CN204486035U - A kind of electrostatic discharge protection device and use its air purifier - Google Patents

Abstract

An electrostatic discharge protection device and an air purifier using the same, wherein the electrostatic discharge protection device includes an electrostatic dust collection device and a resistor; the electrostatic dust collection device includes two sets of grounding collecting plates, a positive collecting plate and a positive corona wire; the resistance is two One group is bridged between the positive collector plate and the ground wire, and the other group is bridged between the positive electrode corona wire and the ground wire. The air purifier using it includes a fan, a body and an air filter unit placed in the body, the fan is located on the top of the air filter unit, the bottom of the body is provided with an air inlet, and the air filter unit is located above the air inlet; the air filter unit From bottom to top, it includes electrostatic dust collection device, adsorption device, and ultraviolet sterilization and decomposition device. The utility model can effectively prevent the occurrence of static electricity strikes or electric shock accidents, and has excellent dust and odor removal effects, and has the characteristics of large adsorption capacity, high efficiency, easy cleaning and long service life.

Description

An electrostatic discharge protection device and an air purifier using the same

technical field

The utility model relates to an electrostatic discharge protection device and an air purifier using the device.

Background technique

In the prior art, the electrostatic dust collection device including its shell is all metal parts, so it still has high-voltage static electricity after it stops working. When the user takes it out and cleans it, it is easy to be hit by static electricity, and even a dangerous electric shock situation occurs.

On the other hand, the existing air purifiers use the adsorption method of HEPA filter + photocatalyst + activated carbon, which has many disadvantages:

1. Dust removal mainly depends on the HEPA filter, but the HEPA filter has limited adsorption capacity, it is easy to block the filter holes, and the dust accumulates, not only has no sterilization effect, but also easily causes secondary pollution, and the filter is a consumable, dust accumulation After reaching a certain level, it can only be scrapped and replaced with a new filter, and the replacement cost is high;

2. Deodorization mainly depends on photocatalyst photolysis of organic matter, such as toluene, formaldehyde, etc., and then activated carbon adsorption, but the photocatalyst net is mostly nickel substrate, aluminum substrate or non-woven substrate sprayed with titanium dioxide, after 1 to 3 months After use, the titanium dioxide coating will fall off and lose its effect; and because the decomposition efficiency is not high, the organic matter cannot be completely decomposed, and some organic matter will pass through the photocatalyst layer and enter the activated carbon layer. However, due to the limited adsorption effect of ordinary activated carbon nets, the adsorption is generally not complete, and some organic matter is still released into the air, especially toluene, formaldehyde and some bacteria with large molecular weight, which cannot completely absorb the remaining organic matter.

Utility model content

In order to solve the above problems, the utility model proposes an electrostatic discharge protection device and an air purifier using it.

The technical scheme of the utility model is as follows:

An electrostatic discharge protection device, including an electrostatic dust collection device and a resistor;

The electrostatic precipitator includes two sets of grounding collecting plates, positive collecting plates and positive corona wires; the grounding collecting plates of the first group are arranged alternately with the positive collecting plates; The positive electrode collector plate is connected to the positive electrode of the power supply; the positive electrode corona wire is alternately arranged with the second set of grounded collector plates, the second set of grounded collector plates is connected to the ground wire, and the positive electrode corona wire is connected to the ground wire. The wire is connected to the positive pole of the power supply;

There are two groups of resistors, and each group of resistors includes at least one resistor; one group is bridged between the positive collector plate and the ground wire, and the other group is bridged between the positive electrode corona wire and the ground wire .

Preferably, silicon dioxide is attached to the surfaces of the grounded collector plate and the positive electrode collector plate.

Preferably, the electrostatic precipitator further includes an insulating shell with upper and lower openings closed around it.

The air purifier using the electrostatic discharge protection device according to claim 1 comprises a fan, a fuselage and an air filter unit placed in the fuselage, the fan is located on the top of the air filter unit, and the machine An air inlet is provided at the bottom of the body, and the air filter unit is located above the air inlet; the air filter unit includes an electrostatic dust collection device, an adsorption device, and an ultraviolet sterilization and decomposition device from bottom to top.

Preferably, the air filter unit further includes a filter screen located below the electrostatic precipitator.

Preferably, the material used in the adsorption device is activated carbon fiber, the activated carbon fiber has a diameter of 5-20 μm, a specific surface area of 1000-1500 m ² /g, and a pore diameter of 1.0-4.0 nm.

