CN201724320U - Air disinfection purification central air conditioner - Google Patents

Abstract

The utility model belongs to the technical field of air disinfection purification, in particular to an air disinfection purification central air conditioner, which comprises a main air conditioner, a plasma reactor, a pulse power supply, a main fan, a return air fan, a controller, a fresh air opening, an air outlet and a ventilation pipe, wherein a positive electrode and a negative electrode are arranged in the plasma reactor, the positive electrode is made up of a plurality of anti-oxidized metal belts which are arranged in parallel in the same plane, and the negative electrode is made from aluminum plates or stainless steel plates. The air disinfection purification central air conditioner is further provided with a micro-discharge resistance conductive rail which is made from an aluminum bar or a stainless steel bar, and the two ends of the positive electrode are respectively fixed on the micro-discharge resistance conductive rail. The air disinfection purification central air conditioner can adjust indoor temperature and humidity, also can effectively kill bacteria and viruses, degrades TVOC, eliminates peculiar smell, and wipes off granular aerosols. The air disinfection purification central air conditioner saves energy, and has excellent reliability. The utility model is specially designed for air disinfection purification central air conditioners, and is a central air conditioner for fields of hospitals, clean rooms, office buildings, malls, hotels and subways and the like.

Description

Air disinfection and purification central air conditioner

Technical field:

The utility model belongs to the technical field of air disinfection and purification, in particular to a central air conditioner for air disinfection and purification. the

Background technique:

With the development of society and the advancement of science and technology, people's living standards continue to improve, making various types of central air conditioners quickly enter public places such as hospitals, clean rooms, office buildings, shopping malls, hotels, theaters, airports, subways and underground buildings. , using central air conditioning to adjust temperature, humidity and cleanliness, creating a comfortable indoor environment for people. All kinds of buildings are mostly closed, indoor electrical equipment, decoration materials and personnel activities produce harmful gases, viruses, bacteria and aerosols and other pollutants, causing many people to suffer from eye and throat irritation, nasal congestion, headache, dizziness, chest tightness, Lethargy and other symptoms - Sick Building Syndrome (SBS for short). Especially Legionnaires' disease, SARS, bird flu in the past few years, and the outbreak of H1N1 influenza virus at this stage, the latest epidemic bulletin issued by the World Health Organization stated that the death toll of influenza A in the world exceeded 10,000, of which the United States accounted for the majority. department. The control of indoor environmental pollution has attracted more and more people's attention, and has aroused the attention and attention of domestic environmental protection experts and governments. the

Most of the virus and bacterial microorganisms in the air exist in the form of dispersed granular aerosols. In public places, the flow of people is large, and the more dust particles there are, the higher the microbial content will be. The number of dust particles in the air is directly proportional to the concentration of air bacteria. According to the US CDC survey, there is a risk of infection when the concentration of bacteria in the floating matter in the air is 700-1800cfu/m ³ . Infectious pathogens are usually attached to suspended particles ≤ 5 μm in the air, and spread with the air flow in the form of aerosols. Infected people become sick due to inhalation of this air, resulting in cross-infection. The use of central air-conditioning increases the incidence of cross-infection.

For this reason, professionals research and improve the disinfection and purification facilities of central air-conditioning, and the technical solutions are nothing more than ultraviolet-type, ozone-type, electrostatic-type, plasma-type and other air disinfection and purification devices. the

The electrostatic air disinfection and purification device uses the principle of high-voltage electrostatic attraction of opposites to absorb bacteria in dust. Electrostatic air purification device - use anode discharge to make the particles in the air positively charged, and under the action of Coulomb force, the positively charged particles are captured on the negatively charged dust collection device. It is composed of ionization device, dust collection device, air supply device, high-voltage power supply and other components. It can capture particles above Φ0.01μm, with small wind resistance and a dust removal efficiency of over 90%. The disadvantage is that the ability to decompose harmful bacteria, viruses and organic pollutants in the air is low; bacteria, viruses and particles are captured on the negatively charged dust collection device, when the dust particles on the electrode plate accumulate more and cannot be cleaned in time , there is a risk of secondary pollution. the

Ozone-type air disinfection and purification device (called high-energy electronic type in the market):

It uses a high-frequency electric field to apply a surface discharge on two electrodes separated by a dielectric, and accumulates a large number of positive or negative electrons on the surface of the dielectric to interact with molecules in the air; it also uses the corona discharge method to generate ozone and other substances. When the high-energy ion reaction section works, high-energy and high-concentration ion groups are generated, in which positive ions can penetrate the bacterial cell wall and penetrate deep into the cell wall, destroying the balance of cell electrolytes, damaging the cell membrane, and causing the rapid death of bacteria and viruses. Oxygen ions generated when the high-energy ion reactor works have extremely strong oxidation activity, which can break the chains of biological macromolecules such as DNA and ANA, destroy the molecular structure of proteins, and kill microorganisms; it can also degrade TVOC and eliminate odors. Effectively avoid dirt residue, no secondary pollution. the

Disadvantages: Ozone is a strong oxidant, so it should not be used in places where there is direct contact with flammable and explosive gases; Ozone has weak penetrating power, low ability to kill bacteria deep in objects, and cannot collect dust. The disadvantage is that once ozone leaks, it will cause damage to the human respiratory tract, and it has been gradually eliminated by hospital operating rooms and wards. the

Ultraviolet air disinfection and purification type (UV):

Ultraviolet sterilization uses a low-pressure mercury vapor discharge tube to radiate ultraviolet rays with a wavelength of 253.7nm under the action of a high-voltage electric field to kill bacteria, viruses and other microorganisms. The ultraviolet sterilizing system sterilizes and disinfects the air sent by the fan, and at the same time degrades organic matter and odor. the

The main disadvantages are: ultraviolet rays are invisible light, which is easy to leak and cause damage to human eyes and skin; the working life of ultraviolet lamps is only 8000 hours. The problem is that the ^100m3 room meets the Ministry of Health’s Class II environmental standard for hospitals. The energy consumption of ultraviolet rays and ozone to achieve the same disinfection effect is similar, which is 160-240W; especially the existence of the above defects, which is rarely used in hospitals at present. reason.

