CN110871000A - Ultrasonic environment purifier - Google Patents
Ultrasonic environment purifier Download PDFInfo
- Publication number
- CN110871000A CN110871000A CN201811012262.4A CN201811012262A CN110871000A CN 110871000 A CN110871000 A CN 110871000A CN 201811012262 A CN201811012262 A CN 201811012262A CN 110871000 A CN110871000 A CN 110871000A
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- China
- Prior art keywords
- filter screen
- screen plate
- ultrasonic
- air
- water
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
- B01D46/762—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations involving sonic or ultrasonic waves
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to an ultrasonic environment purifier, which comprises a machine shell, at least one filter screen plate and an ultrasonic transducer, wherein the machine shell is provided with a purifying chamber, the two ends of the machine shell are respectively provided with an air inlet and an air outlet, each filter screen plate is respectively and vertically arranged in the purifying chamber in sequence, and the side edge of each filter screen plate is also respectively provided with the ultrasonic transducer so that each filter screen plate respectively generates ultrahigh frequency cutting oscillation filtering motion; a water curtain seam and a water inlet interface which are used for spraying a water curtain towards each filter screen plate are respectively arranged above each filter screen plate; the bottom of the machine shell is also provided with a drain hole. The air purifier has the advantages that the filter screen does not need to be replaced, the material consumption is zero, the filter screen has a self-cleaning function, the filter screen does not need to be cleaned and maintained, the air purifier can continuously run for a long time, the purification efficiency is high, the air purification cleanliness is good, the structure is simple, the realization is easy, reliable and durable, and the air purifier is suitable for air purification occasions of various environments.
Description
Technical Field
The invention relates to the field of purification equipment, in particular to environmental air purification equipment.
Background
Currently, the environmental air purification devices sold in the market can be roughly divided into two categories according to the different filtering modes: the first is an ambient air purifying machine which is provided with a plurality of stages of filter screens made of different materials and completely depends on the filter screens made of different materials to filter and purify air passing through the filter screens at all stages. The filter screens of the ambient air purifying machine in the mode have service life, after the filter screens at all levels are used for a certain time, more dust, foreign matters, PM2.5 and the like are arranged on the filter screens, the adsorption of the activated carbon is saturated, the brand new filter screens are required to be replaced regularly, users need to purchase new filter screens at all levels continuously, and the daily use cost and the maintenance cost are higher. The other is an environmental air purifying machine which utilizes static electricity to absorb dust and collect dust, and a user needs to dismount and mount the static electricity network and the dust collecting network at irregular time to wash and clean the environmental air purifying machine, and the environmental air purifying machine needs to be installed back into the machine after the environmental air purifying machine is cleaned and dried, and then the environmental air purifying machine can be used continuously. The main disadvantages of the environmental air purifying machine are: the filter screen is required to be cleaned by manual disassembly irregularly, and the filter screen can not be applied to an environment with inflammable air and high humidity, otherwise, static electricity easily causes fire or machine damage, and the applicability is poor.
Disclosure of Invention
The invention aims to solve the problems and the defects, and provides an ultrasonic environment purifier which does not need to replace a filter screen, has zero material consumption, has a self-cleaning function, does not need to clean and maintain the filter screen, can continuously operate for a long time, has high purification efficiency, good air purification cleanliness, simple structure, easy realization, reliability and durability, and is suitable for air purification occasions of various environments.
The technical scheme of the invention is realized as follows: an ultrasonic environment purifier is characterized by comprising a casing, at least one filter screen plate and an ultrasonic transducer, wherein the casing is provided with a purifying chamber, and both ends of the casing are respectively provided with an air inlet and an air outlet; the filter screen plates are vertically arranged in the purification chamber in sequence, and ultrasonic transducers are arranged on the side edges of the filter screen plates respectively so as to enable the filter screen plates to generate ultrahigh frequency cutting oscillation filtering motion; a water curtain seam and a water inlet interface which are used for spraying a water curtain towards each filter screen plate are respectively arranged above each filter screen plate; the bottom of the machine shell is also provided with a drain hole.
