JPH1176864A - Ion type air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To furthermore generate negative ions at the time when a flow of ions is generated between an ionization wire and an opposed electrode and at the same time to lower the generation amount of ozone harmful to human body. SOLUTION: This air cleaner is provided with a dust collecting unit and an accelerating unit; and the dust collecting unit comprises an ionization wire 32 to which voltage with positive polarity is applied to charge dust in a gas with positive electric charge and collect the dust, an opposed electrode to which voltage with negative polarity is applied, and a dust collecting electrode 34 and the accelerating unit comprises an ionization wire 41 to which voltage with positive polarity is applied to accelerate a gas from the dust collecting unit 3 and an opposed electrode 42 to which voltage with negative polarity is applied. Voltage is applied to respective electrodes so as to make the absolute value of voltage applied between the opposed electrodes 33, 42 and an earth plate 44 higher than the absolute value of voltage applied between the ionization wires 32, 41 and the earth plate 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion-type air purifier suitable for use in an air purifier requiring collection of fine dust. Specifically, when a flow of ions is generated between an ionization line that charges positively charged dust in a gas and a dust collection electrode that collects dust charged with the positive charge, the ion is applied to the dust collection electrode. The negative voltage is increased to the negative polarity side to increase the generation of negative ions, and the positive voltage applied to the ionization line is suppressed to reduce the amount of ozone harmful to the human body. Can be lowered.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an ion-type air purifying apparatus for purifying dust and the like in the air by charging the dust and the like with a positive charge and collecting the dust. In this type of air cleaning device, an ionizing line for generating a flow of ions and a dust collecting electrode for collecting dust charged to a positive charge are provided. A voltage of about +6000 V is applied to the ionization line, and a voltage of about -6000 V is applied to the dust collection electrode. Due to a potential difference of 12000 V between them, an aerial discharge is generated between the ionizing wire and the dust collecting electrode, and dust and the like in the air charged to a positive charge are attracted to the dust collecting electrode.

At this time, charged dust and the like move from the ionization line to the dust collecting electrode, so that a flow of ions called ion wind occurs. By the flow of ions and the Coulomb force, dust and the like in the air are collected by the dust collection electrode and cleaned. Further, ozone generated by the discharge between the ionization line and the dust collecting electrode is adsorbed and decomposed by the catalyst.

As described above, in the ion type air purifying apparatus, since the ion wind and the Coulomb force are applied, no noise is generated, and no forced suction / exhaust equipment such as a fan is required. , Even fine dust particles can be removed.

[0005]

By the way, in the conventional ion-type air purifying device, -60 is provided between the dust collecting electrode and the ground.
A voltage of about 00 V is applied, and a voltage of about +6000 V having the same absolute value as this voltage is applied between the ionization line and the ground.

The flow of ions can be generated between the ionizing wire and the dust collecting electrode by the potential difference of 12000 V between them. Further, the voltage applied between the dust collecting electrode (hereinafter also referred to as a counter electrode) and the ground is -6000V.
It is already known that a negative ion that is superior to a living body is generated if the following conditions are satisfied.

However, the oxygen in the gas is excited and recombined by the voltage of +6000 V applied between the ionizing wire and the ground, and ozone harmful to the human body is generated. It is already known that this ozone is generated in proportion to the magnitude of the voltage applied between the ionizing wire and the ground. Therefore, in order to suppress the generation of ozone, it is necessary to suppress the voltage applied between the ionization line (hereinafter also referred to as a discharge line) and the ground as low as possible.

Accordingly, the present invention has been made to solve such a problem, and it is possible to generate more negative ions when generating a flow of ions between a discharge line and a counter electrode. Another object of the present invention is to provide an ion-type air purifying device capable of reducing the amount of ozone harmful to the human body.

[0009]

In order to solve the above-mentioned problems, an ion-type air cleaning apparatus according to the present invention comprises a discharge line to which a positive voltage is applied, and a negative electrode at a position opposed to the discharge line. A counter electrode to which a voltage is applied, and generates an ion flow by a potential difference between the discharge wire and the counter electrode, and collects dust by charging the dust in the gas with a positive or negative charge. In the air cleaning device, the absolute value of the negative voltage applied between the counter electrode and the ground is larger than the absolute value of the positive voltage applied between the discharge wire and the ground. Then, a voltage is applied to each electrode.

According to the present invention, for example, when the potential difference required to generate the flow of ions between the discharge line and the counter electrode is at least about 10,000 V, the positive polarity voltage Va applied to the discharge line is Va ≦ By setting the voltage to +4000 V, the amount of ozone harmful to the human body can be reduced. Further, the negative voltage Vk applied to the counter electrode is Vk ≦ −6.
By setting the voltage to 000 V, a large amount of negative ions can be generated as in a known technique.

