JP2012045473A - Dust collecting filter, natural air supply opening using the same and dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collecting filter without requiring a high voltage power source which prevents short circuit as defects by having two electrodes having a potential difference of a conventional electrical dust collector while preventing contamination from a blowout port by charged dust and generating ozone.SOLUTION: There is provided the dust collecting filter, in which a corrugated plate-like insulating plate 3 is put on a plate-like electrode plate 2 so that a longitudinal cross section becomes waveform, wound as roll-like and grounded the plate-like electrode plate 2. A natural air supply opening using the dust collecting filter and a dust collector are also provided.

Description

  The present invention relates to a dust collection filter that collects atmospheric dust in an indoor space, a natural air inlet, and a dust collector using the same.

  Conventionally, this type of dust collecting filter or dust collecting device is provided with a charging unit that ionizes air molecules mainly by corona discharge and charges dust contained in the air as described in Patent Document 1 in the previous stage. The electrode plate A and the electrode plate B to which different voltages are applied are known as an electric dust collection unit in which a dust collection section in which a stack is provided in parallel with the ventilation direction and a space is provided. By providing air blowing means such as a blower upstream or downstream of the dust collector, air is sent in the order of the charging unit and the dust collecting unit, and the dust in the air charged by the charging unit is the electrode plate A of the dust collecting unit. The electrode plate A or the electrode plate B receives the force of the electric field provided between the electrode plate B and the electrode plate B.

  The electric dust collection unit will be described below with reference to FIG.

  As shown in FIG. 9, the electrostatic dust collection unit is configured by the charging unit 101 and the dust collection unit 102 provided on the downstream side thereof. The charging unit 101 is configured by laminating a discharge electrode plate 104 having a spine-shaped tip 103 that is parallel to the ventilation direction and a counter electrode plate 105 so as to be parallel to each other at a predetermined interval. By applying a high voltage to the discharge electrode plate 104 and a voltage of 0 kV to the counter electrode plate 105, a non-uniform electric field is provided at the spine-shaped tip 103 to generate a corona discharge. When corona discharge occurs, air molecules are ionized, and air ions having a charge are produced. Dust is charged by air ions adhering to the dust in the air.

  The dust collecting unit 102 is configured by stacking the electrode plate A106 and the electrode plate B107 in parallel with the ventilation direction and providing a space. For example, a high voltage is applied to the electrode plate A106 and a voltage of 0 kV is applied to the electrode plate B107 by the high voltage power source 108, and an electric field is formed between the electrode plate A106 and the electrode plate B107. The dust charged by the charging unit is introduced between the electrode plate A106 and the electrode plate B107 of the dust collecting unit and collected in either the electrode plate A106 or the electrode plate B107.

Japanese Patent No. 3254134

  Since the dust collector described in Patent Document 1 has two electrodes having a potential difference, a short circuit such as a spark is caused, and ozone is generated by corona discharge, which makes it difficult to ensure stable and safe operation. Have.

  Therefore, the dust collection filter of the present invention aims to ensure a stable and safe operation without causing a short circuit and without generating ozone.

  In order to achieve this object, the dust collection filter of the present invention has a corrugated insulating plate placed on a flat electrode plate so that the longitudinal cross section thereof is corrugated and wound in a roll shape. The intended purpose is achieved by grounding the electrode plate.

  Since the dust collection filter of the present invention does not have two electrodes having a potential difference, it does not cause a short circuit between the electrode plate and the insulating plate, and further does not charge the dust, thus preventing contamination after the outlet due to the charged dust and ozone. Stable and safe operation can be ensured without generation.

The block diagram which shows the dust collection filter of Embodiment 1 of this invention Diagram showing the dust collection principle of the dust collection filter (A) The block diagram which shows the upper surface of the same laminate electrode, (b) The block diagram which shows the cross section of the same laminate electrode The block diagram which shows the dust collection filter of Embodiment 2 The block diagram which shows the dust collection filter of Embodiment 3 The block diagram which shows the upper surface of the dust collection filter of Embodiment 4 The block diagram which shows the natural air inlet of Embodiment 5 The block diagram which shows the dust collector of Embodiment 6 The block diagram which shows the dust collector shown in patent document 1

  Hereinafter, the present embodiment will be described with reference to the drawings.

