Air purification device and control method thereof

Abstract

The present invention relates to the technical field of household appliances, and discloses an air purification device and a control method thereof. The air purification device includes a housing provided with an air inlet and an air outlet; a chemical condensation module including a first condensation chamber and a coagulant injection unit, the coagulant injection unit being adapted to inject a coagulant into the first condensation chamber to promote agglomeration of particles in the air entering the first condensation chamber; and an acoustic condensation module including a second condensation chamber and an acoustic wave generating unit, the acoustic wave generating unit being adapted to generate acoustic waves to promote reagglomeration of particles in the air entering the second condensation chamber from the first condensation chamber. The present invention utilizes the chemical condensation module to increase the particle size of fine particulate pollutants in the air, and utilizes the acoustic wave condensation module to drive vibration and collision between particles, ensuring that the fine particulate pollutants can be fully condensed, thereby further increasing the particle size of the particles, facilitating subsequent separation of the particle pollutants, and thus improving the purification efficiency of the fine particles.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an air purification device and a control method thereof. Background Art

[0002] How to efficiently remove fine particulate pollutants from the air is a problem that technicians in this field urgently need to solve. Summary of the Invention

[0003] In view of this, the present invention provides an air purification device and a control method thereof to solve the problem that the air purification devices in the prior art cannot efficiently remove fine particle pollutants in the air.

[0004] In a first aspect, the present invention provides an air purification device, comprising a shell, a chemical condensation module, and an acoustic condensation module. An air inlet and an air outlet are provided on the shell. The chemical condensation module is arranged in the shell, and the chemical condensation module comprises a first condensation chamber whose air inlet end is connected to the air inlet and a coagulant injection unit arranged in the first condensation chamber, and the coagulant injection unit is suitable for injecting coagulant into the first condensation chamber to promote the agglomeration of particulate matter in the air entering the first condensation chamber. The acoustic condensation module is arranged in the shell, and comprises a second condensation chamber arranged between the first condensation chamber and the air outlet, and a sound wave generating unit arranged in the second condensation chamber, and the sound wave generating unit is suitable for generating sound waves to promote the re-agglomeration of particulate matter in the air entering the second condensation chamber from the first condensation chamber.

[0005] In an optional embodiment, the chemical condensation module further includes a plurality of diversion units, which are arranged at intervals in the first merging chamber along the direction of gas flow, and the diversion units include a diversion plate and a plurality of diversion channels spaced apart on the diversion plate. Along the direction of gas flow, the diversion channels on two adjacent diversion plates are staggered with each other. By setting up a plurality of diversion units, it is possible to effectively divert the air entering the first merging chamber, so that the particulate matter in the air can be evenly diffused throughout the entire first merging chamber, thereby improving the purification effect of the particulate matter. In addition, in the present application, the diversion channels on the two adjacent layers of diversion plates are staggered, which is more conducive to increasing the probability of collision between the particles.

[0006] In an optional embodiment, the coagulant injection unit is arranged across the first merging chamber along the gas flow direction, and the coagulant injection unit divides the first merging chamber into a first space and a second space that are interconnected; wherein, the first space is connected to the air inlet, and the second space is connected to the second merging chamber, and the aperture d1 of the diversion channel of the diversion unit located in the first space is smaller than the aperture d2 of the diversion channel of the diversion unit located in the second space.

[0007] In the above embodiment, since some particulate matter adheres to the highly viscous cloud-like coagulant and then adheres to the nearby particulate matter, thereby increasing the particle size of the particulate matter, the diversion channel of the second space located at the outlet gradually increases, preventing the diversion channel at the outlet from being partially blocked due to the large particle size of the particulate matter agglomeration and the overly dense distribution of the particulate matter.

[0008] In an optional embodiment, the distance between two adjacent diversion channels on the same diversion plate is between 5 mm and 8 mm.

[0009] In an optional embodiment, d1 is between 2 mm and 4 mm, and d2 is between 4 mm and 6 mm.

[0010] In an optional embodiment, the first merging chamber has a merging chamber shell that is convex in the middle and gradually shrinks toward both ends, and the coagulant injection unit is arranged in the middle position of the merging chamber shell.

[0011] In an optional embodiment, the coagulant injection unit includes a plurality of nozzles connected in series via a pipeline, each nozzle being adapted to spray the coagulant in a mist form into the first agglomeration chamber. The nozzles spray the coagulant horizontally in all directions to cover as much particulate pollutants as possible. The mist cloud, which has a certain diffusion angle and a surface with high adhesion activity, is sprayed by the nozzles. The mist cloud is adsorbed on the surfaces of fine particulate pollutants and some coarse particulate pollutants, causing the fine particles to form larger agglomerates. Some coarse particulate pollutants also adsorb the fine pollutants to form larger agglomerates.

[0012] In an optional embodiment, the air purification device further includes a primary filtration unit, disposed between the air inlet and the chemical condensation module, for preliminary filtering of particulate matter in the air. The primary filtration unit can initially filter out hair and large particles of pollutants in the air. The air, initially purified by the primary filtration unit, then enters the chemical condensation module.

[0013] In an optional embodiment, the air purification device further includes a first concentration detection unit, disposed between the primary filtration unit and the chemical coagulation module, adapted to detect particle concentration information in the air flowing into the first coalescing chamber. The provision of the first concentration detection unit enables precise control of the coagulant injection rate based on the particle concentration information in the air flowing into the first coalescing chamber, thereby improving the purification efficiency of fine particles.

