Air purification device based on circular arc jet exhaust

Abstract

The application relates to an air purification device based on circular-arc jet flow exhaust, which comprises an inner pipe and an outer pipe sleeved outside the inner pipe, the inner pipe is internally provided with an air inlet channel, a jet flow 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 for inhaling 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 flow channel, the upper end of the jet flow channel is a jet flow outlet for jet flow exhaust of purified air, the jet flow outlet is arranged around the outer ring of the air inlet in the circumferential direction, so that the purified air exhausted from the jet flow outlet is arranged around the outer ring of the air to be purified inhaled from the air inlet to form a high-speed jet flow air curtain, a flow guide fan is arranged in the air inlet channel, and a purification component and a diffusion port are arranged in the jet flow channel. The application can inhale polluted air flow from a diffusion source to an exhaust port at a long distance and purify the air flow, so as to directly capture the polluted air flow from a pollution source and purify the air flow.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and in particular to an air purification device based on arc jet exhaust. Background Technology

[0002] Current air purifiers employ a dilution ventilation strategy that purifies the entire space, failing to pinpoint the source of pollution, control the direction of airflow, and promptly remove it. This results in polluted airflow spreading throughout the space, requiring air purifiers to target and purify the entire area affected by the pollution. Existing research in air purification technology focuses primarily on purification methods and process optimization, without addressing the fundamental problem of dilution ventilation strategies. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an air purification device based on arc-shaped jet exhaust, which can draw polluted airflow from the emission source to the exhaust port and purify it from a distance, thereby achieving the purpose of directly capturing and purifying polluted airflow from the pollution source.

[0004] The technical solution adopted in this invention is as follows:

[0005] An air purification device based on arc-shaped jet exhaust includes an inner tube and an outer tube sleeved outside the inner tube. The inner tube forms an air intake channel, and the outer wall of the inner tube and the inner wall of the outer tube form a jet channel. The upper end of the air intake channel is an air inlet for drawing in air to be purified, and the lower end of the air intake channel is an outlet connected to the lower end of the jet channel. The upper end of the jet channel is a jet outlet for jetting out purified air. The jet outlet surrounds the outer ring of the air inlet in a circumferential direction, so that the purified air discharged from the jet outlet surrounds the outer ring of the air to be purified drawn in from the air inlet to form a high-speed jet air curtain. A duct fan is provided in the air intake channel, and a purification component is provided in the jet channel.

[0006] The further technical solution is as follows:

[0007] It also includes diffusers, which are evenly distributed along the circumference to diffuse and discharge the purified air. The diffusers are located on the outer pipe, downstream of the purification component, and the opening of the diffusers is adjustable.

[0008] The jet outlet is connected to the inner and outer tubes by an inner arc segment and an outer arc segment, respectively, with the radius of the inner arc segment being larger than that of the outer arc segment.

[0009] The flow direction of the jet outlet forms an angle α with the flow direction of the air inlet, where 80° < α < 90°.

[0010] The inner and outer pipes are coaxially arranged and are formed from top to bottom as follows: a first straight pipe section for aligning with the pollution source, a guide bend section for connecting the first and second straight pipe sections, and a second straight pipe section for connecting with the support surface.

[0011] The duct fan is located at the junction of the first straight pipe section and the guide bend section, and the purification component is located in the second straight pipe section;

[0012] The purification component is an adsorption material.

[0013] It also includes a flow guide plug, which is disposed in the jet channel located in the first straight pipe section, blocking part of the jet outlet located below the air inlet, so that the purified air is discharged from the jet outlet located above and on both sides of the air inlet.

[0014] The profile of the flow guide plug matches the profile of the jet channel near the jet outlet, and the two sides of the flow guide plug are respectively formed with concave arc surfaces.

[0015] The section of the inner tube near the air intake channel outlet is a tapering section, with its smaller diameter end being the outlet.

[0016] The lower end of the jet channel is provided with a guide arc, which guides the downward-flowing airflow in the intake channel upward to the jet channel.

