CN115608101A

CN115608101A - Air purification device based on circular arc efflux is aired exhaust

Info

Publication number: CN115608101A
Application number: CN202211398609.XA
Authority: CN
Inventors: 钱华; 周歆达; 郑晓红
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-01-17

Abstract

The invention relates to an air purification device based on arc jet exhaust, which comprises an inner pipe and an outer pipe sleeved outside the inner pipe, wherein an air inlet channel is formed inside the inner pipe, a jet channel is formed between the outer wall of the inner pipe and the inner wall of the outer pipe, the upper end of the air inlet channel is an air inlet used for sucking air to be purified, the lower end of the air inlet channel is an outlet and is communicated with the lower end of the jet channel, the upper end of the jet channel is a jet outlet used for discharging purified air through jet flow, the jet outlet surrounds the outer ring of the air inlet along the circumferential direction, so that the purified air discharged from the jet outlet surrounds the outer ring of the air to be purified sucked from the air inlet to form a high-speed jet air curtain, a drainage fan is arranged in the air inlet channel, and a purification part and a diffusion port are arranged in the jet channel. The invention can suck the polluted air flow from the emission source to the exhaust port at a long distance and purify the polluted air flow, thereby achieving the purpose of directly capturing and purifying the polluted air flow from the polluted source.

Description

Air purification device based on circular arc efflux is aired exhaust

Technical Field

The invention relates to the technical field of air purification, in particular to an air purification device based on arc jet flow exhaust.

Background

The current air purifier adopts a dilution ventilation strategy for purifying the whole space, and cannot lock a pollution source to control the flow direction of polluted air flow and suck away the polluted air flow in time. This can result in a contaminated air stream being distributed throughout the space, requiring the air purifier to purify the entire space where air quality is affected. However, the existing technical research directions in the aspect of air purification mostly focus on the aspects of purification mode, process optimization and the like, and the fundamental problem of dilution ventilation strategy is not solved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the air purification device based on the arc jet flow exhaust, which can suck the polluted air flow from the emission source to the exhaust port at a long distance and purify the polluted air flow, thereby achieving the purpose of directly capturing and purifying the polluted air flow from the polluted source.

The technical scheme adopted by the invention is as follows:

the utility model provides an air purification device based on circular arc efflux is aired exhaust, includes that inner tube, cover are located the outside outer tube of inner tube, the inside inlet channel that constitutes of inner tube, the inner tube outer wall with constitute the fluidic channel between the outer tube inner wall, be used for inlet channel's upper end is the air inlet for inhale and treat air-purifying, inlet channel's lower extreme is the export, and with fluidic channel's lower extreme is linked together, fluidic channel's upper end is the efflux export for the efflux discharges air-purifying, the efflux export centers on along the circumferencial direction in the outer lane of air inlet, makes from efflux export exhaust air-purifying around form high-speed efflux air curtain from the inspiratory outer lane of treating air-purifying of air inlet, be equipped with drainage fan in the inlet channel, be equipped with the purification part among the fluidic channel.

The further technical scheme is as follows:

the air purifier further comprises diffusing ports which are distributed along the circumference and used for diffusing and discharging purified air, the diffusing ports are arranged on the outer pipe and located at the downstream of the purifying part, and the opening degree of the diffusing ports is adjustable.

An inner arc section and an outer arc section which are in transition connection are respectively formed between the jet flow outlet and the inner pipe and between the jet flow outlet and the outer pipe, and the radius of the inner arc section is larger than that of the outer arc section.

An angle alpha is formed between the flow direction of the jet flow outlet and the flow direction of the air inlet, and alpha is more than 80 degrees and less than 90 degrees.

The inner pipe and the outer pipe are coaxially arranged, and a first straight pipe part used for aligning a pollution source, a diversion bent pipe part used for connecting the first straight pipe part and the second straight pipe part and a second straight pipe part used for connecting with a supporting surface are formed from top to bottom;

the drainage fan is positioned at the position where the first straight pipe part is connected with the flow guiding bent pipe part, and the purification part is positioned at the second straight pipe part;

the purification component is an adsorption material.

