JP2022174414A - Air cleaner and air cleaner unit - Google Patents

Abstract

To enable downsizing and excellent dust collection efficiency.SOLUTION: An air cleaner 1 includes: a fan 20 for generating flow of air by rotation drive; a filter 41 as a collection part for permitting circulation of air and collecting dust in air; a fan friction part 25 integrated with the fan 20, rubbed by rotation drive of the fan 20, and producing static electricity; and a projection part 35 integrated with a friction body 31 arranged oppositely to the fan 20 and having an opening 33 permitting circulation of air, as a facing friction part facing the fan 20, disposed so as to come in contact with or be adjacent to the filter 41, contacting the fan friction part 25 of the fan 20, and producing static electricity due to friction against the fan friction part 25 by rotation drive of the fan 20.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an air purifier and an air purifier unit that can collect dust in the air using static electricity generated by friction, and more particularly to a small portable air purifier and air purifier unit. is.

In recent years, due to the tendency to emphasize the quality of life and the heightened awareness of health, as well as concerns about health hazards caused by PM2.5, yellow dust, pollen, and air pollution, pollen and cigarette smoke are floating in the air. Air purifiers that remove dust containing solid or liquid particles such as odorous gases, microorganisms floating in the air, etc. are widely used in homes, offices, and the like.

For example, a fan-type air purifier removes dust such as particles floating in the air by passing air sucked by the rotation of the fan through a filter.
However, in such a filter that collects and filters dust such as particles in the air, the size of the captured particles depends on the mesh size of the filter. will increase the pressure loss. Therefore, in order to increase the collection efficiency of capturing fine particles using a fine filter, it is necessary to increase the suction force of the fan, making it difficult to achieve both collection efficiency and miniaturization.

As an air purifier other than the fan type, an electric dust collection type air purifier is also known. This electrostatic precipitator-type air purifier applies a high DC voltage to wire-like (needle-like) electrodes to cause corona discharge, and accelerated ions generated during the corona discharge charge dust in the air. The dust collecting part also has electrodes to which a high DC voltage is applied, and by applying a high voltage between the electrodes to form an electrostatic field, the charged dust is electrostatically collected in the dust collecting part. It is something to do.
However, since this electrostatic precipitator type air purifier uses discharge or high voltage for dust collection, it is inevitably large and heavy. In addition, compared to the fan type, it is difficult to handle, including safety and electrode maintenance.

Therefore, there are, for example, Patent Documents 1 and 2 as techniques for generating static electricity to collect dust in the air without applying a high voltage.
Patent Document 1 discloses a technique comprising a plurality of parallel dust collecting means, a friction means for electrifying static electricity by rubbing the outer surface of the dust collecting means, and a driving means for frictionally moving the friction means along the outer surface of the dust collecting means. and holding means for holding the dust collecting means.
Further, Patent Document 2 describes a plurality of dust collectors that are electrically charged by friction, which are arranged at intervals so as to form an air passage through which air passes, and 1 that electrifies the dust collectors by friction. At least one of the dust collectors facing each other across the air passage has one or more projections projecting toward the air passage.

JP-A-2002-336733 Retable 2019/003379

However, the dust collectors (dust collection devices) of Patent Documents 1 and 2 are based on the assumption that they are used in air conditioners. A driving means for frictionally moving a friction body (friction means) that rubs against a body (dust collecting means) is provided, and the apparatus is large-scale and expensive.

Accordingly, an object of the present invention is to provide an air purifier and an air purifier unit that can be miniaturized and have good dust collection efficiency.

The air purifier of the invention of claim 1 comprises: a fan friction part integrated with the fan which is rubbed and charged with static electricity by rotational driving of the fan generating air flow; constitutes a collecting portion that collects, or is provided in contact with or in close proximity to the collecting portion, contacts the fan friction portion, rubs against the fan friction portion due to the rotation of the fan, and is charged with static electricity; It has a facing friction portion facing the fan, and the fan friction portion and the facing friction portion that are in contact with each other rub against each other due to the rotation of the fan, thereby electrifying static electricity.

The fan is a fan that generates an air flow by rotational driving, and for example, an axial fan, a centrifugal fan, a sirocco fan, or the like can be used.

The collecting portion allows air to pass through and collects dust such as particles in the air passing therethrough. It collects and adsorbs dust such as charged particles in the air by force), and constitutes an opposing friction part that charges electrostatic force and collects dust such as charged particles there. Alternatively, the dust such as charged particles attracted by the charged electrostatic force of the opposing friction portion is brought into contact with or close to the opposing friction portion by contacting or proximate to the opposing friction portion that is charged with electrostatic force. Alternatively, the particles may be caught by a collecting part provided at the bottom. Preferably, it has a filtration-type filter function, and for example, a net-like or streak-like one, a nonwoven fabric, a knitted fabric, a woven fabric, a felt, or the like can be used.
The dust includes solid or liquid particles such as pollen, cigarette smoke, odorous gas components floating in the air, and microorganisms floating in the air.

The fan friction portion is provided integrally with the fan, and the opposing friction portion provided opposite to the fan contacts and is charged with static electricity by friction with the opposing friction portion due to the rotating movement of the fan. . It may be a part that constitutes a rotationally driven fan, or it may be formed integrally with the fan.

The opposed friction portion is provided facing the fan, contacts the fan friction portion integrated with the fan, and is charged with static electricity by friction with the fan friction portion as the fan rotates. The collecting portion may be configured or integrated with the collecting portion, or may be provided separately from the collecting portion and in contact with or in close proximity to the collecting portion.

The air purifier of the invention of claim 2 comprises: a casing having an air intake port and an air exhaust port on the peripheral surface defining a storage space of a predetermined volume; A fan friction portion that is integral with the fan that is rubbed and charged with static electricity by the rotation of the fan that generates the flow of air to be exhausted to the mouth, and a collecting portion that allows the air to flow and collects the dust in the air. or provided in contact with or in close proximity to the collecting portion, and is in contact with the fan friction portion and is charged with static electricity by friction with the fan friction portion when the fan is rotationally driven, facing the fan. and the fan friction portion and the opposing friction portion contacting each other rub against each other due to the rotation of the fan, thereby charging static electricity.

The casing forms an accommodation space of a predetermined volume for accommodating a fan or the like, and has an intake port and an exhaust port for circulating air on the peripheral surface thereof. By constructing it so that it can be freely connected to and separated from the lid that covers the opening of the main body, it is possible to freely replace the parts accommodated inside, but it may be a structure that is integral and not separated.
The fan is a fan that generates an air flow by rotational driving, and for example, an axial fan, a centrifugal fan, a sirocco fan, or the like can be used.

The collecting portion allows air to pass through and collects dust such as particles in the air passing therethrough. It collects and adsorbs dust such as charged particles in the air by force), and constitutes an opposing friction part that charges electrostatic force and collects dust such as charged particles there. Alternatively, the dust such as charged particles attracted by the charged electrostatic force of the opposing friction portion is brought into contact with or close to the opposing friction portion by contacting or proximate to the opposing friction portion that is charged with electrostatic force. Alternatively, the particles may be caught by a collecting part provided at the bottom. Preferably, it has a filtration-type filter function, and for example, a net-like or streak-like one, a nonwoven fabric, a knitted fabric, a woven fabric, a felt, or the like can be used.
The dust includes solid or liquid particles such as pollen, cigarette smoke, odorous gas components floating in the air, and microorganisms floating in the air.

The fan friction portion is provided integrally with the fan, and the opposing friction portion provided opposite to the fan contacts and is charged with static electricity by friction with the opposing friction portion due to the rotating movement of the fan. . It may be a part that constitutes a rotationally driven fan, or it may be formed integrally with the fan.

The opposed friction portion is provided facing the fan, contacts the fan friction portion integrated with the fan, and is charged with static electricity by friction with the fan friction portion as the fan rotates. The collecting portion may be configured or integrated with the collecting portion, or may be provided separately from the collecting portion and in contact with or in close proximity to the collecting portion.

The collecting part of the air purifier according to the invention of claim 3 is composed of a filtration type filter.
The above-mentioned filtering type filter may have the function of physically blocking the passage of dust contained in the air to filter and collect dust. etc. are used.

