JP4451740B2 - Air purifier and air conditioner - Google Patents

Description

  The present invention relates to an air purifier, an air purifier using the air purifier, and an air conditioner including the air purifier.

  In recent years, air purifiers 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 cleaning devices ranging from large industrial devices to small home devices, and they are used alone or mounted inside an air conditioner.

  In recent years, air purifiers that have become widespread are those that apply electric charges to fine particles in an air stream by corona discharge or the like, and collect and remove charged particles by electrostatic force while the charged particles pass through an electric field. It can be said as an electrostatic precipitator.

A conventional air purifier has a ground plate parallel to the discharge electrode or wire discharge electrode with a sharp tip, and a high voltage is applied to the discharge electrode with a sharp tip to generate a discharge between the electrodes. A charging unit for charging the dust is provided, and a dust collecting unit for collecting the dust charged by the charging unit is provided downstream of the charging unit to remove the dust in the space (see, for example, Patent Document 1).
JP 2001-276649 A

  In general, an air purifier is composed of a charging unit that charges airborne dust in the air and a dust collection unit that collects the charged airborne dust. In order to improve dust collection efficiency, It is important to charge the floating dust in the charging part or to collect the floating dust charged in the dust collecting part firmly.

  In the conventional air cleaning device, since the flat ground electrode is arranged on the discharge electrode having a sharp tip, the discharge is performed almost straight from the front end of the discharge electrode to the ground electrode between the flat ground electrodes. As a result, there is a problem that the charged area of the floating dust is narrowed and the dust collection efficiency is lowered.

  In order to solve this problem, there is a method in which the charging part is composed of a wire discharge electrode and a ground plate, but this method secures a charged area, but the aging and the user accidentally touch the wire and wire The wire discharge electrode is in contact with the ground electrode, and there is a risk of fire.

  The present invention has been made to solve the above-described problems, and generates a discharge that spreads from the tip of the discharge electrode to the ground electrode surface, thereby obtaining a wide charged area of floating dust, and collecting the dust. It is an object of the present invention to provide an air purifier capable of improving efficiency, an air purifying apparatus using the air purifier, and an air conditioner incorporating the air purifier.

  The air cleaner according to the present invention generates an air discharge by applying a high voltage between a discharge electrode having a sharp tip and a ground electrode of a charging unit provided so as to surround the discharge electrode. Charging units that charge floating dust in the air, dust collector high-voltage electrodes to which a high voltage is applied, and ground electrodes of the dust collector are arranged alternately to collect the floating dust charged by the charging unit. A dust part is provided.

  With the above configuration, the air purifier according to the present invention generates a discharge that spreads from the tip of the discharge electrode to the ground electrode surface, and can obtain a wide charged area of floating dust, thereby improving the dust collection efficiency. It is done.

Embodiment 1 FIG.
1 to 14 are diagrams showing Embodiment 1, FIG. 1 is a perspective view of an air cleaner with the prefilter closed, FIG. 2 is a perspective view of the air cleaner with the prefilter open, and FIG. Is an exploded perspective view of the air cleaner, FIG. 4 is a front view of the discharge electrode, FIG. 5 is a rear perspective view of the discharge electrode attached to the frame, FIG. 6 is a front view of the ground electrode, and FIG. FIGS. 8 to 12 are sectional views showing the charging unit of the air cleaner, FIG. 13 is a sectional view showing the charging unit of the conventional air cleaner, and FIG. 14 is the principle of the air cleaner. FIG.

  As shown in the perspective views of the air purifier of FIGS. 1 and 2, the air purifier 1 has a pre-filter 2 on the upstream side (outside) of a frame 3 having a grid-like air intake, and a discharge electrode 4. The charging unit and the dust collecting unit having the above are housed inside the frame 3. In order to make the figure easy to see, the ground electrode and the semi-insulating resin are omitted. The prefilter 2 is attached to the frame 3 so as to be freely opened and closed. This is because when the dust collecting part is washed with water, it is easier to wash without the pre-filter 2.

  As shown in the exploded perspective view of the air cleaner of FIG. 3, the air cleaner 1 has a pre-filter 2 on the upstream side (outside) of the frame 3 having a lattice-like air intake, and the frame 3 has an inside. Consists of a charging portion 10 composed of a discharge electrode 4 and a ground electrode 5, a semi-insulating resin 6 (dust collecting portion high voltage electrode), and a ground electrode 5. The semi-insulating resin 6 and the ground electrode 5 are alternately arranged. The dust collection part 11 arrange | positioned in is stored. The ground electrode 5 is provided with a terminal 7 that comes into contact with a terminal component of a high-voltage power supply unit (not shown).

