JPH0810650A - Air cleaner - Google Patents

Abstract

PURPOSE:To elevate electric voltage of an electric loading part and to catch charged dust efficiently by laminating alternately a dust precipitation electrode consisting of an activated carbon loaded with high electric voltage and a dust precipitation electrode consisting of an activated carbon being brought into contact with an earth electrode through a spacer made of nonwoven fabric. CONSTITUTION:In an air cleaner 1, an electric loading part 5 consisting of an electrically discharging electrode 12 and a facing electrode 11 connected with the earth side is arranged on the upstream side of an air path 3. On the other hand, on the downstream side of an electric loading part 5, a dust collecting part 6 is arranged. In this case, the dust collecting part 6 is constituted by laminating alternately the first dust collecting electrode 7 consisting of an activated carbon loaded with a high electric voltage and the second dust collecting electrode 9 consisting of an activated carbon being brought into contact with an earth electrode through a spacer 10 consisting of a non-woven fabric. Ozone is caught and decomposed thereby to elevate the electric voltage of the electric loading part 5 to perform efficiently to catch electrostatically charged dust. In addition, the life is prolonged by attaching a polarity switching means for switching each polarity of both dust collecting electrodes 7 and 9 to the cleaner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a home air cleaner,
The present invention relates to an air cleaning device mounted on a home air conditioner and a vehicle air conditioner.

[0002]

2. Description of the Related Art A conventional air cleaning apparatus, as disclosed in, for example, Japanese Patent Application Laid-Open No. 3-270744, has a pre-filter disposed upstream in a suction air passage (air conditioning duct, etc.), a charging section, And a dust collector.

The charging section is composed of a discharge electrode to which a high voltage is applied and a counter electrode connected to the ground side. Corona discharge is generated between the discharge electrode and the counter electrode and passes between the electrodes. Electrify dust etc.

The dust collecting portion (collector portion) has a high-voltage side electrode connected to the float electrode having a predetermined high voltage induced by a bias voltage induced by the discharge electrode, and a ground electrode connected to the ground side. It is configured by and to adsorb and trap dust and the like charged in the charging section between these electrodes.

[0005]

However, the conventional air cleaning apparatus has a problem that the voltage of the charging section cannot be increased because of its low ozone decomposing ability. Further, when an ozone decomposing filter is provided in order to improve the ozone decomposing ability, the size of the air cleaning device becomes large, which causes a problem of cost increase.

[0006] Therefore, the present invention is to provide an air purifying apparatus having improved dust collecting ability and ozone decomposing ability without increasing the size of the apparatus itself.

[0007]

SUMMARY OF THE INVENTION Therefore, the air cleaning apparatus of the present invention is arranged on the upstream side of the air passage through which the intake air passes, and is opposed to the discharge electrode to which a high voltage is applied and the ground side. In an air cleaning device configured by a charging unit formed of electrodes and a dust collecting unit arranged on the downstream side of the charging unit, the dust collecting unit is a first dust collecting electrode made of activated carbon to which a high voltage is applied. And the second dust collecting electrode made of activated carbon that comes into contact with the ground electrode are alternately laminated via the spacer made of non-woven fabric (claim 1).

Further, it is preferable that a polarity switching means for switching the polarities of the first dust collecting electrode and the second dust collecting electrode is provided (Claim 2), and the material of the nonwoven fabric is preferably polypropylene (Claim 2). Item 3).

Furthermore, it is preferable that the first dust collecting electrode and the second dust collecting electrode are flat and the spacers are wavy (claim 4), and conversely, the first dust collecting electrode and the second dust collecting electrode are (2) The dust collecting electrode may have a wavy shape, and the spacer may have a flat shape (claim 5).

Furthermore, it is preferable that a film made of an insulating member is formed on the upstream side portions of the air passages of the first dust collecting electrode and the second dust collecting electrode (claim 6). A film made of an insulating member may be formed on the upstream side and the downstream side of the air passage of the electrode and the second dust collecting electrode.