Further, by setting the potential difference between the discharge line and the counter electrode to 10,000 V, it is possible to generate a flow of ions between the discharge line and the counter electrode and to charge the dust in the gas with, for example, a positive charge. By doing so, dust can be collected.

The ion-type air purifying apparatus according to the present invention generates a flow of ions and applies a positive voltage for charging the dust in the gas with a positive or negative charge to collect the dust. A dust collection unit having a discharge wire of the same type and a counter electrode for dust collection to which a negative voltage is applied, and an accelerating discharge unit to which a positive voltage for accelerating gas from the dust collection unit is applied. An accelerating unit having an electric wire and an accelerating counter electrode to which a negative voltage is applied is provided, and the absolute value of the voltage applied between the discharging wire for collecting dust and the ground is used for collecting dust. Voltage is applied to each electrode so that the absolute value of the voltage applied between the opposing electrode and the ground is larger, and the absolute value of the voltage applied between the acceleration discharge wire and the ground Voltage applied between the counter electrode for acceleration and ground It has been made to apply a voltage to each electrode so it is larger in value.

According to the ion type air cleaning apparatus of the present invention, in the dust collecting unit, while ensuring a potential difference required to generate a flow of ions between the discharge wire for dust collection and the counter electrode, Since the negative voltage applied between the counter electrode and the ground can be increased, dust in the air can be collected as in the conventional method. At the same time, the positive voltage applied between the discharge wire for dust collection and the ground can be suppressed, so that the amount of ozone harmful to the human body can be reduced.

In the acceleration unit, the potential applied between the discharge electrode for acceleration and the counter electrode is secured between the counter electrode and the ground while ensuring a potential difference necessary to assist the flow of ions. Since the voltage of the negative polarity can be increased, the air after cleaning can be accelerated much. At the same time, the positive voltage applied between the discharge wire for acceleration and the ground can be suppressed, so that the amount of ozone harmful to the human body can be reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an ion-type air cleaning device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of an ion-type air cleaning device 100 as an embodiment. In this embodiment, when the filter mounting portion is tilted to the open window side of the housing, the filter mounting portion is inclined to the outside of the housing, and the surface of the filter mounting portion is provided on one side of the housing. In addition, the filter on the back side can be replaced.

In FIG. 1, an air cleaning apparatus 100 includes an insulating base 1 having a bottom surface having an elliptical shape. Base 1
Is mounted with an elliptical column-shaped cabinet 2 as a housing having an open window 6 on the outer surface. The cabinet 2 is formed by resin molding. On the front side between the base 1 and the cabinet 2, an intake port 2A having an elongated opening is provided,
Air is taken in from the outside into the cabinet. A dust collection unit 3 is provided above the intake port 2A inside the cabinet, and dust in the air is collected by ion wind heading upward from the lower side and Coulomb force due to positive and negative voltages.

An accelerating unit 4 is provided above the dust collecting unit 3.
Is provided, and the clean air from which dust has been removed is accelerated by the ion wind. An exhaust port 5 is provided at the upper part of the acceleration unit 4, and clean air is released to the outside by natural circulation by ion wind. The exhaust port 5 has a lattice shape so that objects do not fall from the outside.

An LCD display unit 7 is provided on the left side of the upper surface of the cabinet 2, and the operation time of this device is displayed by a timer circuit described later. A power switch 8 is provided on the right side of the upper surface of the cabinet, and this device operates when the power is turned on.

The dust collecting unit 3 has a pair of insulating electrode holders 31 having a rotating shaft 35 shown in FIG. A pair of bearings 2B are provided on the left and right sides of the lower surface inside the cabinet, and the respective rotating shafts 35 of the dust collection unit 3 are engaged. With this configuration, the electrode holder 31 can be freely rotated with respect to the cabinet 2. An ionization wire 32 as a discharge wire is folded back and attached in a U-shape so as to connect between the left and right electrode holders 35 at portions close to the respective rotation shafts 35.
The ionization wire 32 is made of a tungsten wire having a diameter of about 0.3 mmφ, and a positive voltage Va is applied.

A box-shaped counter electrode 33 whose upper and lower parts are open is attached between each electrode holder 31 at a position facing the ionization line 32 at a predetermined distance from the ionization line 32. Can be The counter electrode 33 is formed by bending an iron plate, and a negative voltage Vk is applied. This counter electrode 3
Plate-shaped dust collecting electrode 3 so as to divide the electrode 3 in half in the longitudinal direction.
4 are mounted so as to be electrically at the same potential. The dust collecting electrode 34 is made of an iron plate, and is integrated with the counter electrode 33 by welding or screwing. The filter 10 is attached to the front and back of the dust collecting electrode 34. Dust collection unit 3
Then, a flow of ions is generated by a potential difference applied between the ionization line 32 and the counter electrode 33, and the dust in the gas is charged with a positive charge to be collected on the filter 10.

