JPH07299384A - Home air cleaning device - Google Patents

Abstract

PURPOSE:To provide a home air cleaning device which can shorter a high voltage-resistant cable connected to a power supply and a high voltage-resistant cable connected to a shortcircuit switch. CONSTITUTION:An electric dust collector 3 of a so-called autobias type which can produce a potential difference between both poles of a collector 11 by applying voltage only to an ionizer 10 is housed in a case in a freely detachable manner. In addition, a shortcircuit switch 6 which turns ON/OFF the connection between a terminal 33 leading to a float electrode 30 and a terminal 44 on a grounding side is provided in the case. This shortcircuit switch is set OFF, if a panel 2c which covers a storage spot for the electric dust collector 3 is arranged, and is set ON, if the panel 2c is removed. Thus, it is possible to shorten the distance between a power supply 41 and a terminal to be connected to the former and that between the float electrode 30 and the shortcircuit switch 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning air, which is used for household use.

[0002]

2. Description of the Related Art In order to clean air, a charging section (ionizer) for charging dust particles is arranged on the upstream side of an air flow path, and a dust collecting section (collector) for collecting the charged dust particles is arranged downstream. Those arranged on the side are known. For example, in FIG. 3 of Japanese Patent Application Laid-Open No. 62-53751, the charging portion is composed of a discharge electrode and a counter electrode facing the charge electrode, and the positive electrode side of the DC power source is the discharge electrode and the negative electrode side is the counter electrode. The positive dust collecting electrode and the negative dust collecting electrode are alternately opposed to each other in a plurality of stages to form a dust collecting unit. The positive dust collecting unit is connected to the positive electrode of the DC power source, and the negative dust collecting unit is connected. It is disclosed that the negative electrode is connected to.

[0003]

When such an electric dust collector is housed in a case and used as an air purifying device for home use, a panel (usually the front surface) for covering the attachment / detachment portion of the dust collector is used for maintenance of the dust collector. When the front panel of the collector is opened, a short-circuit switch that short-circuits the collector and discharges the charged electric charge is required. The short-circuit switch is arranged between the terminal connected to the terminal and the terminal on the ground side.

However, since the voltage applied to the dust collecting portion is as high as several KV, it is difficult to circulate it inside the case, and a short-circuit switch must be provided as close to the electrode as possible. As shown in FIG. 5A, the collector A has a negative dust collecting electrode B (ground side electrode) connected to one of two opposing sides and a positive dust collecting electrode C (anti-ground side electrode) on the other side. Since the configuration is connected, FIG.
As shown in (b), the terminal D of the positive dust collecting electrode C, which is connected to the high-voltage DC power supply E and the short-circuit switch F, can be taken out only from one direction (one side surface) of the collector A, and therefore the space is limited. If the short-circuit switch F has to be provided above the air purifier due to the above circumstances, the high voltage resistant wire G must be routed to that position, which is very dangerous.

Further, it is desirable that the high voltage resistant wires H and I connected to the high voltage DC power source E are also made as short as possible. However, in the above-mentioned electrostatic precipitator, since it is necessary to connect both the ionizer J and the collector A, it is possible to When the DC power sources E are collectively arranged, for example, near the electrode K on the ionizer side, it is expected that a high voltage resistant wire must be routed to the electrode on the collector side.

Therefore, in the present invention, the high-voltage resistant wire connected to the power supply can be shortened, and the high-voltage resistant wire connected to the short-circuit switch can be shortened regardless of the installation location of the short-circuit switch. The challenge is to provide.

[0007]

The applicant has studied various countermeasures against the above inconvenience caused by having to separately connect an ionizer and a collector to a power supply, and as a result, applies a voltage only to the ionizer. By using a so-called auto-bias type electrostatic precipitator capable of forming a potential difference between both electrodes of the collector, it is possible to cope with various layouts by improving the connection between the electrostatic precipitator and a short-circuit switch or a power source. The invention was completed.

