As one of the three major pieces of traditional home appliances, the refrigerator has long-term preservation of various ingredients, bringing great convenience to life. With the development of technology, refrigerators have undergone a series of innovations from fixed frequency to frequency conversion, from direct cooling to air cooling, from mechanical temperature control to computer temperature control.
The refrigerator brings more convenience to life
As a must-have home appliance in people's daily life, the refrigerator also plagues many consumers. When they go shopping in the store, all kinds of overwhelming advertisements come face to face, facing “wind-cooled†and “frequency conversionâ€. When the technical vocabulary of cold ice, such as sterilization and bacteriostasis, "dry and wet storage", is really difficult to understand, it is lost in the sea of ​​opportunity.
In addition to the capacity to buy a refrigerator, you should pay attention to the following six aspects.
For the time being, we will leave aside the subjective factors such as appearance and style. The choice of refrigerators depends not only on the size of the refrigerator, but also on the following aspects. This article will start with the technical indicators and preservation functions of the refrigerator. Pure "dry goods"!
â—Refrigeration method
At present, there are three types of refrigerators on the market: direct cooling, air cooling, and mixed cooling.
Comparison of direct cooling and air cooling
Direct cooling can achieve the purpose of rapid cooling. However, due to the general use of fixed-frequency compressors, the temperature difference in the refrigerator is easy to cause large frost and easy to frost. In the long run, once the stubborn frost is formed, the user will be troubled by manual defrosting and the temperature difference in the internal space. Larger is also easy to deteriorate the ingredients.
Air cooling improves the drawbacks of traditional direct-cooling refrigerators. Generally, inverter compressors are used and the evaporator is placed at the bottom. The air is blown into the refrigerator compartments by the fan, so that the temperature inside the refrigerator is more uniform, and at the same time, the evaporator is heat exchanged. The main body, so it will not frost in the refrigerator room, eliminating the trouble of manual defrosting, but the cold wind will easily lead to the drying of the ingredients.
Mixed cooling or mixed cooling, combining direct cooling and air cooling, direct cooling in the cold room and variable greenhouse, and air-cooled cooling in the freezer. This design can effectively solve the air-cooled refrigerator and air-drying ingredients. The direct cooling of the refrigerator directly defrosting the two major use of pain points.
Direct and cold air have their own advantages and disadvantages
Edit Comment: The mixed cooling adopts the combination of direct cooling + air cooling, which makes up for the shortcomings of the two cooling methods. The cold room and the greenhouse are directly cold, because the basic temperature of these rooms is above 0 °C, there is no freezing and frosting conditions at all; the freezer is air-cooled, and the ingredients here basically belong to the need for long-term freezing, also There is no need to worry about air drying at all, so a hybrid refrigeration refrigerator is more practical than a single refrigeration refrigerator!
Energy efficiency rating: try to choose first-class energy efficiency products
â—Energy efficiency rating
Attentive friends will find that the energy efficiency rating is attached to the top 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 officially implemented. The newly revised energy efficiency standards for household refrigerators improved the evaluation, testing and calculation methods of energy efficiency of products, and increased the standard consumption of refrigerators. The definition and determination method of power consumption, load power consumption increment, and comprehensive power consumption make the test value of the power consumption of the refrigerator more in line with the actual use condition, that is, the actual power consumption.
Energy efficiency label on the refrigerator door
The new standard still divides the energy efficiency rating from high to low according to 1~5, and the first-level product is the most energy-efficient. The new standard has improved significantly in terms of energy efficiency rating, and the energy efficiency index has risen significantly. The power consumption of the new Class 1 energy efficiency product is about 40% lower than that of the original Class 1 energy efficiency. The new Class 1 energy efficiency standard is slightly better than the European refrigerator. A+++; Moreover, the new level 2 is 12.5% ​​more energy efficient than the original level 1.
The new energy efficiency rating is closer to the actual use of the user.
Editor's comment: It is necessary to look at the energy consumption level of the product when buying a refrigerator. I recommend that you try to purchase a class 1 energy-efficient model. The daily use is more energy-efficient. After all, saving electricity means saving money. The price of a Class 1 energy-efficient refrigerator may be slightly more expensive, but “buy expensive, use the provinceâ€, you must know that the refrigerator is different from other home appliances, you need to plug in the electricity all the year round, and the high-energy products run for one year. The electricity bill will also be no small amount.
Storage: dry and wet storage for easy storage of ingredients
â—dry and wet storage
Presumably everyone has the common sense of using such a refrigerator: different ingredients need to be classified and partitioned for storage. Although today's refrigerators vary in size and appearance, they generally have three temperature zones, whether they are large or small: refrigerators, freezers, and greenhouses (two-door refrigerators and some side-to-door refrigerators may not be available). ).