Preferably, the ultraviolet sterilization and decomposition device includes a TiO ₂ photocatalyst net and an ultraviolet light source placed on one side of the photocatalyst net.

Preferably, the body is also provided with an openable and closable door, and the electrostatic dust collector, the adsorption device and the ultraviolet sterilization and decomposition device are detachably installed in the inner cavity of the body.

Further, the fuselage is also provided with a dismantling and power-off protection device; the dismantling and power-off protection device includes a push rod and a micro switch; the push rod is arranged on the inner side of the door; the micro switch is set There are micro switch shrapnel, micro switch output line and micro switch input line; the micro switch is in contact with the ejector rod when the door is opened, and is separated from the ejector rod when the door is closed; The input line of the micro switch is connected to an external power supply; the output line of the micro switch is connected to the main control board to provide power for the air purifier.

The beneficial effects of the utility model are:

1. The air purifier is equipped with an electrostatic discharge protection device, which can effectively prevent the occurrence of electrostatic shock or electric shock accidents.

2. The method of deodorizing the air purifier adopts the order of first adsorption and then photolysis, which can more effectively eliminate odors, and the adsorption material is activated carbon fiber, which has a large adsorption capacity and high efficiency. Through hot steam desorption, nitrogen desorption, and drying Or electric heating and blowing can activate the activated carbon fiber and reuse it; the photodecomposition material uses photocatalyst fiber, especially anatase nano-TiO ₂ , which decomposes organic matter quickly and does not participate in chemical reactions, so it can be used permanently in theory.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model.

In the attached picture:

Fig. 1～5 is the circuit schematic diagram of the electrostatic discharge protection device in the utility model;

Fig. 6 is the schematic diagram of the electrostatic dust collection device in the utility model;

Figures 7 to 8 are schematic structural views of the electrostatic discharge protection device in the electrostatic dust collection device of the present invention;

Fig. 9～Fig. 10 are the structural representations of the air purifier in the utility model;

Fig. 11 is a schematic structural view of the dismantling protection device of the air purifier when the door is opened in the utility model;

Fig. 12 is a structural schematic diagram of the protection device for dismantling the air purifier when the door is closed in the utility model.

1-resistor; 2-housing; 3-fan; 4-body; 41-air inlet; 42-door; 43-disassembly power protection device; 431-rod; 432-micro switch; 4321-micro Switch shrapnel; 4322- micro switch output line; 4323- micro switch input line; 5- air filter unit; 51- filter; 52- electrostatic dust collection device; - positive corona wire; 53 - adsorption device; 54 - ultraviolet sterilization decomposition device.

Detailed ways

An electrostatic discharge protection device, comprising an electrostatic dust collector 52 and a resistor 1;

The electrostatic precipitator 52 includes two sets of grounded collector plates 521, positive electrode collector plates 522 and positive electrode corona wires 523; the grounded collector plates 521 of the first group and the positive electrode collector plates 522 are arranged alternately, The ground collecting plates 521 are connected to the ground wire, and the positive collecting plates 522 are connected to the positive pole of the power supply; the positive corona wires 523 are alternately arranged with the second group of the ground collecting plates 521, and the second group of the ground collecting plates 521 are arranged alternately. 521 is connected to the ground wire, and the positive electrode corona wire 523 is connected to the positive electrode of the power supply;

The resistors 1 are two groups, and each group of resistors 1 includes at least one resistor 1; one group is bridged between the positive collector plate and the ground wire, and the other group is bridged between the positive electrode corona wire and the ground wire. between lines.

As shown in Figures 1 to 5, the main components of the electrostatic discharge protection device on the electrostatic dust collector 52 are two groups of resistors 1 with relatively large resistance values. The dust collection device 52 is between the contact of the positive electrode collecting plate 522 and the ground wire, and the other bridge is connected between the contact of the positive electrode corona wire 523 and the ground wire. Two groups of resistors 1 respectively form two lines of the positive electrode collecting plate 522 dust collecting pole and the positive electrode corona wire 523; The circuit formed by the latter is connected in parallel with the resistor 1, and the two sides of the parallel circuit are electrically connected with the positive pole of the power supply with switch control and the ground wire respectively; The ground plate 521 is connected in series, and the circuit formed by the two is connected in parallel with the resistor 1, and both sides of the parallel circuit are electrically connected to the positive pole of the power supply with switch control and the ground wire respectively.

