WO2021090443A1

WO2021090443A1 - Dust collection device and air conditioning device provided with dust collection device

Info

Publication number: WO2021090443A1
Application number: PCT/JP2019/043688
Authority: WO
Inventors: 政郎弓削; 彰則清水; 保博中村; 太田　幸治
Original assignee: 三菱電機株式会社
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2021-05-14
Also published as: JP6698973B1; JPWO2021090443A1; CN114599451A

Abstract

This dust collection device is configured so that dust contained in air that flows through a flowpath is collected by a collection plate that has been electrified by friction. The dust collection device comprises a dust electrification unit that: is disposed, in the direction in which the air passes, on the upstream side of the dust collection plate; and generates ions and electrifies the dust so that the dust is caused to collect on the collection plate as a result of receiving a static electric force for adsorption.

Description

Dust collector and air conditioner equipped with dust collector

The present invention relates to a dust collecting device that generates static electricity by friction and collects dust in the air, and an air conditioner equipped with the dust collecting device.

Conventionally, as a dust collecting device that collects dust in the air, there is a device that collects dust by static electricity generated by friction (see, for example, Patent Document 1). Patent Document 1 is arranged so as to be inserted into a gap between a plurality of collection plates arranged so as to be spaced apart from each other in a direction intersecting with an air passing direction and to be in contact with the surface of the collection plate. It has a configuration in which the brush is provided in the air passage in the housing. Then, the collection plate is rotated to electrostatically collect dust contained in the air passing between the collection plates.

Japanese Unexamined Patent Publication No. 61-227860

In Patent Document 1, when the surface of the collection plate is rubbed by a brush, an electric charge is induced on the surface of the collection plate and becomes charged. The dust contained in the air flowing into the air passage is not subject to electrostatic force, dust that is collected by the collection plate due to the electrostatic force that is adsorbed, dust that is not collected due to the electrostatic force that repels, and dust that is not collected due to the electrostatic force that repels. It can be classified as dust. Therefore, there is a problem that the collection performance is liable to fluctuate according to the charged state of dust when flowing into the air passage, and is not stable.

The present invention has been made to solve the above-mentioned problems, and is a dust collecting device capable of stably obtaining high collecting performance regardless of the charged state of dust when flowing into the air passage. An object of the present invention is to provide an air conditioner equipped with a dust collector.

The dust collecting device according to the present invention is a dust collecting device that collects dust contained in the air passing through the air passage with a collecting plate charged by friction, and is on the upstream side of the collecting plate in the air passing direction. It is provided with a dust charging part that charges the dust by generating ions so that the dust is collected by the collecting plate by receiving the electrostatic force that the dust is attracted to.

According to the present invention, the dust is charged so that the dust is collected on the collection plate by receiving the electrostatic force to be adsorbed. Therefore, the amount of dust not adsorbed on the collection plate is reduced, and high collection performance is achieved. It can be obtained stably.

It is a figure which shows the outline of the air conditioner equipped with the dust collecting device which concerns on Embodiment 1. FIG. It is a perspective view of the dust collecting device which concerns on Embodiment 1. FIG. It is a perspective view of the brush which the dust collecting device which concerns on Embodiment 1 has. It is a vertical sectional view schematically showing the dust collecting device which concerns on Embodiment 1. FIG. It is a vertical cross-sectional view which shows typically the 1st modification of the dust collecting device which concerns on Embodiment 1. FIG. It is a vertical cross-sectional view which shows typically the 2nd modification of the dust collecting device which concerns on Embodiment 1. FIG. It is a perspective view of the dust collecting device which concerns on Embodiment 2. FIG. It is a vertical sectional view schematically showing the dust collecting device which concerns on Embodiment 2. FIG. FIG. 5 is a schematic cross-sectional view of a configuration in which the ion removal electrodes of the dust collecting device according to the second embodiment are directly connected to the ground. FIG. 5 is a schematic cross-sectional view of a configuration in which an ion removing electrode included in the dust collecting device according to the second embodiment is connected to the ground via a DC power supply. It is a vertical sectional view schematically showing the dust collecting device which concerns on Embodiment 3. FIG. It is a figure which shows the state at the time of the dust collecting operation in the dust collecting device which concerns on Embodiment 3. FIG. It is a figure which shows the state at the time of the triboelectric operation in the dust collecting device which concerns on Embodiment 3. FIG.

Hereinafter, the dust collector and the air conditioner according to the embodiment will be described with reference to the attached drawings and the like. In the following drawings, those having the same reference numerals are the same or equivalent thereto, and are common to the whole texts of the embodiments described below. The form of the component represented in the entire specification is merely an example, and is not limited to the form described in the specification. In particular, the combination of components is not limited to the combination in each embodiment, and the components described in other embodiments can be applied to another embodiment. Further, in the following description, the upper side in the figure will be referred to as "upper side" and the lower side will be referred to as "lower side". Further, for ease of understanding, directional terms such as "right", "left", "front", "rear" are used as appropriate, but are for illustration purposes only. It is not limited. Then, in the drawings, the relationship between the sizes of the constituent members may differ from the actual one.

Embodiment 1.
Here, the dust collecting device according to the first embodiment and the air conditioner equipped with the dust collecting device will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram showing an outline of an air conditioner equipped with a dust collector according to the first embodiment. Here, the white arrows shown in FIG. 1 and each figure described later indicate the flow of air.

In FIG. 1, an outdoor air supply port 21 and an outdoor exhaust port 22 are provided on the outdoor wall surface. Further, on the indoor side of the falling ceiling 20, an indoor air supply port 23 and an indoor exhaust port 24 are provided. An air supply air passage 30 and an exhaust air passage 40 are formed in the descending ceiling 20. The air supply air passage 30 is an air passage that lowers the outdoor air from the outdoor air supply port 21, takes it into the ceiling 20, and blows it into the room from the indoor air supply port 23. The exhaust air passage 40 is an air passage that lowers indoor air from the indoor exhaust port 24, takes it into the ceiling 20, and exhausts it to the outside from the outdoor exhaust port 22.

Then, the dust collecting device 1 and the heat exchange ventilation device 10 are arranged in order from the upstream side in the air supply air passage 30. Further, a heat exchange ventilation device 10 is arranged in the exhaust air passage 40. In the air supply air passage 30, the outdoor air supply port 21 and the indoor air supply port 23 are connected by a duct 31 via a dust collecting device 1 and a heat exchange ventilation device 10. Further, in the exhaust air passage 40, the indoor exhaust port 24 and the outdoor exhaust port 22 are connected by a duct 41 via a heat exchange ventilation device 10.

The heat exchange ventilation device 10 is a ventilation device having a ventilation function and an air conditioning auxiliary function. The ventilation function is a function of supplying outdoor air to the room and exhausting the indoor air to the outside. As a configuration for realizing this ventilation function, the heat exchange ventilation device 10 includes a fan (not shown) that blows air from the outside to the inside of the air supply air passage 30 and an exhaust air passage 40 from the inside to the outside. It has a fan (not shown) that blows air.

