CN113757891A - Liquid filtration type plasma air purifier and air purification method - Google Patents

Liquid filtration type plasma air purifier and air purification method Download PDF

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Publication number
CN113757891A
CN113757891A CN202111113505.5A CN202111113505A CN113757891A CN 113757891 A CN113757891 A CN 113757891A CN 202111113505 A CN202111113505 A CN 202111113505A CN 113757891 A CN113757891 A CN 113757891A
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China
Prior art keywords
air
gas
washing tank
stage
liquid
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CN202111113505.5A
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Chinese (zh)
Inventor
李国梁
田微
张智豪
吴思琪
杜禹
杨洋
肖玉
闫璐
黄名响
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Priority to CN202111113505.5A priority Critical patent/CN113757891A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/117—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering
    • F24F8/133—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using wet filtering by direct contact with liquid, e.g. with sprayed liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention discloses a liquid filtration type plasma air purifier and an air purification method, and relates to the field of air purification. The device consists of a plasma cavity, a gas mixing cavity, a primary gas washing groove, a secondary gas washing groove, an airflow generating unit, a condensation cavity and a control unit. The air flow enters a plasma cavity to be mixed with the plasma, pollutants in the air flow fully react with the plasma and ozone in a gas mixing cavity, the air flow is washed by a primary air washing tank to remove dust particles with large particle sizes, the air flow is washed by a secondary air washing tank to remove ozone, and the air flow is passed through a condensation cavity to remove redundant water vapor. The invention only needs to consume a small amount of harmless cheap soda powder and electric energy, can purify air pollutants in a comprehensive type, does not generate any harmful solid, liquid and gas emissions or waste, does not need to replace a solid filter element, and does not generate secondary dust. The applicable scene is extensive.

Description

Liquid filtration type plasma air purifier and air purification method
1. Field of the invention
The invention relates to the technical field of air purification.
2. Background of the invention
The air purifier is equipment for reducing Volatile Organic Compounds (VOCs) such as dust, pollen, PM2.5, formaldehyde and the like, bacteria, viruses, allergens and other air pollutants in indoor air, and can effectively improve the air cleanliness. The mainstream products in the current indoor air purifier market are mainly based on three working modes or combinations thereof: 1. a solid-state filter screen is adopted; 2. electrostatic dust collection is adopted; 3. releasing negative ions. Air purifiers based on these methods, and air purifiers that combine the use of these methods, still have their own disadvantages.
The method of adopting the solid filter screen is to filter and adsorb pollutants in the air by passing the air through a compact solid filter screen, such as a high efficiency air filtration (HEPA) filter screen, active carbon and other solid materials with compact pores. For example, the fully intelligent air purifier disclosed by bodhi rhyme technologies ltd, daqing, employs HEPA and activated carbon as a filter layer (chinese registered patent application No. 201420404845.2); ganzhou Anhong environmental protection science and technology Limited, air purifier using nanogel as a filtering layer was disclosed (Chinese registered patent application No. 201610360431.8). In order to add the functions of removing formaldehyde and the like to some products, a formaldehyde removing layer is added on the basis of a filter screen, for example, a formaldehyde decomposition catalyst layer is added on the filter screen of an air purifier disclosed by electric heating appliance manufacturing limited company of Sundzone, Foshan City (Chinese registered patent application No. 202022561682.7). The method has poor filtering effect on small-particle-size dust particles and gaseous pollutants in the air, and the filtering effect of the filter screen is reduced along with the increase of the using time, so that solid wastes are generated due to the need of regular replacement, the using cost is increased, and secondary dust raising is easy to occur when the filter screen is replaced.
The electrostatic dust collection method is to ionize gas by using an electrostatic field to enable dust particles to be charged to a certain electric property and then to be adsorbed to a collecting electrode with the opposite electric property. Such as an electrostatic dust collection module disclosed by Zhuhaili electric appliances, Inc. (Chinese registered patent application No. 202010952505.3); high-voltage electrostatic dust collector disclosed by Ningbo-cheng electronics industries, Inc. (Chinese registered patent application No. 202020937026. X); an air purifier disclosed by baon technologies ltd, suzhou (chinese registered patent application No.: 202020182172.6). The method can continuously generate ozone to be released into the environment in the working process, the collecting electrode needs to be cleaned regularly, and secondary dust is easy to be blown out in the cleaning process.
The method for releasing negative ions to the environment is adopted, negative ions are released to the ambient air, the negative ions are diffused in the air, and positively charged small-particle-size dust particles are neutralized by the negative ions and are condensed into larger particle sizes, so that the dust particles are easy to settle. Such as an air purifier (chinese registered patent application No. 202110555651.7) that releases negative ions into the air. However, this method generates ozone during operation, and the ozone is released into the environment, and dust particles settled by gravity are scattered everywhere in the room, which causes a cleaning burden, and secondary dust is easily generated.
Some air purifiers use the above principles in combination, but still have disadvantages inherent to the principles. For example, a plasma indoor air purification device (Chinese registered patent application No. 202010896418.0) disclosed by Xian aerospace purple plasma technology, Inc. which combines anion release with a filter screen; a photocatalytic air purifying purifier disclosed by Zhejiang Anji cloud environmental science and technology Limited company combines HEPA, active carbon, a photocatalyst layer and a negative ion generator (Chinese registered patent application number: 202110253258.2). However, these methods still suffer from the disadvantage of requiring regular replacement of the screen.
In addition to the above three methods, there is a method of water washing, which uses water to adsorb soluble dust particles and soluble gas in the air. Such as the air cleaner disclosed by environmental appliance manufacturing limited of the united states of the guangdong, which filters air using a water film (chinese registered patent application No. 202023266972.5), and the bubbling type water washing air cleaner disclosed by the university of the changzhou, which washes air using a large area flowing water film (chinese registered patent application No. 202110553816.7). However, these methods have less filtration types for pollutants in the air, such as poor adsorption effect for dust particles with small particle size, and cannot sterilize and disinfect. In addition, an anion air purification system combines water spray and anions (Chinese registered patent application No. 202110148017.1), can adsorb small dust particles, but increases the defect of ozone release, and has high water consumption. In addition, these adopt the mode of washing, add the indoor unnecessary air humidity of increase additionally.
In summary, almost every existing air purifier has its own disadvantages, such as incomplete purification function, high cost, generation of solid waste, secondary dust emission, generation of ozone, etc., due to the inherent properties of its purification principle.
3. Summary of the invention
(1) Solves the technical problem
In order to make up for the defects of the prior art, the invention provides a liquid filtration type plasma air purifier and an air purification method. The method has wide coverage for purifying the pollutants in the air, and the pollutants which can be purified comprise PM10, PM2.5, bacteria, viruses, formaldehyde and other VOCs. And the solid filter screen is not used, harmful or difficultly treated solid or liquid waste is not generated, the use cost is low, and any harmful gas such as ozone is not generated.
(2) Technical scheme
The embodiment of the invention provides a liquid filter type plasma air purifier which comprises 6 cavities and a control unit which are sequentially communicated, wherein each cavity is provided with an air inlet and an air outlet which are sequentially connected, air flow enters from the first cavity and is discharged from the last cavity, and the plasma cavity, the air mixing cavity, the primary air washing groove, the secondary air washing groove, the air flow generating unit and the condensation cavity are sequentially arranged according to the flowing sequence of the air flow.
And a plasma generator is arranged in the plasma cavity and can generate plasma. The plasma generator is one of 3 of negative corona discharge, positive corona discharge and dielectric barrier discharge. The gas inlet of the plasma chamber is provided with a one-way valve to prevent the gas in the chamber from flowing back to the external environment.
The baffle plates of the gas mixing cavity are arranged in the gas mixing cavity in a staggered manner so as to prolong the time of the gas flow passing through the gas mixing cavity and increase the mixing degree of each component of the gas flow, and the plasma, the ozone and the pollution components in the air can fully act. In order to increase the disturbance to the air flow, a plurality of small plate-shaped structures are arranged on the baffle plate of the air mixing cavity; or the baffle plate is in a curved arc shape; or the baffles are staggered and overlapped with each other to form a net structure.