Variable greenhouse temperature in the middle of the refrigerator
The temperature of the refrigerator is generally 5 ° C; the temperature of the freezer is -18 ° C and below, the lower temperature allows the food to have a longer shelf life; the greenhouse, the user can adjust the temperature according to their own needs, turn it into refrigeration Room or freezer to expand the space, or set to a specific temperature to store special ingredients.
Different ingredients have different suitable storage humidity
In addition to temperature, different foods are suitable for storing different humidity. For example, lettuce, apple, tomato and other fruits and vegetables are suitable for high humidity, and the preservation effect is better; for cockroaches, fungus, ginseng Ingredients such as bird's nest are suitable for storage in relatively dry places for long-term preservation. Is there a way to combine these two kinds of "water and fire" ingredients in a unified way? Of course, this is the "dry and wet storage" refrigerator.
Dry and wet storage is a good solution to the problem of storage of different types of ingredients.
Editor's comment: At present, many refrigerator products on the market are equipped with the characteristic “dry and wet storage†technology. The sealed storage method is used to completely separate fruits and vegetables from dry goods: fruits and vegetables are placed in “high humidity areaâ€, and the interior can be effectively maintained. Humidity, lock the moisture without loss, ensure that the ingredients are fresh and hydrated for a long time; dry goods are stored in the “low-humidity zoneâ€, the internal drying does not return to the tide, reducing the loss of nutrients, ensuring the fresh taste of the ingredients, and the two districts are independent and fresh, which brings a lot of use. Convenient.
Sterilization and purification: care for food and effectively protect health
â— sterilization effect
A large amount of food is piled up inside the refrigerator, and bacteria are easily occluded in a confined space, and bacteria are the main culprit in causing spoilage of the ingredients. Therefore, a clean, fresh interior space will allow the ingredients to be preserved for a longer period of time, so more and more purification and sterilization techniques are adopted by the refrigerator.
Clean and hygienic interior space will keep the ingredients fresh for a long time
China's current GB 21551.4-2010 "Special requirements for antibacterial, sterilizing and purifying refrigerators for household and similar electrical appliances" have clear provisions for antibacterial and bactericidal refrigerators. The sterilization function of refrigerators mainly passes "functional sterilization" and "Material inhibition" is achieved in two major categories. For example, "functional sterilization" includes "net ion", "double ion", "ABT dynamic sterilization", "eddy current sterilization", "light wave sterilization", etc., and the technical concepts of different brands are different.
Equipped with active sterilization technology, effective sterilization and care 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 suggests to buy a refrigerator product equipped with sterilization technology within the price range, which can create a refrigerator. The fresher and cleaner internal storage space will bring better preservation effect and also protect the health of the family.
Circulatory system: multi-cycle high-efficiency refrigeration without odor
â—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. Single cycle, that is, there is only one evaporator inside the refrigerator to deliver cold air to the entire internal space. This design causes any compartment to be cooled, which will force another compartment to cool down, resulting in low temperature and frostbite. However, the compartment requiring cooling may not reach the ideal temperature due to insufficient cooling. The ingredients are spoiled.
Equipped with dual cycle system refrigerator
Double cycle, the refrigerator has two evaporators. The two solenoid valves controlled by the room temperature controller determine the flow direction of the refrigerant, so that the compartments can be independently cooled, the chambers do not interfere with each other, and the temperature control is more precise. The cooling rate is faster, and the odor interference is also largely avoided. The three-cycle product has a similar design, and each compartment is independently cooled, and the air-conditioning cycle does not interfere with each other, and the refrigeration effect is better.
Three-cycle system refrigerator efficient cooling does not taste
Editor's comment: It is recommended that you buy a double-cycle or three-cycle model. These products have a faster cooling effect, better temperature control performance, and of course avoid the odor between different ingredients. However, if you are simply pursuing economic cost-effectiveness, you can choose a single-cycle refrigeration system model, which has a small capacity, usually two or three doors, and the price is around 1,000 yuan.
Temperature control performance: precise temperature control, better preservation of ingredients
â— Temperature control performance
The preservation effect of the ingredients depends on the 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 ability, especially the temperature control performance, for long time storage in the refrigerator. In terms of ingredients, the smaller the internal temperature difference fluctuates, the more fresh the ingredients can be, and the better the taste will be, the less nutrient loss will be.
The temperature fluctuation inside the refrigerator directly affects the fresh-keeping effect of the ingredients.
Edit Comment: For a refrigerator, the temperature control ability is very important, I recommend everyone to buy refrigerator products equipped with inverter compressors, one is more energy-efficient; the second is to have better temperature control effect, internal The temperature is more balanced and the ingredients can be kept fresh longer.
Written at the end
Through this article, I believe that everyone knows the indicators and parameters that need to be paid attention to when purchasing a refrigerator. Finally, the paper summarizes the full text and summarizes one sentence: buy one looks like, the capacity is enough, the price is within the expectation, the level 1 energy efficiency, equipped with wet and dry Multi-cycle variable frequency mixed cold (or air-cooled) refrigerator products for storage, sterilization and purification!
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