As the filter 10, a paper filter such as kitchen paper or antibacterial paper is used. For example, the folded filter 10 is attached to the front and back of the dust collecting electrode 34 so as to straddle the dust collecting electrode 34. If the filter 10 becomes dirty, it can be easily replaced on one side of the cabinet 2. The acceleration unit 4 has an ionization line 41 and a counter electrode 42 shown in FIG. The acceleration unit 4 will be described in detail with reference to FIGS.

In this embodiment, when the filter 10 is replaced or the like, the electrode holder 31 with the dust collecting electrode 34 shown in FIG. 2 is turned around the turning axis toward the open window 6 of the cabinet 2. , The dust collecting electrode 34 is inclined by an angle θ outside the cabinet 2. In this example, θ = 4
Since it is inclined to about 5 °, the state of the back surface of the dust collecting electrode 34 can be easily checked from the open window side.

As described above, the dust collecting electrode 34 is connected to the cabinet 2
When the filter 10 is inclined outward, not only the front surface of the dust collecting electrode 34 but also the filter 10 on the rear surface can be replaced on the side of the cabinet 2 where the filter 10 is taken out. Therefore, unlike the conventional system, it is not necessary to have a double-sided open window structure in which the filter 10 is exchanged from both sides of the cabinet 2, so that one side of the cabinet 2 can be formed as an integral structure without an open window. With this structure, the air cleaning device 10
In the case where the cabinet 2 of No. 0 is resin-molded by an injection molding apparatus or the like, the structural strength of the frame can be improved.

Further, three bosses 11A to 11C as projections are provided on the inner rear side of the cabinet 2 facing the open window 6 shown in FIGS. The dust collecting electrode 34 comes into contact when the dust collecting electrode 34 is stored around the inside of the cabinet. When the position is regulated in this manner, the cabinet 2 and the dust collecting electrode 34 can be always fixed at a position where the dust collecting electrode 34 contacts the bosses 11A to 11C.

A reset switch 12 is provided between the cabinet 2 and the electrode holder 31, and the control system is reset when the electrode holder 31 is moved to the open window side. The reset switch 12 will be described with reference to FIGS.

Further, in this embodiment, the lid is a cover as shown in FIG.
The decorative panel 9 shown in FIG. Inside the decorative panel 9, a boss 9A for temporarily holding a filter as a projection is integrally formed. This function is such that when the decorative panel 9 is attached to the open window portion 6 of the cabinet 2, the position of the filter 10 is regulated by the boss 9A until a voltage is applied between the ionizing wire 32 and the counter electrode 33. It was done.

Then, the power is turned on, and the ionization line 3 is turned on.
When a voltage is applied between the second electrode 2 and the counter electrode 33, Coulomb force acts between the ionization line 32 and the counter electrode 33, and the filter 10 is attracted to and fixed to the dust collecting electrode 34. Therefore, if the position is regulated in this way,
Until this state, the dust collecting electrode 34 in the cabinet 2
Can be maintained in a certain direction.

In this embodiment, the length of the boss 9A is defined as follows. In FIG. 3, when the decorative panel 9 is attached to the open window 6 of the cabinet 2, the tip of the boss 9A is located between the counter electrode 33 and the dust collecting electrode 34 on the open window side, and It is arranged closer to the dust collection electrode than to an intermediate position with the dust collection electrode 34.

That is, when the decorative panel 9 is closed and the distance between the dust collecting electrode 34 and the tip of the boss 9A is A1, and the distance from the counter electrode 33 to the tip of the boss 9A is B1, the distances A1 and B1 Boss 9 so that A1 <B1
Define the length of A. Then, a voltage is applied between the ionization line 32 and the counter electrode 33, and the ionization line 32
When the Coulomb force acts between the filter 10 and the counter electrode 33, both the counter electrode 33 and the dust collecting electrode 34 at the same potential
Try to adsorb. However, since the tip of the boss 9A is located closer to the dust collection electrode than the intermediate position between the counter electrode 33 and the dust collection electrode 34, the filter 10 is not drawn to the counter electrode 33 on the open window side, The filter 10 is forcibly drawn to the dust collecting electrode side.

Therefore, it is possible to collect the dust while the filter 10 is attached to the front and back of the dust collecting electrode 34 exactly.
Incidentally, when the filter 10 adheres to the counter electrode 33 side by Coulomb force, air flows into the inside of the filter, so that the flow of ionic wind is blocked and the air flow is reduced. Such a situation can be avoided in the method of the present invention.

Next, a method of wiring the ionizing lines 32 and the counter current 3 will be described. In this embodiment, a hollow portion 35A is provided on the movable shaft 35 of the electrode holder 31 shown in FIG. 4, and electric wires 32B and 33B reaching the ionization line 32 and the counter electrode 33 through the hollow portion 35A are wired. In FIG. 4, a terminal plate 32A is provided on the ionization line 32, and an electric wire 32 for supplying a positive voltage Va is provided.
B is connected. The opposite electrode 33 is also provided with a terminal plate 33A, to which an electric wire 33B for supplying a negative voltage Vk is connected.