  FIG. 4 is a front view of the discharge electrode. As shown in the figure, the discharge electrode 4 has a horizontally long rectangular shape, has a long side extending in the longitudinal direction at the center, and has three long sides in total. . From each long side, an electrode having a sharp tip is formed in a direction perpendicular to the ventilation path. The long side of both ends is formed on one inner side, and the central long side is formed with an electrode having a sharp tip on both sides. The material of the discharge electrode 4 is a sheet metal, and specifically, for example, stainless steel (SUS304) is used.

  As shown in FIG. 5, the discharge electrode 4 has three long sides of the horizontally long rectangle positioned in the recesses of the frame 3. And it has a bending part which engages with the partition part which partitions the inner side and the outer side of the frame 3 in the vicinity of the two long sides outside the horizontally long rectangle, and this bent part is semi-insulated from the partition part of the frame 3. The discharge electrode 4 is fixed by being sandwiched between the resin 6.

As shown in FIGS. 6 and 7, the ground electrode 5 includes a ground electrode 51 of a charging portion and a ground electrode 52 of a dust collection portion provided so as to surround the discharge electrode 4 having a sharp tip. Then, the grounding electrode 51 of the charging unit and the grounding electrode 52 of the dust collecting unit are integrated. As the material of the ground electrode 5, for example, a conductive resin obtained by adding carbon fiber or carbon black to ABS resin is used. This conductive resin has a surface resistance value of 10 ⁴ Ω or less.
In the above example, the ground electrode 51 of the charging unit and the ground electrode 52 of the dust collecting unit are integrated, but they may not be integrated. Further, for example, the ground electrode 51 of the charging unit may be configured separately from a sheet metal, and the ground electrode 52 of the dust collecting unit may be configured separately from the above conductive resin.

  In the charging unit shown in FIG. 8, the ground electrode 51 of the charging unit is composed of a ground electrode 51a of a wavy charging unit. Then, the ground electrode 51a of the wavy charging portion is arranged so as to surround the discharge electrode 4 having a sharp tip, thereby forming the charging region 8. The inflow direction of the dust is a direction orthogonal to the discharge electrode 4 as shown in the figure.

  In the charging unit shown in FIG. 9, the ground electrode 51 of the charging unit is composed of a ground electrode 51b of a trapezoidal charging unit. Then, the ground electrode 51b of the trapezoidal charging portion is disposed so as to surround the discharge electrode 4 having a sharp tip, thereby forming the charging region 8.

  In the charging unit shown in FIG. 10, the grounding electrode 51 of the charging unit is composed of a grounding electrode 51c of a triangular charging unit. Then, the ground electrode 51c of the triangular charging portion is disposed so as to surround the discharge electrode 4 having a sharp tip, thereby forming the charging region 8.

  In the charging unit shown in FIG. 11, the ground electrode 51 of the charging unit is configured by a ground electrode 51 d of the rectangular charging unit. Then, the ground electrode 51d of the rectangular charging portion is arranged so as to surround the discharge electrode 4 having a sharp tip, thereby forming the charging region 8.

  In the charging unit shown in FIG. 12, the grounding electrode 51 of the charging unit is constituted by a grounding electrode 51e of a charging unit having a trapezoidal shape with a rounded tip. Then, the ground electrode 51e of the charging portion having a trapezoidal shape with a round tip is arranged so as to surround the discharge electrode 4 with a sharp tip, thereby forming the charging region 8.

  In the charging part of the conventional air cleaner shown in FIG. 13, a flat electrode-shaped grounding electrode 51f is arranged on the discharge electrode 4 having a sharp tip 4a.

Next, the operation will be described.
As shown in the principle diagram of the air purifier in FIG. 14, first, in the charging unit 10, the discharge electrode 4 having a sharp tip 4 a and the ground electrode 5 provided so as to surround the discharge electrode 4 (the ground electrode 51 of the charging unit). ), For example, a high voltage of 6 kv is applied to generate a corona discharge toward the ground electrode 5, so that a wide charging region 8 for charging the inflowing floating dust can be secured. Particles charged by the electrostatic field generated in the ground electrode 52 and the semi-insulating resin 6 repel on the side of the semi-insulating resin 6 to which a high voltage is applied, and are attracted and collected by the ground electrode 5 formed of a conductive resin. Can do.

