Negative ion subway air freshening purifier

Abstract

A rectangular box body is internally divided into three cavities, the middle cavity is a fan bin for installing a fan, the cavities on the two sides are anion bins for installing anion generators, an air pipe of the fan is communicated with the anion bins on the two sides, and the anion bins on the two sides are respectively provided with radiators emitting reverse airflow. The negative ion generator has the beneficial effects that negative ion airflow is reversely emitted from the two sides, the coverage is wide, the negative ion airflow intersects with each other, and air masses which continuously move and are not prone to drifting can be formed. In addition, an intermittent pressurization deflation mechanism and a cyclone mechanism are adopted, so that airflow with high pressure intensity, small flow and high anion concentration is obtained. A relative installation technology is further adopted, high-concentration negative oxygen ion circulation is formed in the subway station, the problems that the negative oxygen ions drift away along with wind and the concentration is not prone to accumulation are solved, the capacity of killing germs, viruses and various pollutants is remarkably improved, and the subway station negative oxygen ion air purifier has the advantages of being low in cost, convenient to use, safe, reliable and the like. The device is expected to be a preferred device for purifying and upgrading subway air.

Description

Technical Field

[0001] This utility model relates to an environmental protection facility, namely a negative ion subway air freshener and purifier. Background Technology

[0002] In recent years, subway systems in large and medium-sized cities have developed rapidly, playing a significant role in alleviating urban traffic congestion. However, subways, with their dense populations, are high-risk environments for cross-infection of various germs, viruses, and pollutants. To address this issue, the government has adopted several measures, the most important of which is supplying large quantities of clean air into subway stations. However, due to the massive flow of people, germs, viruses, and other pollutants are continuously brought into the subways. Although these pollutants can be expelled by fresh air, they can still cause harm during their flow. Therefore, in addition to strengthening ventilation, it is also necessary to kill germs, viruses, and various pollutants in the subway air to solve the problem of subway air pollution at its source.

[0003] With current technology, there are many techniques for eliminating germs, viruses, and pollutants, such as various disinfectants and ultraviolet light. However, most of these substances are harmful to the human body and cannot be used. In this context, negative ion technology demonstrates its unique advantages. Common sense tells us that negative ions can eliminate germs, viruses, and pollutants in the air, and can also enter the human body, making people feel comfortable, improving bodily functions, and preventing various diseases. Therefore, it should be an essential facility in subway stations. However, the conditions for negative ions to function are also very demanding. According to relevant data, a negative ion concentration of 20,000 per cubic centimeter is required. 3 Only in these ways can bacteria, viruses, and pollutants be eliminated. However, due to numerous technical problems and cost limitations, existing negative ion devices are still unable to achieve this goal. Therefore, to utilize negative ion technology to purify the air in subways, the negative ion devices themselves must first be improved.

[0004] The existing negative ion generators urgently need improvement in the following aspects: First, most negative ion generators have only one air outlet, emitting air in only one direction. This unidirectional airflow not only has a small coverage area but also cannot form a continuously moving air mass through cross-collision; the linearly moving airflow is quickly diluted and dispersed by the ambient airflow. Second, the output airflow is too weak, making it difficult to move; the airflow is often dispersed by the ambient airflow before reaching the set location, making it difficult to accumulate a high concentration. Third, although increasing the intensity of the output airflow is not difficult, increasing the airflow inevitably increases the gas flow rate, which reduces the concentration of negative ions in the airflow, contradicting the goal of increasing the concentration of negative ions. Of course, if the number of negative ions generated is increased while increasing the airflow, and sufficient equipment is installed, the negative ion concentration in the subway can indeed meet the standards, but this would then lead to the aforementioned cost issues.

[0005] It is evident that to purify subway air using negative ions, improvements are needed to enable negative ion generators to emit multi-directional, cross-flowing air currents, forming air masses that last for a longer period. Furthermore, it is required that, while maintaining low cost, the emitted negative ion airflow simultaneously possess strong wind force, low flow rate, and high plasma concentration. Clearly, this is a contradictory problem. Summary of the Invention

[0006] The purpose of this invention is to provide a negative ion subway air purifier that can output multi-directional cross airflow to form a continuously active air mass, and has high output airflow pressure, low flow rate, and high negative ion concentration.

