As one of the three major components of traditional household appliances, refrigerators have enabled various ingredients to be preserved for a long time, bringing great convenience to life. With the development of science and technology, refrigerators have also gone from constant frequency to frequency conversion, from direct cooling to Air-cooled, from mechanical temperature control to computer temperature control and many other technological innovations.
Refrigerator brings more convenience to life
Refrigerator is an essential household electrical appliance in people's daily life. Its purchase problem also plagues many consumers. They go shopping in a circle, and various advertisements are overwhelming. The face of 'wind-cooling' 'inverter' The bactericidal, anti-bacterial 'dry-wet storage' and other cold technical vocabulary are really obscure and lost in the sea of opportunities.
In addition to the capacity to buy refrigerators should pay attention to the following six aspects
For the time being, let's put aside the subjective factors such as appearance and style, we should not only look at the size of the refrigerator, but also pay attention to the following aspects. This article will start with the refrigerator's technical indicators and preservation features, and bring you some Pure 'dry goods'!
● Refrigeration method
At present, the refrigeration of the refrigerator on the market is nothing more than three kinds: direct cooling, air cooling, mixed cooling.
Comparison of direct cooling and air cooling
Direct cooling can achieve the purpose of rapid cooling. However, the use of fixed-frequency compressors tends to cause a large temperature difference in the refrigerator and is prone to frost. In the long run, once a stubborn frost is formed, it will cause the user manual defrosting, and the temperature difference between the interior space. Larger and easier to make food deteriorating.
Air cooling improves the drawbacks of conventional direct cooling refrigerators. In general, an inverter compressor is used and the evaporator is set to the bottom. The cooling air is blown into each compartment of the refrigerator through a fan, so that the temperature inside the refrigerator is more uniform and the evaporator is heat exchanged. The main body, so it will not frost in the refrigerator room, eliminating the need for manual defrosting trouble, but the cold air blowing easily lead to food dried.
Mixing and cooling means mixing and cooling. Combining direct cooling and air cooling, in the cold room, the cooling room adopts the direct cooling method for cooling, and the freezing room adopts the air-cooled cooling method. This design can effectively solve the air-cooled refrigerator and easily dry the ingredients. , Direct cold fridge manual defrosting the two major pain points.
Direct cooling and air cooling have their advantages and disadvantages
Edit Comment: The use of a combination of direct cooling and air cooling in mixed cooling is a good way to make up for the shortcomings of the two cooling methods. In the cold room, the greenhouse is directly cooled because the basic temperature of these rooms is above 0°C. There is no icing or frosting conditions at all; the freezer is air-cooled. The ingredients here are basically long-term frozen, and there is no need to worry about air-drying. Therefore, the hybrid refrigerator is more practical than a single refrigerator.
Energy efficiency rating: Try to choose first-class energy efficiency products
●Energy efficiency grade
Careful friends will find that there is an energy rating mark in the upper right corner of the refrigerator, which directly reflects the energy consumption of the refrigerator. On October 1, 2016, the “Limited Value and Energy Efficiency Rating of Household Refrigerators” was formally adopted. Implemented, the newly revised energy efficiency standards for household refrigerators improve the evaluation, testing and calculation methods of energy efficiency of products, increase the standard power consumption of refrigerators, increase the load power consumption, and define and determine the overall power consumption, etc. The power consumption test value more in line with the actual use of the actual power consumption.
Energy efficiency logo on refrigerator door
The new standard still classifies energy efficiency grades from 1 to 5 from high to low. Among them, the first grade product is the most energy-efficient. The new standard has a larger increase in the energy efficiency rating, the energy efficiency index has increased significantly, and the new class 1 energy efficiency product consumes about the same amount of electricity. Level 1 energy efficiency consumption is reduced by 40%. The new level 1 energy efficiency standard is slightly better than the European refrigerator's most energy-saving grade A+++. Moreover, the new level 2 energy-saving rate is 12.5% higher than the original level 1.
The new energy efficiency rating is closer to the actual use of users
Edit Comment: To buy a refrigerator, be sure to look at the energy consumption level of the product. The author recommends that everyone try to buy a type 1 energy efficiency model. It is more energy efficient to use it everyday. After all, power saving is to save money. The price of a class 1 energy efficiency refrigerator It may be slightly more expensive, but 'buying expensive, using the province', we must know that refrigerators are different from other household electrical appliances, need to be plugged in and operated uninterruptedly throughout the year, and the additional electricity costs for high-energy-consuming products for a year will not be Small number.
Storage: Dry and wet storage for convenient storage of ingredients
● Dry and wet storage
Presumably everyone has this common sense about refrigerators: Different ingredients need to be categorized and stored in partitions. Although refrigerators today have a variety of shapes and sizes, regardless of their size, they generally have three zones: Refrigerator room, freezer room and changing greenhouse (two refrigerators and some side-by-side refrigerators may not be available).
Adjustable greenhouse temperature in the middle of the refrigerator
The temperature of the refrigerator compartment is generally 5°C; the temperature of the freezer compartment is -18°C or lower, and the lower temperature allows the foodstuff to have a longer shelf life; in the changing greenhouse, the user can adjust the temperature according to his own needs and turn it into refrigeration. Room or freezer to expand space, can also be set to a specific temperature to store special ingredients.
