Split type double-ion air quality-improving purifier

Abstract

The utility model relates to an environment-friendly facility, in particular to a split type double-ion air quality-improving purifier, which comprises a negative-ion generator and a fan, the fan is communicated with the negative-ion generator through an air pipe, and the split type double-ion air quality-improving purifier is characterized in that a plasma generator is arranged on the air pipe of the fan. A constant pressure valve is arranged at one end, entering the negative ion generator, of the air pipe; a valve cover is installed on a tubular valve port of the constant pressure valve through a rotating shaft, the valve cover seals the valve port under the action of a tension spring, when the pressure of gas in the air pipe on the valve cover is larger than the tension of the tension spring, the valve cover is opened, high-pressure gas is discharged, then the valve cover is pulled by the tension spring to return, and the valve port is closed. The device has the beneficial effects that the plasma generator and the negative ion generator are integrated and are separately arranged, so that mutual interference is avoided, and advantage complementation is realized. And in addition, by adopting the technical schemes of intermittent deflation, rotating airflow, relative installation and the like, a high-concentration negative oxygen ion air mass which continuously operates for a long time is obtained, the air quality improvement and purification effect is very remarkable, and the device is expected to become the first choice equipment for air purification and quality improvement in large-scale places such as subways and the like.

Description

Technical Field

[0001] The utility model relates to an environmental protection facility, namely a split double-ion air quality purifier suitable for air purification in large-scale crowded places such as subways. Background Art

[0002] The subway is located deep underground, relatively closed, and crowded. Harmful microorganisms such as germs and viruses, formaldehyde, TVOC, Pm particles and other pollutants, as people continue to pour in, the risk of cross infection is high. In order to solve this problem, people have adopted ventilation measures to continuously input clean air to keep the air quality at a high level. However, since the pollution source comes from the inside, there is still a risk of infection in the process of outward flow. Therefore, only by killing microorganisms and pollutants in the air can the problem of air pollution be solved from the source.

[0003] At the current level of science and technology, there are many technologies for killing microorganisms and decomposing pollutants, such as disinfectants, ultraviolet light, etc. However, most of the above technologies have negative effects on the human body and cannot be used. In this case, negative ions show unique advantages. Negative ions can not only absorb and decompose microorganisms and pollutants in the air, but also enter the human body, making people feel comfortable and refreshed, improving human functions, and preventing and treating various diseases. They are the preferred choice for air purification and quality improvement in large places with dense populations such as subways. At the same time, a variety of negative ion generating equipment has been launched on the market, providing conditions for air purification in places such as subways. However, negative ions require a higher concentration to play a role. According to relevant information, the concentration of negative ions in the air must reach more than 20,000 / cm3 to kill bacteria and viruses. In larger places such as subway stations, the amount of human activity is large and the air flows quickly. The negative ion airflow generated by existing equipment has a very short attenuation period and weak activity ability. It is very easy to drift with the wind and it is difficult to migrate to a designated location to reach a higher concentration. Therefore, it has not yet been installed and used in places such as subways.

[0004] As we all know, plasma is the state in which the atoms of a substance, under the action of a high-voltage electric field, change the original stable relationship between positive and negative electrons, form a state of motion that is close and distant, and release huge energy in the intense activity, which can quickly decompose microorganisms and pollutants. Although plasma cannot be free in the air like negative ions and actively attack microorganisms and pollutants, it can still purify the passing airflow. For this reason, I have combined a plasma generator with a negative ion generator to make a dual ion generator. However, due to the large difference in the voltage required by the two ion generators, they will interfere with each other when combined together, limiting the generation of negative ions, and therefore require the use of complex circuits and materials, which are costly and difficult to popularize.

[0005] According to the literature, there are occasional reports of attempts to combine negative ions and plasma, but no reports have been found that propose and solve the problem of mutual interference between the two ion generation methods. Summary of the invention

[0006] The utility model aims to provide a split type dual ion air quality purifier which can quickly eliminate germs, viruses and other pollutants in the air and significantly improve the air quality in crowded places such as subways.

