JP4347837B2 - Electric dust collecting device and air treatment apparatus equipped with the electric dust collecting device - Google Patents

Description

  The present invention relates to an electric dust collection device that removes oily smoke or water vapor generated in a kitchen, and an air treatment apparatus equipped with the electric dust collection device.

In recent years, air treatment apparatuses have been widely used in order to keep the air in buildings and vehicles in a clean state at all times. There are various types of air treatment devices ranging from industrial large devices to household small devices, and the air treatment devices are used alone or mounted inside a device with a blower.
In such an air treatment device, dust is removed by applying a charge to the fine particles in the airflow by corona discharge or the like, and the charged particles are collected by electrostatic force while passing between the electrodes and removed. An electrostatic dust collection device is used.

  An electrostatic precipitator device mounted on a conventional air treatment device is composed of an ionization part and a collector part, and uses a semiconductive resin for the high-voltage electrode of the collector part in order to improve the removal rate of particulates in the airflow. (For example, refer to Patent Document 1).

Japanese Patent No. 2780906 (page 3, FIG. 1, FIG. 2)

  Electric dust collection devices mounted on conventional air treatment devices use semiconductive resin for the high-voltage electrode of the collector section, so they are vulnerable to chemical substances such as oil smoke and chemicals. When used in an environment where chemicals flow in, these adhere to the high voltage electrode, change the composition of the semiconductive resin, reduce the surface resistance, reduce the dust collection performance, and abnormalities such as the occurrence of sparks There has been a problem that a large discharge occurs.

  In order to solve this problem, a method of using a metal plate for the high-voltage electrode of the collector can be considered, but in order to suppress abnormal discharge when using a metal plate, the high-voltage electrode and the dust collecting electrode It is necessary to increase the distance between the electrodes beyond a certain level, and the number of stacked electrodes decreases, so that the dust collection area decreases and the dust collection performance may be deteriorated.

The present invention has been made in order to solve the above-described problems. Even when oil smoke or the like flows in, the dust collection efficiency is hardly lowered due to a change with time, and the electric dust collection that does not cause abnormal discharge. Aim to get a device.
It is another object of the present invention to provide an air treatment apparatus equipped with such an electric dust collection device and having a stable air cleaning function over time.

The electrostatic precipitator of the present invention includes an ionization unit that generates corona discharge between a discharge electrode and a counter electrode to charge oily smoke or water vapor generated in a kitchen in an air stream, and a kitchen charged by the ionization unit. An electric dust collection device in which a collector part for collecting generated smoke or water vapor to a dust collecting electrode by applying a voltage between the high voltage electrode and the dust collecting electrode is arranged in the air passage, A support bar having a U-shaped opening for supporting the high-voltage electrode is formed of the same semiconductive resin, and the support bar is embedded at both ends of the leeward side of the high-pressure electrode air passage. A power supply member for applying a voltage is installed in contact with the inside of the support bar that opens to the leeward side so as not to face the airflow in the wind path.

  The electric dust collection device of the present invention has a high dust collection efficiency and no abnormal discharge by forming the high voltage electrode of the collector part with a semiconductive resin. Since the power supply member is installed on the leeward side of the high-pressure electrode air passage so that the power supply member does not face the airflow in the air passage, even if air containing chemical substances such as oil smoke and water vapor flows in The installation part of the power supply member of the high-voltage electrode has no accumulation of oily smoke, etc., the surface potential of the high-voltage electrode is high, and the current does not flow. Decrease in dust collection efficiency and occurrence of abnormal discharge can be prevented.

