CN102423627B - Method and device for intelligent air purification - Google Patents

Abstract

The air purifying method of the present invention controls the valve to control the air flow path in the air freshener, and this can prevent catalyst filtering core from being blocked to result in catalyst failure. The valve switch is determined by the sensor and CPU to evaluate the quality of air. When the dust concentration in the air is higher than a good level, the CPU sends out a command to open the valve and temporarily close the reactant generator, which also prevents the reactant from leaking without passing through the catalyst. Until the dust concentration in the air reaches a good level, the CPU sends out an instruction to close the valve and also starts the reactant generator to generate a reactant which is decomposed on the surface of the catalyst together with the gas organic pollutants. The invention intelligently and orderly treats dust and gas pollutants in polluted air, is beneficial to prolonging the service life of the catalyst and reducing secondary pollution, and achieves the aim of real environmental protection.

Description

Method and device for intelligent air purification

【Technical field】

The patent of the present invention relates to the field of environmental protection, and more specifically, relates to an intelligent device that can be used for air purification.

【Background technique】

Pollutants in the air are mainly composed of two forms. One is larger particles such as dust, bacteria, and mold. Their molecular structure is complex and they are composed of many different substances or components. Micron to micron in size; one is chemical molecules such as gases, odors, and volatile organic chemicals, which have a simple chemical structure and are composed of several chemical elements, and are very small, only in the size of angstroms to nanometers.

To deal with dust or larger particles, electrostatic precipitators or high-efficiency dust filters are generally used. The effect can often reach 80%, or even more than 99.9%. However, it is not so easy to deal with VOCs with lengths ranging from angstroms to nanometers.

Oxidants produced by ozone generators or negative ion machines, such as ozone or hydroxyl radicals, are very useful reactants and belong to the oxidant category. They can decompose harmful substances from small to large chemical molecules, so they are widely used Purifying air. However, the purification efficiency of these oxidants is usually related to the concentration of ozone or free hydrogen in the fluid. If ozone or hydrogen are released directly into the air, their concentration will be diluted immediately; moreover, they tend to hit untargeted mediator molecules in the fluid and are prone to exhaustion instead of effectively oxidizing pollutants and organic compounds. Because of this reason, the general negative ion machine is not an effective air cleaning system, and it needs to reach a very high ozone concentration to effectively purify the air. In order to solve the above problems, some air purifiers use catalysts, such as titanium dioxide, to generate oxidants under the irradiation of ultraviolet light, and oxidize or completely oxidize gas pollutants. There are also molecular sieves based on the shape, orientation, size and hydrophilicity of different pollutants and organic compounds, which can simultaneously adsorb targeted organic compound molecules and oxidants. Then, in the nanometer pores in the molecular sieve, chemical reflection is carried out to oxidize pollutants.

Typically in such systems, the two main forms of pollutants in the air (particulate and gaseous pollutants) are sucked into the system at one time. The polluted air is first filtered by particulates before it enters the catalytic filter element for processing gas pollutants, where it undergoes a chemical reaction and decomposes gas pollutants. Due to the very high efficiency of the particle filter, it is not 100% able to remove the particles in the air. In the case of very polluted air, such as smoking places, all polluted air and oxidants are forced to pass through the particle filter device at one time before reaching the molecular sieve filter element. The particles in the polluted air cannot be removed at one time (see Figure 1), and the residual Odor-bearing particles (such as nicotine e-liquid particles, etc.) will accumulate on the surface of the catalyst, blocking the active base of the catalytic reaction, so that the subsequent gas pollutants or oxidants cannot effectively carry out chemical reactions. Over time, this air purification system not only cannot effectively remove odor pollutants in the air, but the dust accumulated on the surface of the catalyst has become a breeding ground for bacteria. Starting the air purifier with bacteria and accumulated dust on the surface of the catalyst is like starting an air purifier. There are machines that release pollutants (germs, odors, dust, etc.). Apart from frequent replacement of catalyst filter elements, there is no better solution. This will not only fail to achieve the purpose of environmental protection, but also create secondary pollution of a large number of spent catalyst filter elements.