[0007] The above purpose is achieved by the following technical solution: a split dual-ion air quality purifier, including a negative ion generator and a fan, the fan is connected to the negative ion generator through an air duct, and is characterized in that a plasma generator is provided on the air duct of the fan.

[0008] One end of the air duct is equipped with a fan, and the other end is connected to a negative ion generator. The plasma generator is installed in the middle of the air duct.

[0009] A fan is arranged in the middle of the air duct, a plasma generator is arranged at one end of the air duct, and the other end of the air duct is connected with a negative ion generator.

[0010] A constant pressure valve is arranged at one end of the air duct entering the negative ion generator.

[0011] A valve plate is installed on the valve port of the constant pressure valve through 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 air duct relative to the valve plate is greater than the tension of the tension spring, the valve plate opens to release high-pressure gas, and then the valve plate returns to its original position under the pull of the tension spring to close the valve port.

[0012] A spiral blade is arranged in the air duct.

[0013] The pitch angle of the spiral sheet is ≥65°, and the number of spiral sheets is ≥2.

[0014] The dual-ion air quality improvement purifier has a rectangular box body, which is divided into three cavities by two partitions. The middle cavity is a plasma chamber, and the cavities on both sides are negative ion chambers. The plasma chamber is equipped with a fan and a plasma generator. The air outlet of the fan is connected to the negative ion chambers on both sides. A filter is provided on the air inlet of the plasma chamber. Negative ion chambers on both sides are equipped with negative ion generators. Multiple guide vanes are installed on the outer outlet of the negative ion chamber through an upright rotating shaft, and the rotating shaft drives the guide vanes to swing under the drive of a motor.

[0015] The air quality improvement purifiers are arranged in pairs in a group and are installed opposite to each other.

[0016] The two sets of air quality improvement purifiers in one group are respectively installed above the door entrances on the left and right sides of the subway station, or the two sets of air quality improvement purifiers in one group are respectively installed on the opposite columns or walls of the subway station, or the two groups of air quality improvement purifiers are respectively installed above the door entrances on both sides and on the opposite columns or walls of the subway station, and two groups of four air quality improvement purifiers form a square array.

[0017] The dual-ion air quality improvement purifier is installed in a subway car.

[0018] An electronic display screen is arranged in front of the plasma chamber, and the electronic display screen is provided with a time display window, an air quality display window and a publicity advertisement window.

[0019] The electronic display screen 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 quality purifier and the electronic display screen.

[0020] The beneficial effect of the utility model is that the device integrates a plasma generator and a negative ion generator into one, and is set separately to avoid mutual interference and achieve complementary advantages. In addition, by adopting technical solutions such as intermittent air release and spiral airflow and relative installation, a high-concentration negative oxygen ion air mass that operates continuously for a long time is obtained, and the effect of air quality improvement and purification is very significant. It is expected to become the preferred equipment for air purification and quality improvement in large places such as subways. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a structural diagram of a first embodiment;

[0022] FIG2 is a structural diagram of a second embodiment;

[0023] FIG3 is a diagram showing a closed state of a pressure regulating valve of a component of the third embodiment;

[0024] FIG4 is a diagram showing the opening state of the pressure regulating valve of the third embodiment;

[0025] Fig. 5 is an assembly diagram of the spiral pieces of the fourth embodiment;

[0026] FIG6 is a schematic diagram of a spiral airflow of a fourth embodiment;

[0027] FIG7 is a front view of the fifth embodiment;

[0028] FIG8 is a top view of the fifth embodiment;

[0029] FIG9 is a top view of the cam drive of the fifth embodiment;

[0030] FIG10 is a partial top view of the guide vane of the fifth embodiment in a swinging state;

[0031] FIG11 is a front view of the sixth embodiment;

[0032] FIG12 is a top view of the sixth embodiment;

[0033] FIG13 is a top view of the mounting structure of the seventh embodiment;

[0034] FIG14 is a top view of the mounting structure of the eighth embodiment;

[0035] FIG15 is a top view of the mounting structure of the ninth embodiment;

[0036] FIG16 is a front view of a subway car according to the tenth embodiment;

[0037] Fig. 17 is a front view of the eleventh embodiment;

[0038] FIG18 is a top view of an eleventh embodiment;

[0039] FIG. 19 is a block diagram of a remote control device according to an eleventh embodiment.