[0007] The above objective is achieved by the following technical solution: a negative ion subway air purifier, characterized in that: the air purifier has a rectangular box, the box is divided into three cavities by two partitions, the middle cavity is a fan chamber, the two side cavities are negative ion chambers, the fan chamber is equipped with a fan, the fan duct is connected to the negative ion chambers on both sides, the air inlet of the fan chamber is equipped with a filter screen, the negative ion chambers on both sides are equipped with negative ion generators, and the negative ion chambers on both sides are respectively equipped with radiators that emit reverse airflow.

[0008] The radiator has guide vanes mounted on the opening of the negative ion chamber via a vertical rotating shaft. The rotating shaft, driven by a motor, causes the guide vanes to swing in the opposite direction.

[0009] The surface of the flow guide plate is coated with a fullerene coating.

[0010] A pressure regulating valve is installed at one end of the air duct that enters the negative ion chamber.

[0011] The constant pressure valve has a valve plate mounted on its valve port via a rotating shaft. The valve plate closes the valve port under the action of a tension spring. When the pressure of the gas in the duct relative to the valve plate is greater than the tension of the tension spring, the valve plate opens and releases high-pressure gas. Subsequently, the valve plate returns to its original position under the pull of the tension spring, closing the valve port.

[0012] The radiator is a tapered tube, thicker at the front and thinner at the back, installed inside the negative ion chamber. The small end of the tapered tube is connected to the pressure valve at the front end of the air duct, and the large end of the tapered tube is opposite to the negative ion generator.

[0013] The conical tube or conical tube and air duct are provided with spiral blades.

[0014] The spiral blade has a helix angle ≥ 60° and the number of spiral blade heads ≥ 2.

[0015] The air fresheners are installed in pairs inside the subway station.

[0016] The two sets of air purifiers in one group are installed above the entrance doors on the left and right sides of the subway station, and / or the two sets of air purifiers in another group are installed on the pillars or walls of the subway station, forming a square array of four air purifiers in two groups.

[0017] The air freshener was installed inside the subway car.

[0018] The front of the wind turbine housing is equipped with an electronic display screen, which includes a time display window, an air quality display window, and an advertising window.

[0019] The electronic display screen works in conjunction with the remote control system. The remote control system processes the data collected by the negative ion concentration detection sensor and the particulate pollutant detection sensor, as well as the graphic information of the promotional advertisements, and converts them into a digital remote control program to remotely control the air purifier and the electronic display screen.

[0020] The beneficial effects are as follows: The negative ion airflow of this device is emitted from both sides in opposite directions, covering a wide area and intersecting with each other, forming a continuously moving air mass that is not easily dispersed. In addition, the use of an intermittent pressurization and cyclone mechanism achieves a high-pressure, low-flow-rate airflow with a high concentration of negative ions. Furthermore, the adoption of relative installation technology enables the formation of a high-concentration negative oxygen ion circulation within subway stations, solving the problem of negative oxygen ions being dispersed by the wind and difficult to accumulate. This significantly improves the ability to kill bacteria, viruses, and various pollutants. It also features low cost, ease of use, and safety and reliability, making it a promising candidate for improving air quality in subways. Attached Figure Description

[0021] Figure 1 This is the front view of the first embodiment;

[0022] Figure 2 This is a top view of the first embodiment;

[0023] Figure 3 This is a top view of the cam drive component in the first embodiment;

[0024] Figure 4 This is a partial top view of the negative ion wide-angle radiation state in the first embodiment;

[0025] Figure 5 This is a partial top view of the negative ion inner angle radiation state in the first embodiment;

[0026] Figure 6 This is an enlarged front view of the guide vane of the first embodiment;

[0027] Figure 7 This is an enlarged left view of the guide vane of the first embodiment;

[0028] Figure 8 This is a front view of the pressure regulating valve in the closed state of the second embodiment;

[0029] Figure 9 This is a front view of the pressure regulating valve in the second embodiment in its open state;

[0030] Figure 10 This is a front view of the tapered tube component in the third embodiment;

[0031] Figure 11 This is a top view of the third embodiment;

[0032] Figure 12 This is a top view of the installation structure of the fourth embodiment;

[0033] Figure 13 This is a top view of the installation structure of the fifth embodiment;

[0034] Figure 14 This is a top view of the installation structure of the sixth embodiment;

[0035] Figure 15 This is a structural diagram of the subway car according to the seventh embodiment;

[0036] Figure 16 This is the front view of the eighth embodiment;

[0037] Figure 17 This is a top view of the eighth embodiment;

[0038] Figure 18 This is a block diagram of remote control in the eighth embodiment.

