JPH09141131A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the charge of a dust collection part when the dust collection part is taken out. SOLUTION: The first contact 55 connected to a float electrode and the second contact 75 connected to the electrode on the low voltage side of a dust collection part 21 are provided to be arranged in the attaching direction R of a deodorizing filter 103. The deodorizing filter 103 is brought into contact with the second contact 75 and the first contact 55 in this order to short-circuit the first and second contacts 55, 75. By this constitution, even if charge is accumulated between the high voltage electrode and low voltage electrode of the dust collection port 21, accumulated charge can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle or household air cleaner, and more particularly to an electric dust collector type air cleaner for collecting dust by charging dust.

[0002]

2. Description of the Related Art Conventionally, heater and ventilated
An air conditioner type air cleaner has a charging unit (ionizer) that charges dust particles that have entered the upstream side of the air flow path by corona discharge to clean the air. It is known that a dust collecting portion (collector) for collecting particles by electrostatic force (Coulomb attraction) is arranged on the downstream side.

For example, as disclosed in Japanese Unexamined Patent Publication No. 3-270744, an ionizer portion for charging dust and molecules and a dust collecting portion for electrically attracting the charged dust and the like to make dust. In the ionizer section, the dust and the like passing therethrough are positively ionized by the electric discharge, and the negative electrode arranged on the downstream side attracts the positively ionized dust by an electric Coulomb attractive force. To capture.

In such an air purifier, ions generated in the ionizer section and charged dust move to the dust collecting section due to Coulomb's attractive force, so that an ionic wind that causes a flow of air is generated.

[0005]

By the way, in the dust collecting portion of the auto-bias type air cleaner, the plate electrode on the high voltage side and the plate electrode on the low voltage side are arranged so as to face each other. A voltage is applied to the plate electrode by a float electrode, but the dust collecting part acts as a kind of capacitor to charge and the charge is accumulated between the plate electrode on the high voltage side and the plate electrode on the low voltage side. Then, the charging phenomenon is likely to occur.

Therefore, if the worker tries to take out the deodorizing filter from the case during maintenance or the like while the dust collecting portion is still charged, the worker may get an electric shock.

An object of the present invention is to provide an air cleaner capable of removing the electrostatic charge of the dust collecting portion in advance when exposing the inside of the dust collecting portion during maintenance or the like.

[0008]

In order to solve the above-mentioned problems, the invention as set forth in claim 1 has an ionizer section for generating ions and a high voltage for attracting ions or ionized dust by Coulomb attraction. Side electrode and the electrode on the low voltage side are arranged to face each other, and a conductive deodorizing filter detachably provided for removing odorous components from the collected air. In the air cleaner, a first contact that is electrically connected to the high-voltage side electrode of the dust collecting portion, is located on the front side in the removal direction of the deodorizing filter, and is electrically contactable with the deodorizing filter. A second contact point that is connected to the ground potential and that is located on the rear side in the removal direction of the deodorizing filter and that is electrically contactable with the deodorizing filter.

According to the present invention, when the deodorizing filter is removed, the first contact and the second contact make the first contact electrically contact the deodorizing filter, and then the second contact contact the deodorizing filter. At this time, since the deodorizing filter has conductivity, the first contact and the second contact are electrically short-circuited, the high-voltage side electrode of the dust collecting portion connected to the first contact is grounded, and the charged electricity is discharged. Is discharged.

According to a second aspect of the present invention, in the air purifier according to the first aspect, the air purifier is disposed between the ionizer section and the dust collecting section, and the electrode on the high voltage side of the dust collecting section is provided. It is composed of an auto-bias type air purifier equipped with a float electrode in an electrically floating state for applying a voltage to.

According to the present invention, even in the air cleaner of the auto bias type, the charging of the high voltage portion can be removed.

According to a third aspect of the present invention, in the air cleaner according to the first or second aspect, a portion of the deodorizing filter where the first contact and the second contact are in contact is
A conductive member having a low electric resistance is provided and configured.

