Air purifying and dust falling device
By using multiple ultrasonic atomizers and diversion hood acceleration systems in the air purification and dust reduction device, the problem of unsatisfactory dust reduction effect of existing fog cannon vehicles is solved, and efficient air purification and wide-range dust reduction effects are achieved, while reducing costs and water resource consumption.
Patent Information
- Application Number
- CN202311222990.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-21
- Publication Date
- 2025-03-21
AI Technical Summary
The existing fog cannon vehicles have too large particle size for dust drops to effectively capture inhalable particles such as PM2.5-PM10, and the dust reduction effect is not ideal. At the same time, ultrasonic atomizers are costly to be used in the atmosphere, have a small range, and consume a lot of water resources.
An air purification and dust reduction device is designed, and atomized in the water tank is carried out using multiple ultrasonic atomizers. The atomization plate height is showing a downward trend. There is a flow shield and a fan on the water tank. Through the flow shield, the flow guide and the fan accelerate, so that fine mist below 20 microns can quickly gather and release to the external atmosphere.
It realizes efficient air purification and wide-range dust reduction effects, reduces cost and water resource consumption, and improves the capture ability of PM2.5-PM10 particles.
Smart Images
Figure CN119656746A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of air purification and dust removal, and in particular to an air purification and dust reduction device. Background Art
[0002] With the development of social economy and production, haze often occurs in many areas in northern my country. Haze is a weather phenomenon caused by particles of PM2.5 and other sizes floating in the atmosphere, dust, aerosols and other particles under certain temperature and humidity conditions and relatively stable conditions. Haze has a great impact on people's health and daily life. At present, there are many kinds of equipment with dust reduction functions, among which sprinkler trucks, fog cannon trucks and street lights equipped with fog cannons are the most widely used. Fog cannon trucks have better water-saving effects than sprinkler trucks and better dust reduction effects than sprinkler trucks. However, the particle size of the water mist produced by fog cannons is mostly 100-600 microns, and the dust adsorption effect is poor. At least 50% of the water droplets cannot be effectively used and fall directly on the ground, causing the ground to be slippery. According to aerodynamic theory, when the dust-laden airflow bypasses the droplets, the dust particles will deviate from the circling gas due to inertia and collide with the droplets and be captured. The probability of being captured is related to the diameter of the droplets. When the diameter of the droplets is close to the diameter of the dust particles, the droplets are more likely to capture dust. Studies have shown that the dust collection effect is best when the ratio of the droplet diameter to the dust particle diameter is within the range of 1.25-5. However, since the diameter of the water mist particles produced by the fog cannon is mostly 100-600 microns, it can only capture PM20 or even larger particles, and the effect of capturing and reducing dust is not ideal for PM2.5-PM10 particles that can be inhaled by the human body.
[0003] When ultrasonic waves propagate in liquids, under the combined effects of mechanical effects, thermal effects, and acoustic cavitation effects, a large number of pores will appear inside the liquid, and at the same time, the intermolecular forces will be destroyed, causing the liquid to disperse and achieving water atomization. Ultrasonic atomization of water can produce 0.5-20 micron water mist, which is much more effective than fog cannons in capturing and reducing dust for PM2.5-PM10 particles that can be inhaled into the human body. Part of the fine mist droplets below 20 microns will evaporate rapidly in the air, causing the relative humidity of the air in the locally enclosed dust-catching space to quickly become saturated. The saturated water vapor condenses with dust particles as nuclei to form "rain" and falls down, which is particularly effective in suppressing submicron ultra-fine dust. The outdoor air purification and dust reduction device is different from the conventional indoor air purifier. It faces the open atmosphere. Therefore, directly applying the indoor air purifier to the atmosphere not only has extremely limited dust reduction effects, but also has extremely high costs and a small air purification range. At the same time, ultrasonic atomization will consume a large amount of water and cause the water level to drop. The distance between the atomizer and the water surface (i.e., the water level) directly affects the atomization effect, thereby affecting the air purification efficiency. Traditional air purifiers only roughly add excessive water, and the atomizer stops working when it is higher than the water level. Therefore, its actual purification effect needs further study. Summary of the invention
[0004] The object of the present invention is to provide an air purification and dust reduction device, which has high atomization efficiency, good air purification effect, wide purification range, simple structure and low cost.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] An air purification and dust reduction device comprises a water tank, wherein a plurality of ultrasonic atomizers are arranged in the water tank, the ultrasonic atomizer comprises an atomizing sheet, the height of the atomizing sheet basically shows a downward trend from the middle to the two sides, the water in the water tank can immerse the atomizing sheet, the atomizing sheet vibrates to cause water atomization to gather on the water surface and above the water surface, the distance between the top surface of the atomizing sheet and the water surface is 1cm-6cm; a guide cover which gradually rises and contracts from the two sides to the middle is arranged on the water tank, the guide cover can cover the water tank and is provided with a mist outlet, a fan is arranged on the mist outlet, and the micro mist formed after the water is atomized is guided by the guide cover and then discharged to the outside atmosphere through the mist outlet under the action of the fan.
