JPH10314621A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner capable of using it by switching a fan operation for performing electric discharging dust collection and U.V. ray sterilization to an ionic wind operation for performing electric discharging dust collection of quiet sound and power saving. SOLUTION: This device is provided with electric discharging dust collection units 4, 5, a U.V. ray lamp unit 6 arranging a U.V. ray lamp 61 in a ventilation path formed with shielding plates 62, a fan 7 for ventilating to the respective units and also is provided with a ventilation path switching means for switching a first ventilation path formed with the shielding plates to a second ventilation path 67 low in a pressure drop, formed by closing the first ventilation path. Also this device can switch a fan operation for switching the ventilation path to the first ventilation path and for performing by driving the electric discharging dust collection units 4, 5, the U.V. ray lamp unit 6 and the fan 7 to an ionic wind operation for switching the ventilation path to the second ventilation path 67, for performing by driving the electric discharging dust collection units 4, 5 and for performing by utilizing the ionic wind generated by the electric discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier having a function of collecting dust by charging dust by electric discharge and a sterilizing function by ultraviolet rays.

[0002]

2. Description of the Related Art The method of collecting dust by charging the dust by electric discharge (corona discharge) has the advantage that it can collect fine dust that cannot be collected by a normal filter. In addition, since operation can be performed without using a ventilation fan by utilizing ion wind generated by an electron flow due to discharge, it is particularly effective for noise reduction and power saving at night.

[0003] On the other hand, sterilization by ultraviolet rays has been used for a long time, but when ultraviolet rays are irradiated on a resin-made main body case, ultraviolet rays are deteriorated in that portion. Therefore, the ventilation passage is formed by covering the ultraviolet lamp with a metal shielding plate so that the ultraviolet ray is not directly irradiated to the main body case.

Conventionally, a discharge dust collecting unit, an ultraviolet lamp unit, and a fan as described above are provided, air is taken in the room by the fan, and the dust in the taken air is charged by the discharge dust collecting unit to collect dust. Further, an air purifier that discharges after sterilization by an ultraviolet lamp unit is known.

[0005] An air purifier that performs only dust collection includes a discharge dust collection unit and a fan. During the daytime when the air is liable to be contaminated, the fan is driven to rapidly collect dust and the air is cleaned. There is also known an apparatus in which the fan is stopped during the night when the operation is not performed, and the operation is switched to a silent and power-saving ion wind operation using the ion wind caused by the above-described discharge.

[0006]

However, no air purifier provided with an ultraviolet lamp unit has been proposed as an air purifier capable of switching between the fan operation and the ion wind operation. This is because, as described above, the ultraviolet lamp unit has a shielding plate for protecting the main body case from ultraviolet rays, and this shielding plate is a pressure loss (ventilation resistance) of the ventilation path.
In order to prevent the air flow during the ion wind operation. That is, the ventilation by the ion wind is much weaker than the ventilation by the fan, so that a sufficient ventilation volume cannot be secured in the ventilation path having a high pressure loss (ventilation resistance) due to the shielding plate as described above.

Accordingly, the present invention has been made to solve such a problem, and has a discharge dust collection unit and an ultraviolet lamp unit, and operates a fan to perform discharge dust collection and ultraviolet sterilization by driving a fan. It is another object of the present invention to provide an air purifier that can be used by switching between an ion wind operation for performing silent and power saving discharge dust collection by ion wind without driving a fan.

It is another object of the present invention to provide an air purifier capable of securing a sufficient air flow even with only ion wind caused by discharge.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a discharge dust collecting unit for charging dust in air in a ventilation path by discharge and collecting the charged dust, and an ultraviolet lamp. And an ultraviolet lamp unit arranged in a ventilation path formed by a shielding plate for preventing the irradiation of the ultraviolet rays to the main body case, and a fan that ventilates each unit, and is formed by the shielding plate. A ventilation path switching means for switching between a first ventilation path having a high pressure loss and a second ventilation path having a low pressure loss formed by closing the first ventilation path; Switching to a ventilation path, a fan operation performed by driving the discharge dust collection unit, the ultraviolet lamp unit and a fan, and switching the ventilation path to a second ventilation path, driving the discharge dust collection unit,
It is characterized in that it is possible to switch between an ion wind operation performed using an ion wind generated by the discharge.

The ultraviolet lamp is covered with a pair of shielding plates movable in a lateral direction with respect to the ventilation passage, and the ultraviolet lamp is moved in a direction in which the pair of shielding plates come into contact with each other, thereby forming the first ventilation passage. Are closed, and second ventilation paths are formed on both sides thereof.