The device comprises a control unit, a first-stage gas washing tank liquid level meter, a first-stage gas washing tank reflux pipe, a first-stage gas washing tank reflux cavity, a first-stage gas washing tank reflux valve, a first-stage gas washing tank liquid level meter, a first-stage gas washing tank reflux pipe and a first-stage gas washing tank reflux valve, wherein the first-stage gas washing tank is internally provided with a gas-liquid separation plate and a hole sieve plate to separate a cavity into a first-stage gas washing tank gas inlet cavity and a first-stage gas washing tank gas washing cavity, the first-stage gas washing tank gas washing cavity is internally provided with the first-stage gas washing tank liquid level meter, the first-stage gas washing tank liquid level meter transmits a liquid level signal to the control unit through a lead, and the first-stage gas washing tank reflux pipe is connected with the first-stage gas washing tank reflux valve. The surface of the mesh sieve plate is hydrophobic and has smaller aperture, so that the primary gas washing liquid can be isolated in the gas washing cavity of the primary gas washing tank; or the surface of the hole sieve plate is hydrophilic or the aperture is large, the first-level gas washing liquid can freely pass through the hole sieve plate, one end of the hole sieve plate is positioned at the bottommost part of the gas inlet cavity and the gas washing cavity, and the hole sieve plate is positioned at an inclined position. The shape of the hole sieve plate is a flat plate; optimally, the shape of the hole sieve plate is a repeatedly folded flat plate structure; preferably, the hole sieve plate and the gas-liquid partition plate are combined into a pipeline structure. The first-stage air washing tank air washing cavity is internally provided with air washing tank baffle plates which are flat plates which are inclined and are arranged in a staggered manner; optimally, the baffle plates of the gas washing tank are short bent plates and are arranged in a staggered mode.
The second-stage gas washing tank is internally provided with a gas-liquid partition plate and a hole sieve plate to divide the cavity into a second-stage gas washing tank gas inlet cavity and a second-stage gas washing tank gas washing cavity, the second-stage gas washing tank gas washing cavity is provided with a second-stage gas washing liquid, and the second-stage gas washing liquid is a solution capable of generating hydroxyl ions through electrolytic reaction, such as Na2CO3An aqueous solution. An electrolytic electrode is arranged in the secondary gas washing tank gas washing cavity, the electrolytic electrode is partially immersed in the secondary gas washing liquid, a secondary gas washing tank liquid level meter and a PH meter are arranged in the secondary gas washing tank gas washing cavity, and the liquid level signal and the PH value signal are transmitted to the control unit by the secondary gas washing tank liquid level meter and the PH meter through leads. The secondary air washing tank air washing cavity is provided with a secondary air washing tank return pipe, and the secondary air washing tank return pipe is connected with a secondary air washing tank return valve. And the gas outlet of the secondary gas washing tank is provided with an electric heating wire which is controlled by a power supply of the electric heating wire and can burn and remove hydrogen generated by the electrolytic reaction. The heating wire power supply and the electrolysis power supply are linked and can be simultaneously opened and closed. Optimally, the electrolytic electrodes are formed by sequentially arranging a plurality of positive electrodes and negative electrodes in a staggered and overlapped manner; preferably, the electrolysis electrodes are not arranged independently, but the gas washing tank baffle plate is made of an electrode material, and has the functions of the electrodes and the function of guiding bubbles to move.
And a fan impeller is arranged in the airflow generating unit, and an axial flow fan impeller or a centrifugal fan impeller is adopted. The airflow generating unit can be selected from a plurality of positions, including: the second-stage gas washing groove is positioned between the second-stage gas washing groove and the condensation cavity; alternatively, before the plasma chamber; or, between the plasma chamber and the gas mixing chamber; or, the air mixing cavity is positioned between the air mixing cavity and the primary air washing groove; or, between the first-stage gas washing tank and the second-stage gas washing tank; or, alternatively, after the condensation chamber. Preferably, there may be more than one air flow generating unit.
The condenser is characterized in that a condenser and a condensate tank are arranged in the condensation cavity, the condensate tank is connected with a condensate return pipe, and the condensate return pipe is connected with the return valve of the primary gas washing tank and the return valve of the secondary gas washing tank. The condenser consists of a condenser cold end and a condenser hot end. The hot end of the condenser is positioned outside the condensation cavity and can radiate heat to the external environment. The temperature difference of the condenser is generated by semiconductor refrigeration or compressor refrigerant circulation refrigeration. The condenser cold end is arranged above the condensate tank, so that the condensate water can drip into the condensate tank. The condensed water in the condensed water tank enters the condensed water return pipe through gravity or a small water pump, and then flows back to the first-stage (second-stage) gas washing tank through the first-stage (second-stage) gas washing tank return valve and the first-stage (second-stage) gas washing tank return pipe so as to supplement the liquid level reduction caused by water evaporation in the first-stage (second-stage) gas washing tank.
The control unit is an embedded system and has the functions of: accept the liquid level signal of one-level gas washing groove level gauge, accept the liquid level signal of second grade gas washing groove level gauge, receive the PH value signal of PH gauge judges through the control condition, exports fan power switching signal, output plasma generator power switching signal, output one-level gas washing groove backward flow valve switching signal, output second grade gas washing groove backward flow valve switching signal, output electrolysis power switching signal, output heating wire power switching signal, output condenser power switching signal.
The embodiment of the invention provides an air purification method, wherein the purification process of air in a liquid filter type plasma air purifier is as follows: air enters the plasma cavity, the air mixing cavity, the primary air washing groove, the secondary air washing groove and the condensation cavity in sequence to finish the purification process. The specific process is as follows: air enters the plasma chamber and mixes with the plasma and ozone generated in the plasma chamber; air, plasma and ozone enter the air mixing cavity to be fully mixed and react for a period of time, so that three processes of condensing small-particle-size dust particles into large-particle-size dust particles, inactivating pathogenic microorganisms and decomposing gaseous organic volatile matters such as formaldehyde and the like are completed; the gas flow enters the primary gas washing tank, the gas flow is changed into bubbles through the perforated sieve plate and enters the primary gas washing liquid, and the large-particle-size dust particles, the inactivated microorganisms and the decomposition products of the gaseous organic volatile matters are adsorbed by the primary gas washing liquid; the gas flow enters the secondary gas washing tank, the gas flow is changed into bubbles through a hole sieve plate in the secondary gas washing tank and enters secondary gas washing liquid, and the secondary gas washing liquid contains hydroxyl ions generated by electrolytic reaction so as to reduce ozone in the gas flow into oxygen; and the air flow enters the condensation cavity, is condensed and then is discharged to the external environment, the water vapor in the air flow is partially condensed into condensed water which is converged into the condensed water tank, and flows back to the primary air washing tank and the secondary air washing tank through the condensed water return pipe so as to keep the liquid level in a normal range.
The first-stage (second-stage) gas washing tank has two liquid replacing modes. The first mode is: the first-stage (second-stage) gas washing tank and the whole machine are fixedly connected, a liquid inlet and a liquid inlet valve are arranged at the higher position of the container wall of the first-stage (second-stage) gas washing tank, a waste liquid discharge pipe and a waste liquid valve are arranged at the lowest position of the container wall of the first-stage (second-stage) gas washing tank, and liquid passes through the liquid inlet and the liquid inlet valve to enter the cavity and is discharged through the waste liquid discharge pipe and the waste liquid valve. The second mode is: the first-stage (second-stage) gas washing tank and the whole machine are not fixedly connected and can be independently taken out of and put into the outer frame of the whole machine, and when the first-stage (second-stage) gas washing tank is put into the outer frame, the first-stage (second-stage) gas washing tank corresponds to the following structure: the outer frame is provided with an air inlet corresponding to the air inlet of the first-stage or second-stage air washing groove; the outer frame is provided with an air outlet corresponding to the air outlet of the first-stage or second-stage air washing tank; a condensed water return pipe orifice is formed on the outer frame and corresponds to a first-stage (second-stage) gas washing groove return pipe orifice of the first-stage (second-stage) gas washing groove; an electrolytic electrode contact is arranged on the outer frame, corresponds to the electrolytic electrode of the secondary gas washing tank and is in contact with the electrolytic electrode to be conducted; the outer frame is provided with a sensor signal contact, corresponds to the signal output contacts of the level meter and the PH meter of the first-stage or second-stage gas washing tank and is communicated with the signal output contacts in a contact manner, an elastic sealing ring is arranged at the joint of the circulating liquid or gas corresponding to each other, a gas washing tank handle is arranged on the first-stage or second-stage gas washing tank, and the liquid is manually replaced after the first-stage or second-stage gas washing tank is taken out.
Each unit of the liquid filter type plasma air purifier comprises: the plasma chamber, the gas mixing chamber, the primary gas washing tank, the secondary gas washing tank, the gas flow generating unit and the condensation chamber are horizontally arranged in space; optimally, the units are arranged vertically in space in order to reduce the occupied area.
For the plasma chamber and the gas mixing chamber, there are two alternative extension structures for simultaneously eliminating the positively charged dust particles and the negatively charged dust particles. The first structure is as follows: and the two plasma cavities and the two gas mixing cavities are connected in series to respectively carry out positive corona discharge and negative corona discharge. The flow sequence of the air flow is as follows: the plasma chamber (positive/negative ions), the gas mixing chamber, the plasma chamber (negative/positive ions), the gas mixing chamber. The second structure is as follows: the two plasma liquid filter type air purifiers are used in series, the plasma cavity of the first plasma liquid filter type air purifier provides positive (negative) ions, airflow enters the second plasma liquid filter type air purifier after passing through the first plasma liquid filter type air purifier, and the plasma cavity of the second plasma liquid filter type air purifier provides negative (positive) ions.