a. When the machine is powered on, since the resistance value of the resistor 1 is large, the current passing through the resistor 1 is extremely small, and its power can be ignored, which does not affect the normal use of the electrostatic dust collection device 52. At this time, the positive pole The high-voltage positive voltage carried by the collecting plate 522 is equal to the positive output value (Fig. 3) of the high-voltage pack, and the high-voltage negative voltage carried by the positive electrode corona wire 523 is equal to another positive output value (Fig. 2) of the high-voltage pack;

b. As shown in Figure 2, when the machine is turned off or the power is cut off, that is, the high voltage pack stops supplying power to the electrostatic dust collection device 52, that is, when the power supply of the electrostatic dust collection device 52 is cut off, the positive electrode of the electrostatic dust collection device 52 Collecting plate 522—resistor 1—ground wire forms a loop, and the positive charge on the positive collector plate 522 passes through resistor 1 to the ground wire to release the charge (Figure 5); the positive electrode corona wire 523 of the electrostatic dust collector 52— Resistor 1-ground wire forms a loop, and the positive charge on the positive electrode corona wire 523 passes through the resistor 1 to the ground wire to release the charge, so that the charge on the electrostatic dust collector 52 is released (Fig. 4) , then the positive electrode collector plate 522 and the positive electrode corona wire 523 are no longer charged with static electricity. The whole process can be completed in about 3 seconds. By using the electrostatic discharge protection device 52, the electrostatic dust collector 52 is not charged, and can be safely taken out for cleaning or maintenance.

Adopt described electrostatic precipitator 52, have following advantages:

(1) High dust removal efficiency; (2) Can purify a large amount of air; (3) The particle size range that can be removed; (4) Can purify dusty flue gas with high temperature; (5) Simple structure, low air velocity, The pressure loss is small; (6) energy consumption is lower than other types of dust collectors; (7) the electric dust collector can realize microcomputer control and remote operation; (8) the electrostatic dust collection device 52 can be cleaned, and can be repeated after drying. use, not consumables.

Preferably, silicon dioxide is attached to the surface of the ground collecting plate 521 and the positive electrode collecting plate 522, and the function of killing microorganisms of the silicon dioxide is enhanced under the action of ultraviolet light.

Preferably, the electrostatic precipitator 52 also includes an insulating shell 2 with upper and lower openings closed around it.

In the prior art, the electrostatic precipitator 52 including its shell 2 is a metal part, so it still has high-voltage static electricity after it stops working. When the user takes out the electrostatic precipitator 52 for cleaning, it is easy to Subject to static electricity, or even dangerous electric shock situation. In the present utility model, the casing 2 uses known insulating materials to wrap the positive electrode collecting plate 522, the positive electrode corona wire 523 (with 4000V-8000V high-voltage static electricity during operation) and other charged parts, and does not It will touch the pole plate or pole wire of the electrostatic precipitator 52, so as to avoid the danger of electrostatic shock.

The air cleaner using the electrostatic discharge protection device includes a blower fan 3, a fuselage 4 and an air filter unit 5 placed in the fuselage 4, the blower fan 3 is located on the top of the air filter unit 5, and the fuselage 5 The bottom is provided with an air inlet 41, and the air filter unit 5 is located above the air inlet 41; the air filter unit 5 includes an electrostatic dust collector 52, an adsorption device 53, and an ultraviolet sterilization and decomposition device 54 from bottom to top.

As shown in Figures 9 and 10, the fan 3 is located on the top of the air filter unit 5, the bottom of the fuselage 4 is provided with an air inlet 41, and the air filter unit 5 is located above the air inlet 41; The air filter unit 5 includes an electrostatic dust collector 52, an adsorption device 53, and an ultraviolet sterilization and decomposition device 54 from bottom to top.

The electrostatic dust collection device 52 removes fine particulate matter PM2.5, the adsorption device 53, such as activated carbon fiber, absorbs organic matter, and the ultraviolet sterilization and decomposition device 54 decomposes the remaining organic matter from previous filtration. As shown in Figure 9, the best filtering sequence for each component of the air filter unit 5 is: first remove dust, then absorb organic matter to remove more than 90% of peculiar smell, and finally photolyze the remaining part of organic matter to achieve complete dust removal and deodorization the goal of.