The air-conditioning assist function is a function that assists the air-conditioning operation of equipment that adjusts the room temperature, such as an air conditioner, by recovering heat from the exhausted indoor air and giving the recovered heat to the air to be supplied. .. The air conditioning auxiliary function can be said to be an energy saving function because it is a function that reduces the energy burden on the equipment. As a configuration for realizing this air conditioning assist function, the heat exchange ventilation device 10 includes a heat exchanger (not shown) that exchanges heat between the air passing through the exhaust air passage 40 and the air passing through the air supply air passage 30.

The dust collecting device 1 is a device that collects dust 5 in the outdoor air that has fallen from the outdoor air supply port 21 and has flowed into the ceiling 20. Details of the dust collecting device 1 according to the first embodiment will be described below.

FIG. 2 is a perspective view of the dust collecting device according to the first embodiment. FIG. 3 is a perspective view of a brush included in the dust collecting device according to the first embodiment. FIG. 4 is a vertical cross-sectional view schematically showing the dust collecting device according to the first embodiment.
The dust collecting device 1 has a dust collecting unit 1A and a dust charging unit 1B provided on the upstream side of the dust collecting unit 1A. The dust collecting device 1 is formed with an air passage 16 in which the dust charging unit 1B and the dust collecting unit 1A flow in this order. The dust collecting unit 1A has a configuration in which a plurality of rotationally driven collecting plates 2, a collecting plate charging unit 3, and a dust box 4 are housed in a housing 15A. The dust charging unit 1B has a configuration in which the ion generating means 51 is housed in the housing 15B.

(Dust collector 1A)
The housing 15A has a suction port 14a and a discharge port 14b. In the housing 15A, an air passage 16A is formed in which the air sucked from the suction port 14a is exhausted from the discharge port 14b. The air passage 16A constitutes the downstream side of the air passage 16. As shown in FIG. 1, the dust collecting device 1 is provided in the air supply air passage 30 of the air conditioner. Therefore, the outdoor air flowing in from the outdoor air supply port 21 passes through the dust collecting device 1.

The collection plate 2 is, for example, a PP (Polypropylene) circular plastic plate having a thickness of 1 mm, a diameter of 300 mm, and a negative triboelectric tendency. However, the material of the collecting plate 2 is not limited to PP, and may be, for example, a resin material such as vinyl chloride or Teflon (registered trademark). A plurality of collection plates 2 are arranged in a direction intersecting the passage direction of the outdoor air in the housing 15A, for example, with an interval of 3 mm. A hole through which the square pillar portion of the first shaft 8 communicates is formed in the central portion of the collecting plate 2, and the first shaft 8 penetrates the hole.

The collecting plate charging unit 3 has a plurality of brushes 3a arranged in parallel. The brush 3a rubs the surface of the collecting plate 2, charges the surface of the collecting plate 2 with static electricity, and removes the dust 5 collected by the collecting plate 2. As shown in FIG. 3, the brush 3a has a structure in which, for example, a non-woven fabric 3ab of PA6 (Polyamide 6) fiber having a positive triboelectric tendency is attached to a rectangular support plate 3aa of aluminum having a thickness of 1 mm. Has. The non-woven fabric 3ab is a flexible friction body. However, the material of the non-woven fabric 3ab is not limited to PA6, and may be, for example, nylon or cotton. The fibers of the non-woven fabric 3ab are preferably mixed with carbon, metal, or the like to have conductivity. Further, two mounting holes 3ac are formed in the support plate 3aa of the brush 3a, and the second shaft 9 is inserted into each mounting hole 3ac to connect the brushes 3a.

Here, an example in which the collection plate 2 is negatively charged is shown, but it may be positively charged. When the collecting plate 2 is positively charged, the material of the collecting plate 2 may be PA6, or PTFE (PolyTetraFluoroEthylene) having a strong negative charging tendency may be used as the material of the non-woven fabric 3ab of the brush 3a.

The brush 3a is inserted into the gap between the collection plates 2 so that the non-woven fabric 3ab comes into contact with the surface of the collection plate 2, and is arranged on the downstream side of the collection plate 2. Further, the brush 3a is arranged between the collection plates 2 in a posture along the passing direction of the outdoor air so that the ventilation resistance to the outdoor air passing through the housing 15A is reduced. In the dust collecting device 1 of the first embodiment, the brush 3a is arranged in a horizontal posture. Such an arrangement of the brush 3a is effective in reducing the ventilation resistance. Further, each brush 3a is connected to the ground. The brush 3a is in contact with a part of the collection plate 2, and when the collection plate 2 is rotated, the brush 3a moves relative to the collection plate 2 and is in contact with the entire collection plate 2. Is.

The brush 3a may have a brush shape, a sponge shape, a plate shape, or the like, in addition to the non-woven fabric shape. Further, although the brush 3a is arranged on the downstream side of the first shaft 8 of the collecting plate 2, it may be arranged on the upstream side of the first shaft 8 of the collecting plate 2. When the brush 3a is arranged on the upstream side of the first shaft 8, the dust box 4 may also be arranged on the upstream side of the first shaft 8 and below the brush 3a.

In the housing 15A, a dust box 4 for collecting agglomerates 17 which are lumps of dust and the like adhering to the collection plate 2 is arranged below the brush 3a. The agglomerates 17 adhering to the collection plate 2 are wiped off by the brush 3a and collected in the dust box 4.

Further, in the housing 15A, the first baffle material 18 and the second baffle material 19 are further arranged so as to face each other vertically with the collecting plate 2 sandwiched between them. The first baffle material 18 and the second baffle material 19 rectify the outdoor air that has passed through the dust charging unit 1B and has flowed into the dust collecting unit 1A so as to pass through the collecting plate 2. The first baffle material 18 has a curved surface shape along the outer peripheral surface of the collecting plate 2. The second baffle material 19 has a flat surface shape. The shapes of the first baffle material 18 and the second baffle material 19 are not limited to the shapes shown in FIG. 2, as long as the air is rectified so as to flow through the central portion of the collection plate 2.

Further, outside the housing 15A, a motor 6 and a control unit 7 for controlling the entire dust collecting device 1 are provided. The control unit 7 includes a drive control unit (not shown) that controls the motor 6. The control unit 7 is composed of, for example, a microprocessor unit or the like. The configuration of the control unit 7 is not limited to this. For example, the control unit 7 may be configured by an updatable device such as firmware. Further, the control unit 7 may be a program module that is executed by a command from a CPU or the like (not shown).

The motor 6 is connected to the first shaft 8 via a gear (not shown), and the rotation of the motor 6 causes the first shaft 8 to rotate.