The embodiment of the invention provides an air purification method, which needs to meet the following conditions in the air purification process: the liquid level of the first-stage washing liquid, the liquid level of the second-stage washing liquid and the pH value of the second-stage washing liquid are all within normal ranges. The control method comprises the following steps: starting the plasma body fluid filter type air purifier, starting the airflow generation unit, then transmitting a liquid level signal and a PH value signal to the control unit by the primary air washing tank liquid level meter, the secondary air washing tank liquid level meter and the PH meter, and starting the plasma generator to start an air purification process if the primary air washing tank liquid level meter, the secondary air washing tank liquid level meter and the PH meter are in normal ranges; if any one of the liquid level value and the pH value is not in the normal range, the plasma generator is not started, and the liquid level control process and the electrolysis control process are started until the liquid level value and the pH value are in the normal range. The liquid level control process comprises the following steps: and if the liquid level value is lower than the lower limit liquid level, starting the power supply of the condenser, simultaneously opening the reflux valve of the first-stage (second-stage) gas washing tank, refluxing condensed water, closing the reflux valve of the corresponding first-stage (second-stage) gas washing tank when the liquid level reaches the upper limit liquid level, and closing the power supply of the condenser when the liquid levels of the first-stage gas washing tank and the second-stage gas washing tank reach the upper limit liquid level. The electrolysis control flow comprises the following steps: and if the PH value of the secondary washing liquid is lower than the lower limit value, the electrolysis power supply and the electric heating wire power supply are started, and when the PH value reaches the upper limit value, the electrolysis power supply and the electric heating wire power supply are closed.
The embodiment of the invention provides a liquid filter type plasma air purifier, which has two initial liquid level achieving modes. The first way of achieving the initial liquid level is as follows: and adding water into the first-stage or second-stage gas washing tank in advance to form an initial liquid level. The second way of achieving the initial liquid level is as follows: the first-stage (second-stage) gas washing tank is not added with water in advance, the second-stage gas washing tank is only added with solute solids of the second-stage gas washing liquid in advance, and according to the liquid level control flow, the first-stage (second-stage) gas washing liquid is formed by the condensate water generated by the condenser from the air and reaches a normal liquid level value.
(3) Advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
1. the purification type is comprehensive, and under the condition that other additional functions (formaldehyde catalyst, ozone catalyst, ultraviolet sterilization, high-temperature sterilization and the like) are not added, the main types of pollutants, such as PM10, PM2.5, bacteria and viruses, formaldehyde and the like, can be purified at one time by a simple process.
2. No harmful gas by-product is discharged, and the ozone pollution risk is avoided after long-term use.
3. No solid filter element is used, and no solid waste is generated. The only consumable is non-toxic and harmless soda powder, and the usage amount is very small, and the cost is low.
4. The waste water after the first-stage gas washing liquid is used is equivalent to muddy water, the waste water after the second-stage gas washing liquid is equivalent to muddy water containing soda, and the two are nontoxic and harmless and can be directly discharged into a sewer without generating dust.
5. Due to the existence of the backflow of the condensed water, the water consumption is low.
6. Spraying is not adopted, the phenomena of nozzle blockage and the like are not generated, and the water can still work normally when containing higher-concentration dust particles. Therefore, the effective working time is long by adding water once, especially the secondary scrubbing liquid.
7. The liquid inlet and the liquid outlet are connected with a public pipeline, and can be conveniently integrated into fixed occasions such as an air conditioning system, a fresh air system and the like.
8. The water vapor in the air can be directly used as the source of the first-stage (second-stage) washing liquid, and the water vapor can still be used in the occasions without clean water.
4. Description of the drawings
Fig. 1 is an illustration of an operational schematic of a liquid filtered plasma air purifier according to an embodiment of the invention.
Fig. 2 is a flowchart of a process of purifying air by a liquid filtering type plasma air purifier according to an embodiment of the present invention.
FIG. 3 is an illustration of a schematic structural diagram of a plasma chamber according to an embodiment of the invention.
Fig. 4 is an illustration of a schematic structural view of a gas mixing chamber according to an embodiment of the present invention.
Fig. 5 is an illustration of a schematic structural view of a gas mixing chamber according to an embodiment of the present invention.
FIG. 6 is an illustration of a schematic structural view of a purge bin according to an embodiment of the invention.
FIG. 7 is an illustration of a schematic of the structure of a gas wash tank and an illustration of a schematic of the state of liquid in such a structure, according to an embodiment of the invention.
FIG. 8 is an illustration of a schematic structural view of a purge bin according to an embodiment of the invention.
FIG. 9 is an illustration of a schematic of the structure of a scrubber baffle according to an embodiment of the invention.
FIG. 10 is an illustration of a schematic structural diagram of a secondary gas wash tank electrode structure according to an embodiment of the invention.
FIG. 11 is an illustration of a schematic structural diagram of a secondary gas wash tank electrode structure according to an embodiment of the invention.
FIG. 12 is an illustration of a schematic structural diagram of a secondary gas wash tank electrode structure according to an embodiment of the invention.
Fig. 13 is an illustration of a schematic structural diagram of a condensation chamber according to an embodiment of the invention.
Fig. 14 is a diagram illustrating a first configuration of a first purge tank drainage mode according to an embodiment of the present invention.
Fig. 15 is a diagram schematically illustrating a structure of a second purge tank drain mode according to an embodiment of the present invention.
Fig. 16 is an illustration of one spatial layout schematic of a liquid filtered plasma air purifier according to an embodiment of the invention.
Fig. 17 is an illustration of one spatial layout schematic of a liquid filtered plasma air purifier according to an embodiment of the invention.
Fig. 18 is an operation process control flowchart of the liquid filtering plasma air purifier according to the embodiment of the present invention.
FIG. 19 is a flow diagram of level control of a primary scrubber tank according to an embodiment of the invention.
FIG. 20 is a flow chart of the electrolytic control of the secondary scrubber according to an embodiment of the present invention.
Description of the reference numerals (reference numerals of fig. 1 to 17)
100: a plasma chamber;
101: a plasma generator;
102, and (b); a plasma generator power supply;
103: a plasma chamber check valve;
200: a gas mixing cavity;
201: a gas mixing cavity baffle plate;
300: a first-stage gas washing tank;
301: first-stage washing liquid;
302: a return valve of the first-stage gas washing tank;
303: a first-stage scrubber tank return pipe;
304: a first-stage gas washing tank liquid level meter;
305: a gas-liquid separator;
306: a perforated sieve plate;
307: a waste liquid calandria;
308: a waste liquid valve;
309: a liquid inlet;
310: a liquid inlet valve;
311: an elastic sealing ring;
312: a sink handle;
313: a sensor signal output line;
314: a sensor signal contact;
315: a gas washing tank baffle plate;
316: a first-stage air inlet cavity of the air washing tank;
317: a first-stage air washing tank air washing cavity;
400: a secondary air washing tank;
401: secondary washing liquid;
402: a second-stage gas washing tank reflux valve;
403: a secondary scrubber tank return pipe;
404: a liquid level meter of a secondary gas washing tank;
405: an electrolysis electrode;
406: a pH meter;
407: an electrolytic electrode contact;
408: an electrolysis power supply;
409: an electric heating wire;
410: a heating wire power supply;
411: the air inlet cavity of the secondary air washing tank;
412: a secondary air washing tank air washing cavity;
500: an airflow generation unit;
501: a fan impeller;
502: a fan power supply;
600: a condensation chamber;
601: a condenser;
602: a condensed water return pipe;
603: a condensate tank;
604: a cold end of the condenser;
605: the hot end of the condenser;
606: a condenser power supply;
700: a container wall;
701: an outer frame;
801: the direction of the air flow;
802: the direction of the reflux of the condensed water;
803: an air inlet;
804: an air outlet;
805: a total air inlet;
806: a main air outlet;
807: air;
808: condensing water;
900: a control unit.
5. Detailed description of the preferred embodiments
The following merely illustrates the principles of the invention. Therefore, although not explicitly described or shown in the present specification, those skilled in the art can implement the principle of the invention and invent various devices included in the concept and scope of the invention. Further, it is to be understood that all terms and embodiments of the appended claims are principally intended expressly to be only for understanding the concept of the invention, and are not to be construed as limiting the embodiments and aspects specifically enumerated herein.
The above objects, features and advantages will become more apparent from the following detailed description with reference to the accompanying drawings, and thus, it is possible for those skilled in the art to easily embody the technical idea of the invention.
