Air purifier program development and design

2021-01-05 16:45:29 hongling

Air purifiers are also called "air cleaners", air cleaners, and purifiers. Air purifiers are becoming a "coveted" sunrise industry. At present, the household ownership rate of air purifiers in my country is less than 1‰, and there is huge room for industrial development. Some businesses even believe that with the public’s concern and attention to air quality, it will become a “standard configuration” for households in the future like color TVs, bringing an annual output value of tens of billions. However, compared with the carnival of merchants, consumers are more confused. After comparing it for a long time, I can't see why, is it useful to spend so much money?


At present, the prices of air purifiers sold on the market vary greatly, ranging from a few hundred yuan cheaper to tens of thousands of yuan. Industry insiders bluntly said that the cost of purifiers is not high, and the price of a few thousand yuan or even more than 10,000 yuan is falsely high. At present, there are mainly two types of purifiers on the market, active and passive. The active purifier releases purification factors to remove smoke, sterilize, and remove odors. However, this method is controversial in the international arena, because removing low-concentration pollutants in the air will release ozone, which is likely to cause secondary pollution. Passive purifiers adopt primitive purification methods, which physically adsorb pollutants in the air through filters. European and American countries basically use this technology. Either way, the cost will not be very high.


1. Brief introduction of air purifier program

1. The meaning of air purifier


Sandstorms, smog and other phenomena have serious air pollution and threaten people's health. The concentration of suspended particulates in the urban atmospheric environment generally exceeds the standard, the total emissions of motor vehicle exhaust pollutants are increasing rapidly, sulfur dioxide pollution has been at a high level, and nitrogen oxide pollution is increasing. There are many types of pollutants in indoor air, mainly including physical pollution (particles, dust, pollen, animal dander, etc.), biological pollution (bacteria, viruses, mold spores, etc.) and chemical pollution (NOx, SOx, and volatile organic compounds) Wait).


Air purifiers are used in the home, medical, and industrial fields. In the home field, stand-alone household air purifiers are the mainstream products in the market. The main function is to remove particulate matter in the air, including allergens, indoor PM2.5, etc., and it can also solve the indoor, underground space, and car volatile organic matter air pollution caused by decoration or other reasons. Since the release of air pollutants in a relatively closed space has the characteristics of persistence and uncertainty, the use of air purifiers to purify indoor air is one of the internationally recognized methods to improve indoor air quality.


2. The functional characteristics of the air purifier


Air purifiers can absorb, decompose or transform various air pollutants, and effectively improve air cleanliness. At present, household and commercial air purifiers that remove indoor air pollution are the main ones. By categorizing the product functions of the existing domestic and international air purifier mainstream brands on the market, the functions of the air purifier can be divided into two aspects: purification function and additional function. The five core functions of air purifiers are dust removal, odor removal, formaldehyde removal, PM2.5 removal and sterilization. Common additional functions are: humidification, intelligent air monitoring (smoke detection/hypoxia detection), timing, remote control, etc.


3. Related technologies of air purifiers


Existing air purifiers use a variety of different technologies and media to provide users with clean and safe air. Air purifiers can be roughly divided into three categories: 1) Passive purification (filter purification) The air is drawn into the machine with a fan, and the air is filtered through the built-in filter, which can mainly filter dust, odor, toxic gas and The role of killing some bacteria. 2) Active purification (no filter type) can be divided into silver ion technology, negative ion technology, low temperature plasma technology, photocatalyst technology, and plasmacluster ion technology according to the active sterilization principle of these products. 3) Double purification type (active purification + passive purification). At present, most air purifiers use multiple purification technologies and material media for purification at the same time.

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2. Purification principle of air purifier

Regarding the fine particles, what the air purifier needs to do is to keep the fine particles on the filter in some way. There are many ways to stop particulate matter, which can be summed up in two ways: the particulate matter hits itself, or the filter adsorbs the particulate matter through some force.


The former method is naturally more effective for larger particles, while the latter is more effective for smaller particles. The combination of the two methods is difficult to filter out those small particles-that is, the standard fine particles used to calibrate the efficiency of the filter (the particles with an aerodynamic diameter of 0.3 microns).


Purifiers that use consumable filters apply these two filtering principles at the same time; while for high-voltage electrostatic filters without consumables, adsorption is the main method, and only one of them is used.


For gaseous pollutants, the only feasible method currently is activated carbon. A possible improvement method is to add a catalyst on the basis of activated carbon adsorption, so that the adsorbed formaldehyde and other gaseous organic matter can be decomposed, thereby increasing the cumulative purification capacity of the filter.