The disinfection and purification effect of the plasma-type air disinfection and purification device is remarkable, which is not inferior to the above-mentioned types in terms of killing bacteria, viruses and other microorganisms; degrading organic matter and capturing particles above Φ0.01 μm. the

In the past few years, there were many papers and patents in this area, but in the past four or five years, the market has been gradually replaced by electrostatic air-purifying air conditioners with serrated discharge electrodes. According to investigation and analysis, the main reason is that the metal wire of the discharge positive electrode in the plasma type air disinfection and purification device is easily broken, and the ozone that is changed into a sawtooth discharge electrode is too dense and the efficiency is low. the

For example: the application number is 200710015213.1, the publication date: December 24, 2008, the title of the invention: "A Novel Air Conditioning Air Purifier", the independent claim states: it consists of a housing, a transom, and a light purification device, and its characteristics The reason is: the light purification device is arranged on the tube frame in the shell, the light purification device is composed of a glass reference tube and an excitation light source, the excitation light source is arranged in the tube chamber of the glass reference tube, the glass reference tube of the light purification device, the tube wall A photocatalytic layer is provided on the surface. The catalytic layer is a composite material of nanometer TiO ₂ , SiO ₂ or metal ions.

The invention is effective in killing microorganisms such as bacteria and viruses and degrading organic matter and peculiar smell. But there is a glass reference tube and an excitation light source, and the ultraviolet rays will cause damage to human eyes and skin; the glass reference tube has a short working life, and it is self-evident that the excitation light source consumes a lot of energy. the

Another example: the application number is 200610044696.3, the application date: June 8, 2006, the name of the invention: "air-conditioning purification and disinfection device", and the claims state: an air-conditioning purification and disinfection device, which is characterized in that it includes a split cabinet type air conditioner The host machine and the cabinet of the device, the cabinet is equipped with a condenser and a fan, the upper part of the cabinet casing has an air outlet window, the lower part has an air inlet window, and the front has a control panel. The fan corresponds to the air inlet window. An electrostatic precipitator and an adsorption filter are sequentially arranged between the air outlet windows. The electrostatic precipitator includes a serrated discharge electrode, a tubular dust collection electrode and a tubular discharge electrode, a discharge area is formed between the serrated discharge electrode and the tubular dust collection electrode, and a dust collection area is formed between the tubular discharge electrode and the tubular dust collection electrode. the

The serrated discharge electrode of the invention has a long working life, has the effect of purification and disinfection, and has high dust removal efficiency. The disadvantage is that it is sharp discharge, uneven discharge, low ability to decompose harmful bacteria, viruses and organic pollutants in the air, and secondary pollution. the

Invention content:

The utility model aims to solve the defects of the prior art, and provides a device that can not only regulate the indoor temperature and humidity, but also efficiently kill bacteria and viruses, degrade TVOC, eliminate peculiar smell, and remove granular aerosol; and it is energy-saving and reliable. Good air disinfection and purification central air conditioner with long working life. the

In order to achieve the above object, the air disinfection and purification central air conditioner designed by the utility model includes a plasma reactor, a pulse power supply, a main fan, a return fan, a controller, a new air outlet, a clean area, an air outlet, and a main air filter. , Main air conditioner, return air duct, ventilation duct. Said plasma reactor is set in the ventilation duct, the ventilation duct is connected with the clean area, the high voltage output end of the pulse power supply is electrically connected with the plasma reactor; the output end of the controller is connected with the pulse power supply, the main fan and the return air respectively. The power input end of the fan is electrically connected, the main air filter is set at the air inlet of the main fan, the return air duct is arranged at the bottom of the clean area to communicate with the air outlet, and the return air fan is arranged in the return air duct. the

The described plasma reactor is provided with a positive electrode and a negative electrode, and the positive electrode is made of several oxidation-resistant metal strips arranged in parallel at equal distances in the same plane to form an assembly, a total of n groups (n is within 50 Integer); said negative electrode is made of aluminum plate or stainless steel plate, a total of n+1 pieces; the plasma reactor is also provided with several anti-micro-discharge conductive rails made of aluminum rods or stainless steel bars, said The two ends of the positive electrode are respectively fixed on the corresponding positions on the conductive rail for preventing micro-discharge; the two ends of the conductive rail for preventing micro-discharge are respectively provided with an insulating connector, and are fixed in the corresponding installation holes of the reactor shell; The strip prevents the microdischarge conductive track from being electrically connected with an oxidation-resistant wire. the

Preferably, the main air conditioner is provided with a shower and a dehumidifier, the lower end of the shower is provided with a water pump, which is connected with the heat exchanger of the main air conditioner with a water pipe, and the shower is arranged in the ventilation duct. There is an exhaust control valve on the left side of the pipe at the air outlet of the return air fan, which is connected to the air outlet through the exhaust control valve, and a primary return air control valve is provided on the right pipe to communicate with the primary return air pipe, and then connected to the air inlet of the sprinkler. The right pipe is further provided with a secondary return air control valve, which communicates with the secondary return air pipe and is connected between the sprinkler and the dehumidifier. The air inlet of the clean area is provided with a muffler, and the air outlet of the clean area is provided with a return air muffler; the fresh air outlet is sequentially provided with a fresh air air filter, a fresh air control valve, a fresh air conditioner and a plasma reactor, and Connected to the sprinkler inlet port. the

Preferably, the conductive track for preventing micro-discharge is provided with protrusions arranged at equal distances, and the two ends of the positive electrode are the tops of the protrusions respectively fixed on the corresponding conductive track. The convex parts of the micro-discharge preventing conductive rails are symmetrically arranged as one group, and each convex part of the micro-discharge preventing conductive rails is set as n groups, and the top of the convex parts is provided with an outward bend. The two ends of the positive electrode are provided with a stainless steel connection frame, and a square hole is punched in the middle of the stainless steel connection frame, and the elbow at the top of the convex part is inserted into the square hole of the stainless steel connection frame. The negative electrode is provided with a protruding negative electrode fixing pin at the upper and lower ends of the reactor shell, and grooves are opened at the corresponding parts of the reactor shell for butt joint fastening. the