[0011]

Therefore, according to the present invention, the dust collecting portion has the first dust collecting electrode made of activated carbon which is in contact with the high voltage electrode to which the high voltage is applied, and the second dust collecting electrode made of activated carbon which is in contact with the ground electrode. By alternately forming and with a spacer made of a non-woven fabric, ozone can be captured and decomposed by the activated carbon used for the electrode, and the voltage of the charging part can be increased. Can achieve the task.

Further, since the electrodes on the high voltage side and the ground side are switched by the polarity switching means, the electrodes for collecting the dust in the dust collecting portion can be switched, and the life of the dust collecting portion can be extended.

Further, since the non-woven fabric is made of polypropylene which is easily charged, a negative charge is generated on the high-voltage electrode side of the non-woven fabric, so that dust charged positively in the charging portion can be attracted and adsorbed and captured.

Furthermore, the first dust collecting electrode and the second dust collecting electrode are flat and the spacers are wavy, so that a short circuit between the first dust collecting electrode and the second dust collecting electrode is reliably prevented. On the contrary, by making the first dust collecting electrode and the second dust collecting electrode wavy and making the spacer flat, the dust collecting area of the first dust collecting electrode and the second dust collecting electrode can be widened. can do.

Further, by forming a film made of an insulating member on the upstream side portions of the air passages of the first dust collecting electrode and the second dust collecting electrode, dust adhered to the upstream end portions causes a gap between the electrodes. Of the first dust collecting electrode and the second dust collecting electrode can be further improved by forming a film made of an insulating member on the upstream and downstream side portions of the air passage of the first dust collecting electrode and the second dust collecting electrode. is there.

[0016]

Embodiments of the present invention will be described below.
The air purification apparatus 1 shown in FIG. 1 generates a voltage on one electrode of the prefilter 4, the charging unit 5, the dust collecting unit (collector unit) 6, and the collector unit 6 on the air passage 3 formed by the duct 2. Float electrode 8 is provided for the purpose. Further, the air purifying apparatus 1 includes an operation panel 13, a control unit 14 that operates each control device according to an instruction from the operation panel 13, a high voltage power supply 15 that outputs a high voltage according to an instruction from the control unit 14, and a polarity switching means. 16 are included.

The pre-filter 4 is for removing coarse dust from the air sucked by an air suction means (not shown), for example, a sirocco fan or a blade fan rotated by a DC electric motor such as a brushless motor. Is formed by.

The charging unit 5 includes a discharge electrode 12 connected to the high voltage side (about 4 to 5 KV) of the high voltage power source 15, and a counter electrode 11 arranged so as to sandwich the discharge electrode 12 at a predetermined interval. The corona discharge is generated between the discharge electrode 12 and the counter electrode 11. As a result, dust contained in the air passing between the electrodes 12 and 11 is positively charged. Further, between the electrodes, ozone is generated by a chemical reaction of oxygen contained in the passing air. still,
This ozone has a deodorizing effect.

A float electrode 8 is provided on the downstream side of the charging section 5.
The float electrode 8 is connected to the first dust collecting electrode 7 or the second dust collecting electrode 9 selected by the polarity switching means 16 described below. This float electrode 8
Will float between the discharge electrode 12 and the electrode on the ground side selected by the polarity switching means 16, so that the voltage between the high-voltage power supply voltage and ground is approximately 2 to 2.
Will have 3 KV. As a result, the first dust collecting electrode 7 or the second dust collecting electrode 9 of the dust collecting portion 6 which is automatically selected by the polarity switching means 16 connected to the float electrode 8 has the above high voltage or a voltage of 2 to 3 KV. Will have. In this embodiment, the float electrode 8
Although the predetermined high voltage is applied to the dust collecting section 6 by providing the above, the high voltage may be directly supplied from the high voltage power supply 15 to the dust collecting section 6.

