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什么是纯物理空气净化器？

What is a pure physical air purifier?

首先代表化学方向的毕业生们声明，所谓“纯物理”三个字是典型的，助长社会不良风气的学科歧视。所谓非纯物理的空净，用的也还是物理技术。

First of all, graduates who represent chemical directions declare that the three words of "pure physics" are typical discriminatory disciplines that encourage unhealthy social practices. The so-called pure physics is also physical technology.

好吧，俗称纯物理过滤的空净，指的是只用HEPA、活性炭等滤网过滤，清除空气中的PM2.5，甲醛等污染物。

OK, commonly known as pure physical filtration empty net, refers to only HEPA, activated carbon filter screen, remove air PM2.5, formaldehyde and other pollutants.

而相对非纯物理空净，指的是没有使用滤网，或者在滤网之外使用其他技术，比如最近流行的高压静电集尘技术，此外当然还有日系厂家可能会编造出的各种奇葩名字的技术，如X离子，X因子，XX能等等。

The relative non pure physical emptiness refers to the absence of filters, or the use of other technologies outside the filter, such as the recently popular high voltage electrostatic dust technology, and, of course, the technology that the Japanese manufacturers may create a variety of exotic flowers, such as X ions, X factors, XX energy and so on.

即便是日系净化器中相对靠谱的夏普也患有X离子脑残综合征。

Even the relatively reliable SHARP in the Japanese purifier suffers from X ion brain wasting syndrome.

静电等技术

Electrostatic and other technologies

使用这些技术的主要目的是为了用静电吸附的原理加强颗粒物过滤的效果，或者用负离子/臭氧，或静电等技术杀菌、除味，去除有机污染物等等。

The main purpose of the use of these techniques is to enhance the effect of particulate filtration with the principle of electrostatic adsorption, or to use negative ion / ozone, or electrostatic technology to sterilize, remove odor, remove organic pollutants and so on.

既然静电吸附技术这么好用，为什么大家不都像什么贝昂、远大一样，搞无耗材纯静电过滤器呢？原因很简单，高压静电类的技术，必然会产生一种比PM2.5还烦人的空气污染物：臭氧。

Since electrostatic adsorption technology is so easy to use, why don't we all be like what we can do with a big electrostatic filter? The reason is very simple, high voltage electrostatic technology, will inevitably produce a more annoying air pollutants than PM2.5: ozone.

和当红的雾霾相比，臭氧危害会被很多人忽视。臭氧是一种强氧化剂，虽然在大气层上面飘着的臭氧层可以帮我们抵御紫外线的伤害。但地面的臭氧污染则会造成我们哮喘、支气管炎、心脏病等心肺疾病，甚至危害生命。

Compared with the red haze, the harm of ozone will be overlooked by many people. Ozone is a strong oxidant, although the ozone layer floating on the atmosphere can protect us against ultraviolet rays. However, ozone pollution on the ground can cause heart and lung diseases such as asthma, bronchitis, heart disease, and even endanger life.

高压静电技术一定会产生臭氧，只是多少的问题。国家对于电器产生臭氧的浓度有要求，所以一般情况下，这些厂家会在机器中加一层还原层，用来还原机器生成的臭氧，以达到国标，通过检测。

High voltage electrostatic technology will produce ozone, which is just a matter of how many problems. The state has a requirement for the concentration of ozone for electrical appliances, so in general, these manufacturers will add a layer of reduction to the machine to reduce the ozone generated by the machine in order to reach the national standard and pass the test.

贝昂这类高压静电产品据说可以省耗材，但CADR非常低，价格也往往卖得比换十年的滤网还贵。

Such a high voltage electrostatic product is said to be able to save materials, but CADR is very low, and the price is often more expensive than the filter that has changed for ten years.

满足国标，仍然无法让我们减弱对这个技术的反感。因为世界上不存在永远不会出问题，不会损坏的电器。没有厂家可以保障出厂合格率是绝对的100%，也更不可能保证用户使用1个月，1年，2年，5年之后，绝对没有故障，绝对不会出现臭氧超标的问题。

To satisfy the national standard, we still can not weaken our antipathy towards this technology. Because there are no electrical appliances that will never be damaged and will not be damaged in the world. No factory can guarantee the factory qualification rate is absolute 100%, or more impossible to ensure that users use 1 months, 1 years, 2 years, 5 years, absolutely no fault, absolutely no ozone over the standard problem.

一般的纯物理净化器，出了问题无非是噪音大点，工作效率低点......但使用静电等技术的产品，就会有造成臭氧超标的风险。那些厂家敢保证10年之后，没有一台机器臭氧超标么？当然不会。那我们凭什么要去赌人品呢？

The general pure physical purifier, the problem is nothing more than a big noise, low working efficiency... But the use of static electricity and other technology products, there will be a risk of ozone over the standard. Those manufacturers can guarantee that after 10 years, no machine is ozone exceeding the standard? Of course not. So why are we going to bet on people?

