JPH08309229A - Electrostatic air cleaner - Google Patents

Abstract

PURPOSE: To provide a novel electrostatic air cleaner which is capable of performing a function in addition to an original dust collection function. CONSTITUTION: In the electrostatic air cleaner having a constitution such that a dust collection electrode 11 and dust collection paper 13 are attached to the peripheral surface of a cylindrical case 10, and an ionizing electrode 12 is arranged at the outside of the lower part of the cylinder case 10, a deodorizing part having an ultraviolet ray lump 15, an optical catalyst 17 and an ozone catalyst 19 is provided in the inside of the cylinder case 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus for purifying air in a home or an office, and more particularly, to an electrostatic type apparatus configured to adsorb dust in the air by utilizing ionic wind. The present invention relates to an air cleaner.

[0002]

2. Description of the Related Art As a conventional general electrostatic air cleaner, an ionization electrode (cathode) for ionizing dust particles floating in the air, and an outer circumference of a cylindrical body for adsorbing the ionized dust particles. A dust collecting electrode (anode) attached in a ring shape on the surface (or the peripheral surface of the cylindrical body), dust collecting paper is interposed between both electrodes so as to cover the surface of the dust collecting electrode, and dust particles ionized on the dust collecting paper It is known that the device is configured to adhere. When a high voltage is applied between the ionization electrode and the dust collection electrode, a line of electric force is generated from the ionization electrode toward the dust collection electrode, which causes an ionic wind flowing between the two electrodes. The ionized air causes ambient air to flow into the device, pass through the dust collecting paper, and flow out to the outside. At this time, the dust in the inflowing air is negatively charged when it comes into contact with gas ions or electrons generated by the discharge, and the negatively charged dust particles move toward the dust collecting electrode side and adhere to the dust collecting paper.

[0003]

In the conventional electrostatic air purifier, only the dust collecting function is provided, and the deodorizing effect can hardly be expected. This is because ozone that spontaneously occurs in the ionization electrode accelerates the oxidation treatment of the malodorous substance and changes it to an odorless substance, and the deodorization treatment has extremely low efficiency. Further, since ozone is highly toxic, the ozone concentration cannot be increased, and the deodorizing effect is hardly obtained at present.

The present invention has been made in view of the above circumstances. In addition to the original dust collecting function, the space inside the cylindrical dust collecting electrode is used and a deodorizing device is provided in the space. It is an object of the present invention to provide a novel electrostatic air cleaning device that can also perform a deodorizing function.

Another object of the present invention is to provide a blower fan for forcibly sucking the external air into the apparatus, turning the blower fan on / off, turning on / off the dust collecting process, turning on the deodorizing process, An object of the present invention is to provide an electrostatic air purifying device that can perform an appropriate dust collecting / deodorizing function according to the external situation by combining the OFF states.

[0006]

An electrostatic air purifying apparatus according to claim 1 of the present application is an electrostatic air purifying apparatus having a cylindrical dust collecting electrode and an ionizing electrode provided outside the dust collecting electrode. The air cleaning device is characterized by including a deodorizing device inside the dust collecting electrode.

According to a second aspect of the present invention, in the electrostatic air purifying apparatus according to the first aspect, the deodorizing device has a photodeodorizing mechanism using a photocatalyst and an ozone deodorizing mechanism using an ozone catalyst.

An electrostatic air purifying apparatus according to a third aspect of the present invention is characterized in that, in the first aspect, a blower fan for forcibly sucking the outside air into the inside is provided.

According to a fourth aspect of the present invention, in the electrostatic air purifying apparatus according to the third aspect, dust is collected and deodorized when the blower fan is operating, and dust is mainly collected when the blower fan is not operating. And a control means for controlling the operation and non-operation of the blower fan.