[0039] The diagram shows: 1. Air purifier; 2. Housing; 3. Negative ion chamber; 4. Fan chamber; 5. Fan; 6. Air duct; 7. Negative ion generator; 8. Radiator; 9. Guide vane; 10. Shaft; 11. Motor; 12. Filter screen; 13. Front baffle; 14. Motor output wheel; 15. Cam; 16. Return spring; 17. Fullerene coating; 18. Pressure regulating valve; 19. Valve port; 20. Tension spring; 21. Valve plate; 22. Conical tube; 23. Spiral blade; 24. Car door entrance; 25. Vertical wall; 26. Subway car; 27. Electronic display screen; 28. Time display window; 29. ​​Air quality display window; 30. Advertising window. Detailed Implementation

[0040] First embodiment: Figure 1 , Figure 2This paper introduces a negative ion subway air purifier, characterized by the following features: The air purifier 1 has a rectangular box 2, which is divided into three cavities by two partitions. The two side cavities are negative ion chambers 3, and the middle cavity is a fan chamber 4. A fan 5 is installed inside the fan chamber, and the fan's duct 6 connects to the two side negative ion chambers. A filter 12 is installed on the air inlet of the fan chamber. Negative ion generators 7 are installed in both side negative ion chambers, and radiators 8 emitting reverse airflow are conveniently installed on the openings of the side negative ion chambers.

[0041] Because the negative ion chambers are located on both sides of the enclosure, the negative ion airflow is emitted from both sides in opposite directions. This not only increases the area covered by the airflow, but the intersecting airflows also create a continuously circulating air mass. This air mass is not easily dispersed by the ambient airflow, its existence time is greatly extended, and its effect on breaking down bacteria, viruses, and various pollutants is significantly improved.

[0042] Here, the air inlet of the fan compartment can face forward or to another side. When installed on a flat wall, facing forward is more convenient. In this case, a front baffle 13 should be installed in front of the air inlet filter. The left and right sides of the front baffle should ideally be sealed, leaving only gaps at the top and bottom for air intake. Moreover, the height of the front baffle should be higher than the height of the side outlets to prevent the gas discharged from the outlets from being drawn back by the fan.

[0043] Furthermore, the radiator 8 has various structures, one of which is shown in the figure. That is, multiple long strip-shaped guide vanes 9 are mounted on the opening of the negative ion chamber 3 via a vertical rotating shaft 10, and the rotating shaft drives the guide vanes to swing under the drive of a micro motor 11.

[0044] Various transmission methods can be used between the motor and the shaft. Figure 3 A relatively simple cam mechanism is illustrated in the figure. As shown, both the motor output wheel 14 and the guide vane shaft 10 are equipped with cams 15, and a return spring 16 is also mounted on the guide vane shaft 10. When the motor is started, the motor output wheel rotates. When the two cams contact each other, the shaft rotates, causing the guide vane to swing. When the two cams disengage, the shaft, under the action of the return spring, slowly returns the guide vane to its original position. In this way, the guide vane can repeatedly swing within a set angle.

[0045] like Figure 4 As shown, when the leading edge of the guide vane swings outward, the angle at which the negative oxygen ion airflow emitted through the emission port diffuses outward gradually increases. This configuration can be chosen in situations with limited space and low wind speeds to expand the coverage area of ​​the negative ion airflow.

[0046] For example Figure 5As shown, when the front edge of the air guide plate swings inward, the emitted negative ion airflow crosses, and the colliding airflows form an air mass. This working state is particularly suitable for air purification operations in large spaces such as subway stations. During use, the motor can be stopped at this angle to allow the negative ion airflow emitted from both sides to circulate fully. Observations using the method of sprinkling light fluff into the airflow have demonstrated that, compared to unidirectional linear airflow, the air mass formed by this reverse airflow is better able to withstand the impact of ambient airflow, lasts longer, has a higher concentration of negative ions, and provides a better air purification effect.