Still include the water conservancy diversion stopper, the water conservancy diversion stopper sets up and is being located in the jet flow channel of first straight tube portion, plug up the part and be located the jet flow export of air inlet below, make the air discharge from the jet flow export that is located air inlet top and both sides after purifying.

The profile of the flow guide plug is matched with the profile of the jet flow channel close to the jet flow outlet, and concave cambered surfaces are respectively formed on two side surfaces of the flow guide plug.

The pipe section of the inner pipe close to the outlet of the air inlet channel is a tapered section, and the small-diameter end of the inner pipe is an outlet.

The lower end of the jet flow channel is provided with a flow guide arc, and the flow guide arc guides the air flow flowing downwards in the air inlet channel upwards to the jet flow channel.

The invention has the following beneficial effects:

the invention can suck the polluted air flow from the emission source to the exhaust port for purification at a longer distance, thereby achieving the purpose of directly capturing and purifying the polluted air flow from the polluted source. The air intake and the jet flow are integrated, the gas utilization rate is high, the energy consumption is low, and the required air intake flow is less than that of a common air purifier. The device can realize the capture of polluted air flow at a longer distance under the conditions of small flow, low noise and low energy consumption, ensures the effective purification of indoor pollution, improves IAQ, and has considerable application prospect.

The invention can control the power of the drainage fan by adjusting the opening and the size of the flow dispersing opening and combining the frequency conversion mode of the motor, change the momentum ratio of jet flow and air suction (air inlet), and achieve the effect of adjusting the trapping distance and range of the air inlet.

The invention avoids the vortex influence at the corner between the jet flow channel and the jet flow outlet, reduces the turbulence intensity, the flow resistance and the noise, effectively reduces the pressure loss in the jet flow process, optimizes the flow field and further increases the collecting distance.

The invention increases the airflow velocity and the pressure intensity of the outlet section of the air inlet channel by arranging the reducing section, prepares for steering, reduces the loss in the steering process of exhaust-to-jet flow and effectively prevents backflow.

The invention is suitable for application scenes placed on the workbench by arranging the flow guide plug, ensures that the jet flow outlet is only positioned above the air suction port and in the two side areas, avoids jet flow towards the workbench, and avoids the influence of the workbench surface on the jet flow isolation effect. Meanwhile, the diversion cambered surface on the side surface of the diversion plug effectively reduces the pressure loss and flow state disorder when the jet gas at the lower part in the pipe changes the direction and jets upwards.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the present invention (the purge component is not shown).

Fig. 2 is a schematic structural diagram of a diffusing port according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of an air inlet and a jet outlet according to an embodiment of the present invention.

Fig. 4 is a schematic view of an installation structure of the flow guide plug according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a flow guide plug according to an embodiment of the present invention.

Fig. 6 is a schematic view of an installation structure of the purification unit according to the embodiment of the present invention.

Fig. 7 is a longitudinal sectional view of fig. 6.

In the figure: 1. a jet outlet; 2. an air inlet; 3. a flow guide plug; 4. an outer tube; 5. a fluidic channel; 6. an air intake passage; 7. a drainage fan; 8. a flow dispersing port; 10. a diversion arc; 11. a tapered section; 12. an outer arc segment; 13. an inner arc section; 14. an inner tube; 15. an inner concave cambered surface; 16. a purification component; 100. a first straight pipe portion; 300. a second straight tube portion; 200. a flow guiding bent pipe part.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the air purification apparatus based on circular-arc jet exhaust of this embodiment includes an inner tube 14, an outer tube 4 sleeved outside the inner tube 14, an air inlet channel 6 is formed inside the inner tube 14, a jet channel 5 is formed between an outer wall of the inner tube 14 and an inner wall of the outer tube 4, an upper end of the air inlet channel 6 is an air inlet 2 for sucking air to be purified, a lower end of the air inlet channel 6 is an outlet and is communicated with a lower end of the jet channel 5, an upper end of the jet channel 5 is a jet outlet 1 for discharging purified air through jet, the jet outlet 1 surrounds an outer ring of the air inlet 2 in a circumferential direction, so that purified air discharged from the jet outlet 1 surrounds an outer ring of the air to be purified sucked from the air inlet 2 to form an air curtain, a flow guiding fan 7 is disposed in the air inlet channel 6, a purification component 16 is disposed in the jet channel 5, and an installation structure of the purification component 16 is shown in fig. 6 and 7.