In order to make the water in the working and running process of the invention be capable of being repeatedly utilized so as to be beneficial to saving water resources, the invention also comprises a sedimentation and filtration tank, and the drain hole is connected with the sedimentation and filtration tank. Furthermore, the water inlet interface is connected with the sedimentation and filtration tank through a pipeline, and a water pump is connected in series on the pipeline between the water inlet interface and the sedimentation and filtration tank.
In order to prevent the purified air from being atomized and low in humidity, a dehumidifying condenser for water-gas separation is further arranged on the air outlet of the shell, a condensed water collector is further arranged at the bottom of the dehumidifying condenser, and the dehumidifying condenser is further connected with a dehumidifying host.
The invention has the beneficial effects that: by adopting the technical scheme, when the ultrasonic wave energy converter is used, the ultrasonic wave energy converter performs high-frequency oscillation on the filter screen plate, the water curtain seam sprays water curtain to the filter screen plate to wash, turbid air enters from the air inlet and sequentially passes through the filter screen plate under the high-frequency oscillation and water curtain washing, tens of millions of times of cutting and interception are generated by performing high-frequency oscillation on the passing air through the meshes of the filter screen plate, the water curtain washing and the immersion of atomized air generated by the high-frequency oscillation on the water, so that various impurities, odors and PM2.5P carried in the turbid air are intercepted and filtered, and fresh and clean air is discharged from the air outlet. In the invention, because the filter screen plate is subjected to high-frequency oscillation and water curtain washing by the ultrasonic transducer in the whole working process, dust, impurities and PM2.5 in the air intercepted by the filter screen are completely prevented from being adhered to the filter screen, and the filtered dust and impurities are taken out of the shell through water, so that the filter screen is completely cleaned without manpower, the filter screen and zero material consumption do not need to be replaced, the maintenance-free and self-cleaning effects are realized, the filter screen plate can be operated for a long time, the purification efficiency is high, and the air purification cleanliness is good. The equipment produced by the technical scheme of the invention can be widely applied to various scenes, such as air environment purification of factories, families, hotels, markets, construction sites, cruise ships, rail vehicles and other scenes.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the front side of the screen plate of the present invention.
Fig. 3 is a partially enlarged structural view of a portion indicated by a in fig. 1 according to the present invention.
Fig. 4 is a partially enlarged structural view of a portion indicated by B in fig. 1 according to the present invention.
Detailed Description
As shown in fig. 1, the ultrasonic environment purifier of the present invention comprises a casing 1, at least one filter screen plate, and an ultrasonic transducer 5, wherein the casing 1 is provided with a purifying chamber 11, an air inlet 12 and an air outlet 13 are respectively provided at two ends of the casing 1, and the air inlet 12 and the air outlet 13 are respectively communicated with the purifying chamber 11. In use, the air inlet 12 is typically connected to the outlet of a blower or source of the generation of the turbid air to filter and purify the turbid air.
As shown in fig. 1, each filter screen plate is vertically installed in the purification chamber 11 sequentially, and the side of each filter screen plate is further provided with an ultrasonic transducer 5, so that each filter screen plate generates the ultra-high frequency cutting oscillation filtering motion. The ultrasonic transducers 5 are arranged at any positions on the peripheral side edges of the frame of the filter screen plate, so long as the filter screen plate can be well oscillated, and the filter screen plate can generate better high-frequency oscillation.
As shown in fig. 1 or 3, a water curtain seam 6 and a water inlet port 7 which are used for spraying a water curtain towards each filter screen plate are respectively arranged above each filter screen plate; correspondingly, as shown in fig. 1 or fig. 4, a drain hole 8 is further formed at the bottom of the housing 1 to discharge sewage while clean water is introduced.
In the scheme of the invention, the filter screen plates are generally made of metal materials or corrosion-resistant materials with higher hardness and stronger toughness, and the setting number of the filter screen plates can be set according to the specification and the model size of the whole purifier or the energy efficiency ratio of the purification. When a plurality of filter screen plates are arranged in the purifying chamber 11, the mesh apertures of the filter screen plates are arranged in the order from the air inlet 12 to the air outlet 13, and the mesh apertures are arranged according to the sizes of the filter screen plates, so that the purpose of filtering by stages of primary filtering, intermediate filtering, fine filtering and superfine filtering is achieved.