[0007] Preferably, there are several water tanks, and gaps are left between adjacent water tanks. A hair dryer is provided under the water tank, and the wind blown by the hair dryer causes the micro mist gathered on the water surface and above the water surface to have a movement trend from bottom to top.
[0008] Preferably, it also includes a chamber, the water tank is arranged in the chamber, the guide cover is arranged on the chamber, the ultrasonic atomizer is arranged in a stepped manner basically in a descending trend from the middle to both sides, and the distance between the atomizing sheet and the guide cover is 60cm-80cm.
[0009] Preferably, the hair dryer is provided with several and is connected to a basically horizontally arranged guide channel, a plurality of air outlet holes are provided on the guide channel, the wind blown out by the hair dryer is guided by the guide channel and then blown into the chamber from the air outlet holes, the guide channel basically runs through the chamber and the end of the guide channel is blocked, as the distance of the guide channel from the blower increases, the air outlet holes tend to increase or the number of air outlet holes tends to increase, and the distance between the atomizing sheet and the guide cover is 65cm-75cm.
[0010] Preferably, the ultrasonic atomizer is fixedly connected to the water tank or the ultrasonic atomizer is floated in the water tank, and the distance between the top surface of the atomizer sheet and the water surface is 2cm-5cm; when the ultrasonic atomizer is floated in the water tank, a hollow floating adjustment cavity is provided in the water tank, and the floating adjustment cavity is floated or suspended in the water of the water tank. The ultrasonic atomizer is carried on the floating adjustment cavity, and the floating adjustment cavity is filled with liquid or foam or solid filler. The distance between the top surface of the atomizer sheet and the water surface is adjusted by adjusting the liquid content or foam content or solid filler in the floating adjustment cavity.
[0011] Preferably, a water injection port or a filling port is provided on the floating adjustment chamber, and each ultrasonic atomizer is mounted on at least two floating adjustment chambers; the distance between the top surface of the atomizing sheet and the water surface is 3cm-4.5cm.
[0012] Preferably, the mist outlet is connected to the flow guide pipe.
[0013] Preferably, a spiral guide plate is provided in the guide tube.
[0014] Preferably, there are a plurality of fans, each of which is arranged in an axial array and the air outlets of the fans are substantially consistent with the extending direction of the spiral guide plates.
[0015] Preferably, it also includes a filtering device and a water pump, the water tank is connected to the filtering device via the water pump, a liquid level sensor is provided on the floating adjusting chamber, a recess is provided on the floating adjusting chamber, an ultrasonic atomizer is mounted on the recess of the floating adjusting chamber, and the cross-section of the floating adjusting chamber is basically rectangular, semicircular, semi-elliptical or fan-shaped.