The fan friction portion of the air purifier according to the fourth aspect of the invention is a part of the fan, and has a larger friction area than the opposing friction portion. The fan friction portion has, for example, a large friction area corresponding to a hub portion or boss portion around the rotating shaft of the fan, while the opposed friction portion has a narrow friction area that contacts a part of the fan friction portion. area.

In the air purifier according to the fifth aspect of the invention, the opposed friction portion has a larger friction area than the fan friction portion. The fan friction portion is provided integrally with the fan and has a narrow friction area that contacts a part of the opposed friction portion, while the opposed friction portion has a large friction area that the fan friction portion contacts. be.

The air purifier unit of the invention of claim 6 comprises: a fan friction part integral with the fan which is rubbed and charged with static electricity by rotational driving of the fan generating air flow; or is provided in contact with or in close proximity to the collecting portion, contacts the fan friction portion, rubs against the fan friction portion due to the rotation of the fan, and is charged with static electricity , a first air purifier having a frictional portion opposed to the fan, a fan frictional portion integral with the fan that is electrically charged by being rubbed by the rotational drive of the fan that generates air flow, and air circulation or provided in contact with or in close proximity to the collecting portion, contacting the fan friction portion and rotating the fan to cause the fan friction a second air purifier having a facing friction part facing the fan, which rubs against the friction part and is charged with static electricity having a polarity opposite to the charging polarity of the facing friction part of the first air purifier, In each of the first air purifier and the second air purifier, the fan friction portion and the opposing friction portion that are in contact with each other rub against each other due to the rotation of the fan, thereby charging static electricity.

The fan is a fan that generates an air flow by rotational driving, and for example, an axial fan, a centrifugal fan, a sirocco fan, or the like can be used.

The collecting portion allows air to pass through and collects dust such as particles in the air passing therethrough. It collects and adsorbs dust such as charged particles in the air by force), and constitutes an opposing friction part that charges electrostatic force and collects dust such as charged particles there. Alternatively, the dust such as charged particles attracted by the charged electrostatic force of the opposing friction portion is brought into contact with or close to the opposing friction portion by contacting or proximate to the opposing friction portion that is charged with electrostatic force. Alternatively, the particles may be caught by a collecting part provided at the bottom. Preferably, it has a filtration-type filter function, and for example, a net-like or streak-like one, a nonwoven fabric, a knitted fabric, a woven fabric, a felt, or the like can be used.
The dust includes solid or liquid particles such as pollen, cigarette smoke, odorous gas components floating in the air, and microorganisms floating in the air.

The fan friction portion is provided integrally with the fan, and the opposing friction portion provided opposite to the fan contacts and is charged with static electricity by friction with the opposing friction portion due to the rotating movement of the fan. . It may be a part that constitutes a rotationally driven fan, or it may be formed integrally with the fan.

The opposed friction portion is provided facing the fan, contacts the fan friction portion integrated with the fan, and is charged with static electricity by friction with the fan friction portion as the fan rotates. The collecting portion may be configured or integrated with the collecting portion, or may be provided separately from the collecting portion and in contact with or in close proximity to the collecting portion.

According to the air purifier according to the invention of claim 1, there is provided a fan that generates an air flow by rotational driving, and a fan disposed on the intake side of the fan to allow the air to flow and remove dust in the air. A collecting portion that collects and a fan friction portion integral with the fan that is electrically charged by being rubbed by rotation of the fan constitutes the collecting portion, or is in contact with or close to the collecting portion. and an opposing friction portion facing the fan, which is in contact with the fan friction portion and is charged with static electricity by friction with the fan friction portion when the fan is rotationally driven. Air circulates to the generation collection part. At this time, since the fan friction portion provided integrally with the fan and the opposed friction portion arranged opposite to the fan are in contact with each other, the fan friction portion and the opposed friction portion are also rotated by the rotation of the fan. are charged with static electricity by friction. As a result, the collecting portion provided in contact with or in close proximity to the opposing friction portion, or the collecting portion configured by the opposing friction portion and integrated with the opposing friction portion, collects by the electrostatic force charged in the friction facing portion. Charged dust in the air flowing through the part is collected. In particular, according to the electrostatic force charged in the opposing frictional portion, even fine particles that are easily charged in the indoor space can be captured with low pressure loss.

Therefore, according to the air purifier of the invention of claim 1, the movement of the fan and the movement of friction are made common, and the electrostatic force charged by the friction collects the charged dust in the air. As a result, fine particles can be efficiently collected, and the size, weight, and cost can be reduced.
In particular, when a filtering-type filter is used in the collecting part, it can be provided in contact with or in close proximity to the collecting part, or can be provided integrally with the collecting part, even if the filter is not finely meshed. Due to the electrostatic force of the opposing friction part, it is possible to make the filter adsorb charged particles that are finer than the mesh of the filter. Since fine particles can be captured, high dust collection efficiency can be obtained with low pressure loss, achieving both miniaturization and high dust collection efficiency.

According to the air purifier according to the invention of claim 2, there is provided a casing having an air intake port and an air exhaust port on a peripheral surface defining an accommodation space of a predetermined volume, and an air intake port housed in the casing and sucking air from the air intake port. a fan that is rotationally driven to generate a flow of air to be exhausted to the exhaust port; and a fan disposed inside or outside the casing on the intake side of the fan to allow the air to flow and remove dust in the air. A collecting portion that collects and a fan friction portion integral with the fan that is electrically charged by being rubbed by rotation of the fan constitutes the collecting portion, or is in contact with or close to the collecting portion. and a facing friction portion facing the fan, which is in contact with the fan friction portion and is charged with static electricity by friction with the fan friction portion when the fan is rotationally driven. Outside air is taken in through the port, and an air flow is generated that flows through the collecting portion and is exhausted through the exhaust port. At this time, since the fan friction portion provided integrally with the fan and the opposed friction portion arranged opposite to the fan are in contact with each other, the fan friction portion and the opposed friction portion are also rotated by the rotation of the fan. are charged with static electricity by friction. As a result, the collecting portion provided in contact with or in close proximity to the opposing friction portion, or the collecting portion configured by the opposing friction portion and integrated with the opposing friction portion, collects by the electrostatic force charged in the friction facing portion. Charged dust in the air flowing through the part is collected. In particular, according to the electrostatic force charged in the opposing frictional portion, even fine particles that are easily charged in the indoor space can be captured with low pressure loss.

Therefore, according to the air purifier of the invention of claim 2, the movement of the fan and the movement of friction are made common, and the electrostatic force charged by the friction collects the charged dust in the air. As a result, fine particles can be efficiently collected, and the size, weight, and cost can be reduced.
In particular, when a filtering-type filter is used in the collecting part, it can be provided in contact with or in close proximity to the collecting part, or can be provided integrally with the collecting part, even if the filter is not finely meshed. Due to the electrostatic force of the opposing friction part, it is possible to make the filter adsorb charged particles that are finer than the mesh of the filter. Since fine particles can be captured, high dust collection efficiency can be obtained with low pressure loss, achieving both miniaturization and high dust collection efficiency.
Further, according to the air purifier of the invention of claim 2, since the fan and the like are housed in the casing, it is easy to carry and has a good appearance.

According to the air purifier according to the invention of claim 3, the collecting part is composed of a filter and can filter dust in the circulating air, so the effects of claims 1 and 2. In addition, it is possible to achieve both miniaturization and high dust collection efficiency.

According to the air purifier according to the fourth aspect of the invention, the fan friction portion is a part of the fan, and has a larger friction area than the opposing friction portion. A space will suffice. Therefore, in addition to the effect described in any one of claims 1 to 3, manufacturing is easy and cost can be reduced.

According to the air purifier according to the invention of claim 5, the opposing friction portion has a larger friction area than the fan friction portion, and the opposing friction portion or the collecting portion is closer to the collecting portion than the fan. is rubbed over a wider area than the fan friction portion. It is possible to increase the efficiency of collecting dust.