[0040] As can be seen in the figure: air quality purifier 1, fan 2, air duct 3, plasma generator 4, negative ion generator 5, constant pressure valve 6, valve port 7, valve cover 8, tension spring 9, tapered tube 10, spiral sheet 11, box body 12, negative ion chamber 13, plasma chamber 14, filter 15, outlet 16, guide plate 17, rotating shaft 18, motor 19, front baffle 20, motor output wheel 21, cam 22, return spring 23, subway door entrance 24, vertical wall 25, subway car 26, electronic display screen 27, time display window 28, air quality display window 29, publicity advertising window 30. DETAILED DESCRIPTION

[0041] The first embodiment: FIG. 1 introduces a split dual-ion air quality purifier 1, comprising a fan 2 and a negative ion generator 5, the fan is connected to the air inlet of the negative ion generator through an air duct 3, and is characterized in that a plasma generator 4 is provided on the air duct 3 of the fan 2.

[0042] The specific structure is recommended to adopt the following method: a fan is installed at one end of the air duct, and the other end is connected to the air inlet of the negative ion generator, and a plasma generator is installed in the middle of the air duct. A structure of "fan + plasma generator + negative ion generator = dual ion generator" is formed. Among them, the plasma generator and the negative ion generator are separated and connected in series by the air duct. The power supply can adopt the existing technology, that is, a set of pulse boost circuits, with two voltage taps, and the voltage of the plasma generator is selected to be 8000-15000V. The voltage of the negative ion generator is selected to be 4000-5000V. It is best to use a filter device at the inlet end of the fan to filter out larger particles. The high-pressure airflow pushed by the fan passes through the plasma generator, and the positive and negative ions of the air atoms are dissociated to form a plasma state that can neither combine in the original order nor be completely separated. The unstable positive and negative ions collide violently, producing countless lightning effects at countless points. In this state, germs, viruses and other microorganisms cannot survive, and the structures of various pollutants are destroyed, thus forming clean gas without germs, viruses and pollutants. Then the airflow passes through the negative ion generator. Under the action of the electric field force, the peripheral electrons of the negative ion generator are separated to form negative ions. The negative ions are captured by the surrounding air to form negative oxygen ions, which are finally discharged into the ambient air.

[0043] Experiments show that the split dual ion generator has at least two advantages: First, it avoids the problem of mutual interference between the two ion generators, and the amount of negative ions generated does not decrease but increases. According to measurements, after a set of negative ion generators are connected in series with a plasma generator, the concentration of negative ions at the outlet 30cm increases by 18.3%. The reason for the analysis is that the ratio of positive and negative ions generated by the plasma generator is about 1:1.5, the number of negative ions is greater than the number of positive ions, and some negative ions enter the negative ion generator, and the number of negative ions will increase significantly. Second, the decay rate of negative oxygen ions is greatly reduced. According to relevant information, in air with more pollutants, the existence time of negative oxygen ions is generally only about 1-2 minutes. In clean air, it can be extended to 20 minutes. Therefore, the cleanliness of air treated with plasma is significantly improved, the survival time of negative oxygen ions is greatly extended, the distance of negative oxygen ions migration increases accordingly, and the concentration of negative oxygen ions increases accordingly.

[0044] Second embodiment: FIG2 introduces another split dual ion air quality improvement purifier 1. Compared with the first embodiment, the order of components in this embodiment has changed. A fan 2 is installed in the middle of the air duct 3, a plasma generator 4 is installed at one end of the air duct, and the other end of the air duct 3 is connected to a negative ion generator 5. A structure of "plasma generator + fan + negative ion generator" is formed. For the plasma generator, the fan is an induced draft fan, and for the negative ion generator, the fan is a supply fan.