Embodiment 1 FIG.
FIG. 1 is a view of the air treatment device according to the first embodiment as viewed from the side, and is a view of the state in which the air treatment device is incorporated in a cabinet equipped with an IH cooking heater as seen from the side of the cabinet 7. . 2 is a view similarly seen from the upper surface side (the upper half of FIG. 2 is an external view seen from the upper surface side, and the lower half is an internal view).
In the air treatment apparatus of the first embodiment, the suction part 1, the electrostatic dust collecting device 3, the deodorizing device 4, the blower 2 (configured by the motor 2a, the rotary blade 2b, etc.) and the blowing part 5 are arranged in this order, and the air path And installed in the cabinet 7. And this air processing apparatus draws in air from the suction part 1 by operation of the air blower 2, and blows out clean air from the blowing part 5 after oil smoke, water vapor removal, and deodorization in the electrostatic dust collection device 3 and the deodorizing device 4, respectively.
The cabinet 7 is box-shaped, and an IH cooking heater 6 is installed on the top thereof. And the suction part 1 stands upright with the opening part facing the IH cooking heater 6 side at the end part on the back side of the upper part of the cabinet 7, and the electrostatic dust collecting device 3 and the deodorizing device connected to this suction part 1 by an air passage 4 and the blower 2 are installed in the upper part in the cabinet 7. Furthermore, the blowing part 5 is installed in the downstream of the air path following the air blower 2. The side air outlet 5 a of the blowout part 5 is provided on the side surface of the upper part of the cabinet 7, and the rear air outlet 5 b is provided on the back side of the upper part of the cabinet 7.

A pan 10 or the like is placed on the IH cooking heater 6, and steam, oily smoke, odor, and the like are generated during cooking.
A metal grease filter 8 is installed in the suction portion 1 to remove water vapor and oil from the sucked foreign matter. In addition, a suction port damper 9 is installed at the air passage entrance to the electric dust collection device 3.
The electrostatic dust collecting device 3 includes an ionization unit that generates corona discharge between a discharge electrode and a counter electrode to charge dust, oily smoke, and the like, which are foreign matter in the air, and dust, oily smoke, and the like charged by the ionization unit. It collects and removes dust and oily smoke.
The deodorizing device 4 is installed downstream of the electrostatic precipitator 3 and is made of a metal oxide such as manganese oxide, iron oxide or copper oxide, a noble metal such as platinum, gold, palladium or rhodium, zeolite or activated carbon. Or the like, or a deodorizing catalyst formed by mixing or adsorbing chemical adsorbents in a honeycomb or corrugated form. The deodorizing catalyst itself is a foam or a granular material, and is formed into a honeycomb shape or a corrugated shape by being attached to, or attached to, a support. The deodorizing device 4 removes odor.
From the blowing unit 5, dust, oily smoke, water vapor and the like, which are foreign matters, are removed by the electric dust collecting device 3, and purified air from which the odor is removed by the deodorizing device 4 is blown out. An outlet damper 11 is installed at the rear outlet 5b.

Next, the operation of the air treatment device will be described.
In the air treatment device, water vapor, oily smoke, and odor generated during cooking on the IH cooking heater 6 are sucked into the air treatment device from the opening of the suction portion 1 by the blower 2 and installed in the suction port 1. As a result, most of the water vapor and oily smoke are removed. This air passes through the electrostatic precipitator device 3. A high voltage is applied to the electrostatic precipitator 3, and electric charges are applied to the remaining water vapor and oil smoke in the airflow by corona discharge at the ionization unit, and the charged particles pass through the collector unit. The dust is collected and removed.
Thereafter, the air from which water vapor and oily smoke have been removed passes through the deodorizing device 4. By passing through the deodorizing device 4, the odor in the airflow is removed by the deodorizing catalyst, and the purified air is blown out from the outlet 5.