Preferably, the micro-discharge conductive rail is provided with equidistantly arranged recesses, and the recesses are set to n groups, and the two ends of the positive electrode are respectively fixed on the corresponding recesses of the micro-discharge conductive rail; the two ends of the micro-discharge conductive rail are prevented The end is fixed with four positive electrode metal brackets arranged orthogonally around the reactor, and is electrically connected; the outer edge of the positive electrode metal bracket is provided with several cylindrical fixed rings for preventing micro-discharge conductive rails to prevent micro-discharge. Conductive rail fixing rings are equally spaced apart adjacent micro-discharge preventing conductive rails; the upper and lower ends of each positive electrode metal bracket are respectively provided with an insulating connector to be fixed to the corresponding mounting hole of the shell. the

Preferably, the surface of the negative electrode is made of an oxidized aluminum plate, and the two sides of the negative electrode are covered with nanometer TiO ₂ .

Preferably, a semiconductor switch tube Q1 and a pulse step-up transformer are arranged in the pulse power supply, and the semiconductor switch tube Q1 and the pulse step-up transformer are set according to a single-ended flyback inverter circuit. The drain D of the semiconductor switching tube Q1 is connected to the same terminal a1 of the primary coil of the pulse step-up transformer, the source S of the switching tube Q1 is connected to the negative pole of the input DC power supply through the current limiting resistor R1, and the negative terminal of the primary coil is b1 is connected to the DC positive pole of the input direct current power supply. The same-named ends a1, a2 and the different-named ends b1, b2 of the primary coil and the secondary coil are set in reverse. The pulse step-up transformer is provided with a multi-slot insulated bobbin, and the secondary coil is divided into three sections, five to seven sections and wound in series in corresponding grooves of the multi-slot insulated bobbin; each wire A high-voltage fast recovery diode is arranged on each of the upper ends of the package. The anode of the high-voltage fast recovery diode is connected to the end of the low-potential line package, and the negative pole of the high-voltage fast recovery diode is connected to the starting end of the high-potential line package. the

Preferably, the inner holes of the primary coil and the secondary coil are provided with a magnetic core for electromagnetic coupling, and a magnetic air gap is provided in the magnetic circuit of the magnetic core; the optimal design of the magnetic core is an iron-based ultrafine crystal iron core , can also set the ferrite core. the

Preferably, the G pole of the switching tube Q1 is provided with a driving circuit IC, and the driving circuit IC is provided with an oscillator ZTC, an error amplifier WCF and a comparator PWM, and the driving circuit IC is made into a module; switching power supply control can also be selected. IC UC3842 class replacement. the

Preferably, the positive electrode is made of oxidation-resistant high-resistance electrothermal alloy, or iron-chromium-aluminum alloy material; the width of the metal strip is 1-2mm, and the thickness is 0.05mm-0.20mm. the

Compared with the prior art, the utility model has the following beneficial effects:

The utility model is equipped with a plasma air disinfection purifier, a pulse power supply, and a main air conditioner, which can not only disinfect and purify, but also adjust the indoor air temperature. Create a comfortable indoor environment for people. . the

In particular, the positive electrodes in the plasma reactor are made of oxidation-resistant metal strips arranged in parallel at equal distances in the same plane; the negative electrodes are made of aluminum plates or stainless steel plates, and there are also several strips made of aluminum rods or The anti-micro-discharge conductive rail made of stainless steel strips, the two ends of the positive electrode are respectively fixed on the corresponding positions on the anti-micro-discharge conductive rail. Therefore, compared with the prior art, the micro-discharge effect in the plasma reactor is prevented, so that each positive electrode performs a stable corona discharge in the strong electric field of the pulse power supply to obtain high-intensity plasma. Compared with the discharge electrode which is sawtooth or needle-shaped and in the tip discharge state, the positive electrode of the metal strip is uniformly discharged along the belt, and the plasma intensity obtained is 2-4 times that of the sawtooth or needle-shaped, It can efficiently kill bacteria and viruses, degrade TVOC and eliminate odors. The high-voltage electrostatic field in the plasma reactor can absorb aerosols with a particle size as small as 0.01 μm. After actual measurement: artificially spraying Staphylococcus albicans in the air of a ^20m3 sealed room, a rated power of 7W can kill more than 99.98% after 20 minutes of work, and the kill rate can be as high as 100% after 40 minutes of work. The formaldehyde degradation rate is 98.7%, the number of suspended particles is ≤350/L (Φ≥0.5μm), and the amount of ozone retained in the air is ≤0.02mg/m ³ .

Furthermore, the output high-voltage pulse rise time of the pulse power supply designed by the utility model is short. After research, in order to make the capacitive plasma reactor generate more high-energy electrons in the indoor environment, excite gas molecules to ionize or dissociate, and generate strong oxidizing free radicals, it is best to use narrow pulses (pulse width of several μS, The rise time is tens to hundreds of nS) discharge current. In a very short period of time, electrons are accelerated to become high-energy electrons, while other ions with larger protons are unable to be accelerated by electrons at the moment of the pulse due to inertia, and basically remain static. The nitrogen and oxygen in the air will not be activated, and the ozone and nitrogen oxides produced are ≤0.02mg/M ³ . The actual measurement results verify the above research results.

