CN206637728U - A kind of public place air cleaning unit - Google Patents

Abstract

The utility model relates to an air purification device for public places, comprising an air duct and an electrostatic dust removal module, a sterilizing filter module and a carbon dioxide processing module arranged in the air duct in sequence; the air duct includes an air inlet and an air outlet, and the air inlet is provided with Fan; the electrostatic precipitator module is arranged on the inside of the fan, and the electrostatic precipitator module includes several horizontally arranged metal plates; lamp; the carbon dioxide treatment module includes a vertically arranged sponge filter, and sodium carbonate solution is sprayed in the sponge filter. The utility model fundamentally removes inhalable particles and biomacromolecules in the air by arranging an electrostatic dust removal module, a sterilizing filter module and a carbon dioxide treatment module in the air duct to achieve the effect of purifying the air.

Description

A public place air purification device

technical field

The utility model relates to the technical field of air purification devices, in particular to an air purification device for public places.

Background technique

The current air conditions in public places such as subway stations have the following problems: the increase in industrial emissions leads to an increase in the concentration of inhalable particulate matter in the air, which in turn leads to an increase in the content of air PM2.5 and chemical pollution components in the subway; Carrying a large number of passenger flow tasks every day, the carbon dioxide gas exhaled by these passengers has greatly increased the carbon dioxide content inside the entire subway, and the suitable temperature and humidity have nourished a large number of bacteria and viruses, organic substances such as aldehydes contained in building materials, and the special friction generated by wheel-rail friction Harmful iron ions and other factors make the air condition in the subway station very problematic.

At present, subway stations mostly use the traditional "fresh air system" to improve the air quality of subway stations. The "fresh air system" is based on using special equipment to send fresh air to the room on one side of the closed room, and then exhaust it to the outside from the other side by special equipment. A "fresh air flow field" will be formed indoors to meet the needs of indoor fresh air exchange. The "fresh air system" has the following defects:

(1) The "fresh air system" theoretically "dilutes" the air in the subway station, and it does not fundamentally remove pollutants; (2) Half of the "clean" air extracted by the "fresh air system" comes from the outdoors. In cities (the outdoor pollution is very serious), it may not be able to purify at all; (3) The high-power ventilation equipment it uses may cause discomfort to passengers and reduce the user experience of passengers waiting for trains or buying tickets at subway stations (4) It occupies a large volume and consumes a lot of energy; (5) It needs to be designed and completed at the initial stage of subway station design, and it is difficult to transform and upgrade afterwards.

Therefore, it is necessary to provide an air purification device for public places, which can fundamentally remove inhalable particles and biomacromolecules in the air to achieve the effect of purifying the air for the current air quality problems in public places such as subway stations.

Utility model content

The technical problem to be solved by the utility model is to provide an air purification device for public places, which fundamentally removes inhalable particulate matter and biological macromolecules in the air by installing an electrostatic dust removal module, a sterilizing filter module and a carbon dioxide treatment module in the air duct , to purify the air.

In order to solve the problems of the technologies described above, the utility model adopts the following technical solutions:

An air purification device for public places, comprising an air duct and an electrostatic precipitator module, a sterilizing filter module and a carbon dioxide treatment module sequentially arranged in the air duct; the air duct includes an air inlet and an air outlet, and the air inlet is provided with a fan; The electrostatic dust removal module is arranged on the inner side of the fan, and the electrostatic dust removal module includes several horizontally arranged metal plates; the bactericidal filter module includes a vertically arranged HEPA filter and an ultraviolet lamp arranged on the inner wall of the air duct; The carbon dioxide processing module includes a vertically arranged sponge filter, and sodium carbonate solution is sprayed in the sponge filter.

The electrostatic precipitator module and the sterilizing filter module fundamentally remove inhalable particles and biological macromolecules in the air, and do not need to be replaced frequently, only need to be cleaned regularly. At the same time, the sterilizing filter module utilizes HEPA filters and ultraviolet lamps to further kill biochemical small molecule pollutants. The carbon dioxide treatment module absorbs carbon dioxide in the air, and uses the sodium carbonate-sodium bicarbonate chemical reaction to realize the recycling of chemical reagents.

Preferably, the metal pole plate of the electrostatic precipitator module includes two pole plates with positive and negative charges, the two pole plates are an upper pole plate and a lower pole plate respectively, the upper pole plate is a planar structure, and the lower pole plate Equilateral triangular metal tips are evenly distributed on the upper surface of the pole plate.