Here, the electrode structure of the electrostatic dust collection device 3 will be described.
The electrostatic dust collection device 3 is a two-stage system that is divided into an ionization section and a collector section on the downstream side thereof. FIG. 3 shows an exploded perspective view of the electrodes of the electrostatic dust collection device 3.
The ionization part is a conductive wire formed of metal or the like, a conductive electrode formed of metal, conductive resin, or the like, and a discharge electrode 12 (FIG. 3A) such as a needle-like electrode or a flat projection electrode. A plurality of ground electrodes 13 (FIG. 3B), which are flat counter electrodes, are arranged in parallel.
The discharge electrode 12 is electrically connected by a power supply member 15 formed of metal or the like, and is supported by the casing 16 of the ionization unit. The ground electrode 13 is often molded integrally with the support frame 14.

The collector section includes a long plate-shaped high voltage electrode 17 (FIG. 3 (c)) formed of a semiconductive resin obtained by kneading an antistatic agent or the like into a resin, and a conductive resin such as metal, or the resin surface. Is formed by laminating a plurality of dust collecting electrodes 18 (FIG. 3D) of a long plate-like body formed of a conductive resin in which carbon fiber or metal fine particles are kneaded. .
The high voltage electrode 17 is formed by integral molding to be a high voltage electrode block 20.
The dust collection electrode 18 is electrically connected and is often molded integrally with the support frame 19.
A constant voltage is applied to the electric dust collection device 3. The voltage applied at this time is DC positive or negative 3 to 7 kV.

Further, the detailed structure and operation of the collector part will be described.
FIG. 4 is a view of the collector portion of the electrostatic dust collection device as viewed from the leeward side, and FIG. 5 is a perspective view of the high-voltage electrode block.
The high voltage electrode 17 and the dust collecting electrode 18 are combined, and the long plate-like bodies are alternately stacked at a predetermined interval so that the plane of the plate-like body is parallel to the airflow direction of the air passage.
The high-voltage electrode 17 is supported and integrally formed by embedding and installing support bars 21, which are orthogonal long-shaped square-shaped support members, at both ends of a plurality of long plate-like bodies arranged in parallel from the leeward side. It has become. The support bar 21 is formed along the longitudinal direction and has a U-shaped opening that opens to the leeward side. A bar-shaped power supply member 22 made of metal that supplies a high voltage to the high-voltage electrode 17 is installed in the U-shaped opening.
The high-voltage electrode 17 and the support bar 21 are formed of the same semiconductive resin, and are fixed to each other as a single piece or separately, with the same conductivity. The semiconductive resin base material used for the high-voltage electrode 17 and the support bar 21 is less oil-resistant than polypropylene resin (PP resin) or PP resin, which has good oil resistance, but has improved moldability and chemical resistance. ABS resin is used.

A voltage is applied to the support bar 21 by contacting the power supply member 22. The support bar 21 is installed on the leeward side, and the power feeding member 22 is invisible from the leeward side. Direct current plus or minus 3 to 7 kV is applied to the power supply member 22, and a high voltage is applied to the high voltage electrode 17 via the support bar 21. At this time, since the high voltage electrode 17 and the support bar 21 are formed of a semiconductive resin having a surface resistivity of 1.0 × 10 ^{10 to} 1.0 × 10 ¹⁴ Ω / □, the high voltage electrode 17 has a surface potential of Although the potential is high, no current flows, so no discharge occurs. Therefore, in the collector part, the charged particles charged in the ionization part are collected by the Coulomb force generated by the surface potential.
When the inflowing foreign matter is oil smoke or the like, the oil smoke component gradually accumulates on the surface of the high voltage electrode 17 on the windward side of the air passage. The high-voltage electrode 17 is less oil-resistant than PP resin or PP resin with good oil resistance, but ABS resin with improved moldability and improved chemical resistance is used, but the surface resistivity increases with time. It is reduced by about 2 to 8 digits from the initial value. However, the place where the support bar 21 is in contact with the power supply member 22 is the leeward side in the air passage of the high-voltage electrode 17, and is a U-shaped opening, and does not face the airflow in the air passage, so that oil smoke does not adhere. Therefore, the support bar 21 in the vicinity of the power supply member 22 does not cause a decrease in surface resistance due to oily smoke, and even if the surface resistance of the high-voltage electrode 17 on the windward side of the wind path is reduced, the collector part is less likely to reduce the dust collection efficiency. In addition, abnormal discharge does not occur.