Openings 35B, 2C are provided above the rotating shaft 35 of the electrode holder 31 and the bearing 2B of the cabinet 2.
Are provided through the openings 2C and 35B.
5, the electric wires 32B and 33B are guided into the hollow portion. An opening 2D is also provided on the side surface of the bearing 2B, and the wires 32B and 33B from the hollow portion 35A are connected to the opening 2D.
It is drawn out through D.

When wiring is performed using the hollow portion 35A of the rotating shaft 35, the wires 32B and 33B reaching the terminal plates 32A and 33A are scattered as compared with the case where wiring is performed without using the hollow portion 35A. Without routing
Wiring can be made neatly at the shortest distance. At the same time, when the electrode holder 31 with the dust collecting electrode 34 is rotated inside or outside the cabinet 2, the movement of the electric wires 32B and 33B can be suppressed to a minimum, so that stress applied to these electric wires 32B and 33B is reduced. Can be extremely small. Disconnection of these electric wires 32B and 33B can be prevented.

Next, the structure of the acceleration unit 4 will be described. In this embodiment, the counter electrode 42 of the acceleration unit 4
Notches 42A to 42D are provided at the ends of the notches, and the electric field intensity at the notches 42A to 42D is reduced, so that the amount of ozone harmful to the human body can be reduced without reducing the flow rate of ions in the entire apparatus. It is intended to be suppressed.

The accelerating unit 4 does not have a movable structure like the dust collecting unit 3 and is directly mounted on both inner side surfaces of the open window 6 as shown in FIG. The fixed structure is used because a replacement part such as the filter 10 cannot be attached.

The accelerating unit 4 has a single ionizing line 41 for acceleration shown in FIG. 5 and a box-shaped metallic counter electrode 42 having upper and lower surfaces opened at positions facing the ionizing line 41.
have. The reason why the upper and lower surfaces are open is that the air after cleaning flows from the lower side to the upper side. At the end of the counter electrode 42, a pair of notches 42A, 4
2B, 42C, and 42D are provided, and the electric field intensity of this portion is reduced as compared with the electric field intensity of the other portions.

That is, the distance between the ionization line 41 shown in FIG. 6 and the end of the counter electrode 42 where the notches 42A and 42B are not provided is x1, and the ionization line 41 and the notches 42A and 42B Let x2 be the separation distance between the distances x1, x2> x1.

The separation distance x2 between the ionizing line 41 and the counter electrode 42 is longer than x1 when the notches 42A to 42D are provided than when the notches 42A to 42D are not provided. . Since the electric field strength is inversely proportional to the separation distance, as is well known, the electric field strengths of the notches 42A to 42D are not equal to the notches 42A to 42D.
Can be reduced as compared with a portion where no is provided.

Therefore, the dust collection unit 3 is
Similarly, the voltage Va of the positive polarity is applied,
When a negative voltage Vk is applied to the substrate, the cleaned air is accelerated by the ion wind generated by the discharge due to the potential difference. At this time, unlike the conventional method, the counter electrode 4
Since the electric field intensity proportional to the generation of ozone can be reduced in the portion provided with the two notches 42A to 42D, the entire apparatus does not reduce the amount of gas suction and exhaust from the dust collection electrode 34 and is harmful to the human body. The amount of generated ozone can be suppressed.

In this embodiment, a discharge needle 43 is attached to the back side of the counter electrode 42 shown in FIG.
3 and the counter electrode 42 are maintained at the same potential. The discharge needle 43 is used to generate negative ions. The discharge needle 43 is provided on the right side of the counter electrode 42 so as to be offset.

That is, the distance between the left end of the counter electrode 42 and the discharge needle 43 shown in FIG.
Assuming that the separation distance between the right end of the second and the discharge needle 43 is B2, the separation distances A2 and B2 are A2 >> B2. The reason why the discharge needles 43 are arranged on one side in this manner is that the amount of negative ions that are offset by positive ions can be reduced as compared with the case where the discharge needles 43 are attached to the central portion of the counter electrode 42. .

Further, a ground plate 44 as an electrode having the same potential as the ground is attached to a position near the exhaust port 5 and facing the discharge needle 43, and is maintained at a potential of 0V. Thus, negative ions can be generated between the discharge needle 43 to which the same negative voltage Vk as that of the counter electrode 42 is applied and the ground plate 44 having the potential of 0V.

Negative ions have many advantageous effects on the human body, such as a sedative effect and promotion of recovery from fatigue. Other effects of negative ions include enhancing cardiopulmonary function to regulate blood pressure and respiration, lowering blood sugar levels, and healing effects on burns. With this air purifying device 100, a healthy and comfortable indoor environment can be realized. The effect of promoting the growth of living things (plants) can also be improved.