[0047] According to tests conducted by the Shanghai Institute of Metrology and Testing Technology, the East China National Metrology and Testing Center, and the Shanghai Testing Center of China, a set of air supply units with a capacity of 450 m³ / h... 3 An air purifier with a capacity of / h, achieving a negative ion concentration of 2×10⁶ ions at 30cm from the air outlet. 7 pcs / cm 3 Put it in 30 3 Inside the test chamber, the negative ion concentration reached 1.5 × 10⁻⁶ ions five minutes after the machine was turned on. 5 pcs / cm 3 .

[0048] According to experiments, when the air purifier is installed above the subway car entrance, the resulting air mass can continuously purify the air in an area of ​​approximately 75 cubic meters, which is 5 meters long, 5 meters wide, and 3 meters high.

[0049] The purification results obtained from a partial space simulation experiment inside a subway station are shown in the table below:

[0050]

[0051] It is evident that the air purifier is highly effective.

[0052] Based on this, the structure of the guide vane was improved, such as... Figure 6 , Figure 7 As shown, a fullerene coating is applied to the surface of the guide plate to form a fullerene coating 17. Fullerene is the third allotrope of elemental carbon, and it is currently being mass-produced in my country. According to relevant data, fullerene, as a corona tip material in negative ion generators, can generate a large number of small-particle negative ions. Fullerene in the environment also has the ability to generate negative ions. Experiments have shown that when it is coated on the surface of the guide plate with a thickness of about 0.1 mm, it can generate 800-1000 negative ions / cm3s without the generator being turned on. After the generator is turned on, due to the high voltage difference of the negative ion generator, the negative ion output of fullerene can increase to 1500-2000 ions / cm3s. In addition, the negative ion attenuation caused by friction of the guide plate is also significantly reduced to a negligible level.

[0053] The second embodiment: Based on the aforementioned embodiments, the structure of the duct is improved. For example... Figure 8 As shown, a constant pressure valve 18 is installed at the end of the air duct 6 of the fan 5 that enters the negative ion chamber.

[0054] The pressure regulating valve mentioned here is a valve that can only open under a set pressure. Pressure regulating valves are commercially available products with various structures. The diagram only illustrates a simple pressure regulating valve. This type of valve has a tubular body with a valve port 19 at the front end. A valve plate 21 is hinged to the outside of the valve port. The valve plate closes the valve port under the action of a tension spring 20. The tension of the tension spring is adjustable; in this example, the tension should be selected so that the valve plate opens at a pressure of 1.5 atmospheres or higher.

[0055] Normally, such as Figure 8 As shown, the valve is in the closed state. During operation, the fan starts, and the negative ion generator begins to release negative ions. These negative ions capture oxygen around the generator to form negative oxygen ions. However, due to the low air pressure inside the duct, the valve has not yet opened, the airflow is not released, and the negative oxygen ions do not gain kinetic energy for transition, thus accumulating only within the negative ion chamber. When the air pressure inside the duct increases to the set value, the thrust received by the valve exceeds the tension of the spring, i.e.... Figure 9 As shown, the valve opens, and high-pressure gas rushes out, carrying negative oxygen ions out of the negative ion chamber. Subsequently, the air pressure inside the pipe drops rapidly, and the valve returns to its original position under the pull of the tension spring, closing the valve port and starting the next cycle.

[0056] Experiments have shown that this working method effectively solves the problem of reduced negative oxygen ion concentration caused by large air volume. As mentioned earlier, existing technologies require high-power fans to continuously deliver high-pressure, strong airflow to increase the migration distance of negative oxygen ions. This increases air volume and reduces negative ion concentration. This example uses a small-volume fan, accumulating air pressure to achieve the same level, and then releasing it suddenly at the same flow rate. Compared to continuous exhaust, this intermittently discharged gas significantly reduces the amount of gas, increases the operating speed, and significantly increases the negative ion concentration. Using a valve opening time to closing time ratio of 1:3 (3 seconds closed, 1 second open), the ratio of the exhaust time of this device to the continuous exhaust time of the high-power fan is 1:(1+3) = 1:4. It can be deduced that the ratio of the gas discharge volumes is also 1:4. Similarly, it can be deduced that the number of negative oxygen ions blown by this device each time it releases air is equal to the number of negative ions discharged by the original high-power fan for four times the duration. In other words, compared to continuous exhaust by the high-power fan, the negative ion concentration in each open airflow of this device increases fourfold. In practice, this ratio can reach more than 1:10, and the concentration of negative ions can increase more than 10 times.