As described above, the semiconductive resin used for the high-voltage electrode 17 in the collector portion is a PP resin having a surface resistivity of 1.0 × 10 ^{10 to} 1.0 × 10 ¹⁴ Ω / □, or ABS with enhanced chemical resistance. A power supply member 22 that uses a resin and applies a high voltage is also made of this semiconductive resin, and is embedded (or partially embedded) in the U-shaped opening of the support bar 21 that supports the high-voltage electrode 17. Thus, it is possible to prevent oil smoke components and the like from accumulating at a location where the power supply member 22 and the support bar 21 are in contact with each other or in the vicinity thereof. Therefore, when a high voltage is applied to the power supply member 22, even if oil smoke components or the like accumulate on the windward side of the high-pressure electrode 17 and the surface resistance of the high-voltage electrode 17 on the windward side of the airway decreases, It can be prevented that the surface current easily flows from the member 22 through the support bar 21 to the high-voltage electrode 17, and the surface potential of the high-voltage electrode 17 becomes high, but no current flows. There is little decrease and abnormal discharge does not occur. That is, the power supply member 22 is installed on the leeward side of the air path of the high-voltage electrode 17 integrated by the support bar 21 or the power supply member 22 is embedded and the power supply member 22 does not face the air current in the air path. There is little decrease in the dust collection efficiency of the part, and abnormal discharge does not occur.
Further, if the leeward side (the paper surface side in FIG. 4) of the support bar 21 is covered with an insulator together with the power supply member 22, the dust collection efficiency is more reliably reduced and abnormal discharge does not occur. You can

In the electric dust collection device 3 of the present air treatment apparatus, a semiconductive resin is used for the high voltage electrode 17 of the collector portion, and the surface low efficiency as this semiconductive resin is 1.0 × 10 ^{10 to} 1.0 ×. Since 10 ¹⁴ Ω / □ polypropylene resin or chemical-resistant ABS resin is used, the collector part has high dust collection efficiency and can prevent the occurrence of abnormal discharge. Further, even if chemical substances such as oily smoke or water vapor are contained as foreign matter in the air, the high-voltage electrode 17 is less likely to be denatured over time, and the reduction in surface efficiency is reduced by that amount. Reduction in efficiency and occurrence of abnormal discharge can be reduced.

Embodiment 2. FIG.
In the air treatment apparatus of the second embodiment, the electrode configuration of the high-voltage electrode 17 of the electric dust collection device 3 of the first embodiment is modified, that is, the mounting configuration of the support bar 21 and the power supply member 22 to the high-voltage electrode 17. The other configurations are the same as those of the first embodiment. Therefore, only the differences will be mainly described below.
FIG. 6 is a view of the collector portion of the electrostatic dust collection device in the air treatment apparatus according to the second embodiment as viewed from the leeward side, and FIG. 7 is a perspective view of the high-voltage electrode block of the electrostatic dust collection device.
As in the case of the first embodiment, the high voltage electrodes 17 and the dust collecting electrodes 18 are alternately stacked, and the high voltage electrodes 17 are supported by the support bars 21.
In the high-voltage electrode 17, support bars 21, which are orthogonal long rectangular material support members, are embedded from both ends of the longitudinal direction of a plurality of long plate-like bodies arranged in parallel from the air path end side. Therefore, it is supported and integrated.

The support bar 21 is formed along the longitudinal direction and has a U-shaped opening that opens to the air path end side. A bar-shaped power supply member 22 made of a metal that supplies a high voltage to the high-voltage electrode 17 is embedded and installed in the U-shaped opening.
The high-voltage electrode 17 and the support bar 21 are formed of the same semiconductive resin, and are fixed to each other as a single piece or separately, with the same conductivity. The semiconductive resin base material used for the high-voltage electrode 17 and the support bar 21 is less oil-resistant than polypropylene resin (PP resin) or PP resin, which has good oil resistance, but has improved moldability and chemical resistance. ABS resin is used.