In the present embodiment, three filter screens are disposed in the purifying chamber 11 as an example of the application. In particular, this is the case: as shown in fig. 1, three filter screens are respectively arranged in a purification chamber 11 of a casing 1, the three filter screens are respectively a primary filter screen 2, a middle filter screen 3 and a fine filter screen 4 in sequence in the sequence direction from an air inlet 12 to an air outlet 13, the aperture of the mesh of the primary filter screen 2 is larger than that of the mesh of the middle filter screen 3, and the aperture of the mesh of the middle filter screen 3 is larger than that of the fine filter screen 4. In order to further improve the purification energy efficiency, as shown in fig. 1, fig. 2, fig. 3 or fig. 4, the primary filter screen plate 2, the middle filter screen plate 3 or the fine filter screen plate 4 are respectively a composite filter screen formed by two screen plates 60 with the same mesh aperture and staggered mesh positions and a screen frame 602, and each screen plate 60 is made into a wave shape by punching, so that the water curtain flows along the screen plate in a covering manner, and the air passing through the water curtain has a better scouring effect.
As shown in fig. 3 or fig. 4, a gap 601 is formed between the two mesh plates 60, so that air can pause in the gap 601 for a short time to be cut by the high-frequency oscillation of the filter screen more fully, and a better purification effect is achieved. As shown in fig. 3, the top frame of the net frame 602 is further provided with the water curtain slit 6 and the water inlet 7, and the water curtain slit 6 and the water inlet 7 are provided in the net frame 602, so that the structure of the water curtain slit 6 connected to water can be greatly simplified, and the water curtain slit 6 can be maximally close to the net plate 60, so that the water curtain can flow along the net plate 60. In order to reduce the oscillation noise generated in the whole process and ensure that the oscillation force generated by the ultrasonic transducer 5 is transmitted to the filter screen plate, as shown in fig. 1, 3 or 4, the peripheral sides of the primary filter screen plate 2, the middle filter screen plate 3 and the fine filter screen plate 4 are respectively coated with a damping frame 70, and the damping frame 70 is generally made of rubber materials.
As shown in fig. 1, the bottom of the casing 1 is further provided with a sewage collecting tank 9 for collecting sewage discharged from each drain hole 8, so as to facilitate sewage collection and uniform treatment.
As shown in figure 1, the invention also comprises a sedimentation and filtration tank 10, or a sedimentation tank, and the drain hole 8 is connected with the sedimentation and filtration tank 10 and is connected with the sedimentation and filtration tank 10 through a pipeline. Of course, the sewage may be collected by the sewage collecting tank 9 and then sent to the sedimentation and filtration tank 10 by the sewage collecting tank 9 through a pipeline for filtration and sedimentation.
In order to achieve the purpose of saving water resources, as shown in fig. 1, the water inlet 7 is connected to the sedimentation and filtration tank 10 through a pipeline, and a water pump 20 is connected in series to the pipeline between the water inlet 7 and the sedimentation and filtration tank 10. The water purified by the sedimentation filter tank 10 is pumped to the filter screen plate for recycling, so that a good water-saving effect can be achieved, the direct discharge of sewage to the natural environment is avoided, and the purpose of protecting the ecological environment is achieved.
In order to prevent the air blown out by the present invention from being atomized and having low humidity, as shown in fig. 1, a dehumidifying condenser 30 for separating water from gas is further disposed on the air outlet 13 of the casing 1, a condensed water collector is further disposed at the bottom of the dehumidifying condenser 30, and the dehumidifying condenser 30 is further connected to a dehumidifying main unit 80. By the dehumidification function of the dehumidifying condenser 30, the air discharged from the air outlet 13 is not white and foggy, and the humidity is greatly reduced, so that the air humidity of the surrounding environment is not affected.