[0017] The beneficial effects of this invention are as follows:

[0018] This invention can draw polluted airflow from its emission source to the exhaust port and purify it over a considerable distance, achieving the goal of directly capturing and purifying polluted airflow from the pollution source. The integrated intake and jet design results in high gas utilization, low energy consumption, and a lower required intake flow rate than ordinary air purifiers. It enables the capture of polluted airflow over a considerable distance with low flow rate, low noise, and low energy consumption, ensuring effective purification of indoor pollution and improving indoor air quality (IAQ), demonstrating promising application prospects.

[0019] This invention can adjust the opening and closing and size of the diffuser, combined with the frequency conversion of the motor to control the power of the induced draft fan, thereby changing the momentum ratio of the jet and the intake (air intake) to achieve the effect of adjusting the capture distance and range of the intake air.

[0020] This invention avoids the influence of vortices at the corner between the jet channel and the jet outlet, reduces turbulence intensity, reduces flow resistance and noise, effectively reduces pressure loss during the jet process, optimizes the flow field, and further increases the collection distance.

[0021] This invention increases the airflow velocity and pressure at the intake channel outlet by setting a tapering section, preparing for the turning process, reducing losses during the exhaust jet turning process, and effectively preventing backflow.

[0022] This invention incorporates a flow guide plug to suit applications placed on a workbench, ensuring that the jet outlet is located only above and to the sides of the intake port, preventing jetting downwards onto the workbench and avoiding the impact of the workbench's isolation effect on the jet. Simultaneously, the flow guide arc on the side of the flow guide plug effectively reduces pressure loss and flow turbulence when the lower jet gas changes direction and flows upwards within the pipe.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (the purification component is not shown).

[0025] Figure 2 This is a schematic diagram of the diffuser structure according to an embodiment of the present invention.

[0026] Figure 3 This is a cross-sectional view of the air inlet and jet outlet according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the installation structure of the flow guide plug according to an embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the flow guide plug according to an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the installation structure of the purification component according to an embodiment of the present invention.

[0030] Figure 7 for Figure 6 A schematic diagram of its longitudinal section.

[0031] In the diagram: 1. Jet outlet; 2. Air inlet; 3. Flow guide plug; 4. Outer pipe; 5. Jet channel; 6. Air inlet channel; 7. Drainage fan; 8. Diffuser; 10. Flow guide arc; 11. Gradient section; 12. Outer arc section; 13. Inner arc section; 14. Inner pipe; 15. Concave arc surface; 16. Purification component; 100. First straight pipe section; 300. Second straight pipe section; 200. Flow guide bend section. Detailed Implementation

[0032] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0033] like Figure 1As shown, the air purification device based on arc-shaped jet exhaust in this embodiment includes an inner tube 14 and an outer tube 4 sleeved outside the inner tube 14. The inner tube 14 forms an air intake channel 6, and the outer wall of the inner tube 14 and the inner wall of the outer tube 4 form a jet channel 5. The upper end of the air intake channel 6 is an air inlet 2 for drawing in air to be purified, and the lower end of the air intake channel 6 is an outlet connected to the lower end of the jet channel 5. The upper end of the jet channel 5 is a jet outlet 1 for jetting out purified air. The jet outlet 1 surrounds the outer ring of the air inlet 2 in a circumferential direction, so that the purified air discharged from the jet outlet 1 surrounds the outer ring of the air to be purified drawn in from the air inlet 2 to form an air curtain. A duct fan 7 is provided in the air intake channel 6, and a purification component 16 is provided in the jet channel 5. The installation structure of the purification component 16 is described in [reference needed]. Figure 6 and Figure 7 .

[0034] The air purification device based on arc-shaped jet exhaust in the above embodiment operates by using a guide fan 7 to draw polluted airflow from the emission source into the intake channel 6 through the intake port 2. The polluted airflow then flows from the outlet of the intake channel 6, turns around via a guide arc, and flows into the jet channel 5. After being purified by the purification component 16, it is finally discharged from the jet outlet 1. The purification component 16 can be an adsorption filter material, which combines porous filter material and activated carbon in a ring structure. Installed in the jet channel, it can be used for filtration and adsorption, both removing odors and filtering out particulate matter.