[0014] In an optional embodiment, the sound wave generating unit includes a plurality of sound wave generators arranged at intervals in the second combining chamber.

[0015] In an optional embodiment, the sound wave generating unit is suitable for generating sound waves of 1000 Hz-3000 Hz.

[0016] In an optional embodiment, the air purification device further includes a second concentration detection unit, disposed between the chemical coagulation module and the acoustic coagulation module, adapted to detect particle concentration information in the air flowing into the second coagulation chamber. The second concentration detection unit can be used to control the acoustic coagulation module's acoustic power based on the particle concentration information fed back by the second concentration detection unit, thereby ensuring sufficient coagulation of fine pollutant particles.

[0017] In an optional embodiment, the air purification device further includes a particle separation module, which is arranged at the air outlet end of the acoustic wave condensation module, and the particle separation module is suitable for separating particles in the air discharged from the air outlet end of the acoustic wave condensation module.

[0018] In an optional embodiment, the air purification device also includes a particulate matter processing module, which has an inlet and a processing chamber connected to the outlet of the particulate matter separation module. The processing chamber contains a sterilization solution, and the particulate matter separated by the particulate matter separation module enters the processing chamber for sterilization and disinfection.

[0019] In an optional embodiment, the air purification device further includes a silencer module, which includes sound insulation cotton blocked between the sound wave condensation module and the air outlet, and a plurality of air passages are spaced apart on the sound insulation cotton. The silencer module further includes a plurality of open-hole sound-absorbing cottons, and the plurality of open-hole sound-absorbing cottons are embedded in the plurality of air passages one by one.

[0020] In an optional embodiment, the open-hole sound-absorbing cotton is spherical, and a accommodating cavity matching the shape and size of the open-hole sound-absorbing cotton is provided in the air passage. The open-hole sound-absorbing cotton is embedded in the accommodating cavity, and the open-hole sound-absorbing cotton is provided with an air passage hole whose axis is parallel to the axis of the air passage.

[0021] In an optional embodiment, the air purification device also includes a fan module, the fan module includes a fan cavity and a fan arranged in the fan cavity, the air inlet end of the fan cavity is connected to the air outlet end of the acoustic wave condensation module, the air outlet end of the fan cavity is connected to the air outlet, and the silencer module is arranged in the fan cavity and located between the fan and the air outlet.

[0022] In the second aspect, the present invention also provides a control method for an air purification device as described in any of the above embodiments, the control method comprising: receiving a start signal of the air purification device; controlling the coagulant injection unit to start, injecting coagulant into the first agglomeration chamber to promote the agglomeration of particulate matter in the air entering the first agglomeration chamber; controlling the sound wave generating unit to start, generating sound waves to promote the re-agglomeration of particulate matter in the air entering the second agglomeration chamber from the first agglomeration chamber.

[0023] In an optional embodiment, the control of the coagulant injection unit to start and inject coagulant into the first aggregation chamber to promote agglomeration of particulate matter in the air entering the first aggregation chamber specifically includes: obtaining first concentration information of particulate matter in the air entering the first aggregation chamber, and judging whether the first concentration information is greater than or equal to a first concentration threshold: if so, controlling the coagulant injection unit to inject coagulant into the first aggregation chamber with a first injection amount; if not, controlling the coagulant injection unit to inject coagulant into the first aggregation chamber with a second injection amount, wherein the first injection amount is greater than the second injection amount.

[0024] In an optional embodiment, the control sound wave generating unit is started to generate sound waves to cause the particulate matter in the air entering the second merging chamber from the first merging chamber to agglomerate again, specifically including: obtaining second concentration information of the particulate matter in the air entering the second merging chamber, and judging whether the second concentration information is greater than or equal to a second concentration threshold: if so, controlling the sound wave generating unit to generate sound waves of a first sound wave frequency and a first sound pressure level; if not, controlling the sound wave generating unit to generate sound waves of a second sound wave frequency and a second sound pressure level, wherein the first sound wave frequency is greater than the second sound wave frequency, and the first sound pressure level is greater than the second sound pressure level.

[0025] The present invention has the following advantages:

[0026] The air purification device provided by the present invention utilizes a chemical condensation module and an acoustic condensation module to couple to achieve a combination of chemical condensation and mechanical condensation to efficiently remove particulate pollutants with smaller particle sizes in the air. First, the adhesion performance between the particulate pollutants is improved by a chemical condensation method, so that the fine particles in the air entering the first condensation chamber can adhere and agglomerate together under the action of a coagulant, thereby increasing the particle size of the particles. Then, the acoustic wave generating unit generates sound waves to accelerate the collision between the particles, which not only enables the particulate pollutants entering the second condensation chamber to fully combine with the coagulant, ensuring that the fine particle pollutants can be fully condensed, but also the sound waves generated by the acoustic wave generating unit can cause the air in the second condensation chamber to vibrate, drive the particles to vibrate and collide, the larger the particle pollutants are, the smaller the amplitude of the gas vibration is, and the smaller the particle pollutants are, the larger the amplitude of the gas vibration is. Due to the same-direction agglomeration effect of the sound field, the large-particle-size particle pollutants promote the agglomeration and growth of small-particle-size particles, thereby increasing the probability of collision between the particles, and the particle size of the particles passing through the acoustic wave condensation module will be further increased. In addition, due to the fluid dynamics effect between the particulate pollutants in the sound field, and the distance of the fluid dynamics force is larger than the distance of the same-direction agglomeration effect, particles of the same or similar particle size can be agglomerated with each other, thereby significantly increasing the particle size of most particulate pollutants, facilitating the subsequent separation of particulate pollutants, thereby achieving efficient removal of fine particulate pollutants in the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of an implementation scheme of an air purification device in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of the middle sound insulation module;

