Corona Disinfection Module

Abstract

A corona disinfection module, characterized in that the corona disinfection module comprises a negatively conductive perforated plate and a positively conductive grid plate arranged at a distance from each other, wherein: the negative conducting perforated plate is provided with a plurality of mounting holes, a metallic round tube is attached to each mounting hole, the opening of the metallic round tube on the side near the mounting hole serves as an air inlet, and the other opening of the metallic round tube serves as an air outlet; the positively conducting grid plate is provided with several discharge needles which are arranged in a clearly corresponding manner to the metallic round tubes, and the tip of each discharge needle extends through the associated air outlet of the metallic round tube into the metallic round tube; and the ratio between the distance between the tip of the discharge needle and the air inlet of the metallic round pipe and the length of the metallic round pipe is 1 / 6 to 1 / 5.

Description

Technical area

[0001] The present utility model relates to the field of indoor air purification and disinfection, in particular a corona disinfection module. State of the art

[0002] Indoor air pollution is one of the three major environmental pollutants that currently pose a serious threat to human health. Indoor air generally contains several types of pollution, such as microbial pollution, fine inhalable particle pollution, and toxic and harmful gas pollution. The disease-causing potential of indoor air pollution is an invisible killer of human health.

[0003] Corona disinfection technology is an ideal technology for air purification and disinfection. It uses a discharge needle to create a corona zone in a metallic cylinder to disinfect and sterilize the air flowing through the metallic cylinder. At the same time, the walls of the metallic cylinder adsorb the charged particles after passing through the corona zone.

[0004] A disadvantage of existing corona disinfection modules is that the adsorption capacity of the metallic cylinder for particles and microorganisms (i.e., the dust removal capacity) is relatively weak. To overcome this disadvantage, one viable solution is to extend the length of the metallic cylinder, and another viable solution is to additionally install multi-layer dust filters on the front or rear of the corona disinfection module. Both of these solutions lead to an increase in the thickness of the disinfection module, which in turn increases the installation space and complexity. Content of the utility model

[0005] In order to overcome the above-mentioned disadvantages of the existing corona disinfection modules, the present utility model provides a corona disinfection module whose detailed technical solution is as follows: A corona disinfection module comprises a negatively conductive perforated plate and a positively conductive grid plate arranged at a distance from each other, wherein: the negatively conducting perforated plate is provided with several mounting holes, a metallic round tube is attached to each mounting hole, the opening of the metallic round tube on the side closest to the mounting hole serves as an air inlet, and the other opening of the metallic round tube serves as an air outlet; the positively conducting grid plate is provided with a plurality of discharge needles arranged in a clearly corresponding manner to the metallic round tubes, and the tip of each discharge needle projects through the associated air outlet of the metallic round tube into the metallic round tube; and the ratio between the distance between the tip of the discharge needle and the air inlet of the metallic round tube and the length of the metallic round tube is 1 / 6 to 1 / 5. By adjusting the ratio between the distance between the tip of the discharge needle and the air inlet of the metallic round tube and the length of the metallic round tube to 1 / 6 to 1 / 5, a more stable corona region can be formed in the area of ​​the metallic round tube close to the air inlet. This increases the degree of ionization of the air in the corona region, increases the amount of charge applied to particles and microorganisms, and ultimately allows particles and microorganisms to be completely adsorbed and retained on the wall of the adsorption region, thereby improving the retention effectiveness of the corona disinfection module of the present utility model for particles and microorganisms in the air. The corona disinfection module of the present utility model does not require an extension of the length of the metallic round pipe or the additional arrangement of multi-layer dust filters, thereby reducing the thickness of the corona disinfection module, saving the installation space, and reducing the installation difficulty.

[0006] In some embodiments, the length of the metallic round tube is 1.25 to 1.5 times the diameter of the metallic round tube.

[0007] By setting the length of the metallic round tube to 1.25 to 1.5 times the diameter of the metallic round tube, the adsorption region formed in the metallic round tube can fully adsorb and retain particles and microorganisms in the air, and prevent the coaxiality between the discharge needle and the metallic round tube from being reduced due to excessive length of the adsorption region, which ultimately leads to excessive ozone emission, as well as the overall thickness of the corona disinfection module from becoming too large.

[0008] In some embodiments, the distance between the positively conductive grid plate and the air outlet of the metallic round tube is at least 1 / 2 the length of the metallic round tube.