Further, the ventilation passage switching means is linked with the fan and the ultraviolet lamp unit to drive the discharge dust collection unit and to open the first ventilation passage by the ventilation passage switching means during the operation of the fan. The fan and the ultraviolet lamp unit are operated to drive the discharge dust collection unit during the ion wind operation, and the fan and the ultraviolet lamp unit are operated by opening the second air passage by the air passage switching means. Instead, the dust is collected by utilizing the ion wind generated by the discharge dust collection unit.

Further, a discharge unit is provided in the vicinity of the second ventilation passage for accelerating the ion wind generated by the discharge of the discharge dust collecting unit, and the discharge unit is driven only during the ion wind operation. It is.

[0013]

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

FIGS. 1 to 3 are overall structural views of an air purifier according to the present embodiment. FIG. 1 is a front view of a main body case with a front case and an inner case removed, and FIG. FIG. 3 and FIG. 3 are side sectional views during the ion wind operation.

This air purifier has a rectangular main body case 1.
The main body case 1 includes a front case 1a, a rear case 1b, and an inner case 1c that covers a fan, an ultraviolet lamp unit, and the like, which will be described later.

A pair of left and right ribs 2, 2 are formed in the rear case 1b in the vertical direction, and a pre-filter 3, a discharge unit 4, a dust collection unit 5 , An ultraviolet lamp unit 6, a fan 7, and the like.

The pre-filter 3 is attached to a suction port 8 formed on the bottom side of the main body, and removes relatively large dust contained in the sucked room air.

The discharge unit 4 includes a discharge wire 41 serving as a discharge electrode, a counter electrode 42 and the like. The discharge wire 41 is
Both ends are attached to the ribs 2 and 2 via a spring 43, and this spring 43
Can absorb the expansion and contraction caused by the linear expansion of the wire, and can always stretch the wire straight.
It can be easily removed for cleaning. A negative voltage of -6.5 kV is applied to the discharge wire 41 from a high voltage unit 44 provided between the rib 2 and the side wall of the rear case 1b.

The opposing electrode 42 is composed of a pair of grounding electrodes which are disposed vertically above and below the discharge wire 41, and extend from the discharge wire 41 to a corona as shown by dotted arrows in FIGS. The occurrence of discharge causes the opposing electrodes 42, 4
The dust in the air between the two is charged, and an ion wind is generated upward.

The dust collecting unit 5 includes front and rear cases 1a, 1b.
A dust-collecting paper 52 is exchangeably wound around a flat dust-collecting electrode 51 erected substantially at the center between the dust-collecting electrodes. The dust collecting electrode 51 is a ground electrode, and support legs 53,
53 is provided, and the support legs 53 are inserted between the ribs 2. The dust collecting paper 52 is wound so as to cover the entire front and rear surfaces of the dust collecting electrode 51, and both ends thereof are set by being pressed by a paper press 54 at the center of the front surface. The paper holder 54 is formed by bending both ends of a rod-shaped body having elasticity as shown in FIG. 4 and rotatably suspended between the support legs 53 of the dust collection electrode 51. Is provided with a convex body 55 for fixing the pressing piece 54a of the paper press 54 in a state of being elastically pressed against the surface of the dust collecting electrode 51.

The dust charged by the discharge unit 4 is attracted to a dust collecting electrode 51 serving as a ground electrode while passing through the ventilation path of the dust collecting unit 5, and is collected on a dust collecting paper 52 wound on the surface thereof. Is done. The dust-collecting paper 52 that has collected a large amount of dust and turned black can be removed by pulling down the paper holder 54, and is replaced with a new dust-collecting paper 52.

On the other hand, the ultraviolet lamp unit 6 has a rod-shaped ultraviolet lamp 61 whose both ends are fixed to the ribs 2 and 2, and a ventilating device for preventing ultraviolet rays emitted from the ultraviolet lamp 61 from being irradiated to the main body case 1. It is composed of a pair of metal shielding plates 62, 62 and the like forming a path.

As shown in FIG. 5, the pair of shielding plates 62, 62 have substantially the same shape, and are formed by opening two adjacent sides of a horizontally long box body and bending the wide end portion 62a inward. Is formed. Further, an L-shaped notch groove 6 through which the end of the ultraviolet lamp 61 passes is formed in the side plate 62 b at each end.
2c is formed, and a guide projection 62d is provided at an end of the L-shaped long side (long side in FIG. 5) in the extending direction. These shielding plates 62, 62 are aligned as shown in FIG. 6 by passing both ends of the ultraviolet lamp 61 through cutout grooves 62c formed in the both side plates 62b. Thus, the shielding plate 62 covering the ultraviolet lamp 61 is
It is housed in a unit case 63 shown on the upper side.