Preferably, the electrostatic precipitator module further includes a high-frequency high-voltage power supply, the high-frequency high-voltage power supply is arranged on the outer wall of the top surface of the air duct, and the high-frequency high-voltage power supply is electrically connected to the metal plate.

Plasma technology is one of the most effective air treatment methods at present. It has good pollutant treatment effect, is safe and reliable, and has a very long replacement cycle (just wipe the plates regularly); its basic principle is to apply high-frequency and high-voltage current to positive On the two negative plates, a strong magnetic field is excited by the rapidly changing electric field on the metal plates, thereby absorbing the dust particles passing between the two plates. The method of treating air with positive and negative corona comparisons is used to obtain an efficient air treatment plan. Improve the electrode structure through electromagnetic field simulation, increase the discharge area, and improve the purification capacity. In view of the ozone gas that may be generated in the sub-band of electrostatic dust removal, the upper plate of the metal plate is a flat structure, and the upper surface of the lower plate is equipped with evenly distributed equilateral triangle metal tips, which can effectively reduce the occurrence of discharge phenomena and reduce the Production of ozone gas.

Preferably, an ozone filter is provided between the electrostatic dust removal module and the sterilizing filter module, and an ultraviolet lamp is provided on the inner wall of the air duct between the ozone filter and the HEPA filter. The ozone filter module can effectively absorb the ozone gas generated by the electrostatic precipitator module to avoid secondary pollution, and its purification rate can reach 96%. The HEPA filter and ultraviolet light can efficiently remove dust and sterilize the fast-flowing air in a relatively small integrated space.

Preferably, the carbon dioxide processing module further includes a pressure pump arranged outside the top surface of the air duct and a water tank arranged at the bottom of the sponge filter.

Preferably, the water inlet pipe of the pressure pump is communicated with the water tank, and the water outlet pipe of the pressure pump is arranged on the top of the sponge filter.

Preferably, a heating device is provided inside the pressure pump.

For the treatment of carbon dioxide, we use the chemical reaction of "sodium carbonate-sodium bicarbonate" mutual transformation to absorb carbon dioxide, and design a treatment plan using sodium carbonate as the medium. We placed two porous sponge filter screens in this module, sprayed the sodium carbonate solution on the sponge filter screen, and used the sponge filter screen as a carrier to form two "water curtains" of sodium carbonate solution, and used it to absorb carbon dioxide gas in the airflow, carbonic acid The sodium solution absorbs carbon dioxide and becomes a sodium bicarbonate solution. Because of continuous spraying, the sodium bicarbonate solution flows into the water tank at the bottom of the sponge filter, is pumped into the heating device by the pressure pump, and is heated and decomposed. The carbon dioxide gas generated by the decomposition is collected and processed , the obtained sodium carbonate solution is re-sprayed to the top of the sponge filter through the outlet pipe of the pressure pump, thereby separating carbon dioxide from the air, and realizing the recycling of the chemical medium-sodium carbonate solution.

Preferably, the air cleaning device further includes an air detection module, and the air detection modules are respectively arranged at the air inlet and the air outlet of the air duct. The air detection module monitors the pm2.5 content in the air, carbon dioxide concentration, air temperature and humidity and other indicators in real time, and adjusts the operating power of each module.

The beneficial effects of the utility model are as follows:

The air purification device for public places of the utility model adopts the above technical scheme, which can stabilize high-frequency and high-voltage pulses, reduce switch power consumption, and improve purification efficiency. Improve the metal plate structure through electromagnetic field simulation, increase the discharge area, and improve the purification capacity. For the ozone gas that may be generated in the sub-band of the electrostatic precipitator module, the two plates are divided into upper plate and lower plate respectively. The upper plate is a planar structure, and the upper surface of the lower plate is equipped with evenly distributed equilateral triangle metal tips , effectively reducing the occurrence of discharge phenomena, reducing the generation of ozone gas, and setting an ozone filter. The carbon dioxide treatment module has a unique structure, which realizes the function of essentially separating carbon dioxide in the air, and achieves the recycling of sodium carbonate chemical reagents.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

Fig. 1 shows a schematic diagram of a three-dimensional structure of a public place air purification device of the present invention.

Fig. 2 shows a schematic diagram of the three-dimensional structure of an air purification device in a public place of the present invention after the air duct is removed.