When the air purification device based on circular arc jet exhaust of the embodiment works, the drainage fan 7 is utilized to suck polluted air flow from the emission source into the air inlet channel 6 from the air inlet 2, then the polluted air flow flows into the jet channel 5 from the outlet of the air inlet channel 6 through the diversion circular arc turning around, and finally the polluted air flow is discharged from the jet outlet 1 after being purified by the purification component 16. Wherein, purification unit 16 can adopt the adsorption filtration material, and the adsorption filtration material adopts porous filter material and active carbon combination, and it becomes annular structure, installs in the fluidic channel, can be used to filter the absorption, both plays the effect of getting rid of the peculiar smell and also can filter the particulate matter.

The air purification device who airs exhaust based on circular arc efflux of above-mentioned embodiment utilizes the high-speed efflux air curtain around the circular arc efflux formation of air inlet 2 outer lane of efflux export 1 exhaust, has isolated the gas outside the air inlet certain limit, forms the entrainment to the contaminated air, makes efficiency of breathing in and the distance of breathing in promote greatly. Therefore, the polluted air flow can be directly sucked away from the pollution source and purified at a longer distance, and the purpose of directly eliminating the polluted air flow from the pollution source is achieved. Through with polluting the air current water conservancy diversion to the efflux passageway, use as efflux gas after filtering purification, only realize two processes of airing exhaust and efflux promptly with a fan, make the exhaust of whole device and efflux integrated as an organic whole, this makes gas utilization rate rise greatly, whole device only needs a fan as the power supply, the energy utilization of drainage fan has been improved, compare the ordinary exhaust hood that needs add the efflux fan and show energy-conservation and realized energy saving and emission reduction effect, the economic nature and the efficiency of device operation have been promoted. The defects of large energy consumption, high material consumption, need of recollecting jet gas and the like in various trapping modes in the prior art are overcome. And the required suction flow is less than that of the common air purifier, so that the device is suitable for collecting polluted air flow from a longer distance under the conditions of small flow, low noise and low energy consumption.

As shown in fig. 2, the air purification apparatus based on circular-arc jet exhaust of the above embodiment further includes diffusing openings 8 distributed along the circumference for diffusing and discharging the purified air, the diffusing openings 8 are disposed on the outer tube 4 and located downstream of the purification component 16, and the opening of the diffusing openings 8 is adjustable.

The structure with the opening-adjustable dispersion port 8 can specifically adopt a louver structure, as shown in fig. 2, 4 dispersion louver units which are symmetrical are arranged along the circumference of the outer pipe, each unit is provided with 6 dispersion ports with the maximum opening width of 4mm, each dispersion port is provided with a louver, and the opening and closing size of the louver can be adjusted to realize the dispersion flow adjustment of clean air.