[0057] To verify the accuracy of the above calculations, a closed-box experiment was conducted in 2023. A 10m...3 The sealed enclosure contains a built-in negative ion concentration sensor and pressure gauge. The on / off time ratio of the unit was adjusted to 1:3, and two fans with a flow ratio of 1:4 were selected. The unit was equipped with a low-flow fan, while a similarly sized negative ion air purifier without a pressure regulating valve was fitted with a high-flow fan. Both units were placed in the sealed enclosure, and the enclosure was evacuated to a vacuum level of over 90%. After powering on, the negative ion concentration at different pressures was recorded.

[0058] The results are recorded as follows:

[0059]

[0060]

[0061] As shown in the table above, the value is highly consistent with the theoretical calculation results. This indicates that this intermittent pressurization and decompression method effectively solves the contradiction between small air volume, high air pressure, and high negative ion concentration, making it a feasible technical solution.

[0062] In addition, this pressure-regulating valve is installed at the back of the negative ion generator to ensure the smooth path of negative oxygen ion radiation and to avoid the attenuation of negative oxygen ions due to collisions and friction.

[0063] Furthermore, a tapered tube 22, wider at the front and narrower at the back, is installed in front of the pressure regulating valve, with the front end of the tapered tube facing the negative ion generator 7. This tapered tube allows the high-pressure airflow to radiate outwards, not only pushing out all the negative oxygen ions in the negative ion chamber but also expanding the diffusion range. It is evident that this tapered tube functions very similarly to the guide vane in the first embodiment, representing another structural form of the radiator 8. However, these two parallel structures do not necessarily require one to be used; they can be used in combination. However, when using the tapered tube, the number of guide vanes can be reduced, especially the guide vane inside the opening of the negative ion chamber, which can be completely omitted.

[0064] The third embodiment: Based on the aforementioned embodiments, the structure of the tapered tube 22 is optimized. For example... Figure 10 As shown, the tapered tube 22 is provided with a spiral blade 23. The function of the spiral blade is to make the high-pressure airflow from the constant pressure valve form a rotating airflow.

[0065] To demonstrate that rotating airflow performs better than straight airflow, this study conducted a fluff test: Two fans of the same specifications were used, one with a standard duct and the other with a duct equipped with spiral blades. Equal amounts of soft fluff were placed at the outlets of both types of negative ion generators. After powering on, observation under light showed that the fluff in the rotating airflow traveled faster than that in the straight airflow and was less likely to disperse. When the straight-flowing fluff reached 4.2m, it completely dispersed. At this point, the rotating airflow had reached 5.1m and had not dispersed. It only began to disperse after continuing to fly to 5.8m. From the above data, we can conclude that the velocity increase of the rotating airflow compared to the straight airflow is (5.1-4.2) / 4.2 = 21.4%, and the transition distance increase is (5.8-4.2) / 4.2 = 38.1%.

[0066] It is evident that rotating airflow does not easily dissipate and can remain for a longer period. Once emitted, it can pass through the ambient air at a faster speed and migrate to a farther location. Furthermore, it maintains a high concentration of negative oxygen ions for an extended period, resulting in better air quality improvement and purification.

[0067] Further experiments demonstrated that a spiral vane with an elevation angle ≥60° and a vane head ≥2 can produce a relatively ideal rotating airflow. Field measurements showed that using this type of spiral vane, the resulting rotating wind force can maintain a high concentration of negative ions over a considerable distance. The results are shown in the table below:

[0068]

[0069] Currently, subway station widths are mostly between 8 and 14 meters. As shown in the table above, for an 8-meter wide station, this device can completely cover it, and the negative ion concentration at the very end still meets the requirements. For a 14-meter wide subway station, installing this device on both sides will result in an even higher negative ion concentration in the overlapping coverage area.

[0070] Combination Figure 11 As can be seen, the components inside the negative ion chambers on both sides, along with their openings, are all rotated inwards at an angle, ideally around 20°. This structure is more conducive to the reverse airflow output from the negative ion chambers on both sides, further enhancing the stability of the negative ion clusters and the air purification effect. Furthermore, since the conical tube with spiral blades has excellent airflow diffusion performance, it can replace the function of the guide vanes on the opening of the negative ion chamber; therefore, these guide vanes can be eliminated or reduced. Experiments show that retaining only 1-2 guide vanes on the outer side also achieves a good airflow amplification effect.

