WO2021012064A1

WO2021012064A1 - Air purifier

Info

Publication number: WO2021012064A1
Application number: PCT/CN2019/000160
Authority: WO
Inventors: 阳庆莉
Original assignee: 阳庆莉
Priority date: 2019-07-23
Filing date: 2019-08-20
Publication date: 2021-01-28
Also published as: CN110404680A

Abstract

Disclosed is an air purifier. The side, located on an air inlet fence (6), of an insulation support frame (5) arranged in a cabinet of the air purifier is mounted with at least one hafnium metal wire (1) made of high-purity hafnium metal, and the side, located on an air outlet fence (7), of the insulation support frame (5) is mounted with a dust collection module (2) of an electric-conducting metal material; and the hafnium metal wire (1) and the dust collection module (2) are electrically connected to a high-voltage power supply (3) by means of a mainboard control module (4). The high-purity elongated hafnium metal wire (1) is adopted as a discharge electrode in a high-voltage electric field and cooperates with the metal dust collection module (2) to generate ionic wind with a sufficiently large air volume without adding a fan and the like to drive air to flow, and therefore, noise is almost totally avoided, harmful particles in the air can be efficiently and rapidly adsorbed, and bacteria are killed; in addition, no ozone or only trace ozone is generated during the working process, and the health of a user is not damaged.

Description

An air purifier

Technical field

The invention relates to the technical field of air purification, in particular to an ion wind air purifier with high purification efficiency without fan noise, zero ozone or micro ozone.

Background technique

Due to the rapid development of industry and the increasing use of automobiles, industrial waste gas and automobile exhaust are continuously polluting the natural air. People's breathing environment deteriorates sharply. Particles and bacteria are serious threats to people's health. With the continuous improvement of people's quality of life, air purifiers have gradually entered people's daily lives.

At present, there are three main types of air purifiers on the market: physical filter purifiers, electrostatic precipitator purifiers, and ion wind air purifiers. These three types of purifiers have their own shortcomings:

1. The filter element of the physical filter purifier needs to be replaced regularly, resulting in a waste of filter element material, and the wind resistance is very large after the filter element is installed, resulting in very loud fan noise and small air volume; at the same time, the filter element is easy to accumulate stolen goods and promote bacteria after being used soon The spread of viruses produces secondary pollution, which is almost ineffective in removing bacteria and most viruses.

2. The electrostatic precipitator adopts a high-voltage electrostatic field method to adsorb particulate matter, and effectively kills bacteria through electrostatic discharge, reducing secondary pollution; but because the discharge needle or tungsten wire releases small electron energy, it must be between the dust collector The distance between the two electrodes is close, the area of the electric field is small, and it is difficult to improve the air purification performance. It is necessary to install a fan to increase the air flow. When the collected dust is too much, it is easy to cause the two electrodes to ignite, thereby increasing the ozone At the same time, since the internal voltage of the electrostatic air purifier is only a few thousand volts, the effect of killing bacteria is not obvious.

3. Ordinary ion wind air purifiers are mostly composed of high-voltage generators, tungsten wires and dust collecting plates. Such purifiers generate a voltage of more than 10,000 volts by the circuit, which can effectively kill bacteria, but the amount of ion air generated is small to remove dust. Other pollutants have low efficiency, and some add fans outside the dust collecting plate to increase the air volume but increase the noise. Because the emitter basically uses tungsten wire, the melting point of tungsten wire is high, the conductivity deviation is low, and the electric field strength formed is low. Therefore, it is necessary to forcibly increase the voltage to increase the electric field strength. The characteristics of the tungsten wire material as the emitter inevitably produce ozone and the amount of ozone is relatively high. Although ozone can sterilize and deodorize, when it exceeds a certain concentration, it will cause unsmooth breathing and weaken human lung function. Especially in a closed environment, it is easy to cause excessive indoor ozone and harm human health; indoor air ozone concentration should be Below 0.05ppm/h, many existing air purifiers manufactured by manufacturers claim that the ozone concentration meets health and safety standards. However, due to the inherent defects in the discharge electrode material and design, the ozone concentration produced often exceeds the safety standard, posing a threat to human health .

The solution of the present invention is an innovation based on the problems existing in the above-mentioned product technology.

Summary of the invention

In view of the above problems, the present invention aims to provide a new high-efficiency ion wind air purifier with no fan noise and no ozone or micro-ozone generation.