[0035] The air purification device based on arc-shaped jet exhaust in the above embodiment utilizes a high-speed jet curtain formed by the arc-shaped jet exhaust surrounding the air inlet 2, which isolates the gas outside the air inlet within a certain range, creating a trapping effect on polluted air and significantly improving the suction efficiency and distance. This allows for the direct extraction and purification of polluted airflow from the pollution source over a greater distance, achieving the goal of directly eliminating polluted airflow from the source. By guiding the polluted airflow to the jet channel for filtration and purification, it is used as jet gas. This means that only one fan is needed to achieve both exhaust and jet processes, integrating the exhaust and jet processes into one unit. This significantly increases gas utilization, as the entire device only requires one fan as a power source, improving the energy utilization rate of the guiding fan. Compared to ordinary exhaust hoods that require additional jet fans, this method significantly saves energy, achieving energy conservation and emission reduction, and improving the economic efficiency and effectiveness of the device. It overcomes the shortcomings of existing capture methods, such as high energy consumption, high material consumption, and the need for re-collection of jet gas. Furthermore, it requires a lower airflow rate than ordinary air purifiers, making it suitable for capturing polluted airflow over long distances with low flow, low noise, and low energy consumption.

[0036] like Figure 2As shown, the air purification device based on arc jet exhaust in the above embodiment also includes a diffuser 8, which is evenly distributed along the circumference and used to diffuse and discharge the purified air. The diffuser 8 is set on the outer pipe 4 and is located downstream of the purification component 16. The opening of the diffuser 8 is adjustable.

[0037] The adjustable opening of the diffuser can be specifically designed using a louvered structure, such as... Figure 2 As shown, four symmetrical diffuser louver units are arranged along the circumference of the outer tube. Each unit has six diffuser ports with a maximum opening width of 4mm. Each diffuser port is equipped with louvers, and the opening and closing size of the louvers can be adjusted to regulate the diffused airflow.

[0038] The diffuser serves to balance gas flow and pressure, enabling the capture of contaminated air at different distances and ranges. A portion of the purified air is discharged through the diffuser, while the remainder exits through the jet outlet. Since the total flow remains constant, adjusting the diffuser flow rate alters the jet flow rate, thereby affecting the jet momentum ratio and controlling the intake range and distance. Because the momentum of the exhaust jet differs from that of the intake jet, their momentum ratio affects the intake distance, range, and efficiency; the intake flow rate also influences these parameters. The intake and jet flow rates can be synergistically altered by adjusting the power of the induced draft fan 7 and the opening / closing size of the diffuser 8, thus capturing contaminated air at different distances and ranges.

[0039] like Figure 3 As shown, the jet outlet 1 is connected to the inner pipe 14 and the outer pipe 4 by transitional inner arc segments 13 and 12, respectively, with the radius of the inner arc segment 13 being larger than that of the outer arc segment 12. That is, the jet outlet is achieved by turning the inner and outer pipe openings outward into inner and outer arc segments, respectively. It can be understood that the air inlet 2 is essentially an outwardly flared arc-shaped opening of the inner pipe opening. The arc transition increases the size of the air inlet, creating a transition between the air inlet and the air intake channel, thus reducing exhaust resistance.

[0040] The flow direction of the jet outlet 1 and the flow direction of the air inlet 2 form a relationship like... Figure 3 The angle α shown is 80° < α < 90°.

[0041] The aforementioned angle setting prevents the high turbulence and flow disorder caused by the jet outlet and jet channel being at a 90° angle. It significantly reduces jet pressure loss, resistance and noise, improves jet effect, ensures that the jet will not be entrained by the airflow and affect the air intake efficiency, and thus better isolates air outside the air intake range. It also reduces the air intake range to a certain extent and increases the air intake capture distance, enabling targeted removal of pollutants from the pollution source at a greater distance.

[0042] See Figure 1The inner pipe 14 and outer pipe 4 are coaxially arranged, with parallel and opposite airflow phases inside. The overall structure, from top to bottom, forms a first straight pipe section 100 for aligning with the pollution source, a guide bend section 200 for connecting the first straight pipe section 100 and the second straight pipe section 300, and a second straight pipe section 300 for connecting to the support surface. The exhaust fan 7 is located at the junction of the first straight pipe section 100 and the guide bend section 200, and the purification component 16 is located in the second straight pipe section 300. When the location of the pollution source changes, it is not necessary to move the entire device; only the first straight pipe section needs to be rotated to adjust the direction of the air inlet, and then the collection distance can be adjusted according to the distance from the air inlet to the pollution source. The exhaust fan power and the size of the diffuser louvers can be changed to adjust to a suitable jet velocity ratio. When the device is shaken or vibrated, apart from some fluctuations in airflow, the airflow lines are still constrained by the physical structure of the device and will not change significantly or even reverse. Compared with traditional air purifiers, it operates more stably and can quickly and specifically remove and purify pollutants, rather than improving air quality through dilution. It is significantly more efficient and saves more energy.