The embodiments described in the present specification will be described with reference to a cross-sectional view and/or a perspective view, which are ideal illustration views of the present invention. In order to effectively explain the technical contents, the thickness of the wall, the diameter of the tube, the volume of the cavity, the shape of each component part, and the like shown in the drawings are exaggeratedly shown. The form of the illustration may be distorted by manufacturing techniques and/or tolerances. Therefore, the embodiments of the present invention also include changes in form that occur according to the manufacturing process, and are not limited to the specific forms illustrated.
In the description of the various embodiments, the components that perform the same functions are given the same names and the same reference numerals for convenience, even though the embodiments are different. For convenience, the components and operations described in the other embodiments are omitted.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
An embodiment of the present invention provides a liquid filter type plasma air purifier, as shown in fig. 1a, including: the plasma chamber 100, the gas mixing chamber 200, the primary air washing tank 300, the secondary air washing tank 400, the air flow generating unit 500, the condensation chamber 600 and the control unit 900. A plasma can be generated within the plasma chamber 100. The air mixing chamber 200 provides turbulence for the air flow, increases the turbulence degree of the air flow and prolongs the flowing time of the air flow. The first-stage gas washing tank 300 contains a first-stage gas washing liquid 301, such as water. The secondary gas washing tank 400 contains a secondary gas washing liquid 401, such as a sodium carbonate aqueous solution. The airflow generating unit 500 allows air to enter the main intake 805, and is purified and discharged from the main outlet. The condensation chamber 600 condenses the air flow, and the generated condensed water flows back to the primary air washing tank 300 and the secondary air washing tank 400 to replenish the water lost by the air flow in the air washing process. The control unit 900 is responsible for control. The flow process of the air in the air purification system is shown in fig. 1 b.
The embodiment of the invention provides an air purification method, as shown in fig. 2, the air purification specifically comprises 5 steps:
step 1: the dirty air enters the plasma chamber 100, and plasma and ozone are generated in the plasma chamber 100, the plasma containing a population of high energy charged particles having a complex composition.
Step 2: air and plasma enter the air mixing cavity 200 together, the air mixing cavity 200 increases the disturbance and turbulence degree of the air flow, and the air flow passing time is prolonged, so that the air and the plasma are fully mixed and three processes are completed: small-particle-size dust particles charged in the air are neutralized by plasma and condensed into large-particle-size dust particles, microorganisms such as bacteria and viruses in the air are killed by the high-energy charged particles of the plasma and ozone, and gaseous organic volatile matters such as formaldehyde in the air react with the ozone to generate carbon dioxide and water.
And step 3: the mixed gas from the gas mixing cavity 200 enters the primary gas washing tank 300, the gas flow is changed into bubbles through the perforated sieve plate 306 in the primary gas washing tank 300 and enters the primary gas washing liquid 301, and the decomposition products of large-particle-size dust particles, microorganisms and gaseous organic volatile matters in the gas flow (bubbles) are adsorbed by the primary gas washing liquid 301.
And 4, step 4: the air flow from the first-stage gas washing tank 300 enters the second-stage gas washing tank 400, the electrolysis electrode 405 of the second-stage gas washing tank 400 electrolyzes the second-stage gas washing liquid 401, so that hydroxide ions with certain concentration are contained in the second-stage gas washing liquid 401, the air flow becomes bubbles through the hole sieve plate 306 in the second-stage gas washing tank 400 and enters the second-stage gas washing liquid 401, and the hydroxide ions in the second-stage gas washing liquid 401 reduce ozone in the air flow (bubbles) into oxygen.
And 5: air coming out of the secondary gas washing tank 400 passes through the condensation cavity 600, the temperature of the cold end of a heat exchanger in the condensation cavity 600 is lower than that of air flow, water vapor in the air flow is condensed when passing through the cold end of the heat exchanger, condensed water is collected into a condensed water tank and flows back to the primary gas washing tank 300 and the secondary gas washing tank 400 through a condensation pipe so as to supplement water lost in the primary gas washing liquid 301 and the secondary gas washing liquid 401, the liquid level of the gas washing tank is kept in a certain range, and the supplement amount is controlled by the primary gas washing tank reflux valve 302 and the secondary gas washing tank reflux valve 402 respectively.
The respective units of the plasma liquid filter type air purifier according to the embodiment of the present invention will be described separately according to the flow sequence shown in fig. 1 b.
The embodiment of the invention provides a liquid filter type plasma air purifier, and one of the constituent units of the liquid filter type plasma air purifier is the plasma chamber 100. The container wall 700 forms a cavity structure, and the container wall 700 is provided with an air inlet and an air outlet, wherein the air inlet receives air coming from the external environment or receives air flow coming from the air outlet of the air flow generating unit 500, and the air outlet discharges the air in the plasma chamber 100 to the next unit. A plasma generator 101 is fixed in the plasma chamber 100, and plasma is discharged to the air by the plasma generator 101. The plasma generator 101 employs the principle of corona discharge or dielectric barrier discharge, and its opening and closing is controlled by a plasma generator power supply 102, and the plasma generator power supply 102 is connected to the control unit 900. The plasma discharged from the plasma generator 101, its action object and action effect are different according to the discharge principle, as shown in table 1.
TABLE 1 plasma Generator 101 types and their uses
Plasma generator 101 type Electrode release product Target of action Effect of action
Negative corona discharge Negative ion and ozone Dust (positively charged), suspended microorganisms, part of VOCs Polymerizing positively charged dust, inactivating microorganisms, and decomposing part of VOCs
Positive corona discharge Positive ion and ozone Dust (negatively charged), suspended microorganisms, part of VOCs Polymerization of negatively charged dust, inactivation of microorganisms, and decomposition of part of VOCs
Dielectric barrier discharge Positive ion, negative ion, ozone DustSuspended microorganisms, part of VOCs Dust polymerization, microorganism inactivation, and partial VOCs decomposition
Preferably, a plasma chamber check valve 103 is provided at the gas inlet in order to prevent a portion of the plasma and ozone from reversely overflowing from the gas inlet due to the complicated movement of the gas flow in the plasma chamber 100.
The embodiment of the invention provides a liquid filter type plasma air purifier, one of the constituent units of which is the air mixing cavity 200. The container wall 700 forms a cavity structure of the air mixing cavity 200, and the container wall 700 is provided with an air inlet and an air outlet, wherein the air inlet receives air flow from the air outlet of the upper unit, and the air outlet discharges air in the air mixing cavity 200 to the next unit. The air mixing cavity baffle plates 201 are arranged in the air mixing cavity 200 in a staggered manner, as shown in fig. 4a, the inner surface of the container wall 700 of the air mixing cavity 200 and the air mixing cavity baffle plates 201 jointly form a long and zigzag air flow channel between the air inlet and the air outlet of the air mixing cavity 200, so that the time of air flow passing through the air mixing cavity 200 is prolonged, the turbulence degree of the air flow is increased, and the effect is to provide enough time for the plasma, ozone and air flowing from the plasma cavity 100 of the previous stage to be fully mixed and act: small-particle-size dust particles in the air are electrically neutralized and aggregated into large-particle-size dust particles, and the hydrophilicity of the dust particles is increased after the dust particles are treated by high-energy ions; microorganisms suspended in the air are inactivated by high-energy ions and ozone; part of VOCs in the air such as formaldehyde can react with high-energy ions and ozone to be decomposed into CO2And water.
Optimally, in order to increase the turbulence degree of the air flow in the air mixing chamber 200, more plate-shaped structures are added on the baffle plates 201 of the air mixing chamber, as shown in fig. 4 b.
Preferably, in order to increase the circulation distance of the air flow in the air mixing chamber 200, the air mixing chamber baffle 201 is curved, as shown in fig. 5 a.
Optimally, in order to increase the turbulence degree of the air flow in the air mixing chamber 200, the air mixing chamber baffles 201 are arranged in a mesh shape which is staggered and overlapped with each other, as shown in fig. 5 b.
