Hello, everyone, dehumidifier is a very small topic. Once we officially start, it is very difficult to take care of such a small topic. It happened that the return to the south had already begun, so we decided to do such an issue remotely and send it to our friends in the south. Share some of my personal research and understanding of the dehumidifier industry. Before buying a dehumidifier, our first question is where is the weather so wet that we need to buy a dehumidifier?
In addition to our impression that the central and southern coastal areas of Guangdong, Guangxi and Fujian are relatively humid, the humidity in Sichuan is also very high because it is a basin. Of course, the humidity here refers to the absolute humidity, that is, the water content in the air. The unit is grams per cubic meter. At a room temperature of 23 degrees, the air humidity is only 5% -10%. Very dry, even dry to static electricity, as we said in the humidifier bottle test, after a hand touch are afraid.Because of the low water content in the air, viruses and bacteria can easily float in the air and enter our nasal and oral mucosa, which is also the most easily transmitted humidity for respiratory diseases such as pneumonia and influenza.
As the humidity increases, viruses and bacteria begin to settle, and when the humidity reaches 50% -60%, they enter the most comfortable humidity area of the human body. Like Kunming, why is it like spring all the year round? Because not only is the temperature suitable, but also the humidity often falls in this range. When the humidity increases to 70%, the mold’s favorite humidity range is reached.Walls and clothing have a high chance of starting to mildew, and our intimate clothing will start to feel uncomfortable because of the increased friction caused by the increased amount of water. Even if the temperature is 23 degrees at this time, we will feel stuffy. For example, Wu Khan in summer will be called a stove. When the relative humidity reaches 100%, it reaches the upper limit that 23 degrees of air can hold. At this time, water will condense into water droplets, so the relative humidity.The percentage is like telling us the percentage of air water saturation at this time, and ah, as the temperature rises, the air can hold more water, the temperature goes from low to high, and the sea water capacity of the air is like a bottle getting bigger and bigger.
We have counted the average humidity of rain, month and year in some provincial capitals in the south, such as Chengdu and Guiyang, almost the same as Hainan and Guangzhou in the Pearl River Delta, and even more than 80% in many months. These cities need to do some dehumidification treatment. If we include the provincial capitals north of Qinling Mountains and Huaihe River, we will find that their relative humidity in winter can also reach more than 50%, which seems not very dry, right?But back to this array of bottles, the temperature is only five degrees, its bottle is very small, once the heating season, our room temperature will reach at least 18 degrees above, so when we pour the water in the air of five degrees and 50% relative humidity outside into a big bottle with a room temperature of 18 degrees, the relative humidity may be only 15%, which is very dry. So we need a humidifier to fill the bottle with 18 degrees to a comfortable humidity.Similarly, if we have just passed the New Year in the south, the temperature is often very low, and the air temperature at home is not high, if suddenly the warm and humid air from the south blows down the sea, 90% of the hot air meets the cold air on the floor and wall surface, just like pouring water from a big bottle that is almost full into a small bottle, once the relative humidity exceeds 100%. The walls and floors began to condense into drops of water and sweat.
This is the return to the blue sky that is very easy to happen in the south at this moment. Once we understand the phenomenon that the water capacity of air may be different at different temperatures, we can solve many misunderstandings in returning to Nantian. For example, the wall is not their own water, but because of the humid air outside the window.So the best way to go back to Nantian is not to ventilate and dry, but to close the doors and windows, to achieve relative sealing, or to turn on the air conditioner, to raise the indoor air temperature appropriately, so that the air can hold more water, and the ground and walls are not so easy to sweat. The need for dehumidification in our lives can be divided into two categories. One is the discomfort caused by high humidity, the mildew caused by the growth of mildew, and the return to the blue sky when the humidity exceeds 100%.We can use the way of dehumidification, there are two kinds, one is the desiccant that absorbs moisture, as long as it is used in a closed space, such as wardrobe, glass cabinet, close the door and replace it in time. The other is to change the temperature of the air, such as air conditioning and dehumidifier. These two kinds of electrical appliances are exactly the same in principle. They both use compressors to compress refrigerant to cool the air nearby and condense water into water droplets.So what’s the difference between the two? Don’t you need a dehumidifier if you have an air conditioner?
From a dehumidifier perspective, this is a very good question. First of all, domestic air conditioners are designed with the best operating humidity. Take the national standard as an example. Under the cold air conditions of the first and second levels, the relative humidity should not be higher than 70%. When we run air conditioners above 70%, the direct impact is power consumption.Our body’s temperature perception is not only related to temperature, but also to humidity. If the humidity is low in the north, it may only need 26 degrees to be comfortable in summer. In the south with high humidity, your air conditioner may still be very hot when it is adjusted to 26 degrees, that is, the sensible heat ratio. Take Guangdong as an example, in the night with higher humidity, we will reduce the air conditioning from 26 degrees to 25 degrees, and the power consumption will increase by about 50%.The second point, ah, is the primary and secondary energy efficiency often marked on the air conditioner. The higher the power consumption ratio of the air conditioning refrigeration system, the larger its air volume will be. In other words, the higher the efficiency of cold dissipation will be. The surface temperature of the cold dissipation sheet will not be as cold as that of low power consumption. The less cold it is, the worse its dehumidification ability of condensed water will be. Third, for many cities that are also wet and cold in winter, we use air conditioning to dehumidify.