[0045] Obviously, the working principle of this structural mode is the same as that of the first embodiment, but the plasma generator and the negative ion generator are farther apart, the mutual interference is smaller, and the complementarity is stronger.

[0046] The third embodiment: On the basis of the previous embodiment, efforts are made to resolve the contradiction between the flow rate of negative oxygen ion airflow and the concentration of negative ions. Since the space in places such as subway stations is relatively large, negative oxygen ions need to be able to migrate a large distance during the air purification process. That is, the airflow carrying negative ions must go far and persist for a long time, and cannot be dispersed by the surrounding airflow too early. In order to achieve this goal, the existing method is to increase the wind pressure of the negative oxygen ion airflow. That is to say, a relatively high-power fan should be used to work continuously. While obtaining a higher wind pressure, a larger air flow rate is required. In this process, the output of negative oxygen ions remains unchanged, and the concentration of negative ions in the airflow will decrease. This creates a contradiction between high concentration of negative oxygen ions and large air volume, which is a difficult problem with a high degree of trouble.

[0047] In order to solve this problem, this study improves the structure of the air duct. As shown in FIG3 , a constant pressure valve 6 is installed at one end of the air duct 3 of the fan 2 entering the negative ion generator 5 .

[0048] The constant pressure valve mentioned here is a valve that can only be opened under a set pressure. Constant pressure valves are commercially available products with a variety of available structures. The figure only illustrates a simple constant pressure valve. The valve body of this constant pressure valve is tubular, with the front end of the tube as a valve port 7, and a valve cover 8 hinged on the outside of the valve port. The valve cover closes the valve port under the action of a tension spring 9. The tension of the tension spring is adjustable. Assuming that the opening pressure of the valve cover is 1.5 atmospheres, the tension of the tension spring should be selected to match it.

[0049] The fan mentioned here should be a fan with a small air volume compared to the original fan. When working, as shown in Figure 3, the valve cover is in a closed state. After the fan is turned on, the negative ion generator begins to release negative ions and forms negative oxygen ions around the generator. However, since the wind pressure in the air duct is very low and the valve cover has not been opened, the air flow cannot be released, and the negative oxygen ions mainly move in the negative ion generator. When the air pressure in the air duct increases to the set value, that is, the wind pressure value generated by the original fan, as shown in Figure 4, the valve cover opens, and the high-pressure gas rushes out, carrying the negative oxygen ions out of the negative ion generator. Then the wind pressure in the air duct drops sharply, and the valve cover returns to its position under the pull of the tension spring, closing the valve port and starting the next cycle.

[0050] Obviously, compared with the continuous output of high-pressure airflow, this intermittent deflation not only reduces energy consumption, but also reduces the amount of gas. Although the flow rate of the airflow is small, the number of negative ions has not decreased, so the concentration of negative ions in the airflow must increase. Taking the ratio of the valve cover opening time to the closing time as 1:3, the ratio of the exhaust time of this device to the exhaust time of the original large air volume fan is 1: (1 + 3) = 1: 4. Because the exhaust pressure is the same, the ratio of the gas exhaust volume of the two is also 1: 4. Similarly, it can be deduced that the number of negative oxygen ions blown by this device each time it is deflated = the number of negative ions discharged by the original large fan for 4 times the duration. In other words, the concentration of negative ions in each open airflow is equal to 4 times that of the existing technology. In actual work, the ratio of the switch time of this machine can reach more than 1: 10, and the concentration of negative ions increases by more than 10 times. It can be seen that this method solves the contradiction between high concentration and large air volume, and achieves the purpose of small air volume, high air pressure, and high negative ion concentration.

[0051] In addition, this constant pressure valve is installed behind the negative ion generator, which makes the radiation path of negative oxygen ions unobstructed, avoiding the disadvantage of frequent friction between negative oxygen ions and complex components, especially head-on collision, which leads to significant attenuation.