(Embodiment 1)
A configuration diagram of the dust collection filter 1 according to claim 1 of the present invention is shown in FIG. 1, and a dust collection principle of the dust collection filter 1 is shown in FIG.

  The dust collecting filter 1 has a structure in which a pair of flat electrode plates 2 and a corrugated insulating plate 3 are overlapped and wound in a roll shape, and the flat electrode plate 2 is connected to the ground. Yes.

  And as shown in FIG. 2, the triangular-shaped ventilation path 5 which used both as the partition is formed. Air is introduced into the dust collection filter 1 along the air entry direction 4 and passes through the ventilation path 5. At this time, the corrugated insulating plate 3 is naturally charged by contact with air.

  Since a voltage of 0 kV is applied to the flat electrode plate 2 by being connected to the ground, a potential difference is generated between the charged corrugated insulating plate 3 and, for example, an arrow shown in FIG. An electric field as shown is formed inside the triangular ventilation path 5. Dust contained in the air is polarized by receiving the action of the electric field, moves along the electric field, adheres to the wall surface of the ventilation path 5 and is collected.

  The dust collecting filter 1 uses an electric field generated by natural charging of a member as a dust collecting principle, and does not use corona discharge necessary for charging dust. Accordingly, it is difficult to obtain high dust collection performance, but sufficiently high dust collection performance can be obtained if the air passing velocity is low.

  In addition, since no corona discharge is used, the dust is not excessively charged, and after passing through the dust collecting filter 1, the dust does not adhere to the wall or the like. Also, ozone that is harmful to the human body is not generated. In addition, since a high voltage power source necessary for causing corona discharge or artificially generating an electric field is not required, power is not consumed, and the structure can be simplified at low cost.

  Here, as a member which can be used for the flat electrode plate 2, a plate made of a conductive material such as metal can be cited. As a cheaper and stronger one, a resin film that is not shown in the figure but is made conductive by applying a conductive paint containing carbon, metal powder, metal oxide particles, etc. can be used. .

  Further, as shown in FIG. 3, if a laminated electrode plate 8 in which a metal foil 6 is covered with an insulating film 7 such as a resin film is used, higher strength can be obtained. The corrugated insulating plate 3 has an insulating property such as a polyolefin resin such as polyethylene or polypropylene, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a polyamide resin such as nylon 6 (six), or a polystyrene resin. It is possible to use a resin film. In particular, an unstretched polybutylene terephthalate resin film is easy to process into a corrugated sheet and is easy to make.

  Although not shown in the figure, higher dust collection performance can be obtained by coating the entire dust collection filter 1 with a silicone polymer or fluororesin having a property of being easily charged. Specifically, this can be achieved by immersing the silicone polymer in a silicone polymer solution dissolved in a hydrocarbon solvent such as cyclohexane and drying. As the silicone polymer, for example, a one-component condensation curable RTV resin can be used. The one-component condensation-curing RTV resin also has an adhesive function, and a block-like strong dust collecting filter can be obtained by immersing and drying the entire dust collecting filter 1 which is overlapped and wound in a roll shape.

  Another method is to immerse the entire dust collection filter 1 in a fluororesin coating solution obtained by adding an acrylic emulsion solution to a PTFE dispersion, which is a dispersion of polytetrafluoroethylene (PTFE) fine particles, and to dry the silicone. The effect which improves dust collection performance like a polymer is acquired.

(Embodiment 2)
The block diagram of the dust collection filter 1 of Claim 2 of this invention is shown in FIG. Although it is structurally substantially equivalent to the dust collection filter 1 shown in the first embodiment, a high voltage can be applied by a high voltage power source 9 connected to the flat electrode plate 2. When a high voltage is applied to the flat electrode plate 2, electric charges are supplied to the corrugated insulating plate 3 that is in contact with the flat electrode plate 2 and charged.

