WO2024082419A1

WO2024082419A1 - Air purifier

Info

Publication number: WO2024082419A1
Application number: PCT/CN2022/139859
Authority: WO
Inventors: 路建霞
Original assignee: 路建霞
Priority date: 2022-10-17
Filing date: 2022-12-19
Publication date: 2024-04-25
Also published as: CN115957596A

Abstract

An air purifier, comprising a box (10), a laminar flow purification assembly, an air intake driver (11), and a controller (12). Opposite side walls of the box (10) are respectively provided with an air inlet (101) and an air outlet (102), the air intake driver (11) being mounted at the air inlet (101); the laminar flow purification assembly is mounted in the box (10), and the laminar flow purification assembly comprises a partition plate (21), a circulating pump (22), and liquid film carrier plates (23); the partition plate (21) is horizontally fixed in the box (10) and divides the interior of the box (10) into an upper liquid storage cavity and a lower mounting cavity; the liquid film carrier plates (23) are vertically arranged in the lower mounting cavity at intervals, a purification channel being formed between any two adjacent liquid film carrier plates (23), and absorption liquid being coated on the surfaces of the liquid film carrier plates (23); a recess (103) is provided on the side of the lower mounting cavity close to the air outlet (102), the circulating pump (22) is mounted in the recess (103), a liquid discharge end of the circulating pump (22) is in communication with the upper liquid storage cavity by means of a liquid transport pipeline, and permeation holes (211) are uniformly distributed on the partition plate (21) for penetration of the absorption liquid into the liquid film carrier plates (23).

Description

An air purifier

Technical Field

The present application relates to the field of air purification, and in particular to an air purifier.

Background technique

Existing air purification technologies mainly include passive adsorption filtration purification technology and active air purification technology. Among them, the principle of passive air purifiers is: using a fan to suck air into the purifier, and filtering the air through the built-in filter of the purifier, which can filter dust, odor, toxic gases and kill some bacteria. The filter is mainly divided into a particle filter and an organic filter, and the particle filter is further divided into a coarse particle filter, a fine particle filter, etc.; the difference between the principle of active air purifiers and the principle of passive air purification is that active air purifiers get rid of the restrictions on fans and filters, and actively release purification and sterilization factors into the air. Through the characteristics of air diffusion, it reaches every corner of the room to purify the air without dead ends. The technologies for purification and sterilization factors on the market mainly include silver ion technology, negative ion technology, low-temperature plasma technology, photocatalyst technology, and net ion group ion technology.

For passive air purifiers, there are the following shortcomings:

1. As for filtering particulate matter, the pore size of the filter cannot be too small, otherwise the resistance will be very large and the flux will be greatly affected. There is almost no removal effect on fine particles, especially those with a size below the micron level. The finer the particles, the easier they are to reach deep into the lungs and cause harm to the human body. Therefore, the purification effect is poor.

2. In order to improve the filtering efficiency, but the filter mesh aperture cannot be increased, the wind pressure of the fan has to be increased to overcome the resistance and ensure the air volume, which undoubtedly increases power consumption and noise pollution.

3. The filter should be replaced frequently, otherwise the resistance of the fan will increase with the accumulation of particulate matter, greatly affecting the filtration efficiency. It is not only expensive, but also easy to cause secondary pollution because the fabric is generally chemical fiber.

4. Organic gases such as formaldehyde are removed by adsorption, but adsorption is reversible, that is, it will also desorb and become free during adsorption, so the adsorption medium needs to be replaced frequently, otherwise it will easily cause a decrease in adsorption efficiency.

5. The adsorption efficiency is low. Since the thickness of the adsorption layer is generally in the centimeter level, while the wind speed is in the meter level, the time for wind to pass through the adsorption layer is only in the millisecond level, and there is not enough time for diffusion. Therefore, the efficiency of one-time filtration and adsorption is very low. The adsorption rate can only be increased by circulating large air volume, which requires increasing the air volume.