【Content of invention】

In view of this, the present invention provides an air purification method that can effectively prevent catalyst failure.

An air purification method for separately purifying particulate pollutants and gaseous pollutants in the air sequentially, comprising the following steps:

A dust removal device, a catalyst filter element and a valve for controlling the flow direction of air in the air purification device are arranged in the air purification device; open or close the valve to control the flow direction of the air in the purification device, so that the high dust concentration The air does not pass through the catalyst filter element with relatively large wind resistance.

In the above-mentioned air purification method, the switch of the valve is controlled to control the path of air flowing in the air purifier, so as to prevent the blockage of the catalyst filter element and cause the catalyst to fail.

Further, when the dust concentration in the air is higher than the default value, the valve will be opened, and the air will pass through the dust removal device and be directly discharged from the outlet without wind resistance without passing through the catalyst filter element, so that the particles in the air will be processed first; Until the dust concentration is lower than the default value, the valve will be closed, and the air must pass through the dust removal device and the catalyst filter element to be discharged, so as to deal with the gaseous pollutants.

Further, when the valve is opened, an entrance without wind resistance is created.

Further, when the valve is closed, it is compactly connected with the catalyst filter element, so that after the air passes through the dust removal device, it must pass through the catalyst filter element before being discharged.

Further, the air purification device is also provided with a dust sensor and a central processing unit.

Further, the switch of the valve is controlled by the dust sensor and the central processing unit.

Further, the dust removal device also includes an electrostatic precipitator, and the dust sensor is used to measure the dust concentration in the surrounding environment, and then calculate the amount of accumulated dust contained in the electrostatic precipitator. When the accumulated dust amount is higher than A preset amount of dust can be accumulated, and the CPU will issue a warning that the electrostatic precipitator needs to be cleaned.

Further, the amount of accumulated dust that has been accommodated is calculated as follows:

Accommodated accumulated dust amount = (wind speed x air purification device start-up time x measured dust concentration in the surrounding environment) + the accumulated accumulated dust amount that the air purification device was started last time.

Furthermore, the electrostatic precipitator can be removed from the entire air cleaning device for cleaning.

Further, the catalyst filter element is a catalyst filter element for treating odor or gas pollutants.

Further, the air purification device is also provided with a reactant generator, the dust removal device is arranged at the upstream position of the reactant generator, and the valve and the catalyst filter element are arranged at the downstream position of the reactant generator .

Further, when the valve is opened, the reactant generator must be closed at the same time, so as to prevent the reactant from leaking out without the cooperation of the catalyst.

Further, the air purification device is further provided with an air extraction fan, which is used to drive air to flow from upstream to downstream in the air purification device.

Further, the dust removal device is used to remove particles with a size of one hundredth of a micron or more.

Further, the dust removal device includes an electrostatic precipitator.

Further, the dust removal device includes a high-efficiency particulate filter.

Further, the catalyst filter element is titanium dioxide.

Further, the catalyst filter element is a molecular sieve filter element.

Further, the reactant generator is an ultraviolet lamp that generates ozone and emits bactericidal wavelengths.

Further, the reactant generator is a reducing oxidant generator.

Further, the reactant generator is an oxidant generator.

Further, the reactant generator mentioned above can be an ultraviolet lamp that emits an effective wavelength and can irradiate the surface of titanium dioxide.

Further, a high-efficiency particle filter can also be arranged in front of the catalyst filter element.

Further, the ultraviolet light also irradiates the high-efficiency particulate filter to prevent the dust adhering to the high-efficiency particulate filter from multiplying bacteria.

Further, the air purification device also includes an odor sensor and a central processing unit.

Further, the odor sensor is used to measure the concentration of organic compounds in the surrounding environment, and then transmit the data to the central processing unit, and the central processing unit judges the speed of the fan.

Further, the electrostatic precipitator can be removed from the whole air cleaning device for cleaning.