  The high-voltage power supply 9 has a mechanism for boosting the input voltage by electronic components such as a transformer and a resistor and outputting a high voltage. When the input voltage is 0 V, the output voltage is also 0 V, that is, connected to the high-voltage power supply 9. The flat electrode plate is grounded. When the input voltage is set to 0V, the plate-like electrode plate 2 connected to the high-voltage power supply 9 becomes 0V and the electric charge disappears. However, since the corrugated plate-like insulating plate 3 is insulative, it remains charged. A potential difference is generated between the two electrode plates 2 and an electric field can be created inside the ventilation path 5 formed by the two. The electric field causes the dust to be polarized by itself, move along the electric field, adhere to the wall surface of the ventilation path 5 and be collected. And it becomes possible to always form the said electric field by applying a voltage intermittently to the flat electrode plate 2, and can always obtain high dust collection performance.

  Since the dust collection filter 1 of this embodiment also has a structure that does not charge the dust by causing corona discharge, the dust does not adhere to the wall or the like downstream from the dust collection filter 1 and is not contaminated, and ozone is not generated. Since the high-voltage power supply 9 is necessary, the structure is somewhat complicated, but the power consumption is small because no voltage is constantly applied. Therefore, the high voltage power source 9 can be driven for a long time even with a dry cell, and there is a feature that no power supply work for input is required.

  Moreover, if the laminated electrode plate 8 as shown in FIG. 3 is used, the metal foil 6 to which a high voltage is applied is insulated, so that it is possible to prevent a person from touching and receiving an electric shock. 3A is a top view of the laminated electrode plate 8 as viewed from above, and FIG. 3B is a cross-sectional view.

  Similarly to the dust collection filter 1 shown in the first embodiment, higher dust collection performance can be obtained by coating with a material that is easily charged, such as silicone polymer or fluorine resin.

(Embodiment 3)
The block diagram of the dust collection filter 1 of Claim 3 of this invention is shown in FIG. A flat resin film 10 made of nylon and a corrugated resin film 11 made of polyester or polyolefin are overlapped and wound into a roll shape. Nylon resin tends to be positively charged, and polyester and polyolefin resin tend to be negatively charged. When air flows through the ventilation path formed by stacking materials with different polarities that are easily charged, the flat resin film 10 made of nylon has a positive polarity, and the corrugated resin film 11 made of polyester or polyolefin becomes The negative polarity is charged, and a potential difference is generated between the two. Therefore, an electric field is formed inside the ventilation path 5. The dust passing through the ventilation path 5 in which the electric field is formed is polarized by itself, moves along the electric field, and is collected by adhering to the wall surface forming the ventilation path.

  Since it is a structure that does not charge the dust by causing corona discharge, the dust does not adhere to the wall or the like downstream from the dust collecting filter, and no ozone is generated. In addition, since the high-voltage power supply 9 is not necessary, it can be inexpensive and the structure can be simplified.

  Here, even when the material of the flat resin film 10 made of nylon is changed to polyester or polyolefin, and the corrugated resin film 11 made of polyester or polyolefin is changed to nylon, the material is reversed. Since the shape of each resin is simply reversed, a dust collection filter having the same effect can be obtained.

(Embodiment 4)
FIG. 6 shows a top view of the dust collection filter 1 in which the space formed by the electrode plate and the insulating plate is a ventilation path, and the ventilation path is inclined with respect to the end surfaces of the electrode plate and the insulating plate. The ventilation path 5 is actually hidden and cannot be seen, but is represented by a solid line for easy understanding. Although the corrugated insulating plate 3 and the corrugated resin film 11 made of nylon, polyester or polyolefin are not shown in the drawing, the corrugated plate is processed by passing through two meshing gears. By using a helical gear instead of this gear, it is possible to perform processing in which the corrugated plate is not perpendicular to the longitudinal direction but is oblique. By performing such processing, an air passage 5 that is inclined with respect to the opening surface is obtained. By making the ventilation path 5 diagonal, a long ventilation path 5 having the same depth dimension can be obtained, and the dust collection performance can be improved.