[0009] It is prevented that the distance between the positive conductive grid plate and the air outlet of the metallic round tube is too small, which would cause the air between the positive conductive grid plate and the air outlet of the metallic round tube to be completely ionized and conductive, the tip of the discharge needle cannot carry out stable discharge, and ultimately the disinfection and sterilization effect and dust removal performance of the corona disinfection module would be affected.

[0010] In some embodiments, the deviation value between the axis of the discharge needle and the axis of the corresponding metallic round tube is not more than 0.1 mm.

[0011] The coaxial arrangement of the discharge needle and the metallic round tube enables uniform discharge of the needle tip and prevents excessive ozone emission.

[0012] In some embodiments, the positively conductive grid plate is provided with a plurality of insulating connecting pins, and the negatively conductive hole plate is fixedly connected to the positively conductive grid plate via the insulating connecting pins.

[0013] The insulated connection between the positive conductive grid plate and the negative conductive perforated plate is realized, which keeps the negative conductive perforated plate and the positive conductive grid plate parallel to each other and ensures the structural stability and uniform thickness of the corona disinfection module.

[0014] In some embodiments, a plurality of metallic round tubes are arranged in a dense honeycomb arrangement on the negatively conductive perforated plate.

[0015] The arrangement of several metallic round tubes in a dense honeycomb arrangement on the negatively conductive perforated plate increases the space utilization of the negatively conductive perforated plate, thereby correspondingly increasing the airflow through the corona disinfection module and ultimately improving the air purification effect of the corona disinfection module. Furthermore, the arrangement of several metallic round tubes in a dense honeycomb arrangement on the negatively conductive perforated plate can reduce the air resistance of the negatively conductive perforated plate, thereby reducing noise and energy consumption.

[0016] In some embodiments, both the negatively conductive hole plate and the positively conductive grid plate are made of aluminum alloy plates and formed by cutting, and the negatively conductive hole plate and the positively conductive grid plate have the same thermal expansion coefficient.

[0017] The negative conducting hole plate and the positive conducting grid plate are formed from aluminum alloy plates with the same thermal expansion coefficient by cutting, which ensures that the negative conducting hole plate and the positive conducting grid plate have good conductivity and prevents the negative conducting hole plate and the positive conducting grid plate from deforming too differently under temperature changes, which would lead to a significant change in the relative position between the discharge needle and the metallic round tube and a reduction in their coaxiality.

[0018] In some embodiments, the metallic round tube is formed from aluminum alloy tubes by cutting.

[0019] The present utility model provides a simple method of manufacturing the metallic round tube.

[0020] In some embodiments, the tip of the discharge needle has a rounded head formed by grinding, and the rear end of the discharge needle is riveted at the intersection point of the grid of the positively conducting grid plate.

[0021] Riveting the rear end of the discharge needle at the intersection point of the positive-conducting grid plate can improve the installation strength of the discharge needle on the positive-conducting grid plate. Grinding the tip of the discharge needle into a rounded head can improve the discharge stability of the discharge needle tip.

[0022] In some embodiments, the discharge needle is made of a stainless steel-based alloy.

[0023] On the basis of ensuring the discharge performance of the discharge needle, the heat resistance, oxidation resistance and corrosion resistance of the discharge needle are improved, and the service life of the discharge needle is extended. Description of the attached drawings Fig. 1 is a schematic side view of the local structure of a corona disinfection module according to an embodiment of the present utility model; Fig. 2 is a schematic plan view of the local structure of the corona disinfection module according to an embodiment of the present utility model; and Fig. 3 is a schematic sectional view of the local structure of the corona disinfection module according to an embodiment of the present utility model.

[0024] In the Fig. 1 to 3 contain the following components: negatively conductive perforated plate 1, metallic round tube 2, discharge needle 3, positively conductive grid plate 4, insulating connecting pin 5, screw 6, air outlet 7, air inlet 8, corona region 9, adsorption region 10, and ion air 11. Examples of implementation

[0025] The present utility model is described in more detail below using specific embodiments in conjunction with the accompanying drawings. In different embodiments, similar elements are provided with corresponding, similar reference numerals. In the following embodiments, many detailed descriptions are included to enable a better understanding of the present utility model. However, it will be readily apparent to those skilled in the art that some of the features may be omitted under various circumstances or may be replaced by other elements, materials, or methods. In some cases, some processes associated with the present utility model are not shown or described in the description to avoid obscuring the essence of the present utility model with excessive descriptions.For experts in the field, a detailed description of these related operations is not required, as they can fully understand the relevant operations based on the description in the specification and general knowledge in the field.