In order to achieve the above objective, the present invention provides the following technical solutions: an air purifier comprising a case body and an air inlet fence, an air outlet fence, a high voltage power supply and a main board control module installed on the case body, and the case body is also provided with insulation A support frame, the insulating support frame is located on one side of the air inlet fence with at least one hafnium wire made of high purity hafnium, and the insulating support frame is located on one side of the air outlet fence and is equipped with a dust collection module made of conductive metal; The hafnium wire and the dust collection module are electrically connected with the high-voltage power supply through the main board control module.

Further, the diameter of the hafnium metal wire is 0.05-0.5 mm, and the hafnium purity of the hafnium metal wire is higher than 99%.

Further, the shortest distance between the hafnium wire and the dust collection module is 30-100 mm.

Preferably, the hafnium metal wires are plural, which are installed on the insulating support in parallel to each other.

Further, the dust collection module is elongated, and its installation direction is parallel to the stretching direction of the hafnium wire.

Further, the dust collection module is composed of a plurality of metal long plates with smooth surfaces that are arranged parallel to each other and are mounted on an insulating module seat, and there is a gap for air circulation between adjacent metal long plates; the insulating module seat and The insulating support frame is a pluggable connection structure.

Further, the length of the hafnium metal wire is substantially the same as the length of the metal long plate.

As one of the embodiments, the hafnium wire is electrically connected to the positive pole of the high-voltage power supply through the main board control module, and the dust collection module is electrically connected to the negative pole of the high-voltage power supply through the main board control module and is grounded.

As one of the embodiments, the hafnium wire is electrically connected to the negative pole of the high-voltage power supply through the main board control module, and the dust collection module is electrically connected to the positive pole of the high-voltage power supply through the main board control module and is grounded.

As a further improvement, the two ends of the hafnium wire are fixed with insulating caps, the insulating support frame is an upright I-shaped structure frame with upper and lower arms, and the upper and lower arms are opened toward the side of the air inlet fence. There is a caulking, the hafnium wire is embedded in the caulking, the hafnium wire is tensioned between the upper and lower arms, and the insulating caps at both ends of the hafnium wire are located on the outer side of the upper and lower arms, so that the hafnium wire is tensioned as a straight line .

Preferably, the highest voltage converted by the high-voltage power supply from the mains is not less than 10,000 volts.

Preferably, the metal long plate is made of stainless steel, and the insulating clip cap is made of ceramic.

The beneficial effects of the present invention are: the use of high-purity slender hafnium metal wire as the discharge electrode in the high-voltage electric field, and the metal dust collection module to generate ion wind with sufficient air volume, no need to add a fan to drive the air flow, so there is almost no noise, and can Efficiently and quickly adsorb harmful particles in the air and kill bacteria; in addition, there is no ozone or only a small amount of ozone generated during the working process, which does not harm the health of users; the air purifier of the present invention has significant advantages over similar products on the market, and has good advantages Market prospects.

Description of the drawings

Figure 1 is an exploded view of the structure of the best specific embodiment of the air purifier of the present invention;

Figure 2 is a process flow diagram of the preparation of hafnium wire.

Among them: 1. Hafnium wire; 2. Dust collection module; 3. High voltage power supply; 4. Main board control module; 5. Insulation support frame; 6. Air inlet fence; 7. Air outlet fence; 8. Button function indicator board; 9. Top cover; 10. Base; 11. Caulking; 12. Insulation card cap; 13. Metal long plate; 14. Insulation module seat.

Detailed ways

The present invention will be further described below in conjunction with the drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those of ordinary skill in the art can realize that the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not used to limit the scope of protection of the claims.

As shown in Figure 1, the air purifier of the present invention includes a chassis body, which is not shown in the figure. The figure only shows the top cover 9 and the base 10. The chassis body can be used by those skilled in the art. According to specific design requirements, combined with known technology for design. The air inlet fence 6, the air outlet fence 7, the high voltage power supply 3 and the main board control module 4 are installed in the case body. Of course, in order to facilitate man-machine interaction, a key function indicator board 8 is also provided. An insulating support frame 5 is also provided in the cabinet body. In a preferred embodiment, the insulating support frame 5 is an upright I-shaped structure frame with upper and lower arms (as shown in Figure 1). The insulating support frame can be ceramic or insulating. Made of insulating materials such as plastic.

In the air purifier of the present invention, at least one hafnium wire 1 made of high-purity hafnium is installed on the insulating support frame 5 on one side of the air inlet fence 6. In specific implementation, the diameter of the hafnium wire is 0.05-0.5 mm; In addition, the hafnium purity of the hafnium wire should be higher than 99% (of course, the higher the purity, the better), because the trace chemical reaction products produced by air ionization have a strong corrosive effect and will directly act on the hafnium wire of the discharge electrode , Because the high purity hafnium metal wire has high oxidation resistance and corrosion resistance, it does not affect the long-term normal operation of the hafnium metal wire discharge electrode. When there are multiple hafnium metal wires, the hafnium metal wires are arranged parallel to each other, and all the hafnium metal wires may be located on the same plane or not on the same plane.