In order to improve the efficiency of the present invention in treating the turbid air, as shown in fig. 1, the air inlet 12 of the enclosure 1 is further provided with a fan 40, and the air treatment effect can be greatly improved by the pressurization of the fan 40. At this time, in order to avoid the fan blade of the fan from being stained with a large amount of dirt, as shown in fig. 1, a front-located filter screen 50 is further disposed at the front end of the fan 40 in the air inlet 12 of the casing 1, a water curtain seam 6 and a water inlet port 7 for spraying a water curtain towards each filter screen plate are further disposed above the front-located filter screen 50, and an ultrasonic transducer 5 is further disposed on the side edge of the front-located filter screen 50, so that the front-located filter screen 50 generates an ultrahigh frequency cutting oscillation filtering motion, and the operation principle of the front-located filter screen is the same as that of each filter screen plate. Through the application of the front filter screen 50, most of dust can be separated in advance, the problem that the fan blades are stained with a large amount of dirt and the air suction capacity of the fan blades is weakened is avoided, and the trouble of manually cleaning the fan blades is avoided. In addition, in order to facilitate the receiving of the sewage at the air inlet 12, a drain hole 8 and a sewage collecting tank 9 are respectively arranged at the bottom of the air inlet 12 and below the air inlet 12, and the sewage collecting tank 9 is connected with the sewage collecting tank 9 below the machine shell 1 through a pipeline or directly connected with the sedimentation filter tank 10 through a pipeline. In addition, the motor 401 of the fan 40 may be built-in or external. The exemplary embodiment shown in fig. 1 is an external motor 401, which drives the fan blade 402 via a chain and a sprocket, or a pulley and a belt.
Claims (10)
1. An ultrasonic environment purifier, its characterized in that: comprises a casing (1), at least one filter screen plate and an ultrasonic transducer (5), wherein
The machine shell (1) is provided with a purification chamber (11), and both ends of the machine shell (1) are respectively provided with an air inlet (12) and an air outlet (13);
each filter screen plate is vertically arranged in a purification chamber (11) in sequence, and the side edge of each filter screen plate is also provided with an ultrasonic transducer (5) respectively so as to enable each filter screen plate to generate ultrahigh frequency cutting oscillation filtering motion;
a water curtain seam (6) and a water inlet interface (7) which are used for spraying a water curtain towards each filter screen plate are respectively arranged above each filter screen plate;
the bottom of the machine shell (1) is also provided with a drain hole (8).
2. The ultrasonic environmental cleaner of claim 1, wherein: the purifying chamber (11) of the casing (1) is respectively provided with three filter screen plates, and the three filter screen plates are respectively a primary filter screen plate (2), a middle filter screen plate (3) and a fine filter screen plate (4) in sequence by taking an air inlet (12) to an air outlet (13) as a sequence direction.
3. The ultrasonic environmental cleaner of claim 2, wherein: the primary filter screen plate (2) or the middle filter screen plate (3) or the fine filter screen plate (4) are respectively a composite filter screen consisting of two screen plates (60) with the same mesh aperture and staggered mesh positions and a screen frame (602), a gap (601) is also formed between the two screen plates (60), and a water curtain seam (6) and a water inlet interface (7) are also arranged on the top frame of the screen frame (602).
4. The ultrasonic environmental cleaner of claim 3, wherein: the periphery sides of the primary filter screen plate (2), the middle filter screen plate (3) and the fine filter screen plate (4) are respectively coated with a damping frame (70).
5. The ultrasonic environmental cleaner of claim 1, wherein: and a sewage collecting tank (9) is also arranged at the bottom of the machine shell (1).
6. The ultrasonic environmental cleaner of claim 1, wherein: the device also comprises a sedimentation and filtration tank (10), and the drain hole (8) is connected with the sedimentation and filtration tank (10).
7. The ultrasonic environmental cleaner of claim 6, wherein: the water inlet connector (7) is connected with the sedimentation and filtration tank (10) through a pipeline, and a water pump (20) is connected in series on the pipeline between the water inlet connector (7) and the sedimentation and filtration tank (10).
8. The ultrasonic environmental cleaner of claim 1, wherein: still be equipped with dehumidification condenser (30) that are used for the aqueous vapor separation on gas outlet (13) of casing (1), the bottom of this dehumidification condenser (30) still is equipped with condensate water collector, dehumidification condenser (30) still are connected with dehumidification host computer (80).