[0026] Furthermore, the features, acts, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. At the same time, the steps or acts in the method description may be rearranged or adapted in a manner that would be obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are intended merely to clearly describe a particular embodiment and do not imply a mandatory order unless indicated that a particular order should be followed.

[0027] As described in the background section, existing corona disinfection modules exhibit relatively weak adsorption capacity of the metallic cylinder wall for particles and microorganisms (i.e., dust removal capacity). To address this deficiency, one alternative solution is to extend the length of the metallic cylinder, and another alternative solution is to additionally arrange multi-layer dust filters on the front or rear of the corona disinfection module. Both of these solutions result in an increase in the thickness of the disinfection module, which in turn increases the installation space and installation difficulty.

[0028] To solve the aforementioned problems, the present utility model provides a corona disinfection module. Referring to the Fig. 1 to 3, the corona disinfection module according to an embodiment of the present utility model comprises a negatively conductive perforated plate 1 and a positively conductive grid plate 4, which are arranged at a distance from each other, wherein: the negatively conductive perforated plate 1 is provided with a plurality of round mounting holes, a metallic round tube 2 is attached to each mounting hole, the opening of the metallic round tube 2 on the side near the mounting hole serves as an air inlet 8, and the other opening of the metallic round tube 2 serves as an air outlet 7; the positively conducting grid plate 4 is provided with a plurality of discharge needles 3 which are arranged in a uniquely corresponding manner to the metallic round tubes 2, and the tip of each discharge needle 3 projects through the associated air outlet 7 of the metallic round tube 2 into the metallic round tube 2.

[0029] As in Fig. As shown in Figure 3, the optional operation of the corona disinfection module of the present utility model is as follows: The power supply is switched on so that the positive electrode and the negative electrode of the power supply are connected via lines to the positively conducting grid plate 4 and the negatively conducting perforated plate 1, respectively.

[0030] The tip of the discharge needle 3 discharges, creating an electric field between the discharge needle 3 and the inner wall of the metallic round tube 2. The electric field is divided into a corona region 9 and an adsorption region 10, with the corona region 9 being close to the air inlet 8 of the metallic round tube 2, and the tip of the discharge needle 3 being located in the corona region 9. The adsorption region 10, on the other hand, is close to the air outlet 7 of the metallic round tube 2. Furthermore, ionic air 11 forms outside the air inlet 8 of the metallic round tube 2.

[0031] The air in the corona region 9 is ionized, generating a large number of radicals as well as positive and negative ions, which strongly oxidatively disinfect the air flowing through the metallic round tube 2. At the same time, positive and negative ions condense on particles and microorganisms and are ultimately adsorbed on the wall of the adsorption region 10, thereby achieving retention of particles and microorganisms in the air. Specifically, in the embodiment of the present invention, the ratio between the distance between the tip of the discharge needle 3 and the air inlet 8 of the metallic round tube 2 and the length of the metallic round tube 2 is 1 / 6 to 1 / 5. In other words, the distance between the tip of the discharge needle 3 and the air inlet 8 of the metallic round tube 2 accounts for 1 / 6 to 1 / 5 of the total length of the metallic round tube 2.

[0032] If the ratio between the distance between the tip of the discharge needle 3 and the air inlet 8 of the metallic round tube 2 and the length of the metallic round tube 2 is less than 1 / 6, the tip of the discharge needle 3 is too close to the air inlet 8, the corona region 9 becomes thin and unstable, and the ionization degree of the air is too low. This reduces the amount of charge applied to particles and microorganisms, ultimately resulting in particles and microorganisms not being effectively retained in the adsorption region 10.

[0033] On the other hand, if the ratio between the distance between the tip of the discharge needle 3 and the air inlet 8 of the metallic round tube 2 and the length of the metallic round tube 2 is greater than 1 / 5, the tip of the discharge needle 3 is too far from the air inlet 8, so that the longer section of the metallic round tube 2, which is close to the air inlet 8, is unable to generate an electric field together with the discharge needle 3. This renders this section of the tube useless and ultimately shortens the length of the adsorption region 10, which also leads to a deterioration in the retention effectiveness for particles and microorganisms.