In this intelligent air purification system, the pollutants in the air will be separated and purified sequentially. Firstly, the larger particles are treated to reduce their concentration in the treatment space to an ideal level, and finally the finer particles are treated. gas pollutants. Compared with the traditional one-time forcing of air through the high-efficiency particulate filter and deodorizing filter element, the residual dust will block the deodorizing filter element, making the deodorizing filter element prone to failure. To provide an air cleaning device that is highly efficient, environmentally friendly, and reduces secondary pollution.

An air cleaning device, comprising a housing with a fluid inlet and an outlet, the housing is provided with

(i) Dust removal device

(ii) The valve controlling the flow direction of air in the purification device

(iii) Reactant Generator

(iv) Catalyst filter element

(v) Exhaust fan

(vi) Dust sensor

(vii) CPU

It is characterized in that the dust removal device is arranged at the upstream position of the reactant generator, the valve and the catalyst filter element are arranged at the downstream position of the reactant generator, and the exhaust fan is arranged at any position, Drive the air flow from upstream to downstream. When the valve is closed, it is compactly connected with the catalyst filter element, so that the air must pass through the catalyst filter element to be discharged after passing through the dust removal device and the reactant generator.

When the valve is opened, an inlet without wind resistance is formed, and after the air passes through the electrostatic precipitator and the reactant generator, it is discharged from the outlet without wind resistance without passing through the catalyst filter element. Because the air with high dust concentration will not pass through the catalyst filter element with large wind resistance, the catalyst filter element is prevented from being polluted by dust, and its life cycle can be extended.

When the valve is opened, the reactant generator must be closed at the same time, so as to prevent the reactant from leaking out without the cooperation of the catalyst. In this way, even if the reactant generator is an ozone generator, the leakage of ozone will not be caused.

The switch of the valve is controlled by the dust sensor and the central processing unit.

The dust removal device is used to remove particles with a size of one hundredth of a micron or more.

The dust removal device also includes an electric dust collector.

The dust removal device also includes a high-efficiency particulate filter.

When the catalyst filter element is a molecular sieve filter element, the reactant generator can be an ultraviolet lamp that generates ozone and emits a bactericidal wavelength. In this way, in addition to generating an oxidizing agent for the molecular sieve filter element for oxidation reaction, it can also have the effect of strengthening sterilization.

When the catalyst filter element is a molecular sieve filter element, the reactant generator may be an oxidant generator. Because some gaseous pollutants must be oxidized before they can be decomposed.

When the catalyst filter element is a molecular sieve filter element, the reactant generator may be a reducing oxidant generator. Because some gaseous pollutants must undergo reduction and oxidation before they can be decomposed.

When the catalyst filter element is titanium dioxide, the reactant generator may be an oxidant generator.

When the catalyst filter element is titanium dioxide, the reactant generator can be an ultraviolet light lamp that emits an effective wavelength and can be irradiated on the surface of titanium dioxide, so that the ultraviolet light lamp can provide enough energy to titanium dioxide as an oxidizing gas pollutant chemical reaction.

A high-efficiency particle filter can also be arranged in front of the molecular sieve filter element. When the valve is closed, all air is forced through the molecular sieve filter, and the HEPA filter provides final protection for the molecular sieve filter. The ultraviolet lamp also irradiates the high-efficiency particulate filter to prevent the dust adhering to the high-efficiency particulate filter from multiplying bacteria.

The dust sensor measures the dust concentration in the surrounding environment, and then transmits the data to the central processing unit, and the central processing unit judges the switch of the shutter. The judgment of the central processing unit is still based on the comparison of the dust concentration and the dust concentration. When the dust concentration is higher than the default value, it means that the dust concentration is very high. Catalyst cartridges will not be affected. Therefore, it is necessary to open the valve and deal with dust contamination first. When the dust concentration is lower than the default value, it means that the dust concentration is ideal, and the electrostatic precipitator or the high-efficiency particulate filter can treat the dust in the air at one time, so the valve can be closed to concentrate on treating the gaseous pollutants.

The air purification device also includes an odor sensor and a central processing unit.

The odor sensor measures the concentration of organic compounds in the surrounding environment, and then transmits the data to the central processing unit, and the central processing unit judges the speed of the fan. In this way, the air is intelligently purified according to the concentration of different air pollutants.