[0052] Furthermore, a tapered tube 10 with a thick front and a thin back is installed in front of the constant pressure valve, and the front end of the tapered tube is opposite to the negative ion generator 5. This tapered tube can make the high-pressure airflow rush out radially, which can not only push out all the negative oxygen ions in the negative ion compartment, but also expand the diffusion range.

[0053] Fourth embodiment: Based on the above embodiment, the structure of the air duct 3 of the air quality purifier is further improved. As shown in FIG5 , the air quality purifier 1 includes a fan 2, a duct 3, a plasma generator 4 and a negative ion generator 5, and is characterized in that a spiral blade 11 is provided in the duct. Under the constraint of the spiral blade, the airflow produced by the fan forms a rotating airflow.

[0054] As can be seen in the figure, the shell shape of the negative oxygen ion generator is preferably trumpet-shaped, that is, a tapered tube 10 with a gradually increasing diameter on the outlet side. In this way, the resistance of the airflow can be reduced and the rotation radius of the airflow can be increased, forming a conical rotating airflow as shown in Figure 6. Obviously, the conical rotating airflow can cover a larger range after entering the environment.

[0055] In order to prove that the rotating airflow has better performance than the straight airflow, we used the fluff method experiment: the same specification of fans supply air, one is a common air duct, and the other is an air duct equipped with spiral blades. Two negative ion generators of the same specification, with equal amounts of soft fluff placed at the outlet. After turning on the machine, under the light, it can be seen that the fluff of the rotating airflow moves faster than the fluff of the straight airflow, and is not easy to disperse. When the straight fluff reaches 4.2m, the fluff is completely dispersed. At this time, the rotating airflow has reached 5.1m and has not dispersed. Continue to fly until it reaches 5.8m before it begins to disperse. From the above data, it can be seen that the flow rate increase of the rotating airflow compared to the straight airflow = (5.1-4.2) / 4.2=21.4%. The jump distance increase is (5.8-4.2) / 4.2=38.1%.

[0056] It can be seen that the rotating airflow is not easy to dissipate and can be maintained for a long time. After being emitted, it can pass through the ambient air at a faster speed and migrate to a farther location. And it can maintain a high concentration of negative oxygen ions for a long time, and the effect of air quality improvement and purification is better.

[0057] According to the current experimental results, the parameters of the spiral blades should be set under the premise of small wind resistance and high wind speed, that is, the wind resistance of the spiral blades should be as small as possible, and the linear speed of the rotating airflow should be as large as possible. After a large number of experiments, it is preferred that the spiral angle ≥ 65° has better effects. Due to the large angle of rise, the number of spiral blades in the air duct can be selected to be more than 2. In order to reduce the attenuation of negative oxygen ions, the area of ​​the spiral blades should be reduced as much as possible behind the negative ion generator. The number of spiral blades can be reduced to 1, and if the distance is short, the spiral blades can be omitted. In this way, the rotation of the airflow can be maintained, and the friction loss between the negative oxygen ions and the components will be reduced.

[0058] The fifth embodiment: Based on the above embodiments, a dual ion air quality improvement purifier is proposed. Figure 7 As shown in FIG8 , the device has a rectangular box 12, which is divided into three cavities by two partitions. The cavities on both sides are negative ion chambers 13, and the cavity in the middle is a plasma chamber 14. Two sets of negative ion generators 5 are installed in the negative ion chambers on both sides, and the outside of the negative ion chambers is open as an outlet 16. The plasma chamber is equipped with a fan 2 and a plasma generator 4, and the air outlet of the fan 2 is connected to the negative ion chambers on both sides, and a filter 15 is provided on the air inlet of the plasma chamber.

[0059] The air inlet of the plasma here can be facing forward or on other sides. When installed on a flat wall, it is more convenient to have the air inlet facing forward. At this time, a front baffle 20 should be installed in front of the air inlet filter. The left and right sides of the front baffle should preferably be closed, leaving only gaps on the upper and lower sides for air inlet. In addition, the height of the front baffle should be higher than the height of the air outlet to prevent the gas discharged from the air outlet from being sucked back.