The arrangement of the dispersion port can play a role in balancing the flow and pressure of the gas, and can realize the capture of polluted air in different distances and ranges. One part of purified air is diffused and discharged from the diffusing port, the other part of purified air is discharged from the jet flow outlet, and the total flow is not changed, so that the flow of the jet flow is changed by adjusting the flow of the diffusing port, the momentum ratio of the jet flow is influenced, and the suction range and distance are controlled. Because the momentum of jet exhaust and the momentum of air suction are different, the momentum ratio can influence the distance, range and efficiency of air suction, and meanwhile, the air suction flow can also influence the parameters. The air suction flow and the jet flow can be cooperatively changed by adjusting the fan power of the drainage fan 7 and the opening and closing size of the shutter of the air diffusing port 8, so that polluted air in different distances and ranges can be collected.

As shown in fig. 3, an inner arc section 13 and an outer arc section 12 are respectively formed between the jet outlet 1 and the inner tube 14 and the outer tube 4, and the radius of the inner arc section 13 is larger than that of the outer arc section 12. Namely, the jet flow outlet is realized by respectively turning the inner pipe orifice and the outer pipe orifice outwards into an inner arc section and an outer arc section. It can be understood that the air inlet 2 is an arc gradually flaring of the inner pipe orifice. The circular arc transition enlarges the air inlet, so that the transition is formed between the air inlet and the air inlet channel, and the exhaust resistance is reduced.

The flow direction of the jet outlet 1 and the flow direction of the gas inlet 2 form an angle α as shown in fig. 3, 80 ° < α < 90 °.

The setting of above-mentioned angle prevents that jet outlet and fluidic channel are the degree of turbulence height that 90 jiaos lead to, the disorderly problem of flow state, showing and having reduced the efflux pressure loss, resistance and noise, promote the efflux effect, guarantee that the efflux can not be influenced air intake efficiency by the air intake stream entrainment, and then isolated breathing in (admit air) the off-range air better, the certain degree has reduced the scope of admitting air, the entrapment distance of admitting air has been increased, can realize in farther distance pertinence ground from the pollution sources and inhale away the pollutant.

Referring to fig. 1, the inner tube 14 and the outer tube 4 are coaxially arranged with the gas flow streams therein being parallel and opposite. The whole structure forms a first straight pipe part 100 for aligning with a pollution source, a diversion bent pipe part 200 for connecting the first straight pipe part 100 and a second straight pipe part 300, and the second straight pipe part 300 for connecting with a supporting surface from top to bottom; the flow guide fan 7 is located at a position where the first straight pipe portion 100 and the flow guide bent pipe portion 200 are connected, and the purification unit 16 is located at the second straight pipe portion 300. When polluting the source position and changing, need not remove whole device, only need rotate first straight tube portion, the direction that the air inlet of adjustment first straight tube portion aimed at, then according to the far and near adjustment entrapment distance of air inlet to the pollution source: the power of the drainage fan and the size of the flow dispersion shutter are changed and the jet flow momentum ratio is adjusted to be proper. When the device received and shakes, when the vibration effect, except that the gas flow can take place certain undulant, the air current flow line still receives the physical structure restraint of device, can not take place obvious change and flow backwards even, for traditional air purifier device operation more stable and can pertinence inhale away fast and purify the pollutant, rather than promote air quality through diluting the mode, efficiency is obviously higher, also more the energy can be saved.

As shown in fig. 4, the air cleaning device based on the circular arc jet exhaust of the above embodiment further includes a deflector plug 3, and the deflector plug 3 is disposed in the jet passage 5 of the first straight pipe portion 100, and blocks a part of the jet outlet 1 located below the air inlet 2, so that the cleaned air is discharged from the jet outlets 1 located above and at both sides of the air inlet 2.

As shown in fig. 5, the profile of the guide plug 3 matches the profile of the jet outlet 1 and the jet passage 5 near the jet outlet 1, and concave arc surfaces 15 are respectively formed on two side surfaces of the guide plug 3.