[0016] In the above technical scheme, the vibration of the atomizing sheet causes the water to be atomized to form a large amount of fine mist below 20 microns and gather on the water surface and above the water surface. By setting a deflector that gradually rises and gathers from both sides to the middle, the water mist can be guided, gathered and then released to the outside atmosphere, ensuring the concentration of the water mist discharged into the air, avoiding the water mist concentration being too low to cause a large amount of evaporation and loss in a short time, and achieving rapid saturation of the relative humidity of the local air. The saturated water vapor condenses with dust particles as the core to achieve the dust reduction effect. By setting the ultrasonic atomizer to be arranged in a step-like manner with a downward trend from the middle to the two sides, the vertical distance between most of the atomizing sheets and the deflector can be maintained at 65cm-75cm, avoiding the atomizing sheets on both sides being too close to the deflector and condensing into water droplets on the deflector or the atomizing sheets in the middle being too far from the deflector to cause travel waste. By setting a hair dryer under the water tank, the micro mist gathered on the water surface and above the water surface has a downward movement trend, and this part of the micro mist is initially accelerated to make it quickly gather and release. The air outlets of multiple fans are basically consistent with the extension direction of the spiral guide plate, which accelerates the fine mist twice and makes this part of the fine mist spirally accelerate and rise along the spiral guide plate in the guide tube, further extending the acceleration time and stroke of the fine mist, increasing the speed and height of the fine mist discharge, and improving the purification height and purification range. By mounting the ultrasonic atomizer on the floating adjustment chamber, adjusting the liquid content or foam content or solid filler in the floating adjustment chamber, and adjusting the distance between the top surface of the atomizer and the water surface, the atomizer and the buoyancy of the floating adjustment chamber and its own gravity reach a specific dynamic balance, so that the atomizer can be adaptively adjusted according to the water level change, the distance between the top surface of the atomizer and the water surface is always maintained between 3cm-4.5cm, the atomizer is always suspended in the water and continuously and efficiently produces fine mist, and the floating adjustment chamber adjusts the position of the atomizer with a simple structure and low cost. By adjusting the vibration frequency of the ultrasonic atomizer, the water mist particle size is adjusted to produce droplets that are easier to capture dust according to the air quality, further improving the dust reduction, haze reduction, and purification effects, while saving more water. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of the air purification and dust reduction device;
[0018] Figure 2 This is a schematic diagram of the top view structure of the air purification and dust reduction device (without the air guide cover);
[0019] Figure 3 This is a schematic diagram of the top view of the structure of the air purification and dust reduction device (omitting the air guide cover and water tank);
[0020] Figure 4 This is a schematic diagram of the main structure of the first implementation mode of the floating adjustment chamber (when the ultrasonic atomizer is mounted in a floating adjustment chamber);
[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the first implementation mode of the floating adjustment chamber (when the ultrasonic atomizer is mounted in a floating adjustment chamber);
[0022] Figure 6 This is a schematic diagram of the main structure of the second implementation mode of the floating adjustment chamber (when the ultrasonic atomizer is mounted on two floating adjustment chambers);
[0023] Figure 7 It is a schematic diagram of the top view of the structure of the second implementation mode of the floating adjustment chamber (when the ultrasonic atomizer is mounted on two floating adjustment chambers). DETAILED DESCRIPTION
[0024] The present invention will be further described below in conjunction with the accompanying drawings:
[0025] like Figure 1-Figure 7As shown, the air purification and dust reduction device includes a water tank 1, in which a plurality of ultrasonic atomizers 2 are arranged. The height of the ultrasonic atomizers 2 is basically decreasing from the middle to the two sides, and is preferably arranged in a stepped manner basically decreasing. The ultrasonic atomizer 2 includes an atomizing sheet 21. The water in the water tank can submerge the atomizing sheet 21. The atomizing sheet 21 vibrates to cause the water to be atomized and gathered on the water surface and above the water surface. A guide cover 3 is provided on the top or upper part of the water tank, which is gradually raised and gathered from the two sides to the middle. The guide cover can cover the water tank and has a mist outlet 31 on the guide cover. A fan 4 is provided on the mist outlet 31, so that the fine mist formed after the water is atomized is guided and gathered by the guide cover 3 and then released to the outside atmosphere under the action of the fan, thereby ensuring the concentration of the water mist discharged into the air, avoiding a large amount of evaporation and loss