(Embodiment 5)
The block diagram of the natural air inlet 12 carrying the dust collection filter 1 in any one of Claims 1 thru | or 7 is shown in FIG. In a room equipped with a ventilation facility having an exhaust function, an air supply hole 15 is provided in the wall 14 for introducing outdoor air into the room. The natural air inlet 12 is composed of a main body case 16, a decorative panel 13, and a dust collection filter 1, and is an interior member that is attached from the indoor side so as to fit into the air inlet 15. As shown in FIG. 7, outdoor air is introduced into the room along the air entry direction 4. The natural air supply port 12 is attached so as to be inserted into the air supply hole 15, and the dust collection filter 1 of the present invention is mounted therein. The decorative panel 13 facing the room side can be removed, and the dust collecting filter 1 can be removed. The removed dust collecting filter 1 can be cleaned by washing with water. For example, when ventilation is performed 0.5 times / hour in a room equivalent to 6 tatami mats (23 m3), if the dust collection filter has a diameter of 100 mm, the passing air speed of outdoor air introduced is considerably low at 0.4 m / s. Submicron fine dust can be collected with high dust collection performance. Useful dust collection filter that can collect submicron dust at a high rate, has low pressure loss due to its open structure, does not generate ozone, does not require a high-voltage power supply, and can be washed and used many times. 1 can be obtained.

(Embodiment 6)
The block diagram of the dust collector 17 which mounts the dust filter 1 in any one of Claims 1 thru | or 7 is shown in FIG. The dust collector 17 includes a main body case 19, a dust collection filter 1, and a blower unit 18. Air is taken into the dust collector 17 by the blower unit 18, and the air passes through the dust collector filter 1. Yes.

  The air blowing means may be in any form as long as it can convey air, such as a rotating blade, for example, a blower having a sirocco fan or a propeller fan, and is provided on either the upstream side or the downstream side of the dust collecting filter. The same effect can be obtained.

  Useful dust collection filter that can collect submicron dust at a high rate, has low pressure loss due to its open structure, does not generate ozone, does not require a high-voltage power supply, and can be washed and used many times. 1 can be obtained.

  As described above, the dust collection filter of the present invention is a renewable dust collection filter that can collect submicron fine dust at a high rate just by placing it, and is expected to be used as an air cleaning device that can greatly contribute to the improvement of indoor air quality. It can be done.

  In addition, the natural air inlet equipped with the dust collection filter of the present invention collects dust in the air that enters the room from the outside during ventilation, and can maintain high indoor air quality. It can be expected to be used greatly as an improved ventilation member.

  Moreover, the dust collector equipped with the dust filter of the present invention can be expected to be used as a safe and energy-saving air purifying device.

DESCRIPTION OF SYMBOLS 1 Dust collection filter 2 Flat electrode plate 3 Corrugated insulating plate 4 Air inflow direction 5 Ventilation path 6 Metal foil 7 Insulating film 8 Laminated electrode plate 9 High voltage power supply 10 Nylon flat resin film 11 Polyester or Corrugated resin film made of polyolefin 12 Natural air supply port 13 Cosmetic panel 14 Wall 15 Air supply hole 16 Body case 17 Dust collector 18 Air blower 19 Body case

Claims (10)

  A dust collecting filter, wherein a corrugated insulating plate is placed on a flat electrode plate so that the cross section in the longitudinal direction is corrugated and wound in a roll shape, and the electrode plate is grounded.   2. The dust collecting filter according to claim 1, wherein a voltage is intermittently applied to the electrode plate.   3. The dust collection filter according to claim 1, wherein the electrode plate is a nylon resin film, and the insulating plate is a polyester or polyolefin resin film.   3. The dust collecting filter according to claim 1, wherein the electrode plate is a resin film made of polyester or polyolefin, and the insulating plate is a resin film made of nylon.   3. The dust collecting filter according to claim 1, wherein the electrode plate is formed by applying a conductive paint to a resin film.   3. The dust collecting filter according to claim 1, wherein the electrode plate is a metal plate coated with a resin film.   The air collecting passage according to claim 1, wherein a space formed by the electrode plate and the insulating plate is a ventilation path, and the ventilation path is inclined with respect to the end surfaces of the electrode plate and the insulating plate. Dust filter.   8. The dust collecting filter according to claim 1, wherein the entire surface is coated with a silicone polymer or a fluororesin.   9. A natural air inlet comprising a decorative panel, a main body case, and a dust collecting filter, wherein the dust collecting filter is the dust collecting filter according to any one of claims 1 to 8.   9. A dust collecting apparatus comprising a main body case, a dust collecting filter, and a blowing means, wherein the dust collecting filter is the dust collecting filter according to claim 1.

Images