The embodiment of the invention provides a liquid filter type plasma air purifier, one of the constitutional units of which is the primary air washing tank 300. The container wall 700 forms a cavity structure of the primary air washing tank 300, the container wall 700 is provided with an air inlet and an air outlet, the air inlet receives airflow discharged by the superior unit, and the air outlet discharges air in the primary air washing tank 300 to the next unit. As shown in fig. 6a, a gas-liquid separator 305 and a perforated screen 306 are disposed in the first-stage gas washing tank 300, and the gas-liquid separator 305 and the perforated screen 306 divide the space inside the first-stage gas washing tank 300 into two parts: the space on the side of the air inlet communicated with the primary air washing tank 300 is a primary air washing tank air inlet cavity 316, and the space on the side of the air outlet communicated with the primary air washing tank 300 is a primary air washing tank air washing cavity 317. A primary air washing tank liquid level meter 304 is arranged in the primary air washing tank air washing cavity 317, the primary air washing tank liquid level meter 304 transmits a liquid level signal to the control unit 900 through a lead, and the position of the primary air washing tank liquid level meter can be arranged at a proper position of the primary air washing tank air washing cavity 317. A primary air washing tank return pipe 303 entering from the outside of the cavity is arranged in the primary air washing tank air washing cavity 317, a primary air washing tank return valve 302 is arranged on the primary air washing tank return pipe 303, and the primary air washing tank return valve 302 is connected with a control unit 900. External condensate may flow from the primary scrubber return pipe 303 into the primary scrubber chamber 317. The primary scrubber gas cavity 317 is filled with the primary scrubber liquid 301, the perforated screen plate 306 is a porous mesh structure, the surface of the perforated screen plate has hydrophobicity for the primary scrubber liquid 301, and due to surface tension, the primary scrubber liquid 301 cannot pass through the perforated screen plate 306 and enter the primary scrubber gas inlet cavity 316, as shown in fig. 6 b. After the airflow from the air mixing chamber 200 enters the first-stage air inlet chamber 316 of the first-stage air washing tank 300, the airflow passes through the meshes of the mesh sieve plate 306 to form bubbles in the first-stage air washing liquid 301, and the bubbles rise in the first-stage air washing liquid 301 due to buoyancy and reach the liquid level of the first-stage air washing liquid 301, so that the first-stage air washing is completed in the process: the large-particle-size dust particles in the bubbles from the air-mixing chamber 200 in the previous stage and the inactivated microorganisms are adsorbed by the first-stage scrubber liquid 301. The primary scrubber liquid 301 comprises water. Moisture in the primary scrubbing liquid 301 in the primary scrubbing groove scrubbing cavity 317 is brought out by the air flow along with the scrubbing process and is lost, so that the liquid level of the primary scrubbing liquid 301 is lowered, a liquid level signal is output to the control unit 900 through the primary scrubbing groove liquid level meter 304, the control unit 900 controls the opening and closing of the primary scrubbing groove reflux valve 302 according to the liquid level signal, and then the reflux of the condensed water is controlled, so that the liquid level of the primary scrubbing liquid 301 is controlled within a normal range.
Preferably, the primary scrubbing liquid 301 is an aqueous solution of a surfactant, such as sodium stearate, to increase adsorption of hydrophobic dust particles in the bubbles.
Preferably, the surface of the perforated screen 306 is hydrophilic to the primary scrubbing liquid 301, or the perforated screen 306
The meshes are large, and the primary gas washing liquid 301 can pass through the meshes of the mesh plate 306 and enter the primary gas washing groove inlet cavity 316. One end of the perforated screen deck 306 is located at the lowermost part of the primary scrubber tank inlet chamber 316 and the primary scrubber tank scrubber chamber 317, and the perforated screen deck 306 is in an inclined position, as shown in fig. 7 a. When no airflow flows, the primary scrubber liquid 301 exists in the primary scrubber tank air-washing cavity 317 and the primary scrubber tank air-inlet cavity 316 at the same time, and the liquid level is the same, when airflow flows, the air pressure difference between the air inlet and the air outlet of the primary scrubber tank 300 causes the liquid in the primary scrubber tank air-inlet cavity 316 to flow into the primary scrubber tank air-washing cavity 317 through the meshes of the perforated plate 306, and at this time, the airflow forms bubbles, as shown in fig. 7 b.
Optimally, to increase the area of the aperture screen 306 to facilitate the generation of more bubbles through the aperture screen 306 for improved scrubbing speed, the aperture screen 306 is a repeating folded configuration, as shown in fig. 8 a.
Optimally, in order to increase the area of the perforated sieve plate 306 and increase the scrubbing speed, the gas-liquid separator 305 and the perforated sieve plate 306 are arranged in a pipe structure, as shown in fig. 8 b.
Optimally, in order to increase the time for the bubbles to float up in the primary scrubber liquid 301 and to increase the efficiency of the primary scrubber liquid 301 in adsorbing the dust particles in the bubbles, a scrubber baffle 315 is disposed in the primary scrubber tank scrubber chamber 317, as shown in fig. 9 a. The gas wash tank baffles 315 are flat, inclined and staggered, and can allow gas bubbles to float up at a slow rate along their inclined surfaces.
Preferably, the baffle 315 is a short bent plate-shaped structure, and is disposed in the space of the first-stage scrubber chamber 317 in a staggered manner, so as to facilitate the more uniform distribution of bubbles in the liquid, as shown in fig. 9 b.
The embodiment of the invention provides a liquid filter type plasma air purifier, one of the constitutional units of which is the secondary air washing tank 400. The container wall 700 forms a cavity structure of the secondary air washing tank 400, the container wall 700 is provided with an air inlet and an air outlet of the secondary air washing tank 400, the air inlet receives air flow from the primary air washing tank 300 at a higher level, and the air outlet discharges air in the secondary air washing tank 400 to a next unit. The secondary scrubber 400 has the same structure as the primary scrubber 300 except that the secondary scrubber 400 has a PH meter 406 and an electrolysis electrode 405 in addition to the primary scrubber 300, as shown in fig. 10 a. The electrolysis electrode 405 is arranged in the secondary gas washing tank gas washing chamber 412 of the secondary gas washing tank 400, can be immersed below the liquid level and is connected with an electrolysis power supply 408 outside the cavity through a circuit, and the electrolysis power supply 408 is connected with the control unit 900. The electrolysis electrode 405 is capable of electrically conducting the liquid in the secondary scrubber chamber 412 for an electrolysis reaction. The PH meter 406 is disposed in the secondary scrubber chamber 412 below the liquid level and connected to the control unit 900 via a wire. The secondary gas washing liquid 401 is filled into the secondary gas washing tank gas washing cavity 412, and the secondary gas washing liquid 401 is a solution which is nontoxic and non-corrosive and can generate high-concentration hydroxide ions through electrolytic reaction, such as Na2CO3An aqueous solution, which upon electrolysis generates an aqueous NaOH solution. The air passes through the first-stage air washing tank 300 of the previous stage, and most dust particles in the air flow are removedThe first-stage scrubber liquid 301 adsorbs, but the gas stream still contains a significant amount of ozone. After entering the secondary scrubber tank 400, the ozone reacts with the high concentration of hydroxyl ions in the secondary scrubber liquid 401 and is removed. The concentration of hydroxyl ions in the secondary scrubbing liquid 401 is monitored by a pH meter 406 in real time, if the concentration is lower than a set value, the electrolysis electrode 405 is electrified, the solution is electrolyzed, the concentration of the hydroxyl ions is increased, and the pH value is increased; if the hydroxide ion concentration is within the set range, the electrolysis electrode 405 is not energized.
The liquid level of the secondary scrubber liquid 401 is controlled by the secondary scrubber tank return pipe 403, the secondary scrubber tank return valve 402, and the secondary scrubber tank level gauge 404, in the same manner as described above for the liquid level in the primary scrubber tank 300. All of the preferred embodiments described above for the primary scrubber 300 apply to the secondary scrubber 400 without regard to the electrolysis electrodes 405 and the PH meter 406.
Optimally, in order to increase the supply of more uniform hydroxide ions to the electrolysis electrode 405 during the electrolysis reaction, the electrolysis electrode 405 is formed by sequentially and alternately overlapping a plurality of positive electrodes and negative electrodes, as shown in fig. 10 b.
Preferably, the electrolysis electrodes 405 are not separately disposed, but the gas-washing tank baffle 315 is made of an electrode material, and has both an electrode function and a bubble movement guiding function, so as to increase the effective gas-washing space in the secondary gas-washing tank gas-washing chamber 412, as shown in fig. 11.
Preferably, in order to reduce or eliminate the discharge of hydrogen generated by the electrolytic electrode 405 during operation to the external environment, a heating wire 409 is disposed at the air outlet of the secondary gas washing tank 400, the heating wire 409 is powered by a heating wire power supply 410, and the heating wire power supply 410 is connected to a control unit 900, as shown in fig. 12. The heating wire power supply 410 and the electrolysis power supply 408 are linked and can be simultaneously opened and closed, when the electrolysis reaction is started, the heating wire 409 works to burn the hydrogen generated by the electrolysis reaction, and the hydrogen in the airflow discharged by the secondary gas washing tank 400 is eliminated. The heating wire 409 is made of iron-chromium-aluminum alloy or nickel-chromium electrothermal alloy.
The embodiment of the invention provides a liquid filter type plasma air purifier, one of the constituent units of which is the airflow generating unit 500. The air flow generating unit 500 provides an air pressure difference through the fan impeller 501, such that the outlet pressure of the air flow generating unit 500 is greater than the inlet pressure of the air flow generating unit 500, and finally, air can enter the general air inlet 805 of the air purifier and be discharged from the general air outlet 806, thereby completing the flow of air inside the air purifier. The method for providing the pressure difference adopts an axial flow fan impeller 501 or a centrifugal fan impeller 501, and the opening and closing of the fan impeller 501 are controlled by a fan power supply 502. The gas flow generating unit 500 is located between the secondary air washing tank 400 and the condensing chamber 600, as shown in fig. 1.
