Do you need an air purifier if the air quality is good?
The quality of air quality reflects the degree of air pollution, which is judged by the concentration of pollutants in the air. Air pollutants include PM2.5 particulate pollutants, harmful viruses such as bacterial viruses, and chemical harmful gases such as formaldehyde and benzene. Under the smog siege, the air purifier also became a hot item in 2014.
Some people think that the best small room HEPA air purifier is not needed in areas with good air quality, such as Hainan. This is actually a wrong understanding. In fact, in foreign countries, even in economically developed regions such as Europe, the United States, Japan, and South Korea, because people have a strong sense of health, even if the air quality is very good, people generally use air purifiers to remove indoor air quality. It is precisely because the outdoor air quality is good, and people have long hours of indoor activities, indoor dust, pollen, second-hand smoke, animal dander, human body odor, and other pollution, so the best rated small room air purifiers are more needed.
Therefore, the normal situation should be that light air purifiers can be used in areas with good air quality. In areas with poor air quality and complex pollutants, heavy-duty air purifiers can be applied to deal with severe and complex pollution environments.
The bad air environment, the harm to the human body is self-evident, the home is placed in an air purifier, if the conditions can choose a negative ion air purifier to clean the indoor air is also very useful to reduce pollution The harm of air to the human body.
As people’s attention to the living environment and various reports and interviews on environment and health and the rapid spread of science, society’s attention to the environment and health continues to rise. Among them, the attention to the air quality closely related to people’s health has continued to rise. What followed was the sales boom in a market segment, which was a new step in air purification.
For most of the existing residential houses, the fresh air system with filtration and purification is far from universal. Therefore, the indoor air purifiers of all major websites continue to be hot, and together they enter high heat, as well as automobile air purification products.
Since the car air conditioner itself has a filter element, many consumers feel confused about the trade-off between the car air conditioner filter and the car air purifier. In this article, Kun brand Xiao Erhe compares the similarities and differences between the two in order to let consumers make more choices for themselves.
Before comparing the similarities and differences between the two, let’s take a brief look at the air environment inside the car.
We need to first understand that air-conditioning filters and best small room hepa air purifier are all present to purify the air. So what needs to be purified in the air inside the car?
Among the first types of particulate contaminants, the highest content and most difficult to avoid are dust particles, such as PM2.5, PM10, which are now well known to the public, and various solid particles that are visible to the naked eye. These particles are characterized by a long history, ubiquitous and unpredictable, and are therefore the most important source of pollution for all air purification products at the beginning of the design.
Another important class of pollutants are harmful gases, most typically volatile organic compounds (VOCs) such as formaldehyde, benzene and toluene. This type of pollutant is characterized by continuous release from the interior of the vehicle for several years. Therefore, in recent years, materials such as activated carbon that can absorb harmful gases by using a large surface area have been widely used in air purification product filters.
The main function of the car air conditioner is to adjust the air environment of the car from the wind speed, temperature and humidity. The core components include the compressor, control unit, radiator, evaporator and the entire air duct system. When the air conditioner is working, the wind inside or outside the vehicle can be sucked into the blower, and then purified and filtered by the air conditioner filter, and then sent to the air outlets in the vehicle through the air duct to drive the air circulation in the entire cab. Such a car air-conditioning filter is transformed into a car air purifier by utilizing the function of air supply in the car. It has the advantages of internal and external circulation and ventilation.
Schematic diagram of automotive air conditioning cycle
The function and principle of the car air purifier is much simpler. The core components are the blower and the filter element. The air blower drives the airflow through the filter element, and then the filter element is used to remove the pollutants in these airflows.
With such a preliminary understanding, it is easier to compare the similarities and differences between the two.
The effect of air purification in the vehicle is determined by factors such as the air flow rate at the filter site (related to the air flow rate of the blower and the wind resistance of the filter), the filtration efficiency, the amount of space affected, and the air circulation path at the location of use. The most important of these is the flow rate and filtration efficiency. For air conditioners, the air circulation path cannot be changed. Only the wind resistance of the filter element will affect it, and the filtering effect is completely determined by the filter element. Therefore, the main content that can be discussed is the filter element.
From the comparison of filtration capacity: the types of automotive air-conditioning filter elements vary widely, and the shape of the filter elements used in each model is different. The filter cartridges of the same model are divided into single-effect double-effects. Different brands of filter cartridges use different filter materials, which results in a very large price gap, which is as low as 10 yuan for the unit price in the auto parts city. A few hundred, so that most consumers are at a loss. Therefore, under such circumstances, most of the owners have chosen the principle of “no need to spend money.”
However, in fact, air conditioner cartridges that are too inexpensive are generally unable to guarantee the performance and filtration of their filter materials, and are not within the scope of today’s discussion. We only discuss those filters that meet national standards, or that can reach the upstream level of the industry.
Filter efficiency. From the test method, the standard commonly used in domestic standards requires that the volume of the automotive air conditioning filter should not be less than 800 cm3 (about 20 cm × 20 cm × 2 cm), which is due to the consideration of the air volume of the air conditioning system. After all, the amount of air is closely related to the area of the wind, but to ensure that the effect of the filter is good enough, the life is long enough, and the filter material in the filter must also reach a certain volume. So as long as the model is not too strange, its air-conditioning filter can reach this minimum. However, the air purifier filter has no corresponding standard to specify its minimum volume. Some old air purifiers have a filter cartridge that is only half the size of the air conditioner. Considering again that it is necessary to include a particulate filtering portion and an activated carbon portion, its containment ability and life can be imagined.
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