The focus of the development of this utility model is: when the metal strip of the positive electrode is used for corona discharge in the reactor, after sputtering causes electrode loss, the metal strip loss will be far away from the negative electrode plate due to the defect, and the discharge current will naturally decrease. Small; on the contrary, the discharge current in the part with less metal loss will automatically increase. In this way, the loss of the positive electrode is in a state of self-regulation, and its working life is further extended. The effective working life of the positive electrode can reach 8--12 years, and an unexpected effect is obtained. the

The utility model can not only adjust the indoor temperature and humidity, but also efficiently kill bacteria and viruses, degrade TVOC, eliminate peculiar smell, and remove granular aerosol; and it is an air disinfection and purification central air conditioner with energy saving, good reliability and long working life . the

Another research achievement of the utility model is to discover the "micro-discharge phenomenon" in the plasma reactor and to propose a conductive rail technical solution to prevent the micro-discharge. the

Plasma has been used in air disinfection and purification equipment for more than ten years. In the past, the positive electrode of the plasma reactor was made of thin metal wire with excellent corona discharge, but in recent years it has been replaced by a jagged or needle-like structure. The serrated or needle-like structure is the first choice for electrostatic air disinfection and purification equipment, and it is not ideal for plasma reactors. The reason is that the discharge life of thin metal wires is mostly three or four months. Most of the manufacturers of air disinfection purifiers that use sawtooth or pointed needle-shaped structure for the positive electrode of plasma reactor discharge have made metal wires before. Plasma reactor as positive electrode. It is because of the "broken wire" that it has no choice but to change it into a needle-shaped and jagged electrode. the

The Chinese invention patent application number is 200710038821.4, and the title of the invention is "Assembled Building Block Type Narrow-pitch Electrostatic Field Device". Proposed: An assembled building block type narrow-pitch electrostatic field device, including a discharge electrode (the discharge electrode is the positive electrode), a dust collection electrode (the collection electrode is the negative electrode) and an insulator, the discharge electrode and the dust collection electrode are arranged in parallel at intervals, and the discharge electrodes The lower part of the discharge electrode is serrated, the upper part of the discharge electrode is tubular, the serrated discharge electrode and the dust collection electrode form a dust collection area, and the two ends of the dust collection electrode are connected to the collection electrode connector and the discharge electrode connector. and the connecting piece of the receiving electrode are respectively connected to the insulator. the

"The lower part of the discharge electrode is sawtooth-shaped" created by the above-mentioned invention is a last resort. It is a kind of prejudice to prefer to sacrifice the disinfection and purification effect in exchange for the technical solution of the working life of the disinfection purifier. the

After investigation and analysis: in order to solve the insulation problem between the positive and negative electrodes of the plasma reactor, most technicians select insulating materials as supports to directly fix the positive electrode of the plasma reactor wire. Studies have shown that insulating materials with high dielectric constant are good for isolating positive and negative electrodes with high potential, but the Achilles' heel is that "micro-discharge phenomenon" will occur in the plasma reactor. The higher the dielectric constant of the material, the more severe the surface micro-discharge phenomenon. In order to improve the disinfection and purification effect, the external power supply voltage of the plasma reactor is often increased, which is a strong electric field formed around the positive electrode, and under the catalysis of the plasma, local micro-discharges are generated in the contact area between the metal wire and the insulating material. The high-energy electrons produced by this micro-discharge phenomenon play a direct role in the ionization and dissociation of insulating materials and metal conductive material molecules, and the decomposition products are their oxides and water. Here it is, the discharge positive electrode of the plasma reactor selects the root cause of being easily burnt out of thin metal wire. In the prior art, the positive electrode of the plasma reactor selects the root cause of the thin metal wire being easily blown-the micro-discharge effect has not been found, and its physical reason is not clear, so there is no solution to prevent the micro-discharge effect. Technical solutions for discharge effects. The "plasma reactor" of the present invention is also provided with several anti-micro-discharge conductive rails made of aluminum rods or stainless steel bars, and the two ends of the positive electrode are respectively fixed on the corresponding positions on the anti-micro-discharge conductive rail The above" is based on the "micro-discharge effect" in the plasma reactor. the

It can be seen that the utility model is not obvious to those skilled in the art, and can produce unexpected technical effects. the

Description of drawings:

Fig. 1 is the utility model air disinfection and purification central air conditioner sectional structure schematic diagram;

Fig. 2 is the three-dimensional structural diagram of plasma reactor half section of the present utility model;

Fig. 3 is the structure schematic diagram of preventing micro-discharge conductive rail of the present utility model;

Fig. 4 is the three-dimensional structural diagram of another embodiment of the plasma reactor of the present utility model;

Fig. 5 is the electric schematic diagram of the pulse power supply of the present utility model;

Fig. 6 is the structural representation of the pulse step-up transformer of the present utility model;

Fig. 7 is the pulse step-up transformer circuit diagram of the present utility model;

Fig. 8 is a waveform diagram of the output high voltage discharge current of the pulse step-up transformer of the present invention. the

Explanation of reference signs of main components:

1-plasma reactor 2-pulse power supply 3a-main fan

3b-Return air fan 4-Controller 5-Fresh air outlet

6-Clean area 7-Air outlet 8-Main air filter

9-fresh air filter 10-fresh air conditioner 11-dehumidifier

12-Return air silencer 13-Sprinkler 14-Secondary return air duct

15-main air conditioner 16-return air duct 17-ventilation duct

18-Primary return air duct 19-Fresh air control valve 20-Exhaust air control valve

21-Primary return air control valve 22-Secondary return air control valve 23-Muffler

101-Positive Electrode 102-Negative Electrode 103-Prevent Micro-discharge Conductor Rails

105-insulation connector 108-reactor shell 109-convex part

110-Stainless steel connection frame 111-Negative electrode fixing pin 212-Multi-slot insulating coil skeleton

214-Primary coil 215-Secondary coil 216-Pulse step-up transformer

217-High voltage fast recovery diode 218-Magnetic air gap

Detailed ways:

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings. the

Example 1:

Fig. 1 is the air disinfection and purification central air conditioner of the present utility model, including plasma reactor 1, pulse power supply 2, main fan 3a, return air fan 3b, controller 4, fresh air outlet 5, clean area 6, air outlet 7, main Air filter 8, main air conditioner 15, return air duct 16, ventilation duct 17; The reactor 1 is electrically connected, the output end of the controller 4 is electrically connected to the power input end of the pulse power supply 2, the main fan 3a and the return air fan 3b respectively, the main air filter 8 is located at the air inlet of the main fan 3a, and the clean area 6 A return air duct 16 is provided at the bottom to communicate with the air outlet 7 , and the return air fan 3 b is arranged in the return air duct 16 . The described plasma reactor 1 is provided with a positive electrode 101 and a negative electrode 102. The positive electrode 101 is arranged in the same plane by a plurality of oxidation-resistant metal strips and arranged in parallel at equal distances to form an assembly, a total of n groups ( n is an integer within 50); the negative electrode 102 is made of aluminum plate or stainless steel plate, a total of n+1 pieces; the plasma reactor is also provided with several bars made of aluminum rods or stainless steel bars to prevent micro-discharge conduction rail 103, the two ends of the positive electrode 101 are respectively fixed on the corresponding positions on the micro-discharge conductive rail; the two ends of the micro-discharge conductive rail 103 are respectively provided with a conductive rail insulating support 105, and are fixed on the reaction rail. In the corresponding mounting holes of the device housing 108; several anti-micro-discharge conductive rails 103 are electrically connected with oxidation-resistant wires. the