The ionization wire 41 shown in FIG. 7 is provided with a terminal plate 41A, to which an electric wire 41B for supplying a positive voltage Va is connected. The terminal plate 4 is also provided on the opposite electrode 42.
2A is provided, and an electric wire 42B for supplying a negative voltage Vk is connected. The ground plate 44 is also provided with a terminal plate 44A, to which a ground line 44B for supplying a potential of 0 V is connected.

Next, the voltage value applied to each of the above-described electrodes will be described. In this embodiment, when a flow of ions is generated between the ionization lines 32 and 41 and the counter electrodes 33 and 42, the negative voltage applied to the counter electrodes 33 and 42 is increased to the negative polarity side, and the negative voltage is increased. In addition to increasing the generation of ions, the ionization lines 32 and 41
, The amount of ozone harmful to the human body can be reduced.

That is, in the present embodiment, the absolute value of the voltage applied between the ionization line 32 and the ground plate 44 shown in FIG. A voltage is applied to each electrode so that the absolute value is larger. At the same time, the ionizing wire 41 and the ground plate 4
The voltage is applied to each of the electrodes so that the absolute value of the voltage applied between the counter electrode 42 and the ground plate 44 is larger than the absolute value of the voltage applied between the electrodes. You.

As an example of a voltage supply method for satisfying this condition, the ionization line 32 and the ionization line 41 shown in FIG. 8 are connected in parallel and wired to the high voltage generation block. The counter electrode 33 and the counter electrode 42 are also connected in parallel and wired to the high voltage generation block. Moreover,
Between the ionization lines 32 and 41 and the counter electrodes 33 and 42,
When the potential difference required to generate the flow of ions is, for example, about 9400 V, the ionization lines 32 and 41
Is set to Va = + 3200 V, and the negative voltage Vk applied to the counter electrodes 33 and 42 is set to Va = + 3200 V.
Is set to Vk = −6200V.

When the voltage value is defined in this way, in the dust collection unit 3, the potential difference 94 required to generate a flow of ions between the ionization line 32 and the counter electrode 33.
While maintaining 00V, the negative voltage Vk = -6200V applied to the counter electrode 33 is reduced by -60 in the conventional method.
Since the voltage can be made larger than 00 V, a large amount of dust in the air can be collected. At the same time, the positive voltage Va = + 3200 V applied to the ionization line 32 can be suppressed lower than +6000 V in the conventional method, so that the amount of ozone harmful to the human body can be reduced.

Also in the acceleration unit 4, the potential difference 9400 V required to assist the flow of ions between the ionization line 41 and the counter electrode 42 is secured while the gap between the counter electrode 42 and the ground plate 44 is maintained. , The negative voltage Vk = -6200 V applied thereto can be made higher than the conventional method of -6000 V, so that a large amount of negative ions can be generated. At the same time, the positive voltage Va = + 3200 V applied to the ionization line 41 is increased by +600 of the conventional method.
Since the voltage can be kept lower than 0 V, the amount of ozone harmful to the human body can be reduced.

Here, the present inventors obtained the following results from the following experiment. According to the method of the present invention, ionization lines 32 and 4 are used.
1, a voltage of Va = + 3200 V is applied to the counter electrode 3
Vk = −6200 V is applied to 3 and 42 to exhaust port 5
The ozone concentration was measured. At this time, the ozone concentration at the exhaust port 5 was 0.05%.

On the other hand, as a conventional system, a voltage of Va = + 4750 V is applied to the ionization lines 32 and 41, and a voltage of −4750 V is applied to the opposing electrodes 33 and 42, and the ozone concentration at the exhaust port 5 is increased. Was measured. At this time, the ozone concentration at the exhaust port 5 was 0.08%. As a result, the ozone concentration could be reduced by 37.53% in the method of the present invention as compared with the conventional method.

Next, a control system of the ion-type air cleaning device 100 to which the filter replacement notice device is applied will be described. In this embodiment, as the replacement time of the filter 10 approaches, the pixel display on the LCD display unit 7 is gradually increased, and when the filter replacement time comes, all the display areas allocated to the advance notice display are used. hand,
Pixel display such as warning blinking is performed. As a result, it is possible to further urge the user to arrive at the filter replacement time.

The control circuit 200 of the air purifying apparatus 100
Is provided with a power plug 50 shown in FIG.
It is used by being connected to C100V. The power supply unit 51 is connected to the power supply plug 50, and 100 V AC is supplied by turning on the power supply switch 8. A DC-DC converter 52 is connected to an output stage of the power supply unit 51. D
In the C-DC converter 52, AC 100V is temporarily converted into a DC voltage, and the DC voltage is subjected to chopping control, and then boosted by a transformer having a predetermined turns ratio. DC-D
A high voltage generation block 53 is connected to the output stage of the C converter 52, and generates a DC high voltage obtained by rectifying the output of the transformer. In this embodiment, assuming that the potential of the ground line GND is 0 V, Va = + 3200 V as a positive voltage and Vk = −6200 V as a negative voltage are generated.