The dust sensor measures the dust concentration in the surrounding environment, and then calculates the amount of accumulated dust that the electrostatic precipitator has accommodated. When the accumulated dust amount is higher than the preset value that can accumulate dust, the central processing unit will send out the need to clean the electrostatic dust collector device warning.

The amount of accumulated dust contained is calculated as follows:

Accommodated accumulated dust amount = (wind speed x air purification device start-up time x measured dust concentration in the surrounding environment) + the accumulated accumulated dust amount that the air purification device was started last time.

When the dust removal device is an electrostatic precipitator, it can be removed from the whole air cleaning device for cleaning.

Since different people have different sensitivity to different air quality environments, in special cases, some people are more sensitive to dust or odor concentration. In addition to controlling the valve switch, in any case, the user can use his own sense of smell to replace the dust sensor, and use his own judgment to replace the central processing unit to manually control the valve switch.

The air purification device of the present invention controls the switch of the valve to control the path of air flowing in the air purifier, so as to prevent the blockage of the catalyst filter element and cause the catalyst to fail. The valve switch is determined by evaluating the quality of the air through the sensor and the central processing unit. When the dust concentration in the air is high enough to exceed the good level, the central processing unit sends an instruction to open the valve, and also temporarily closes the reactant generator, which also prevents the reactant from passing through the catalyst. The next leak. Until the dust concentration in the air reaches a good level, the central processing unit issues an instruction to close the valve, and at the same time activate the reactant generator so that it can generate reactants, which together with the gaseous organic pollutants decomposes on the surface of the catalyst. The present invention intelligently and orderly treats the dust and gas pollutants in the polluted air, which is beneficial to prolong the life of the catalyst, reduce secondary pollution, and achieve the goal of true environmental protection.

【Description of drawings】

Fig. 1 is the structural representation of the purification of general air purification device;

Fig. 2 is the program operation diagram of central processing unit of invention to valve switch;

Fig. 3 is the structural representation of the embodiment of the air cleaning device of invention;

Fig. 4 is the structural representation of another embodiment of the air cleaning device of invention;

Fig. 5 is the gas pollutant purification effect of the present invention compared with the same type but without valve control process air purification technology;

Fig. 6 is a schematic diagram of the physical structure of the present invention.

【Detailed ways】

As shown in Figure 1, the general air cleaning device includes a housing (15), which mainly contains a dust removal part (14), such as an electrostatic precipitator, or a high-efficiency electrostatic precipitator, a reactant generator (16) and a catalyst filter core (17). When the catalyst filter element (17) is a molecular sieve filter element, the reactant generator (16) can be an ultraviolet lamp or an oxidant generator that generates oxygen and emits a sterilizable wavelength. When the catalyst filter element (17) is titanium dioxide, the reactant generator (16) can be an oxidant generator or an ultraviolet lamp that emits an effective wavelength and can irradiate the surface of the titanium dioxide (17). The device is provided with an exhaust fan at any position to drive air to flow from upstream (12) to downstream (20). Most of the dust or particles (11) have been removed (13) when the air passes through the electrostatic precipitator or high-efficiency electrostatic precipitator (14), and the remaining small and heavy dust or particles pass through the reactant generator (16), attached to the surface (18) of the catalyst filter core (17). Make the catalyst filter core (17) fail due to contamination. Finally, only a small amount of dust or particles, mixed with most of the dust or particles (11) in the air, enters the air purification device. After a long time, the dust (18) accumulated on the surface of the catalyst has become a breeding ground for bacteria. Starting the air purifier with bacteria and accumulated dust (18) on the surface of the catalyst is like starting a machine that will release pollutants ( bacteria, odors, dust, etc.). In addition to frequently changing the catalytic filter element (17), there is no better solution.