(Dust charging part)
The dust charging unit 1B is a portion that charges the dust 5 by generating ions, and has a configuration in which the ion generating means 51 is housed in the housing 15B. The housing 15B has a suction port 14c and a discharge port 14d. In the housing 15B, an air passage 16B is formed in which the air sucked from the suction port 14c is exhausted from the discharge port 14d. The air passage 16B constitutes the upstream side of the air passage 16.

The ion generating means 51 generates ions for charging the dust 5 that has flowed into the housing 15B from the suction port 14c. The ion generating means 51 may generate a constant amount of ions per unit time or may change the amount of ion generation, but in the first embodiment, it will be described as generating a constant amount of ions. .. The ion generating means 51 according to one example generates ions having a polarity opposite to the charging polarity on the surface of the collecting plate 2, and charges the dust 5 to a polarity opposite to the charging polarity on the surface of the collecting plate 2. That is, in the first embodiment, since the collecting plate 2 uses a material having a negative triboelectric tendency, the ion generating means 51 generates positive ions 52a, and the positive ions 52a are generated with respect to the dust 5. By supplying the dust 5, the dust 5 is positively charged. This configuration is preferable when the dust collection performance and the like are taken into consideration.

As shown in FIG. 4, the ion generating means 51 includes a fibrous electrode 51a made of a conductive fibrous material and a high-voltage power source 51b connected to the fibrous electrode 51a. The fibrous electrode 51a has a structure in which a plurality of fibrous materials extending in the vertical direction are bundled at a central portion in the vertical direction, and is arranged on the central axis of the dust collecting device 1.

The fibrous electrode 51a generates a corona discharge at the tip of the fibrous electrode 51a by applying a high voltage supplied from the high voltage power source 51b to generate positive ions 52a. Then, the positive ions 52a are supplied to the dust 5, so that the charged dust 53 charged on the positive electrode is formed.

In the fibrous electrode 51a, the corona discharge generated from the tip is a minute discharge, so the discharge power can be minimized. Therefore, in the fibrous electrode 51a, the amount of by-products generated by corona discharge such as ozone or NOx can be suppressed. As an electrode for generating ions, for example, there is a needle-shaped electrode, but the needle-shaped electrode generates a large amount of by-products. Therefore, in the first embodiment, by using the fibrous electrode 51a as the electrode for generating ions, the dust 5 can be efficiently removed while suppressing the amount of by-products generated by the corona discharge such as ozone or NOx. It can be charged. Further, if the housing 15B is made of a conductor and is connected to the ground, or if a member connected to the ground is provided in the air passage 16B, corona discharge is likely to occur at the tip of the fibrous electrode 51a, and the discharge also occurs. Stabilize.

An operation mode may be provided in which ozone is intentionally generated by the fibrous electrode 51a to sterilize and deodorize the downstream side of the ion generating means 51. In this case, the downstream side of the ion generating means 51 can be kept clean. In order to intentionally generate ozone, the electric power of the corona discharge at the tip of the fibrous electrode 51a may be made larger than that when the dust 5 is charged for collecting the dust 5.

The configuration of the fibrous electrode 51a is not limited to the exemplary configuration. Alternatively, for example, the fibrous electrode 51a may have a configuration in which one end of each of a plurality of fibrous materials arranged in parallel is supported by a support member.

Further, the arrangement position of the fibrous electrode 51a is not limited to the exemplified position. In FIG. 4, the fibrous electrodes 51a are arranged upright, and both ends of the fibrous electrodes 51a are arranged so as to face the upper surface 15a side and the lower surface 15b side of the housing 15B. 51a may be arranged sideways. Further, although the fibrous electrode 51a is arranged on the central axis of the dust collecting device 1 in FIG. 4, it may be arranged on the upper surface 15a or the lower surface 15b of the housing 15B. Specifically, for example, the fibrous electrodes 51a are configured such that one end of a plurality of fibrous materials arranged in parallel is supported by a support member, and the support member is installed on the upper surface 15a of the housing 15B to form a plurality of fibrous materials. The other end of the material may be arranged so as to face the lower surface 15b of the housing 15B. Further, the fibrous electrodes 51a have a configuration in which one end of a plurality of fibrous materials arranged in parallel is supported by a support member, and the support member is installed on the lower surface 15b of the housing 15B to provide the other end of the plurality of fibrous materials. The portion may be arranged so that the portion faces the upper surface 15a of the housing 15B.

The operation of the dust collecting device 1 configured as described above will be described.
In the dust collecting device 1, first, a dust collecting operation is performed. The dust collecting operation is an operation of charging the surface of the collecting plate 2 with static electricity to collect the dust 5 in the air on the collecting plate 2. In the dust collection operation, the control unit 7 drives the motor 6 to rotate the first shaft 8 and rotate the collection plate 2 fixed to the first shaft 8 in the direction indicated by the arrow in FIG. Specifically, the control unit 7 rotates the collection plate 2 for, for example, several seconds. Then, after the rotation of the collecting plate 2 is stopped, the control unit 7 turns on the high-voltage power supply 51b to generate positive ions 52a from the ion generating means 51.

As described above, the brush 3a constituting the collecting plate charging portion 3 is in contact with a part of the collecting plate 2. Therefore, when the collecting plate 2 rotates, the collecting plate 2 moves relative to the brush 3a, the brush 3a comes into contact with the entire collecting plate 2, and the entire collecting plate 2 is rubbed. Due to this friction, the surface of the collecting plate 2 is charged with static electricity. Then, after the rotation of the collection plate 2 is stopped, the outdoor air is taken into the dust collection device 1. The air taken into the dust collecting device 1 passes through the dust charging unit 1B, is rectified by the first baffle material 18 and the second baffle material 19, and passes through the central portion between the collecting plates 2.

Here, when the dust 5 contained in the air passes through the dust charging unit 1B, it is charged by the positive ions 52a generated from the ion generating means 51 to have a positive electrode property opposite to the charging polarity of the collecting plate 2. The positively charged charged dust 53 is adsorbed on the collecting plate 2 by the adsorbing electrostatic force acting between the collecting plate 2 and the charged dust 53 when passing between the collecting plates 2.

By generating positive ions 52a using the ion generating means 51 in this way, a large amount of dust 5 contained in the air can be forcibly charged to the positive electrode property. Therefore, as compared with the case where the ion generating means 51 is not used, a large amount of dust 5 in the air can be subjected to an electrostatic force adsorbed on the collecting plate 2. As a result, the amount of dust 5 that is not adsorbed on the collection plate 2 is reduced, and the collection rate can be increased, and high collection performance is stabilized regardless of the charged state of the dust 15 when it flows into the air passage 16. Can be obtained.