Optimally, the gas flow generating unit 500 is located before the plasma chamber 100; or between the plasma chamber 100 and the gas mixing chamber 200; or between the air mixing cavity 200 and the primary air washing tank 300; or between the primary scrubbing tank 300 and the secondary scrubbing tank 400; or after the condensation chamber 600.
Preferably, the number of the air flow generating units 500 is two or more in order to reduce the fan noise.
The embodiment of the invention provides a liquid filter type plasma air purifier, and one of the constituent units of the liquid filter type plasma air purifier is the condensation cavity 600. The container wall 700 is a cavity structure of the condensation chamber 600, the container wall 700 is provided with an air inlet and an air outlet, the air inlet is connected with the air flow from the secondary air washing tank 400 of the previous stage, and the air outlet discharges the air in the condensation chamber 600 to the external environment or the next unit. As shown in fig. 13, a condenser 601 is disposed on a container wall 700 of the condensation chamber 600, the condenser 601 is composed of a condenser cold end 604 and a condenser hot end 605, the temperature of the condenser cold end 604 is lower than the room temperature, the temperature of the condenser hot end 605 is higher than the room temperature, and the temperature difference between them is provided by a semiconductor refrigeration sheet. The condenser cold end 604 of the condenser 601 is arranged in the condensation chamber 600, when the air flow passes through the condenser cold end 604 with lower temperature, part of water vapor in the air flow is condensed and drops into a condensation water tank 603 arranged below the condenser cold end 604. The condensed water in the condensed water tank 603 may flow back to the primary gas-washing tank 300 and the secondary gas-washing tank 400 through the condensed water return pipe 602 to supplement the liquid level. The hot end 605 of the condenser is disposed outside the condenser 601 to dissipate heat to the surrounding environment. The operation of the condenser 601 is realized by controlling the condenser power supply 606 by the control unit 900.
Optimally, if the air purifier is large and has high air flow, the temperature difference source of the condenser 601 is a compressor and a refrigerant cycle.
The embodiment of the invention provides a liquid filter type plasma air purifier, and one of the constituent units of the liquid filter type plasma air purifier is the control unit 900. Control unit 900 contains embedded system, and to the liquid level signal of system input one-level gas washing groove level gauge 304, the liquid level signal of second grade gas washing groove level gauge 404, the PH value signal of PH meter 406, the system judges through the condition, outputs plasma generator power 102 switching signal the one-level gas washing groove backward flow valve 302 switching signal the second grade gas washing groove backward flow valve 402 switching signal electrolysis power 408 switching signal heating wire power 410 switching signal fan power 502 switching signal condenser power 606 switching signal realizes liquid filtration formula plasma air purifier's normal work.
After a period of time of gas washing, the liquids in the first-stage gas washing tank 300 and the second-stage gas washing tank 400 need to be replaced because the adsorbed dust particles and the decomposition products of VOCs in the air reach a certain amount and the gas washing can no longer be effective. The invention provides two ways to replace the liquid in the first-stage gas washing tank 300 and the second-stage gas washing tank 400 through embodiments, and the principle of replacing the liquid in the first-stage gas washing tank 300 is the same as that in the second-stage gas washing tank 400.
The first way the secondary scrubber tank 400 is to change the liquid is a fixed mode. In this way, the secondary scrubber tank 400 is fixedly connected with the purifier, and the secondary scrubber tank 400 has the functions of liquid feeding and liquid discharging. As shown in fig. 13, a liquid inlet 309 and a liquid inlet valve 310 are arranged at a higher position of the container wall 700 of the secondary gas washing tank 400 above the normal liquid level of the secondary gas washing liquid 401, and the secondary gas washing liquid 401 is added through the liquid inlet 309 and the liquid inlet valve 310. A waste liquid discharge pipe 307 is arranged at the lowest part of the container wall 700 of the secondary air washing tank 400, and a waste liquid valve 308 is arranged in the waste liquid discharge pipe 307. The secondary scrubbing liquid 401 can be discharged through the waste liquid drain pipe 307 and the waste liquid valve 308.
The second way the secondary scrubber tank 400 is changed to liquid is an active mode. In this manner, the secondary scrubber tank 400 and the purifier are not fixedly connected, and the secondary scrubber tank 400 can be taken out separately, as shown in fig. 15. The purifier is provided with an outer frame 701, and the secondary gas washing tank 400 can be put into the outer frame 701 or taken out from the outer frame 701. When the secondary air washing tank 400 is placed in the outer frame 701, the structure corresponds to the following: an air inlet is formed in the outer frame 701 and corresponds to the air inlet of the secondary air washing tank 400; an air outlet is formed in the outer frame 701 and corresponds to the air outlet of the secondary air washing tank 400; a condensed water return pipe 602 opening is formed on the outer frame 701 and corresponds to a pipe opening of a secondary air washing tank return pipe 403 of the secondary air washing tank 400; an electrolytic electrode contact 407 is arranged on the outer frame 701, corresponds to the electrolytic electrode 405 of the secondary gas washing tank 400 and is in contact with the electrolytic electrode to be conducted; the outer frame 701 is provided with a sensor signal contact 314 which corresponds to the signal output contacts of the liquid level meter 404 and the PH meter 406 of the secondary gas washing tank and is contacted with the signal output contacts for conduction, and the sensor signal contact 314 is connected with the control unit 900 by a sensor signal output line 313. The liquid or gas flowing ports corresponding to each other are provided with elastic sealing rings 311, and the elastic sealing rings 311 are fixed at the end of the outer frame 701 or the end of the secondary gas washing tank 400. The second-stage gas washing tank 400 is provided with a gas washing tank handle 312, so that the gas washing tank can be conveniently taken out and put in. After the secondary gas wash tank 400 is removed from the outer frame 701, the waste liquid may be dumped, and new secondary gas wash liquid 401 or solute solids of the secondary gas wash liquid 401 may be added.
An embodiment of the present invention provides a plasma liquid filter type air purifier, wherein each unit is horizontally arranged, as shown in fig. 1.
Optimally, in order to reduce the occupied area, the embodiment of the invention provides the plasma liquid filter type air purifier, and all units of the plasma liquid filter type air purifier are vertically arranged, as shown in fig. 16.
Optimally, in order to reduce the occupied area, the embodiment of the invention provides a plasma liquid filter type air purifier, and all units of the plasma liquid filter type air purifier are vertically arranged, as shown in fig. 17.
The embodiment of the invention provides a plasma liquid filter type air purifier, which is optimized to provide purification functions for dust particles with positive charges and dust particles with negative charges in air, wherein two plasma cavities 100 and two gas mixing cavities 200 are connected in series to respectively perform positive corona discharge and negative corona discharge. The air flow sequence is as follows: plasma chamber 100 (positive ions), gas mixture chamber 200, plasma chamber 100 (negative ions), gas mixture chamber 200. Or the following steps: plasma chamber 100 (negative ions), gas mixture chamber 200, plasma chamber 100 (positive ions), gas mixture chamber 200.
The embodiment of the invention provides a plasma liquid filter type air purifier, which is optimized to provide purification functions for dust particles with positive charges and dust particles with negative charges in air. The first plasma chamber 100 supplies positive (negative) ions, the gas stream is purged through the first chamber and enters the second chamber, and the second plasma chamber 100 supplies negative (positive) ions.
In the working process of the plasma liquid filter type air purifier provided by the embodiment of the invention, the liquid level of the primary scrubbing liquid 301, the liquid level of the secondary scrubbing liquid 401 and the pH value of the secondary scrubbing liquid 401 need to be within a normal range to purify air, and in order to achieve a control target, the invention provides a control flow, as shown in fig. 18. When the plasma liquid filter type air purifier is started, the air current generation unit 500 is started. The control unit 900 then receives the liquid level signals and the PH signals transmitted by the primary scrubber tank level gauge 304, the secondary scrubber tank level gauge 404 and the PH gauge 406, and checks whether the liquid level of the primary scrubber tank 300, the liquid level of the secondary scrubber tank 400 and the PH are within normal ranges. If the temperature is within the normal range, the plasma generator 101 is started to release the plasma, and the air purification process is started. If any one of the liquid level value and the pH value is not in the normal range, the plasma generator 101 is not started, and the corresponding liquid level control flow and the corresponding pH control flow are started until the liquid level value and the pH value are both in the normal range, the plasma generator 101 is started to release plasma, and the air purification process is started.