A medium-efficiency air filter can be added to the air inlet of the plasma reactor to reduce the amount of particulate matter adsorbed by the plasma reactor. The corona discharge electric field of the positive electrode 101 of several oxidation-resistant metal strips is uniformly distributed along the radial direction of the positive electrode 101 . In the implementation, select the same volume of reactors with the above-mentioned different structures of positive electrodes, the positive and negative electrode discharge distances are also the same, including conditions such as power supply configuration, the plasma concentration produced by the reactor made of oxidation-resistant metal band positive electrode 101 It is more than twice that of the serrated or needle-shaped positive electrode reactor, and the measured ozone index is only a quarter of that of the serrated or needle-shaped positive electrode reactor, which meets the national "Indoor Air Quality Standards" for ozone The amount ≤ 0.16mg/m ³ regulation.

Reactor shell 108 can be the iron plate that is coated with anti-oxidation layer such as zinc, nickel, also available aluminum or stainless steel plate rolling forms. It must be noted that the two sides parallel to the negative electrode 102 of the reactor shell 108 of the present invention also serve as the negative electrode, which not only has a compact and simple structure, saves materials, but also has a solid overall structure and stable performance. the

Example 2:

The main air conditioner 15 described in the utility model is provided with a shower 13 and a dehumidifier 11, and the lower end of the shower 13 is provided with a water pump 27, which communicates with the heat exchanger of the main air conditioner 15 with a water pipe, and the shower 13 Set in the ventilation duct. The left side of the pipeline of the air outlet of the return air fan 3b is provided with an exhaust control valve 20 and the rear pipeline is directly connected to the air outlet 7 . The right side pipeline is provided with a primary return air control valve 21 which communicates with the primary return air duct 18 and then connects to the air inlet of the sprinkler 13, and the right side pipeline is provided with a secondary return air control valve 22 which communicates with the secondary return air duct 14 and then connects to the Between the shower 13 and the dehumidifier 11. When the indoor temperature and humidity are suitable, the secondary return air control valve 22 is directly opened to reduce the power consumption of the main air conditioner. The air inlet of the clean area 6 is provided with a muffler 23, and the air outlet of the clean area 6 is provided with a return air muffler 12 to ensure that the noise in the clean area is less than 45 decibels. The fresh air outlet 5 is provided with a fresh air filter 9 , a fresh air control valve 19 , a fresh air conditioner 10 and a plasma reactor 1 in sequence, and communicates with the air inlet of the shower 13 . Adjust the fresh air control valve 19 so that the fresh air volume is 10--30% of the total air flow, which saves energy and has enough fresh air. the

Example 3:

The anti-micro-discharge conductive rail 103 described in the utility model is provided with convex portions 109 arranged equidistantly, and the two ends of the positive electrode 101 are respectively fixed on the top of the convex portion 109 on the corresponding conductive rail; the micro-discharge conductive rail 103 is prevented Two convex parts 109 symmetrical up and down are set as one group, and each convex part 109 that prevents the micro-discharge conductive rail 103 is set as n groups, and the top of the convex part 109 is provided with an outward elbow; the two ends of the positive electrode 101 are provided with a stainless steel connection frame 110, the middle of the stainless steel connection frame 110 is punched into a square hole, and the elbow at the top of the convex part 109 is inserted into the square hole of the stainless steel connection frame 110; A protruding negative electrode fixing pin 111 is connected with a groove corresponding to the reactor shell 108 for butt fastening. the

The thickness of the negative electrode aluminum plate is set at 1-2.0 mm, the surface is oxidized, the working life is long, and the appearance is bright. Alternatively, the thickness of the stainless steel plate used as the negative electrode 102 is 0.5-1.5 mm. Welding technology is used in the implementation, and there is warping phenomenon. There will be assembly errors when bending the negative electrode 102 and twisting the nails, and the process is not as good as this preferred embodiment. the

The elbow at the top of the convex part 109 is inserted into the square hole of the stainless steel connection frame 110; the convex part 109 is a stainless steel elastic sheet with a thickness of 0.3-1mm. When assembling, the two ends of the stainless steel connection frame 110 and the positive electrode 101 are processed according to the designed length, and then the stainless steel connection frame 110 at both ends is inserted into the corresponding convex part 109 elbow for preventing micro-discharge conductive rails, which is easy to operate and technically The indicators are consistent. the

The elbows of each set of up-and-down symmetrical two convex parts 109 described in the utility model are designed according to the shielding effect distance of the same polarity, and the distance range between the metal strips of each positive electrode 101 is arranged according to 10-30mm. The design range of the discharge distance between the positive electrode 101 and the negative electrode 102 is 6-20 mm. The distance between the positive electrode 101 and the negative electrode 102 is set according to the electric field strength of the external high voltage power supply. the

Example 4:

The anti-micro-discharge conductive rail 103 described in the utility model is provided with recesses arranged at equal distances, and the recesses are set in n groups. The two ends of the conductive rail 103 are fixed and electrically connected with four positive electrode metal supports 104 which are arranged orthogonally around the reactor; the outer edge of the positive electrode metal support 104 is provided with several cylindrical bars to prevent micro-discharge conduction. Rail fixing ring 107, prevent micro-discharge conducting rail fixing ring 107 from equidistantly apart from adjacent micro-discharging conducting rails 103; each positive electrode metal support 104 is provided with an insulating connector 105 and a shell 108 at the upper and lower ends The corresponding mounting holes are fixed. the

The width and depth of the groove match the metal strip of the positive electrode 101. The advantage is that the positioning is accurate, the metal strip is not easy to shake in the air flow, and the processing technology is simple; the disadvantage is that it is inelastic, and the metal strip of the positive electrode 101 will relaxation. the

Embodiment 5:

The surface of the negative electrode 102 described in the utility model is made of an oxidized aluminum plate, and the two sides of the negative electrode 102 are covered with nano-level TiO ₂ . The ultraviolet light emitted by the plasma reactor itself is used to excite TiO ₂ , and the disinfection factor is the free radical produced by exciting TiO ₂ with low-temperature plasma. Plasma and free radicals are double effective in killing bacteria and viruses, degrading volatile organic compounds and pollutants; also eliminating the need for ultraviolet lamps and ballasts to obtain unexpected effects.