According to this invention, since the electric resistance between the first contact and the second contact is small due to the conductive member provided in the deodorizing filter, the discharge time can be shortened,
It is possible to further improve safety.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2 show an example of the construction of a domestic air cleaner. The air purifier 1 is configured by disposing a prefilter 100, an electric dust collector 3, a power supply control unit 4, a fan 5, a short-circuit switch 6 and the like inside a case 2.

The case 2 includes a front case member 2a, a rear case member 2b combined with the front case member 2a, and a front panel 2c detachably assembled to the front case member 2a to cover the storage place 7 of the electrostatic precipitator 3. , Composed by.

The front panel 2 is driven by driving the fan 5.
The air sucked from a suction portion (hereinafter, referred to as an air suction slit) 8 provided at a lower portion of c passes through the electric dust collecting portion 3, and thereafter, an air outlet portion (hereinafter, referred to as a blow portion) provided at an upper portion of the front panel 2c. It is designed to be blown out from an air blowing slit) 9.

As shown in FIG. 3, in the case 2 of the air purifier 1, from the upstream side along the flow of air to be purified,
The pre-filter 100, the electric dust collector 3, the main filter 101, and the deodorizing activated carbon filter 103 are sequentially arranged in this order.

As shown in detail in FIG. 4, the electrostatic precipitator 3
Is an ionizer portion 15 having a counter electrode 13 facing the discharge electrode 11, a first collector plate electrode 17 being a high voltage side electrode and a second collector plate electrode 19 being a low voltage side electrode facing each other. The float electrode 23 is interposed between the ionizer portion 15 and the dust collecting portion 21. In addition, the discharge electrode 11 and the counter electrode 13 are connected to each other via the overcurrent breaker 27 and the high voltage power supply 25.
Are connected, for example, 5 to 6 KV (kilovolt)
High voltage is being applied.

The ionizer portion 15 gives an electric charge to dust or particles passing therethrough by corona discharge, and in the embodiment of the present invention, gives a positive electric charge. The discharge electrode 11 is formed by arranging a wire made of a material such as tungsten, and the plurality of discharge electrodes 11 are arranged between the counter electrodes 13.

Each counter electrode 13 is formed in a plate shape and is provided so as to face the above-mentioned discharge electrode 11.

The discharge electrode 11 has electrode mounting pieces 15 provided at both ends of a frame body 14 (see FIG. 3) for assembling the electrostatic precipitator 3.
The spring 16 is a linear member that is attached so as to pass in parallel with each other many times while shifting the positions at predetermined intervals.
It is stretched with a predetermined tension. A terminal 18 (see FIG. 2) protruding from a through hole formed in the assembling frame body 14 is provided at one end of the discharge electrode 11. still,
The assembling frame 14 and the electrode attachment piece 15 are made of an insulating material such as synthetic resin.

In the discharge electrode 11, cations are generated, and the cations are added to the molecules in the air passing therethrough to be ionized, or dust or the like is ionized. At this time, the discharge electrode 11 ionizes oxygen in the air to generate ozone.

Although not shown in FIG. 3, the counter electrode 13 has a structure in which a large number of conductor plates are fixed in parallel at predetermined intervals to the connecting pieces provided on both edges and electrically connected. Has become.

In the dust collecting portion 21, a first collector plate electrode 17 which is an electrode on the high voltage side and a second collector plate electrode 19 which is an electrode on the low voltage side are alternately arranged facing each other with a predetermined interval. Has been done. In the dust collecting part 21, charged dust, particles, and the like are absorbed by Coulomb's attractive force and collected to clean the air.

Each second collector plate electrode 19 is grounded, a float electrode 23 is connected to the first collector plate electrode 17, and a predetermined voltage is applied through this float electrode 23.

The float electrode 23 is the ionizer portion 15
It is arranged between the dust collecting part 21 and the dust collecting part 21, and is formed in a plate shape that constitutes a mesh.

The main filter 101 and the activated carbon filter 103 are arranged on the downstream side of the ionizer section 15.