[0030] Figure 3 is a top view of the diversion unit in an embodiment of the present invention;

[0031] Figure 4 A flow chart of an implementation method of a control method for an air purification device according to an embodiment of the present invention;

[0032] Figure 5 A flow chart of another embodiment of a control method for an air purification device according to an embodiment of the present invention;

[0033] Figure 6 This is a flow chart of another embodiment of the control method for an air purification device according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 10. Chemical coagulation module; 11. First coalescence chamber; 12. Coagulant injection unit; 13. Diversion unit; 131. Diversion plate; 132. Diversion channel;

[0036] 20. Acoustic wave coagulation module; 21. Second coagulation chamber; 22. Acoustic wave generating unit;

[0037] 30. Primary filter unit;

[0038] 40. A first concentration detection unit;

[0039] 50. Second concentration detection unit;

[0040] 60. Particle separation module; 61. Separation pipeline;

[0041] 70. Particle treatment module;

[0042] 80. Silencing module; 81. Sound insulation cotton; 811. Air passage; 82. Open-hole sound-absorbing cotton; 821. Air passage;

[0043] 90. Fan module; 91. Fan cavity; 92. Fan.

[0044] 100. Housing; 101. Air inlet; 102. Air outlet. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0046] At present, air purification devices mainly rely on electrostatic devices or filtering devices made of HEPA high-efficiency filters to remove small particles. When using an electrostatic device to remove particulate pollutants in the air, its purification efficiency for tiny particles is low, and its purification efficiency will also decrease with the continuous accumulation of suspended particulates. The dust collecting plate of the electrostatic device needs to be cleaned frequently to restore its purification efficiency. When using a filtering device to remove particulate pollutants in the air, after the pollutants on the surface of the filter reach saturation, its filtration efficiency will also decrease. Therefore, the filter needs to be replaced in time to ensure the purification efficiency. When filtering particulate pollutants in the air through electrostatic devices and filtering devices, the pollutants will be enriched on the surface of the dust collecting plate or the filter, which requires regular maintenance or replacement, and the maintenance cost is high. Therefore, in order to avoid the above problems, relevant technical personnel use a merging method to achieve the purification of fine particulate pollutants.

[0047] It should be explained that aggregation is a stable collision behavior that is expected in many application technologies, such as viscous sintering, spray cooling, and emerging microfluidics and nanofluidics technologies. Most of the relevant technicians use chemical aggregation or acoustic aggregation to achieve the purification of fine particle pollutants. However, chemical aggregation can improve the adhesion between particles, but it is difficult to ensure that the coagulant and the particulate pollutants, as well as the particulate pollutants can be fully combined. Increasing the particle size of particulate pollutants and then purifying particulate pollutants by acoustic aggregation requires higher frequency and acoustic wave conditions, and will also produce higher noise hazards, which need to be eliminated. Therefore, the above-mentioned aggregation methods have certain disadvantages when used alone, and the agglomeration effect on fine particle pollutants is not very obvious.

[0048] The following combination Figures 1 to 6 , describing embodiments of the present invention.

[0049] According to an embodiment of the present invention, on one hand, the present invention provides an air purification device, including a housing 100 , a chemical condensation module 10 , and an acoustic condensation module 20 .

[0050] Specifically, the housing 100 is provided with an air inlet 101 and an air outlet 102. The chemical coagulation module 10 is provided in the housing 100, and the chemical coagulation module 10 includes a first agglomeration chamber 11 whose air inlet end is connected to the air inlet 101, and a coagulant injection unit 12 provided in the first agglomeration chamber 11. The coagulant injection unit 12 is suitable for injecting a coagulant into the first agglomeration chamber 11 to promote the agglomeration of particles in the air entering the first agglomeration chamber 11. The acoustic wave coagulation module 20 is provided in the housing 100, and the acoustic wave coagulation module 20 includes a second agglomeration chamber 21 provided between the first agglomeration chamber 11 and the air outlet 102, and a sound wave generating unit 22 provided in the second agglomeration chamber 21. The sound wave generating unit 22 is suitable for generating sound waves to promote the reagglomeration of particles in the air entering the second agglomeration chamber 21 from the first agglomeration chamber 11.

[0051] The air purification device provided in the above embodiment utilizes a coupling between a chemical condensation module 10 and an acoustic condensation module 20 to achieve efficient removal of smaller particulate pollutants from the air through a combination of chemical condensation and mechanical condensation. First, the chemical condensation module 10 can increase the particle size of fine particulate pollutants in the air. Then, the acoustic condensation module 20 can drive the particles to vibrate and collide with each other, ensuring that the fine particulate pollutants can fully condense, further increasing the particle size and facilitating the subsequent separation of the particulate pollutants, thereby improving the purification efficiency of fine particulate matter.

[0052] In this embodiment, the adhesion performance between the particle pollutants is improved by a chemical aggregation method, so that the fine particles in the air entering the first aggregation chamber 11 can adhere and agglomerate together under the action of the coagulant, thereby increasing the particle size of the particles. Then, the sound wave generating unit 22 generates sound waves to accelerate the collision between the particles. Not only can the particle pollutants entering the second aggregation chamber 21 be fully combined with the coagulant, ensuring that the fine particle pollutants can be fully agglomerated, but the sound waves generated by the sound wave generating unit 22 can also cause the air in the second aggregation chamber 21 to vibrate, driving the particles to vibrate and collide. The larger the particle pollutants, the smaller the amplitude of the gas vibration, and the smaller the particle pollutants, the larger the amplitude of the gas vibration. Due to the unidirectional agglomeration effect of the sound field, the large-sized particle pollutants promote the agglomeration and growth of the small-sized particles, thereby increasing the probability of collision between the particles. The particle size of the particles passing through the acoustic wave agglomeration module 20 will be further increased.