The nanoscale TiO ₂ is an anatase catalyst with a band gap energy of 3.2eV, and the band gap energy value is high.

It is particularly emphasized that the surface of the negative electrode 102 of the plasma reactor is made of an oxidized aluminum plate, and TiO ₂ is easily laid on the upper layer. The Al ₂ O ₃ layer formed by the oxidation treatment is thin, and does not affect the corona discharge in the 18KV _PP narrow pulse high-voltage electric field. When the plasma reactor is subjected to corona discharge, the blue light emitted by the reaction area contains ultraviolet rays, with a wavelength of 300--400nm and a peak light intensity at 357nm. The forbidden band width of TiO ₂ is 3.2eV, and the corresponding ultraviolet wavelength threshold is 387.5nm. Experiments have shown that when _TiO2 is used for air disinfection and purification, the wavelength of the catalytic light source is preferably ≤387.5nm, and the peak wavelength of ultraviolet rays emitted by the reaction zone is at 357nm, which is in line with this condition. In this way, the ultraviolet light source can be omitted, and the disadvantages of damage to the ultraviolet discharge lamp, harm to the human body and large power consumption of the ultraviolet light source are avoided.

Titanium dioxide (TiO ₂ ) photocatalytic purification technology is a high-tech cutting-edge purification technology. Photocatalyst is a photo-semiconductor material that uses a light source to catalyze the decomposition of organic matter. Under the action of ultraviolet light, the energy of the light source excites the gas molecules around TiO ₂ to generate highly active free radicals. These free radicals with strong oxidizing ability can almost decompose most of the organic substances and some inorganic substances, and produce holes with strong oxidizing ability, whose energy is equivalent to a high temperature of 15000K; free radicals can also destroy the cell membrane of bacteria and cause the loss of cytoplasm , and then oxidize the nucleus to kill bacteria. It can directly kill bacteria and completely decompose organic matter into inorganic harmless small molecules such as CO ₂ and H ₂ O to achieve the effects of sterilization, deodorization and air purification. At present, the commonly used photocatalyst is ultra-fine titanium dioxide with strong oxidation ability. The test results of the testing center show that the photocatalyst can kill more than 99% of common bacteria.

The photocatalyst titanium dioxide (TiO ₂ ) photocatalytic purification technology of the utility model relies on the irradiation and catalysis of ultraviolet rays generated by the plasma reactor itself, avoiding the disadvantages of easy damage of ultraviolet discharge lamps and large power consumption; especially to kill bacteria and decompose Organic matter doubles the effect.

Embodiment 6:

Fig. 5 is a schematic diagram of the pulse power supply of the present invention; Fig. 6 is a schematic structural diagram of the pulse transformer of the present invention; Fig. 7 is a circuit diagram of the pulse transformer of the present invention. the

As shown in the figure: the pulse power supply 2 described in the utility model is provided with a semiconductor switching tube Q1 and a pulse boosting transformer 216, and the semiconductor switching tube Q1 and the pulse boosting transformer 216 are set according to a single-ended flyback inverter circuit The semiconductor switching tube Q1 and the pulse step-up transformer provided by the present invention are set by a single-ended flyback inverter circuit, the narrow pulse current rising rate of the inverter output is high, and the ozone and nitrogen oxides produced are ≤0.02mg/ ^M3 .

The drain D of the semiconductor switching tube Q1 is connected to the same terminal a1 of the primary coil 214 of the pulse step-up transformer 216, the source S of the switching tube Q1 is connected to the negative pole of the input DC power supply through the current limiting resistor R1, and the primary coil 214 The opposite terminal b1 is connected to the DC positive pole of the input direct current power supply; the same terminal a1, a2 and the different terminal b1, b2 of the primary coil 214 and the secondary coil 215 are reversely set; the pulse step-up transformer 216 is provided with a multiple The slot insulating bobbin 212 and the secondary coil 215 are wound in three to seven sections and connected in series in the corresponding grooves of the multi-slot insulating bobbin 212; each wire package is provided with a high-voltage fast recovery diode at the upper end 217. The anode of the high-voltage fast recovery diode 217 is connected to the end of the low-potential wire package, and the negative pole of the high-voltage fast recovery diode 217 is connected to the initial end of the high-potential wire package. The pulse power supply 2 is connected to the positive electrode 101 of the plasma reactor with a high-voltage wire 213 . the

The utility model is designed according to the setting of the single-end flyback inverter circuit to obtain the high-frequency narrow-pulse driving current, and there will be no faults such as ignition when the capacitive plasma reactor is working. It must be noted that, in addition to completing the boosting task, the flyback inverter also isolates the connected plasma reactor from the mains. The negative electrode and the shell of the reactor can be directly and safely grounded, and the electromagnetic shielding performance is better. the

At the same time, the unexpected beneficial effect is: the pulse current output by the flyback inverter is the magnetic energy stored in the primary winding of the pulse step-up transformer when Q1 is turned off, and the magnetic energy stored in the primary winding of the pulse step-up transformer is released instantaneously, obtaining 18KV _PP , working frequency _40KHZ , pulse Narrow pulse high-voltage corona discharge current with a width of 4μS and a rise time of 70nS; and when the plasma reactor is accidentally short-circuited, due to the isolation of the flyback pulse transformer, the secondary of the pulse transformer is turned on when the pulse generator is turned off output, so the semiconductor switching tube of the pulse power supply is safe to work, and the protection circuit is only used for auxiliary purposes. This design has high reliability, and the switch tube can be selected from a common power semiconductor tube with a withstand voltage of 600V.