[0034] By setting the ratio between the distance between the tip of the discharge needle 3 and the air inlet 8 of the metallic round tube 2 and the length of the metallic round tube 2 to 1 / 6 to 1 / 5, a more stable corona region 9 can be formed in the area of ​​the metallic round tube 2 close to the air inlet 8. This increases the degree of ionization of the air in the corona region 9, increases the amount of charges applied to particles and microorganisms, and ensures a sufficiently long length of the adsorption region 10. Ultimately, particles and microorganisms are completely adsorbed and retained on the wall of the adsorption region, thereby improving the retention effectiveness for particles and microorganisms in the air.

[0035] Optionally, the length of the metallic round tube 2 is 1.25 to 1.5 times the diameter of the metallic round tube 2.

[0036] When the length of the metallic round tube 2 is less than 1.25 times the diameter of the metallic round tube 2, the adsorption area 10 becomes too short, and a large number of particles and microorganisms in the air quickly pass through the adsorption area 10 due to the air velocity, which reduces the retention rate of particles and microorganisms and makes it difficult to meet the air purification requirements.

[0037] Conversely, if the length of the metallic round tube 2 is greater than 1.5 times the diameter of the metallic round tube 2, the adsorption area 10 becomes longer, and particles and microorganisms can be fully adsorbed and retained in the adsorption area. However, due to the excessive length of the metallic round tube 2 relative to its diameter, the coaxiality between the discharge needle 3 and the metallic round tube 2 decreases, which ultimately leads to excessive ozone emission of the corona disinfection module during operation. In addition, an excessive length of the metallic round tube 2 results in an excessive overall thickness of the corona disinfection module, which increases the installation space and installation difficulty.

[0038] By setting the length of the metallic round tube 2 to 1.25 to 1.5 times the diameter of the metallic round tube 2, the adsorption region 10 formed in the metallic round tube 2 can fully adsorb and retain particles and microorganisms in the air, and it prevents the coaxiality between the discharge needle 3 and the metallic round tube 2 from being reduced due to an excessive length of the adsorption region 10, which ultimately leads to excessive ozone emission, as well as the overall thickness of the corona disinfection module from becoming too large.

[0039] Optionally, the distance between the positively conductive grid plate 4 and the air outlet 7 of the metallic round tube 2 is at least 1 / 2 the length of the metallic round tube 2.

[0040] This adjustment prevents the distance between the positively conductive grid plate 4 and the air outlet 7 of the metallic round tube 2 from being too small, which would cause the air between the positively conductive grid plate 4 and the air outlet 7 of the metallic round tube 2 to become completely ionized and conductive, preventing the tip of the discharge needle 3 from performing stable discharge, and ultimately affecting the disinfection and sterilization effect and dust removal performance of the corona disinfection module. As those skilled in the art know, the coaxial arrangement of the discharge needle 3 and the metallic round tube 2 is a necessary condition for uniform discharge of the tip of the discharge needle 3, thereby limiting ozone emission. Therefore, the deviation value between the axis of the discharge needle 3 and the axis of the corresponding metallic round tube 2 is optionally no more than 0.1 mm.

[0041] As in Fig. 1, the positively conductive grid plate 4 is optionally provided with a plurality of insulating connecting pins 5, and the negatively conductive perforated plate 1 is firmly connected to the positively conductive grid plate 4 via the insulating connecting pins 5.

[0042] This realizes the insulated connection between the positively conductive grid plate 4 and the negatively conductive perforated plate 1, keeping the negatively conductive perforated plate 4 and the positively conductive grid plate 1 parallel to each other, and ensuring the structural stability and uniform thickness of the corona disinfection module.

[0043] The insulating connecting pins 5 can be screwed to the positively conducting grid plate 4, for example, using screws 6. High-strength plastic pins with good insulating performance can be used as insulating connecting pins 5.

[0044] As in Fig.As shown in Figure 2, a plurality of metallic round tubes 2 are arranged in a dense honeycomb pattern on the negatively conductive perforated plate 1. Arranging a plurality of metallic round tubes 2 in a dense honeycomb pattern on the negatively conductive perforated plate 1 increases the space utilization of the negatively conductive perforated plate 1, thereby correspondingly increasing the airflow through the corona disinfection module and ultimately improving the air purification effect of the corona disinfection module. Furthermore, arranging a plurality of metallic round tubes 2 in a dense honeycomb pattern on the negatively conductive perforated plate 1 can reduce the air resistance of the negatively conductive perforated plate, thereby reducing noise and energy consumption.