That is, the domestic air purifying apparatus according to the present invention has an ionizer for charging dust particles, a grounding side electrode arranged on the downstream side of the ionizer, and an anti-grounding side electrode facing the ionization side electrode. An electrostatic precipitator having a configured collector and a float electrode arranged between the ionizer and the collector and connected to an electrode on the anti-ground side of the collector is detachably mounted in a case, and the ionizer is attached to the case. A power supply for applying a voltage to the terminal, and a short-circuit switch for turning on / off the connection between the terminal connected to the float electrode and the terminal on the ground side. The short-circuit switch is provided with a panel covering the storage location of the electrostatic precipitator. When the panel is removed, it is turned off, and when the panel is removed, it is turned on (claim 1).

Here, the short-circuit switch has a switch lever which is rotatably provided, and the switch lever is
A first piece extending from the center of rotation; and a second piece extending on the opposite side of the first piece with respect to the center of rotation,
One of the terminal connected to the float electrode or the ground side terminal is electrically connected to the switch lever, and the first piece has an urging force in a direction of contacting the other of the terminal connected to the float electrode or the ground side terminal. In addition, when the panel is mounted at a position covering the storage area of the electrostatic precipitator, the protrusion provided on the panel is pressed against the second piece and the switch lever is rotated against the biasing force. It may be one (Claim 2).

[0010]

Therefore, according to the present invention, when a voltage is applied to the ionizer, an ion current is supplied from the ionizer to the float electrode, and the bias voltage is automatically applied to the anti-ground side electrode of the collector connected to the float electrode. Occurs, and a potential difference occurs between the ground electrode and the ground side electrode. Therefore, the dust particles charged by the ionizer are adsorbed on the electrode surface of the collector when passing through the collector, and the air is cleaned.

In the case of the auto-bias type electrostatic precipitator as described above, since the power source only needs to be connected to the ionizer, the ionizer terminals are provided in the vicinity of the power source or the space for disposing the power source in the vicinity of the ionizer terminals. By ensuring the above, it is possible to shorten the distance between the power source and the terminal connected to the power source. Also, no matter where the installation location of the short-circuit switch is changed due to space restrictions, the terminals on the float electrode side can be taken out from any location on the peripheral edge of the float electrode, so the distance between the terminals on the float electrode side and the short-circuit switch can also be increased. Can be shortened.

Further, when the panel is mounted at a position covering the storage area of the electrostatic precipitator, the short-circuit switch is turned off to allow a potential difference to be formed between the ground side electrode and the anti-ground side electrode, but the panel is removed. The short-circuit switch
It becomes N, and the electric charge of the anti-ground side electrode that has been charged up to now is released through the short-circuit switch. Therefore, there is no risk of being charged when the electrostatic precipitator is taken out.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2, a domestic air purifying apparatus according to the present invention is shown.
An electric dust collector 3, a power supply control unit 4, a fan 5, a short-circuit switch 6 and the like are arranged inside the 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 case member 2a. Front panel 2 that is detachably assembled to cover the storage location 7 of the electrostatic precipitator 3.
The air sucked from the air suction slit 8 provided by the rotation of the fan 5 and provided in the lower portion of the front panel 2c is purified when passing through the electrostatic precipitator 3, and then the upper portion of the front panel 2c. The air is blown out from the air blowing slit 9 provided.

As shown in FIGS. 3 and 4, the electrostatic precipitator 3 has an ionizer (charging section) 10 and a collector (dust collecting section) 11. The discharge electrode 12 is connected to the positive electrode side of a 6 KV power source), and the discharge counter electrodes 13 are alternately arranged in a plurality of stages so as to face the discharge electrode 12.

The discharge electrode 12 is a line attached so as to pass in parallel between the electrode attachment pieces 15 provided at both ends of the assembling frame body 14 of the electrostatic precipitator 3 at predetermined intervals and in parallel. Shaped springs 16 at both ends
It is stretched with a predetermined tension. A terminal 18 protruding from a through hole 17 formed in the assembling frame body 14 is provided at one end of the discharge electrode 12. here,
The assembling frame 14 and the electrode attachment piece 15 are made of an insulating material such as synthetic resin.