[0010]

In the electrostatic air purifying device of the present invention, the deodorizing device utilizing, for example, the photocatalyst and the ozone catalyst is provided inside the cylindrical dust collecting electrode, and the deodorizing device utilizing the ion wind is used for the interior. The dust of the external air sucked in is collected to perform the dust removal process, and the deodorizing process is performed by decomposing the malodorous substances contained in the external air. When a blower fan is provided, the blower fan forcibly sucks the external air to the inside, and the processing capacity is increased. Also, by controlling so that dust is collected and deodorized when the blower fan is turned on, and mainly when dust is turned off, it is appropriate according to the external conditions such as the degree of air pollution and the size of the room to be cleaned. It is possible to perform various dust collecting and deodorizing functions.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments.

FIG. 1 is a vertical sectional view showing the construction of an electrostatic air cleaning apparatus according to an embodiment of the present invention, and FIG. 2 is a horizontal sectional view of the electrostatic air cleaning apparatus. Note that in FIG. 2, a plurality of cross-sections in FIG. 1 are combined to show the configuration thereof for easy understanding. As will be described later, the electrostatic air purifying device of this embodiment is provided with a deodorizing mechanism in addition to the dust collecting mechanism.

In FIG. 1, 1 is a case-shaped lower case whose lower side is opened, and 9 is a case-shaped upper case which is connected to the lower case 1 and whose upper and lower parts are opened. Is. 3 is a cross-sectional view showing the internal structure of the lower case 1, and FIG. 4 is a vertical cross-sectional view of the lower case 1 and its vicinity. Note that, in FIG. 4, the vertical cross section is shifted from that of FIG. 1 by 90 degrees. In the opening of the lower case 1, the cushion leg 8
A bottom lid 7 into which is pressed is attached. A blower fan 24 is provided at a connecting portion between the lower case 1 and the upper case 9. In addition, the connecting portion is an opening 40 that is partially open.

The shaft of the blower fan 24 penetrates the upper surface of the lower case 1 and extends into the lower case 1, and is connected to the motor 2 as a drive source. Further, a substrate 3 having a circuit for controlling various processing operations such as switching on / off of dust collection processing / deodorization processing is fixed to the inside of the lower case 1 with screws. Further, a power supply circuit 4 for supplying a high voltage is provided between the dust collecting electrode 11 and the ionizing electrode 12, which will be described later, on the bottom cover 7. Further, in the lower case 1, a ballast 5 for an ultraviolet lamp 15 and a lighting tube 6 which will be described later are installed. Further, a part of the upper surface of the lower case 1 is a taper portion which is inclined downward, and the taper portion is provided with an operation panel 31 for connecting to a circuit of the substrate 3 and allowing a user to operate a processing operation. Has been. Since these various electric parts are fixed to the lower case 1,
Assembling with the dust collecting part and the deodorizing part provided above this is very good.

FIG. 5 is a vertical sectional view showing the structure of the deodorizing portion in this embodiment, and FIG. 6 is a vertical sectional view showing the structure in which the deodorizing portion and a cover 20 and a dome 21 described later are removed in this embodiment.

Inside the upper case 9, there is a flange 10a at the bottom.
A cylindrical case 10 having is installed upright. Cylindrical case 10
The outer peripheral surface of the is equipped with a number of holes that serve as air passages, and the mesh-shaped dust collection electrode 11 that serves as the anode of the electrostatic dust collection mechanism is attached with screws at the position of the boss 10c. Has been. A ring-shaped ionization electrode 12 serving as a cathode of the dust collecting mechanism is fixed to the flange 10a of the cylindrical case 10 with a screw 32. The ionization electrode 12 is a thin plate-shaped discharge electrode facing upward so that corona discharge is likely to occur.
12a. A dust collecting paper 13 having electrical insulation is wound around the dust collecting electrode 11. The dust collecting paper 13 is similar to a kitchen towel. The dust collecting paper 13 is
Is fixed so as to be pushed into the inside of the cylindrical case 10. The pressing lever 14 rotates about a shaft 14a at the lower end as a fulcrum, and a claw 14b at the upper part thereof is locked to the cylindrical case 10 (see FIG. 6).

In the lower opening of the cylindrical case 10, a seal ring 25 whose peripheral portion is sealed and whose central portion is open is fitted to form an air flow path. In addition,
These cylindrical case 10, dust collection electrode 11, ionization electrode 12,
The dust collecting paper 13 and the pressing lever 14 constitute a dust collecting portion in this embodiment.