  The charging part of the conventional air purifier shown in FIG. 13 has a flat plate-like charging from the tip 4a of the discharge electrode 4 because the ground electrode 51f of the flat plate-like charging part is arranged on the discharge electrode 4 having a sharp tip. Discharge between the ground electrodes 51f of the flat portion toward the ground electrode 51f of the flat charging portion, and as a result, the charged region 8 of the floating dust is narrowed and the dust collection efficiency is lowered. It was.

  On the other hand, the charging unit of the present embodiment generates a corona discharge toward the ground electrode 5 by applying a high voltage to the ground electrode 51 of the charging unit provided so as to surround the discharge electrode 4. Thus, it is possible to secure a wide charging region 8 for charging the inflowing floating dust.

  The shape of the ground electrode 51 of the charging portion provided so as to surround the discharge electrode 4 is changed to the ground electrode 51a of the wavy charging portion (FIG. 8), the ground electrode 51b of the trapezoidal charging portion (FIG. 9), and the triangular shape. Floating inflow by forming a grounding electrode 51c (FIG. 10) of the charging unit, a grounding electrode 51d (FIG. 11) of the quadrangular charging unit, and a grounding electrode 51e (FIG. 12) of the charging unit having a rounded tip. The charging region 8 for charging the dust can be secured widely, and the particles charged by the electrostatic field generated between the ground electrode 52 and the semi-insulating resin 6 in the dust collecting portion are, for example, a half to which a high voltage of 6 kv is applied. It is repelled on the insulating resin 6 side, and can be sucked and collected by the ground electrode 52 of the dust collecting portion molded with the conductive resin.

  By providing the ground electrode 51 of the charging unit so as to surround the discharge electrode 4, it is possible to secure a wide charging area 8 for charging the inflowing floating dust, and the ground electrode 52 of the dust collection unit and the semi-insulating resin 6 Particles charged by the electrostatic field generated therebetween repel, for example, on the side of the semi-insulating resin 6 to which a high voltage of 6 kv is applied, and are attracted to the ground electrode 52 of the dust collecting part formed of conductive resin and collected. The ground electrode 51 of the charging unit and the ground electrode 52 of the dust collecting unit are integrally molded, so that the number of parts can be reduced, and an air cleaner excellent in assemblability and recyclability can be obtained.

  The relationship between the distance between the discharge electrode 4 and the ground electrode 51 of the charging unit provided so that the tip 4a surrounds the acute discharge electrode 4 is the shortest distance A between the discharge electrode 4 and the ground electrode 51 of the charging unit, and the discharge electrode. 4 so that the vertical distance B between the charging electrode and the ground electrode 51 of the charging portion satisfies A ≦ B, and the discharge electrode 4 is charged from the portion having a high electric field strength at the tip 4a of the discharging electrode to the grounding electrode 51 of the charging portion. The phenomenon of discharging perpendicularly to the part is carried out by making the discharge around the periphery of the tip 4a of the discharge electrode closer to the distance B in the vertical direction, not only in the vertical direction but also in the surroundings, resulting in floating dust Therefore, it is possible to obtain an air cleaner that can secure a wide charging region 8 for charging and has good dust collection efficiency.

  In the air cleaner 1 of the above-described embodiment, in the conventional flat electrode grounding electrode (FIG. 13), the discharge electrode tip 4a is narrower from the tip 4a of the flat charging unit to the ground electrode 51f of the flat charging unit. The discharge in the region occurs and the charged region 8 of the floating dust is narrow, whereas the ground electrode (FIG. 8) of the wave-shaped charging unit provided so that the tip 4a surrounds the discharge electrode 4 with a sharp angle, The grounding electrode of the charging unit (FIG. 9), the grounding electrode of the triangular charging unit (FIG. 10), the grounding electrode of the rectangular charging unit (FIG. 11), and the grounding electrode of the charging unit with a rounded tip (FIG. 12). ) And the like, it is possible to generate a discharge that spreads from the tip 4a of the discharge electrode 4 to the ground electrode surface, and to obtain a wide charged area 8 of floating dust, resulting in an effect of improving dust collection efficiency. .

Embodiment 2. FIG.
In the first embodiment, the air cleaner has been described. Next, an air cleaner in which the air cleaner is incorporated in the box 30 having the suction port 31 and the air outlet 32 will be described.

  FIG. 15 shows the second embodiment and is a cross-sectional view of the air cleaning device. In the figure, the air purifier 50 has the air purifier 1 disposed inside an air passage 33 composed of a suction port 31 and a blowout port 32 of a box 30. The blower that blows air to the ventilation path 33 may be disposed inside the air cleaning device 50 or may be disposed outside.