[0053] In addition, due to the fluid dynamics effect between the particulate pollutants in the sound field, and the distance of the fluid dynamics force is larger than the distance of the same-direction agglomeration effect, particles of the same or similar particle size can be agglomerated with each other, thereby significantly increasing the particle size of most particulate pollutants, facilitating the subsequent separation of particulate pollutants, and thus achieving efficient removal of fine particulate pollutants in the air.

[0054] The following combination Figure 1 、 Figure 3 , the specific structure of the chemical coagulation module 10, as well as the specific distribution mode, assembly relationship, working process, etc. of each structure are elaborated in detail.

[0055] In this embodiment, the chemical coagulation module 10 further includes a plurality of diverter units 13, which are arranged at intervals along the gas flow direction within the first coalescing chamber 11. The diverter units 13 include a diverter plate 131 and a plurality of diverter channels 132 spaced apart from each other on the diverter plate 131. The diverter channels 132 on two adjacent diverter plates 131 are staggered.

[0056] In the above embodiment, the multiple diversion units 13 are provided to effectively divert the air entering the first concentrating chamber 11, allowing particulate matter in the air to be evenly dispersed throughout the first concentrating chamber 11, thereby improving the purification effect of particulate matter. In addition, the diversion channels 132 on two adjacent diversion plates 131 in this application are staggered, which further increases the probability of collision between particles.

[0057] Furthermore, the cross-sectional shape and size of the diverter plate 131 match the inner circumferential shape and size of the first merging chamber 11 , and the diverter plate 131 can be fixed in the first merging chamber 11 by screws or snap connections, which is convenient for assembly and disassembly.

[0058] Optionally, the distance between two adjacent diversion units 13 is 10 mm, and there are a plurality of diversion channels 132 on the diversion plate 131 of each layer, and the diversion channels 132 are in the shape of circular holes.

[0059] It should be noted that the diverter plate 131 in this embodiment is made of a material that blocks the passage of pollutants, such as injection molding materials such as ABS and PLA.

[0060] In an optional embodiment, along the gas flow direction, the coagulant injection unit 12 is arranged across the first merging chamber 11, and the coagulant injection unit 12 divides the first merging chamber 11 into a first space and a second space that are interconnected; wherein, the first space is connected to the air inlet 101, and the second space is connected to the second merging chamber 21, and the aperture d1 of the diversion channel 132 of the diversion unit 13 located in the first space is smaller than the aperture d2 of the diversion channel 132 of the diversion unit 13 located in the second space.

[0061] In the above embodiment, since some particulate matter adheres to the highly viscous cloud-like coagulant and then adheres to the nearby particulate matter, thereby increasing the particle size of the particulate matter, the diversion channel 132 of the second space located at the outlet gradually increases, preventing the diversion channel 132 located at the outlet from being partially blocked due to the larger particle size of the particulate matter agglomeration.

[0062] In an optional embodiment, the distance between two adjacent diversion channels 132 on the same diversion plate 131 is between 5 mm and 8 mm.

[0063] Preferably, the hole spacing between two adjacent diversion channels 132 on the diversion plate 131 located in the first space is 5mm-6mm, and the hole spacing between two adjacent diversion channels 132 on the diversion plate 131 located in the second space is 6mm-8mm, so as to prevent the diversion channels 132 located in the second space from being partially blocked due to the larger particle size of the particles agglomerated.

[0064] In an optional embodiment, d1 is between 2 mm and 4 mm, and d2 is between 4 mm and 6 mm.

[0065] In an optional embodiment, the first merging chamber 11 has a merging chamber shell that is convex in the middle and gradually shrinks toward both ends, and the coagulant injection unit 12 is disposed in the middle position of the merging chamber shell. That is, the cross-sectional area of ​​the merging chamber shell gradually increases from the air inlet end to the middle portion, and gradually decreases from the middle portion to the air outlet end. By adopting the above-mentioned shape design, the merging chamber shell allows the air to be dispersed and diffused throughout the entire first condensation chamber when entering the merging chamber shell, thereby increasing the contact rate between the pollutants and the chemical coagulant. When the air leaves the merging chamber shell, the collision probability of the particle pollutants can be increased, thereby increasing the binding rate between the particle pollutants, further increasing the particle size, and facilitating the subsequent separation of the particle pollutants.

[0066] Specifically, the coagulant injection unit 12 divides the coalescing chamber housing into two upper and lower sections, with the upper section forming the second space and the lower section forming the first space. The coalescing chamber housing is constructed by joining two frustum-shaped shells, with the large-diameter ends of the two frustums facing each other. The small-diameter end of the lower frustum communicates with the air inlet 101, while the small-diameter end of the upper frustum communicates with the air inlet of the acoustic coalescing module 20. The coagulant injection unit 12 is located at the junction between the two frustum-shaped shells.