至于像blueair，日系净化器及类似这种的净化器，使用一定的静电等技术，臭氧生成量相对较少，日常使用不需要担心。但同样无法保证不会有在长时间使用后绝对不会出现类似质量和故障导致的风险。风险或多或少一定存在，那为什么有这么多厂家使用这样的技术呢？

As for the Blueair, the daily purifier and such a purifier, the use of static electricity and other technologies, the ozone generation is relatively less, daily use does not need to worry about. But there is no guarantee that there will be no risk of similar quality and failure after long use. There are more or less risks. Why do so many manufacturers use such technology?

大部分用负离子噱头忽悠人的都是日企，但也有少数像豹米这种原本好好的非要闲得蛋疼不学好的。

Most of the people who use the negative ion gimmicks are Japanese companies, but there are a few of them like leopard rice.

为什么说“纯物理”是三观正确的？

Why is "pure physics" right?

静电等非“纯物理”技术讨厂商欢心的答案很简单：能节约成本多赚钱。

The answer is "simple physics", such as static electricity. The answer is simple: it can save money and make more money.

纯物理的空净，采用HEPA滤网+活性炭，是目前空净产品中最成熟的技术，但有一个缺点，就是价格太透明了 —— 用什么等级的产品，成本多少，售价多少，一目了然，普通用户只要会比较数字大小，都能简单的做横向对比来评测哪个产品的性价比高，哪个比较黑心。这么没主动权的地位，电器厂商们怎么能忍？

Pure physical empty net, using HEPA filter net + active carbon, is the most mature technology in the empty net products at present, but there is a shortcoming, that is the price is too transparent - what grade of the product, the cost, the price, at a glance, as long as the ordinary users can compare the number of small, can simply be compared to the horizontal comparison to evaluate Which product is cost-effective, which is more black hearted. How can the electrical appliance manufacturers tolerate such a lack of initiative?

厂商使用类似静电技术的原因，除了编造噱头外，大多是为了在不增加成本的条件下，实现更高，更漂亮的净化数值。可以花更少的钱，少用滤芯，也不用那么纠结电机的噪音问题了。

In addition to fabricating gimmicks, manufacturers use similar electrostatic techniques to achieve higher, more beautiful purification values without increasing the cost. It can spend less money, use less filter elements, and do not bother the noise of motor.

但对于我们这些用户来说，这些使用静电等技术来辅助HEPA的空净，价格并没有相对更便宜，有的甚至更贵。一些非纯物理净化产品的滤芯反而更容易报废，例如blueair的用户就必须承担半年更换一次滤芯的代价。

But for our users, these technologies, such as static electricity, are not cheaper and even more expensive for HEPA. The filter elements of some non pure physical purification products are easier to be scrapped, for example, the users of Blueair must bear the cost of replacing the filter cartridge half a year.

这些静电技术的本质，是让用户承担或高或低的风险，甚至更高的使用成本。而将这些风险或成本转化成了厂家的利润，所以这不是技术问题，是三观问题。

The essence of these electrostatic technologies is to enable users to bear high or low risks and even higher use costs. These risks or costs are transformed into profits of manufacturers, so this is not a technical problem, but a three view problem.

这时候就要夸一下小米了，的确小米空净的问题很多，也时常犯一些抄袭设计，欺瞒用户的脑残错误，但整体的设计还是很规矩的。而且小米的产品定价可以充分的反映出一个行业的生产成本应该是多少。小米的手机、空净、智能手环等等，很多产品都有这样的“定价功能”：当小米进入一个行业之后，往往就会把那些虚高的产品衬托暴露出来。

At this time, we have to exaggerate the millet, indeed a lot of millet empty net, and often make some plagiarism design, deceive the user's brain and disability error, but the overall design is very regular. Moreover, the pricing of millet can fully reflect the production cost of an industry. Millet mobile phone, empty net, intelligent hand ring and so on, many products have such "pricing function": when millet into an industry, they tend to expose the deficiency of the high - level products.

当小米用699做到300的CADR，用1499做到500的CADR，再看看那些挂着七八千的价格，叫嚣着自己来自海外，用了一堆七七八八的奇怪技术，但净化效率还不如小米的品牌，后者到底有多少利润空间，我

Millet with 699 to achieve 300 CADR, with 1499 to 500 of the CADR, and then look at the prices of those hanging seven thousand or eight thousand, clamoring that they come from overseas, with a pile of 7788 strange technology, but the efficiency of purification is not as good as millet brand, the latter in the end how much profit space, I