Next, the operation will be described.
Since the air purifier 1 according to the first embodiment is arranged in the box 30, the air flowing in from the suction port 31 passes through the air purifier 1 from the ventilation path 33 and the amount of floating dust from the air outlet 32. Thus, the air cleaning device 50 that sends out less air can be obtained.

Embodiment 3 FIG.
An embodiment in which the air purifier 1 according to Embodiment 1 is incorporated into a wall-mounted air conditioner will be described.
FIGS. 16 to 18 are diagrams showing Embodiment 3, FIG. 16 is a cross-sectional view of an indoor unit of a wall-mounted air conditioner, FIG. 17 is a front view of the indoor unit of the wall-mounted air conditioner, and FIG. It is a front view of the modification of the indoor unit of a harmony machine.

  The wall-mounted air conditioner indoor unit 40 has an air purifier somewhere in an air ventilation path including a heat exchanger 42, a blower 43 that generates an air flow, and a blower outlet 44 downstream of the suction port 41. Although the apparatus 1 should just be arrange | positioned, in FIG. 16, the example arrange | positioned in the front upper part of the upstream of the heat exchanger 42 is shown. In this case, since air with a small amount of floating dust is sent to the components after the heat exchanger 42, it is possible to suppress the floating dust from adhering to those components. In addition, the air cleaner 1 can achieve the same effect even if it is disposed on the lower portion of the front surface or the rear surface on the upstream side of the heat exchanger 42.

  In FIG. 17, the high voltage power supply unit 45 is shown, but the terminal 7 attached to the ground electrode 5 contacts the terminal component of the high voltage power supply unit 45.

Next, the operation will be described.
As described above, since the air cleaner 1 according to the first embodiment is arranged in the wall-mounted air conditioner indoor unit 40, the room air flowing in from the suction port 41 passes through the air cleaner 1. In addition to the basic function of the wall-mounted air conditioner that adjusts the indoor temperature and humidity, the indoor air is heated or cooled by the heat exchanger 42 and blown into the room to adjust the temperature and humidity. A wall-mounted air conditioner that removes indoor dust can be obtained.

  As shown in FIG. 18, a catalytic filter formed of an oxide and a discharge electrode that removes and decomposes indoor malodors, volatile organic compounds (VOC), formaldehyde, and the like provided in the ventilation path of the air conditioner indoor unit 40. Further, a comfortable indoor space can be obtained by combining with the deodorizing device 60 configured by the above.

Embodiment 4 FIG.
An embodiment in which the air cleaner 1 of the first embodiment is incorporated in a ceiling cassette type air conditioner will be described.
FIG. 19 shows the fourth embodiment and is a cross-sectional view of an indoor unit of a ceiling cassette type air conditioner.
As shown in the figure, the air purifier 1 according to Embodiment 1 is arranged on the upstream side of the heat exchanger 42. However, as in the third embodiment, the air purifier 1 is located somewhere in the air ventilation path composed of the heat exchanger 42, the blower 43 that generates the air flow, and the air outlet 44 downstream of the suction port 41. May be arranged.

  As described above, since the air purifier 1 according to Embodiment 1 is arranged in the ceiling cassette type air conditioner indoor unit 40, the indoor air flowing in from the suction port 41 passes through the air purifier 1. This makes it possible to remove the airborne dust in the room, so that the basic function of the ceiling cassette type air conditioner that adjusts the temperature and humidity in the room by heating or cooling the room air by the heat exchanger 42 and blowing it out to the room. In addition, a ceiling cassette type air conditioner that removes indoor dust can be obtained.

Embodiment 5 FIG.
An embodiment in which the air purifier 1 according to the first embodiment is incorporated in a floor-mounted air conditioner will be described.
FIG. 20 shows the fifth embodiment and is a cross-sectional view of an indoor unit of a floor-mounted air conditioner.
As shown in the figure, the air purifier 1 of the first embodiment is arranged on the upstream side of the blower 43. However, as in the third embodiment, the air purifier 1 is located somewhere in the air ventilation path composed of the heat exchanger 42, the blower 43 that generates the air flow, and the air outlet 44 downstream of the suction port 41. May be arranged.

  As described above, since the air purifier 1 according to Embodiment 1 is arranged in the floor-mounted air conditioner indoor unit 40, the indoor air flowing in from the suction port 41 passes through the air purifier 1. In addition to the basic function of the floor-mounted air conditioner that adjusts the indoor temperature and humidity, the indoor air is heated or cooled by the heat exchanger 42 and blown into the room, and the room air can be removed. A floor-mounted air conditioner that removes indoor dust can be obtained.