The liquid level control flow of the first-stage gas washing tank 300 is the same as that of the second-stage gas washing tank 400, and the liquid level control flow of the first-stage gas washing tank 300 is taken as an example for explanation. As shown in fig. 19, after the air purifier is started, if the liquid level is lower than the lower limit liquid level, the condenser power supply 606 is started, the condenser 601 starts to refrigerate, and the primary scrubber tank return valve 302 is opened. When the air flow passes through the cold end 604 of the condenser, part of the water vapor in the air flow is condensed into condensed water, and the condensed water sequentially passes through the condensed water return pipe 602, the first-stage air washing tank return valve 302 and the first-stage air washing tank return pipe 303 flow into the first-stage air washing tank 300, the liquid level in the first-stage air washing tank air washing cavity 317 gradually rises, and when the liquid level reaches the upper limit liquid level, the first-stage air washing tank return valve 302 is closed. If the liquid in the first-stage gas washing tank 300 and the liquid in the second-stage gas washing tank 400 reach the upper limit liquid level, the condenser power supply 606 is turned off, and the condenser 601 stops refrigerating.
The flow of the electrolysis control of the secondary gas-washing tank 400 is shown in FIG. 20. After the air purifier is started, if the PH value of the secondary scrubbing liquid 401 in the secondary scrubbing tank 400 is lower than the lower limit value of the PH normal range, the electrolysis power supply 408 and the heating wire power supply 410 are started, the electrolysis electrode 405 energizes the secondary scrubbing liquid 401, the secondary scrubbing liquid 401 undergoes an electrolysis reaction to generate hydroxyl ions to increase the PH value of the solution, and simultaneously, oxygen and hydrogen are generated, and the hydrogen is ignited by the heating wire 409 to be eliminated. And when the pH value reaches the upper limit of the normal pH range, the electrolysis power supply 408 and the heating wire power supply 410 are turned off, and the electrolysis reaction is stopped.
The embodiment of the invention provides a plasma liquid filtering type air purifier, which adopts an optimized use mode that: without the prior addition of liquid. The first-stage gas washing tank 300 and the second-stage gas washing tankNo liquid is added in the secondary gas washing tank 400 in advance, and only solute solid such as Na of the secondary gas washing liquid 401 is added in the secondary gas washing tank 400 in advance2CO3Powder, NaHCO3Powder, K2CO3And (3) powder. After the plasma liquid filter type air purifier is started, according to a liquid level control flow, the condenser 601 is relied on to flow condensed water generated from air into the primary gas washing groove 300 and the secondary gas washing groove 400 to form the primary gas washing liquid 301 and the secondary gas washing liquid 401.
The embodiment of the invention provides a plasma liquid filter type air purifier, wherein the materials of all parts of the plasma liquid filter type air purifier comprise but are not limited to the following materials according to the functional requirements and the structural requirements: polymer materials such as ABS plastic, Polycarbonate (PC), polyethylene terephthalate (PET), Polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), Polydimethylsiloxane (PDMS), rubber, silica gel, and the like, inorganic materials such as quartz, glass fiber, ceramics, and the like, conductive non-metal materials such as graphite, conductive metals such as aluminum, copper, stainless steel, chromium, platinum, and the like, metal alloys, gold plating, and combinations of various materials. For example, the container wall 700 of the air mixing chamber 200, the baffle plate 201 of the air mixing chamber, the container wall 700 of the first-stage (second-stage) air washing tank, the gas-liquid partition plate 305, the hole sieve plate 306 and the baffle plate 315 of the air washing tank adopt ABS plastic, PMMA or aluminum alloy inside to provide enough structural strength, and the surface is coated with PTFE to reduce the surface energy and the attachment of particles. For example, the electrolytic electrode 405 is made of conductive materials such as graphite, stainless steel, chrome-plated copper, and the like.
The shapes and structures of all the components include, but are not limited to, those shown in the embodiments of the present invention as long as the functions satisfy the functions defined in the above claims. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (15)

1. A liquid filtration plasma air purifier, comprising: the plasma chamber, the gas mixing chamber, the primary gas washing groove, the secondary gas washing groove, the gas flow generating unit and the condensation chamber are sequentially arranged according to the flowing sequence of the gas flow.
2. The plasma chamber of claim 1, wherein: a plasma generator is arranged in the cavity, and the principle of releasing plasma by the plasma generator is one of 3 types of negative corona discharge, positive corona discharge and dielectric barrier discharge; the opening and closing of the plasma generator are controlled by a plasma generator power supply; the gas inlet of the plasma chamber is provided with a one-way valve to prevent gas in the chamber from flowing back to the external environment.
3. The gas-mixing chamber according to claim 1, characterized in that: the baffle plates of the gas mixing cavity are arranged in the cavity in a staggered manner to increase the mixing degree of each component of the gas flow, increase the turbulence degree of the gas flow and prolong the flowing time of the gas flow, so that the plasma, the ozone and the pollution components in the air can fully act; a plurality of platelet-shaped structures are arranged on the baffle plate of the gas mixing cavity; or the gas mixing cavity baffle plate is in a curved arc shape; or the baffles of the air mixing cavity are overlapped in a staggered manner to form a net structure.
4. The primary gas wash tank of claim 1, wherein: a gas-liquid partition plate and a perforated sieve plate are arranged in the primary gas washing tank to divide the cavity into a primary gas washing tank gas inlet cavity and a primary gas washing tank gas washing cavity; a primary gas washing liquid is arranged in the gas washing cavity of the primary gas washing tank, and the primary gas washing liquid is water or a surfactant aqueous solution; a primary air washing tank liquid level meter is arranged in the primary air washing tank air washing cavity and transmits a liquid level signal to the control unit through a lead; the primary air washing tank air washing cavity is provided with a primary air washing tank return pipe, and the primary air washing tank return pipe is connected with a primary air washing tank return valve; the surface of the hole sieve plate is hydrophobic and has smaller aperture, so that the primary gas washing liquid can be isolated in the gas washing cavity of the primary gas washing tank; or the surface of the inner hole sieve plate is hydrophilic or has larger aperture, the primary washing gas liquid can freely pass through the hole sieve plate, one end of the hole sieve plate is positioned at the bottommost part of the gas inlet cavity and the washing gas cavity, and the hole sieve plate is in an inclined position; the shape of the hole sieve plate is a flat plate; or the shape of the hole sieve plate is a repeatedly folded flat plate structure; or the hole sieve plate and the gas-liquid partition plate are combined into a pipeline structure; the first-stage air washing tank air washing cavity is internally provided with air washing tank baffle plates which are flat plates which are inclined and are arranged in a staggered manner; or the gas washing tank baffle plates are short bent plates and are arranged in a staggered mode.
5. The secondary gas wash tank of claim 1, wherein: the second-stage gas washing tank is internally provided with a gas-liquid partition plate and a hole sieve plate to divide the cavity into a second-stage gas washing tank gas inlet cavity and a second-stage gas washing tank gas washing cavity, the second-stage gas washing tank gas washing cavity is provided with a second-stage gas washing liquid, and the second-stage gas washing liquid is a solution capable of generating hydroxyl ions through electrolytic reaction, such as Na2CO3Aqueous solution, NaHCO3Aqueous solution, K2CO3An aqueous solution; an electrolytic electrode is arranged in the secondary air washing tank air washing cavity, and the electrolytic electrode is partially immersed in the secondary air washing liquid; the electrification and the outage of the electrolysis electrode are controlled by an electrolysis power supply; a secondary air washing tank liquid level meter and a PH meter are arranged in the secondary air washing tank air washing cavity, and the secondary air washing tank liquid level meter and the PH meter transmit a liquid level signal and a PH value signal to the control unit through leads; the secondary gas washing tank gas washing cavity is provided with a secondary gas washing tank return pipe, and the secondary gas washing tank return pipe is connected with a secondary gas washing tank return valve; the gas outlet of the secondary gas washing tank is provided with an electric heating wire, and the opening and closing of the electric heating wire are controlled by an electric heating wire power supply; the electrolysis electrode is formed by sequentially and alternately arranging a plurality of positive electrodes and negative electrodes in an overlapping manner; or the electrolysis electrode is not arranged independently, but the baffle plate of the gas washing tank is made of electrode material and serves as the electrode materialThe electrolysis electrode has the functions of simultaneously acting as an electrode and guiding the movement of bubbles; the electrolysis power supply and the electric heating wire power supply are linked and can be simultaneously opened and closed.
6. A condensation chamber according to claim 1, wherein: a condenser is arranged on the container wall and consists of a condenser cold end and a condenser hot end; the hot end of the condenser is positioned outside the condensation cavity and can radiate heat to the environment; the cold end of the condenser is arranged in the condensation cavity, and a condensate water tank is arranged below the cold end of the condenser, so that condensate water can drip into the condensate water tank; the condensate water tank is connected with a condensate water return pipe, and the condensate water return pipe is connected with the return valve of the primary gas washing tank and the return valve of the secondary gas washing tank; the condensed water in the condensed water tank can flow into the first-stage or second-stage gas washing tank through the condensed water return pipe, the first-stage or second-stage gas washing tank return valve and the first-stage or second-stage gas washing tank return pipe by gravity or a small water pump; the method for generating the temperature difference between the cold end of the condenser and the hot end of the condenser by the condenser is semiconductor refrigeration; or, the refrigerant is circulated and refrigerated by the compressor.