[0071] It should also be noted that the aforementioned spiral blades can also be installed inside the subsequent duct 6. When the valve is closed, the spiral blades inside the duct have no function, but when the valve is open, the spiral blades inside the duct still serve to rotate the airflow.

[0072] Fourth embodiment: Based on the aforementioned embodiments, an installation structure for this air purifier is proposed. Because subway stations are large and not enclosed, with rapid airflow, the negative oxygen ions emitted by the air purifier 1 will disperse with the wind, making it difficult to accumulate to the required concentration. Therefore, this study installs two sets of air purifiers 1 opposite each other above the subway car door entrances 24 on the left and right sides of the subway station, with the openings of the two negative ion chambers 3 facing each other. Figure 12 As shown, two opposing airflows converge and collide in the middle, forming an air mass. To observe the airflow pattern, this study used lightweight fluff as a marker, which dispersed with the wind, making the resulting air mass clearly visible. Compared to unidirectional airflow, the air mass persisted for over 100% longer after the machine stopped. Tests showed that the negative ion concentration at the end of the airflow path was more than 30% higher with relative installation compared to unidirectional installation, thus allowing the limited negative oxygen ions to play a greater role.

[0073] The relative installation mentioned here ideally means that the outlets of the two negative ion chambers 3 are completely opposite each other. If installation conditions limit the distance between the outlets of the two negative ion chambers, the error should not be too large. Generally speaking, a height difference of ≤500mm and a horizontal position difference of ≤1000mm between the midpoints of the outlets of the two negative ion chambers can achieve good results.

[0074] Fifth embodiment: Figure 13 This paper introduces an alternative installation structure for air purifiers in subway stations. As shown in the diagram, two air purifiers (1) are installed as a group, facing each other on a column or wall (25) in the subway station. Generally, subway stations wider than 10 meters require a row of columns, and wider stations require several walls. Installing one air purifier (1) on each facing wall can improve the air quality between the walls, especially in the middle layer where people's heads are located. Lightweight fluff was used as a marker in the experiment, and all indicators were highly consistent with the previous example.

[0075] The sixth embodiment: an improvement upon the two embodiments described above. For example... Figure 14 As shown, there are four air purifiers 1, divided into two groups. Two sets of one group are installed above the subway car entrances 24 on both sides of the subway station, and two sets of the other group are installed on the pillars or walls 25 of the subway station. The two groups of four air purifiers form a square array.

[0076] To observe the airflow pattern, lightweight fluff was used as a marker. After the machine was turned on, it dispersed with the wind, revealing air masses colliding and swirling for an extended period. Compared to bidirectional installation, the duration of the air masses after shutdown was extended by more than 20%. Testing showed that the negative ion concentration was significantly higher in bidirectional installations than in unidirectional installations. Particularly at the end of the airflow path, i.e., the center line of the subway station, where the negative ion concentration of each individual airflow had already dropped to a low level, the negative ions accumulated due to the convergence of the four airflows, resulting in a concentration more than 25% higher than in bidirectional installations. This demonstrates that this is a relatively practical installation method.

[0077] Seventh embodiment: Based on the foregoing embodiments, the installation location of the air purifier is further optimized. For example... Figure 15 As shown, the negative ion air purifier is installed inside subway car 26. Subway cars are the most densely populated places, and therefore have the highest risk of air pollution. Therefore, installing an air purifier inside a subway car is of great significance.

[0078] There are many ways to install air purifiers in subway cars. This example recommends installing them under the ceiling of the car, where the air is purified most effectively at the head level, resulting in the highest concentration of negative ions and the best health benefits.

[0079] Alternatively, installing an air purifier in the vehicle's air intake duct is also a viable technical solution.

[0080] Eighth embodiment: Based on the first embodiment, the structure and performance of the front baffle 13 of the air purifier are further improved. For example... Figure 16 , Figure 17 As shown, the front panel 13 of the air freshener is equipped with an electronic display screen 27.