After the above dust collection operation, the triboelectric charging operation is performed. The triboelectric charging operation is an operation of wiping off the dust 5 collected on the collecting plate 2 with a brush 3a to clean the collecting plate 2 and recharging the collecting plate 2. In the triboelectric operation, the control unit 7 drives the motor 6 to rotate the collection plate 2 for, for example, several minutes as shown by the arrows in FIG. Further, the control unit 7 turns off the high-voltage power supply 51b to stop the generation of positive ions 52a from the ion generating means 51. When the collection plate 2 rotates and the surface of the collection plate 2 rubs against the brush 3a, the dust 5 adhering to the surface of the collection plate 2 is collected by the brush 3a, and the collection plate 2 is triboelectrically charged. Then, as the dust 5 collected by the brush 3a rotates, a part of the dust 5 becomes an agglomerate 17 and adheres to the lower part of the brush 3a. When the size of the agglomerate 17 becomes larger than a certain size, it falls by gravity and is collected in the dust box 4 provided in the lower part of the brush 3a.

With the above configuration, the dust 5 that is not adsorbed by the collection plate 2 and is discharged from the dust collection device 1 is reduced, and a dust collection device that can stably obtain high collection performance can be realized.

Here, since the collecting plate 2 has a negative triboelectric tendency, an example in which the dust 5 is positively charged by positive ions 52a is shown. However, when the collecting plate 2 has a positive triboelectric tendency, the dust 5 is positively charged. Negative ions 52b may be generated by the ion generating means 51, and the dust 5 may be negatively charged. Further, the polarity of the ions generated from the ion generating means 51 is not limited to the polarity opposite to the charging polarity of the collecting plate 2, and may be set according to the charged state of the surface of the collecting plate 2. For example, when the charging polarity of the surface of the collecting plate 2 is not uniform and the positive electrode and the negative electrode are mixed, both positive ions 52a and negative ions 52b are generated, and each dust in the air is discharged to the positive electrode. It may be charged to the property or the negative electrode property. Further, when the charging polarity of the surface of the collecting plate 2 is not uniform and the positive electrode and the negative electrode are mixed, positive ions 52a may be generated from the ion generating means 51 to charge the dust 5 positively. Then, negative ions 52b may be generated from the ion generating means 51 to charge the dust 5 negatively. The charge polarity on the surface of the collection plate 2 can be determined, for example, by measurement with a surface electrometer.

Although the example in which all of the plurality of collection plates 2 are charged to the same polarity is shown here, the charging polarities may be different for each collection plate 2. That is, the collection plate 2 charged in the positive electrode property and the collection plate 2 charged in the negative electrode property may be mixed. In the case of this configuration, both positive ions 52a and negative ions 52b are generated from the dust charging unit 1B. As a result, the positively charged dust 5 is collected by the negatively charged collection plate 2, and the negatively charged dust 5 is collected by the positively charged collection plate 2.

Although not shown, if an air filter is provided after the dust collecting device 1, dust 5 having a fine particle size can be collected.

Further, in the first embodiment, the case where the first shaft 8 is composed of one shaft is described, but a plurality of shafts may be connected in the axial direction.

Further, in the first embodiment, the dust collecting unit 1A and the dust charging unit 1B are formed in separate housings, but the dust collecting unit 1A and the dust charging unit 1B may be formed together in one housing.

-First modification of the embodiment-
FIG. 5 is a vertical cross-sectional view schematically showing a first modification of the dust collecting device according to the first embodiment.
The ion generating means 51 of the dust charging unit 1B in the dust collecting device 1 according to the first modification includes a soft X-ray ionizer 51c that generates ions by soft X-rays. The soft X-ray ionizer 51c is controlled by the ionizer control unit 51d. The ionizer control unit 51d is controlled by the control unit 7. The soft X-ray ionizer 51c can ionize air without generating ozone and NOx. The soft X-ray ionizer 51c irradiates the air flowing into the housing 15B with soft X-rays under the control of the ionizer control unit 51d. This causes the air to be ionized. The generated ions charge the dust 5.

Note that FIG. 5 shows an example in which two soft X-ray ionizers 51c are arranged on the upper surface 15a and the lower surface 15b of the housing 15B so that ions are irradiated in the directions facing each other. However, the number and placement positions of the soft X-ray ionizers 51c are not limited to the examples. For example, one soft X-ray ionizer 51c may be arranged on the upper surface 15a or the lower surface 15b of the housing 15B. Further, the two soft X-ray ionizers 51c may be arranged on the central axis of the dust collecting device 1 so that ions are irradiated in opposite directions to each other.

-Second variant of the embodiment-
FIG. 6 is a vertical cross-sectional view schematically showing a second modification of the dust collecting device according to the first embodiment.
The ion generating means 51 of the dust charging unit 1B in the dust collecting device 1 according to the second modification 2 generates ions by utilizing the photoelectric effect, and includes an ultraviolet light source 51e and a photoelectronic material 51g. The ultraviolet light source 51e is controlled by the light source control unit 51f. The light source control unit 51f is controlled by the control unit 7. The ion generating means 51 utilizing the photoelectric effect can ionize air without generating ozone and NOx, like the soft X-ray ionizer 51c. The soft X-ray ionizer 51c needs to be notified when it is used, but the ion generating means 51 using the photoelectric effect does not need to be notified, so that it is easier to use than the soft X-ray ionizer 51c.

The ultraviolet light source 51e is arranged on the upper surface 15a and the lower surface 15b of the housing 15B. The photoelectronic material 51g is formed in a plate shape and is arranged on the central axis of the dust collecting device 1 so that the surface of the photoelectronic material is opposed to the irradiation surface of the ultraviolet light source 51e. The ultraviolet light source 51e irradiates the photoelectronic material 51g with ultraviolet rays under the control of the light source control unit 51f. Photoelectrons are generated from the surface of the optoelectronic material 51g due to the photoelectric effect associated with ultraviolet irradiation, and the air flowing into the housing 15B is ionized by the photoelectrons. The generated ions charge the dust 5.

The number and placement position of the ultraviolet light source 51e and the photoelectronic material 51g are not limited to the exemplified positions. For example, the ultraviolet light source 51e may be arranged only on the upper surface 15a of the housing 15B, and the optoelectronic material 51g may be arranged on the lower surface 15b of the housing 15B so as to face the irradiation surface of the ultraviolet light source 51e. Further, the ultraviolet light source 51e may be arranged only on the lower surface 15b of the housing 15B, and the optoelectronic material 51g may be arranged on the upper surface 15a of the housing 15B so as to face the irradiation surface of the ultraviolet light source 51e.

As described above, the dust collecting device 1 of the first embodiment is a dust collecting device that collects the dust 5 contained in the air passing through the air passage 16 by the friction collecting plate 2. is there. The dust collecting device 1 is arranged on the upstream side of the collecting plate 2 in the air passing direction, and generates ions so as to be collected by the collecting plate 2 by receiving the electrostatic force attracted by the dust 5, and the dust 5 The dust charging unit 1B for charging the dust charging unit 1B is provided.