In this embodiment, the dust collecting electrode 11 and the ionizing electrode
By applying a high voltage from the power supply circuit 4 between 12 and 12, corona discharge is generated, air is ionized to generate ionic wind, and dust particles are charged, and dust is collected by the force of ionic wind or electric field. Dust collecting paper 13 wrapped around the electrode 11
It is designed to remove dust by adsorbing the charged dust particles. In addition, it is possible to bring about a greater dust removing effect by forcibly ventilating the air by the blower fan 24.

Inside the cylindrical case 10, there is provided a deodorizing section whose structure is shown in FIG. In the cylindrical case 10,
A rectangular tube-shaped air guide case 18 is provided, and in the center of the air guide case 18, a lamp case 16 having a bottomed rectangular tube shape and a side surface of which is an opening is provided.
Is provided. The lamp case 16 houses an ultraviolet lamp 15 that emits ultraviolet rays and generates ozone,
In addition, a photocatalyst 17 that is excited by ultraviolet rays to promote the oxidation reaction is provided in the opening on the side surface of the lamp case 16. The photocatalyst 17 is specifically made of a semiconductor of a metal oxide such as tungsten oxide, titanium oxide, or yttrium oxide, or a mixture thereof. The air guide case 18 is an ozone catalyst that neutralizes the ozone generated when the ultraviolet lamp 15 is turned on and promotes the oxidation reaction of the malodorous substance.
Holds 19 in its lower opening. Further, the air guide case 18 and the lamp case 16 form an air flow path. The ultraviolet lamp 15, the lamp case 16, the photocatalyst 17, the air guide case 18, and the ozone catalyst 19 constitute a deodorizing section in this embodiment.

The air guide case 18 has a structure that can be divided in the left and right directions, and has a substantially U-shaped cross section, that is, a first air guide case 18b and a second air guide case 18d.
Is held by the claw 18a (Fig. 2,
(See FIG. 5). The ozone catalyst 19 is sandwiched and held by both the first air guide case 18b and the second air guide case 18d.

Similarly, the lamp case 16 has a structure that can be divided into right and left parts, and includes a first lamp case 16b having a U-shaped cross section and a flat second lamp case 16c forming an opening on a side surface. It is held by the claw 16a (see FIGS. 2 and 5). The photocatalyst 17 provided on the side opening of the lamp case 16 is
It is held by being sandwiched between c and the second air guide case 18d. A reflection member 26 that reflects the ultraviolet rays from the ultraviolet lamp 15 is formed on the inner peripheral surface of the first lamp case 16b. The ultraviolet lamp 15 includes two bosses of the first air guide case 18b together with the first lamp case 16b and the reflecting member 26.
It is fixed to 18c with screws 30. Then, the photocatalyst 17 is irradiated with ultraviolet rays directly from the ultraviolet lamp 15 or after being reflected by the reflecting member 26, and the photocatalyst 17 is excited.

As described above, the lamp case 16 for holding the ultraviolet lamp 15 and the photocatalyst 17, and the air guide case 18 for holding the ozone catalyst 19 can be divided into left and right parts, respectively, and can be easily attached and detached from the main body. Has become.
That is, the deodorizing portion of this embodiment is easy to disassemble, and the ultraviolet lamp 15, the photocatalyst 17, and the ozone catalyst 19 can be replaced very easily. Therefore, the user himself / herself can replace these members and perform maintenance processing without asking the vendor. Also, the deodorizing part itself is fixed to the rib 10b of the cylindrical case 10 of the main body with screws 33,
Easy to put on and take off.

Next, the attachment of the deodorizing portion having such a structure to the cylindrical case 10 will be described. When the deodorizing part is stored in the main body (cylindrical case 10), the tip of the boss 10c for mounting the dust collecting electrode 11 provided on the cylindrical case 10 should be attached to the deodorizing part so that the deodorizing part is installed in the correct position. It contacts the air guide case 18 and plays a role of a guide. In addition, the seal ring at the bottom of the cylindrical case 10 described above.
The rib 25a and the rib 9a (see FIG. 6) for guiding and holding the deodorizing portion are provided on the 25 and the upper case 9, and the deodorizing portion is held at the correct position.