in a short time due to too low a concentration of the water mist, and realizing rapid saturation of the local air relative humidity. The saturated water vapor condenses with dust particles as nuclei to achieve the dust reduction effect. The distance between the top surface of the atomizer sheet and the water surface is 1cm-6cm; preferably 2cm-5cm, because the oscillation energy generated by the atomizer sheet will propagate in the water in a direction perpendicular to the surface of the atomizer sheet. Under the condition of appropriate water depth, the water surface on the energy propagation axis will concentrate on a water column, and a large number of tiny tension waves will occur at the front end of the water column, which will greatly reduce the surface tension of the raised water surface. The water surface is split into many tiny areas by the wavelength of the surface tension wave, and each area becomes a microparticle independently as if it is not bonded to each other, and is emitted in the air to form a fog effect. After a large number of tests, it is found that when the distance between the top surface of the atomizer sheet and the water surface is 3cm-4.5cm, the atomizer sheet can maintain efficient atomization and form more fine fog. The height of the ultrasonic atomizer 2 is generally decreasing from the middle to the two sides, and the guide cover 3 is gradually increased from the two sides to the middle, so the vertical distance between most of the atomizing sheets and the guide cover can be maintained at 60cm-80cm, and the vertical distance between the atomizing sheets and the guide cover is preferably 65cm-75cm, so as to avoid the atomizing sheets on both sides being too close to the guide cover so that they condense into water droplets on the guide cover, or the atomizing sheets in the middle being too far from the guide cover, causing travel waste and affecting the amount of mist output. In one embodiment, the water tank 1 is provided with a plurality of water tanks that are generally decreasing from the middle to the two sides, preferably arranged in a step-like manner that is generally decreasing, and a gap 11 is left between adjacent water tanks, and a hair dryer 5 is provided at the lower part of the water tank 1, and the wind blown by the hair dryer 5 causes the micro-mist gathered on and above the water surface to move from bottom to top, and initially accelerates this part of the fine mist, so that it can be quickly gathered and released.Furthermore, the air purification and dust reduction device also includes a chamber 6, the above-mentioned water tank is arranged in the chamber 6, the deflector 3 is arranged on the chamber 6, a plurality of hair dryers are provided and the hair dryers are connected to the deflector channel 7 which is basically arranged horizontally, and a plurality of air outlet holes 71 are provided on the side of the deflector channel 7, preferably on the upper side, so that the wind blown out by the hair dryer 5 is guided by the deflector channel 7 and then blown into the chamber 6 by the air outlet holes 71, the deflector channel 7 basically runs through the chamber 6 and is blocked at the end, the hair dryers are preferably 3 or more and as the distance of the deflector channel from the fan increases, the aperture of the air outlet tends to increase or the number of the air outlet tends to increase, that is, as the distance of the deflector channel 7 from the fan 5 increases, the air outlet holes 71 become larger or the number of the air outlet holes 71 increases.
[0026] In a preferred embodiment, the ultrasonic atomizer is fixedly connected to the water tank or the ultrasonic atomizer is floated in the water tank. When the ultrasonic atomizer is floated in the water tank, a hollow floating adjustment chamber 8 is provided in the water tank 1. The floating adjustment chamber is floated or suspended in the water of the water tank. The ultrasonic atomizer 2 is mounted on the floating adjustment chamber 8, so that the atomizer sheet is suspended in the water. The floating adjustment chamber 8 is filled with liquid or foam or solid filler. By adjusting the liquid content or foam content or solid filler in the floating adjustment chamber, the distance between the top surface of the atomizer sheet and the water surface is adjusted, so that the buoyancy of the atomizer sheet together with the floating adjustment chamber and its own gravity reach a specific dynamic balance, so that the atomizer sheet can be adaptively adjusted according to the water level change, and the distance between the top surface of the atomizer sheet and the water surface is always maintained between 3cm-4.5cm. The atomizer sheet is always suspended in the water and continuously and efficiently produces fine mist. The floating adjustment chamber adjusts the position of the atomizer sheet with a simple structure and low cost. Furthermore, a water injection port 81 or a filling port is provided on the side wall or the top surface of the floating adjustment chamber 8, the ultrasonic atomizers are evenly mounted on at least two floating adjustment chambers 8, a recessed portion 82 is provided on the floating adjustment chamber, the ultrasonic atomizer 2 is fixed and mounted on the recessed portion 82 of the floating adjustment chamber, and the cross-section of the floating adjustment chamber is basically rectangular, semicircular, semi-elliptical or fan-shaped, so the floating adjustment chamber and the ultrasonic atomizer are not easy to overturn.