In both side plates 63a of the unit case 63, a long hole 63b through which an end of the ultraviolet lamp 61 passes is provided at the center.
Are formed, and on both sides thereof, eight-shaped guide grooves 63c, 63c into which guide protrusions 62d provided on the side plate 62b of the shielding plate 62 are fitted are formed.
A protruding piece 63d for attaching a switch knob to be described later is formed at a corner of one side plate 63a (right side in the figure) of the unit case 63.

The unit case 63 has an ultraviolet lamp 6
FIG. 7 shows a state where the first and the shielding plates 62 are stored. In addition,
FIG. 7A shows a state during a fan operation described later,
(B) shows the state at the time of the ion wind operation. The ultraviolet lamp 6 thus housed in the unit case 61
1 and the shield plate 62 are set between the ribs 2 and 2 with the front side of FIG.
UV lamp 6 protruding from a long hole 63b formed in
1 are fixed to the ribs 2 and 2 at both ends.

The projecting piece 63 of the unit case 63
d is exposed from a vertically elongated hole (not shown) in the front case 1a, and the switch knob 9 is attached to the exposed protruding piece 63d. Therefore, by moving the switch knob 9 up and down, the unit case 63 moves up and down in the ventilation path. As the unit case 63 moves up and down, the guide projections 62d of the shield plates 62, 62 fitted into the guide grooves 63c of the unit case 63 move closer to and away from each other. Moves back and forth in the lateral direction (horizontal direction) with respect to the ventilation path.

That is, when the switch knob 9 is at the uppermost position, as shown in FIG. 2 (FIG. 8 is an enlarged view of a main part thereof) and FIG. Then, a ventilation path (first ventilation path) 66 that passes through the ultraviolet lamp 61 and has a suction port 64 on the lower side and a discharge port 65 on the upper side is formed.

On the other hand, when the switch knob 9 is at the lowest position, as shown in FIG. 3 (FIG. 9 is an enlarged view of a main part thereof) and FIG. 7B, the respective shield plates 62 move to the center side. As a result, the ventilation path (first ventilation path) 66 passing through the above-described ultraviolet lamp 61 is closed, and instead, the ventilation plate with straight low pressure loss is provided on both front and rear sides of the shielding plates 62, 62. Roads (second ventilation paths) 67, 67 are formed.

The switch knob 9 serves as an operation switch of the apparatus, and is provided with a contact (not shown) which is turned on when the switch knob 9 is set at the highest position and the lowest position. This contact output is input to the control box 10 installed between the rib 2 and the side wall of the rear case 1b, and when the switch knob 9 is set to the highest position (fan operation position) (the first ventilation path 66 is formed). ), The high-voltage unit 44, the ultraviolet lamp 61, and a fan motor described later are energized. On the other hand, when the switch knob 9 is set to the lowest position (the ion wind operation position) (when the second ventilation passages 67, 67 are formed), the high-pressure unit 44
Only energized.

On the upper side (downstream side) of the ultraviolet lamp unit 6, a through-flow type fan 7 is provided. The fan 7 is rotated by a fan motor 71 installed between the rib 2 and the side wall of the rear case 1b. Driven. By the rotation of the fan 7, room air is sucked through a suction port 8 formed on the bottom side of the apparatus, and the sucked air passes through the discharge unit 4, the dust collection unit 5, and the ultraviolet lamp unit 6,
The air that enters the fan 7 from the inflow portion of the once-through fan 7 and exits from the discharge portion is exhausted indoors through an exhaust port 11 formed at the top of the device.

Next, the operation of the present embodiment configured as described above will be described.

First, the fan operation which is the first operation state will be described. When the fan operation is selected by setting the switch knob 9 at the highest position in the daytime when the air tends to become dirty, the high voltage unit 44, the ultraviolet lamp 61 and the fan motor 71 are energized via the control box 10. Further, the ultraviolet lamp unit 6 includes a projection 63d.
Unit case 63 with switch knob 9 attached to
Moves upward, so that the shape shown in FIG. 7A is obtained.
FIGS. 2 and 8 are sectional views of the main body at this time.

