Pocket filter

Pocket filter... Sounds like a marketing ploy, doesn't it? At first glance, this is just a compact air purification device. Many people buy, attracted by the convenience, thinking that it will solve all the problems with dust and allergens in a small room. But in reality everything is much more complicated. In my practice, and I am sure that of many of my colleagues, there is a huge difference between the promises and the actual effectiveness of such devices. Today I would like to share my observations, experimental findings and talk about what you should pay attention to if you really want to benefit from such a device.

What exactly is a 'pocket filter'?

The first thing that is important to understand is that the term 'pocket filter' is very broad. It refers to devices that differ in design and principle of operation. This could be a portable air purifier with a HEPA filter, or just a miniature air intake with activated carbon. And often 'pocket filters' are more like mini-fans with an attached filter, the efficiency of which leaves much to be desired. Such devices usually use standard mesh filtration, which traps only large dust particles. But for small aerosols, pollen, bacteria and viruses, it is practically useless.

The main problem with such devices is insufficient fan power. If the air flow is weak, then the filtration efficiency decreases. It's like trying to clean a bathroom with a weak stream of water - the effect will be minimal. In addition, often the design of 'pocket filters' does not provide a tight seal. Air, without passing through the filter, simply bypasses it around the edges, which reduces the cleaning efficiency. I have seen many examples where customers enthusiastically purchased such devices, and a week later complained about the lack of visible results.

In fact, to effectively purify air, you need to take into account the area of ​​the room and the speed of the air flow. Insufficient power is a recipe for disappointment. Therefore, choosingpocket filter, it is important to pay attention not only to its compactness, but also to the characteristics of the fan: rotation speed, the volume of air that it can pass through the filter in a certain time.

What filters are used in 'pocket filters' and how effective are they?

The most common type of filters inpocket filtersis a HEPA filter. It is really effective at trapping small particles of dust, pollen, bacteria and even viruses. But it is important to understand that HEPA filters cannot 'cleanse' the air of chemical contaminants, odors or gases. For this you need a carbon filter.

Activated carbon is an excellent absorber of gases and odors. But its effectiveness depends on the quality and quantity of coal. Cheap 'pocket filters' often use low carbon material which quickly becomes saturated and stops working. More expensive devices use high-quality carbon, which can be replaced. However, even when replaced, the effectiveness of the carbon filter decreases over time.

Don't forget about pre-filters. They are designed to capture large dust particles to extend the life of the HEPA filter. Most 'pocket filters' use a mesh filter, which is not very effective. More effective are filters made of non-woven material that can be washed. There are also combined filters that combine several types of filters for comprehensive air purification. They are usually more expensive, but also more effective.

Problem with filters and their replacement

One of the biggest disadvantagespocket filtersis the limited service life of the filters. Often manufacturers do not indicate exact dates, but only give general recommendations. But on average, the HEPA filter in a 'pocket filter' needs to be changed every 3-6 months, and the carbon filter every 1-3 months, depending on the degree of air pollution.

And here the next problem arises: where to buy a replacement? Not all stores carry filters for 'pocket filters'. You often have to order them online, which takes time and can be unprofitable. In addition, it is not always possible to find original filters, and you have to be content with non-original analogues, the quality of which may be questionable.

Tianjin Tongchang Junqi Cleaning Equipment Co., Ltd. cooperates with the Air Conditioning Research Institute of the China Institute of Building Sciences, which allows us to develop and use quality filters for various types of air purifiers, includingpocket filters. We are constantly improving our filters to ensure they are as efficient and durable as possible.

Real examples from practice

One day a girl approached me who boughtpocket filterfor your office. She complained that the filter was very weak and the air in the office was not cleaner. When I examined the device, it turned out that it uses a mesh filter, which is not capable of catching small dust particles. In addition, the fan was not powerful enough. I advised her to purchase a higher quality filter with a HEPA filter and activated carbon, and to use the device in a small space.

In another case, the client boughtpocket filterfor a car. He hoped that the filter would help get rid of the smell of cigarettes in the cabin. But after a week, he discovered that the carbon filter was already completely saturated and stopped working. I explained to him that the carbon filter requires regular replacement and advised him to usepocket filteronly if it is designed for use in a vehicle.

Sometimes, the problem is not in the device itself, but in improper operation. For example, the client installedpocket filteron a shelf where air does not circulate well. As a result, the filter did not work effectively and the air in the room was not cleaned.

What should you consider when choosing?

So, if you decide to purchasepocket filter, then here are some tips:

• Pay attention to the filter type.HEPA filter is for particles, carbon filter is for gases and odors.
• Consider the fan power.The more powerful the fan, the more effective the filter.
• Check for leaks.Air should not bypass the filter around the edges.
• Find out about filter lifespan and cost.Replacing filters is an inevitable expense.
• Read reviews from other customers.This will help you avoid buying a low-quality device.

In conclusion, I want to say thatpocket filter– this is not a panacea for all air problems. But if you choose the right device and operate it correctly, it can be a useful assistant in maintaining clean air in a small room.

Instead of a conclusion: an experiment with our own development

Recently we are in the company ?Tianjin Tongchang Junqi Cleaning Equipment? launched a small pilot project related to the development of a new generationpocket filtersusing electrostatic cleaning technology. This technology is based on the creation of an electric field that attracts dust particles and allergens. The results are still preliminary, but the first ones