[0043] like Figure 4 As shown, the air purification device based on arc jet exhaust in the above embodiment also includes a guide plug 3. The guide plug 3 is disposed in the jet channel 5 located in the first straight pipe 100, blocking part of the jet outlet 1 located below the air inlet 2, so that the purified air is discharged from the jet outlet 1 located above and on both sides of the air inlet 2.

[0044] like Figure 5 As shown, the outline of the guide plug 3 matches the outline of the jet outlet 1 and the jet channel 5 near the jet outlet 1, and the two sides of the guide plug 3 are respectively formed with concave arc surfaces 15.

[0045] Specifically, the function of the guide plug is to prevent the jet outlet from circumferentially surrounding the air inlet 360°, instead ensuring that the jet exits only from the top and sides of the air inlet. By changing the circumferential dimensions of the guide plug, a 90° circumferential area below the air inlet can be blocked, meaning the jet outlet exits only from a 270° circumferential area above the air inlet. This is to prevent the jet from impacting people or other objects if the device is installed low. For example, in applications where the device is placed on a workbench, ensuring the jet outlet is only located above and to the sides of the air inlet prevents the jet from hitting the workbench, thus solving the problem of poor flow inside the pipe caused by the jet impacting the workbench surface. The concave arc surface 15 allows the lower jet gas to flow upwards along its surface, ensuring the jet does not exit from the area blocked by the guide plug, while reducing losses from the lower jet changing direction upwards and the problem of poor flow inside the pipe caused by non-full-angle jets, greatly improving the exhaust effect.

[0046] like Figure 6 and Figure 7 As shown, the section of the inner tube 14 near the outlet of the air intake channel 6 is a tapered section 11, with its smaller diameter end serving as the outlet. Within the tapered section 11, the airflow experiences increased pressure and velocity due to volume compression, allowing the gas to flow more smoothly as it turns and passes through the purification components.

[0047] The lower end of the jet channel 5 is provided with a guide arc 10, which guides the downward airflow in the intake channel upward to the jet channel 5.

[0048] Specifically, such as Figure 7 As shown, the top of the guide arc 10 is a convex cone, and the lower part consists of two symmetrical semicircles centered on the cone. The cone is aligned with the incoming flow direction of the air inlet channel, evenly dispersing the incoming flow so that it enters the jet channel in the opposite direction along the semicircles. The purification component 16 inside the jet pipe is composed of porous media such as activated carbon. Its shape conforms to the shape of the jet channel and has a certain thickness to ensure that all gas passes through the adsorption filter material. After purification, the gas will not have residual odor or substandard particulate matter concentration, while the pressure and velocity can meet the jet requirements.

[0049] The following describes the usage process of this embodiment in the specific application scenario of purifying cigarette smoke.

[0050] Aim the air inlet at the cigarette butt, and determine the collection distance based on the preset airflow of the duct fan and the size of the diffuser opening, ensuring that the distance between the air inlet and the cigarette is less than the maximum collection distance.

[0051] The flue gas that needs to be purified is mixed with a portion of the air and enters the intake channel through the air inlet. Guided by the induced flow fan and the guide bend, it enters the second straight pipe section. In the converging section, the flue gas is compressed in volume, and the pressure and flow rate increase. This allows the gas to flow more smoothly when turning and passing through the adsorption filter material, thus improving the turning and filtration effect.

[0052] After the flue gas exits the intake pipe, it is guided by the flow-guiding arc and turns 180° along the arc surface to enter the jet channel. After the flue gas is purified by the filter adsorption material in the pipe, the particulate matter concentration is reduced to a level that meets the requirements of the indoor environment, and the odor is removed.