The dust collecting portion 6 is shown in FIGS. 2 (a), 2 (b) and 3
As shown in FIG. 1, in the frame body formed by the upper, lower, left and right frames 61, 62, 63, 64, the first electrode electrically connected to the electrode (first electrode) 65 mounted in the left frame 63. Dust collecting electrode 7 and electrode (second electrode) 66 mounted in the right frame 64
The second dust collecting electrode 9 electrically connected to the second dust collecting electrode 9 and the spacer 10 interposed between the first dust collecting electrode 7 and the second dust collecting electrode 9 are sequentially laminated.

The first dust collecting electrode 7 is formed of activated carbon paper or activated carbon sheet, and is in contact with the first electrode 65 fitted in the left frame 63 and abutting on the first electrode 65 fitted in the left frame 63. The dust collecting portion 7b and the holding portion 7c held by the cut 64a of the right frame 64 are provided. Further, similarly to the first dust collecting electrode 7, the second dust collecting electrode 9 is formed of activated carbon paper or activated carbon sheet, and is engaged with the right frame 64 and the second electrode 66 fitted in the right frame 64. The abutting electrode 9a abutting against the dust collecting portion 9b, and the holding portion 9c held by the cut 63a of the left frame 63.

The spacer 10 is formed of a non-woven fabric made of polypropylene, such as paper fiber, natural cloth fiber, synthetic fiber, synthetic resin, etc., especially polypropylene, and the first dust collecting electrode 7 and the second dust collecting electrode 9 are formed. It will be placed between and. By this spacer 10, a predetermined space (for example, 1 to 20) is provided between the first dust collecting electrode 7 and the second dust collecting electrode 9.
mm, preferably 2-3 mm). The spacer 10 has a predetermined thickness and has the first thickness.
Although it may be arranged between the first and second dust collecting electrodes, in the present embodiment, the first and second dust collecting electrodes are formed in a flat shape by forming the spacer 10 in a wave shape. It is arranged so as to be interposed between the electrodes 7 and 9. As a result, the predetermined interval can be maintained with a small amount of material.

The polarity switching means 16 has a first switch 17 and a second switch 18 which are double contact switches.
A base terminal 17c of the first switch 17 is connected to a terminal 16c connected to the float electrode 8, and the first terminal 17c
a is connected to the first terminal 16a connected to the first electrode terminal 67 of the first electrode 65, and the second terminal 17b is connected to the second terminal 16a.
Second terminal 16 connected to second electrode terminal 68 of electrode 66
It is connected to b. In addition, the base terminal 1 of the second switch 18
8c is grounded, the first terminal 18a is connected to the second terminal 16b connected to the second electrode terminal 68 of the second electrode 66, and the second terminal 18b is the first electrode terminal of the first electrode 65. It is connected to the first terminal 16a connected to 67. In the first stage, the base terminal 17c and the first terminal 17a of the first switch 17 are connected by the contact terminal 17d, and the base terminal 18c and the first terminal 18a of the second switch 18 are connected by the contact terminal 18d. It Accordingly, in the first stage, the float electrode 8 is
And the first dust collecting electrode 7 are communicated with each other, and the second dust collecting electrode 9
Is grounded. The contact terminal 1 of the first switch 17
7d and the contact terminal 18d of the second switch 18 are
The control unit 14 is connected via d and is switched at the same time by a signal from the control unit 14.

Therefore, in the air cleaning apparatus 1, when the switch by the operation panel 13 is turned on, the air suction means (not shown) by the control unit 14 is activated to suck the air into the air passage. The air first passes through the pre-filter 4 to remove coarse dust, and further passes through the charging unit 5 to positively charge the dust contained in the air. Further, in the charging section 5, oxygen in the passing air chemically reacts to generate ozone. In addition, this ozone has a deodorizing bactericidal action.