In fact, the refrigeration experience is not good. If you blow warm air and raise the temperature, the room will be a little hot and humid, and if you want to dehumidify the whole house, you have to turn on the air conditioning in each room. On the contrary, the dehumidifier is relatively small and relatively easy to move. In fact, you can also dehumidify multiple rooms with one dehumidifier. This is the relationship between air conditioning and dehumidifier.Since the structure of dehumidifier is very similar to that of air conditioner, there are two parameters at the core of choosing dehumidifier.Dehumidification and quietness, I have gone through all the brands and products of humidifiers in Jingdong. In the process of purchasing, there are two details worth noting. The first is that there is no corresponding national standard for civil dehumidifiers in China. Businessmen prefer to exaggerate the amount of dehumidifiers. Basically, they all say eight liters, 12 liters and 20 liters per day. This figure actually has a lot of water, because China’s national standards and American standards, ah,They all use the relative humidity of 27 degrees and 60%. This is a relatively strict test method. The test under this temperature and humidity is called the public opinion test quantity. Many manufacturers use the test method of 30 degrees and 80% of the standard test quantity. This is equivalent to taking the initiative to reduce the difficulty for themselves and changing to a larger bottle. If the two are converted into the same standard, Public opinion dehumidification is often only half of the manufacturer’s standard dehumidification, which also reveals another principle.That is, the dehumidifier drops from high humidity to 60% very quickly, but when the relative humidity is 60% -50% or even lower, it will take a long time, so we estimate the small print of the product according to the capacity of the compressor.In the name of consulting customer service to supplement the number of accidents of each product, according to this figure, we have done several typical scenarios of accidents, we guarantee 50% ventilation, 27 degrees 80% high humidity, calculate the time required for each dehumidifier to reduce from 80% to comfortable humidity, how fast dehumidification, directly affect our actual experience. Just like we turn on the air conditioner, I don’t need to know how much you gather in a day.It’s where you can keep me cool when I need you.
First of all, the entry model is 8 liters to 12 liters, and their public opinion accident volume is mainly 0.To 0.29 kilograms per hour, the ideal time for a room of 10 square meters to reduce humidity from 80% to 60% is 30 minutes to 45 minutes. If a certain amount of ventilation is maintained, it will take about an hour, while the time for a room of 15 square meters is about one and a half hours to two hours. The diameter of their compressor is also within 44 centimeters. The price of eight to 12 liters of dehumidifier ranges from 498 to 1900 yuan.The main reason is that the premium of Japanese brands like Panasonic is relatively high, so the better model at this price is Germany.Home 599, this product is a good product after we talked with our peers in the industry. The cheaper model either has poor noise performance, or the water tank is too small. Although the English of the United States also makes air conditioning compressors, and their starting standard is higher than the national standard, but the cost performance is really not outstanding at this price.
And the second price is mainly 16 liters to 22 liters, row some very expensive models, the price is mainly from 800 to 1300 yuan, noise control is better than the millet side of the micro-lamp, although this is a new brand, but in fact it is a lot of foreign brand dehumidifier factories, that has networking function, noise control parameters? It is also better in this class.Another model is the 20-liter Deye, which basically has a water tank of more than three liters at this size, so it must be equipped with wheels to facilitate movement between multiple rooms. The nominal sales volume at this price is mainly from 0.38 to 0.5. According to the model calculation just now, 10 square meters can be controlled to a relatively reasonable humidity in about half an hour, while 15 square meters and 20 square meters need about one hour to one and a half hours respectively. We do not recommend dehumidifier flying.Use in a large space, because the flow capacity of water vapor in the air is relatively weak, to reduce the humidity of a large area, not only to put the dehumidifier in the middle of the house, but also a large one is better than dispersing into many small ones, multi-room households can buy a loud and familiar mobile according to the area of the living room. There is absolutely no need to pursue a higher storage capacity, such as more than 30 liters of products.In fact, the price is close to 2000 yuan, I looked at a lot of parameters and found that why don’t I buy an air conditioner at this price?
The main thing to choose and buy dehumidifier is to pay attention to these details. I see that the bad reviews and intermediate frequencies of many products mainly focus on the dissatisfaction with the noise. Indeed, the national standard requires that the data can fluctuate 3DB according to your actual noise, but it is not difficult to understand that many businesses subtract 3DB from the real noise. We have sorted out the core parameter table of the cooking machine and put it on the public account. We hope that we can enter the laboratory before returning to Nantian next year and give you a more accurate conclusion. All right, that’s all for this program. See you next time.
