direction of length, and the door is mostly located at the top of the box. The freezer is usually horizontal, and the door is opened upward, which can reduce the leakage heat. However, the area is large and the access to goods is not convenient.
Horizontal refrigerator:
The size is the largest in the direction of length, and the door is mostly located at the top of the box. The freezer is usually horizontal, and the door is opened upward, which can reduce the leakage heat. However, the area is large and the access to goods is not convenient.
Classification by cooling air type
Gas compression refrigerator:
Relying on the low boiling point of liquid refrigerant (such as freon R12) when vaporized to achieve the purpose of refrigeration, and then with the compressor to evaporate and compress, and then make it exothermic liquefaction, so as to complete the refrigeration cycle of the refrigerator. Due to the theory and production technology of this refrigerator, the process is relatively mature, and the service life is long, so more than 90% of the refrigerators currently produced are such refrigerators.
Gas absorption refrigerator:
Powered by a heat source, ammonia is commonly used as a refrigerant, and hydrogen, which can cause liquid ammonia evaporation conditions, is used as a diffusion agent. A continuous "absorption-diffusion" refrigerator is completed by using a mixed solution of ammonia, water and hydrogen. Because there is no running machinery, it is noiseless, simple in structure, low in cost, not easy to damage, and long in service life. It can be heated by various heat sources such as electricity, natural gas, kerosene lamps and solar energy.
Semiconductor refrigerator:
The use of semiconductor materials to produce Perlgen effect for work, that is, P type semiconductor and N type semiconductor made of electric couple, after connecting the direct current, the phenomenon of heat release and heat absorption at the node, so as to achieve the purpose of cooling. Compared with mechanical refrigeration, semiconductor refrigeration has the characteristics of small size, light weight, no noise, no vibration, no wear, long life, convenient cooling rate adjustment, and no pollution. However, due to the high price, it is currently only used in small freezing equipment, such as car refrigerators, and other aspects have not been widely used.
Freezing capacity:
At present, the freezing capacity of refrigerators on the market varies greatly, from about 2.5 kg to 18 kg of freezing, and the best products have reached 22 kg.
Preservation performance:
There are three categories of computer temperature control, electronic temperature control and mechanical temperature control on the market. Computer temperature control refrigerator because of the use of advanced double temperature double control technology, can accurately determine the actual temperature in the box and send the information to the control center, the whole process to achieve fully computerized control, so as to truly ensure that the refrigerator always maintains a constant low temperature environment, can maintain the freshness and nutrition of food.
Computer temperature control - that is, accurate digital temperature control is represented.
The visual digital temperature display can be used outside the box to precisely control the temperature inside the box. Even if the refrigerator is frequently opened, it can be controlled by the computer system to change the working frequency of the compressor, so that the temperature is fixed at the set value, and the effect of saving electricity is achieved.
Mechanical temperature control
-- It refers to the refrigeration fixed by manual adjustment in a specified temperature range, does not have the function of automatically adjusting the temperature according to the storage situation of the refrigerator, the user needs to manually adjust the use of changes
Climate type:
The climate type of refrigerator is a sign of measuring the ability of refrigerator to adapt to seasonal changes and regional differences, which is directly related to the refrigeration performance of refrigerator in four seasons. Consumers are advised to choose a refrigerator with a wide climate zone design. When you buy, be sure to check the nameplate on the back of the refrigerator, only the refrigerator labeled "SN-ST (Subwarm-subtropical)" climate type is a true "wide climate design" refrigerator.
Low energy consumption:
Because the refrigerator model is different, the volume is also different, consumers are often unable to start when comparing. You can use the following formula to calculate the comparison: refrigerator per 100 liters of power consumption = daily power consumption/refrigerator net volume ×l00 (the smaller the value, the more power) Some homes refer to the advanced European Community energy consumption standards, to delineate the energy level of the product and in the refrigerator door affixed with the corresponding energy-saving label, of which grade A is the most energy-efficient product.
volume
It is recommended that the per capita volume of 60-70 litres is more appropriate. If there are special needs such as babies and children that require a larger capacity space, choose a large-volume refrigerator according to your needs.
Refrigeration mode
Refrigerator refrigeration methods have direct cooling (frost) and air-cooled (frost-free) two kinds, straight ice box fresh-keeping, moisturizing performance is good, the price is relatively cheap, but often defrosting, most suitable for use in the dry winter in the north and inland areas, frost-free refrigerator freezer automatic defrosting, the box temperature is more uniform, and the larger the volume, It has the advantages of uniform distribution of cold quantity and freezing effect, and is more suitable for the coastal, Yangtze River and south areas with large air humidity.
structure
The trend of modern refrigerators is developing in the direction of multi-temperature zones and multi-doors, in addition to the usual freezing and refrigeration intervals, there are ice temperature zones, cold zones and even variable temperature zones, which can not only improve the quality of food refrigeration, but also be convenient to use.
After-sales service
General refrigerators will have a certain repair rate, so it is necessary to choose products with good after-sales service.
Myth 1: Fluoride-free refrigerators are best
The corrosive effect of freon on the Earth's ozone layer has been confirmed by scientific research, but it is the best refrigerator blowing agent and refrigerant known to man so far. The refrigerator with freon (CFC-11) as foaming agent has uniform foaming, is not easy to deformation, has no corrosion to the inner plastic sheet, is time-efficient, and the insulation of the insulation layer does not change rapidly, and maintains power saving. Its adiabatic performance can effectively isolate the convection between the cold air inside the box and the hot air outside the box. Using freon (CFC-12) as refrigerant, large cooling capacity, non-toxic, non-flammable, good chemical and thermal stability, and good adaptability to metals, organic materials and lubricating oil in contact. At present, all the alternatives in the world, compared with freon, have such deficiencies
Misconception 2: The greater the freezing force, the better
Freezing power is an important technical index to measure refrigeration equipment. However, the use of refrigeration appliances is different, and the performance requirements are also differentiated. Compared with the special needs of commercial, medical and scientific research, the most important technical performance of household refrigerators is not refrigeration but preservation. Excessive freezing power not only unnecessarily increases the user's expenses, but also destroys the internal organization of food and affects nutrition. Especially for Chinese families that pay attention to color and flavor, preventing food deterioration is only the most basic need, and preservation is the first need for consumers to buy refrigerators.
Myth 3: The more power-efficient the refrigerator, the better
Like the freezing power, the power consumption of the refrigerator is also a very important performance indicator. However, in order to achieve the best preservation effect and the best energy efficiency ratio, it is far from enough to reduce electricity consumption, and there must be an optimal structure and refrigeration design. Enterprises can achieve the purpose of electricity saving through simple measures such as thickening the insulation layer (the cost has increased accordingly), and can also improve the energy efficiency ratio by using new technological achievements, so we can not unilaterally emphasize that "the more power saving the better."
Myth 4: The more features, the more advanced
Some enterprises in the function of "complex for", do not face what kind of consumers, regardless of whether consumers need, always design product functions more and more complex. The result is not only that users spend more money for a lot of impractical features, but more importantly, because of the cumbersome design that leads to frequent failures. In addition, from a technical point of view, due to the different functions, the required technology is also quite different: to have a considerable freezing force, the power must be matched, and the energy-saving silence has a certain limit; To be fluoride-free, you have to use alternatives, and some alternatives are easy to leak, and some corrosion of the inner liner, so the probability of failure is larger, the life of the refrigerator is also affected, a product can not be the best indicators, everything may not work.