According to the air purifier unit according to the invention of claim 6, there is provided a fan that generates an air flow by rotational driving, and a fan that is disposed on the intake side of the fan to allow the air to flow and remove dust in the air. and a fan friction portion integral with the fan that is electrically charged by being rubbed by the rotational drive of the fan, and the collecting portion, or is in contact with or close to the collecting portion. a first air purifier having a facing friction portion facing the fan, which is provided in contact with the fan friction portion and is charged with static electricity by friction with the fan friction portion when the fan is rotationally driven; a fan that generates an air flow when driven; a collecting unit that is disposed on the intake side of the fan and collects dust in the air while allowing the air to flow; and friction caused by rotational driving of the fan. and a fan friction portion integral with the fan that is charged with static electricity and the collecting portion, or provided in contact with or in the vicinity of the collecting portion, contacting the fan friction portion to drive the rotation of the fan. a second air purifier having a facing friction portion facing the fan, which rubs against the fan friction portion and is charged with static electricity having a polarity opposite to that of the facing friction portion of the first air purifier. equip. Therefore, in each of the first air purifier and the second air purifier, the rotational driving of the fan causes an air flow, and the air flows through the collection section. At this time, since the fan friction portion provided integrally with the fan and the opposed friction portion arranged opposite to the fan are in contact with each other, the fan friction portion and the opposed friction portion are also rotated by the rotation of the fan. are charged with static electricity by friction. As a result, the collecting portion provided in contact with or in close proximity to the opposing friction portion, or the collecting portion configured by the opposing friction portion and integrated with the opposing friction portion, collects by the electrostatic force charged in the friction facing portion. Charged dust in the air flowing through the part is collected. Further, according to the electrostatic force charged in the opposing friction portion, even fine particles that are easily charged in the indoor space can be captured with low pressure loss.

In particular, according to the air purifier of the invention of claim 6, since the opposing friction portion of the first air purifier and the opposing friction portion of the second air purifier have a pair of electrification polarities, Since both negatively charged dust and positively charged dust can be collected by the collecting portion of the first air cleaner or the collecting portion of the second air cleaner, the collection efficiency is high regardless of ambient environmental conditions. is obtained.

Thus, according to the air cleaning unit of the invention of claim 6, the movement of the fan and the movement of friction are made common, and the electrostatic force charged by the friction collects the charged dust in the air. As a result, fine particles can be efficiently collected, and the size, weight, and cost can be reduced.
In particular, when a filtering-type filter is used in the collecting part, it can be provided in contact with or in close proximity to the collecting part, or can be provided integrally with the collecting part, even if the filter is not finely meshed. Due to the electrostatic force of the opposing friction part, it is possible to make the filter adsorb charged particles that are finer than the mesh of the filter. Since fine particles can be captured, high dust collection efficiency can be obtained with low pressure loss, achieving both miniaturization and high dust collection efficiency.

FIG. 1 is an explanatory diagram illustrating the overall configuration of an air purifier according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the appearance of the air purifier and the flow of air according to the embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating the internal configuration of the air purifier according to the embodiment of the present invention. FIG. 4 is an explanatory diagram illustrating the fan friction portion and the opposing friction portion of the air purifier according to the embodiment of the present invention. FIG. 5 is a partially enlarged view for explaining the facing friction portion of the air purifier according to the embodiment of the invention. FIG. 6 is an explanatory diagram for explaining the structure of a casing containing the fan of the air purifier according to the embodiment of the invention. FIG. 7 is an exploded explanatory view illustrating the structure of the fan of the air purifier according to the embodiment of the present invention and the casing that accommodates the fan. FIG. 8 is a partial cross-sectional view of the air purifier according to the embodiment of the present invention taken along line AA shown in FIG. FIG. 9 is an explanatory diagram illustrating another example of the protrusion of the air purifier according to the embodiment of the present invention. 10A and 10B are explanatory diagrams for explaining projections and opposed friction portions as fan friction portions of an air purifier according to Modification 1 of the embodiment of the present invention. FIG. 11A and 11B are explanatory diagrams for explaining projections and opposed friction portions as fan friction portions of an air purifier according to Modification 2 of the embodiment of the present invention. FIG. FIG. 12 is an explanatory diagram illustrating a usage pattern of the air purifier according to the embodiment and modification of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, in each embodiment and modification, the same symbol and the same reference sign mean the same or corresponding functional part, and the same reference symbol and the same reference sign in each embodiment and modification Since this is a functional part common to the form and modification of , redundant detailed description is omitted here.

[Embodiment]
First, an air cleaner 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG.
The air purifier 1 of the present embodiment includes a fan 20 that generates an air flow by rotational driving, a filter 41 that is disposed on the intake side in front of the fan 20 and allows air circulation, that is, ventilation, and a fan 20 and the filter 41, the friction body 31 provided with the protrusion 35 as the opposed friction portion that contacts the central fan friction portion 25 of the fan 20, the motor 46 that rotates the fan 20, and the motor 46. The battery 41 as a power supply unit for supplying electric power is housed in a casing 10 composed of a container body 11 and a lid body 12, and is small and portable.

The casing 10 of the present embodiment has a substantially rectangular box-like shape for housing the fan 20, the motor 46, the battery 41, etc., and is composed of a container body 11 with an upper opening and a lid 12 that closes the opening of the container body 11. It is
As shown in FIGS. 1, 6 and 7, the substantially rectangular parallelepiped container main body 11 is composed of a bottom surface portion 11a and four side wall portions 11b standing upright from the bottom surface portion 11a. In the interior defined by the side wall portion 11b, a fan accommodating space 14 for accommodating the fan 20 and rectifying the airflow generated by the rotation of the fan 20 is defined by the rectifying partition portion 13 erected on the bottom surface portion 11a. It is

Further, in the container body 11 of the present embodiment, the fan housing space for housing the fan 20 is defined by the side wall portion 11b on one of the four sides of the side wall portion 11b erected on the bottom portion 11a and the rectifying partition portion 13. 14, and one side wall portion 11b that defines the fan housing space 14 has an exhaust port 15B that is made up of a plurality of holes and allows ventilation.
In the container body 11, the bottom surface portion 11a on the side of the fan housing space 14 is formed in a substantially concave shape as shown in FIG. , and a motor 46 is arranged on the back side of the fan 20 . In the container main body 11 shown in FIG. 7, a plurality of restricting portions 16a for restricting the movement of the motor 46 are radially formed in the motor accommodating space 16 that accommodates the motor 46. A motor 46 is fitted in the central portion surrounded by .

In the container body 11 shown in FIGS. 6 and 7, etc., a battery 41 that supplies power to a motor 46 that drives the fan 20 is accommodated by a battery partition portion 18 erected on the bottom portion 11a. A battery housing space 17 is defined, and the battery 41 is housed in the battery housing space 17 defined by the battery partition portion 18 and the side wall portion 11b.
The container body 11 is provided with a switch portion 43 for turning ON/OFF the electric circuit of the lead wire 42 for supplying power from the battery 41 to the motor 46 . are connected to the motor 46 via the switch section 43 .

Further, as shown in FIGS. 1 and 2, the lid 12 that constitutes the casing 10 of the present embodiment and closes the opening of the container body 11 is formed to have a substantially U-shaped cross section, and has a net-like opening at its center. It has an air intake port 15A that allows for airflow.

The container body 11 and the lid 12, which constitute the casing 10 of the present embodiment, are configured to fit together, and the lid 12 is detachably fixed so as to block the opening of the container body 11. .
The container body 11 and the lid 12 of the casing 10 can be made of any material such as plastic, ceramics, metal, glass, etc. From the viewpoint of portability, lightness, and handleability, furthermore, static electricity can be effectively eliminated. From the viewpoint of static charging, plastic is preferable.

The fan 20 of the present embodiment housed in the container body 11 of the casing 10 is a centrifugal turbo fan, as shown in FIGS. It is formed from a plurality of blades 22 integrally formed on the upper surface. The fan 20 of this embodiment is made of, for example, a plastic material that is lightweight and easy to handle. It is a material that is charged with static electricity by rubbing with the protrusions 35 provided on the friction body 31 arranged in front of the blade 22 formation side.