As shown in Figure 2, the central processing unit of the air cleaning device is to the program operation diagram of the valve switch,

The dust sensor measures the dust concentration in the surrounding environment, and then calculates the amount of accumulated dust that the electrostatic precipitator can accommodate. When the accumulated dust amount is higher than a certain preset value, the central processing unit will issue a warning that the electrostatic precipitator needs to be cleaned. Then the central processing unit will compare the amount of dust in the surrounding area with the default value. When the dust concentration is higher than the default value, the valve will be opened and the reactant generator will be turned off. The air purification device will continue to pump air from upstream to downstream. , until the dust concentration is lower than the default value. At this time, the organic compound sensor collects the concentration data of organic compounds in the surrounding environment of the air purification device, and then according to the concentration of organic compounds, estimates the chemical reaction time that the catalyst needs to decompose the gas pollutants, and adjusts the ventilation speed of the air purification device. But it can intelligently purify the air according to the concentration of different air pollutants.

As shown in Figure 3, the structural representation of air cleaning device of the present invention is as follows:

The air purification device includes a housing (15), which mainly includes a dust removal part (14), such as an electrostatic precipitator, or a high-efficiency electrostatic dust removal net, and a valve (22) that controls the flow direction of the air in the purification device. Device (16), catalyst filter core (17), dust sensor (23) and central processing unit (24). The dust sensor (23) is connected to the central processing unit (24), and the central processing unit (24) is connected to the valve (22) to control its switch. When the catalyst filter element (17) is a molecular sieve filter element, the reactant generator (16) can be an ultraviolet lamp or an oxidant generator that generates ozone and emits a sterilizable wavelength. A high-efficiency particulate filter can also be arranged in front of the molecular sieve filter element (17), and the ultraviolet lamp (16) also irradiates the high-efficiency particulate filter to prevent bacteria from adhering to the dust on the high-efficiency particulate filter. reproduce. When the catalyst filter element (17) is titanium dioxide, the reactant generator (16) can be an oxidant generator or an ultraviolet lamp that emits an effective wavelength and can irradiate the surface of the titanium dioxide (17).

The device is provided with an exhaust fan at any position to drive air to flow from upstream (12) to downstream (20). Most of the dust or particles (11) have been removed (13) when the air passes through the electrostatic precipitator or high-efficiency electrostatic precipitator (14), and the remaining small and heavy dust or particles pass through the reactant generator (16), leave from valve (22) again, can not adhere to the surface (18) of catalyst filter core (17), and can not make catalyst filter core (17) lose efficacy because of being polluted.

Another structural representation of the air cleaning device of the present invention as shown in Figure 4 is as follows:

When the dust sensor (23) measures the particle concentration in the air and reaches the ideal level (11a), the central processing unit (24) sends an instruction to close the valve (22), so that the valve (22) and the catalyst filter element (17) The reactant generator (16) that is compacted into one piece and also starts at the same time makes the air pass through the electrostatic dust collector (14) and the reactant generator (16) before being discharged through the catalyst filter element (17) . The reactant and gaseous organic pollutants are decomposed in the catalyst filter element (17).

As shown in Figure 5, the invention patent compares the gas pollutant purification effect of the same type but without the valve control process air purification technology. This test was carried out in a smoking room of 200 square feet and a floor height of 3 meters. Using the air purification device shown in Figure 1, the effectiveness of the air purification device in removing organic pollutants began to fail when the tenth cigarette was lit, and emitted The pollutants accumulated in the filter element will increase the pollutants. If the air purification device of the present invention (i.e. the empty air purification device shown in Fig. 3 and Fig. 4) is used, since the pollutants in the air can be treated effectively and in an orderly manner, the catalyst filter element for treating odor will not be polluted to failure, so Air purification units can permanently treat gaseous pollutants.

As shown in Figure 6, a physical structure diagram of the present invention, the fuselage includes a housing (607), an exhaust fan (606), an electrostatic precipitator (601) as the dust removal device of the device, and a dust removal device that can An ultraviolet light lamp (604) that generates ozone and emits a bactericidal wavelength is used as the reactant generator of the device, and a densely packed molecular sieve filter element (603) is used as the catalyst filter element, and high-efficiency particles can also be arranged in front of the molecular sieve filter element. filter screen (602). The ultraviolet lamp can also irradiate the surface of the high-efficiency particulate filter (602) to strengthen sterilization, and the valve (605) is arranged at the same level of the catalyst filter element. When the concentration of dust pollutants is high, the valve (605) is opened, and the air will not be discharged through the catalyst filter element (603), so that the air purification device can process the high concentration of dust pollutants first.