[0060] Furthermore, a plurality of guide vanes 17 are mounted on the outlet 16 of the negative ion chamber 13 via a vertical rotating shaft 18, and the rotating shaft drives the guide vanes to swing under the drive of a micro motor 19. A variety of transmission modes can be used between the motor and the rotating shaft. Fig. 9 A relatively simple cam mechanism is given as an example. As can be seen in the figure, the motor output wheel 21 and the guide vane shaft 18 are both equipped with cams 22, and the shaft is also equipped with a return spring 23. When the motor is turned on, the motor output wheel rotates, and when the cam contacts, as shown in Figure 10, the shaft rotates, driving the guide vane 17 to swing. After the two cams are disengaged, the shaft drives the guide vane to slowly return to its original position under the action of the return spring. In this way, the guide vane can swing repeatedly within the set angle, and the negative oxygen ion airflow emitted from the outlet 16 will diffuse outward at different angles, thereby improving and purifying the air in a wide angle range.

[0061] In addition, the biggest advantage of this air quality purifier is that when the guide plates on both sides of the rectangular box turn inward, the negative ion airflows on both sides will cross and form air masses through collision and friction. Compared with the same amount of negative ion airflow in a single direction, this air mass is not easily dispersed by the ambient airflow, the duration is greatly extended, and the air purification effect is significantly enhanced.

[0062] According to the tests of Shanghai Institute of Metrology and Testing Technology, East China National Metrology and Testing Center, and Shanghai Testing Center, the negative ion generation and concentration index of this equipment are better than those of products with the same specifications. According to field tests, this equipment has more outstanding performance in cracking germs, viruses and pollutants. A set of air fresheners with an air supply volume of 450m3 / h is installed above the entrance of the subway car door, which can continuously purify the air in front of the entrance, which is 5m long, 3m high, and about 75m3.

[0063] The local space simulation experiment in the subway station obtained the purification results as shown in the following table:

[0064] Test items Before starting 5 hours after power on Particulate matter (PM2.5) (μg / m3) 28 3 Formaldehyde (μg / m3) 0.04 0.01 Toluene (ppd) 0.08 0 TVOC (ppd) 0.99 0 .

[0065] It can be seen that the working effect of this dual-ion air quality purifier is remarkable.

[0066] Sixth embodiment: A specific structure is proposed based on the above embodiments. As shown in FIG. 11 and FIG. 12, this device has a rectangular box, which is divided into three cavities by two partitions. The cavities on both sides are negative ion chambers 13, and the cavity in the middle is a plasma chamber 14. Negative ion generators are installed in the negative ion chambers on both sides, and the outside of the negative ion chambers is open as an outlet 16. A fan 2 and a plasma generator 4 are installed in the plasma chamber, and the air outlet of the fan 2 is connected to the negative ion chambers on both sides, and a filter 15 is provided on the air inlet of the plasma chamber.

[0067] As can be seen from the figure, this dual-ion air quality purifier is different from the fifth embodiment in that the plasma generator is installed in the air duct. Obviously, the plasma generator of the fifth embodiment is arranged outside the air duct, and can ionize the air entering the warehouse, and then inhale it into the fan and inject it into the negative ion warehouse. The advantage of this method is that the amount of plasma that processes the air is large, the time is long, and the degree of purification is high. But the disadvantage is that a small amount of plasma may pass through the filter and overflow and lose. The plasma generator in this example is installed in the air duct, the plasma cannot be lost, and the utilization rate is higher. However, the contact time between the plasma and the airflow is short, and the degree of purification is low. Fortunately, the shortcomings of both can be solved through different structural improvements. Therefore, both have high practical value.

[0068] The seventh embodiment: On the basis of the above-mentioned embodiments, the installation structure of the present air quality purifier is proposed. As mentioned above, in a larger space that is not enclosed, the negative oxygen ions emitted by the air quality purifier 1 will drift with the wind, and it is difficult to accumulate to the required concentration. For this reason, this study installed two sets of air quality purifiers 1 relatively, that is, the outlets 16 of the two negative ion compartments 13 are opposite. The two relatively emitted air flows converge in the middle and conflict with each other to form an air mass. Compared with the air flow in a single direction, the time for this air mass to drift will be greatly extended, and the concentration of negative oxygen ions in the air will be greatly increased.