The inner hole of the primary coil 214 and the secondary coil 215 is provided with a magnetic core for electromagnetic coupling, and the magnetic circuit of the magnetic core is provided with a magnetic air gap 218; the optimal design of the magnetic core uses an iron-based ultrafine crystal The iron core may also be provided with a ferrite core. The inductance of ferrite is low, the coil winding needs to be increased, and the loss is of course large. the

The primary coil 214 is wound in the primary insulating bobbin 211, and the inner holes of the primary insulating bobbin 211 and the multi-slot insulating bobbin 212 are provided with an iron-based ultrafine crystal core for electromagnetic coupling. A magnetic air gap 218 is set in the magnetic circuit of the iron-based ultramicrocrystalline core, and the width of the magnetic air gap 218 is 0.15--0.4mm, which is adjusted according to the working frequency and output power. The high-voltage fast recovery diode 217 isolates each line of the secondary coil 215 for high-frequency isolation, and the distributed capacitance of the winding decreases exponentially, which is conducive to improving the rate of the rising and falling edges of the output pulse; it can also reduce the impact on the high-voltage fast recovery diode. 217's reverse withstand voltage requirements not only reduce the cost, but also increase the reliability of work, and obtain unexpected results. the

The withstand voltage parameter of the high voltage fast recovery diode 217 is at least 12KV, and the recovery time is less than 80nS. the

Embodiment 7:

The G pole of the switching tube Q1 described in the utility model is provided with a driving circuit IC, and the driving circuit IC is provided with an oscillator ZTC, an error amplifier WCF and a comparator PWM, and the driving circuit IC is made into a module; a switching power supply can also be selected The control integrated circuit UC3842 class replaces. the

Another technical solution is to select the switching power supply control integrated circuit IC1 including the switching tube to be made of a monolithic integrated circuit TOP225 or TOP224, or a monolithic five-terminal switching power supply IC1 with better performance including MC33374. the

The primary coil of the pulse step-up transformer 216 described in the utility model is provided with a transient diode D1 and a fast recovery diode D2, which are connected in parallel with the primary coil 214 after being reversely connected in series. C1 is connected in parallel with transient diode D1. The anode of the fast recovery diode D2 is connected to the drain of the switching tube Q1. The transient diode D1 absorbs the reverse peak voltage exceeding the threshold generated when Q1 is turned off, and acts as a clamp. In this embodiment, when the mains voltage is 220V, the transient diode D1 is preferably 1.5KE250A, with a working current of 4.2A and a limiting voltage of 237--263V. the

The working principle of the pulse power supply 2 of the utility model:

The mains is rectified by the bridge rectifier circuit and filtered by the filter capacitor to obtain the DC power supply DC. When the switching tube Q1 is turned on by the PWM pulse excitation, the DC power supply DC is applied to both ends of the primary coil of the pulse step-up transformer 216. At this time, the primary coil 214 is equivalent to a pure inductance, and the current flowing through the primary coil 214 increases linearly. The energy of the power supply is stored in the inductance of the primary coil 214 in the form of magnetic energy; the secondary high voltage fast recovery diode 217 of the pulse step-up transformer 216 is cut off due to the reverse direction. When the switch tube Q1 is turned off, the polarity of the voltage across the primary coil 214 is instantly reversed due to the fact that the inductor current cannot be mutated. The energy is released instantaneously, transmitted to the secondary coil 215 to boost the voltage, and generates a high-voltage narrow pulse current, which is provided to the external plasma reactor for corona discharge. the

The samples of the working current flowing through the plasma reactor are sent to the error amplifier WCF and the comparator PWM in the driving circuit IC for processing. When the plasma reactor is damaged, aged, or short-circuited, the abnormal state signal current is processed, the output pulse width of the comparator PWM is zero, and the switch tube Q1 is turned off to realize automatic protection. Similarly, when the working current of the plasma reactor changes due to the load, the output pulse width of the comparator PWM also changes to control the conduction time of the switching tube Q1 to realize automatic adjustment of the output power of the pulse power supply 2 to stabilize the plasma reactor. of corona discharge. the

Fig. 8 is a waveform diagram of the high voltage discharge current output by the pulse step-up transformer 216 of the present invention. This discharge current waveform is measured on the sampling resistor connected externally to the ground terminal of the plasma reactor at the output end of the pulse step-up transformer 216. The digital oscilloscope shows that: the pulse duty cycle is 16%, the pulse width is 3uS, and the pulse rise time is 70nS. The waveform of the high-voltage discharge current output by the pulse transformer of the invention has good consistency, and the corona discharge of the plasma reactor is stable. the

The utility model is specially designed for air disinfection and purification of central air conditioners. The invention can be used for air disinfection and purification of air conditioning in public places including hospitals, clean rooms, office buildings, shopping malls, hotels, theaters, airports, subways and underground buildings. the

The above description is only to further illustrate the utility model with reference to the embodiments of the accompanying drawings, but not to limit the utility model. Within the scope of the technical idea of the utility model about the positive electrode of the metal belt, the conductive rail for preventing micro-discharge, the pulse power supply, the plasma reactor's own ultraviolet light to excite _TiO2, etc., those skilled in the art can make various methods according to the above-mentioned disclosed content. Simple deformation or equivalent replacement all belong to the scope of the technical solution of the utility model.