The circular substrate 21 of the fan 20 of the present embodiment has, for example, a circular outer shape with a diameter of about 4 cm to 10 cm, and is formed to have a generally convex mountain-shaped cross section protruding toward the central portion thereof. , and has a cylindrical portion 26 formed with a mounting hole 26a to which a drive shaft (rotating shaft) 46a of a motor 46 is mounted.

Further, the blades 22 of the fan 20 of the present embodiment are arranged on the disk substrate 21 in a plurality of radially circumferential directions around the cylindrical portion 26 having the mounting hole 26a for the drive shaft 46a at predetermined equal intervals. , for example, about 6 to 15 sheets are formed. As shown in FIG. 7 and the like, each blade 22 has, for example, a generally trapezoidal or rectangular curved flat plate shape as a whole, and the edges of the inclined surfaces of the inner and/or outer ends are notched. is attached and formed in a serrated shape. In the present embodiment, each blade 22 is a so-called backward blade, as shown in FIGS. The blades 22 are widened from the center side toward the outer periphery. According to the shape of the blade 22 facing backward and the shape of the blade 22 formed in a serrated shape with serrations at the edges of the inner and/or outer inclined surfaces, the resistance to the air flow is reduced and the noise is reduced. and high air flow efficiency.

In the fan 20 of this embodiment having such a configuration, the drive shaft (rotating shaft) 46a of the motor 46 is mounted in the mounting hole 26a of the cylindrical portion 26 at the central portion thereof. is rotated around the cylindrical portion 26 to which the is attached. As the fan 20 is driven to rotate, an air flow is generated in the radial direction perpendicular to the drive shaft 46a. That is, an air flow is generated between the two blades 22 adjacent to each other from the cylindrical portion 26 side toward the outer peripheral side.

In the fan 20 of the present embodiment, in the central portion of the circular substrate 21, the portion corresponding to the hub portion around the cylindrical portion 26 to which the drive shaft 46a of the motor 46 is attached faces the front of the fan 20. An annular fan friction portion 25 is formed with which a protrusion 35 provided on the friction body 31 is brought into contact and rubbed. In addition, in the circular substrate 21 of the fan 20 of the present embodiment, the circular substrate 21 is formed in a substantially convex cross-sectional mountain shape projecting toward the cylindrical portion 26 side with the cylindrical portion 26 on the center side as the apex. The fan friction portion 25, which is circumferentially continuous in a portion corresponding to the hub portion between the blades 22 and the cylindrical portion 26 radially arranged around the portion 26, has an inclined surface.

Furthermore, as shown in FIGS. 1, 5, 8, etc., in front of the fan 20 housed in the container body 11 of the casing 10, a fan friction portion 25 at the center of the circular substrate 21 of the fan 20 is provided. A friction body 31 is provided with projections 35 for contacting the surface. The friction body 31 of the present embodiment has a size to cover the opening of the container body 11 of the casing 10 , that is, is formed in a plate shape having an area substantially equal to the opening surface of the container body 11 , so as to cover the opening of the container body 11 . are accommodated in the casing 10 at first.
The friction member 31 is made of, for example, a plastic material that is lightweight and easy to handle.

The friction body 31 of the present embodiment is provided with a projecting portion 35 that protrudes and extends toward the fan 20 from the side facing the fan with respect to the plate-shaped substrate 32 . An opening 33 is formed at a location facing the fan 20 housed in the container body 11 to allow air circulation, that is, ventilation.

In the friction body 31 of the present embodiment, reinforcing ribs 34 are radially formed so as to partition the opening 33 in the plate-like substrate 32 . A protruding portion 35 is formed to contact the annular fan friction portion 25 around the cylindrical portion 26 provided in the central portion of the circular substrate 21 of the fan 20 on the side. In the friction body 31 shown in FIGS. 1 to 5 and the like, the central portion of the reinforcing ribs 34 radially arranged and facing the cylindrical portion 26 of the fan 20 has a substantially hexagonal or circular shape. plate-shaped central portion 36. Furthermore, on the plate-shaped base plate 32 of the friction body 31, ribs for reinforcement, ribs for preventing rattling of the friction body 31 and positioning it, and a filter 41 made of non-woven fabric, which will be described later, are appropriately engaged. A protrusion or the like may be formed for this purpose.

The protruding portion 35 of the present embodiment corresponds to the inclined surface of the fan friction portion 25 of the fan 20, and the tip portion of the protruding portion 35 has a protruding length from the reinforcing rib 34 outside the plate-shaped central portion 36 rather than inside. It is elongated and slanted, and has a shape that increases contact resistance by ensuring more than line contact with the surface of the fan friction portion 25 of the fan 20, that is, line contact or surface contact close to line contact.
Further, the protrusions 35 of the present embodiment are formed so as to protrude from the reinforcing ribs 34 of the plate-like substrate 32 toward the fan 20 side, but in the direction perpendicular to the plane of the plate-like substrate 32 . On the other hand, the reinforcing ribs 34 are provided with an inclination, and in particular, by inclining in the direction opposite to the rotation direction of the fan 20, the resistance to the airflow is reduced and the load is reduced.

The friction body 31 having such projections 35 is disposed facing the fan 20 so that the projections 35 come into contact with the surface of the fan friction portion 25 around the cylindrical portion 26 of the disk substrate 21 of the fan 20. As the fan 20 rotates, the projection 35 in contact with the fan 20 rubs the surface of the fan friction portion 25 of the fan 20, and the fan friction portion 25, the fan 20 having the fan friction portion 25, the projection 35, and the projection A friction body 31 having a portion 35 is charged with static electricity.

Here, the fan 20 having the fan friction portion 25 and the friction body 31 having the protrusion 35 are preferably made of different materials, and are preferably combined with materials having a positional relationship far apart on the electrification line.
For example, the friction body 31 may be made of a material that is more likely to be negatively (-) charged than the material of the fan 20, specifically polytetrafluoroethylene (PTFE), acrylic, polyester, polyurethane, or polyethylene, which tends to be negatively charged. While the fan 20 is made of terephthalate, polypropylene, polyethylene, polyvinyl chloride, polyacrylonitrile, rubber, silicone, or the like, the fan 20 is made of a material that is more likely to be positively charged than the material of the friction body 31, specifically, positively. By forming it from nylon, polyamide, etc., which have a strong tendency to be charged, the fan friction part 25 and the fan 20 having the fan friction part 25 become positive due to the friction of the protrusion 35 of the friction body 31 against the fan friction part 25 of the fan 20. As a result, the protrusion 35 and the friction body 31 having the protrusion 35 are negatively charged.

Alternatively, it may be vice versa. That is, the friction member 31 is made of a material that is easily charged positively (+), such as nylon or polyamide, while the fan 20 is made of a material that is easily charged negatively (-), such as polytetrafluoroethylene (PTFE). By forming with acrylic, polyester, polyurethane, polyethylene terephthalate, polypropylene, polyethylene, polyvinyl chloride, polyacrylonitrile, rubber, silicone, or the like, the fan friction portion 25 and the fan 20 having the fan friction portion 25 are negatively charged and the protrusions are formed. The friction body 31 having the portion 35 and the protrusion 35 is positively charged.
Such positive (+) easily charged nylon, etc., and negative (-) easily charged polytetrafluoroethylene (PTFE), acrylic, polyester, polypropylene (PP), polyethylene (PE), polyvinyl chloride (PVC), etc. According to the combination of (1) and (2), since the positional relationship of the electrification rows is distant, the amount of charge, that is, the amount of static electricity generated, can be increased, and a strong electrostatic force can be obtained.

Further, in the present embodiment, as shown in FIGS. 1 and 3, the surface of the friction body 31 having the projection 35 that is brought into contact with the fan friction portion 25 of the fan 20 is opposite to the projection 35. A filter 41 is arranged on the side. The filter 41 is formed, for example, to have an area substantially equal to that of the base plate 32 of the friction body 31 , is arranged on the side of the friction body 31 opposite to the face facing the fan 20 , and is housed in the casing 10 . The filter 41 may or may not be fixed to the friction plate 31 or the lid 12, but is accommodated in the casing 10 in a replaceable manner. In particular, when the filter 41 is adjacent to the friction body 31, the collection efficiency in the filter 41 can be enhanced by the electrostatic force of the projection 35 and the friction body 31 having the projection 35. FIG.