Water foam/falling film purification technology is commonly used in the petrochemical field as an industrial tail gas treatment technology. It is suitable for washing and purification before high-concentration tail gas emissions. Generally, the absorption liquid is dispersed on the membrane medium by spraying, such as ceramic, stainless steel, plastic ring, saddle, and tubular media. The advantages are large processing capacity, long air residence time, small resistance coefficient, and high efficiency; but there are the following problems:

1. Since this technology requires the absorption liquid to be evenly distributed, a higher spraying speed is required to disperse the absorption liquid into fine droplets and wet every part as evenly as possible. Therefore, a large amount of mist liquid will be generated during the spraying process, and most of the mist liquid will be intercepted by defoaming devices such as baffles and cyclone separators, but some of the mist liquid will still escape. Activated carbon adsorption boxes are often set up downstream to intercept again, and a small amount of mist or aerosol liquid will still escape, which will not only cause absorption liquid loss, but also cause environmental pollution; therefore, higher purification towers and multi-stage purification are often used, so it is not suitable for indoor use;

2. Due to the huge size of the equipment, the system wind resistance will reach more than 1kPa, requiring a high-power fan, which will generate high noise and high energy consumption;

3. Uniform distribution is an idealized state. In fact, since spraying cannot be uniform, liquid often deviates when flowing from top to bottom, resulting in local areas without absorption liquid. The resistance of the area without absorption liquid is small, causing air flow short circuit and affecting the absorption effect.

In view of this, the present invention is proposed.

Summary of the invention

In view of this, the present application proposes an air purifier, which dissolves or disperses pollutants in an absorbing liquid by free diffusion and exchange with the absorbing liquid substance to improve the purification effect.

In order to achieve the above-mentioned purpose of the present invention, the following technical scheme is adopted:

An air purifier comprises a box body, a laminar flow purification component, an air inlet driver and a controller, wherein opposite side walls of the box body are respectively provided with an air inlet and an air outlet, the air inlet driver is installed at the air inlet, the laminar flow purification component is installed in the box body, the controller is installed on the front side of the box body and is used to control the laminar flow purification component and the air inlet driver, the laminar flow purification component comprises a partition, a circulation pump and a liquid film carrier plate, the partition is horizontally fixed in the box body and divides the box body into an upper liquid storage chamber and a lower mounting chamber, the liquid film carrier plates are vertically spaced in the lower mounting chamber, a purification channel is formed between any two adjacent liquid film carrier plates, the surface of the liquid film carrier plates is coated with absorbent liquid, a groove is provided on the side of the lower mounting chamber close to the air outlet, a circulation pump is installed in the groove, the liquid outlet end of the circulation pump is connected with the upper liquid storage chamber through an infusion pipeline, and penetration holes for penetrating the absorbent liquid into the liquid film carrier plates are evenly provided on the partition plate.

Preferably, the width of the purification channel is between 2 mm and 20 mm.

Preferably, the liquid film carrier is a thin sheet structure made of hydrophilic material.

Preferably, the liquid-to-gas weight ratio in the box is between 0.1 and 2.

Preferably, the liquid film carrier plate comprises a front liquid film carrier plate and a rear liquid film carrier plate, and an extension line of the front liquid film carrier plate is obliquely intersected with an extension line of the rear liquid film carrier plate.

Preferably, the rear liquid film carrier plates are multiple groups arranged front to back, and the purification channels formed by the multiple groups of rear liquid film carrier plates are staggered front to back.

Preferably, the solute of the absorption liquid is a liquid medium that is easily soluble in water, difficult to volatilize and has air purification effect.

Preferably, the absorption liquid is an air purification absorption liquid, and the air purification absorption liquid comprises water and a chemical solute; the chemical solute is selected from at least one of alcohols, ammonium salts, hydroxylamines, compounds containing primary/secondary amine functional groups and their salts.

Preferably, the pollutants purified by the air purifier include VOCs, dust, smoke and aerosols.

Beneficial effects of this application:

The air purifier of the present invention adopts a hydrophilic liquid film carrier plate with a large specific surface area, which can construct a material and energy exchange area as large as possible in a smaller volume space, achieve efficient removal of pollutants, and have a higher efficiency ratio.