[0081] The electronic display screen includes a time display window 28, an air quality display window 29, and an advertising window 30. The time display window instantly shows the date, time, and time. The air quality display window primarily shows indicators such as the concentration of negative ions and particulate pollutants in the air. The advertising window displays various graphic and textual information, such as notices, current events, and product information.

[0082] Electronic displays can be made into remotely controlled systems using existing technologies. For example... Figure 18As shown, negative ion concentration sensors and particulate pollutant sensors are installed at multiple points within the subway station. The sensors transmit the collected data to a remote control center. Promotional and advertising videos, produced by a production center, are also sent to the remote control center. The remote control center processes the transmitted data, creating digital codes, which are then used by the digital control system to instruct the air purifiers whether to turn them on. Simultaneously, the air quality data and promotional text / images are converted into audio and video signals and displayed on electronic screens. This allows people to access real-time information on air quality and various economic data through the electronic displays.

Claims

1. A negative ion subway air purifier, characterized by: The air purifier (1) comprises a rectangular box (2), wherein the box is divided into three cavities by two partitions, wherein the middle cavity is a fan compartment (4), and the cavities on both sides are negative ion compartments (3), wherein a fan (5) is installed in the fan compartment, and an air duct (6) of the fan is connected to the negative ion compartments on both sides, and a filter (12) is arranged on the air inlet of the fan compartment, wherein negative ion generators (7) are installed in the negative ion compartments on both sides, and radiators (8) for emitting reverse airflow are respectively arranged in the negative ion compartments on both sides.

2. The negative ion subway air purifier according to claim 1, characterized in that: The radiator (8) is equipped with a long strip of guide plate (9) through a vertical rotating shaft (10) on the opening of the negative ion chamber (3); the rotating shaft (10) drives the guide plate (9) to swing under the drive of a motor (11).

3. The negative ion subway air purifier according to claim 2, characterized in that: The surface of the guide plate (9) is coated with a fullerene coating (17).

4. The negative ion subway air purifier according to claim 1, characterized in that: One end of the air duct (6) entering the negative ion compartment (3) is provided with a constant pressure valve (18).

5. The negative ion subway air purifier according to claim 4, characterized in that: A valve plate (21) is mounted on the valve opening (19) of the constant pressure valve (18) via a rotating shaft. The valve plate closes the valve opening under the action of a tension spring (20). When the pressure of the gas in the air duct (6) on the valve plate is greater than the tension of the tension spring, the valve plate opens to release the high-pressure gas. Subsequently, the valve plate returns to its original position under the pull of the tension spring to close the valve opening.

6. The negative ion subway air purifier according to claim 1, characterized in that: The radiator (8) is a tapered tube (22) which is thick at the front and thin at the back and is installed in the negative ion chamber (3). The small end of the tapered tube (22) is connected to the constant pressure valve (18) at the front end of the air duct (6), and the large end of the tapered tube (22) is opposite to the negative ion generator (7).

7. The negative ion subway air purifier according to claim 6, characterized in that: The conical tube (22) or the conical tube and the air duct (6) are provided with spiral blades (23).

8. The negative ion subway air purifier according to claim 7, characterized in that: The pitch angle of the spiral sheet (23) is ≥60°, and the number of spiral sheets is ≥2.

9. The negative ion subway air purifier according to claim 1, characterized in that: The air fresheners and purifiers (1) are arranged in groups of two and are installed relative to each other in the subway station.

10. The negative ion subway air purifier according to claim 9, characterized in that: The two sets of air fresheners (1) in one group are respectively installed above the door entrances (24) on the left and right sides of the subway station, and / or the two sets of air fresheners (1) in another group are respectively installed on the columns or walls (25) of the subway station, and the two groups of four air fresheners form a square array.

11. The negative ion subway air purifier according to claim 1, characterized in that: The air freshener and purifier (1) is installed in a subway car (26).

12. The negative ion subway air purifier according to claim 1, characterized in that: An electronic display screen (27) is installed in front of the fan compartment (4), and the electronic display screen is provided with a time display window (28), an air quality display window (29) and a publicity advertisement window (30).

13. The negative ion subway air purifier according to claim 12, characterized in that: The electronic display screen (27) cooperates with a remote control system. The remote control system processes and converts the data collected by the negative ion concentration detection sensor and the particulate pollutant detection sensor and the graphic information of the promotional advertisement into a digital remote control program to remotely control the air purifier and the electronic display screen.

Images