In this state, the air sucked by the fan 7 is taken into the inside of the main body from the suction port 8 on the bottom side of the apparatus, and the dust in the air becomes minus between the discharge wire 41 and the counter electrodes 42, 42. Charges. The charged dust is drawn to the dust collecting electrode 51 while passing through the ventilation path of the dust collecting unit 5 and collected by the dust collecting paper 52 wound on the surface thereof. All the air from which dust has been removed is a ventilation path (first ventilation path) formed by the shielding plates 62, 62 of the ultraviolet lamp unit 6.
Guided to the ultraviolet lamp 61 from the suction port 64 of 66,
Sterilized. The sterilized air exits through the outlet 65 of the ultraviolet lamp unit 6 and is exhausted into the room through the fan 7 through the upper exhaust port 11.

Next, the dust collection by the ion wind operation in the second operation state will be described. When the ion wind operation is selected by setting the switch knob 9 at the lowest position, for example, at night when the air is not very dirty, only the power supply of the high-voltage unit 44 is turned on via the control box 10, , 42 generate ion wind due to corona discharge. Furthermore, since the unit case 63 moves downward, the ultraviolet lamp unit 6 has the shape shown in FIG. 7B. FIGS. 3 and 9 are sectional views of the main body at this time.

The shielding plates 62, 6 of the ultraviolet lamp unit 6
2 is moved to the center as shown in FIGS. 3 and 9, so that ventilation paths formed on both front and rear sides thereof (second ventilation paths)
67 and 67 are straight, and a ventilation path with a low pressure loss sufficient for the ion wind to flow through the air is secured. Thus, the room air is smoothly taken into the main body, and the dust is collected on the dust collecting paper 52 in the same manner as described above.

As described above, according to this embodiment, in the case of the operation in which the fan 7 is driven, the taken-in air is rapidly collected by the discharge unit 4 and the dust collection unit 5, and the air after the dust collection is collected. All pass near the ultraviolet lamp 61 and are efficiently sterilized. Further, in the case of performing dust collection by the ion wind, the ventilation paths (second ventilation paths) 67, 67 having a low pressure loss sufficient to generate the ion wind are formed.
A sufficient amount of ventilation can be ensured only by ion wind caused by discharge.

Further, only by selecting the fan operation and the ion wind operation by the switch knob 9, the fan operation including the switching of the ventilation path and the ion wind operation are performed, and the ion operation performed at night when there is little air contamination is performed. At the time of wind operation, not only the fan 7 but also the ultraviolet lamp 61 is stopped, so that noise reduction and power saving can be efficiently realized by a simple operation.

FIGS. 10 to 12 show the overall construction of an air purifier according to another embodiment of the present invention. FIG. 10 is a front view of the main body case 1 with the front case 1a and the inner case 1c removed. Is a side sectional view at the time of fan operation, and FIG. 12 is a side sectional view at the time of ion wind operation. FIG. 13 is a view similar to FIG.
1 is an enlarged view of a main part, and FIG. 14 is an enlarged view of a main part of FIG. In the respective drawings, the same reference numerals as those in the above-described embodiment indicate the same or corresponding parts.

In this embodiment, the ribs 2 of the rear case 1b
2, the pre-filter 3, the first discharge unit 4, the dust collection unit 5, the second discharge unit 4a,
An ultraviolet lamp unit 6, a fan 7, and the like are arranged.

In the above, the pre-filter 3, the first discharge unit 4, the dust collection unit 5, the ultraviolet lamp unit 6, and the fan 7 are the same as those in the above-described embodiment, and have the same functions.

In this embodiment, a second discharge unit 4a is provided between the dust collection unit 5 and the ultraviolet lamp unit 6. The second discharge unit 4a is connected to the second discharge line 4
1a and second counter electrodes 42a and 42b.

The second discharge wire 41a, like the discharge wire 41 of the first discharge unit 4, is attached to the rib 2 via a spring 43a. The second opposed electrodes 42a, 42b are ground electrodes, and one of the opposed electrodes 42a corresponds to the suction port of the second ventilation path 67, 67 formed during the above-described ion wind operation, and one of the opposed electrodes 42a is a rear case 1b. The other counter electrode 42b is provided on the inner surface of the side wall of the unit case 63 of the ultraviolet lamp unit 6. In this arrangement, a groove corresponding to the thickness of the opposing electrodes 42a and 42b is formed on each inner wall surface, and the opposing electrodes 42a and 42b are formed in the grooves.
42b is fitted so that the respective inner wall surfaces are flattened, whereby the second ventilation path 67,
The pressure loss (ventilation resistance) at 67 is prevented from increasing.