In this way, the dust 5 contained in the air is forcibly charged by the dust charging unit 1B so as to be collected by the collecting plate 2 by receiving the electrostatic force to be adsorbed, so that the dust 5 is adsorbed to the collecting plate 2. The amount of dust 5 that is not collected can be reduced, and high collection performance can be stably obtained.

The dust charging unit 1B includes any one of "fibrous electrode 51a", "soft X-ray ionizer 51c", and "ultraviolet light source 51e and optoelectronic material 51g". When the dust charging unit 1B is provided with the fibrous electrode 51a, the dust 5 can be efficiently charged while suppressing the amount of by-products generated by corona discharge such as ozone and NOx. When the dust charging unit 1B is provided with the soft X-ray ionizer 51c, the dust 5 can be efficiently charged without generating ozone and NOx. When the dust charging unit 1B is provided with the ultraviolet light source 51e and the photoelectronic material 51g, the dust 5 can be efficiently charged by means that are easier to handle than soft X-rays without generating ozone and NOx. .. Further, when the dust charging unit 1B is configured to include the fibrous electrode 51a, if ozone is generated, the portion of the dust collecting device 1 that collects the dust 5 can be kept clean.

The dust charging unit 1B charges the dust 5 to a polarity opposite to the charging polarity of the collecting plate 2.

In this way, the dust 5 contained in the air is forcibly charged by the dust charging unit 1B to a polarity opposite to the charging polarity of the collecting plate 2, so that the dust 5 not adsorbed on the collecting plate 2 is reduced. It is possible to stably obtain high collection performance. The charging polarity of the collecting plate 2 here refers to the main charging polarity of the collecting plate 2. That is, the charging polarity of the collecting plate 2 refers to the polarity determined based on the charging tendency of the material used as the material of the collecting plate 2. The surface of the collecting plate 2 after the collecting plate 2 is triboelectrically charged with the brush 3a is not limited to the case where the main charging polarity of the collecting plate 2 is uniformly charged, and the positive electrode portion and the negative electrode portion are formed. May be mixed. Even if they are mixed in this way, the charging polarity of the collecting plate 2 refers to the main charging polarity of the collecting plate 2 to the last.

The dust collecting device 1 of the first embodiment includes a brush 3a arranged so as to come into contact with the surface of the collecting plate 2, and a motor 6 for rotating the collecting plate 2. Further, the dust collecting device 1 controls the motor 6 to rotate the collecting plate 2, wipes off the dust 5 collected by the collecting plate 2 with the brush 3a to clean the collecting plate 2, and also cleans the collecting plate 2 with the brush 3a. The control unit 7 is provided to perform a triboelectric charging operation in which the collection plate 2 is charged by the friction of the above.

In this way, the collection plate 2 can be charged by friction with the brush 3a due to the rotation of the collection plate 2, and the collection plate 2 can be cleaned at the same time.

Embodiment 2.
The dust collecting device 100 according to the second embodiment basically has the same configuration as the dust collecting device 1 according to the first embodiment, but is different in that it includes an ion removing electrode 54. Hereinafter, the points where the second embodiment is different from the first embodiment will be mainly described, and the configuration not described in the second embodiment is the same as that of the first embodiment.

FIG. 7 is a perspective view of the dust collecting device according to the second embodiment. FIG. 8 is a vertical cross-sectional view schematically showing the dust collecting device according to the second embodiment. FIG. 9 is a schematic cross-sectional view of a configuration in which the ion removing electrode included in the dust collecting device according to the second embodiment is directly connected to the ground. FIG. 10 is a schematic cross-sectional view of a configuration in which the ion removing electrode included in the dust collecting device according to the second embodiment is connected to the ground via a DC power supply.

As shown in FIG. 7, the dust collecting device 100 of the second embodiment includes an ion removing electrode 54 between the dust charging unit 1B and the dust collecting plate 2, specifically, the suction port 14a of the dust collecting unit 1A. .. The ion removing electrode 54 is made of a conductive material. The ion removing electrode 54 has, for example, a mesh-like metal plate. The ion removing electrode 54 is arranged in the air passage 16 so that the charged dust 53 passes through the opening 54a of the mesh of the metal plate. The ion removing electrode 54 is directly connected to the ground as shown in FIG. 9 and kept at the ground potential. Alternatively, the ion removing electrode 54 is connected to the ground via the DC power supply 55 as shown in FIG. In this case, by applying a DC voltage having the same negative electrode property as the charging polarity of the collecting plate 2 from the DC power supply 55 to the ion removing electrode 54, the ion removing electrode 54 has the same negative electrode property as the charging potential of the collecting plate 2. It is kept at potential. The charging polarity of the collecting plate 2 refers to the main polarity as described above.

If the cations 52a in the air pass between the collection plates 2 as they are without being adsorbed by the dust 5, the cations 52a may eliminate the static electricity in the collection plates 2. Therefore, in the second embodiment, the collection plate 2 is statically eliminated by removing the cations 52a flowing between the collection plates 2 by using the ion removal electrode 54 during the dust collection operation. prevent.

Next, the operation of the ion removing electrode 54 will be described. Between the "cation 52a or the charged dust 53" and the "ion removal electrode 54 grounded as shown in FIG. 9 or the ion removal electrode 54 having a potential of the opposite polarity to itself as shown in FIG. 10" An electric field is formed. Therefore, when the positive ions 52a or the charged dust 53 in the air flowing through the air passage 16 pass near the ion removing electrode 54, they receive an electrostatic force from an electric field and are attracted to the ion removing electrode 54. At this time, since the charged dust 53 having a mass larger than that of the cation 52a has a larger inertia in the air passing direction than the cation 52a, the charged dust 53 is attracted to the ion removing electrode 54, but the opening 54a of the ion removing electrode 54 is opened. It passes through and flows to the downstream side of the ion removing electrode 54.

However, the cation 52a, which has an extremely small inertia as compared with the charged dust 53, is attracted to the ion removing electrode 54 and flows into the ion removing electrode 54. As a result, the cations 52a are removed from the air, and it is possible to prevent the collection plate 2 from being statically eliminated by the cations 52a.

As described above, the ion removing electrode 54 shown in FIG. 10 has a negative electrode having the same negative electrode property as the charging polarity of the collecting plate 2 by applying a DC voltage having the same negative electrode property as the charging polarity of the collecting plate 2. It is kept at the sexual potential. Therefore, as compared with the ion removing electrode 54 shown in FIG. 9, positive ions 52a having a polarity opposite to the charging polarity of the collecting plate 2 can be removed more reliably, and the collecting plate 2 is more reliably discharged. Can be prevented. When a DC voltage is applied, the applied DC voltage may be ± 500 V or less, more preferably ± 100 V or less.

