When buying a microwave oven , everyone is thinking about what brand of microwave oven is good , which microwave oven is of good quality, etc. In fact, to buy a microwave oven, you need to know what style and performance are really suitable for you. If you buy a style and performance that is not suitable for you, you will regret why you did not buy that style. The principle of microwave heating is simply: when microwave is radiated to food, the food always contains a certain amount of water, and water is composed of polar molecules (the positive and negative charge centers of molecules, even when the external electric field does not exist) Consistent), the orientation of this polar molecule will change with the microwave field. Because of this movement of polar molecules of water in food. As well as the interaction between adjacent molecules, a friction-like phenomenon is generated, which raises the temperature of the water and therefore the temperature of the food. The food heated by microwaves is heated at the same time, so that the whole object is heated evenly, and the temperature rises quickly. It heats at a depth of 5cm into food at a rate of 2.45 billion times per second to accelerate the movement of molecules. From the point of view of control Computer microwave Suitable for young people and people with higher education level. The advantage is that it can accurately control the heating time. Depending on the food being heated, there are a variety of programs to choose from. High-end products may have some other additional functions. The disadvantage is that there are many buttons and the operation is complicated and difficult to master. Mechanical microwave oven Most suitable for middle-aged and elderly people. The advantage is that the operation is simple, clear, and the product has good reliability and is suitable for the elderly. From the functional point of view There are two types of barbecue and no barbecue. People who like to eat barbecue may wish to buy a barbecue-type microwave oven. Frequency conversion microwave oven Unlike traditional microwave ovens, which are easy to heat unevenly, the frequency conversion microwave oven uses automatic adjustment and continuous output of microwave energy, which can meet the requirements of different foods for different firepower, and truly realize automatic regulation from strong fire to weak fire. It not only ensures the taste and color of the food, but also fully retains the nutrients of the food. And when cooking for a long time with low power, the surface or edge of the food will not burn. In terms of cooking speed, the frequency conversion steamed cubic microwave oven uses a frequency converter to replace the high-voltage transformer and high-voltage capacitor, etc., which reduces the loss of the power conversion part, improves the thermal efficiency by more than 5%, and increases the effective power by nearly 10%. Under the same conditions, the cooking time is reduced by 10%. In terms of energy saving, the energy efficiency is as high as about 64%, which is 62% higher than the national first-level energy consumption standard. How to buy a microwave oven Basic requirements for purchasing a microwave oven 1. Microwave ovens are listed in the first batch of national compulsory safety certification (CCC certification) catalogs. Consumers must choose products with the "CCC" certification mark and the corresponding factory code and certification certificate number when purchasing. . In order to verify the authenticity of the certification mark and certification certificate, you can log on the official website of the China National Certification and Accreditation Administration Commission for online query of the certification certificate. 2. Check whether the product manual, certificate, warranty card and accessories are complete. 3. Check the product logo and instruction manual carefully. The national compulsory standard GB4706.21-2002 "Special Requirements for Safe Microwave Ovens for Household and Similar Uses" stipulates that the logo of microwave oven products should be clear and standardized, and the content should include: trademark, model, specifications (such as capacity), rated voltage, Rated input power, the symbol of the nature of the power supply, the name of the manufacturer, the rated output power, etc .; the manual should have warnings to prevent misuse and detailed cleaning methods, etc .; the operation switch logo on the product should be clear and reliable and fixed. 4. Choose well-known enterprises with larger scale, better product quality and better service quality. Due to the stricter quality control of raw materials, components and products, the advanced production equipment, the high level of enterprise management, and the guarantee of product quality and after-sales service. 5. Add water and test burn. You can use a glass to add proper amount of water to power on and test burn. After the microwave oven is powered on, the water in the oven will heat up. The shorter the heating time and the higher the water temperature, the better the heating performance of the microwave oven. At the same time, after the microwave oven is operated for a period of time, touching the appliance shell is hot. If the appliance shell is hot, it means that the appliance has poor heat dissipation conditions. 6. Check the appearance. The appearance should be flat and smooth, with uniform color and no obvious color difference. In addition, microwave ovens will generate microwaves. Pay special attention to the sealing of the door and whether the door interlocking device is normal. What, the decoration still uses his own money? ! The Qi family is decorated in installments, with an ultra-low annual interest rate of 3.55% and a maximum loan of 1 million. 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