Further, the discharge counter electrode 13 has a structure in which a large number of conductor plates are fixed in parallel to the connecting pieces 20 provided on both edges at predetermined intervals and electrically connected to each other. 1
4, the conductor plates 13 are positioned in the notches 21 formed in the electrode attachment piece 15, inserted between the discharge electrodes 12, and the terminals 22 provided in the connection piece 20.
Is fitted into the through hole 23 formed on the side surface of the assembling frame body 14, so that a part of the terminal projects from the side surface of the assembling frame body 14.

The collector 11 is arranged on the downstream side of the ionizer 10 and has a frame 24 formed to have a size that can be inserted into the assembly frame 14 of the electrostatic precipitator 3 and has a ground side electrode 25 and an anti-ground side electrode 26. And are alternately arranged in a plurality of stages. The collector 11 is connected to the discharge counter electrode 13 by a terminal 27 provided on one side surface of the frame body 24 so as to be electrically connected to the ground side electrode 25 in a state of being assembled to the assembly frame body 14. The ground side electrode 25 and the discharge counter electrode 13 of the ionizer 10 are brought into equipotential by contacting the terminal 28 provided on the piece 20.

Then, the ionizer 10 and the collector 11
A float electrode 30 arranged in a state of being floated from the power supply and the ground is arranged between and. The float electrode 30 is, for example, a frame body 14 for assembly of the electrostatic precipitator 3.
A wire mesh 32 is attached to a frame body 31 formed into a size that can be inserted into the inside.
When it is inserted together with the collector 11 into the assembling frame body 14, it is fixed to the ionizer 10 at a predetermined interval, and
The terminals 37 provided on the frame body 31 come into contact with the terminals 34 provided on the frame body 24 of the collector 11, and in this state, the terminals 33 also provided on the frame body 31 are formed on the assembly frame body 14. It projects from the through hole 35. Here, the terminal 34 is provided on the side surface of the frame body 24 of the collector 11 opposite to the side surface on which the terminal 27 is provided, and is electrically connected to the anti-ground side electrode 26.

The terminal 18 projecting from the through hole 17 is provided on one side surface upper part of the assembly frame body 14, and the terminal 22 projecting from the through hole 23 is located on the same side surface lower part of the assembly frame body 14. The terminal 33, which is provided and projects from the through hole 35, is provided near the side surface on the opposite side of the upper surface of the assembling frame body 14 on the side where the through holes 17 and 23 are provided.

The electrostatic precipitator 3 having the above-mentioned structure is arranged in the housing 2 in the case 2 of the air purifying apparatus 1 and is arranged in the lower left when viewed from the front (see FIG. 1).
The power supply control unit 4 and the short-circuit switch 6 via the partition wall 36.
Connected to.

As shown in FIG. 4, the power supply control unit 4 receives a signal from a control panel (not shown) provided in the case 2 of the air cleaning device 1 when the power of AC100V supplied from the outlet of the building is input. Control circuit 4 for driving and controlling the electrostatic precipitator 3 and the fan 5 based on
0 and a DC high-voltage power supply 41 which is connected to the control circuit 40 and forms a DC voltage to be supplied to the ionizer 10, and when the air cleaning device 1 is stored in the storage location 7,
The terminal 18 connected to the discharge electrode 12 contacts a fixed terminal 45 provided on the partition wall 36, and a terminal 42 connected to the positive electrode side of the DC high voltage power supply 41 via a high voltage resistant wire 46 connected to the fixed terminal 45. Connected. The terminal 22 connected to the discharge counter electrode 13 is the fixed terminal 4 provided on the partition wall 36.
Normal wiring 4 that contacts 7 and is connected to this fixed terminal 47
8 is connected to a terminal 43 communicating with the negative electrode (GND) side of the DC high-voltage power supply 41. Further, the third terminal 33 connected to the float electrode 30 contacts the fixed terminal 49 provided on the partition wall 36, and is connected to the short-circuit switch 6 via the high voltage resistant wire 50 connected to the fixed terminal 49. However, the short-circuit switch 6 is normally connected via the wiring 51 to the control circuit 40.
Is connected to the terminal 44 on the GND side. Here, the GND side of the DC high-voltage power supply 41 and the GND side of the control circuit 40 are electrically connected.