[0027] In a preferred embodiment, the mist outlet 31 is connected to the guide pipe 32, so that the fine mist formed after the water atomization is guided and gathered by the guide cover 3, and then released to the outside atmosphere through the guide pipe 32 under the action of the fan, thereby improving the air purification height. Furthermore, a spiral guide plate 33 is provided in the guide pipe 32, and a plurality of fans, preferably 3, are provided. Each fan is arranged in an axial array and the air outlet of the fan is basically consistent with the extension direction of the spiral guide plate, so that the wind generated by the fan will accelerate along the spiral guide plate 33 to achieve secondary acceleration of the fine mist and make this part of the fine mist spirally accelerate and rise along the spiral guide plate in the guide pipe, further extending the acceleration time and acceleration stroke of the fine mist, increasing the speed and height of the fine mist discharge, and improving the purification height and purification range.
[0028] In a preferred embodiment, the air purification and dust reduction device also includes a filter device 91 and a water pump 92. The water tank is connected to the filter device 91 via the water pump 92 to ensure the water quality in the water tank. A liquid level sensor 83 can be further provided on the floating adjustment chamber, and the liquid level sensor 83 is connected to the water pump via a control system. In this way, when the water level in the water tank is low and the atomizer cannot be suspended in the water or does not meet the suspension requirements, the liquid level sensor 83 detects that the water level is low, and the water pump supplies water to the water tank to ensure that the atomizer continues to atomize. Furthermore, the control system can adjust the vibration frequency of the ultrasonic atomizer atomizer, thereby adjusting the water mist particle size to produce droplets that are easier to capture dust according to the air quality, further improving the dust reduction, haze reduction, and purification effects, while saving more water. The above-mentioned fans and hair dryers are all DC brushless fans with high wind pressure, high efficiency, and long service life.
[0029] In the above technical scheme, the vibration of the atomizing sheet atomizes the water to form a large amount of fine mist below 20 microns and gathers on the water surface and above the water surface. The wind blown out by the hair dryer 5 is guided by the guide channel 7 and blown into the chamber 6 through the gap 11 between the adjacent water tanks from the air outlet 71, so that the fine mist gathered on the water surface and above the water surface has a downward movement trend, and this part of the fine mist is initially accelerated to make it gather quickly; the wind generated by the fan accelerates along the spiral guide plate 33, and the fine mist gathered at the mist outlet is accelerated again, so that this part of the fine mist rises along the spiral guide plate in the guide pipe, further extending the acceleration time and acceleration stroke of the fine mist, increasing the speed and height of the fine mist discharge, and improving the purification height and purification range. Because the distance between most of the atomizing sheets and the guide cover can be maintained in a suitable range, the fine mist will neither condense into water droplets in large quantities nor waste the stroke, and the discharged water mist is large in amount and high in concentration, fast in speed, and high in height. The atomizer sheet is adaptively adjusted according to the water level changes under the carrying and regulating action of the floating regulating chamber. The distance between the top surface of the atomizer sheet and the water surface is always maintained between 3cm-4.5cm. The atomizer sheet is always suspended in the water and continuously and efficiently produces fine mist, with high atomization efficiency and good air purification effect.
[0030] This embodiment is only an illustration of the concept and implementation of the present invention, and does not limit it. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.