The main filter 101 is permanently charged,
The main filter 101 adsorbs dust such as dust in the air and dust charged by corona discharge in the ionizer portion 15 by Coulomb attraction. The deodorizing activated carbon filter 103 is arranged further downstream, and the ionizer unit 1
Adsorbs odorous components such as ozone (O ³ ) generated in 5 and cigarettes. The activated carbon filter 103 has an action of reducing and decomposing ozone passing therethrough by the reducing action of activated carbon. The activated carbon filter 103 has conductivity, but has a relatively high electric resistance value.

The first contact 55 on the high voltage side of the dust collector 21 is connected to the float electrode 23 of the dust collector 21 of FIGS. 4 and 5, and each second collector plate electrode 19 of the dust collector 21 is connected to the float electrode 23. The second contact 75 is connected. The first contact 55 and the second contact 75 are arranged with a predetermined gap L, and the gap L is, for example, 20 mm. The reason why the predetermined interval L is required is that the activated carbon filter 1 is used as shown in FIG.
In the state where 03 is accommodated, the first contact 55 and the second contact 75 on the low voltage side are discharged in the normally open state (normally open state) from the first contact 55 to the second contact 75. This is to prevent

On the other hand, the activated carbon filter 103 has a substantially quadrilateral shape as shown by the diagonal lines which are slightly smaller than the dust collecting portion 21, but the first contact 55 and the second contact 75 on the low voltage side.
The cutout portion 103a is provided to avoid the above. Therefore, in the state where the activated carbon filter 103 is housed, the conductive activated carbon filter 103 is separated from the first contact 55 and the second contact 75. When the activated carbon filter 103 shown in FIG. 5 is housed, the activated carbon filter 103 shown in FIG.
Reference numeral 03 electrically contacts the second contact 75 and the first contact 55 in this order.

As described above, the first contact 55 is located farther from the portion 103b of the activated carbon filter 103 than the second contact 75 is because the activated carbon filter 103 can be electrically contacted with the second contact 75 first. This is to prevent the high voltage from being transmitted to the activated carbon filter 103 first.

A fan 5 is arranged on the downstream side of the activated carbon filter 103 in the air blowing direction. The fan 5 allows the air that has passed through the ionizer section 15, the electric dust collecting section 3 and the activated carbon filter 103 to be blown out from the air blowing slit 9. It is designed to blow out. The fan 5 is connected to the control device 31 as shown in FIG.
Drive, stop, and blowing output are controlled based on the drive signal from the.

In the embodiment of the present invention, the blower output of the fan 5 is configured to be controllable in three stages of strong, medium, and weak, and is driven in these three stages based on a signal from the control device. .

The gas sensor 3 is provided near the air outlet slit 9 of the air cleaner or outside the case 2 (or in the room).
3 is provided to detect the dust concentration in the air. The gas sensor 33 is used in the control device 31.
It is connected to and detects the concentration of dust (dirt in the air). In the embodiment of the present invention, the gas sensor 33 detects dirt in the air in four stages,
The controller 31 controls the fan 5 in response to the output of the gas sensor 33.

Next, the operation of the present embodiment will be described.

In the air purifier 1, the ionizer section 15
At this point, the cations generated here ionize the dust in the air, and the ionized dust is collected and removed in the electric dust collector 3 by the electric Coulomb attraction. Therefore, between the ionizer unit 15 and the electric dust collector 3,
A flow of ions is created which creates an ionic wind that moves the entire air around it.

By forcibly passing this ionic wind through the activated carbon filter 103, ozone blown together with the ionic wind is reduced by the activated carbon and decomposed. Therefore, the activated carbon filter 103 can surely reduce the ozone concentration.

By the way, when the operator takes out the activated carbon filter 103 from the inside of the case 2 at the time of maintenance or the like, the activated carbon filter 103 is taken out along the taking-out direction R as shown in FIG. 6 from the housed state of the activated carbon filter 103. As a result, the portion 103 of the activated carbon filter 103
Since b is electrically contacted in order of the second contact 75 and the first contact 55, the electrostatic charge of the dust collecting part 21 can be short-circuited and removed, and an electric shock when an operator touches the dust collecting part 21 is activated carbon. This can be prevented when the filter 103 is attached or detached.