In order to facilitate the installation and good working condition of the hafnium metal wire, the two ends of the hafnium metal wire 1 are fixed with insulating clip caps 12 (which can be made of ceramic material or other insulating materials), and the upper and lower arms of the insulating support frame 5 face The air inlet fence 6 is provided with caulking seams 11 on one side. The hafnium metal wire 1 is embedded in the caulking seam 11. The hafnium metal wire is located on the inner side of the upper arm caulking and the lower arm caulking, that is, straightened between the upper and lower arms. In addition, the insulating caps 12 at both ends of the hafnium wire are located on the outer side of the caulking 11 (that is, the outer side of the upper and lower arms) so that the hafnium wire is tensioned in a straight line. In other words, the distance between the upper and lower arms is basically the same as the distance between the insulating caps at both ends after the hafnium wire is straightened. In the case of multiple Hafnium wires, the caulking can also be multiple, and the same caulking can also be embedded with several hafnium wires, which can be set according to specific product requirements.

In the air purifier of the present invention, the insulating support frame 5 is located on one side of the air outlet fence 7, and a dust collection module 2 of conductive metal material is installed; the dust collection module 2 is a long strip, and its installation direction is the same as that of the hafnium metal wire 1. The stretching direction is parallel (that is, the linear direction where the hafnium wire is tensioned as a straight line, which is perpendicular to the base 10 in the preferred embodiment, as shown in FIG. 1); in a specific implementation, the dust collection module 2 is composed of a plurality of blocks The metal long plates 13 with smooth surfaces that are arranged parallel to each other are installed on the insulating module base 14, and there is a gap for air circulation between adjacent metal long plates 13; the best material of the metal long plates 13 is stainless steel. In order to facilitate cleaning, replacement and maintenance of the dust collection module, the insulating module base 14 and the insulating support frame 5 are designed as a pluggable connection structure. This type of structure can be designed according to specific conditions by those skilled in the art, and this specification will not elaborate.

The hafnium wire 1 and the dust collection module 2 of the air purifier of the present invention are electrically connected to the high-voltage power supply 3 through the main board control module 4. In the specific best implementation: the shortest distance (vertical distance from the hafnium wire 1 to the dust collection module 2) ) Is 30～100mm. In the case of multiple hafnium wires, the shortest distance (vertical distance) from each hafnium wire to the dust collection module is 30～100mm; the length of the hafnium wire is equal to that of the long metal plate. The length is basically the same. In order to ensure sufficient purification effect, the highest voltage after the high-voltage power supply 3 converts the city power (generally 220V in China) is not less than 10,000 volts.

The following further explains the working principle of the present invention, which is mainly divided into two situations:

The first case: the hafnium wire 1 is electrically connected to the positive pole of the high-voltage power supply 3 through the main board control module 4, and the dust collection module 2 is electrically connected to the negative pole of the high-voltage power supply 3 through the main board control module 4. The high-voltage power supply generates a voltage above 10,000 volts. After passing through the main board control module 4, the positive electrode is connected to the hafnium wire, and the negative electrode is connected to the dust collection module and grounded. After the hafnium wire is loaded with the high-voltage anode, due to the principle of high-voltage tip discharge, a high-voltage electric field is formed in the area between the hafnium wire and the dust collection module. Due to the material characteristics of the high-purity hafnium wire, the small radius of curvature and good electrical conductivity The electron work function of the metal surface is extremely low. The electrons in the hafnium wire are in a long-term excited state, which causes the hafnium wire to produce corona initiation voltage. When the applied voltage and the average field strength are still low, the hafnium wire The nearby field strength is already very large. As the voltage increases, a strong field strength is generated in a very small area near the hafnium wire and forms a corona zone, but it will not enter the stream discharge state. At this time, the corona discharge remains uniform. , Stable nature, belongs to the long-existing stable electronic avalanche nature of self-sustained discharge, the air in the corona zone is ionized into positive ions and electrons, the process of gas molecules ionization produces a large number of electrons, this one becomes two, two becomes four The electron multiplication process forms an electron avalanche. The electron avalanche occurs in the extremely small corona area near the extremely small hafnium wire. The electrons quickly move to the surface of the hafnium wire and are neutralized and absorbed due to the ionization formed by the hafnium wire The area is extremely small, almost negligible compared to the high-voltage electric field. The electrons produced by air ionization will be neutralized and absorbed by the hafnium wire immediately, without generating ozone or only micro-ozone, and positive ions are constantly being pushed to the outer ionization area In space, a large number of positive ions are attached to dust or air molecules. The charged dust or air molecules move radially toward the stainless steel dust collection module (negative electrode) under the action of the strong electric field between the hafnium wire and the dust collection module, thereby forming A large amount of ion wind does not need a fan, so there will be no fan-like operating noise. During the movement of a large amount of ion wind, a large amount of air flow can be formed on the one hand, and on the other hand, due to the positively charged dust particles or bacteria and other pollutants in the air under the action of the electric field, the movement kinetic energy generated and the electric charge when reaching the dust collecting plate And the energy generated can achieve the effect of adsorbing dust on the dust collecting plate and killing bacteria, and efficient dust removal and sterilization. Due to the characteristics of the high-voltage electric field, the adsorption force of nanometer ultrafine particles smaller than PM0.1 (0.1um, about 1/500 of the thickness of human hair), which is extremely harmful to the human body, is as high as 99%.