Fig. 3 shows a cross-sectional view of a public place air purification device of the present invention.

Fig. 4 shows a schematic structural diagram of a metal plate of an air purification device for a public place of the present invention.

Fig. 5 shows a circuit diagram of an electrostatic precipitator module of a public place air purification device of the present invention.

The marks in the figure are as follows: 1 air duct, 11 air inlet, 111 fan, 12 air outlet, 2 electrostatic precipitator module, 21 metal plate, 211 upper plate, 212 lower plate, 22 ozone filter, 3 sterilizing filter module , 31 HEPA filters, 32 UV lamps, 4 carbon dioxide treatment modules, 41 sponge filters, 42 pressure pumps, 43 sinks.

detailed description

In order to illustrate the utility model more clearly, the utility model will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present utility model.

An air purification device in public places of the present invention is planned to be installed inside the ventilation ducts of public places such as subway stations, so that the air exchange rate between traditional subway stations and the outside world is not changed, and at the same time, it can additionally purify the air in the fresh air ducts role.

As shown in FIGS. 1-4 , an air purification device for a public place of the present invention includes an air duct 1 and an electrostatic precipitator module 2 , a sterilizing filter module 3 and a carbon dioxide treatment module 4 sequentially arranged in the air duct 1 .

The air duct 1 includes an air inlet 11 and an air outlet 12 , and the air inlet 11 is provided with a fan 111 . Air duct 1 adopts rectangular stainless steel air duct (ECTFE Coating) material instead of galvanized, PVC, PP and FRP materials used in the past. It is highly resistant to chemical acid and alkali, impact resistance, corrosion resistance and high temperature resistance. It is applicable The temperature is between 150℉～300℉(-66℃～149℃); and it has the characteristics of beautiful appearance, smooth inner wall, small resistance, good air tightness and high bearing strength, which can be suitable for very complex exhaust projects , ensuring its applicability in subway stations. The fan 111 adopts a 60W exhaust fan to suck the air in the subway station into the air duct 1 of the purification device.

Further, the electrostatic precipitator module 2 is arranged inside the fan 111 , and the electrostatic precipitator module 2 includes several metal pole plates 21 arranged horizontally.

Further, the metal pole plate 21 of the electrostatic precipitator module 2 includes two pole plates with positive and negative charges, the two pole plates are an upper pole plate 211 and a lower pole plate 212 respectively, and the upper pole plate 211 is a plane structure, the upper surface of the lower plate 212 is provided with evenly distributed equilateral triangle metal tips. The electrostatic precipitator module 2 also includes a high-frequency high-voltage power supply, the high-frequency high-voltage power supply is arranged on the outer wall of the top surface of the air duct 1 , and the high-frequency high-voltage power supply is electrically connected to the metal plate 21 .

Figure 5 shows the circuit diagram of the electrostatic precipitator module 2. The high-frequency high-voltage power supply is composed of a step-down transformer and a full-bridge rectifier circuit. After being stabilized by 7809, a DC voltage of +9V is provided. The time base circuit 555 and R3, R4, C4, etc. form a multivibrator, and its oscillation frequency is

f=1.44/(R3+2R4)C4

Figure 5 shows that the oscillation frequency given by the parameters is about 30kHz. The pulse sequence output by 555 (the duty ratio is about 1:1) passes through the power tube Drive the high-frequency pulse transformer T1, and then output a high-voltage 30KHz pulse of about 3500V (no load).

The air in the air duct 1 flows through the metal pole plate 21 of the electrostatic precipitator module 2, and the strong magnetic field excited by the high-frequency changing strong electric field between the upper pole plate 211 and the lower pole plate 212 absorbs large dust particles in the airflow. Then, the air flow flows through the ozone filter screen 22 to remove a small amount of ozone pollution that may be produced by the metal pole plate 21 .

Further, the sterilizing filter module 3 includes a vertically arranged HEPA filter 31 and an ultraviolet lamp 32 arranged on the inner wall of the air duct 1 . An ozone filter 22 is provided between the electrostatic precipitator module 2 and the sterilizing filter module 3 , and an ultraviolet lamp 32 is provided on the inner wall of the air duct 1 between the ozone filter 22 and the HEPA filter 31 .

The airflow filtered by the ozone filter 22 enters the sterilizing filter module 3, and the ultraviolet lamp 32 and the HEPA filter 31 are used to remove biological and chemical small particle pollutants in the air.