The air purifier of the present invention is suitable for air purification with low pollution concentration in closed or semi-closed spaces, such as indoors, in cars, in warehouses, in tunnels, on streets and other places. It can effectively absorb pollutants including dust, smoke and gas, and the smaller the particles, the better the effect. Specifically, by exchanging substances through free diffusion rather than filtering, a larger gas channel can be established to achieve a large flow rate and low resistance, so the air circulates faster, the noise is lower, and it will never be blocked.

The air purifier of the present invention uses a substance that is easily soluble in water and difficult to volatilize, which can effectively control the evaporation of the absorption liquid, thereby controlling the air humidity, and can maintain a comfortable humidity by replenishing water when humidification is required. It is particularly suitable for dry areas or winter.

The absorption liquid in the present invention contains a substance that reacts with formaldehyde condensation, which can effectively fix formaldehyde without causing secondary pollution. Moreover, the chemical solute is a biodegradable substance, which can be directly biodegraded through a septic tank or purified and recycled by a professional organization without generating difficult-to-degrade waste, thus truly realizing a green cycle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective schematic diagram of an air purifier according to an embodiment of the present application;

FIG2 is a schematic diagram of the internal structure of FIG1 (front view);

FIG3 is a schematic diagram of the internal structure of FIG1 (top view);

The housing 10 , the air inlet 101 , the air outlet 102 , the groove 103 , the air inlet driver 11 , the controller 12 , the partition 21 , the penetration hole 211 , the circulation pump 22 , and the liquid film carrier plate 23 .

Detailed ways

The technical solution of the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.

Please refer to FIG. 1 to FIG. 3 , this embodiment discloses an air purifier, including a housing 10 , a laminar flow purification component, an air inlet driver 11 and a controller 12 .

Among them, the opposite side walls of the box body 10 are respectively provided with an air inlet 101 and an air outlet 102. The box body 10 is preferably a rectangular structure. The air inlet 101 and the air outlet 102 are respectively provided at the center of the left and right sides of the box body 10. An air inlet drive 11 is installed at the air inlet 101. The air inlet drive 11 is preferably a fan, which is used to introduce external air into the box body 10 for filtering.

The laminar flow purification component is installed in the box 10, and the controller 12 is installed on the front of the box 10 to control the laminar flow purification component and the air inlet driver 11. The front of the box 10 is also provided with a display screen electrically connected to the controller, and the display screen is used to display filtering parameters.

As shown in Figure 2, the laminar flow purification component includes a partition 21, a circulation pump 22 and a liquid film carrier 23. The partition 21 is horizontally fixed in the box body 10 and divides the box body 10 into an upper liquid storage chamber and a lower installation chamber. The liquid film carrier 23 is vertically spaced in the lower installation chamber, and a purification channel is formed between any two adjacent liquid film carriers 23. The surface of the liquid film carrier 23 is coated with absorption liquid. A groove 103 is provided on one side of the lower installation chamber close to the air outlet 102. The circulation pump 22 is installed in the groove 103. The liquid outlet end of the circulation pump 22 is connected to the upper liquid storage chamber through an infusion pipeline. The partition 21 is evenly provided with penetration holes 211 for penetrating the absorption liquid into the liquid film carrier.

Based on the above-mentioned air purifier, the liquid film carrier 23 is coated with an absorption liquid, and the external air is input into the purification channel through the air inlet driver 11. When the air passes through the liquid film carrier 23, the molecular thermal motion of the gas and the Brownian motion of the pollutant particles are utilized to fully exchange substances with the liquid film carrier 23, so that the pollutants are dissolved or dispersed in the absorption liquid, thereby eliminating particulate matter and harmful gases in the air, and then the active or toxic pollutants, such as formaldehyde, react with the active ingredients in the liquid to generate non-volatile and low-toxic substances, thereby avoiding the pollution caused by the re-volatilization of harmful gases. The absorption liquid on the liquid film carrier 23 flows slowly downward under the action of gravity, and then gathers in the groove 103, and is input into the upper liquid storage cavity again through the circulation pump 22, and is coated on the liquid film carrier 23 again through the penetration hole 211, so as to achieve the purpose of reuse. The absorption liquid on the liquid film carrier 23 can be replaced after being used for a period of time.