The filter 41 may be of any type as long as it allows ventilation and can filter dust in the air taken in from the air inlet 15A of the lid 12 by the rotation of the fan 20. In this embodiment, the spunbond Non-woven fabrics such as non-woven fabrics, meltblown non-woven fabrics, wet-laid non-woven fabrics and spunlaced non-woven fabrics are used. The material of the nonwoven fabric is not particularly limited. Natural fibers such as pulp, hemp, and silk, and glass fibers can be used. It is not limited to one sheet of nonwoven fabric, and it is also possible to use two or three layers of nonwoven fabric stacked on top of each other. With such a nonwoven fabric, it is possible to obtain high filtration efficiency at a low cost, and even if it is disposable, the cost is low, maintenance is easy, and hygiene can be maintained.

Thus, the air purifier 1 of the present embodiment includes the fan 20 and the rotating shaft 46a for rotating the fan 20 in the container body 11 in the casing 10 composed of the container body 11 and the lid body 12 fitted thereto. and a battery 41 serving as a power source for the motor 46, and a friction body 31 having a protrusion 35 is disposed so as to cover the opening side of the container body 11. Further, the protrusion of the friction body 31 A filter 41 made of non-woven fabric is arranged on the side opposite to 35 .

According to the air purifier 1 of the present embodiment configured as described above, when the switch portion 43 attached to the container body 11 of the casing 10 is turned on, electric power is supplied from the battery 41 to the motor 46 via the lead wire 42 . By driving the motor 46, the fan 20 is rotationally driven around its rotary shaft 46a.

Here, the lid 12 that closes the opening side of the container body 11 of the casing 10 is formed with an intake port 15A that allows air to flow, and the filter 41 that is disposed inside the casing 10 also allows air to flow. A plate-shaped friction member 31 made of nonwoven fabric and disposed between the fan 20 and the filter 41 housed in the container body 11 also has an opening 33 that allows ventilation at a location facing the fan 20 . Furthermore, in the container main body 11 of the casing 10, an exhaust port 15B is formed in the side surface portion 11b around the housed fan 20 to allow ventilation.

Therefore, ventilation is allowed at the opening 33 of the friction body 31 disposed in front of the intake side of the fan 20, the filter 41 made of non-woven fabric, and the intake port 15A of the lid 12. Since air is allowed to pass through the exhaust port 15B of the side portion 11b around the casing 10, when the fan 20 housed in the container body 11 of the casing 10 is rotationally driven, the fan 20 is rotationally driven to cause the lid 12 to open. External air is sucked from the intake port 15A, passes through the filter 41 made of non-woven fabric and the opening 33 of the plate-like friction body 31, and flows into the fan housing portion 14 housing the fan 20 in the container body 11, and further, An airflow is formed which is exhausted from the exhaust port 15B of the side wall portion 11b of the container body 11 defining the fan accommodating portion 14 .

At this time, since the filter 41 made of non-woven fabric is provided in front of the fan 20 accommodated in the container body 11, that is, on the suction side, the air is taken in from the suction port 15A of the lid 12 by the rotation of the fan 20. When outside air passes through the filter 41 made of non-woven fabric, dust in the air is filtered and collected by the filter 41, passes through the opening 33 of the friction body 31 and the fan housing space 14, and reaches the container body 11. The air is exhausted from the exhaust port 15A of the side wall portion 11b. Therefore, according to the air purifier 1 of the present embodiment, air can be purified and deodorized (deodorized, deodorized).

In particular, in the air purifier 1 of the present embodiment, between the fan 20 and the filter 41 housed in the container body 11 of the casing 10, a plate-shaped friction member formed to cover the opening of the container body 11 is formed. A body 31 is provided, and a projection 35 is formed on the surface of the friction body 31 facing the fan 20 . blade 22 is brought into contact with the fan friction portion 25 where no blade 22 is provided.

Therefore, when the fan 20 rotates, the movement causes friction between the protruding portion 35 of the friction body 31 arranged between the fan 20 and the filter 41 and the surface of the fan friction portion 25 around the cylindrical portion 26 of the fan 20. Then, the fan friction portion 25, the fan 20 having the fan friction portion 25, and the projection portion 35 and the friction body 31 having the projection portion 35 are charged with static electricity.
Therefore, the entire (entire surface) of the fan friction portion 25 and the fan 20 having the fan friction portion 25, and the entire (entire surface) of the projection portion 35 and the friction body 31 having the projection portion 35 are charged with negative or positive electrostatic force. , the filter 41, the friction body 31, and the fan 20, which are in contact with or close to the friction body 31, can adsorb and capture the charged dust in the air. In particular, according to the electrostatic force charged by the friction between the fan friction portion 25 of the fan 20 and the projection portion 35 of the friction body 31, even if the dust particles are finer than the mesh of the filter 41, the friction body 31 It is also possible to make it adsorb to the filter 41 that is in contact with or arranged close to the . In addition, since an electrostatic field is formed between the friction body 31 and the fan 20, even fine charged particles that have passed through the filter 41 and whether they are positively or negatively charged will or the fan 20 can adsorb and collect the particles.

Thus, according to the air purifier 1 of the present embodiment, the surface of the fan friction portion 25 of the fan 20 and the friction body 31 are rotated by the rotational driving of the fan 20 that generates the air flow, even if the mesh of the filter 41 is not fine. By friction with the projection 35, the friction causes the fan friction portion 25, the fan 20 having the fan friction portion 25, and the projection 35 and the friction body 31 having the projection 35 to be charged. Since it is possible to collect even fine particles, it is possible to increase the collection efficiency of fine particles with energy saving and low pressure loss. Therefore, a high collection efficiency can be obtained with a small amount of energy, so miniaturization is possible.

Here, if a material that is difficult to be charged or a material that is close to the material of the friction body 31 on the electrification series is used as the fibers forming the filter 41, the friction body 31 having the protrusions 35 will have the same polarity as the charge charged on the friction body 31. Particles in the air that are positively charged tend to be collected by the filter 41 provided in contact with or close to the friction body 31 . For example, if the fan 20 is made of a material that is more easily negatively (-) electrified than the material of the friction body 31, and the friction body 31 is made of a material that is more likely to be positively (+) electrified, Negatively charged particles are easily attracted and collected by the filter 41 and the friction body 31, and positively charged particles in the air passing through the filter 41 are sometimes attracted and collected by the fan 20.例文帳に追加Alternatively, if the fan 20 is made of a material that is more easily charged positively (+) than the material of the friction body 31, and the friction body 31 is made of a material that is more likely to be charged negatively (-), the Positively charged particles are easily attracted and collected by the filter 41 and the friction body 31, and negatively charged particles in the air passing through the filter 41 are sometimes attracted and collected by the fan 20.例文帳に追加

On the other hand, the fibers forming the filter 41 are made of a material that is easily electrified to the opposite polarity of the material of the friction body 31, so that contact electrification is generated between the filter 41 and the friction body 31, and contact electrification is generated between the filter 41 and the friction body 31. It is also possible to increase the charge amount of the friction body 31, that is, the electrostatic force. In this case, since the filter 41 is likely to be charged with the charge opposite to the charge charged on the friction body 31, particles in the air charged to the same polarity as the charge charged on the friction body 31 are filtered. It becomes easier to be captured by 41.

In particular, according to the air purifier 1 of the present embodiment, the protrusions 35 of the friction bodies 31 are brought into contact with and rub against the rotationally driven fan 20, and the rotational driving of the fan 20 generates an air flow. As a result, the inside of the casing 10, particularly the space of the fan accommodating portion 14, tends to be in a dry state with low humidity, and the surface resistance of the fan friction portion 25 of the fan 20 and the surface resistance of the projection portion 35 of the friction body 31 can be increased. , it is possible to efficiently generate friction and enable electrostatic charging, and to obtain a high amount of electrostatic charging, ie, electrostatic force, even in a space-saving manner.