Different ingredients have different suitable storage humidity
In addition to the temperature, the moisture content of different ingredients is not the same, such as lettuce, apples, tomatoes and other fruits and vegetables are suitable for the place where the humidity is relatively high, and the fresh-keeping effect will be better; and for alfalfa, fungus, and ginseng , Bird's nest and other ingredients are suitable for storing in a relatively dry place, before they can be kept fresh for a long time. Is there any way to integrate these two types of ingredients that are 'incompatible with water'? Of course, this is 'dry and wet storage' refrigerator.
Dry and wet storage well solves the problem of storage of different types of ingredients
Edit Comment: Currently, many refrigerator products on the market are equipped with the characteristic 'dry-wet storage' technology, which uses sealed storage to completely separate fruits and vegetables from dry goods: Fruits and vegetables are kept in the 'high-humidity zone' and can be effectively maintained inside. Humidity, moisture is not lost to ensure that the ingredients are fresh and moist for a long time; dry goods are stored in the 'low humidity zone', internal drying does not return to moisture, nutrient loss is reduced, fresh ingredients are guaranteed, and both zones are kept fresh independently, resulting in many uses Convenient.
Sterilization and Purification: Protecting foodstuffs to protect health
● Sterilization effect
The large amount of ingredients in the refrigerator is piled up inside, and the confined space is prone to bacterial growth. Bacteria are the main culprit causing food spoilage. Therefore, a clean, fresh interior space will enable the food to be kept fresh for a longer period of time. More and more bacteria technology is used by refrigerators.
Clean, hygienic interior space will keep ingredients fresh for a long time
China's current GB 21551.4-2010 “Special requirements for refrigerators for antibacterial, sterilizing, and purifying functions of household and similar electrical appliances” has specific provisions for antibacterial and sterilizing refrigerators. The sterilization function of refrigerators is mainly through 'functional sterilization' and 'Bacterial antibacterial' two categories to achieve. Such as 'functional sterilization' including 'net ion', 'double ion', 'ABT dynamic sterilization', 'eddy current sterilization', 'light wave sterilization' and so on, different brands hit the main The concept of technology is also different.
Equipped with active sterilization technology Effective sterilization and protection of ingredients
Editor's comment: As far as the current trend is concerned, most of the refrigerators on the market are equipped with a sterilization function. The author proposes to buy a refrigerator equipped with sterilization technology as far as the price allows, it can create a refrigerator product. More fresh and clean internal storage space, bring better preservation effect, but also escort the family's health.
Circulatory system: Multi-cycle high-efficiency cooling does not confuse odor
●Circulation system
Taking an air-cooled refrigerator as an example, the internal circulation system of the products on the market is divided into single-cycle, double-cycle and three-cycle. The single-cycle, that is, there is only one evaporator in the interior of the refrigerator, which supplies air-conditioning for the entire interior space. Such a design leads to any A room cooling will cause the other room to be forced to cool, causing the temperature to be too low, freezing the food, and the room that needs to be refrigerated may be deteriorating because the cooling capacity is not long enough to reach the desired temperature.
Dual-cycle refrigerator
Two-cycle, two evaporators are built in the refrigerator. Two solenoid valves controlled by the room temperature controller determine the flow of the refrigerant, so that the independent cooling of the room can be achieved. The rooms do not interfere with each other and the temperature control is more accurate. The cooling speed is faster, and the odor interference is also greatly avoided. The three-cycle product is of a similar design. Each compartment is independently cooled, the cooling cycles do not interfere with each other, and the cooling effect is better.
Three-circle system refrigerator High-efficiency cooling without odor
Edit Comment: It is recommended that you buy a two-cycle or three-cycle model. This type of product has a faster cooling effect, better temperature control performance, and of course it also avoids the odor between different ingredients. However, if it is only simple The pursuit of cost-effective, you can choose a single-cycle cooling system models, its capacity is not, usually two or three, the price is about 1,000 yuan.
Temperature control performance: Precise temperature control food preservation better
● temperature control performance
The preservation effect of foodstuffs depends on three aspects of the refrigerator. In addition to the sterilization and purification functions just mentioned, the other two important aspects are the cooling speed and temperature control capability, especially the temperature control performance, for long-term storage in the refrigerator. In terms of ingredients, the smaller the fluctuation of the internal temperature difference, the more fresh the ingredients can last, the better the taste when eaten, and the less the nutrient loss.
The temperature fluctuation inside the refrigerator directly affects the preservation effect of ingredients
Edit Comment: For a refrigerator, the temperature control capability is very important, I recommend you try to buy refrigerator products equipped with inverter compressor, one more energy-efficient; second is to have a better temperature control effect, internal The temperature is more balanced and the food can be kept fresh longer.
Write last
Through this article, I believe we all understand the need to pay attention to the purchase of refrigerator indicators and parameters, the final summary of the full text, summed up one sentence: Buy a look like, capacity enough, the price is within the expected, a level of energy efficiency, equipped with wet and dry Sub-storage, sterilization purification of multi-cycle variable frequency mixed cold (or air-cooled) refrigerator products!