[0045] Optionally, the metallic round tubes 2 are fixed in the corresponding mounting holes of the negatively conductive perforated plate 1 by means of a tube expanding and rolling process.

[0046] To simplify manufacturing and ensure good conductivity of the negatively conductive perforated plate 1 and the positively conductive grid plate 4, both the negatively conductive perforated plate 1 and the positively conductive grid plate 4 are optionally made of aluminum alloy plates and formed by cutting. In particular, the negatively conductive perforated plate 1 and the positively conductive grid plate 4 have the same thermal expansion coefficient.

[0047] Since the negatively conductive perforated plate 1 and the positively conductive grid plate 4 have the same thermal expansion coefficient, the negatively conductive perforated plate 1 and the positively conductive grid plate 4 are prevented from deforming too differently under temperature fluctuations, which leads to a significant change in the relative position between the discharge needle 3 and the metallic round tube 2 and impairs their coaxiality.

[0048] Optionally, the metallic round tube 2 is formed from aluminum alloy tubes by cutting.

[0049] Optionally, the tip of the discharge needle 3 has a rounded head formed by grinding, and the rear end of the discharge needle 3 is riveted at the intersection point of the grid of the positive conducting grid plate.

[0050] By arranging a rounded head at the tip of the discharge needle 3, the discharge uniformity of the tip of the discharge needle 3 can be further improved. Riveting the rear end of the discharge needle 3 at the intersection point of the grid of the positive conduction grid plate 4 ensures the installation strength of the discharge needle 3 on the positive conduction grid plate 4. Optionally, the discharge needle 3 is made of a stainless steel-based alloy. This design improves the heat resistance, oxidation resistance, and corrosion resistance of the discharge needle 3 on the basis of ensuring its discharge performance and thus extending its service life.

[0051] The present utility model has been described above in sufficient detail and with a certain degree of specificity. Those of ordinary skill in the art should understand that the description in the embodiments is merely exemplary. Any changes made without departing from the true spirit and scope of the present utility model will fall within the scope of the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims, not by the above descriptions in the embodiments.

Claims

[1] A Corona disinfection module, characterized by , that the Corona disinfection module comprises a negatively conductive perforated plate and a positively conductive grid plate, which are arranged at a distance from each other, wherein: The negatively conductive perforated plate is provided with several mounting holes, a metallic round tube is attached to each mounting hole, the opening of the metallic round tube on the side near the mounting hole serves as an air inlet, and the other opening of the metallic round tube serves as an air outlet; the positively conductive grid plate is provided with several discharge needles, which are clearly arranged corresponding to the metallic round tubes, and the tip of each discharge needle protrudes through the associated air outlet of the metallic round tube into the metallic round tube; and the ratio between the distance between the tip of the discharge needle and The air inlet of the metallic round tube and the length of the metallic round tube is 1 / 6 to 1 / 5. [2] The Corona disinfection module according to claim 1, characterized by , that the length of the metallic round tube is 1.25 to 1.5 times the diameter of the metallic round tube. [3] The Corona disinfection module according to claim 1, characterized by , that the distance between the positively conductive grid plate and the air outlet of the metallic round tube is at least 1 / 2 the length of the metallic round tube. [4] The Corona disinfection module according to claim 1, characterized by that the deviation value between the axis of the discharge needle and the axis of the corresponding metallic round tube is no more than 0.1 mm. [5] The Corona disinfection module according to claim 1, characterized by, that the positively conductive grid plate is provided with several insulating connecting pins, and the negatively conductive perforated plate is firmly connected to the positively conductive grid plate via the insulating connecting pins. [6] The Corona disinfection module according to claim 1, characterized by , that several metallic round tubes are arranged in a dense honeycomb pattern on the negatively conductive perforated plate. [7] The Corona disinfection module according to claim 1, characterized by , that both the negatively conductive perforated plate and the positively conductive grid plate are made from aluminium alloy plates and shaped by cutting, and that the negatively conductive perforated plate and the positively conductive grid plate have the same coefficient of thermal expansion. [8] The Corona disinfection module according to claim 1, characterized by , that the metallic round tube is formed from aluminium alloy tubes by cutting. [9] The Corona disinfection module according to claim 1, characterized by , that the tip of the discharge needle has a rounded head formed by loops, and the rear end of the discharge needle is riveted at the intersection of the grid of the positively conducting grid plate. [10] The Corona disinfection module according to claim 1, characterized by that the discharge needle is made of a stainless steel base alloy.

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