The first discharge line 41 and the second discharge line 4
1a is output from the high-pressure unit 44 described above.
A negative voltage of 6.5 kV is applied, but is not applied directly here, but via the control box 10. That is, during ion wind operation,
Both the first discharge line 41 and the second discharge line 41a have a −
Although a negative voltage of 6.5 kV is applied, it is applied only to the first discharge line 41 during the fan operation, and the second discharge line 41 a
Is not applied.

The operation at the time of the fan operation is the same as that of the above-described embodiment (see FIGS. 11 and 13). However, as described above, the negative voltage of -6.5 kV output from the high voltage unit 44 is controlled by the control box. The voltage is applied only to the first discharge line 41 via the line 10, and is not applied to the second discharge line 41a, so that power consumption during fan operation does not increase.

On the other hand, at the time of the ion wind operation, the shielding plates 62 of the ultraviolet lamp unit 6 move to the center as shown in FIGS. The ventilation passages 67, 67 are formed. Further, the negative voltage of −6.5 kV output from the high voltage unit 44 is applied to the first discharge line 41 and the second discharge line 41 a via the control box 10. As mentioned above, the first
At the same time as the corona discharge generated in the discharge unit 4 generates an ion wind, the second discharge unit 4a also generates an ion wind due to the corona discharge as shown by a dotted arrow in FIG. This ion wind acts as an acceleration wind, and increases the air flow induced by the first discharge unit 4. Due to these ion winds, a larger amount of room air is taken into the main body than in the above-described embodiment, and dust in the air is collected more quickly.

As described above, according to the present embodiment, when dust is collected by the ion wind, the first ion-generated wind is generated.
In addition to the discharge unit 4, the second discharge unit 4a provided between the dust collection unit 5 and the ultraviolet lamp unit 6 induces the ion wind, thereby accelerating the ion wind and increasing the air flow during the ion operation. Is planned. In addition, during the operation of the fan, as in the above-described embodiment, a sufficient amount of air can be secured by the fan 7, so that the dust collection and sterilization effects can be improved, and the second discharge unit 4a is not operated. Only the first discharge unit 4 suppresses an increase in power consumption.

In each of the above embodiments, the discharge unit (the first discharge unit) 4 and the dust collection unit 5 are provided as separate units as the discharge dust collection unit. There is also a discharge dust collection unit that functions as a dust collection electrode, and the present invention is applicable to such a discharge dust collection unit.

In the above embodiment, the pair of shielding plates 62, 62 are moved toward the center to form second ventilation paths 67, 67 with small ventilation resistance (pressure loss) on both front and rear sides. However, the second ventilation path may be formed only on one side by moving only one of the shielding plates. Furthermore, for example, a first ventilation path with high pressure loss is formed by a shielding plate in the front half of the ventilation path,
A straight second air passage having a low pressure loss may be formed in the rear half, and each air inlet may be opened and closed by a damper or the like to switch the air passage.

[0049]

As described above, according to the present invention, the first ventilation passage having a high pressure loss formed by the shielding plate and the first ventilation passage are provided.
A ventilation path switching means for switching between the ventilation path and the second ventilation path having a low pressure loss formed by closing the ventilation path.
The fan operation is performed by driving the discharge dust collection unit, the ultraviolet lamp unit, and the fan, and the ventilation passage is switched to the second air passage, and the discharge dust collection unit is driven to generate ions generated by the discharge. Since it is possible to switch between ion wind operation using wind and wind, it is possible to select between rapid dust collection and sterilization operation with a fan and silent power saving dust collection operation with ion wind. A good air purifying effect can be obtained.

The ultraviolet lamp is covered with a pair of shielding plates movable in the lateral direction with respect to the ventilation passage, and the pair of shielding plates is moved in a direction in which they contact each other, whereby the first ventilation passage is formed. Since it is closed and straight second ventilation paths are formed on both sides thereof, in addition to the above-mentioned effects, there is an effect that a sufficient amount of ventilation can be ensured only by ion wind caused by discharge.