The power supply unit 51 is provided with a safety switch 57. For example, when the decorative panel 9 is removed from the cabinet 2, the voltage of the control system is removed.
Control is performed so that power to converter 52 is turned off. With this control, the functions of the DC-DC converter 52 and the high voltage generation block 53 are stopped.

When the power supply of the power supply unit 51 is controlled via the control system, a sensor 58 is provided so that the control system can recognize that the decorative panel 9 has been removed from the cabinet 2. In addition, instead of providing the sensor 58, a safety switch 57 'may be provided directly between the cabinet 2 and the decorative panel 9 shown in FIG.

In this case, a projection 9B is provided inside the decorative panel 9 shown in FIG. 10, and when the decorative panel 9 is mounted on the cabinet 2, the projection 9B is
Turns on by touching 7 '. Conversely, when the decorative panel 9 is removed from the cabinet 2, the projection 9B is turned off by separating from the safety switch 57 '.
By turning this off, all functions of the power supply unit 51 may be stopped. As a result, the burden on the control system can be reduced, and safety for the user when replacing the filter can be ensured.

Returning to FIG. 9, the safety switch 57
Alternatively, a CPU (Central Processing Unit) 54 is connected to the sensor 58, and as the replacement time of the filter 10 approaches, LC
Control is performed to increase the number of pixel displays of the D display unit 7 in a stepwise manner.

The CPU 54 is connected to a timer circuit 55 as an integrating unit, which turns on the power switch 8 and integrates the operation time of the apparatus 100. This timer circuit 55 has only the integrated time information D1 from the time when a new filter 10 is exchanged to the time when the next filter 10 is exchanged, independently of a so-called normal operation timer for specifying the operation time of the present apparatus 100 in advance. Is output to the CPU 54.

A RAM 56, which is also used as a work memory, is connected to the CPU 54, and when the power of the apparatus 100 is turned off, the operation time information D1 is recorded. When the power is turned on again, the operation time information D1 is read out, and the operation time information from that point is added to the operation time information D1.

The CPU 54 compares the integrated time information D1 from the timer circuit 55 with the preset replacement time information D2 of the filter 10. The exchange time information D2 is, for example, operation time information for four weeks. As a result of this comparison, if the accumulated time information D1 exceeds the exchange time information D2,
The pixel display indicating that the filter replacement time has come is performed by the LCD display unit 7.

The LCD display unit 7 comprises, for example, a liquid crystal display capable of displaying red, blue and green colors.
Has a circular display area shown in FIG. The lower half display area of the LCD display unit 7 is used as a reservation timer display area 7A when reserving a normal operation time. In this example, the reservation timer display area 7A is divided into three,
The operation time was 4 hours, 8 hours, 12 hours (4 hours
h, 8h, 12h) can be set.

The display area in the upper half of the LCD display unit 7 is used as a notice display area 7B for filter replacement. In the notice display area 7B, different displays are performed before the filter 10 replacement time comes and after the filter 10 replacement time comes.

That is, before the time for replacing the filter 10 arrives, for example, in FIG.
A single concentric semicircular pattern shown in FIG. This semicircular pattern is illuminated and displayed such that the number of patterns increases by one each time the integrated operation time elapses for one week. Therefore, when the accumulated operation time exceeds two weeks, it becomes two as shown in FIG. 12B, and when it becomes three weeks, it becomes three as shown in FIG. 12C.

By displaying such a light in the notice display area 7B, it is possible to confirm the total operation time from the time of filter replacement by the number of semicircular patterns, and that the filter replacement time is approaching due to the increase in the semicircular patterns. Can be confirmed.

When the four semicircular patterns shown in FIG. 12D are displayed in pixels after the filter 10 replacement time has come, the pixel display is made to blink from the central semicircular pattern to the outer semicircular pattern. I have to. By displaying such a moving image, it is possible to further alert the user to the arrival of the filter replacement time, as compared to a static display or the like by lighting a plurality of semicircular patterns before the filter replacement time. The user can check the stock of the filter 10 with a margin.

Next, the function of the reset switch 12 will be described. In this embodiment, a reset switch 1 is provided between the electrode holder 31 and the cabinet 2 shown in FIG.
2 is provided, and at the same time when the electrode holder 31 with the dust collecting electrode 34 is separated from the cabinet 2 to the open window 6 side,
The reset switch 12 is turned on to clear the accumulated operation time of the apparatus 100.

As the reset switch 12, a push-off type micro switch is used. Reset switch 1
By the ON operation of 2, the CPU 54 can control the timer circuit 55 so as to consider that the filter 10 has been replaced and to newly add the operation time from zero when the power is turned on. Therefore, since the reset operation can be automated, the operation burden on the user is reduced.