The second case: the hafnium wire 1 is electrically connected to the negative pole of the high-voltage power supply 3 through the main board control module 4, and the dust collection module 2 is electrically connected to the positive pole of the high-voltage power supply 3 through the main board control module 4. The high-voltage power supply generates a voltage above 10,000 volts. After passing through the main board control module, the negative electrode is connected to the hafnium wire, and the positive electrode is connected to the stainless steel dust collection module and grounded. After the hafnium metal wire is loaded with the high-voltage negative electrode, due to the principle of high-voltage tip discharge, a high-voltage electric field is formed between the hafnium metal wire (line) and the dust collection module (plate). Due to the high-purity hafnium metal wire material characteristics of the discharge, a small radius of curvature , Good conductivity and very low electron work function on the metal surface. The electrons in the hafnium wire are in a long-term excited state. When the high voltage is connected, due to the material characteristics of the high purity hafnium wire, a large number of low energy level electrons are directly from the hafnium Released from the surface of the metal wire, the released large amount of low-level electrons quickly move radially to the dust collection module (positive electrode). At this time, the high-purity hafnium metal wire releases a large number of low-level electrons with uniform and stable properties, belonging to long-term strong field electrons. Emission, a large number of low-energy electrons quickly combine with air molecules to form a large number of negative ions. These negative ions continue to move radially to the dust collection module (positive electrode) under the action of the electric field, and collide with neutral dust particles, resulting in charge transfer and momentum During the movement of the ion wind, a large amount of air flow can be formed on the one hand, and on the other hand, the kinetic energy generated by the electric field caused by the charged dust and air molecules in the air can reach the smooth surface of the dust collection module. The energy generated by the neutralization of the electric charge achieves the effect of adsorbing dust on the stainless steel dust collecting plate and killing bacteria, and can achieve efficient dust removal and sterilization in air purification.

This description also describes the preparation and processing of hafnium metal wire: the processing of hafnium metal wire uses zirconium sand as a raw material to prepare hafnium metal wire. The process flow is shown in Figure 2.

First, the sponge hafnium is smelted by electronic vacuum, and then purified into hafnium ingots with a purity of more than 99%. Then, after rotary forging, it is first produced into a 3.5mm diameter silk embryo, and then the wire drawing die is selected according to the 0.2mm diameter reduction each time. The drawing die is accurate The processing rate of each pass is less than or equal to 5%. In the drawing process, soap flakes should be used to enhance the lubrication of the hafnium wire surface. After 17 similar drawing procedures, a wire with a diameter of 0.23mm is obtained, and the surface is finely polished to obtain 0.2mm High-purity hafnium metal wire, the surface of the wire is not allowed to have cracks, lint, burrs and grooves visible to the naked eye. The surface of the hafnium metal wire should show a metallic color, and the color should be uniform and shiny.

The hafnium wire in the present invention is processed into a thin filament with a diameter of 0.05～0.5mm, the density of the hafnium wire is 13.19g/cm ³ (20℃), the melting point is 2222±30℃, the boiling point is 5400℃, and it is resistant to It has good thermal conductivity at high temperature, the thermal neutron absorption rate is as high as 115b, has high oxidation resistance, corrosion resistance (chemical inertness), good electrical conductivity, the electron configuration of its atoms has very low electron work function, hafnium metal wire [In 1998, Carl Collins, a professor of physics in Texas, believed that the average energy of X-rays used for bombardment was about 40 kiloelectron volts, and each hafnium decayed -178m2 to emit gamma The energy of the ray reaches 2.5 MeV, and the emitted energy is 60 times the input energy]. Therefore, the discharge electrode of the new high-efficiency ion wind air purifier of the present invention adopts hafnium metal wire, which has good conductivity and extremely low electron work function on the metal surface. The electrons in the hafnium metal wire are in an excited state for a long time, and after high voltage is connected, low energy is released. Large amount of electrons and large volume of ion wind.