Further, since a high voltage is applied to the discharge electrode 12 of the charging section 5, a high voltage (about 2 to 3 KV) which is substantially intermediate between the high voltage and the ground is generated on the float electrode 8. Therefore, the high voltage (about 2 to 3 KV) is also supplied to the first dust collecting electrode 7 of the dust collecting section 6. First for this
An electric field is generated between the dust collecting electrode 7 and the second dust collecting electrode 9,
The dust positively charged by the charging section 5 is attracted to the second dust collecting electrode 9 and adsorbed and captured by the second dust collecting electrode 9.

Further, as shown in FIG. 4, since the spacer 10 made of a non-woven fabric is made of a material which is easily charged (paper fiber, natural cloth fiber, synthetic fiber, synthetic resin fiber, especially polypropylene), the grounding is performed. The positive charge is attracted to the second dust collecting electrode 9 (ground side), and the negative charge is opposite to the first dust collecting electrode 7 (high voltage side) connected to the float electrode 8. It will be. For this reason, the positively charged dust is attracted by the negative charges that have moved to the vicinity of the high pressure side of the spacer 10, so that the high pressure side of the spacer 10 has a dust collecting function. Thereby, the dust collecting effect of the whole dust collecting portion 6 can be further improved.

Further, after the above operation is continued for a predetermined time, or when it is determined that the dust collecting effect at the second dust collecting electrode 9 is lowered, a signal from the control unit 14 causes the first switch 17 and The contact terminals 17d and 18d of the two switches 18 are switched, the base terminal 17c and the second terminal 17b of the first switch 17 are communicated with each other,
The base terminal 18c and the second terminal 18d of the second switch 18
Are communicated.

As a result, the first dust collecting electrode 7 is grounded, the second dust collecting electrode 9 is connected to the float electrode 8 to supply a high voltage, and the first dust collecting electrode 7 has a positive voltage. It is possible to adsorb and capture the charged dust.
In addition, since the position of the negative charges in the spacer 10 is reversed due to the change in polarity, the dust collecting effect in the spacer 10 can be continued.

From the above, it is possible to switch the electrode for collecting dust from the suction and capture of dust at the second dust collecting electrode 9 to the suction and capture of dust at the first dust collecting electrode 7, so that the dust is collected. The adsorbing and capturing ability of can be continued for a long time.

Further, since the first dust collecting electrode 7 and the second dust collecting electrode 9 are formed of activated carbon paper or activated carbon sheet, deodorization of malodorous components contained in the air generated in the charging section 5 and bacteria / microorganisms Sterilized ozone can be adsorbed and decomposed with activated carbon. Thus, since the activated carbon that surely adsorbs and decomposes harmful but useful ozone is used, the voltage of the charging section 5 can be further increased. As a result, the dust collection rate can be improved.

Furthermore, since activated carbon has a large electric resistance, the current flowing through the first and second dust collecting electrodes 7 and 9 can be suppressed, so that the safety of the dust collecting portion can be improved. Have an effect.

Further, in the above-mentioned embodiment, the method of switching the electric circuit by the switch is used as the polarity switching means, but since the dust collecting portion has a symmetrical shape to the left and right, the dust collecting ability is deteriorated after a predetermined time has elapsed. It is possible to reverse the polarities of the first dust collecting electrode 7 and the second dust collecting electrode 9 by reattaching the dust collecting portion so that the left and right sides are reversed by a lamp or the like notifying that. In this case, although it takes extra man-hours to attach the dust collecting portion to the opposite side, there is an effect that the structure can be simplified because it is not necessary to attach an electric circuit.

Further, FIG. 5 shows that the side portions 74, 94 located on the upstream side of the air passage 3 of the first dust collecting electrode 7 and the second dust collecting electrode 9 (the side portions 74, 94 are An upstream side end portion 71, 91, and an upper surface portion 72, 92 and a lower surface portion 73, 93 having a predetermined width from the end portion 71, 91. An insulating film 80 made of a material is formed. The insulating film 80 can be formed by a method of applying the resin material or a method of sticking a tape made of the resin material. As a result, it is possible to prevent a short circuit between the first and second dust collecting electrodes 7 and 9 due to the attachment of the conductive dust to the ends of the first and second dust collecting electrodes 7 and 9.