The side surfaces of the dust collecting portion / deodorizing portion as described above are covered with a slit-shaped cover 20 over the entire circumference to serve as an air intake. The cover 20 has, for example, a configuration in which lattice-shaped ribs extending in the up-down direction and air-inflow slits are alternately formed between the ribs on a cup-shaped outer periphery at a constant pitch. Further, the upper side of the dust collecting portion / deodorizing portion is covered with a hemispherical dome 21 having a brim portion on the peripheral edge. The dome 21 is provided so that the collar portion is sandwiched between the fixing ring 23 and the cover 20. Cover 20
The fixing ring 23 and the fixing ring 23 are screwed to each other with a screw 34, and the dome 21 is rotatable with respect to the cover 20.

Ribs 10d are provided at several places (for example, four places) on the inner surface of the upper part of the cylindrical case 10, and protruding ribs 21a are provided at several places (for example, four places) on the flange portion of the dome 21.
Is provided. These rib 10d and rib 21a
By rotating the dome 21, they mesh with each other,
The cover 20 is fixed to the cylindrical case 10 together with the dome 21.
That is, when the dome 21 is rotated to move the rib 21a of the dome 21 to the rib 10d of the cylindrical case 10, the cover 20 is integrated with the main body in a locked state. When the rib 21a and the rib 10d separate, the locked state is released and the dome
It is possible to remove the cover 20 together with 21 from the main body.

The dome 21 is made of a milky white light transmissive resin (eg, acrylic styrene resin). Ultraviolet rays leaking from the opening of the lamp case 16 above the ultraviolet lamp 15 are applied to the dome 21 provided above the ultraviolet lamp 15 to
21 functions as a light emitting body and emits light.

A limit switch 22 is fixed to the inner surface of the upper portion of the air guide case 18. The limit switch 22 is provided in order to turn off the power so that the cover 20 is not exposed to dangers such as high voltage and ultraviolet rays when the cover 20 is removed. If the cover 20 is installed,
The limit switch 22 is turned on by the pin 23a of the fixing ring 23 fixed to 20. When the cover 20 is removed, the limit switch 22 is turned off and the power is turned off.

Next, the operation will be described. FIG. 7: is a figure which shows the flow of the air in the Example of this invention. First, the flow of air will be described. Due to the rotation of the blower fan 24, the air flowing in from the cover 20 passes through the dust collecting paper 13, the dust collecting electrode 11, the cylindrical case 10, and the gap between the cylindrical case 10 and the air guide case 18. After rising the lamp case 16
Pass through the upper opening, near the UV lamp 15,
It passes through the photocatalyst 17 and the ozone catalyst 19, and is discharged from the opening 40 between the lower case 1 and the upper case 9. When the blower fan 24 provided below the upper case 9 (ozone catalyst 19) is driven, the dust particles of the contaminated air outside are removed by the dust collecting paper 13, and the air containing the malodorous component enters the lamp case 16. Due to the photocatalyst 17 that is taken in and excited by the irradiation of ultraviolet rays and the ozone generated by the ultraviolet lamp 15, the air becomes an odorless substance due to an oxidation reaction and is exhausted to the outside.

The details of the dust collecting process in the dust collecting section and the deodorizing process in the deodorizing section will be described below. control panel
When the power supply circuit 4 is turned on at 31, the ionization electrode
A voltage of, for example, 7 kV with 12 on the negative side is applied between the dust collecting electrode 11 and the ionizing electrode 12, and the ionizing electrode 12 moves to the dust collecting electrode.
A line of electric force toward 11 is generated. Since the ionization electrode 12 has a thin plate-shaped discharge electrode 12a, it easily initiates a corona discharge to generate an ionic wind by the discharge, and when dust particles come into contact with gas ions and electrons generated by the discharge, the dust is generated. The particles are negatively charged. The negatively charged dust particles move toward the dust collecting electrode 11 having a high electric potential. Dust collecting electrode 11
Since the dust collecting paper 13 is wound around the, the dust particles adhere to the dust collecting paper 13.