When the rotation of the fan 20 is stopped by turning off the switch section 43, or when particles such as dust accumulate on the friction body 31 and the fan 20, the electrostatic force of the friction body 31 and the fan 20 decreases. , disappears and the fine particles adhering to the friction body 31 and the fan 20 may drop. Therefore, when carrying out the present invention, for example, a non-woven fabric, an adhesive member, or the like for collecting fine particles adhering to the friction member 31 or the fan 20 should be replaced on the rectifying partition 13 side of the container body 11 of the casing 10. It is preferable to place them freely. As a result, it is possible to prevent a decrease in the suction force of the fan 20 and maintain a high collection efficiency for a long period of time.

Further, in the air purifier 1 of the present embodiment, the filter 41 is housed in the casing 10 in a replaceable manner. Therefore, when the filtering ability is degraded, the filtering ability can be restored by replacing the filter 41. Maintenance is also low cost.
Further, the friction body 31 is also housed in the casing 10 so as to be replaceable and can be removed from the casing 10 . In addition, the fan 20 can also be attached to and removed from the rotary drive shaft 46 a of the motor 46 . Therefore, even if the protrusions 35 of the fan 20 and the friction bodies 31 are worn by friction and the friction efficiency and the electrostatic force are reduced, the dust collecting effect can be restored by replacing the fan 20 and the friction bodies 31. , can be used for a long time at low cost. However, when carrying out the present invention, it may be assembled integrally and not premised on replacement.

As described above, the air purifier 1 of the above-described embodiment includes the fan 20 which is rotationally driven to generate an air flow, and the fan 20 disposed in the air path through which the air flows to allow the air to flow and collect dust in the air. A filter 41 as a collecting portion, a fan friction portion 25 integrated with the fan 20 which is rubbed by the rotation of the fan 20 and charged with static electricity, and a fan friction portion 25 of the fan 20 which is provided in contact with or close to the filter 41. The opening 33 is disposed facing the fan 20 and allows air to flow as a facing friction portion facing the fan 20, which is charged with static electricity by friction with the fan friction portion 25 due to the rotation of the fan 20. and a projection 35 integral with the friction body 31.

Further, the above-described embodiment is composed of the container body 11 having a predetermined volume space and the lid member 12 covering the opening of the container body 11, and the air intake port 15A and the air exhaust port 15A are formed on the peripheral surface defining the predetermined volume space. A casing 11 having an opening 15B, a fan 20 that is housed in the casing 11 and that rotates to generate a flow of air that is taken in from the intake opening 15A and exhausted from the exhaust opening 15B, and is arranged on the intake side of the fan 20 in the casing 11. A filter 41 as a collecting part that allows air to flow and collects dust in the air, and fan friction integrated with the fan 20 that is frictionally charged by the rotation of the fan 20 housed in the casing 11 and is charged with static electricity. and a portion 25, which is provided in contact with or adjacent to the filter 41 within the casing 11, contacts the fan friction portion 25 of the fan 20, and is electrified by friction with the fan friction portion 25 of the fan 20 when the fan 20 is rotationally driven. The invention of the air purifier 1 includes, as a facing friction portion facing the fan 20, a friction body 31 having an opening 33 that is disposed facing the fan 20 and that allows air to flow, and a protrusion 35 integral with the friction body 31. can also

According to the air purifier 1 according to the above-described embodiment, an air flow is generated by rotationally driving the fan 20, and the air flows through the filter 41 as the collecting portion. Specifically, the fan 20 is rotationally driven to generate an air flow, and external air is drawn from the intake port 15A of the lid 12 of the casing 10. It passes through the filter 41 as a part, passes through the opening 33 of the friction body 31 provided in contact with or close to the filter 41, and is exhausted from the exhaust port 15B of the container body 11 of the casing 10. At this time, the fan friction portion 25 of the fan 20 rubs against the protrusion 35 of the friction body 31 as the opposed friction portion contacting the fan friction portion 25 of the fan 20 due to the rotation of the fan 20, and is charged with static electricity. Therefore, due to the friction between the protrusion 35 of the friction body 31 provided in contact with or close to the filter 41 and the fan friction part 25 of the fan 20, the protrusion 35 and the entire friction body 31 having the protrusion 35 are charged with electrostatic force. Thus, it is possible to cause the filter 41 to adsorb charged dust in the air flowing through the filter 41 that is in contact with or close to the friction body 31 . Also, even minute charged particles that have passed through the mesh of the filter 41 can be attracted to the friction body 31 and the fan 20 by the electrostatic force charged by the friction body 31 and the fan 20 . In particular, according to such electrostatic force, fine particles such as pollen floating in the air, solid or liquid particles such as cigarette smoke, particles such as odorous gases, etc. Also, microorganisms floating in the air can be captured with low pressure loss.

Thus, according to the air purifier 1 according to the above-described embodiment, the movement of the fan 20 for generating the air flow and the movement for electrification by friction are made common to reduce power consumption, and dust is removed by electrification by friction. Since it collects and does not require high voltage for corona discharge, it can be made safe, easy to handle, small, lightweight and inexpensive.

In particular, according to the air purifier 1 according to the above-described embodiment, since the filter 41 of the filtering type is used as the collection part, even if the mesh of the filter 41 is not fine, the finer charges than the mesh of the filter 41 can be obtained. The particles can be attracted to the filter 41 by the electrostatic force of the friction body 31 charged by the friction between the protrusion 35 of the friction body 31 and the fan friction part 25 of the fan 20 . Also, even fine charged particles that have passed through the mesh of the filter 41 can be attracted to the friction body 31 and the filter 20 by the electrostatic force charged by the friction body 31 and the filter 20 . Therefore, in addition to filtration of dust by the mesh of the filter 41, the electrostatic force generated by the friction between the protrusion 35 of the friction body 31 and the fan friction portion 25 of the fan 20 in contact with or in close proximity to the filter 41 causes fine charging. Since the dust can be captured by the filter 41, the friction body 31, and the fan 20, high dust collection efficiency can be obtained without increasing ventilation resistance, that is, with low pressure loss, and both miniaturization and high dust collection efficiency can be achieved.
According to the air purifier 1 according to the above embodiment, the fan 20 having the fan friction portion 25, the filter 41, and the friction body 31 having the protrusion 35 are all housed in the casing 10. It is easy to carry around and looks good.

Further, according to the air cleaner 1 according to the above-described embodiment, the fan friction portion 25 is a part of the fan 20 corresponding to the periphery of the cylindrical portion 26 of the fan 20, and is a part of the fan 20 and the filter 41. In the friction body 31 provided in contact with or close to the filter 41 between them, a protrusion 35 is formed that contacts the fan friction portion 25 of the fan 20 and rubs against the fan friction portion 25 . The projection 35 of the friction body 31 is rubbed against the annular fan friction portion 25 having a wider contact area than the contact area. Therefore, since the number of parts and the space can be reduced, the device can be manufactured at a low cost, and the device can be made more compact, lightweight, and inexpensive. Furthermore, in the case where the protrusion 35 rubs against the fan friction portion 25, the fan friction portion 25 wears less and the fan 20 itself does not need to be replaced frequently, so maintenance costs are low.

By the way, in FIGS. 1 to 8, two projections 35 are provided on the reinforcing rib 34 on the same axial line, but the number of projections 35 is not limited to two when carrying out the present invention. , may be one, three or more, or may correspond to the number of the reinforcing ribs 34 . Further, the tip portion to be brought into contact with the fan friction portion 25 is not limited to a flat shape, and may be, for example, a serrated shape.
Furthermore, when the present invention is carried out, for example, as shown in FIG. 9, a protrusion 35 may be configured to contact the fan friction portion 25 of the fan 20 over the entire annular circumference. For example, as shown in FIG. 9, the friction member 31 is provided in the central portion surrounded by the radially arranged reinforcing ribs 34, and has a tubular shape with a downwardly expanding diameter and a serrated tip end. It may be the portion 35, or may be a tubular protrusion 35 having a constant diameter. Also, the tip may be flat rather than serrated.