[0067] In an optional embodiment, the coagulant injection unit 12 includes a plurality of nozzles connected in series through a pipeline, and the nozzles are suitable for spraying the coagulant in the form of a mist into the first agglomeration chamber 11. The nozzles are provided with a plurality of fine nozzle holes. In this embodiment, the angle at which the nozzles spray the coagulant is horizontal and all around, so as to cover all particulate pollutants as much as possible. The mist cloud with a certain diffusion angle and a high surface adhesion activity sprayed by the nozzles is adsorbed on the surface of fine particulate pollutants and some coarse particulate pollutants, and the fine particles form larger agglomerates. Some coarse particulate pollutants also adsorb fine pollutants to form larger agglomerates.

[0068] It should be noted that the coagulant in this embodiment can be a mixed aqueous solution composed of an inorganic ammonium salt and a polyacrylamide flocculant.

[0069] In an optional embodiment, the air purification device further includes a primary filter unit 30, which is disposed between the air inlet 101 and the chemical condensation module 10 and is configured to perform preliminary filtration of particulate matter in the air. The primary filter unit 30 can initially filter out hair and large particles of pollutants in the air. The air, having been preliminarily purified by the primary filter unit 30, then enters the chemical condensation module 10.

[0070] Specifically, the primary filter unit 30 is a primary filter screen, and the frustum-shaped small-diameter port below the merging chamber shell continues to extend downward to form a connecting cylinder, and the primary filter unit 30 is detachably installed and fixed in the connecting cylinder.

[0071] In an optional embodiment, the air purification device further includes a first concentration detection unit 40, which is disposed between the primary filtration unit 30 and the chemical coagulation module 10 and is adapted to detect particle concentration information in the air flowing into the first coalescing chamber 11. The provision of the first concentration detection unit 40 enables precise control of the injection amount of the coagulant based on the particle concentration information in the air flowing into the first coalescing chamber 11, thereby improving the purification efficiency of fine particles.

[0072] The following combination Figure 1 The specific structure of the acoustic wave condensation module 20, as well as the specific distribution mode, assembly relationship, working process, etc. of each structure are described in detail.

[0073] In an optional embodiment, the sound wave generating unit 22 includes a plurality of sound wave generators spaced apart in the second combining chamber 21 .

[0074] Specifically, the second converging chamber 21 comprises a cylindrical peripheral wall and upper and lower end walls disposed at the upper and lower ends of the cylindrical peripheral wall. An air inlet is located in the center of the lower end wall, which is connected to the air outlet of the first converging chamber 11 via a pipe. Sound wave generators are evenly spaced along the inner wall of the cylindrical second converging chamber 21. Sound wave generators are spaced apart on the cylindrical peripheral wall and the upper and lower end walls, ensuring uniform sound wave distribution within the second converging chamber 21.

[0075] In an optional embodiment, the sound wave generating unit 22 is suitable for generating sound waves of 1000 Hz-3000 Hz.

[0076] In an optional embodiment, the air purification device further includes a second concentration detection unit 50, which is disposed between the chemical condensation module 10 and the acoustic condensation module 20 and is adapted to detect particle concentration information in the air flowing into the second condensation chamber 21. The second concentration detection unit 50 can be used to control the acoustic power of the acoustic condensation module 20 based on the particle concentration information fed back by the second concentration detection unit 50, thereby ensuring that fine particle pollutants can be fully condensed.

[0077] It should be noted that, in this embodiment, the first concentration detection unit 40 and the second concentration detection unit 50 are both dust concentration sensors.

[0078] The larger particles that pass through the chemical condensation module 10 enter the acoustic condensation module 20. The shell of the second condensation chamber 21 is cylindrical as a whole. Several acoustic wave generators are evenly distributed on the inner wall of the second condensation chamber 21 to generate low-frequency sound waves (1000Hz-3000Hz). The sound wave frequency will change with the concentration detected by the dust concentration sensor. If the dust concentration is high, the acoustic wave generator will generate higher-frequency sound waves to accelerate the collision between the particles. The sound waves generated by the acoustic wave generator cause the gas in the second condensation chamber 21 to vibrate, driving the vibration between the particles. The larger the particle pollutants, the smaller the amplitude of the gas vibration, and the smaller the particle pollutants, the larger the amplitude of the gas vibration. Due to the unidirectional agglomeration effect of the sound field, large-sized particle pollutants promote the agglomeration and growth of small-sized particles, thereby increasing the probability of collision between particles. The particle size of the particles passing through the acoustic condensation module 20 will further increase. There is a fluid dynamic effect between the particulate pollutants in the sound field, and the distance of the fluid dynamic force is larger than the distance of the same-direction agglomeration effect, which can cause particles of the same or similar particle size to agglomerate with each other. At this time, the particle size of most particulate pollutants is significantly increased.

[0079] In an optional embodiment, the air purification device further includes a particle separation module 60 , which is disposed at the air outlet of the acoustic wave condensation module 20 . The particle separation module 60 is suitable for separating particles in the air discharged from the air outlet of the acoustic wave condensation module 20 .

[0080] It should be noted that, in this embodiment, the particle separation module 60 is similar to a molecular sieve structure and can separate particulate pollutants with a particle size greater than 3 nm (all except volatile substances can be separated).

[0081] In an optional embodiment, the air purification device also includes a particulate matter processing module 70, which has a processing chamber whose inlet is connected to the outlet of the particulate matter separation module 60, and a sterilization solution is contained in the processing chamber. The particulate matter separated by the particulate matter separation module 60 enters the processing chamber for sterilization and disinfection.