Further, the ventilation passage switching means is linked with a fan and an ultraviolet lamp unit to drive the discharge dust collection unit when the fan is operated, and to open the first ventilation passage by the ventilation passage switching means to release the fan and the ultraviolet rays. When the lamp unit is operated and the ion wind operation is performed, the discharge dust collection unit is driven, while the second ventilation passage is opened by the ventilation passage switching means, and the fan and the ultraviolet lamp unit are not operated, and the discharge dust collection unit is operated. Since dust is collected using wind, in addition to the above effects, fan operation and ion wind operation including ventilation path switching can be performed by simply selecting either fan operation or ion wind operation with a switch knob or the like. When the ion wind operation is performed at night when the air pollution is low, not only the fan but also the ultraviolet lamp is stopped. , Power saving can be achieved efficiently with noise reduction.

Further, a discharge unit for accelerating the ion wind generated by the discharge of the discharge dust collecting unit is provided near the second ventilation path, and the discharge unit is driven only during the ion wind operation. In addition, it is possible to efficiently increase the amount of air flow during the ion wind operation without increasing the power consumption during the fan operation.

[Brief description of the drawings]

FIG. 1 is a front view showing the internal configuration of an air purifier according to an embodiment of the present invention.

FIG. 2 is a side sectional view at the time of fan operation in the embodiment.

FIG. 3 is a side sectional view at the time of ion wind operation in the embodiment.

FIG. 4 is an enlarged view of a main part of the dust collection unit in the embodiment.

FIG. 5 is an exploded perspective view of the ultraviolet lamp unit in the embodiment.

FIG. 6 is a perspective view showing a state where an ultraviolet lamp is covered by the shielding plate of FIG. 5;

FIG. 7 is a perspective view showing a shape change during fan operation and ion wind operation of the ultraviolet lamp unit in the embodiment.

FIG. 8 is an enlarged cross-sectional view of a main part during fan operation in the embodiment.

FIG. 9 is an enlarged cross-sectional view of a main part during ion wind operation in the embodiment.

FIG. 10 is a front view showing the internal configuration of an air purifier according to another embodiment of the present invention.

FIG. 11 is a side sectional view of the other embodiment during fan operation.

FIG. 12 is a side sectional view at the time of ion wind operation in the other embodiment.

FIG. 13 is an enlarged cross-sectional view of a main part during a fan operation according to the other embodiment.

FIG. 14 is an enlarged cross-sectional view of a main part during ion wind operation in another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Rib 4 Discharge unit (1st discharge unit) 41 Discharge line (1st discharge line) 42 Counter electrode (1st counter electrode) 4a 2nd discharge unit 41a 2nd discharge line 42a, 42b Second counter electrode 44 High voltage unit 5 Dust collection unit 51 Dust collection electrode 52 Dust collection paper 6 Ultraviolet lamp unit 61 Ultraviolet lamp 62 Shielding plate 66 First ventilation path 67 Second ventilation path 7 Fan 71 Fan motor 9 Switch knob 10 Control box

Claims (4)

[Claims] 1. A discharge dust collecting unit for charging dust in air in a ventilation path by discharge and collecting the charged dust, and an ultraviolet lamp formed of a shielding plate for preventing irradiation of the main body case with the ultraviolet rays. An ultraviolet lamp unit disposed in a ventilation path to be provided, a fan that ventilates each unit, a first ventilation path with high pressure loss formed by the shielding plate, and the first ventilation path A ventilation path switching means for switching between the ventilation path and the second ventilation path having a low pressure loss formed by closing the ventilation path; switching the ventilation path to the first ventilation path; And the ion wind operation performed by switching the ventilation path to the second ventilation path, driving the discharge dust collection unit, and utilizing the ion wind generated by the discharge. Air purifier is characterized in that the capacity. 2. The first ventilation path is covered by a pair of shielding plates movable in a lateral direction with respect to the ventilation path, and the ultraviolet lamp is moved in a direction in which the pair of shielding plates contact each other. 2. The air purifier according to claim 1, wherein the second air passage is formed on both sides of the air purifier. 3. The ventilation path switching means is linked with the fan and the ultraviolet lamp unit to drive the discharge dust collection unit and to open the first ventilation path by the ventilation path switching means during the operation of the fan. The fan and the ultraviolet lamp unit are operated to drive the discharge dust collection unit during the ion wind operation, and the fan and the ultraviolet lamp unit are operated by opening the second air passage by the air passage switching means. The air purifier according to claim 1 or 2, wherein dust is collected by using ion wind generated by the discharge dust collection unit. 4. A discharge unit for accelerating an ion wind generated by a discharge of the discharge dust collecting unit is provided near the second ventilation path, and the discharge unit is driven only during an ion wind operation. Claims 1 to 3
The air purifier according to any one of the above.