However, in the prior art, the dusty gas is first subjected to photolysis and then adsorbed. Due to the low sustainability and efficiency of ordinary photocatalysts, the ability to decompose organic matter is limited, and the adsorption efficiency of ordinary activated carbon is low, which cannot completely absorb odors. , leading to incomplete adsorption, and the purified air often still has peculiar smell. However, the utility model adopts the method of first adsorption and then photolysis, and adopts activated carbon fiber for odor adsorption and photocatalyst fiber for photolysis, which can completely remove odor.

Preferably, the air filter unit 5 further includes a filter screen 51 located below the electrostatic precipitator 52 .

After the air enters from the air inlet 41, it first passes through the filter screen 51, and then passes through the electrostatic dust collection device 52; the filter screen 51 is generally made of metal material, and adopts a multi-layer stacked stacking method, which can remove volume. Larger particles or pollutants such as animal hair, thereby reducing the pressure on subsequent components for filtration.

Preferably, the material used for the adsorption device 53 is activated carbon fiber, the activated carbon fiber has a diameter of 5-20 μm, a specific surface area of 1000-1500 m ² /g, and a pore diameter of 1.0-4.0 nm.

The activated carbon fiber mainly plays the role of highly efficient adsorption of organic matter, such as formaldehyde, toluene, etc., thereby removing peculiar smell. Ordinary granular activated carbon is a kind of porous carbon that has been activated and is in the form of powder or granules; while the activated carbon fibers are in the form of fibers, covered with micropores, with a diameter of 5 to 20 μm and an average specific surface area of 1000 to 1000 μm. About 1500m ² /g, the average pore size is 1.0-4.0nm, and the micropores are evenly distributed on the surface of the fiber. Its adsorption capacity for organic gases is several to dozens of times higher than that of granular activated carbon in the air. Under the standard purifier test environment, The adsorption rate of the activated carbon fiber to peculiar smell reaches more than 95%. Moreover, after the activated carbon fiber absorbs a certain amount of organic matter or dust, it will gradually reach a saturated state, and the adsorption effect will gradually decrease. The former state has the adsorption capacity again, so the activated carbon fiber can be reused to save costs.

Preferably, the ultraviolet sterilization and decomposition device 54 includes a TiO ₂ photocatalyst net and an ultraviolet light source placed on one side of the photocatalyst net.

TiO ₂ photocatalyst network generally adopts anatase nanometer TiO ₂ photocatalyst fiber. Certain organic pollutants still remain in the air passing through the activated carbon fiber adsorption device 53 . Since the photocatalyst fiber can play a catalytic role under the light, when the anatase nano-TiO ₂ obtains energy under the irradiation of an ultraviolet light source (370-385nm), the electrons on the particle surface are activated and escape from the original orbit. At the same time, positively charged holes are generated on the surface, and the escaped electrons have strong reducing properties, while the holes have strong oxidizing properties. After the two react with the water vapor in the air, active oxygen and hydroxyl radicals will be generated. Active oxygen and hydroxyl radicals can oxidize and decompose organic matter, pollutants, odors, bacteria, etc. in the air that have not been absorbed before into harmless carbon dioxide and water, achieving the purification effect of dust removal and odor removal. Since the photocatalyst fiber itself does not undergo chemical changes, it can be used efficiently and permanently.

Preferably, the fuselage 4 is also provided with an openable and closable door 42, and the electrostatic dust collecting device 52, the adsorption device 53 and the ultraviolet sterilization and decomposition device 54 are detachably mounted on the fuselage 4. lumen.

The electrostatic dust collection device 52, the adsorption device 53 and the ultraviolet sterilization and decomposition device 54 adopt a pull-out structure, such as a slide rail drawer type, or are fixed with the fuselage with screws, and the screws are loosened when necessary. Extractable. The advantage of this is that after a period of filtering operation, dust and other foreign matter will be absorbed and separate cleaning needs to be carried out regularly, or some failures need to be repaired or replaced. At this time, the door 42 can be opened, and the filter can be easily removed from the filter. The corresponding parts are taken out from the fuselage 4 for cleaning or maintenance work.

Further, the fuselage is also provided with a dismantling and power-off protection device 43; the dismantling and power-off protection device 43 includes a push rod 431 and a micro switch 432; the push rod 431 is arranged on the inner side of the door 42; The micro switch 432 is provided with a micro switch shrapnel 4321, a micro switch output line 4322 and a micro switch input line 4323; the micro switch 432 is in contact with the push rod 431 when the door 42 is opened. The door 42 is separated from the push rod 431 when it is closed; the micro switch input line 4323 is connected to an external power supply; the micro switch output line 4322 is connected to a main control board for providing power for the air purifier.