Of course, it is possible to perform the dust collecting process only with the ion wind without rotating the blower fan 24. However,
Since only a small amount of air is sucked in by the ionic wind, it is considered that sufficient dust removal performance cannot be exhibited when the air is considerably dirty or when it is installed in a large room. Therefore, in such a case, the blower fan 24
The external air is forced to be sucked into the dust collecting portion by rotating the. By doing so, the amount of air sucked in is increased and the amount of dust adsorbed is significantly improved, as compared with the case of using only ionic wind.

When the amount of dust attached to the dust collecting paper 13 increases and the dust removing function deteriorates, the dust collecting paper 13
Remove the claw 14b of the pressing lever 14 for fixing the sack from the cylindrical case 10 to unlock the dust collecting paper 13, replace the dirty dust collecting paper 13 with a new dust collecting paper 13, and replace the new dust collecting paper 13 with the dust collecting electrode 11.
Wrap around. Such a replacement process of the dust collecting paper 13 in the present embodiment can be extremely easily performed by using the pressing lever 14.

Next, the deodorizing process in the deodorizing section will be described. When the ultraviolet lamp 15 is energized, it emits ultraviolet rays and produces ozone. The emitted ultraviolet rays are efficiently applied to the photocatalyst 17 by the reflecting member 26. Photocatalyst 17
Electrons of the semiconductor of the metal oxide forming the element obtain energy by ultraviolet irradiation, active species such as highly active O radicals and OH radicals are generated, and these active species oxidize malodorous substances. In addition, the generated strong ozone also promotes the oxidation reaction of the malodorous substances. The air that has been dedusted in the dust collecting portion and contains the malodorous component is sucked into the lamp case 16, and is oxidized by the activated species from the photocatalyst 17 that has been excited and the ozone from the ultraviolet lamp 15 to become an odorless substance. Exhausted to the outside. Specifically, various malodorous substances are finally decomposed into odorless substances such as water vapor, carbon dioxide, and nitrogen.

By the way, ozone has its own odor. However, the remaining excess ozone is neutralized and decomposed by passing through the ozone catalyst 19, which is safe.
Further, the ozone catalyst 19 itself also contributes to the promotion of the oxidation reaction of the malodorous substance.

When the ultraviolet lamp 15 is turned on to perform the deodorizing process, the ultraviolet rays from the ultraviolet lamp 15 leak from the opening in the upper part of the lamp case 16 and are made of synthetic resin.
21 is illuminated and the dome 21 emits light. Therefore, this dome 21 serves as a light emitting portion without providing a new light source. The reflecting member 26 for collecting light on the photocatalyst 17 is a lamp case.
Since it is formed so as to reach the opening at the upper part of 16, the light from the ultraviolet lamp 15 is efficiently applied to the dome 21. Further, since the dome 21 emits light during the deodorizing process, the user can judge at a glance whether or not the deodorizing process is being performed.

As described above, in this embodiment, since the electrostatic dust collecting portion and the deodorizing portion composed of a dual system of light deodorizing and ozone deodorizing are provided, the dust removing / deodorizing system is extremely effective. Become.

Here, a combination of the dust collecting process in the dust collecting part, the deodorizing process in the deodorizing part, and the driving of the blower fan 24 will be described. The dust collecting process in the dust collecting portion can be controlled to be turned on and off depending on whether or not a voltage is applied between the dust collecting electrode 11 and the ionization electrode 12. Further, the deodorizing process in the deodorizing unit can be controlled to be turned on and off by switching on and off of the ultraviolet lamp 15. Further, the drive of the blower fan 24 can be controlled to be turned on or off depending on whether or not the motor 2 is energized.

For example, switching on / off of the blower fan 24 and switching on / off of the ultraviolet lamp 15 are synchronized with each other, the dust collecting function is mainly operated when the blower fan 24 is off, and the dust collector is on when the blower fan 24 is on. Operates both the noh and deodorant functions. That is, when the blower fan 24 is off, low-power consumption, noise-free electrostatic dust collection is performed, and when the blower fan 24 is on, highly efficient dust collection is performed with a wind far stronger than the ion wind. Also performs strong deodorizing treatment.