[0069] FIG13 introduces the installation structure of the air quality purifier in the subway station. As can be seen in the figure, every two sets of air quality purifiers 1 form a group, and the two sets of air quality purifiers are installed above the subway door entrance 24 on the left and right sides of the subway station. Obviously, this is also the place with the most people. The two sets of air quality purifiers just cover the range of the crowd, and the mainstream of the gas is concentrated at the position of the human head. According to the test, the relative installation has a 20-30% increase in the negative ion concentration compared with the staggered installation, which enables the limited negative oxygen ion airflow to play a better role.

[0070] The relative installation mentioned here is, of course, that the outlets 16 of the two negative ion chambers are completely opposite to each other. If the installation conditions limit the outlets of the two negative ion chambers to be not completely opposite to each other, then the error cannot be too large. Generally speaking, the height difference between the midpoints of the emission ports of the two negative ion chambers is ≤500mm, and the horizontal position difference is ≤1000mm, which can achieve better results.

[0071] The eighth embodiment: FIG. 14 introduces another installation method of the air quality purifier. Two sets of air quality purifiers are installed on the columns or walls 25 of the subway station relative to each other. Generally speaking, a subway station with a width of more than 10m must be equipped with a row of columns, and a wider subway station must also be equipped with several walls. By installing a set of air quality purifiers 1 on the opposite walls, the air between the walls can be improved and purified, and the effect is good.

[0072] Ninth embodiment: Improved on the basis of the above two embodiments. As shown in FIG15 , there are two groups of air quality purifiers 1 , one group of two sets of air quality purifiers are respectively installed above the subway door entrances 24 on both sides of the subway station, and the other group of two sets of air quality purifiers are respectively installed on the columns or walls 25 of the subway station, and the two groups of four air quality purifiers form a square array.

[0073] Obviously, in this installation structure, the negative oxygen ion airflow converges from all four sides to the middle, lasts longer, and more negative ions accumulate. Especially in the middle position, the concentration of negative oxygen ions in each airflow has dropped to a low level, but because the four airflows converge here, the negative ions are superimposed and accumulated, and their concentration can meet the standard and is relatively stable, so it is a more preferred installation method.

[0074] The tenth embodiment: Based on the above embodiment, the installation position of the air quality improvement purifier is further optimized. As shown in FIG16 , the dual ion air quality improvement purifier is installed in a subway car 26. The subway car is the most crowded place with the greatest risk of air pollution. Therefore, it is of great significance to install the dual ion air quality improvement purifier in the subway car.

[0075] There are many ways to install air quality purifiers in subway cars. In this case, it is recommended to install them under the ceiling of the car for the best effect.

[0076] In addition, the air quality purifier can also be installed in the air intake duct of the car, which is also a feasible technical measure.

[0077] Eleventh embodiment: On the basis of the third embodiment, the structure and performance of the front baffle 20 of the air quality improvement purifier are further improved. As shown in FIG. 17 and FIG. 18 , the front baffle 20 of the dual ion air quality improvement purifier is equipped with an electronic display screen 27 .

[0078] The electronic display screen is provided with a time display window 28, an air quality display window 29 and a publicity window 30. The time display window can instantly display the time value of year, month, day, hour, minute and second. The air quality display window mainly displays indicators such as the concentration of negative ions, microorganisms and pollutants in the air. The publicity window displays various graphic information, such as notices, current events, slogans and product information.

[0079] The electronic display screen can be made into a remote control system using existing technology. As shown in Figure 19, negative ion concentration detection sensors and particulate pollutant detection sensors are installed at multiple points in the place where the air quality purifier is installed. The sensors transmit the collected data to the remote control center. The promotional video and advertising video are produced by the production center and also sent to the remote control center. The remote control center processes the transmitted data to form a digital code, and then the digital control system issues an instruction to the air quality purifier whether to turn on the machine. At the same time, the pictures and texts of the air quality and promotional advertisements are converted into audio and video signals and broadcast by the electronic display screen. In this way, people can keep abreast of the air quality and various political and economic information through the electronic display screen.