As described above, in the embodiment of the present invention, the activated carbon filter 103 is used to remove the charge on the dust collecting portion 21.
Since the desorption is used, no special charge removing circuit or charge removing mechanism is required.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the activated carbon filter is used as the conductive deodorizing filter, but the present invention is not limited to this, and other types of filters may be used.

Further, in the embodiment shown in FIG. 8, a conductor 160 such as a metal foil having excellent conductivity and having a small resistance value is provided on the portion 103b of the deodorizing filter 103 in order to speed up charge removal. Can be placed at. This conductor 1
60 is, for example, Cu or Al. This conductor 160
Comes into contact with the first contact 55 and the second contact 75 when the deodorizing filter 103 is taken out, thereby causing a short circuit. Further, as shown by the broken line in FIG. 8, the second contact 75 may be arranged at a position corresponding to the portion 103b of the filter 103.

Further, the air purifier of the present invention is not limited to household use, but can be applied to vehicles, for example.

[0044]

According to the invention described in claim 1, when the worker takes out the deodorizing filter, electric charges are accumulated between the high voltage side electrode and the low voltage side electrode of the dust collecting portion. Also, the first contact and the second contact can be short-circuited simply by taking out the deodorizing filter, and the deodorizing filter can be taken out to automatically remove the electrostatic charge in the dust collecting portion.

According to the second aspect of the invention, it is possible to prevent electric shock of a high voltage when the deodorizing filter is taken out even in the air cleaner of the auto bias type.

According to the third aspect of the present invention, the conductor having a low electric resistance value can take out the deodorizing filter and discharge the first contact and the second contact more quickly than in the case where only the deodorizing filter is used. it can.

[Brief description of the drawings]

FIG. 1 is a view showing a main internal structure of a domestic air cleaner according to the present invention as viewed from the front.

FIG. 2 is a diagram showing a main internal structure of the domestic air cleaner shown in FIG. 1 when viewed from the side.

FIG. 3 is an exploded perspective view showing an electrostatic precipitator.

FIG. 4 is a schematic diagram showing a configuration of an air cleaner of the present invention.

FIG. 5 is a side view showing a dust collecting unit and a deodorizing filter of the present invention.

FIG. 6 is a diagram showing a state in which a deodorizing filter is about to be taken out from the dust collecting unit of FIG. 5;

FIG. 7 is a plan view showing a dust collecting unit and a deodorizing filter of the present invention.

FIG. 8 is a side view showing another dust collecting portion and a deodorizing filter of the present invention.

[Explanation of symbols]

 3 Dust Collection Part 15 Ionizer Part 17 First Plate Electrode on High Voltage Side 19 Second Plate Electrode on Low Voltage Side 23 Float Electrode 55 First Contact Point 75 Second Contact Point 103 Deodorizing Filter 103a Conductor

Claims (3)

[Claims] 1. An ionizer section for generating ions, a dust collecting section in which an electrode on the high voltage side and an electrode on the low voltage side are arranged to face each other in order to attract ions or ionized dust by Coulomb attractive force, In an air purifier having a conductive deodorizing filter detachably provided to remove odorous components from the collected air, electrically connected to the high-voltage side electrode of the dust collecting part, A first contact, which is located on the front side in the removal direction of the deodorization filter and is provided so as to be able to electrically contact the deodorization filter, is connected to the ground potential and is located on the rear side in the removal direction of the deodorization filter. An air purifier, comprising: a second contact provided so as to be electrically contactable with the filter. 2. The air purifier according to claim 1,
The air purifier is an auto-bias type air purifier equipped with an electrically floating float electrode that is arranged between the ionizer and the dust collector and applies a voltage to the electrode on the high voltage side of the dust collector. An air purifier characterized by being. 3. The air cleaner according to claim 1 or 2, wherein a conductive member having a small electric resistance is provided at a portion of the deodorizing filter where the first contact and the second contact are in contact with each other. A characteristic air purifier.