9. The ultrasonic environmental cleaner of claim 1, wherein: the air inlet (12) of the shell (1) is also provided with a fan (40).
10. The ultrasonic environmental cleaner of claim 9, wherein: the water curtain spraying machine is characterized in that a front-mounted filter screen (50) is further arranged at the front end of the fan (40) in the air inlet (12) of the machine shell (1), a water curtain seam (6) and a water inlet interface (7) which face each filter screen plate to spray a water curtain are further arranged above the front-mounted filter screen (50), and an ultrasonic transducer (5) is further arranged on the side edge of the front-mounted filter screen (50) so that the front-mounted filter screen (50) can generate ultrahigh-frequency cutting oscillation filtering movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012262.4A CN110871000A (en) | 2018-08-31 | 2018-08-31 | Ultrasonic environment purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012262.4A CN110871000A (en) | 2018-08-31 | 2018-08-31 | Ultrasonic environment purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110871000A true CN110871000A (en) | 2020-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811012262.4A Pending CN110871000A (en) | 2018-08-31 | 2018-08-31 | Ultrasonic environment purifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN110871000A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007838A (en) * | 2021-03-31 | 2021-06-22 | 广东轻工职业技术学院 | Air purification device for building environment improvement |
| CN113599889A (en) * | 2021-04-25 | 2021-11-05 | 唐腊辉 | Ultrasonic water purifying device with vibration/noise reduction function |
| CN113623748A (en) * | 2020-05-06 | 2021-11-09 | 青岛海尔空调器有限总公司 | Air delivery assembly for water purification module, water purification module and air conditioner |
| CN114100268A (en) * | 2021-11-27 | 2022-03-01 | 柳州市海达新型材料科技股份有限公司 | Method for treating ammonia-containing waste gas in sectional manner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745274A (en) * | 2008-12-18 | 2010-06-23 | 珠海格力电器股份有限公司 | Self-cleaning device of air-conditioning filter net |
| CN102186553A (en) * | 2008-10-22 | 2011-09-14 | 熊津豪威株式会社 | Air purifier having dehumidification function |
| CN104307275A (en) * | 2014-09-26 | 2015-01-28 | 黄欢 | Method for purifying air by utilization of activated water and air cleaning unit |
| CN206642526U (en) * | 2017-02-23 | 2017-11-17 | 科兴空调设备制造有限公司 | Humidifying air clarifier in a kind of more membrane types |
| CN108452628A (en) * | 2018-05-11 | 2018-08-28 | 北京化工大学 | A kind of wet scrubber of strainer high-frequency vibration |
-
2018
- 2018-08-31 CN CN201811012262.4A patent/CN110871000A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102186553A (en) * | 2008-10-22 | 2011-09-14 | 熊津豪威株式会社 | Air purifier having dehumidification function |
| CN101745274A (en) * | 2008-12-18 | 2010-06-23 | 珠海格力电器股份有限公司 | Self-cleaning device of air-conditioning filter net |
| CN104307275A (en) * | 2014-09-26 | 2015-01-28 | 黄欢 | Method for purifying air by utilization of activated water and air cleaning unit |
| CN206642526U (en) * | 2017-02-23 | 2017-11-17 | 科兴空调设备制造有限公司 | Humidifying air clarifier in a kind of more membrane types |
| CN108452628A (en) * | 2018-05-11 | 2018-08-28 | 北京化工大学 | A kind of wet scrubber of strainer high-frequency vibration |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623748A (en) * | 2020-05-06 | 2021-11-09 | 青岛海尔空调器有限总公司 | Air delivery assembly for water purification module, water purification module and air conditioner |
| CN113007838A (en) * | 2021-03-31 | 2021-06-22 | 广东轻工职业技术学院 | Air purification device for building environment improvement |
| CN113599889A (en) * | 2021-04-25 | 2021-11-05 | 唐腊辉 | Ultrasonic water purifying device with vibration/noise reduction function |
| CN114100268A (en) * | 2021-11-27 | 2022-03-01 | 柳州市海达新型材料科技股份有限公司 | Method for treating ammonia-containing waste gas in sectional manner |
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Application publication date: 20200310 |