Claims

1. A split dual-ion air quality improvement purifier, comprising a fan (2) and a negative ion generator (5), wherein the fan (2) is connected to the negative ion generator (5) via an air duct (3), and is characterized in that: The air duct (3) of the fan (2) is provided with a plasma generator (4); One end of the air duct (3) entering the negative ion generator (5) is equipped with a constant pressure valve (6); A valve cover (8) is mounted on the tubular valve port (7) of the constant pressure valve (6) via a rotating shaft. The valve cover (8) closes the valve port (7) under the action of a tension spring (9). When the pressure of the gas in the air duct on the valve cover is greater than the tension of the tension spring, the valve cover opens to release the high-pressure gas. Subsequently, the valve cover returns to its original position under the pull of the tension spring to close the valve port.

2. The split type dual ion air quality improvement purifier according to claim 1 is characterized in that: One end of the air duct (3) is equipped with a fan (2), and the other end is connected to a negative ion generator (5). The plasma generator (4) is installed in the middle of the air duct.

3. The split type dual ion air quality improvement purifier according to claim 1 is characterized in that: A fan (2) is installed in the middle of the air duct (3), a plasma generator (4) is installed at one end of the air duct (3), and the other end of the air duct (3) is connected to a negative ion generator (5).

4. The split type dual ion air quality improvement purifier according to claim 1 is characterized in that: A spiral blade (11) is provided in the air duct (3).

5. The split type dual ion air quality improvement purifier according to claim 4 is characterized in that: The pitch angle of the spiral plate (11) is ≥65°, and the number of spiral plates is ≥2.

6. The split type dual ion air quality improvement purifier according to claim 3 is characterized in that: The air quality improvement purifier (1) comprises a rectangular box (12), wherein the box (12) is divided into three cavities by two partitions, wherein the middle cavity is a plasma chamber (14), and the cavities on both sides are negative ion chambers (13), wherein a fan (2) and a plasma generator (4) are installed in the plasma chamber (14), wherein an air outlet of the fan (2) is connected to the negative ion chambers (13) on both sides, wherein a filter screen (15) is provided on an air inlet of the plasma chamber (14), wherein negative ion chambers (13) on both sides are each equipped with a negative ion generator (5), and wherein a plurality of guide vanes (17) are installed on an outlet (16) of the negative ion chamber (13) via a vertical rotating shaft (18), wherein the rotating shaft (18) drives the guide vanes (17) to swing under the drive of a motor (19).

7. The split type dual ion air quality improvement purifier according to claim 1 is characterized in that: The air quality improvement purifiers (1) are arranged in groups of two and are installed opposite to each other.

8. The split type dual ion air quality improvement purifier according to claim 7 is characterized in that: The two sets of air quality improvement purifiers (1) in one group are respectively installed above the subway door entrances (24) on both sides of the subway station, or the two sets of air quality improvement purifiers (1) in one group are respectively installed on opposite columns or walls (25) of the subway station, or the two sets of air quality improvement purifiers (1) are respectively installed above the subway door entrances (24) on both sides of the subway station and on opposite columns or walls (25) of the subway station, and the two groups of four air quality improvement purifiers (1) form a square array.

9. The split type dual ion air quality improvement purifier according to claim 1, characterized in that: The air quality improvement purifier (1) is installed in a subway car (26).

10. The split type dual ion air quality improvement purifier according to claim 6, characterized in that: An electronic display screen (27) is installed in front of the plasma chamber (14), and the electronic display screen (27) is provided with a time display window (28), an air quality display window (29) and a publicity advertisement window (30).

11. The split type dual ion air quality improvement purifier according to claim 10, characterized in that: The electronic display screen (27) cooperates with a remote control system, and the remote control system processes and converts 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 advertisement, into a digital remote control program, so as to remotely control the air quality purifier and the electronic display screen.

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