In short, for different pollutants, the basic principle of air purifiers is to continuously circulate the indoor air, and adopt some means to adsorb the pollutants in the air on the filter, and then discharge the filtered air. To achieve the purpose of resisting pollution sources and purifying indoor air.

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3. Air purifier program development technology

The air purifier is mainly composed of a motor, a fan, an air filter and other systems. Its working principle is: the motor and fan in the machine circulate the indoor air, and the polluted air passes through the air filter in the machine to remove various pollutants. Or adsorption, some models of air purifiers will also install a negative ion generator at the air outlet (the high voltage in the negative ion generator generates DC negative high voltage during operation), which continuously ionizes the air to produce a large number of negative ions, which are sent out by the micro fan. The formation of negative ion airflow achieves the purpose of cleaning and purifying the air.


From the perspective of the working principle of air purifiers, there are mainly three types: passive, active, and active-passive hybrid (double purification). According to the air purifier technology for removing particulate matter in the air, there are mainly mechanical filter type, electrostatic electret filter type, high-voltage electrostatic dust collection, negative ion and plasma method.


1. Passive adsorption filtration purification technology (filter purification technology)


The technical principle of the passive air purifier is: the air is drawn into the machine with a fan, and the air is filtered through the built-in filter, which can filter dust, odor, toxic gas and kill some bacteria. The filter is mainly divided into: particulate filter and organic filter. The particulate filter is divided into coarse filter and fine particulate filter. The quality of the fans and filters of these products determines the air purification effect, and the location of the machine and the indoor layout will also affect the purification effect.


2. Active purification technology (no filter purification technology)


The fundamental difference between the technical principle of active air purifiers and passive air purification principles is that active air purifiers get rid of the restrictions of fans and filters, instead of passively waiting for indoor air to be drawn into the purifier for filtering and purification. Instead, it effectively and actively releases the purification and sterilization factors into the air, and through the characteristics of air diffusion, it reaches all corners of the room to purify the air without dead ends.


The technologies for purifying and sterilizing factors on the market mainly include silver ion technology, negative ion technology, low-temperature plasma technology, photocatalyst technology and plasmacluster ion technology. The biggest defect of this type of product is the problem of excessive ozone emission.


3. Double purification technology (active purification + passive purification)


This kind of purifier actually combines passive purification technology with active purification technology.

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Four, brand purchase recommendations for air purifiers

1. Famous brand of air purifier


At present, there are many brands of air purifiers on the market, and the quality is also uneven. Which brand of air purifier is better? The top ten brands of air purifiers that people often say include Philips, Sanyo, Midea, Gree, Panasonic, Sharp, Airmate, Yuanda, Honeywell, Yadu, etc. A new air purifier product has also appeared on the market. : Negative ion air purifier. At present, there are also some domestic manufacturers of air purifiers, and they cannot look for foreign air purifier brands one-sidedly when purchasing air purifiers.


When buying an air purifier, you should choose from price, function, brand and after-sales service. If you don’t know enough about air purifiers, you may wish to buy the recommended air purifier brands mentioned above, some domestic air purifier brands The price/performance ratio is relatively high.


2. Tips for remote purchase of air purifiers


(1) Purchase an air purifier according to the size of your home. When choosing a purifier, only scientific purification can better care for the health of the family. Generally speaking, a room of 20 square meters is suitable for use with an air purifier above 270m, while a room of 40-50 square meters should choose a 540m air purification. Device.


(2) Choose according to the principle of air purifier. The principle of air purifier mainly includes physical purification method, electrostatic purification method, chemical purification method, negative ion purification method and compound purification method. Generally speaking, the purification effect of the air purifier with the combined purification method will be better.


(3) Choose according to the after-sales service of the air purifier. When purchasing a purifier, try to choose a purifying filter with regeneration function, which is more convenient for maintenance.


(4) The room layout affects the purification effect. The inlet and outlet of the air purifier have a 360-degree circular design, and there are also unidirectional air inlets and outlets. If the product placement is not restricted by the room layout, you should choose a product with a circular inlet and outlet design.

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Different environments and different groups of people have different functional requirements for air purifiers. In the process of designing air purifiers, we must first understand the existing products on the market, the user's demand for the products, and clarify the product positioning, Applicable to the environment and target population, and fully familiar with the corresponding technologies for different functions. After clarifying the product positioning, define the functions of the product in a targeted manner according to the needs of users, arrange them in the order of priority of functions, and finally determine the functions of the product and select the technology corresponding to the function. Through this process, the air purifier we designed has a clearer target market, meets the needs of target users, and is conducive to the later promotion and marketing of the product.