FIG. 6 shows an insulating film 80 formed on the upstream side portions 74, 94 and the downstream side portions 75, 95 of the first and second dust collecting electrodes 7, 9. . As a result, it is possible to prevent a short circuit between the first and second dust collecting electrodes 7 and 9 due to the adhesion of conductive dust to the ends of the first and second dust collecting electrodes 7 and 9. In addition, the insulation can be further improved, and the first and second
The first and second dust collecting electrodes 7 and 9 can be mounted in the left frame 63 and the right frame 64 in which the electrodes 65 and 66 are arranged without worrying about the directionality of the dust collecting electrodes 7 and 9. Therefore, the workability can be improved.

In the embodiment shown in FIGS. 7 and 8, contrary to the above-mentioned embodiment, the first dust collecting electrode 7 and the second dust collecting electrode 9 are formed in a wavy shape (the wavy first and second dust collecting electrodes 7 and 9). Collecting electrode 7 ',
9 ') and the spacer 10 is formed in a flat shape (the flat spacer is referred to as 10'). As a result, there is an effect that the dust collecting area of the first and second dust collecting electrodes 7'and 9'for collecting dust can be made wider than that of the above-described embodiment. Also in this embodiment, since the charges of the opposite polarity to the electrodes 10 'and 9'abut on the contact portions of the spacer 10' with the first and second dust collecting electrodes 7'and 9 ',
It has a dust collecting effect.

Further, FIG. 9 shows a structure in which the insulating film 80 is formed on the upstream side end portions of the first and second dust collecting electrodes 7 ', 9'. By attaching conductive dust to the ends of the second and the second dust collecting electrodes 7'and 9 ', it is possible to prevent a short circuit between the first and the second dust collecting electrodes 7'and 9'.

Further, the one shown in FIG.
The insulating film 80 is formed on both ends of the dust collecting electrodes 7'and 9 '. As a result, it is possible to prevent a short circuit between the first and second dust collecting electrodes 7'and 9'because conductive dust is attached to the ends of the first and second dust collecting electrodes 7'and 9 '. In addition to the effect of being able to perform, the insulating property can be further improved, and the first and second dust collecting electrodes 7,
Since it can be mounted in the left frame 63 and the right frame 64 in which the electrodes 65 and 66 are arranged without paying attention to the directionality of 9, the workability can be improved. .

[0038]

As described above, according to the present invention, the dust collecting portion is composed of the first dust collecting electrode made of activated carbon which is in contact with the high voltage electrode to which a high voltage is applied, and the activated carbon which is in contact with the ground electrode. By alternately laminating the second dust collecting electrode and the second dust collecting electrode via the spacer made of a corrugated non-woven fabric, ozone can be captured and decomposed by the activated carbon, so that the voltage of the charging portion is increased. Therefore, the dust charged in the charging section can be efficiently captured. Further, by increasing the voltage of the charging section, the amount of ozone generated is increased, so that the odorous component can be decomposed and the bactericidal effect can be enhanced.

Further, by switching the electrode on the high voltage side and the electrode on the ground side by the polarity switching means, it is possible to switch the electrode for collecting dust in the dust collecting portion, so that the life of the dust collecting portion can be extended and running. The cost can be reduced.

Further, since the non-woven fabric of the spacer is made of polypropylene which is easily charged, a negative charge is generated on the high-voltage electrode side of the non-woven fabric, and the dust positively charged in the charging part is attracted to this negative charge and adsorbed. Therefore, the dust collecting effect can be obtained also in the spacer, and thus the dust collecting rate of the whole dust collecting portion can be further improved.