The short-circuit switch 6 is rotatably supported by a switch lever 61 in a switch case 60. The switch lever 61 is made of a conductor that is electrically connected to a GND-side terminal 44 of a control circuit 40, and rotates. It has a first piece 62 extending from the center O and a second piece 63 extending on the opposite side of the rotation center O from the first piece 62. Further, the switch case 60 is provided with a terminal 64 to which the high voltage resistant wire 50 connected to the fixed terminal 49 is attached by a screw or the like, and the first piece 62 can come into contact with the terminal 64. An elastic member 65 such as a spring or rubber attached between the switch case 60 and the switch case 60 always applies a biasing force to the terminal 64 side.

The second piece 63 has an abutting portion 66 formed at the end thereof for receiving the projection 70 provided on the front panel 2c, and is attached so that the front panel 2c covers the storage location 7 of the electrostatic precipitator 3. In this case, the protrusion 70 is inserted through the hole provided in the switch case 2 and the contact portion 66
The switch lever 61 is rotated against the biasing force of the elastic member 65.

In the above structure, when the front panel 2c is attached, the protrusion 70 has the second piece 63.
The switch lever 61 is pressed against the contact portion 66 of the switch lever 61 and is rotated against the urging force of the elastic member 65.
The piece 62 and the terminal 64 are in the OFF state in which they are separated from each other. When the fan 5 is driven by the control circuit 40 in this state and a high voltage is applied to the ionizer 10 of the electrostatic precipitator 3, the discharge electrode 12 discharges the discharge counter electrode 13, while the discharge electrode 12 floats the float electrode 30. Is supplied with an ion current, a bias voltage is automatically generated at the anti-ground side electrode 26 of the collector 11 connected to the float electrode 30, and a potential difference (about 2 KV) from the ground side electrode 25 is generated.
Occurs. Therefore, dust in the air sucked from the air suction slit 8 is positively charged when passing through the ionizer 10, and is adsorbed on the surface of the ground electrode 25 when passing through the collector 11.

For example, even if the application of voltage to the ionizer 10 is stopped due to the need for maintenance, the float electrode 30
The anti-ground side electrode 26 of the collector 11 and the collector 11 are continuously charged, but when the front panel 2c is removed, the protrusion 70 separates from the contact portion 66 of the second piece 63, so that the switch lever 61 is rotated by the elastic member 65 to be in an ON state where the first piece 62 and the terminal 64 are in contact with each other. Therefore, the float electrode 30 and the anti-ground electrode 26
The electric charge that has been charged to is discharged to the GND terminal of the control circuit 40 via the short-circuiting switch 6 and becomes an uncharged state. Therefore, when removing the electrostatic precipitator 3, there is no electric shock and safe maintenance can be realized.

In particular, when the electric bias dust collector 3 of the auto bias type is used as described above, only one high-voltage resistant wire 46 connecting from the power supply control unit 4 to the discharge electrode 12 is required. DC high voltage power supply 41 near the terminals
By arranging, the high-voltage resistant wire 46 can be made as short as possible, and it is not necessary to draw it inside the case. Further, since the terminal 33 formed on the float electrode 30 can be formed on any part of the peripheral edge of the float electrode, the terminal 33 is provided in the vicinity of the short-circuit switch 6 and the terminal 49 corresponding to the terminal 33 is provided. Changing the position is easy.
Therefore, even if the installation location of the short-circuit switch 6 is changed due to space limitations or design changes, the terminals 33 and 49 can be provided in the vicinity thereof regardless of space restrictions. That is, it becomes possible to deal with any arrangement of the short-circuit switch by simply changing the positions of the terminals 33 and 49 and the position of the through hole 35 of the assembly frame body 14, and between the terminals 49 and the short-circuit switch 6. High voltage resistant wire 5
0 can be as short as possible.