Claims (8)

1. Air disinfection and purification central air conditioner, including plasma reactor (1), pulse power supply (2), main fan (3a), return air fan (3b), controller (4), fresh air outlet (5), cleaning Zone (6), air outlet (7), main air filter (8), main air conditioner (15), return air duct (16), ventilation duct (17); the plasma reactor (1) is located in the ventilation duct (17), the ventilation duct (17) is communicated with the clean area (6), the high-voltage output end of the pulse power supply (2) is electrically connected with the plasma reactor (1), and the output end of the controller (4) is respectively connected with the pulse The power supply (2), the main fan (3a) and the power input end of the return air fan (3b) are electrically connected, the main air filter (8) is set at the air inlet of the main fan (3a), and the bottom of the clean area (6) is provided with a return filter. The air duct (16) communicates with the air outlet (7), and the return air fan (3b) is arranged in the return air duct (16); It is characterized in that the positive electrode (101) and the negative electrode (102) are arranged in the described plasma reactor (1), and the positive electrode (101) is arranged on the same plane by equidistant Parallel arrangement is made into a component, a total of n groups, and n is an integer within 50; the negative electrode (102) is made of aluminum plate or stainless steel plate, and there are n+1 pieces in total; Aluminum rod or stainless steel bar is made to stop the micro-discharge conductive rail (103), and the two ends of described positive electrode (101) are respectively fixed on the corresponding positions on the micro-discharge conductive rail; stop the micro-discharge conductive rail ( An insulating connector (105) is respectively arranged at both ends of 103), and is fixed in the corresponding installation hole of the reactor shell (108); several anti-microdischarge conductive rails (103) are electrically connected with oxidation-resistant wires. 2. The air disinfection and purification central air conditioner according to claim 1, characterized in that said main air conditioner (15) is provided with a shower (13) and a dehumidifier (11), and the shower (13) lower end A water pump (27) is provided to communicate with the heat exchanger of the main air conditioner (15) with a water pipe, and the shower (13) is arranged in the ventilation duct; An exhaust control valve (20) is provided on the left side of the air outlet of the return air fan (3b), and the exhaust control valve (20) is connected to the air outlet (7), and a primary return air control valve (21) and primary The return air duct (18) is connected to the air inlet of the sprinkler (13) after being connected, and the right side pipeline is provided with a secondary return air control valve (22) connected to the secondary return air duct (14) and then connected to the sprayer ( 13) and the dehumidifier (11); The air inlet of the clean area (6) is provided with a muffler (23), and the air outlet of the clean area (6) is provided with a return air muffler (12); the fresh air outlet (5) is provided with a fresh air filter in turn (9), fresh air control valve (19), fresh air air conditioner (10) and plasma reactor (1), and communicate with shower (13) inlet end. 3. The air disinfection and purification central air conditioner according to claim 1, characterized in that the said anti-micro-discharge conductive rail (103) is provided with convex portions (109) arranged equidistantly, and the two sides of the positive electrode (101) The ends are the tops of the convex parts (109) respectively fixed on the corresponding conductive rails; the convex parts (109) of the micro-discharge conductive rails (103) are symmetrically arranged as a group, and each of the micro-discharge conductive rails (103) ) convex portion (109) is provided with n groups, and the top of the convex portion (109) is provided with an outward elbow; the two ends of the positive electrode (101) are provided with a stainless steel connection frame (110), and the middle of the stainless steel connection frame (110) is punched into a square hole, the elbow at the top of the convex part (109) is inserted into the square hole of the stainless steel connection frame (110); The negative electrode fixing pin (111) that is drawn out is grooved at the corresponding place of the reactor shell (108) for butt fastening. 4. The central air conditioner for air disinfection and purification according to claim 1, characterized in that the said anti-microdischarge conductive rail (103) is provided with recesses arranged equidistantly, the recesses are set in n groups, and the positive electrode (101) The two ends are respectively fixed in the recesses of the corresponding anti-micro-discharge conductive rails (103); the two ends of the anti-micro-discharge conductive rails (103) are then fixed with four positive electrode metal brackets (104) orthogonally arranged around the reactor , and for electrical connection; the outer edge of the positive electrode metal bracket (104) is provided with several cylindrical micro-discharge preventing conductive rail fixed rings (107), which prevent micro-discharge conductive rail fixed rings (107) from the phase Adjacent micro-discharge conductive rails (103); the upper and lower ends of each positive electrode metal support (104) are respectively provided with an insulating connector (105) and the corresponding mounting hole of the shell (108) is fixed. 5. The air disinfection and purification central air conditioner according to claim 1, characterized in that the surface of the negative electrode (102) is made of oxidized aluminum plate, and nano-scale Ti0 ₂ is laid on both sides of the negative electrode (102). 6. The air disinfection and purification central air conditioner according to claim 1, characterized in that a semiconductor switch tube Q1 and a pulse step-up transformer (216) are provided in the pulse power supply (2), and a semiconductor switch tube Q1 and a pulse booster transformer (216) are provided. The step-up transformer (216) is set by a single-ended flyback inverter circuit; the drain D of the semiconductor switching tube Q1 is connected with the primary coil (214) end a1 of the pulse step-up transformer (216), and the switch The source S of the tube Q1 is connected to the negative pole of the input DC power supply through the current-limiting resistor R1, and the opposite terminal b1 of the primary coil (214) is connected to the positive pole of the input DC power supply; Terminals a1, a2 and heteronym terminals b1, b2 are reversely set; The pulse step-up transformer (216) is provided with a multi-slot insulating bobbin (212), and the secondary coil (215) is divided into three to seven sections and wound on the corresponding recesses of the multi-slot insulating bobbin (212). The upper end of each wire package is provided with a high-voltage fast recovery diode (217), the anode of the high-voltage fast recovery diode (217) is connected to the end of the low-potential line package, and the high-voltage fast recovery diode (217) The negative pole is connected to the starting end of the high potential wire package. 7. The air disinfection and purification central air conditioner according to claim 5, characterized in that the G pole of the switching tube Q1 is provided with a drive circuit IC, and the drive circuit IC is provided with an oscillator ZTC, an error amplifier WCF and a comparator PWM, drive circuit IC is made into a module; switching power supply control integrated circuit UC3842 can also be used instead. 8. The air disinfection and purification central air conditioner according to claim 1 or 3, characterized in that the positive electrode (101) is made of an oxidation-resistant high-resistance electrothermal alloy, or iron-chromium-aluminum alloy Material; the width of the metal strip is 1-2mm, and the thickness is 0.05mm-0.20mm. the

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