Here, as the thickness d of the ion removing electrode 54 in the air passing direction becomes longer, the charged dust 53 is more likely to be attracted to the ion removing electrode 54, cannot pass through the opening 54a, and adheres to the ion removing electrode 54. However, the ion removing electrode 54 is soiled. Therefore, the thickness d of the ion removing electrode 54 is set within a thickness range in which the charged dust 53 is not adsorbed. That is, the thickness d of the ion removing electrode 54 is set to a thickness at which the charged dust 53 passes through the opening 54a without being adsorbed and adhered to the inner peripheral surface 54a of the opening 54a. As a result, the ion removing electrode 54 can be prevented from being contaminated by the charged dust 53, and maintenance of the ion removing electrode 54 can be eliminated.

As described above, according to the second embodiment, the same effect as that of the first embodiment can be obtained, and the following effects can be obtained. That is, the dust collecting device 100 of the second embodiment is arranged between the dust charging unit 1B and the collecting plate 2, and the ion removing electrode 54 into which ions having a polarity opposite to the charging polarity of the collecting plate 2 flow in. To be equipped.

As a result, ions having a polarity opposite to the charging polarity of the collecting plate 2 that did not contribute to dust charging can be removed by the ion removing electrode 54. Therefore, it is possible to prevent the collection plate 2 from being statically eliminated by ions having a polarity opposite to the charge polarity of the collection plate 2, and it is possible to stably obtain high collection performance.

The ion removing electrode 54 is designed to be maintained at a potential having the same polarity as the ground potential or the charging potential of the collection plate 2.

In this way, by keeping the ion removing electrode 54 at the ground potential or the potential having the same polarity as the charging potential of the collecting plate 2, ions having a polarity opposite to the charging polarity of the collecting plate 2 can be removed. When the ion removing electrode 54 is maintained at a potential having the same polarity as the charging potential of the collecting plate 2, ions having a polarity opposite to the charging polarity of the collecting plate 2 can be removed more reliably.

The ion removing electrode 54 has a mesh-like metal plate, and is arranged in the air passage 16 so that the dust 5 passes through the opening 54a of the mesh. The thickness of the metal plate in the air passage direction is such that the dust 5 charged by the dust charging portion 1B passes through the opening 54a without being adsorbed on the inner peripheral surface 54a of the opening 54a of the metal plate. Is set to.

As a result, the adhesion of dust to the ion removing electrode 54 is suppressed, and maintenance can be eliminated.

Embodiment 3.
The dust collecting device 200 according to the third embodiment basically has the same configuration as the dust collecting device according to the first and second embodiments, but has the environment detection unit 11 and the ion generation amount integrating unit 51h. It differs in that it further provides. Hereinafter, the third embodiment will be described focusing on the differences from the first and second embodiments, and the configurations not described in the third embodiment are the same as those of the first and second embodiments. is there.

FIG. 11 is a vertical cross-sectional view schematically showing the dust collecting device according to the third embodiment.
As shown in FIG. 11, the dust collecting device 200 of the third embodiment includes an ion removing electrode 54, an environment detection unit 11, and an environment detection unit 11 in addition to the dust collecting device 1 of the first embodiment shown in FIG. It is provided with an ion generation amount integrating unit 51h.

The environment detection unit 11 is a part that detects the air environment in the air passage 16, and includes a dust concentration detection unit 12 and a humidity detection unit 13. The dust concentration detecting unit 12 is a portion that detects the dust concentration in the air passage 16. The dust concentration detection unit 12 detects the dust concentration on the upstream side of the collection plate 2 in the air passage 16 and the dust concentration on the downstream side of the collection plate 2 in the air passage 16. It has a downstream dust concentration detecting unit 12b for detecting. The upstream dust concentration detecting unit 12a is arranged in the vicinity of the suction port 14c of the dust charging unit 1B. The downstream dust concentration detection unit 12b is arranged in the vicinity of the discharge port 14b on the downstream side of the collection plate 2. The upstream dust concentration detecting unit 12a and the downstream dust concentration detecting unit 12b are composed of a dust concentration sensor. The upstream dust concentration detecting unit 12a detects the dust concentration of the air flowing into the dust collecting device 200. The downstream dust concentration detecting unit 12b detects the dust concentration of the air discharged from the dust collecting device 200.

The humidity detection unit 13 is composed of a humidity sensor. The humidity detection unit 13 is provided in the vicinity of the suction port 14a on the upstream side of the dust charging unit 1B, and detects the humidity of the air flowing into the dust collecting device 200.

The ion generation amount integrating unit 51h integrates the ion generation amount per unit time in the dust charging unit 1B to calculate the total ion generation amount. The ion generation amount integrating unit 51h is functionally configured by the control unit 7. That is, the ion generation amount integrating unit 51h is provided in the control unit 7.

The control unit 7 (see FIG. 2) controls the amount of ions generated in the dust charging unit 1B based on the detection result of the dust concentration detecting unit 12 and the detection result of the humidity detecting unit 13. Further, the control unit 7 controls the timing of the triboelectric operation based on the calculation result of the ion generation amount integrating unit 51h.

Next, the control of the amount of ions generated based on the detection result of the dust concentration detection unit 12 and the detection result of the humidity detection unit 13 will be described. When the control unit 7 determines that the degree of pollution of the air flowing into the air passage 16 is high based on the dust concentration detected by the upstream dust concentration detection unit 12a, the control unit 7 determines the amount of ions generated in the dust charging unit 1B. Increase the charging efficiency of the dust 5. Specifically, when the dust concentration detected by the upstream dust concentration detecting unit 12a is equal to or higher than the preset concentration, the control unit 7 determines that the air pollution degree is high, and the dust charging unit 1B determines. Increase the amount of ions generated. As a result, even if highly polluted air flows into the dust collecting device 200, high collecting performance can be stably obtained.

Further, when the dust concentration detected by the upstream dust concentration detecting unit 12a is less than the set concentration, the control unit 7 determines that the degree of pollution of the inflow air is low, and reduces the amount of ions generated in the dust charging unit 1B. Or, turn off the dust charging unit 1B. As a result, the power consumption of the dust charging unit 1B can be suppressed.

Further, when the collection performance of the dust collecting device 200 is deteriorated, the control unit 7 increases the amount of ions generated in the dust charging unit 1B to increase the charging efficiency of the dust 5 and recover the lowered collection performance. Specifically, the control unit 7 presets the difference between the dust concentration of the inflow air detected by the upstream dust concentration detection unit 12a and the dust concentration of the exhaust air detected by the downstream dust concentration detection unit 12b. If it is lower than the set concentration difference, it is determined that the collection performance of the dust collection device 200 has deteriorated, and the amount of ions generated in the dust charging unit 1B is increased. As a result, the collection performance can be automatically kept constant.