Claims (18)

1. an air purification method that makes airborne fume and gas pollutant precedence and separately purified, is characterized in that: described air purification method comprises the steps:

Dust arrester, catalyst filter core are set in air cleaning unit and for controlling the valve of air flow direction in described air cleaning unit; Open or close described valve, to control air flow direction in purifier, make the air of high dust concentration without the larger described catalyst filter core of windage;

Wherein, when airborne dust concentration is during higher than default value, described valve can be opened, and air is through described dust arrester, and without catalyst filter core directly never the outlet of windage discharge, make airborne particulate first processed; Until dust concentration is lower than default value, described valve can be closed, and air must just be discharged through described dust arrester and catalyst filter core, thereby processes gas pollutant;

When described valve is opened, cause the entrance that there is no windage; When described valve is closed, described valve becomes to be linked to be one with catalyst filter core is compact, makes air after described dust arrester, must just discharge through described catalyst filter core;

Described air cleaning unit is also provided with dust sensor and central processing unit, and the switch of described valve is controlled by described dust sensor and central processing unit;

Described air cleaning unit is also provided with reactant generator and extraction fan, and described dust arrester is arranged on described reactant generator upstream position, and described valve and described catalyst filter core are set in described reactant generator downstream position;

When described valve is opened, described reactant generator must cut out simultaneously, to prevent not having under catalyst is used in conjunction with, to cause reactant to leak;

Described extraction fan be used for driving air in described air cleaning unit from upstream to downstream flow.

2. air purification method according to claim 1, wherein, described dust arrester also comprises precipitator, described dust sensor is for measuring the dust concentration in surrounding environment, calculate again described precipitator and held accumulation amount of dust, when holding accumulation amount of dust higher than accumulating dust default value, described central processing unit can send the warning that need clean precipitator.

3. air purification method according to claim 2, wherein, the described accumulation amount of dust of having held is to calculate like this:

Having held accumulation amount of dust=(wind speed speed x air cleaning unit x start-up time has measured the dust concentration in surrounding environment) started air cleaning unit and held accumulation amount of dust+last time.

4. air purification method according to claim 2, wherein, described precipitator splits out clean from whole air cleaning unit.

5. air purification method according to claim 1, wherein, described catalyst filter core is for processing the catalyst filter core of smell or gas pollutant.

6. air purification method according to claim 1, wherein, described dust arrester is for removing the particulate of one of percentage micron or above size.

7. air purification method according to claim 1, wherein, described dust arrester comprises precipitator.

8. air purification method according to claim 1, wherein, described dust arrester comprises high-effect micro particle filtering net.

9. air purification method according to claim 1, wherein, described catalyst filter core is titanium dioxide.

10. air purification method according to claim 1, wherein, described catalyst filter core is molecular sieve filter element.

11. air purification methods according to claim 1, wherein, described reactant generator be produce ozone and send can germicidal wavelength ultraviolet lamp.

12. air purification methods according to claim 10, wherein, described reactant generator is oxygen reduction agent generator.

13. according to the air purification method described in claim 9 or 10, and wherein, described reactant generator is oxidant generator.

14. air purification methods according to claim 9, wherein, described reactant generator is for can send EWL, and the ultraviolet lamp of the titanium dioxide surface that can irradiate.

15. air purification methods according to claim 11, wherein, are also provided with high-effect micro particle filtering net before described catalyst filter core.

16. air purification methods according to claim 15, wherein, described ultraviolet lamp also irradiates described high-effect micro particle filtering net, in case attach to the dust of the online face of high-effect micro particle filtering, has an opportunity to occur bacterial reproduction.

17. air purification methods according to claim 1, wherein, described air cleaning unit also comprises smell sensor.

18. according to air purification method described in claim 17, and wherein, described smell sensor is used for measuring the concentration of the organic compound in surrounding environment, then transfer of data is caused to described central processing unit, and described central processing unit judges the speed of described extraction fan again.

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