Even in the configuration of the high-voltage electrode 17, the semiconductive resin used for the high-voltage electrode 17 in the collector portion is a PP resin having a surface resistivity of 1.0 × 10 ^{10 to} 1.0 × 10 ¹⁴ Ω / □ or chemical resistance. The power supply member 22 for applying a high voltage is made of this semiconductive resin and is U-shaped and opened to the end of the air path of the support bar 21 that supports the high voltage electrode 17. By being embedded in the opening of the shape, it is possible to prevent oil smoke components and the like from accumulating at a location where the power supply member 22 and the support bar 21 are in contact with each other or in the vicinity thereof.
Therefore, even when a high voltage is applied to the power supply member 22, even if oil smoke components or the like accumulate on the windward side of the high-pressure electrode 17 and the surface resistance of the high-voltage electrode 17 on the windward side of the airway decreases, It can be prevented that the surface current easily flows from the member 22 through the support bar 21 to the high-voltage electrode 17, and the surface potential of the high-voltage electrode 17 becomes high, but no current flows. There is little decrease and abnormal discharge does not occur. That is, at the end of the high voltage electrode 17 integrated by the support bar 21 in the longitudinal direction, the power supply member 22 is installed on the air path end side of the air path, or the power supply member 22 is embedded and installed. Since it does not face the airflow in the air passage, the dust collection efficiency of the collector portion is hardly lowered and abnormal discharge does not occur.
Further, if the air path end side (left side in FIG. 7) of the support bar 21 is covered with an insulator together with the power supply member 22, the dust collection efficiency is more reliably reduced and abnormal discharge occurs. There can be no.

  The electrostatic precipitator 3 of the present air treatment apparatus is charged by an ionization unit that generates a corona discharge between a discharge electrode 12 and a ground electrode 13 that is a counter electrode to charge foreign matter in an air current, and the ionization unit. A collector part that collects dust on the dust collecting electrode 18 by applying a voltage between the high voltage electrode 17 and the dust collecting electrode 18 is disposed in the air path, and the collector high voltage electrode 17 is formed of a semiconductive resin. The power supply member 22 for applying a voltage to the high-voltage electrode 17 is installed from the end of the longitudinal direction of the high-voltage electrode 17 from the air path end side in the air path so that the power supply member 22 does not face the air flow in the air path. Therefore, by forming the high-voltage electrode 17 of the collector portion with a semiconductive resin, the dust collection efficiency is high and no abnormal discharge occurs. In particular, the power supply member for applying a voltage to the high-voltage electrode 17 22 is the longitudinal end of the high-voltage electrode 17 Since the power supply member 22 is installed from the air path end side in the air path so that it does not face the air flow in the air path, even if air containing chemical substances such as oil smoke and water vapor flows in, the high pressure The installation portion of the power supply member 22 of the electrode 17 has no accumulation of oily smoke, etc., the surface potential of the high-voltage electrode 17 is high, and the characteristic that current does not flow can be maintained. It is possible to prevent the dust collection efficiency from being lowered and the occurrence of abnormal discharge.

  As described above, the air processing apparatuses according to the first and second embodiments use semiconductive resin for the suction portion 1 having the suction port and the high-voltage electrode 17 of the collector portion, and the power supply member 22 is connected to the high-pressure electrode 17. The electrostatic dust collecting device 3 installed on the leeward side in the air passage or at the end in the longitudinal direction of the high voltage electrode 17 from the air passage end side in the air passage, the deodorizing device 4 having a deodorizing catalyst, the blower 2, The air outlet is formed by arranging the air outlets 5 having the air outlets in this order, and foreign substances in the air sucked from the air inlets by the blower 2 are collected and removed by the electric dust collecting device 3, and odors in the air Is removed by the deodorizing device 4. This electric dust collection device can prevent a decrease in dust collection efficiency and abnormal discharge due to changes over time even when air containing chemical substances such as oil smoke and water vapor flows. Therefore, the present air treatment apparatus exhibits an air cleaning function that is stable over time when used in such an atmosphere.