Further, when the humidity of the inflow air detected by the humidity detection unit 13 is equal to or higher than the preset humidity, the control unit 7 increases the amount of ions generated in the dust charging unit 1B to increase the charging efficiency of the dust 5. As the humidity increases, the electrical resistance decreases, so that the amount of charge of the dust 5 flowing into the air passage 16 also decreases, and the amount of charge of the collection plate 2 tends to decrease. That is, when the humidity becomes high, the collection performance tends to decrease. Therefore, when the humidity of the inflow air detected by the humidity detection unit 13 is equal to or higher than the preset humidity, the amount of ions generated by the dust charging unit 1B is increased so that the collection performance is not deteriorated. As a result, it is possible to prevent the collection performance from fluctuating due to humidity fluctuations, and the collection performance can be automatically kept constant.

Although the configuration in which the environment detection unit 11 includes both the dust concentration detection unit 12 and the humidity detection unit 13 has been described here, the configuration may include only one of them. Further, the set concentration or the set concentration difference and the set humidity can be appropriately set according to the test result before mounting the dust collector 200 on the air conditioner or the situation after mounting. Further, when increasing or decreasing the amount of ion generation based on the detection result of the environment detection unit 11, it is possible to appropriately set how much the amount of ion generation is increased or decreased.

Next, the timing control of the triboelectric operation based on the calculation result of the ion generation amount integrating unit 51h will be described. The triboelectric charging operation of the collecting plate 2 is performed when the dust 5 flowing into the dust collecting device 200 reaches a certain amount, or when the degree of charging of the collecting plate 2 is attenuated to some extent from the previous triboelectric charging operation. It is appropriate to do it. As described above, the amount of ions generated in the dust charging unit 1B is controlled based on the detection result of the dust concentration detecting unit 12 and the detection result of the humidity detecting unit 13. Therefore, the integrated value of the amount of ion generated from a certain time to a certain time correlates with the total amount of dust 5 flowing into the dust collecting device 200 and the charge attenuation characteristic of the collecting plate 2 in that time range.

Therefore, when the total amount of ions generated calculated by the ion generation amount integrating unit 51h reaches the preset total amount, the control unit 7 determines that it is the timing to perform the triboelectric charging operation of the collection plate 2, and performs the triboelectric charging operation. I do. This makes it possible to perform the triboelectric operation automatically and at an appropriate timing. The total amount of ions generated can be appropriately set according to the test result before mounting the dust collector 200 on the air conditioner or the situation after mounting.

Further, although the configuration in which the ion generation amount integrating unit 51h is further provided in the configuration provided with the dust concentration detecting unit 12 has been described here, the ion generation amount integrating unit 51h is described in the first embodiment in which the dust concentration detecting unit 12 is not provided. May be provided. Then, the total amount of ions generated from the ion generating means 51 that generates a certain amount of ions per unit time is calculated by the ion generation amount integrating unit 51h, and when the total amount of ions generated reaches a preset total amount, the collection plate It may be determined that it is the timing at which the triboelectric charging operation of 2 is performed.

Further, when the triboelectric operation is performed, the dust 5 adsorbed on the surface of the collection plate 2 is statically removed, so that the efficiency of removing the dust 5 in the triboelectric operation is improved. The static elimination of the dust 5 adsorbed on the surface of the collection plate 2 will be described with reference to FIGS. 12 and 13 below.

FIG. 12 is a diagram showing a state of the dust collecting device according to the third embodiment during the dust collecting operation. FIG. 13 is a diagram showing a state of the dust collecting device according to the third embodiment during a triboelectric charging operation.
First, during the dust collecting operation shown in FIG. 12, the control unit 7 generates positive ions 52a from the ion generating means 51 of the dust charging unit 1B to charge the dust 5 contained in the air. Further, the control unit 7 applies a negative electrode DC voltage having the same negative polarity as the charging polarity of the collecting plate 2 from the DC power supply 55 to the ion removing electrode 54, and removes the positive ions 52a by the ion removing electrode 54. As a result, the positive ions 52a are removed downstream of the ion removing electrode 54. Note that FIG. 12 shows a state in which the rotation of the collection plate 2 is stopped during the dust collection operation and the charged dust 53 is collected on the collection plate 2.

In the triboelectric operation shown in FIG. 13, the collection plate 2 is rotating in the direction indicated by the arrow in the figure as described above. Then, the control unit 7 generates negative ions 52b having the same polarity as the charging polarity of the collecting plate 2 from the ion generating means 51 of the dust charging unit 1B. Further, the control unit 7 applies a negative electrode DC voltage having the same negative polarity as the charging polarity of the collecting plate 2 from the DC power supply 55 to the ion removing electrode 54, as in the case of the dust collecting operation. In the housing 15B, in addition to the negative ions 52b generated from the ion generating means 51, the positive ions 52a are also mixed. As described above, among the positive and negative ions in the housing 15B, the positive ions 52a are removed by the ion removing electrode 54, and the negative ions 52b flow into the housing 15A without being removed by the ion removing electrode 54, and the collection plate. Pass through the gap between the two.

By passing negative ions 52b having the same polarity as the charging polarity of the collecting plate 2 through the gap between the collecting plates 2, the charged dust 53 adsorbed on the surface of the collecting plate 2 is statically eliminated. In FIG. 13, the statically eliminated dust 5 is shown as dust 56. Since the dust 56 thus statically removed has a weak adsorption force with the collection plate 2, it is easily wiped off by the brush 3a, and the dust 56 is efficiently cleaned.

As described above, the dust collecting device 200 of the third embodiment has the same effect as that of the first embodiment and the second embodiment, and also has the following effects. That is, the dust collecting device 200 of the third embodiment is controlled by the environment detecting unit 11 that detects the environment in the air passage 16 and the control that controls the amount of ions generated in the dust charging unit 1B based on the detection result of the environment detecting unit 11. A unit 7 is provided. As a result, the collection performance is stable regardless of the air environment in the air passage 16.

The environment detection unit 11 includes a dust concentration detection unit 12 having an upstream dust concentration detection unit 12a that detects the dust concentration on the upstream side of the collection plate 2 in the air passage 16. When the dust concentration detected by the upstream dust concentration detecting unit 12a is equal to or higher than a preset set concentration, the control unit 7 increases the amount of ions generated in the dust charging unit 1B.

As a result, even if highly polluted air flows into the dust collecting device 200, high collecting performance can be stably obtained.

Further, when the dust concentration detected by the upstream dust concentration detecting unit 12a is less than the preset concentration, the control unit 7 reduces the amount of ions generated in the dust charging unit 1B or turns off the dust charging unit 1B.

This makes it possible to prevent wasteful power consumption in the dust charging unit 1B.

The dust concentration detection unit 12 further includes a downstream dust concentration detection unit 12b that detects the dust concentration on the downstream side of the collection plate 2 in the air passage 16. When the difference between the dust concentration detected by the upstream dust concentration detecting unit 12a and the dust concentration detected by the downstream dust concentration detecting unit 12b is lower than the preset concentration difference, the control unit 7 is charged with dust. Increase the amount of ions generated in Part 1B.

This makes it possible to stably obtain high collection performance.