Next, the filter replacement notice flowchart of the air purifying apparatus of this embodiment will be described with reference to FIGS.
It will be described with reference to FIG.

As a prerequisite for operating the present apparatus 100, first, the filter 10 is attached to the dust collecting electrode 34 shown in FIG.
Must be set, and the decorative panel 9 must be closed. As a result, the safety switch 57 'is turned on and the reset switch 12 is turned off, and the apparatus 100 is in a so-called "ready" state.

When the power switch 8 is turned on from the "ready" state in step P1 of the flowchart shown in FIG. 15, the apparatus 100 starts operating. In the dust collection unit 3, a voltage of Va = + 3200 V is applied to the ionization line 32, and Vk = − is applied to the counter electrode 33 and the dust collection electrode 34.
A voltage of 6200 V is applied. As a result, ionic wind is generated from the ionization line 32 toward the counter electrode 33 and the dust collecting electrode 34, and positive charges are charged to, for example, dust in the dirty air taken in from the intake port 2A. The dust adheres to the filter 10 on the dust collecting electrode 34 by Coulomb force. The purified air is guided by the acceleration unit 4 and rises.

In the acceleration unit 4, Va is applied to the ionization line 41.
= + 3200 V is applied, and Vk is applied to the opposite electrode 42.
= -6200 V, the ionization line 4
Ion wind from 1 toward the counter electrode 42 is generated. The cleaned air is accelerated by the ion wind and is discharged from the exhaust port 5 to the outside. At this time, negative ions are charged to the cleaned air by the discharge needle 43.

Then, in step P2, the timer circuit 55
The operation time is integrated by the operation. This integration is performed in step P
The process is continued until the power is turned off in step 3. When the power is turned off, the operation time accumulated so far is recorded in the RAM 56. When the power is turned on again, the operation time information D1 is read from the RAM 56, and the operation time information from that point is integrated into the operation time information D1.

As the operation time of the apparatus 100 progresses,
The CPU 54 determines in Step P5 whether the total operation time has elapsed for one week. At this time, C
In the PU 54, the integrated time information D1 from the timer circuit 55
And the replacement time information D2 of the filter 10 set in advance are compared. As a result of the comparison, if the operation time exceeds one week, the process shifts to Step P6, and only one semicircle pattern is displayed as a pixel in the notice display area 7B of the LCD display unit 7 (see FIG. 12A). .

Thereafter, the CPU 54 determines in step P7 whether the semicircular pattern has been displayed for the fourth line. If it is not the fourth display, the counting of the driving time for a new week is started in step P8. And step P
Returning to 2, the timer circuit 55 continues to accumulate the operation time.

If the display is the fourth display in step P7, the LCD display unit 7 displays a warning in step P9. In the warning display, as shown in FIG. 12D, when four semicircular patterns are displayed as pixels, the pixel display blinks from the central semicircular pattern to the outer peripheral semicircular pattern. Thus, it is possible to alert the user that the time for replacing the filter 10 has come.

Here, when the user opens the decorative panel 9 from the cabinet 2 to replace the dirty filter 10 with a clean filter, the safety switch 57 'is turned off. Thereafter, when the electrode holder 31 with the dust collecting electrode 34 is moved down to the open window side, the reset switch 12 is turned on in Step P10. By this turning on, the operation integrated information D1 in the timer circuit 55 is reset in step P11.

Then, the user sets a new filter 10 on the dust collecting electrode 34 shown in FIG. 14, and closes the decorative panel 9. As a result, the safety switch 57 'is turned on, the reset switch 12 is turned off, and the state becomes "ready", and the above-described flowchart is repeatedly executed.

As described above, in the present embodiment, when the filter replacement time has not come, it is possible to perform pixel display using a part of the notice display area 7B, such as the elapsed time from the start of operation. In addition, when the filter replacement time has come, the warning blinking can be performed in four semicircular patterns or the like using all the notice display areas 7B, so that the user can be further alerted to the filter replacement time. .

Therefore, when the filter is replaced, the filter 1
It is possible to check the stock of zero or the like in advance, and it is no longer necessary to promptly notify the user of filter replacement and check the stock as in the conventional method.

In the present embodiment, 4
The case where the warning display of the semicircular pattern of the book is displayed has been described. However, the present invention is not limited to this.
It goes without saying that the present invention includes modifications such as

In this embodiment, notches 42A to 42
Although the case where D is provided in the acceleration unit 4 has been described,
The dust collecting unit 3 may be provided. Generation of ozone in the dust collection unit 3 is suppressed.

In the present embodiment, the case where four notches 42A to 42D are provided in the counter electrode 42 has been described. .

In this embodiment, a case has been described in which one set of dust collection units 3 is provided below the acceleration unit 4. However, a plurality of dust collection units 3 are arranged in parallel or in series below the acceleration unit 4. You may. Even more dust can be collected.