In an optional embodiment of the present application, the absorption liquid can be coated on the liquid film carrier 23 by gravity, infiltration/capillary action, centrifugal force alone or in combination, and the coated absorption liquid must fully cover the liquid film carrier 23.

Specifically, the material of the liquid film carrier 23 is a single metal (such as iron) or an alloy (such as aluminum alloy), or it can be a material containing natural fibers such as bamboo, wood, plant leaves, and biomass of animal fur. It can also be an inorganic material, such as glass, cement, gypsum, quartz, limestone, granite, and synthetic fiber board. The material selection of the liquid film carrier 23 is relatively wide.

Specifically, the shape of the liquid film carrier 23 can be sheet, tube, column, preferably a thin sheet structure of hydrophilic material, and the thickness of the liquid film carrier 23 is not more than 10 mm, so that more liquid film carriers 23 can be arranged in a limited space, which helps to increase the coating amount of the absorption liquid.

In an optional embodiment of the present application, the solute of the absorption liquid is a liquid medium that is easily soluble in water, difficult to volatilize, and has air purification effect, such as monohydric or polyhydric alcohol, ammonia, hydroxylamine, or organic substances with less than 15 carbon atoms in the molecular structure and containing primary amine and secondary amine functional groups and their salts.

In order to ensure the absorption effect and reduce air resistance, the gap of the purification channel should be as small as possible, preferably not more than 50 mm. Preferably, the width of the purification channel is between 2 mm and 20 mm, which has a high cost performance.

In this embodiment, the circulation amount of the absorption liquid is determined according to the concentration of air pollutants. Preferably, the liquid-to-gas weight ratio in the box 10 is between 0.1 and 2, wherein the greater the concentration of air pollutants, the greater the liquid-to-gas weight ratio, and the smaller the concentration of air pollutants, the smaller the liquid-to-gas weight ratio.

In an optional embodiment of the present application, an absorption liquid cooling or heating device can be installed. Since the liquid film carrier plate 23 has a large heat exchange area and high heat exchange efficiency, it does not require a high temperature difference when directly exchanging heat with the air like an ordinary air conditioner. Therefore, the operating temperature of the cooling and heating device can be close to the target air temperature, thereby reducing the load of the air conditioning device and achieving the purpose of energy saving. Moreover, since the temperature difference with the target temperature is small, especially in summer, the temperature of the blown wind is close to the ambient temperature, and the human body feels more comfortable.

In an optional embodiment of the present application, the liquid film carrier 23 includes a front liquid film carrier and a rear liquid film carrier, and the extension line of the front liquid film carrier is obliquely intersected with the extension line of the rear liquid film carrier. Preferably, the front liquid film carrier and the wind direction initially output by the air inlet driver 11 are at an acute angle, and the angle is preferably between 5°-10°, so as to facilitate uniform coating of the absorption liquid and ensure uniform clearance of the purification channel to ensure absorption effect. The rear liquid film carrier is a plurality of groups arranged front and back, and the purification channels formed by the plurality of groups of rear liquid film carriers are staggered front and back. By staggering the purification channels front and back, the gas flow direction can be changed, so that the liquid film material exchange is more sufficient, which is conducive to the dissolution or dispersion of pollutants in the absorption liquid.

In an optional embodiment of the present application, pollutants purified by the liquid film carrier 23 include VOCs, dust, smoke and aerosols.

The air purifier of this embodiment adopts a hydrophilic liquid film carrier plate 23 with a large specific surface area, which can construct the largest possible material and energy exchange area in a smaller volume space, achieve efficient removal of pollutants, and have a higher efficiency ratio.

The air purifier of this embodiment is suitable for air purification with low pollution concentration in closed or semi-closed spaces, such as indoors, in cars, in warehouses, in tunnels, on streets and other places. It can effectively absorb pollutants including dust, smoke and gas, and the smaller the particles, the better the effect. Specifically, by exchanging substances through free diffusion rather than filtering, a larger gas channel can be established to achieve a large flow rate and low resistance, so the air circulates faster, the noise is lower, and it will never be blocked.