In particular, the effect of the deflector plug is to cause the jet outlet not to circumferentially surround the air inlet 360 °, but to cause the jet to exit only from the upper and two sides of the air inlet. By changing the circumferential dimension of the guide plug, the region located at 90 ° below the air inlet in the circumferential direction can be blocked, i.e. the jet outlet projects only along the region located at 270 ° above the air inlet in the circumferential direction. The purpose of this is that if the device is mounted in a low position, the jet emerging from below the air inlet may impact a person or other object. For example, when the device is placed in an application scene on a workbench, the jet flow outlet is only positioned above the air suction port and in the two side areas, jet flow to the workbench is avoided, and the problem of unsmooth flow in the pipe caused by impact of the jet flow on the workbench surface is solved. The concave cambered surface 15 enables the lower jet gas to flow upwards along the surface of the lower jet gas, so that the jet is ensured not to be ejected from the area blocked by the flow guide plug, meanwhile, the loss of upward ejection caused by the change of the direction of the lower jet and the problem of unsmooth flow in the pipe caused by non-full-angle jet are reduced, and the exhaust effect is greatly improved.

As shown in fig. 6 and 7, the pipe section of the inner pipe 14 near the outlet of the intake passage 6 is a tapered section 11, and the small diameter end thereof is the outlet. The gas flow increases in the tapered section 11 due to volume compression, which allows the gas to flow more smoothly as it turns and passes through the purge feature.

The lower end of the jet flow channel 5 is provided with a flow guide arc 10, and the flow guide arc 10 guides the air flow flowing downwards in the air inlet channel upwards to the jet flow channel 5.

Specifically, as shown in fig. 7, the top end of the circular guide arc 10 is a convex cone, the lower portion of the circular guide arc is two semicircles which are symmetrical with the cone as a center, the cone is aligned with the incoming flow direction of the air inlet channel, and the incoming flow is uniformly dispersed and enters the jet flow channel along the opposite direction of the semicircles. The interior purification unit 16 of jet pipeline comprises porous media such as active carbon, and the shape of shape laminating jet flow channel has certain thickness, guarantees that all gas all passes through the adsorption filtration material, and gas can not have the particulate matter concentration of remaining peculiar smell or not up to standard after purifying, and pressure and speed can satisfy the efflux requirement simultaneously.

The following describes the use of the embodiment in a specific application scenario of purifying cigarette smoke.

The air inlet is aligned to the cigarette end, the trapping distance is determined according to the preset air quantity of the drainage fan and the opening size of the flow dispersing port, and the distance between the air inlet and the cigarette is ensured to be smaller than the maximum trapping distance.

The flue gas that needs to purify and partly air mix and get into inlet channel through the air inlet, through the guide of drainage fan and water conservancy diversion bent pipe portion, get into second straight tube portion, the flue gas is in the convergent section, because volume compression, the pressure velocity of flow increases, makes like this that gas can flow more smoothly when turning to and passing the adsorption filter material, has promoted to turn to and filter effect.

After the flue gas flows out the inlet duct, by the guide circular arc guide, turn to along arc surface 180 and get into the jet flow passageway in, the flue gas reduces to the level that accords with the indoor environment requirement through filtering adsorption material purification back particulate matter concentration in the pipeline, and the peculiar smell is dispelled.

And one part of the clean gas passing through the adsorption filter material directly enters the room from the diffusion port, the clean gas with certain flow rate meeting the momentum ratio requirement is left as jet gas and continuously flows along the jet channel, part of the jet gas is guided to flow to other places in the pipe after meeting the flow guide plug, and finally all the jet gas flows to the area of the jet port which is not blocked and is ejected out from the jet outlet along the direction which forms an alpha angle with the air inlet direction along the inner arc section and the outer arc section.

When the position of the flue gas source to be captured is changed, the whole device does not need to be moved, only the second straight pipe part needs to be rotated, and the direction aligned with the first straight pipe part is adjusted.

The device of this implementation is opening and is stopping, in-process such as variable working condition, and inside gas flow is retrained by physical structure, and the direction is fixed, and only the flow of exhaust, efflux and scattered flow is variable, so the device can get into fast and maintain stable running state, and response speed is high.