[0082] Specifically, the particle separation module 60 and the particle treatment module 70 are connected via a particle separation conduit 61. Most of the particulate pollutants agglomerated by the acoustic agglomeration module 20 in the particle treatment module 70 have their particle size significantly increased, entering the particle separation module 60 to separate out the larger particles. The separated larger particles can then flow through the particle separation conduit 61 into the particle treatment module 70, where a mixed solution of 2%-4% sodium hydroxide solution and 10% sodium chloride is contained within the treatment chamber. This solution kills the vegetative bodies of viruses and bacteria, preventing secondary transmission of these bacteria and viruses.

[0083] Furthermore, an air outlet is provided in the middle of the upper end wall of the second merging chamber 21 , the particle separation module 60 is arranged at the air outlet, the particle treatment module 70 is located below the particle separation module 60 , and the particle treatment module 70 is located in the second merging chamber 21 .

[0084] Conventional air purifiers in automatic mode produce noise levels that meet the noise threshold. However, the air purifier provided in this embodiment generates a certain amount of noise due to the low-frequency sound waves emitted by the acoustic condensation module 20. This is especially true when dust concentration is high, as the acoustic condensation module 20 emits higher frequencies. As air volume increases, the noise level also increases, impacting the user experience. Therefore, it is necessary to add a silencer module 80 after the acoustic condensation module 20 to reduce the noise.

[0085] The following combination Figure 1 、 Figure 2 The specific structure of the silencer module 80, as well as the specific distribution mode, assembly relationship, working process, etc. of each structure are described in detail.

[0086] Specifically, the air purification device further includes a silencer module 80, which includes a sound insulation cotton 81 sealed between the acoustic wave condensation module 20 and the air outlet 102. The sound insulation cotton 81 is provided with a plurality of air passages 811 spaced apart. The silencer module 80 also includes a plurality of open-hole sound-absorbing cottons 82, which are embedded in the plurality of air passages 811 in a one-to-one correspondence. By installing the silencer module 80 at the top of the air purification device, the noise generated by the acoustic wave condensation module 20 and the fan 92 is isolated, so that the noise output value of the air purification device meets the standard and improves the user experience.

[0087] In an optional embodiment, in this example, the sound-absorbing module 80 is composed of sound-insulating cotton 81 and perforated sound-absorbing cotton 82. The perforated sound-absorbing cotton 82 is spherical in shape and embedded in the sound-insulating cotton 81. The perforated sound-absorbing cotton 82 is vertically positioned. The perforated sound-absorbing cotton 82 is spherical in shape. A receiving cavity matching the shape and size of the perforated sound-absorbing cotton 82 is provided in the air passage 811. The perforated sound-absorbing cotton 82 is embedded in the receiving cavity. The perforated sound-absorbing cotton 82 is provided with a wind through hole 821 whose axis is parallel to the axis of the air passage 811.

[0088] In an optional embodiment, a plurality of air passages 811 are arranged on the sound insulation cotton 81 in a staggered manner horizontally and vertically, the cross-sectional direction of the sound insulation cotton 81 is perpendicular to the airflow direction, and a plurality of rows of air passages 811 are evenly spaced along the cross-sectional direction on the sound insulation cotton 81. Each row of air passages 811 includes a plurality of air passages 811 evenly spaced, and any three adjacent air passages 811 in two adjacent rows of air passages 811 are arranged in an equilateral triangle.

[0089] By adopting this design, any three adjacent open-hole sound-absorbing cotton pads 82 in two adjacent rows form an equilateral triangle arrangement. That is, the open-hole sound-absorbing cotton pads 82 in two adjacent rows are staggered and interspersed. This equilateral triangle arrangement allows for a compact arrangement of the open-hole sound-absorbing cotton pads 82, maximizing the number of open-hole sound-absorbing cotton pads 82 within the same area, thereby achieving maximum sound attenuation. The combined effect of the sound insulation pads 81 and the open-hole sound-absorbing cotton pads 82 minimizes noise while ensuring adequate airflow, significantly reducing the user experience caused by noise and improving the user experience.

[0090] In an optional embodiment, as Figure 1 As shown, the air purification device also includes a fan module 90, which includes a fan cavity 91 and a fan 92 arranged in the fan cavity 91, the air inlet end of the fan cavity 91 is connected to the air outlet end of the acoustic wave condensation module 20, and the air outlet end of the fan cavity 91 is connected to the air outlet 102, and the silencer module 80 is arranged in the fan cavity 91 and is located between the fan 92 and the air outlet 102. Setting the silencer module 80 between the fan 92 and the air outlet 102 can not only reduce the noise from the acoustic wave condensation module 20, but also reduce the sound emitted by the fan 92. By setting the silencer module 80 at the upper end of the fan 92, the noise generated by the acoustic wave condensation module 20 and the sound emitted by the fan 92 can be eliminated, thereby improving the user experience.

[0091] This embodiment utilizes a coupled agglomeration device to increase the size of small molecular particles in the air within the device, thereby enabling better separation of these particles. The acoustic wave generator in the acoustic wave agglomeration module 20 controls power based on dust concentration, ensuring adequate agglomeration of particles. A silencer module 80, located at the top of the air purifier, isolates the noise generated by the acoustic wave agglomeration module 20 and fan 92, ensuring that the purifier's noise output meets standards.

[0092] According to an embodiment of the present invention, Figure 1 and Figure 4 As shown, on the other hand, the present invention also provides a control method for an air purification device as in any of the above embodiments, the control method comprising the following steps:

[0093] Step S101: receiving an air purification device start signal;

[0094] Step S102: controlling the coagulant injection unit 12 to start and injecting the coagulant into the first coalescing chamber 11 to promote agglomeration of the particles in the air entering the first coalescing chamber 11;

[0095] Step S103: Control the sound wave generating unit 22 to start, generating sound waves to promote the particles in the air entering the second agglomerating chamber 21 from the first agglomerating chamber 11 to agglomerate again.