Further, the carbon dioxide processing module 4 includes a vertically arranged sponge filter 41, and a sodium carbonate solution is sprayed in the sponge filter 41. The carbon dioxide processing module 4 also includes a pressure pump 42 arranged outside the top surface of the air duct 1 and a water tank 43 arranged at the bottom of the sponge filter 41 . The water inlet pipe of the pressure pump 42 is communicated with the water tank 43 , and the water outlet pipe of the pressure pump 42 is arranged on the top of the sponge filter 41 . The pressure pump 42 is provided with a heating device.

The airflow through the sterilization filter module 3 passes through the "water curtain" formed by the sponge filter screen 41 sprayed with sodium carbonate solution in the carbon dioxide treatment module 4, and the excess carbon dioxide therein will be absorbed and processed, and the sodium bicarbonate solution generated is collected in the water tank 43 In the process, it is drawn out by the pressure pump 42 and heated by the heating device to release carbon dioxide gas. The released carbon dioxide is treated centrally, and the remaining sodium carbonate solution is connected to the top of the sponge filter screen 41 through the pressure pump 42 for recycling.

Further, the air purification device further includes an air detection module, and the air detection modules are respectively arranged at the air inlet 11 and the air outlet 12 of the air duct 1 . The air detection module monitors the pm2.5 content in the air, carbon dioxide concentration, air temperature and humidity and other indicators in real time, and adjusts the operating power of each module.

Obviously, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation of the present utility model. For those of ordinary skill in the art, on the basis of the above description It is also possible to make other changes or changes in different forms. All the implementation modes cannot be exhausted here. All obvious changes or changes that belong to the technical solutions of the present invention are still within the protection scope of the present invention. .

Claims (8)

1. A kind of 1. public place air cleaning unit, it is characterised in that：Including airduct (1) and it is successively set in airduct (1) Electrostatic precipitation module (2), disinfection filtering module (3) and carbon dioxide treatment module (4)；

   The airduct (1) includes air inlet (11) and air outlet (12), and the air inlet (11) is provided with fan (111)；

   The electrostatic precipitation module (2) is arranged on the inner side of fan (111), and the electrostatic precipitation module (2) includes several water The flat metal polar plate (21) set；

   The disinfection filtering module (3) includes the HEPA screen packs (31) being vertically arranged and the purple for being arranged on airduct (1) madial wall Outside line lamp (32)；

   The carbon dioxide treatment module (4) includes the sponge filter screen (41) being vertically arranged, and is sprayed in the sponge filter screen (41) Sodium carbonate liquor.
2. A kind of 2. public place air cleaning unit according to claim 1, it is characterised in that：The electrostatic precipitation module (2) metal polar plate (21) includes two pieces of pole plates with positive and negative charge, and two pieces of pole plates are respectively top crown (211) and bottom crown (212), the top crown (211) is planar structure, and the upper surface of the bottom crown (212) is provided with equally distributed equilateral triangle Shape metal tip.
3. A kind of 3. public place air cleaning unit according to claim 2, it is characterised in that：The electrostatic precipitation module (2) high-frequency and high-voltage power supply is also included, the high-frequency and high-voltage power supply is arranged on the outer wall of airduct (1) top surface, the high-frequency high-voltage Source electrically connects with metal polar plate (21).
4. A kind of 4. public place air cleaning unit according to claim 1, it is characterised in that：The electrostatic precipitation module (2) ozone screen pack (22), the ozone screen pack (22) and HEPA screen packs (31) are provided between disinfection filtering module (3) Between airduct (1) madial wall on set ultraviolet lamp (32).
5. A kind of 5. public place air cleaning unit according to claim 1, it is characterised in that：The carbon dioxide treatment Module (4) also includes the compression pump (42) being arranged on outside airduct (1) top surface and the tank for being arranged on sponge filter screen (41) bottom (43)。
6. A kind of 6. public place air cleaning unit according to claim 5, it is characterised in that：The compression pump (42) Water inlet pipe connects connection with tank (43), and the outlet pipe of the compression pump (42) is arranged on the top of sponge filter screen (41).
7. A kind of 7. public place air cleaning unit according to claim 6, it is characterised in that：In the compression pump (42) Provided with heater.
8. A kind of 8. public place air cleaning unit according to claim 1, it is characterised in that：The air cleaning unit Also include air detection module, the air detection module sets the air inlet (11) and air outlet for being separately positioned on airduct (1) (12)。