In the above description, the fan friction portion 25 is a part of the circular substrate 21 of the fan 20. However, in carrying out the present invention, the fan friction portion 25 is formed separately from the circular substrate 21. , may be exchangeably attached to the circular substrate 21 . For example, the fan friction portion 25 formed in an annular shape or the like is replaceably attached around the central cylindrical portion 26 of the circular substrate 21 by an adhesive or fitting structure, or is attached to the cylindrical portion 26 in a replaceable manner. Therefore, when the fan friction portion 25 wears out, only the fan friction portion 25 is replaced. As the fan friction 25 at this time, for example, a plate-like member made of resin or rubber formed in an annular shape, a film (sheet)-like member made of resin, a sponge-like member made of resin or rubber, A non-woven fabric or the like made of synthetic or natural fibers or the like can be used. This enables maintenance at a lower cost.

[Modification 1]
Next, an air purifier 1 according to Modification 1 of the above embodiment will be described with reference to FIG.
In the above-described embodiment, the friction body 31 having the protrusion 35 is arranged to face the fan 20 , and the protrusion 35 is formed in an annular shape corresponding to the central portion of the circular substrate 21 constituting the fan 20 , which is the hub portion. By contacting the fan friction part 25, the surface of the fan friction part 25 around the cylindrical part 26 at the center of the fan 20 and the projection part 35 of the friction body 31 rub against each other when the fan 20 is rotationally driven, and the fan friction is generated. The fan 20 forming the portion 25 and the friction member 31 forming the protrusion 35 are charged with static electricity.

On the other hand, in the air purifier 1 according to Modification 1, a friction rotating body 351 having a projection 350 is integrally provided with the fan 20 as a fan friction portion, and the projection 350 is connected to the filter 41 in front of the fan 20. When the fan 20 is driven to rotate, the protrusion 350 of the fan 20 is brought into contact with the opposing friction portion 250 of the friction body 31 by contacting the opposing friction portion 250 formed on the friction body 31 provided in contact with or adjacent to the filter 41 between the filter 41 and the filter 41 . The fan 20 provided with the protrusion 350 and the opposing friction portion 250 are constituted by the friction between the protrusion 350 integrally provided on the fan 20 and the opposing friction portion 250 formed on the friction body 31 by rotating and sliding on the surface. The friction body 31 is charged with static electricity. Since the rest of the configuration is the same as that of the above-described embodiment, redundant description will be omitted here.

The fan 20 according to Modification 1 has a cylindrical portion 26 provided in the central portion of the disk substrate 21 and having a mounting hole 26a into which the rotating shaft 46a of the motor 46 is inserted. is attached.
The friction rotor 351 is preferably made of the same material as the fan 20, and has a hollow shape to which the shaft portion 352 or the cylindrical portion 26 is attached. and a projecting portion 350 formed integrally with the shaft portion 352 and extending in the radial direction thereof. The projecting portion 350 has, for example, a truncated quadrangular pyramid shape, and has a substantially flat upper end that contacts the opposing friction portion 250 of the friction body 31 . In FIG. 10, four protrusions 350 are provided at equal intervals with the axis 352 as the axis of symmetry, but the number of protrusions 350 is not particularly limited when the present invention is carried out. From the point of view of rotational balance, two or more are preferable.

The friction rotator 351 and the cylindrical portion 26 of the fan 20 may have any structure as long as the friction rotator 351 does not easily come off from the cylindrical portion 26 when the fan 20 rotates. By forming the shaft portion 352 or providing an engagement structure on the cylindrical portion 26 of the fan 20 , it becomes difficult for the friction rotating body 351 to come off from the cylindrical portion 26 when the fan 20 rotates. Preferably, the friction rotor 351 is detachably attached to and detached from the cylindrical portion 26, that is, is attached so as to be replaceable. As a result, when the protrusion 350 of the friction rotor 351 wears out, only the friction rotor 351 is replaced, thereby reducing maintenance costs. However, when carrying out the present invention, the friction rotating body 351 and the cylindrical portion 26 of the fan 20 may be firmly fixed, or the friction rotating body 351 and the cylindrical portion 26 may be integrally formed, and the protrusion The entire fan 20 may be replaced when the portion 350 wears out.

Also in the air purifier 1 according to Modification 1, a plate-like friction body 31 is disposed facing the fan 20 in a size that covers the opening of the container body 11 of the casing 10 that houses the fan 20. It is housed in a casing 10 consisting of a container body 11 and a lid 12 .

Here, the friction body 31 according to Modification 1 has an opening 33 that allows ventilation on the side facing the fan 20 in a plate-like substrate 32 . A radial reinforcing rib 34a and a substantially disk-shaped opposed friction portion 250 with which the projection 350 of the friction rotor 351 provided on the fan 20 contacts are formed. In addition, in the friction body 31 according to Modification 1 shown in FIG. The opposing friction portion 250 may be formed in an annular shape. That is, an opening that allows ventilation may be provided at a location corresponding to the central portion of the fan 20, and the opposed friction portion 250 may be annularly formed so as to surround the opening.

In the air purifier 1 according to Modification 1 configured as described above, when the fan 20 housed in the container body 11 of the casing 10 is rotationally driven, the rotational driving of the fan 20 causes the intake port of the lid 12 to open. Outside air is sucked from 15A, passes through the filter 41 made of non-woven fabric and the opening 33 of the plate-like friction body 31, enters the fan housing portion 14 housing the fan 20 in the container body 11, and enters the container body 11. An air flow is formed which is exhausted from the exhaust port 15B of the side wall portion 11b.

At this time, also in the air purifier 1 according to Modification 1, the filter 41 made of non-woven fabric is provided in front of the fan 20 housed in the container body 11, that is, on the intake side, with the friction body 31 interposed therebetween. When the outside air taken in from the intake port 15A of the cover 12 by the rotation of the fan 20 passes through the filter 41 made of nonwoven fabric, dust in the air is filtered and collected by the filter 41, and the friction body 31 and the fan housing space 14, and is exhausted from the exhaust port 15B of the side wall portion 11a of the container body 11. As shown in FIG. Therefore, air can be purified and deodorized (deodorized, deodorized).

In particular, in the air cleaner 1 according to Modification 1, a friction rotor 351 having a projection 350 is attached to the central cylindrical portion 26 of the fan 20 to which the drive shaft 46a of the motor 46 is attached. In front of the fan 20, that is, on the intake side, a plate-like friction body 31 having a size covering the opening of the container body 11 of the casing 10 is disposed, and a facing friction part 250 with which a protrusion 350 provided on the fan 20 abuts. is provided on the friction body 31 at a position facing the protrusion 350 of the fan 20 .

Therefore, when the fan 20 rotates, the projection 350 of the rotary friction body 351 attached to the central cylindrical part 26 of the fan 20 moves along the surface of the opposing friction part 250 of the friction body 31 arranged to face it. Rotational sliding occurs, and friction between the opposed friction portion 250 of the friction body 31 and the protrusion 350 of the rotary friction body 351 attached to the fan 20 causes the protrusion 350 of the fan 20, the rotary friction body 351, and the entire fan 20, Also, the facing friction portion 250 of the friction body 31 and the entire friction body 31 are charged with static electricity.
Therefore, the projection 350 of the fan 20, the rotary friction body 351, the entire fan 20, and the opposed friction part 250 and the entire friction body 31 having the opposed friction part 250 are charged with negative or positive electrostatic force, which causes the friction body 31 to The charged dust in the air can be adsorbed and captured by the filter 41, the friction body 31, and the fan 20 that are in contact with or arranged close to each other. In particular, according to the electrostatic force charged by the friction between the protrusion 350 of the fan 20 and the opposing friction portion 250 of the friction body 31, even charged dust particles finer than the mesh of the filter 41 can be It is also possible to make it adsorb to the filter 41 that is in contact with or arranged close to the . Furthermore, since an electrostatic field is formed between the friction body 31 and the fan 20, even minute charged particles that have passed through the filter 41 and whether they are positively or negatively charged will or the fan 20 can adsorb and collect the particles.