[0096] In order to increase the particle size of the pollutants as much as possible, the present embodiment uses both the acoustic coagulation module 20 and the chemical coagulation module 10 for better results.

[0097] In an optional embodiment, combined with Figure 1 and Figure 4 、 Figure 5 As shown, the coagulant injection unit 12 is controlled to start and inject the coagulant into the first coalescing chamber 11 to promote the agglomeration of the particles in the air entering the first coalescing chamber 11. That is, step S102 specifically includes:

[0098] Obtain first concentration information of particulate matter in the air entering the first merging chamber 11, and determine whether the first concentration information is greater than or equal to a first concentration threshold:

[0099] If yes, the coagulant injection unit 12 is controlled to inject the coagulant into the first coalescing chamber 11 at a first injection amount; if no, the coagulant injection unit 12 is controlled to inject the coagulant into the first coalescing chamber 11 at a second injection amount, wherein the first injection amount is greater than the second injection amount.

[0100] By controlling the injection amount of the coagulant injection unit 12 according to the first concentration information detected by the first concentration detection unit 40 , the coagulation effect on fine particulate matter can be effectively ensured while avoiding waste of resources.

[0101] In one embodiment, the first concentration threshold is 20 mg / cm 3 , the first injection volume is 30mL / h, and the second injection volume is 20mL / h. If the first concentration information is greater than or equal to 20mg / cm 3 , the coagulant injection unit 12 is controlled to inject the coagulant into the first coalescence chamber 11 at an injection rate of 30 mL / h; if the first concentration information is judged to be less than 20 mg / cm 3 , the coagulant injection unit 12 is controlled to inject the coagulant into the first coalescing chamber 11 at an injection rate of 20 mL / h.

[0102] In an optional embodiment, combined with Figure 1 and Figure 4 、 Figure 6 As shown, the sound wave generating unit 22 is controlled to start and generate sound waves to promote the reagglomeration of particles in the air entering the second agglomerating chamber 21 from the first agglomerating chamber 11, that is, step S103 specifically includes:

[0103] Obtain second concentration information of particulate matter in the air entering the second merging chamber 21, and determine whether the second concentration information is greater than or equal to a second concentration threshold:

[0104] If so, the sound wave generating unit 22 is controlled to generate sound waves of a first sound wave frequency and a first sound pressure level; if not, the sound wave generating unit 22 is controlled to generate sound waves of a second sound wave frequency and a second sound pressure level, wherein the first sound wave frequency is greater than the second sound wave frequency, and the first sound pressure level is greater than the second sound pressure level.

[0105] This embodiment utilizes a coupled coalescing device formed by combining a chemical coagulation module 10 and an acoustic coagulation module 20 to increase the particle size of fine particulate pollutants in the air, thereby improving the efficiency of fine particulate matter purification. The acoustic coagulation module 20 controls the acoustic power based on data fed back by the second concentration detection unit 50 to ensure sufficient coalescence of fine particulate pollutants.

[0106] In one embodiment, the first concentration threshold is 20 mg / cm 3 , the first sound wave frequency is 2.5kHz, the first sound pressure level is 200dB; the second sound wave frequency is 1.5kHz, the first sound pressure level is 120dB. If the second concentration information is greater than or equal to 20mg / cm 3, then the sound wave generating unit 22 is controlled to generate a sound wave with a frequency of 2.5kHz and a sound pressure level of 200dB; if the second concentration information is judged to be less than 20mg / cm 3 , the sound wave generating unit 22 is controlled to generate a sound wave with a frequency of 1.5kHz and a sound pressure level of 120dB.

[0107] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An air purification device, characterized in that: include: The housing (100) is provided with an air inlet (101) and an air outlet (102); A chemical coagulation module (10) is arranged in a housing (100), the chemical coagulation module (10) comprising a first agglomeration chamber (11) whose air inlet end is connected to the air inlet (101) and a coagulant injection unit (12) arranged in the first agglomeration chamber (11), the coagulant injection unit (12) being suitable for injecting a coagulant into the first agglomeration chamber (11) to promote agglomeration of particles in the air entering the first agglomeration chamber (11); The acoustic wave condensation module (20) comprises a second condensation chamber (21) arranged between the first condensation chamber (11) and the air outlet (102), and an acoustic wave generating unit (22) arranged in the second condensation chamber (21), wherein the acoustic wave generating unit (22) is suitable for generating acoustic waves to promote the reagglomeration of particles in the air entering the second condensation chamber (21) from the first condensation chamber (11); The chemical coagulation module (10) further comprises: A plurality of diversion units (13) are arranged at intervals in the first merging chamber (11) along the gas flow direction, the diversion units (13) comprising a diversion plate (131) and a plurality of diversion channels (132) spaced apart and arranged on the diversion plate (131), and along the gas flow direction, the diversion channels (132) on two adjacent diversion plates (131) are staggered with each other.

2. The air purification device according to claim 1, characterized in that Along the gas flow direction, the coagulant injection unit (12) is arranged across the first coalescing chamber (11), and the coagulant injection unit (12) divides the first coalescing chamber (11) into a first space and a second space that are interconnected; The first space is connected to the air inlet (101), the second space is connected to the second merging chamber (21), and the aperture d1 of the diversion channel (132) of the diversion unit (13) located in the first space is smaller than the aperture d2 of the diversion channel (132) of the diversion unit (13) located in the second space.