[0085]

As described above, according to the present invention, the absolute value of the negative voltage applied between the discharge line and the ground is compared with the positive voltage applied between the counter electrode and the ground. The voltage is applied to each electrode so that the absolute value of is larger.

With this configuration, it is possible to increase the negative voltage applied between the counter electrode and the ground while securing a potential difference required for generating the flow of ions between the discharge line and the counter electrode. Therefore, generation of negative ions can be increased. At the same time, since the positive voltage applied between the discharge wire and the ground can be suppressed, the amount of ozone harmful to the human body can be reduced.

Therefore, the present invention is extremely suitable for application to an ion-type air cleaning device that requires collection of fine dust.

[Brief description of the drawings]

FIG. 1 is an ion-type air cleaning device 10 as an embodiment.
FIG. 2 is a perspective view showing a configuration of a No. 0.

FIG. 2 is a cross-sectional view illustrating a configuration of the air cleaning device 100 when a filter is replaced.

FIG. 3 is a cross-sectional view illustrating a configuration of the air cleaning device 100 when a cabinet is closed.

FIG. 4 is an enlarged sectional view around an axis showing a state of wiring.

FIG. 5 is a perspective view showing a configuration of the acceleration unit 4.

FIG. 6 is a side view showing a configuration of a cutout portion of a counter electrode 42.

FIG. 7 is a top view showing a configuration of a discharge needle and a ground plate.

FIG. 8 is a perspective view showing an example of supplying a voltage applied to each electrode.

FIG. 9 is a block diagram showing a configuration of a control circuit 200 of the air cleaning device 100.

FIG. 10 is a cross-sectional view illustrating a configuration of the air cleaning device 100 when a cabinet is opened.

FIG. 11 is a top view showing the configuration of the LCD display unit 7;

FIG. 12 is a top view showing a display example of a notice display area 7B.

FIG. 13 shows a reset switch 12 of the air cleaning device 100.
It is sectional drawing which shows the attachment position of.

FIG. 14 is a cross-sectional view showing the operation of the air cleaning device 100.

FIG. 15 is a flowchart of a filter replacement notice of the air cleaning device 100.

[Explanation of symbols]

 2 Cabinet 3 Dust collection unit 4 Acceleration unit 7 LCD display unit 10 Filter 31 Electrode holder 32, 41 Ionization wire (discharge wire) 33, 42 Counter electrode 34 Dust collection electrode 35 Rotation axis

Claims (7)

[Claims] 1. A discharge line to which a positive voltage is applied, and a counter electrode to which a negative voltage is applied at a position facing the discharge line, wherein a potential difference between the discharge line and the counter electrode is provided. In the ion-type air cleaning device that generates a flow of ions and collects dust by charging the dust in the gas with a positive or negative charge, the positive polarity voltage applied between the discharge wire and the ground is A voltage is applied to each electrode so that the absolute value of the negative voltage applied between the counter electrode and the ground is larger than the absolute value. Air purifier. 2. When a potential difference required to generate a flow of ions between the discharge line and the counter electrode is at least about 10,000 V, a positive voltage Va applied to the discharge line is Va ≦ + 40.
00V, a negative voltage V applied to the counter electrode.
2. The ion-type air purifying apparatus according to claim 1, wherein k is Vk≤-6000V. 3. A discharge line for collecting dust and a voltage for applying a positive polarity for generating a flow of ions and applying a positive or negative charge to dust in a gas to collect the dust. A dust-collecting unit having a dust-collecting counter electrode, to which a positive voltage for accelerating the gas from the dust-collecting unit is applied; An accelerating unit having an accelerating counter electrode for accelerating, wherein an absolute value of a voltage applied between the discharging wire for dust collection and the ground is set to A voltage is applied to each of the electrodes so that the absolute value of the voltage applied between them becomes larger, and the absolute value of the voltage applied between the discharge wire for acceleration and the ground is increased with respect to the absolute value of the voltage. The absolute value of the voltage applied between the counter electrode for Ion type air cleaning device, characterized in that it is adapted to apply a voltage to each of the electrodes so that. 4. The ion-type air cleaning device according to claim 3, wherein a discharge needle is attached to the acceleration counter electrode, and the discharge needle is maintained at the same potential as the counter electrode. 5. An ion-type air cleaning apparatus according to claim 4, wherein an electrode portion having the same potential as that of the ground is provided at a position facing said discharge needle. 6. The ionic air cleaning device according to claim 3, wherein the discharge needle is provided to be offset to one of the side ends of the counter electrode. 7. A positive voltage Va applied to the discharge line is Va = + 32 when a potential difference required to generate a flow of ions between the discharge line and the counter electrode is at least about 9400 V.
00V, a negative voltage V applied to the counter electrode.
4. The ionic air cleaning apparatus according to claim 3, wherein k is Vk = -6200V.