Since the high-purity hafnium metal wire discharge electrode is connected to the high-voltage negative electrode, a large number of low-level electrons are released under the action of high pressure. When the oxygen molecule O ₂ in the air obtains low-energy electron energy, it will not be decomposed into 2 oxygen atoms. Ozone O ₃ will be formed; because the high-purity hafnium wire releases a large amount of low-level electrons, there are many negative ions in the high-voltage electric field, so the ion wind volume is large.

In addition, when the high-purity hafnium metal wire emitter is connected to the high-voltage positive electrode, the electric field and current density in the ionization zone, and the electric field strength E in the ionization zone satisfy the Poisson equation. Whether in the ionization zone or in the migration zone outside the ionization, the discharge electrode The electrical conductivity (conductivity) of the material is proportional to the electric field strength and current density, and the current density/electric field strength is proportional to the ionic wind volume. Under the same conditions of applied voltage and other factors, the material of the discharge electrode has better conductivity. The more active, the greater the ion wind volume.

All in all, the present invention uses high-purity slender hafnium metal wire as the discharge electrode in the high-voltage electric field, and cooperates with the metal dust collection module to generate ion wind with sufficient air volume. There is no need to add a fan to drive the air flow, so there is almost no noise, and it can efficiently and quickly absorb air. It can eliminate harmful particles and kill bacteria. The dust removal and sterilization rate is as high as 99%. There is no ozone or only micro ozone during the working process, so it will not harm human health. There is no sound during the entire device work process and does not affect the sleep of indoor personnel.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the foregoing embodiments. The foregoing embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and improvements, these changes and improvements all fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

An air purifier comprising a case body and an air inlet fence, an air outlet fence, a high voltage power supply and a main board control module installed on the case body, characterized in that: the case body is also provided with an insulating support frame, the insulating support frame is located at the inlet At least one hafnium wire made of high-purity hafnium is installed on one side of the wind fence, and a dust collecting module made of conductive metal is installed on one side of the insulating support frame on the air outlet fence; the hafnium wire and the dust collecting module The main board control module is electrically connected with the high-voltage power supply.
The air purifier according to claim 1, wherein the diameter of the hafnium metal wire is 0.05-0.5 mm, and the hafnium purity of the hafnium metal wire is higher than 99%.
The air purifier according to claim 2, wherein the hafnium metal wires are plural, which are installed in parallel on the insulating support.
The air purifier according to claim 3, wherein the shortest distance between the hafnium wire and the dust collection module is 30-100 mm.
The air purifier according to claim 1, wherein the dust collection module has a long strip shape, and the installation direction of the dust collection module is parallel to the stretching direction of the hafnium wire.
The air purifier according to claim 5, characterized in that: the dust collection module is composed of a plurality of metal long plates with smooth surfaces arranged in parallel with each other and mounted on the insulating module seat, and the adjacent metal long plates There is a gap for air circulation; the insulating module base and the insulating support frame are pluggable connection structures; the length of the hafnium metal wire is substantially the same as the length of the metal long plate.
The air purifier according to claim 6, wherein the hafnium wire is electrically connected to the positive pole of the high-voltage power supply through the main board control module, and the dust collection module is electrically connected to the negative pole of the high-voltage power supply through the main board control module and is grounded.
The air purifier according to claim 6, wherein the hafnium wire is electrically connected to the negative pole of the high-voltage power supply through the main board control module, and the dust collection module is electrically connected to the positive pole of the high-voltage power supply through the main board control module and is grounded.
The air purifier according to any one of claims 1 to 8, wherein the two ends of the hafnium wire are fixed with insulating clip caps, and the insulating support frame is an upright I-shaped frame with upper and lower arms. In the structural frame, the upper and lower support arms are provided with caulking seams on the side facing the air inlet fence, the hafnium metal wire is embedded in the caulking seam, the hafnium metal wire is tensioned between the upper and lower support arms, and the insulating clamping caps at both ends of the hafnium metal wire They are all located on the outer side of the upper and lower arms to make the hafnium wire tensioned into a straight line.
The air purifier according to any one of claims 1 to 8, characterized in that the highest voltage converted by the high-voltage power supply from the mains is not less than 10,000 volts.
The air purifier according to claim 6, wherein the metal long plate is made of stainless steel.
The air purifier according to claim 9, wherein the insulating clip cap is made of ceramic material.