Smoke on the market, whether it is style, color, or model, function, people can not start, how can the machine to buy a satisfactory range hood it? Let's take a look at the range of range hoods currently on the market, so that you can grasp a certain amount of flaws.
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Now, the range hoods used in homes (also called suction/discharge/hood hoods) are collections of local smoke hoods, fans, and lighting (ie, integrated structures). Currently, the range hoods on the market are sold at home and abroad. A lot, but summed up according to the depth (or volume) of the hood, basically divided into three types:
Shallow cover type
The shallow hood type features a shallow or substantially non-hood hood, which includes a variety of flat, thin or ultra-thin type, and rectifying range hoods with fairings. Although the shallow hood type range hoods are small in size and smooth in shape, the hoods are too shallow or have no hoods, and it is difficult to quickly achieve the ideal effect of rapid extraction and removal of soot. Be eliminated.
2. Deep cover type
Deep-cover type includes deep-type or deep-type cabinets. These two types of range hoods have a deeper (larger volume) hood. When the fan rotates at a high speed, a certain negative pressure zone is formed above the hood. To absorb the soot that had no time to smoke, played a buffer role, thus avoiding a large number of soot spillover.
3. Cabinet type
Cabinet-type (also known as cabinet) range hoods are actually a combination of range hoods and fume cupboards, and the hood-type hoods are made up of four-sided screens (only one side is used as the operation port). In a larger collection hood, the fumes are enclosed and pumped. Therefore, it can more effectively prevent the spread of fumes from spillage. Compared with the deep hood type, the hood type can eliminate fumes with a small amount of air, a higher soot collection efficiency, and save energy.
For the above three types of range hoods, under the same technical conditions, the extraction rate of soot is about 40% for shallow hoods, 50-60% for deep hoods, and greater than 95% for hoods.
There is also a new type of hood that is called a curtain type. The biggest difference between the hood and the range hoods described above is that the hood exhausts only the fumes that pollute the indoor environment to the outdoors. To purify it, you can only "pump" and cannot "clean." The water curtain type net hood adopts a washing absorption method, utilizes an aqueous solution added with a detergent, and automatically emulsifies and saponifies the atomized aqueous solution and the oil mist at the same time when the oil fume is sucked and discharged, and the smoke dust is also wet and washed at the same time. The harmful gases generated during combustion and the oil smoke produced during cooking are mostly neutralized and purified by aqueous solutions. When the detergent contains more oil and the efficiency of the decontamination decreases, the automatic fume hood automatically alerts the user to change the detergent.
The working process of the curtain type hood is: collecting smoke - purifying - exhaust. It should be said that this type of range hood is currently the ideal environmental kitchen electrical equipment, but because of the difficulty of purification of soot, the need for special detergents, the structure is complex, high cost, the market price is not cheap, so it has not become pumping Hood mainstream products.
There are many factors to consider when choosing a range hood, such as safety, noise, air volume, main motor power, type, appearance, space occupation, ease of operation, price, and after-sales service. Generally speaking, the hoods certified by Great Wall have more reliable safety and quality assurance. Regarding noise, national standards stipulate that the noise of hoods does not exceed 65-68dB; on the air volume and fan power of range hoods, if It is only considered that the larger the fan power and air volume of the range hood, the better. Should be on the premise of achieving the same net extraction rate, the smaller the power and air volume of the fan, the better. This will not only save energy, but also achieve a better mute effect. In this sense, shallow hood types such as flat-plate type, ultra-thin type hoods with a low net extraction rate should not be purchased as much as possible.
Users should pay special attention to the following points when purchasing the product:
1. No matter how good the range hood (with the exception of the net range hood with oil fume purification function), no matter how its advertisement is introduced, it will not be contaminated with oil, and it will not be contaminated by oil fumes because there is no fume purification device or purification process. Many users now reflect that when the newly-purchased range hoods are just starting to work, the smoke-effect and noise of the range hoods are normal. After working for a period of time, the noise increases and the amount of exhaust air also decreases. This is mainly due to the condensation of the grease on the turbine fan blades of the range hood fan. Over time, the balance of the fan turbine blades is destroyed. As a result, the resistance and noise of the fan bearings are increased, and the life of the fan bearings is also affected. . Therefore, the cleaning of the hood is the most important part of the daily maintenance work after the user purchases. When the user purchases, special emphasis should be given to those models that can be easily dismantled by a lesbian without using any special tools. At the same time, it should also be observed that there should be no joints and hook grooves on the surface of the hood of the cooker hood in order to clean thoroughly and more conveniently.
2. In order to reduce the cost, some manufacturers change the turbine fan page of the fan into plastic. In the environment of the kitchen, the plastic turbine fan blade is easy to be aged and deformed, and it is not easy to clean. The user should purchase the metal turbine fan page as much as possible. Range hoods.
3. On smoke automatic detection function. Some range hoods are equipped with smoke detectors to achieve the automatic opening of the range hoods. Due to cost constraints, these simple smoke detectors cannot withstand the smoke of the kitchen and quickly fail, so the range hoods The soot detection function is inaudible and the user does not have much need to use the range hood with this function.
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