Furthermore, the first dust collecting electrode and the second dust collecting electrode are flat and the spacers are wavy, so that a short circuit between the first dust collecting electrode and the second dust collecting electrode is reliably prevented. It is possible to improve safety. Also, the first
When the dust collecting electrode and the second dust collecting electrode have a wavy shape and the spacer has a flat shape, the dust collecting area of the first dust collecting electrode and the second dust collecting electrode can be widened, and therefore, the dust collecting electrode can be widened. The effect can be improved.

Further, by forming a film made of an insulating member on the upstream ends of the air passages of the first dust collecting electrode and the second dust collecting electrode, dust adhering to the upstream ends of the electrodes can be removed. Since the short circuit of the first dust collecting electrode and the second dust collecting electrode can be prevented.
By forming a film made of an insulating member on the upstream and downstream ends of the air path of the dust collecting electrode, the insulating property can be further improved and the directivity of the first and second dust collecting electrodes can be eliminated. Therefore, the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a schematic configuration of an air cleaning device according to a first embodiment of the present invention.

FIG. 2A is a sectional view showing a structure of a dust collecting portion of the first embodiment, and FIG. 2B is an electric circuit diagram thereof.

FIG. 3 is a cross-sectional view showing a configuration of a dust collecting portion of the first embodiment.

FIG. 4 is an explanatory diagram showing a charge distribution state in the spacer of the first embodiment.

FIG. 5 is a partially enlarged perspective view illustrating an insulating film formed on the upstream side of the first and second dust collecting electrodes of the first embodiment.

FIG. 6 is a partially enlarged perspective view illustrating insulating films formed on both ends of the first and second dust collecting electrodes according to the first embodiment.

FIG. 7 is an electric circuit diagram of a dust collector according to a second embodiment of the present invention.

FIG. 8 is a partially enlarged view of the dust collecting portion of the second embodiment.

FIG. 9 is a partially enlarged perspective view illustrating an insulating film formed on the upstream side of the first and second dust collecting electrodes of the second embodiment.

FIG. 10 is a partially enlarged perspective view illustrating an insulating film formed on both ends of the first and second dust collecting electrodes according to the second embodiment.

[Explanation of symbols]

 1 Air Cleaning Device 2 Duct 3 Air Passage 4 Pre-filter 5 Charging Part 6 Dust Collection Part 7, 7'First Dust Collection Electrode 8 Float Electrode 9, 9'Second Dust Collection Electrode 10, 10 'Spacer 11 Counter Electrode 12 Discharge Electrode 14 Control unit 15 High-voltage power supply 16 Polarity switching means 80 Insulation film

Claims (7)

[Claims] 1. A charging part, which is arranged on the upstream side of an air passage through which intake air passes, is composed of a discharge electrode to which a high voltage is applied and a counter electrode connected to the ground side, and a charging part on the downstream side of the charging part. In the air cleaning device, the first dust collecting electrode made of activated carbon to which a high voltage is applied and the second dust made of activated carbon in contact with the ground electrode are provided.
An air purifying device, characterized in that dust collecting electrodes are alternately laminated via spacers made of non-woven fabric. 2. The air cleaning apparatus according to claim 1, further comprising polarity switching means for switching the polarities of the first dust collecting electrode and the second dust collecting electrode. 3. The air cleaning apparatus according to claim 1, wherein the material of the non-woven fabric is polypropylene. 4. The air cleaning apparatus according to claim 1, wherein the first dust collecting electrode and the second dust collecting electrode are flat and the spacers are wavy. 5. The air cleaning apparatus according to claim 1, wherein the first dust collecting electrode and the second dust collecting electrode have a wavy shape, and the spacer has a flat shape. 6. The air according to claim 4, wherein a film made of an insulating member is formed on a side portion of the first dust collecting electrode and the second dust collecting electrode on an upstream side of an air passage. Cleaning device. 7. The film made of an insulating member is formed on the upstream and downstream side portions of the air passages of the first dust collecting electrode and the second dust collecting electrode, respectively. Air purifier as described.