[0053] After passing through the adsorption filter material, part of the clean gas will enter the room directly from the diffuser. The remaining clean gas, which meets the momentum ratio requirement, will flow as jet gas along the jet channel. Some of the jet gas will be guided to other places in the pipe after encountering the guide plug. Finally, all the jet gas will flow to the unblocked jet port area and be ejected from the jet outlet along the inner and outer arc sections at an angle α to the inlet direction.

[0054] When the location of the flue gas source to be captured changes, it is not necessary to move the entire device; simply rotate the second straight pipe section and adjust the direction in which the first straight pipe section is aligned.

[0055] During start-up, shutdown, and changes in operating conditions, the internal gas flow of this device is constrained by the physical structure and its direction is fixed. Only the flow rates of exhaust, jet, and diffuser are variable. Therefore, the device can quickly enter and maintain a stable operating state with a high response speed.

[0056] The diffuser can be adjusted in terms of opening, closing, and size. Combined with the frequency conversion of the motor to control the power of the induced draft fan, the momentum ratio of the jet and the intake (air intake) is changed, thereby achieving the effect of controlling the capture distance and range of the intake air.

[0057] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air purification device based on arc-shaped jet exhaust, characterized in that, The system includes an inner tube (14) and an outer tube (4) sleeved outside the inner tube (14). The inner tube (14) forms an air intake channel (6), and the outer wall of the inner tube (14) and the inner wall of the outer tube (4) form a jet channel (5). The upper end of the air intake channel (6) is an air inlet (2) for drawing in air to be purified, and the lower end of the air intake channel (6) is an outlet connected to the lower end of the jet channel (5). The lower end of the jet channel (5) is provided with a guide arc (10). The downward-flowing airflow in the air intake channel is guided upward to the jet channel (5). The upper end of the jet channel (5) is the jet outlet (1), which is used to jet out the purified air. The jet outlet (1) surrounds the outer ring of the air intake (2) in the circumferential direction, so that the purified air discharged from the jet outlet (1) surrounds the outer ring of the air to be purified drawn in from the air intake (2) to form a high-speed jet air curtain. The air intake channel (6) is provided with a duct fan (7), and the jet channel (5) is provided with a purification component (16). The purification component (16) has a ring structure; It also includes diffusers (8), which are evenly distributed along the circumference and used to diffuse and discharge the purified air. The diffusers (8) are set on the outer pipe (4) and located downstream of the purification component (16). The opening of the diffusers (8) is adjustable. The jet outlet (1) forms an inner arc segment (13) and an outer arc segment (12) that are respectively connected to the inner tube (14) and the outer tube (4). The radius of the inner arc segment (13) is greater than the radius of the outer arc segment (12).

2. The air purification device based on arc jet exhaust according to claim 1, characterized in that, The flow direction of the jet outlet (1) and the flow direction of the air inlet (2) form an angle α, where 80° < α < 90°.

3. The air purification device based on arc jet exhaust according to claim 1, characterized in that, The inner tube (14) and the outer tube (4) are coaxially arranged, and from top to bottom are formed a first straight tube section (100) for aligning with the pollution source, a guide bend section (200) for connecting the first straight tube section (100) and the second straight tube section (300), and a second straight tube section (300) for connecting with the support surface. The duct fan (7) is located at the junction of the first straight pipe section (100) and the duct bend section (200), and the purification component (16) is located in the second straight pipe section (300). The purification component (16) is an adsorption material.

4. The air purification device based on arc jet exhaust according to claim 3, characterized in that, It also includes a flow guide plug (3), which is disposed in the jet channel (5) located in the first straight pipe section (100) to block part of the jet outlet (1) located below the air inlet (2), so that the purified air is discharged from the jet outlet (1) located above and on both sides of the air inlet (2).

5. The air purification device based on arc jet exhaust according to claim 4, characterized in that, The outline of the guide plug (3) matches the outline of the jet channel (5) near the jet outlet (1), and the two sides of the guide plug (3) are respectively formed with concave arc surfaces (15).

6. The air purification device based on arc jet exhaust according to claim 1, characterized in that, The section of the inner tube (14) near the outlet of the air intake channel (6) is a tapered section (11), and its small diameter end is the outlet.

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