It is the figure which looked at the air treatment apparatus of Embodiment 1 of this invention from the side surface side. It is the figure which looked at the air treatment apparatus of Embodiment 1 of this invention from the upper surface side. It is a disassembled perspective view of the electrode of the electrostatic dust collection device of the air treatment apparatus of Embodiment 1 of this invention. It is the figure which looked at the collector part of the electric dust collection device of the air treatment apparatus of Embodiment 1 of this invention from the leeward side. It is a perspective view of the high voltage | pressure electrode block of the electrostatic dust collection device of the air treatment apparatus of Embodiment 1 of this invention. It is the figure which looked at the collector part of the electric dust collection device of the air treatment apparatus of Embodiment 2 of this invention from the leeward side. It is a perspective view of the high voltage | pressure electrode block of the electrostatic dust collection device of the air treatment apparatus of Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction part, 2 Blower, 3 Electric dust collection device, 4 Deodorization device, 5 Blowing part, 5a, 5b Outlet, 12 Discharge electrode, 13 Ground electrode, 17 High voltage electrode, 18 Dust collection electrode, 21 Support bar, 22 Power supply Element.

Claims (4)

An ionization part that generates corona discharge between the discharge electrode and the counter electrode to charge oil smoke or water vapor generated in the kitchen in the air stream, and oil smoke or water vapor generated in the kitchen charged in the ionization part to the high-pressure electrode In the electric dust collection device in which a voltage is applied between the dust collection electrodes and the collector part that collects dust on the dust collection electrode is arranged in the air path,
A high-voltage electrode of the collector part and a support bar having a U-shaped opening for supporting the high-voltage electrode are formed of the same semiconductive resin, and the support bar is formed at both ends of the leeward side in the air passage of the high-voltage electrode. A power supply member that is embedded in a section and applies a voltage to the high-voltage electrode is disposed in contact with the inside of the support bar that opens to the leeward side so as not to face the airflow in the wind path. Dust collection device. An ionization part that generates corona discharge between the discharge electrode and the counter electrode to charge oil smoke or water vapor generated in the kitchen in the air stream, and oil smoke or water vapor generated in the kitchen charged in the ionization part to the high-pressure electrode In the electric dust collection device in which a voltage is applied between the dust collection electrodes and the collector part that collects dust on the dust collection electrode is arranged in the air path,
A high voltage electrode of the collector part and a support bar having a U-shaped opening for supporting the high voltage electrode are formed of the same semiconductive resin, and the support bar is formed at both ends in the longitudinal direction of the high voltage electrode. An inside of the support bar that is embedded on the air passage end side in the air passage and opens a power supply member that applies a voltage to the high-voltage electrode on the air passage end side so as not to face the air flow in the air passage An electrostatic dust collection device, which is installed in contact with 2. The polypropylene resin or chemical-resistant ABS resin having a surface resistivity of 1.0 × 10 ^{10 to} 1.0 × 10 ¹⁴ Ω / □ is used as the semiconductive resin. The electric dust collection device according to claim 2.   The suction part which has a suction inlet, the electric dust collection device in any one of the said Claims 1-3, the deodorizing device which has a deodorizing catalyst, an air blower, and the blowing part which has a blower outlet are arrange | positioned in this order Forming a wind path, collecting foreign matter in the air sucked from the suction port by the blower with the electric dust collecting device, and removing odors in the air with the deodorizing device. Air treatment equipment equipped with an electrostatic dust collection device.

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