The environment detection unit 11 includes a humidity detection unit 13 that detects the humidity in the air passage 16, and the control unit 7 is a dust charging unit 1B when the humidity detected by the humidity detection unit 13 is equal to or higher than a preset set humidity. Increase the amount of ions generated.

This makes it possible to prevent the collection performance from fluctuating due to humidity fluctuations.

The dust collecting device 200 of the third embodiment is provided in the control unit 7, and includes an ion generation amount integrating unit 51h that integrates the ion generation amount in the dust charging unit 1B. The control unit 7 performs a triboelectric charging operation when the total amount of ions generated by the ion generation amount integrating unit 51h reaches a preset total amount.

This makes it possible to perform the triboelectric operation automatically and at an appropriate timing.

During the triboelectric charging operation, the control unit 7 generates ions having the same polarity as the charging potential of the collecting plate 2 from the dust charging unit 1B.

As a result, high collection performance can be stably obtained in the dust collection operation, and in the triboelectric operation, the collection plate is generated by ions having the same polarity as the charge potential of the collection plate 2 generated from the dust charging unit 1B. 2 can be statically eliminated, and dust 5 can be efficiently removed from the surface of the collection plate 2.

1 dust collecting device, 1A dust collecting part, 1B dust charging part, 2 collecting plate, 3 collecting plate charging part, 3a brush, 3aa support plate, 3ab non-woven fabric, 3ac mounting hole, 4 dust box, 5 dust, 6 motor, 7 Control unit, 8 1st shaft, 9 2nd shaft, 10 Heat exchange ventilator, 11 Environmental detection unit, 12 Dust concentration detection unit, 12a Upstream dust concentration detection unit, 12b Downstream dust concentration detection unit, 13 Humidity detection Part, 14a suction port, 14b discharge port, 14c suction port, 14d discharge port, 15A housing, 15B housing, 15a upper surface, 15b lower surface, 16 air passage, 16A air passage, 16B air passage, 17 aggregate, 18th 1 baffle material, 19 second baffle material, 20 ceiling, 21 outdoor air supply port, 22 outdoor exhaust port, 23 indoor air supply port, 24 indoor exhaust port, 30 air supply air passage, 31 duct, 40 exhaust air passage, 41 duct , 51 ion generating means, 51a fibrous electrode, 51b high pressure power supply, 51c soft X-ray ionizer, 51d ionizer control unit, 51e ultraviolet light source, 51f light source control unit, 51g photoelectron material, 51h ion generation amount integrating unit, 52a positive ion, 52b Negative ion, 53 charged dust, 54 ion removing electrode, 54a opening, 54aa inner peripheral surface, 55 DC power supply, 56 dust, 100 dust collecting device, 200 dust collecting device.

Claims

In a dust collecting device that collects dust contained in the air passing through the air passage with a dust collecting plate charged by friction.
Dust charging, which is arranged on the upstream side of the collecting plate in the air passing direction, receives an electrostatic force that the dust is adsorbed, generates ions so as to be collected by the collecting plate, and charges the dust. A dust collecting device equipped with a part.
The dust collecting device according to claim 1, wherein the dust charging unit includes a fibrous electrode.
The dust collecting device according to claim 2, wherein the dust charging unit generates ozone.
The dust collecting device according to claim 1, wherein the dust charging unit includes a soft X-ray ionizer.
The dust collecting device according to claim 1, wherein the dust charging unit includes an ultraviolet light source and a photoelectronic material.
The dust collecting device according to any one of claims 1 to 5, wherein the dust charging unit charges the dust to a polarity opposite to the charging polarity of the collecting plate.
Any one of claims 1 to 6, which is arranged between the dust charging unit and the collecting plate and includes an ion removing electrode into which ions having a polarity opposite to the charging polarity of the collecting plate flow in. The dust collecting device described in the section.
The dust collecting device according to claim 7, wherein the ion removing electrode is maintained at a ground potential or a potential having the same polarity as the charging potential of the collecting plate.
The ion removing electrode has a mesh-like metal plate, is arranged in the air passage so that the dust passes through the opening of the mesh, and the thickness of the metal plate in the air passing direction is the thickness of the dust. The seventh or eighth aspect of the present invention, wherein the dust charged by the charged portion is set to a thickness that allows the dust to pass through the opening without being adsorbed on the inner peripheral surface of the opening of the metal plate. Dust collecting device.
A brush arranged so as to be in contact with the surface of the collection plate,
The motor that rotates the collection plate and
The motor is controlled to rotate the collection plate, and the dust collected by the collection plate is wiped off by the brush to clean the collection plate, and the collection plate is cleaned by friction with the brush. The dust collecting device according to any one of claims 1 to 9, further comprising a control unit that performs a triboelectric charging operation.
It is equipped with an environment detection unit that detects the environment in the air passage.
The dust collecting device according to claim 10, wherein the control unit controls the amount of ions generated in the dust charging unit based on the detection result of the environment detecting unit.
The environment detection unit includes a dust concentration detection unit having an upstream dust concentration detection unit that detects the dust concentration on the upstream side of the collection plate in the air passage.
The dust collecting device according to claim 11, wherein the control unit increases the amount of ions generated in the dust charging unit when the dust concentration detected by the upstream dust concentration detecting unit is equal to or higher than a preset set concentration.
The control unit reduces the amount of ions generated in the dust charging unit or turns off the dust charging unit when the dust concentration detected by the upstream dust concentration detecting unit is less than a preset setting concentration. The dust collecting device described in.
The dust concentration detecting unit further includes a downstream dust concentration detecting unit that detects the dust concentration on the downstream side of the collecting plate in the air passage.
When the difference between the dust concentration detected by the upstream dust concentration detecting unit and the dust concentration detected by the downstream dust concentration detecting unit is lower than the preset concentration difference, the control unit determines the dust. The dust collecting device according to claim 12 or 13, which increases the amount of ions generated in the charged portion.
The environment detection unit includes a humidity detection unit that detects the humidity in the air passage.
The dust collection unit according to any one of claims 11 to 14, wherein when the humidity detected by the humidity detection unit is equal to or higher than a preset set humidity, the control unit increases the amount of ions generated in the dust charging unit. device.
The control unit is provided with an ion generation amount integrating unit that integrates the ion generation amount in the dust charging unit.
The control unit according to any one of claims 10 to 15 performs the triboelectric charging operation when the total amount of ions generated by the total amount of ions generated by the ion generation amount integration unit reaches a preset total amount. Dust collecting device.
The control unit controls the motor to rotate the collecting plate to charge the collecting plate, and during the dust collecting operation of collecting the dust contained in the air by the collecting plate. , The dust charging portion generates ions having the opposite polarity to the charging polarity of the collecting plate, and during the triboelectric charging operation, ions having the same polarity as the charging potential of the collecting plate are generated from the dust charging portion. The dust collecting device according to any one of claims 10 to 16.
An air conditioner equipped with the dust collecting device according to any one of claims 1 to 17.