The air purifier of this embodiment uses a substance that is easily soluble in water and difficult to volatilize, which can effectively control the evaporation of the absorption liquid, thereby controlling the air humidity, and can maintain a comfortable humidity by adding water when humidification is needed. It is particularly suitable for dry areas or winter.

Example 2

Compared with Example 1, this embodiment is different in that the absorption liquid is an air purification absorption liquid, and the air purification absorption liquid includes water and a chemical solute; the chemical solute is selected from at least one of alcohol, ammonium salt, hydroxylamine and compounds containing primary amine/secondary amine functional groups and their salts.

Specifically, the pH value of the air purification absorption liquid is 2-5; the percentage of chemical solutes in the air purification absorption liquid is 10%-90%; the number of carbon atoms of the alcohol is not more than 15; the alcohol is 1,2-propylene glycol, 1,3-propylene glycol or glycerol; the number of carbon atoms of the compound containing primary/secondary amine functional groups and its salts is not more than 15; the compound containing primary/secondary amine functional groups and its salts are selected from at least one of ethylamine, propylamine, butylamine, diethylamine, dipropylamine and dibutylamine.

The absorption liquid in this embodiment contains a substance that reacts with formaldehyde condensation, which can effectively fix formaldehyde without causing secondary pollution. In addition, the chemical solute is a biodegradable substance and can be directly biodegraded through a septic tank or purified and recycled by a professional organization without generating difficult-to-degrade waste, thus truly realizing a green cycle.

The technical solution of the present application is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the present application. Derivations and modifications made by those skilled in the art based on the specific embodiments of the present application also fall within the scope of protection of the present application.

Claims

An air purifier comprises a housing (10), a laminar flow purification component, an air inlet driver (11) and a controller (12), wherein opposite side walls of the housing (10) are respectively provided with an air inlet (101) and an air outlet (102), the air inlet driver (11) is installed at the air inlet (101), the laminar flow purification component is installed in the housing (10), the controller (12) is installed on the front side of the housing (10) and is used to control the laminar flow purification component and the air inlet driver (11), and is characterized in that:

The laminar flow purification component comprises a partition (21), a circulation pump (22) and a liquid film carrier (23); the partition (21) is horizontally fixed in a box body (10) and divides the box body (10) into an upper liquid storage chamber and a lower installation chamber; the liquid film carrier (23) is vertically spaced in the lower installation chamber, and a purification channel is formed between any two adjacent liquid film carriers (23); the surface of the liquid film carrier (23) is coated with an absorption liquid; a groove (103) is provided on one side of the lower installation chamber close to the air outlet (102); a circulation pump (22) is installed in the groove (103); the liquid outlet end of the circulation pump (22) is connected to the upper liquid storage chamber through a liquid infusion pipeline; and penetration holes (211) are evenly provided on the partition (21) for penetrating the absorption liquid into the liquid film carrier (23).
An air purifier according to claim 1, characterized in that the width of the purification channel is between 2 mm and 20 mm.
An air purifier according to claim 2, characterized in that the liquid film carrier is a thin sheet structure made of hydrophilic material.
An air purifier according to claim 1, characterized in that the liquid-to-gas weight ratio in the box (10) is between 0.1 and 2.
An air purifier according to claim 4, characterized in that the liquid film carrier plate (23) comprises a front liquid film carrier plate and a rear liquid film carrier plate, and the extension line of the front liquid film carrier plate is obliquely intersected with the extension line of the rear liquid film carrier plate.
An air purifier according to claim 5, characterized in that the rear liquid film carrier plates are multiple groups arranged front to back, and the purification channels formed by the multiple groups of rear liquid film carrier plates are staggered front to back.
An air purifier according to claim 1, characterized in that the solute of the absorption liquid is a liquid medium that is easily soluble in water, difficult to volatilize and has air purification effect.
An air purifier according to claim 7, characterized in that the absorption liquid is an air purification absorption liquid, and the air purification absorption liquid comprises water and a chemical solute; the chemical solute is selected from at least one of alcohols, ammonium salts, hydroxylamines, and compounds containing primary amine/secondary amine functional groups and their salts.
An air purifier according to claim 8, characterized in that the pollutants purified by the air purifier include VOCs, dust, smoke and aerosols.