7. The airflow generating unit according to claim 1, characterized in that: a fan impeller is arranged in a cavity of the airflow generating unit, and the fan impeller adopts an axial flow fan impeller or a centrifugal fan impeller; the operation of the fan impeller is controlled by a fan power supply; the position of the air flow generating unit in the whole liquid filter type plasma air purifier has a plurality of optional positions: the second-stage gas washing groove is positioned between the second-stage gas washing groove and the condensation cavity; alternatively, before the plasma chamber; or, between the plasma chamber and the gas mixing chamber; or, the air mixing cavity is positioned between the air mixing cavity and the primary air washing groove; or, between the first-stage gas washing tank and the second-stage gas washing tank; or, after the condensation chamber; in one of the liquid-filtered plasma air purifiers, the number of the gas flow generating units may be more than one.
8. The control unit of claim 1, wherein: for embedded system, receive the liquid level signal of one-level gas washing groove level gauge, receive the liquid level signal of second grade gas washing groove level gauge, receive the PH value signal of PH meter judges through the control condition, exports fan power switching signal, output plasma generator power switching signal, output one-level gas washing groove backward flow valve switching signal, output second grade gas washing groove backward flow valve switching signal, output electrolysis power switching signal, output heating wire power switching signal, output condenser power switching signal.
9. An air purification method is characterized in that: air sequentially enters the plasma cavity, the air mixing cavity, the primary air washing groove, the secondary air washing groove and the condensation cavity to complete a purification process; air enters the plasma chamber and mixes with the plasma and ozone generated in the plasma chamber; air, plasma and ozone enter the air mixing cavity to be fully mixed and react for a period of time, so that three processes of condensing small-particle-size dust particles into large-particle-size dust particles, inactivating pathogenic microorganisms and decomposing gaseous organic volatile matters such as formaldehyde and the like are completed; the gas flow enters the primary gas washing tank, the gas flow is changed into bubbles through the perforated sieve plate and enters the primary gas washing liquid, and the large-particle-size dust particles, the inactivated microorganisms and the decomposition products of the gaseous organic volatile matters are adsorbed by the primary gas washing liquid; the gas flow enters the secondary gas washing tank, the gas flow is changed into bubbles through a hole sieve plate in the secondary gas washing tank and enters secondary gas washing liquid, and the secondary gas washing liquid contains hydroxyl ions generated by electrolytic reaction so as to reduce ozone in the gas flow into oxygen; and the air flow enters the condensation cavity, is condensed and then is discharged to the external environment, the water vapor in the air flow is partially condensed into condensed water which is converged into the condensed water tank, and flows back to the primary air washing tank and the secondary air washing tank through the condensed water return pipe so as to keep the liquid level in a normal range.
10. The primary and secondary scrubber baths of claim 1 wherein: there are two ways to replace the liquid; the first mode is as follows: the first-stage (second-stage) gas washing tank is fixedly connected with the whole machine, a liquid inlet and a liquid inlet valve are arranged at the higher part of the container wall of the first-stage (second-stage) gas washing tank, a waste liquid discharge pipe and a waste liquid valve are arranged at the lowest part of the container wall of the first-stage (second-stage) gas washing tank, liquid is added through the liquid inlet and the liquid inlet valve, and is discharged through the waste liquid discharge pipe and the waste liquid valve; the second way is: the first-stage (second-stage) gas washing tank and the whole machine are not fixedly connected and can be independently taken out of and put into the outer frame of the whole machine, and when the first-stage (second-stage) gas washing tank is put into the outer frame, the first-stage (second-stage) gas washing tank corresponds to the following structure: the outer frame is provided with an air inlet corresponding to the air inlet of the first-stage or second-stage air washing groove; the outer frame is provided with an air outlet corresponding to the air outlet of the first-stage or second-stage air washing tank; a condensed water return pipe orifice is formed on the outer frame and corresponds to a first-stage (second-stage) gas washing groove return pipe orifice of the first-stage (second-stage) gas washing groove; an electrolytic electrode contact is arranged on the outer frame, corresponds to the electrolytic electrode of the secondary gas washing tank and is in contact with the electrolytic electrode to be conducted; the outer frame is provided with a sensor signal contact, corresponds to the signal output contacts of the level meter and the PH meter of the first-stage or second-stage gas washing tank and is communicated with the signal output contacts in a contact manner, an elastic sealing ring is arranged at the joint of the circulating liquid or gas corresponding to each other, a gas washing tank handle is arranged on the first-stage or second-stage gas washing tank, and the liquid is manually replaced after the first-stage or second-stage gas washing tank is taken out.
11. A liquid filtered plasma air cleaner as defined in claim 1, wherein: the plasma chamber, the gas mixing chamber, the primary gas washing tank, the secondary gas washing tank, the gas flow generating unit and the condensing chamber are horizontally arranged in space; or the plasma chamber, the gas mixing chamber, the primary gas washing groove, the secondary gas washing groove, the gas flow generating unit and the condensation chamber are vertically arranged in space.
12. The plasma chamber and gas mixing chamber of claim 1, wherein: in order to eliminate positive charge dust particles and negative charge dust particles simultaneously, two optional extension structures are provided; the first structure is as follows: connecting two plasma cavities and two gas-mixed cavities in series to respectively carry out positive corona discharge and negative corona discharge; the flow sequence of the air flow is as follows: the plasma chamber (positive/negative ions), the gas mixture chamber, the plasma chamber (negative/positive ions), the gas mixture chamber; the second structure is as follows: the two plasma liquid filter type air purifiers are used in series, the plasma cavity of the first plasma liquid filter type air purifier provides positive (negative) ions, airflow enters the second plasma liquid filter type air purifier after passing through the first plasma liquid filter type air purifier, and the plasma cavity of the second plasma liquid filter type air purifier provides negative (positive) ions.
13. An air cleaning method according to claim 2, characterized in that: in the air purification process, controlling the liquid level of the primary washing liquid, the liquid level of the secondary washing liquid and the pH value of the secondary washing liquid within a normal range; the control method comprises the following steps: starting the plasma body fluid filter type air purifier, starting the airflow generation unit, then transmitting a liquid level signal and a PH value signal to the control unit by the primary air washing tank liquid level meter, the secondary air washing tank liquid level meter and the PH meter, and starting the plasma generator to start an air purification process if the primary air washing tank liquid level meter, the secondary air washing tank liquid level meter and the PH meter are in normal ranges; if any one of the liquid level value and the PH value is not in the normal range, the plasma generator is not started, and a liquid level control flow and an electrolysis control flow are started until the liquid level value and the PH value are in the normal range; the liquid level control process comprises the following steps: if the liquid level value is lower than the lower limit liquid level, the power supply of the condenser is started, meanwhile, the return valve of the first-stage (second-stage) gas washing tank is opened, condensed water flows back, when the liquid level reaches the upper limit liquid level, the corresponding return valve of the first-stage (second-stage) gas washing tank is closed, and when the liquid levels of the first-stage gas washing tank and the second-stage gas washing tank reach the upper limit liquid level, the power supply of the condenser is closed; the electrolysis control flow comprises the following steps: and if the PH value of the secondary washing liquid is lower than the lower limit value, the electrolysis power supply and the electric heating wire power supply are started, and when the PH value reaches the upper limit value, the electrolysis power supply and the electric heating wire power supply are closed.
14. The fluid level control process of claim 13, wherein: there are two initial liquid level conditions; first initial level conditions: adding water into the first-stage or second-stage gas washing tank in advance to form an initial liquid level; second initial level conditions: the first-stage (second-stage) gas washing tank is not added with water in advance, the second-stage gas washing tank is only added with solute solids of the second-stage gas washing liquid in advance, and according to the liquid level control flow, the first-stage (second-stage) gas washing liquid is formed by the condensate water generated by the condenser from the air and reaches a normal liquid level value.
15. A liquid filtered plasma air cleaner as defined in claim 1, wherein: the materials of all the parts include, but are not limited to: polymer materials such as ABS plastic, Polycarbonate (PC), polyethylene terephthalate (PET), Polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), Polydimethylsiloxane (PDMS), rubber, silica gel and the like, inorganic materials such as quartz, glass fiber, ceramics and the like, conductive non-metal materials such as graphite and the like, metals such as aluminum, copper, stainless steel and the like, metal alloys and combinations of various materials; the shapes and structures of all the components include, but are not limited to, those shown in the embodiments of the present invention as long as the functions satisfy the functions defined in the above claims.
CN202111113505.5A 2021-09-23 2021-09-23 Liquid filtration type plasma air purifier and air purification method Pending CN113757891A (en)

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