Unlike the above example, the on / off of the blower fan 24 and the turning on / off of the ultraviolet lamp 15 are controlled independently of each other, and the ultraviolet lamp 15 is intermittently turned on while the blower fan 24 is stopped. It is also possible to turn on the light to accelerate the oxidation reaction of the dust particles adsorbed on the photocatalyst 17 to clean the surface of the photocatalyst 17.

As described above, by combining the operation / non-operation of the dust collecting section, the operation / non-operation of the deodorizing section, and the turning on / off of the blower fan 24, the dust collecting ability and the deodorizing ability can be adjusted according to the external situation during use. Can be controlled appropriately, and it is possible to consider the viewpoints of energy saving and noise.

In the above-described embodiment, the double deodorizing mechanism of light deodorizing and ozone deodorizing is provided as the deodorizing portion, but a cylindrical deodorizing portion using activated carbon is provided inside the cylindrical case 10. You may do it.

In the above-mentioned embodiment, the case where the dust collecting electrode 11 is provided is the cylindrical case 10. However, this case may be a cylindrical case because it has a deodorizing portion inside, and a rectangular tube shape. Other shapes such as a hexagonal tube shape may be used. Further, the air guide case 18 and the lamp case 16 are not limited to the rectangular tube shape, but may be tubes of other shapes.

[0042]

As described above, in the electrostatic air purifying apparatus of the present invention, since the deodorizing section for performing the deodorizing process is additionally provided, it is possible to perform the deodorizing process simultaneously with the dust removing process. It is possible to purify the air.

Further, since the blower fan forcibly sucking the outside air into the inside is provided, the processing capacity can be enhanced. Furthermore, when the blower fan is on, it collects dust and deodorizes, and when it is off, it mainly collects dust, so not only can each processing capacity be controlled according to the purpose at that time, but energy saving, quietness, etc. Can be adapted to a wide range of purposes.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of an electrostatic air cleaning device of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the electrostatic air cleaning device of the present invention.

FIG. 3 is a cross-sectional view showing the internal structure of the lower case of the electrostatic air purifying apparatus of the present invention.

FIG. 4 is a vertical cross-sectional view showing the configuration of the lower case and its vicinity of the electrostatic air purifier of the present invention.

FIG. 5 is a vertical cross-sectional view showing a configuration of a deodorizing unit of the electrostatic air purifying apparatus of the present invention.

FIG. 6 is a vertical cross-sectional view showing the configuration of the electrostatic air purifying device of the present invention excluding the deodorizing portion, the cover and the dome.

FIG. 7 is a vertical cross-sectional view showing the flow of air in the electrostatic air cleaning device of the present invention.

[Explanation of symbols]

 1 Lower Case 2 Motor 3 Board 4 Power Supply Circuit 9 Upper Case 10 Cylindrical Case 11 Dust Collection Electrode 12 Ionization Electrode 13 Dust Collection Paper 14 Holding Lever 15 UV Lamp 16 Lamp Case 17 Photocatalyst 18 Air Guide Case 19 Ozone Catalyst 20 Cover 21 Dome 22 Limit Switch 23 Fixing ring 24 Blower fan 31 Operation panel

Claims (4)

[Claims] 1. An electrostatic air cleaning device comprising a cylindrical dust collecting electrode and an ionizing electrode provided outside the dust collecting electrode, wherein a deodorizing device is provided inside the dust collecting electrode. And electrostatic air purifier. 2. The electrostatic air purifier according to claim 1, wherein the deodorizing device has a photodeodorizing mechanism using a photocatalyst and an ozone deodorizing mechanism using an ozone catalyst. 3. The electrostatic air purifier according to claim 1, further comprising a blower fan for forcibly sucking the outside air into the inside. 4. A control means for controlling the operation and non-operation of the blower fan so as to collect dust and deodorize when the blower fan operates and mainly collect dust when the blower fan does not operate. The electrostatic air cleaning device according to claim 3, wherein