The opening, the closing and the size of the diffusion port can be adjusted, the power of the drainage fan is controlled by combining a motor frequency conversion mode, the momentum ratio of jet flow and air suction (air inlet) is changed, and the effect of controlling the trapping distance and the range of air inlet is achieved.

Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The air purification device based on circular arc jet flow exhaust is characterized by comprising an inner pipe (14) and an outer pipe (4) sleeved outside the inner pipe (14), wherein an air inlet channel (6) is formed inside the inner pipe (14), a jet flow channel (5) is formed between the outer wall of the inner pipe (14) and the inner wall of the outer pipe (4), the upper end of the air inlet channel (6) is an air inlet (2) and used for sucking air to be purified, the lower end of the air inlet channel (6) is an outlet and communicated with the lower end of the jet flow channel (5), the upper end of the jet flow channel (5) is a jet flow outlet (1) and used for discharging purified air in a jet flow mode, the jet flow outlet (1) surrounds the outer ring of the air inlet (2) in the circumferential direction, so that purified air discharged from the jet flow outlet (1) forms a high-speed jet flow air curtain around the outer ring of the air to be purified sucked in the air inlet (2), a drainage fan (7) is arranged in the air inlet channel (6), and a purification component (16) is arranged in the jet flow channel (5).

2. The air purification device based on circular arc jet flow exhaust of claim 1, further comprising diffusing ports (8) distributed uniformly along the circumference for diffusing and exhausting purified air, wherein the diffusing ports (8) are arranged on the outer pipe (4) and located at the downstream of the purification component (16), and the opening degree of the diffusing ports (8) is adjustable.

3. The air purification device based on circular arc jet flow exhaust is characterized in that an inner arc section (13) and an outer arc section (12) which are in transitional connection are respectively formed between the jet flow outlet (1) and the inner pipe (14) and the outer pipe (4), and the radius of the inner arc section (13) is larger than that of the outer arc section (12).

4. Air cleaning device based on circular arc jet exhaust, according to claim 1 or 3, characterized in that the flow direction of the jet outlet (1) and the flow direction of the air inlet (2) form an angle α,80 ° < α < 90 °.

5. The air purification device based on circular arc jet exhaust air according to claim 1, characterized in that the inner pipe (14) and the outer pipe (4) are coaxially arranged, and are formed with a first straight pipe part (100) for aligning with a pollution source, a diversion elbow part (200) for connecting the first straight pipe part (100) and a second straight pipe part (300), and a second straight pipe part (300) for connecting with a supporting surface from top to bottom;

the drainage fan (7) is positioned at the position where the first straight pipe part (100) is connected with the diversion bent pipe part (200), and the purification part (16) is positioned at the second straight pipe part (300);

the purification component (16) is an adsorbing material.

6. The air purification device based on circular arc jet exhaust, according to claim 5, further comprising a diversion plug (3), wherein the diversion plug (3) is arranged in the jet channel (5) of the first straight pipe part (100) to block part of the jet outlet (1) below the air inlet (2), so that purified air is discharged from the jet outlets (1) above and at two sides of the air inlet (2).

7. The air purification device based on circular arc jet exhaust, according to claim 5, is characterized in that the profile of the flow guide plug (3) is matched with the profile of the jet channel (5) close to the jet outlet (1), and concave cambered surfaces (15) are respectively formed on two side surfaces of the flow guide plug (3).

8. The air purification device based on circular arc jet exhaust air according to claim 1, wherein the pipe section of the inner pipe (14) close to the outlet of the air inlet channel (6) is a tapered section (11), and the small-diameter end of the inner pipe is an outlet.

9. The air purification device based on circular arc jet flow exhaust is characterized in that the lower end of the jet flow channel (5) is provided with a flow guide circular arc (10), and the flow guide circular arc (10) guides the air flow flowing downwards in the air inlet channel upwards to the jet flow channel (5).