3. The air purification device according to claim 2, characterized in that The distance between two adjacent diversion channels (132) on the same diversion plate (131) is between 5 mm and 8 mm; And / or, d1 is between 2mm and 4mm, and d2 is between 4mm and 6mm.

4. The air purification device according to any one of claims 1 to 3, characterized in that: The first coalescing chamber (11) has a coalescing chamber shell that is convex in the middle and gradually shrinks towards both ends, and the coagulant injection unit (12) is arranged in the middle position of the coalescing chamber shell; And / or, the coagulant injection unit (12) comprises a plurality of nozzles connected in series through pipelines, and the nozzles are suitable for spraying the coagulant into the first coalescing chamber (11) in a mist form.

5. The air purification device according to any one of claims 1 to 3, characterized in that: The air purification device also includes: A primary filter unit (30) is provided between the air inlet (101) and the chemical condensation module (10) and is used for performing preliminary filtration on particulate matter in the air; The first concentration detection unit (40) is arranged between the primary filter unit (30) and the chemical condensation module (10), and is suitable for detecting particle concentration information in the air flowing into the first coalescence chamber (11).

6. The air purification device according to any one of claims 1 to 3, characterized in that: The sound wave generating unit (22) includes a plurality of sound wave generators arranged at intervals in the second merging chamber (21); And / or, the sound wave generating unit (22) is suitable for generating sound waves of 1000 Hz-3000 Hz.

7. The air purification device according to any one of claims 1 to 3, characterized in that: The air purification device also includes: The second concentration detection unit (50) is arranged between the chemical condensation module (10) and the acoustic condensation module (20), and is suitable for detecting particle concentration information in the air flowing into the second condensation chamber (21).

8. The air purification device according to any one of claims 1 to 3, characterized in that: The air purification device also includes: a particle separation module (60) disposed at the air outlet of the acoustic wave condensation module (20), the particle separation module (60) being suitable for separating particles in the air discharged from the air outlet of the acoustic wave condensation module (20); The particle processing module (70) has a processing chamber whose inlet is connected to the outlet of the particle separation module (60), wherein a sterilizing solution is contained in the processing chamber, and the particles separated by the particle separation module (60) enter the processing chamber for sterilization and disinfection.

9. The air purification device according to any one of claims 1 to 3, characterized in that: The air purification device also includes: The silencer module (80) includes a sound insulation cotton (81) that is sealed between the sound wave condensation module (20) and the air outlet (102), and a plurality of air passages (811) are spaced apart on the sound insulation cotton (81). The silencer module (80) also includes a plurality of open-hole sound-absorbing cottons (82), and the plurality of open-hole sound-absorbing cottons (82) are embedded in the plurality of air passages (811) in a one-to-one correspondence.

10. The air purification device according to claim 9, characterized in that: The perforated sound-absorbing cotton (82) is spherical, and a receiving cavity having a shape and size matching that of the perforated sound-absorbing cotton (82) is provided in the air passage (811). The perforated sound-absorbing cotton (82) is embedded in the receiving cavity, and a wind through hole (821) having an axis parallel to the axis of the air passage (811) is provided in the perforated sound-absorbing cotton (82).

11. The air purification device according to claim 9, characterized in that: The air purification device also includes: The fan module (90) comprises a fan cavity (91) and a fan (92) arranged in the fan cavity (91), the air inlet end of the fan cavity (91) is connected to the air outlet end of the acoustic wave condensation module (20), the air outlet end of the fan cavity (91) is connected to the air outlet (102), and the silencer module (80) is arranged in the fan cavity (91) and located between the fan (92) and the air outlet (102).

12. A control method for an air purification device according to any one of claims 1 to 11, characterized in that: The control method includes: Receive an air purification device start-up signal; Controlling the coagulant injection unit (12) to start, injecting the coagulant into the first agglomeration chamber (11) to promote agglomeration of particles in the air entering the first agglomeration chamber (11); The sound wave generating unit (22) is controlled to start and generate sound waves to cause the particles in the air entering the second agglomerating chamber (21) from the first agglomerating chamber (11) to agglomerate again.

13. The control method of the air purification device according to claim 12, characterized in that: The control of the coagulant injection unit (12) to start up and inject the coagulant into the first agglomeration chamber (11) to promote agglomeration of particles in the air entering the first agglomeration chamber (11) specifically includes: Acquire first concentration information of particulate matter in the air entering the first merging chamber (11), and determine whether the first concentration information is greater than or equal to a first concentration threshold: If yes, the coagulant injection unit (12) is controlled to inject the coagulant into the first merging chamber (11) at a first injection amount; if no, the coagulant injection unit (12) is controlled to inject the coagulant into the first merging chamber (11) at a second injection amount, wherein the first injection amount is greater than the second injection amount.

14. The control method of the air purification device according to claim 12, characterized in that: The control sound wave generating unit (22) is started to generate sound waves to promote the reagglomeration of particles in the air entering the second agglomerating chamber (21) from the first agglomerating chamber (11), specifically comprising: Acquire second concentration information of particulate matter in the air entering the second merging chamber (21), and determine whether the second concentration information is greater than or equal to a second concentration threshold: If so, the sound wave generating unit (22) is controlled to generate a sound wave of a first sound wave frequency and a first sound pressure level; if not, the sound wave generating unit (22) is controlled to generate a sound wave of a second sound wave frequency and a second sound pressure level, wherein the first sound wave frequency is greater than the second sound wave frequency, and the first sound pressure level is greater than the second sound pressure level.

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