  Further, by incorporating the air purifier 1 of the first embodiment into an air conditioner that adjusts the temperature and humidity of a space such as an air conditioner for trains, an air conditioner for vehicles, an air conditioner for elevators, etc., the indoor temperature and humidity In addition to the basic function of each air conditioner that adjusts the function, it is possible to add a function to remove dust in the room.

It is a figure which shows Embodiment 1, and is a perspective view of the air cleaner of the state which closed the pre filter. It is a figure which shows Embodiment 1, and is a perspective view of the air cleaner of the state which opened the pre filter. It is a figure which shows Embodiment 1, and is an exploded perspective view of an air cleaner. It is a figure which shows Embodiment 1 and is a front view of a discharge electrode. It is a figure which shows Embodiment 1, and is a back perspective view of the state which attached the discharge electrode to the frame. FIG. 5 shows the first embodiment and is a front view of a ground electrode. It is a figure which shows Embodiment 1, and is a perspective view of the charging part and dust collection part of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charge part (case of a corrugated ground electrode) of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charging part (case of a trapezoid-shaped ground electrode) of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charging part (case of a triangular-shaped ground electrode) of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charging part (case of a square-shaped ground electrode) of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charging part (case of a trapezoid earth electrode with a round tip) of an air cleaner. It is a figure which shows Embodiment 1, and is sectional drawing which shows the charging part of the conventional air cleaner shown for a comparison. It is a figure which shows Embodiment 1 and is a principle figure of an air cleaner. It is a figure which shows Embodiment 2, and is sectional drawing of an air purifying apparatus. It is a figure which shows Embodiment 3, and is sectional drawing of the indoor unit of a wall-hanging type air conditioner. It is a figure which shows Embodiment 3, and is a front view of the indoor unit of a wall-hanging type air conditioner. It is a figure which shows Embodiment 3, and is a front view of the modification of the indoor unit of a wall-hanging type air conditioner. It is a figure which shows Embodiment 4, and is sectional drawing of the indoor unit of a ceiling cassette type air conditioner. It is a figure which shows Embodiment 5, and is sectional drawing of the indoor unit of a floor-standing type air conditioner.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Air cleaner, 2 Pre filter, 3 Frame, 4 Discharge electrode, 5 Ground electrode, 6 Semi-insulating resin, 7 Terminal, 8 Charging area, 10 Charging part, 11 Dust collection part, 30 Box, 31 Suction port, 32 Air outlet, 33 Ventilation path, 40 Air conditioner indoor unit, 41 Air inlet, 42 Heat exchanger, 43 Air blower, 44 Air outlet, 45 High voltage power supply unit, 51 Charging unit ground electrode, 51a Wave-shaped charging unit grounding Electrode, 51b Ground electrode of trapezoidal charging unit, 51c Grounding electrode of charging unit of triangle shape, 51d Grounding electrode of charging unit of square shape, 51e Grounding electrode of charging unit with rounded tip, 51f Flat plate charging Ground electrode, 52 dust collector ground electrode, 60 deodorizing device.

Claims (3)

A discharge electrode with a sharp tip;
A charging unit that charges floating dust in the air by applying a high voltage to the ground electrode of the charging unit provided so as to surround the discharge electrode to generate an air discharge; and
A dust collector to which high voltage is applied and a ground electrode of the dust collector are alternately arranged, and a dust collector to collect floating dust charged by the charging unit, and
With the ground electrode of the charging portion is formed wave-shaped,
The shortest distance A and the ground electrode of the discharge electrode and the charging unit, and shorter than the electrode direction distance B between the ground electrode of the discharge electrode and the charging unit,
The grounding electrode of the charging unit and the grounding electrode of the dust collecting unit are made of a conductive resin having a surface resistance value of 10 ⁴ Ω or less, and the grounding electrode of the charging unit and the grounding electrode of the dust collecting unit are An air cleaner characterized by being integrally molded. An air conditioner having a suction port, a heat exchanger downstream of the suction port, a blower for generating an air flow, and an air outlet, and a ventilation path between the air inlet and the air outlet An air conditioner comprising the air purifier according to claim 1 in the ventilation path. The air conditioner according to claim 2 , further comprising a deodorizing device having a discharge electrode and a catalyst filter formed of an oxide in the ventilation path.

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