During the long-term use of the air purifier, it is inevitable to check, take out, clean, and replace internal functional parts, mainly referring to the filter screen 51, electrostatic dust collection device 52, adsorption device 53, and ultraviolet sterilization and decomposition device 54 , when these operations are to be performed, the door 42 plays the role of protection against machine disassembly and power failure. When the door 42 is opened and the air purifier is in a power-off state, the above operations can be performed safely.

It works as follows:

1. As shown in Figure 11, when the door 42 is opened, the push rod 431 is separated from the micro switch 432, and the micro switch shrapnel 4321 of the micro switch 432 is under the action of its own internal elasticity Tilt up, so that the positive and negative poles inside the micro switch 432 are disconnected at the same time, that is, the machine circuit board and the positive and negative poles of the power line are disconnected at the same time, and the machine is in an uncharged state. At this time, the internal functions of the machine can be safely checked. Parts are inspected, removed for cleaning or replaced.

2. As shown in Figure 12, when the door 42 is closed, the push rod 431 contacts the micro switch 432, and the push rod 431 pushes the micro switch shrapnel 4321 of the micro switch 432 Press down to make the positive and negative poles inside the micro switch 432 connected simultaneously, that is, the positive and negative poles of the circuit board and the power line are connected simultaneously, and the machine is in a power-on standby state and can be turned on at any time.

Claims (9)

1. an electrostatic discharge protection device, is characterized in that, comprises electrostatic dust-collecting device and resistance;

Described electrostatic dust-collecting device comprises two groups of ground connection collecting boaries, positive pole collecting board and positive corona silk; Ground connection collecting board described in first group and described positive pole collecting board are alternately arranged, and described in first group, ground connection collecting board is connected with ground wire, and described positive pole collecting board is connected with positive source; Described in described positive corona silk and second group, ground connection collecting board is alternately arranged, and described in second group, ground connection collecting board is connected with ground wire, and described positive corona silk is connected with positive source;

Described resistance is two groups, often organizes resistance and at least comprises a resistance; One group bridges between described positive pole collecting board and described ground wire, and another group bridges between described positive corona silk and described ground wire.

2. electrostatic discharge protection device as claimed in claim 1, is characterized in that, described ground connection collecting board and described positive pole collecting board surface attachment silica.

3. a kind of electrostatic discharge protection device as claimed in claim 1, is characterized in that, described electrostatic dust-collecting device also comprises the insulation crust of all round closure upper and lower opening.

4. use the air purifier of electrostatic discharge protection device as claimed in claim 1, it is characterized in that, the air filter unit comprising blower fan, fuselage and be placed in described fuselage, described blower fan is positioned at the top of described air filter unit, described fuselage bottom is provided with air inlet, and described air filter unit is positioned at above described air inlet; Described air filter unit comprises electrostatic dust-collecting device, adsorbent equipment, ultraviolet sterilization decomposer from the bottom to top.

5. air purifier as claimed in claim 4, it is characterized in that, described air filter unit also comprises the screen pack be positioned at below described electrostatic dust-collecting device.

6. air purifier as claimed in claim 4, it is characterized in that, described adsorbent equipment material therefor is NACF, and the diameter of described NACF is 5 ~ 20 μm, and specific area is 1000 ~ 1500m ²/ g, aperture is 1.0 ~ 4.0nm.

7. air purifier as claimed in claim 4, it is characterized in that, described ultraviolet sterilization decomposer comprises TiO ₂photocatalyst net and the ultraviolet source being placed in described photocatalyst net side.

8. air purifier as claimed in claim 4, it is characterized in that, described fuselage is also provided with door to be opened/closed, and described electrostatic dust-collecting device, described adsorbent equipment and described ultraviolet sterilization decomposer are detachably installed on the inner chamber of described fuselage.

9. air purifier as claimed in claim 8, it is characterized in that, described fuselage is also provided with tears tester in power-down state protective device open; Described tester in power-down state protective device of tearing open comprises push rod and microswitch; Described push rod is arranged on the inner side of described door; Described microswitch is provided with microswitch shell fragment, microswitch output line and microswitch input line; Described microswitch when described door is opened with described ejector pin contact, be separated with described push rod when described door closedown; Described microswitch input line connects external power source; Described microswitch output line connects master board, for providing power supply for described air purifier.