Claims
1. An air purification and dust reduction device, comprising a water tank, characterized in that: A plurality of ultrasonic atomizers are arranged in the water tank, and the ultrasonic atomizers include atomizer sheets, and the height of the atomizer sheets basically decreases from the middle to the two sides. The water in the water tank can immerse the atomizer sheets, and the atomizer sheets vibrate to cause the water to be atomized and gathered on the water surface and above the water surface. The distance between the top surface of the atomizer sheet and the water surface is 1cm-6cm; a guide cover is arranged on the water tank, which gradually rises and contracts from the two sides to the middle, and the guide cover can cover the water tank and has a mist outlet on the guide cover. A fan is arranged on the mist outlet, and the micro mist formed after the water is atomized is guided by the guide cover and then discharged to the outside atmosphere through the mist outlet under the action of the fan.
2. The air purification and dust reduction device according to claim 1, characterized in that: A plurality of water tanks are provided, and gaps are left between adjacent water tanks. A blower is provided under the water tank, and wind blown by the blower causes the micro mist gathered on the water surface and above the water surface to have a downward movement tendency.
3. The air purification and dust reduction device according to claim 2, characterized in that: It also includes a chamber, the water tank is arranged in the chamber, the guide cover is arranged on the chamber, the ultrasonic atomizer is arranged in a stepped manner from the middle to both sides in a basically descending trend, and the distance between the atomizing sheet and the guide cover is 60cm-80cm.
4. The air purification and dust reduction device according to claim 3, characterized in that: The hair dryer is provided with a plurality of guide channels which are basically arranged horizontally, and a plurality of air outlet holes are arranged on the guide channel. The wind blown out by the hair dryer is guided by the guide channel and then blown into the chamber through the air outlet holes. The guide channel basically runs through the chamber and the end of the guide channel is blocked. As the distance of the guide channel from the blower increases, the number of air outlet holes tends to increase or the number of air outlet holes tends to increase. The distance between the atomizing sheet and the guide cover is 65cm-75cm.
5. The air purification and dust reduction device according to any one of claims 1 to 4, characterized in that: The ultrasonic atomizer is fixedly connected to the water tank or the ultrasonic atomizer is floated in the water tank, and the distance between the top surface of the atomizer sheet and the water surface is 2cm-5cm; when the ultrasonic atomizer is floated in the water tank, a hollow floating adjustment cavity is provided in the water tank, and the floating adjustment cavity is floated or suspended in the water of the water tank. The ultrasonic atomizer is carried on the floating adjustment cavity, and liquid, foam or solid filler is filled in the floating adjustment cavity. The distance between the top surface of the atomizer sheet and the water surface is adjusted by adjusting the liquid content, foam content or solid filler in the floating adjustment cavity.
6. The air purification and dust reduction device according to claim 5, characterized in that: A water injection port or a filling port is provided on the floating adjustment chamber, and each ultrasonic atomizer is mounted on at least two floating adjustment chambers; the distance between the top surface of the atomizing sheet and the water surface is 3cm-4.5cm.
7. The air purification and dust reduction device according to any one of claims 1 to 4, characterized in that: The mist outlet is connected to the flow guide pipe.
8. The air purification and dust reduction device according to claim 7, characterized in that: A spiral guide plate is arranged in the guide pipe.
9. The air purification and dust reduction device according to claim 8, characterized in that: There are a plurality of fans, each of which is arranged in an axial array and the air outlets of the fans are substantially consistent with the extending direction of the spiral guide plates.
10. The air purification and dust reduction device according to claim 6, characterized in that: It also includes a filtering device and a water pump. The water tank is connected to the filtering device via the water pump. A liquid level sensor is provided on the floating adjusting chamber. A recessed portion is provided on the floating adjusting chamber. The ultrasonic atomizer is mounted on the recessed portion of the floating adjusting chamber. The cross-section of the floating adjusting chamber is basically rectangular, semicircular, semi-elliptical or fan-shaped.