[0028]

As described above, according to the present invention,
Since the voltage is applied only to the ionizer and the short-circuit switch is connected to the terminal that communicates with the float electrode, if the power supply is installed near the terminal of the ionizer, the high voltage resistant line connecting the power supply and the ionizer should be shortened. You can

The terminals provided on the float electrode are
Since it can be provided at any position on the periphery of the float electrode, the terminal can be installed in the vicinity of the position of the short-circuit switch and the high-voltage resistant line between the short-circuit switch and the collector can be shortened. . In other words, it is not necessary to secure a space for the short-circuit switch in the vicinity of the terminal, and it is possible to freely lay out the short-circuit switch in an open space and set the position of the terminal accordingly. It can be miniaturized.

Furthermore, by attaching / detaching the panel, the short-circuit switch can be turned on / off to release the electric charge charged in the collector when the panel is removed, so that there is no risk of electric shock when the dust collector is removed.

[Brief description of drawings]

FIG. 1 is a diagram showing a main internal structure of a domestic air purifying apparatus according to the present invention when viewed from the front.

FIG. 2 is a cross-sectional view showing a main internal structure of the domestic air cleaning apparatus shown in FIG. 1 when viewed from a side.

FIG. 3 is an exploded perspective view showing an electrostatic precipitator used in the household air cleaning device shown in FIG. 1.

FIG. 4 is a diagram showing a structure of a short-circuit switch used in the household air cleaning device shown in FIG. 1 and a circuit configuration diagram of the air cleaning device.

FIG. 5 (a) shows a collector used in a conventional air cleaning device, and FIG. 5 (b) is a diagram showing a circuit configuration diagram of the air cleaning device when the collector is used. .

[Explanation of symbols]

 1 Home Air Purifier 2 Case 2c Front Panel 3 Electric Dust Collector 4 Power Control Unit 6 Short-Circuit Switch 7 Storage Location 10 Ionizer 11 Collector 12 Discharge Electrode 13 Discharge Counter Electrode 18, 22, 27, 28, 33, 34, 37 Terminal 44, 45, 47, 49, 64 Terminal 25 Grounding side electrode 26 Anti-grounding side electrode 30 Float electrode 40 Control circuit 41 DC high voltage power supply 61 Switch lever 62 First piece 63 Second piece 70 Protrusion

Claims (2)

[Claims] 1. An ionizer for charging dust particles,
A collector arranged downstream of the ionizer and having a ground side electrode and an anti-ground side electrode facing the ground side electrode, and an anti-ground side electrode of the collector arranged between the ionizer and the collector. An electrostatic precipitator equipped with a float electrode to be connected to is detachably mounted in a case, and a connection between a power source for applying a voltage to the ionizer to the case and a terminal connected to the float electrode and a ground side terminal is turned on. And a short-circuit switch for turning off / off, and the short-circuit switch is turned off when a panel covering a storage location of the electrostatic precipitator is attached, and is turned on when the panel is removed. Air purifier. 2. The short-circuit switch has a switch lever rotatably provided, and the switch lever has a first piece extending from a rotation center and the first lever with respect to the rotation center.
And a second piece extending on the opposite side, one of a terminal connected to the float electrode or a ground side terminal being electrically connected to the switch lever, and the first piece having the float electrode. When a panel is attached to a position where the panel covers the storage location of the electrostatic precipitator, a protrusion provided on the panel is applied to the second piece. The household air cleaning device according to claim 1, wherein the switch lever is rotated against the biasing force by being pressed against.