Thus, in the air purifier 1 according to Modification 1 as well, even if the mesh of the filter 41 is not fine, the opposing friction portion 250 of the friction body 31 adjacent to the filter 41 is caused by the rotation of the fan 20 that generates the air flow. The protrusion 350 of the rotary friction body 351 attached to the fan 20 rotates and slides to generate friction, and the friction causes the opposed friction part 250, the friction body 31 having the opposed friction part 250, and the protrusion 350 and the protrusion. Fine charged fine particles can be collected by the electrostatic force of the rotating friction body 351 having 350 and the fan 20, so fine collection efficiency can be improved with energy saving and low pressure loss. Therefore, a high collection efficiency can be obtained with a small amount of energy, so miniaturization is possible.

As described above, the air purifier 1 according to Modification 1 includes the fan 20 that generates an air flow by rotating and is arranged in the air path through which the air flows, allowing the air to flow and collecting dust in the air. a filter 41 as a collecting portion that collects the dust particles, and a protrusion that is integral with a friction rotating body 310 that is attached to the central cylindrical portion 26 of the fan 20 as a friction portion integral with the fan 20 that is electrically charged by being rubbed by the rotation of the fan 20. 350, which is provided in contact with or close to the filter 41, contacts the protrusion 350 of the friction rotating body 310, rubs against the protrusion 350 when the fan 20 rotates, and is charged with static electricity. It comprises a friction body 31 having an opening 33 for allowing flow and a facing friction portion 250 integrated therewith.

Modification 1 is composed of a container body 11 having a predetermined volume space and a lid member 12 covering an opening of the container body 11, and air intake port 15A and air exhaust port 15B are provided on the peripheral surface defining the predetermined volume. a fan 20 that is housed in the casing 11 and that rotates to generate an air flow that takes in air from the air intake port 15A and exhausts air from the air exhaust port 15B; , a filter 41 as a collecting unit that allows air to flow and collects dust in the air, and a fan friction unit that is integrated with the fan 20 that is frictionally charged by the rotation of the fan 20 housed in the casing 11 and is charged with static electricity. A protrusion 350 integral with the friction rotor 310 attached to the central cylindrical portion 26 of the fan 20 is provided in contact with or in close proximity to the filter 41 within the casing 11, and contacts the protrusion 350 of the friction rotor 310 to provide a fan. An air purifier provided with a friction body 31 having an opening 33 facing a fan 20 and allowing air to flow, and a facing friction part 250 integrated with the friction body 31, which is charged with static electricity by friction with the protrusion 350 when the fan 20 is rotated. It can also be regarded as the invention of No. 1.

In the air purifier 1 according to Modification 1 as well, the fan 20 is rotationally driven to generate an air flow, and the air flows through the filter 41 as the collecting portion. Specifically, the fan 20 is rotationally driven to generate an air flow, and external air is drawn from the intake port 15A of the lid 12 of the casing 10. It passes through the filter 41 as a part, passes through the opening 33 of the friction body 31 provided in contact with or close to the filter 41, and is exhausted from the exhaust port 15B of the container body 11 of the casing 10. At this time, the protrusion 350 of the friction rotating body 351 provided integrally with the fan 20 as the fan friction portion contacting the facing friction portion 250 of the friction body 31 provided facing the fan 20 When the facing friction portion 250 of the friction body 31 is slid by the rotational drive, the protrusion 350 of the fan 20 and the facing friction portion 250 of the friction body 31 rub against each other and are charged with static electricity. Therefore, due to the friction between the facing friction portion 250 of the friction body 31 provided in contact with or in close proximity to the filter 41 and the protrusion 350 of the fan 20, the friction body It is possible to cause the filter 41 to adsorb charged dust in the air flowing through the filter 41 that is in contact with or close to the filter 31 . Further, even fine charged particles that have passed through the mesh of the filter 41 can be attracted to the friction body 31 or the fan 20 side by the electrostatic force charged on the friction body 31 or the fan 20 side. In particular, according to such electrostatic force, fine particles such as pollen floating in the air, solid or liquid particles such as cigarette smoke, particles such as odorous gases, etc. Also, microorganisms floating in the air can be captured with low pressure loss.

Thus, in the air purifier 1 according to Modification 1 as well, the motion of the fan 20 for generating airflow and the motion of electrification by friction are made common, and dust is collected by electrification due to friction and corona discharge. Since it does not require a high voltage, it can be made safe, easy to handle, small, lightweight and inexpensive.

In particular, even in the air purifier 1 according to Modification 1, the filtration type filter 41 is used as the collecting part, and even if the mesh of the filter 41 is not fine, the charged particles finer than the mesh of the filter 41 are rubbed. It can be attracted to the filter 41 by the electrostatic force of the opposing friction part 250 and the friction body 31 charged by the friction between the opposing friction part 250 of the body 31 and the projection part 350 of the fan 20 . Further, even fine charged particles that have passed through the mesh of the filter 41 can be attracted to the friction body 31 or the filter 20 by the electrostatic force charged on the friction body 31 or the filter 20 side. Therefore, in addition to the filtration of dust by the mesh of the filter 41, finely charged dust is generated by the electrostatic force generated by the friction between the facing friction portion 250 of the friction body 31 and the protrusion 350 of the fan 20, which are in contact with or close to the filter 41. can be caught by the filter 41, the friction body 31, and the fan 20, high dust collection efficiency can be obtained without increasing ventilation resistance, that is, with low pressure loss, and both miniaturization and high dust collection efficiency can be achieved.

Also in the air purifier 1 according to Modification 1, the entirety of the fan 20 provided with the protrusion 350, the filter 41, and the friction body 31 provided with the opposing friction portion 250 is housed in the casing 10. It is small, easy to carry, and looks good.

Further, according to the air purifier 1 according to Modification 1, the fan 20 is provided with the protrusion 350 as the fan friction portion, and the protrusion 350 slides on the friction body 31 provided between the filter 41 and the fan 20. The opposing friction portion 250 having a larger friction area than the protrusion 350 is formed. It is possible to increase the collection rate of collecting dust.

[Modification 2]
Furthermore, another modified example 2 of the air purifier 1 of the above embodiment will be described with reference to FIG. 11 .
In Modified Example 1, the friction rotor 351 attached to the central cylindrical portion 26 of the fan 20 is provided with a protrusion 350 that abuts against the opposing friction portion 250 of the friction member 31 arranged opposite to the fan 20 .
On the other hand, in Modification 2, a projecting portion 350 is formed around the central cylindrical portion 26 of the fan 20 so as to abut on the opposing friction portion 250 of the friction body 31 arranged to face the fan 20 . That is, the projection 350 is formed integrally with the circular substrate 21 that constitutes the fan 20 . Since the rest of the configuration is the same as that of Modified Example 1, redundant description will be omitted.

For example, as shown in FIG. 11, one or two or more protrusions 350 having a rectangular cross section are formed on the circular substrate 21 around the cylindrical portion 26 of the fan 20 at predetermined intervals along the circumferential direction. to be established.

In this way, by forming the protrusion 350 that partially abuts on the opposing friction portion 250 of the friction body 31 integrally with the circular substrate 21 around the cylindrical portion 26 of the fan 20, it is possible to achieve the same effect as in the first modification. Similarly, by rubbing the facing friction portion 250, the protrusion 350, the fan 20 having the protrusion 350, and the opposing friction portion 250 and the friction body 31 integral with the opposing friction portion 250 are charged with static electricity, and the opposing friction portion 250 is charged with static electricity. The charged particles floating in the air can be collected by the filter 41, the friction body 31, and the fan 20 provided in contact with or in close proximity to.

Next, an air purifier unit using the air purifier 1 according to the above embodiment and modifications will be described.
An air purifier unit according to an embodiment of the present invention comprises two air purifiers 1 (two units) described in the above-described embodiment and modification as one set.

For example, in the air purifier unit using the air purifier 1 according to the above-described embodiment, the friction between the fan friction portion 25 of the fan 20 and the protrusion 35 of the friction body 31 as the opposed friction portion causes and the air purifier 1 in which the friction body 31 having the protrusion 35 is positively charged, and the fan friction part 25 of the fan 20 and the protrusion 35 of the friction body 31 as the opposing friction part. The projection 35 as a part and the air purifier 1 in which the friction body 31 having the projection 35 is negatively charged.
In the air purifier unit using the air purifier 1 according to the modified example, the friction between the protrusion 350 as the fan friction portion provided on the fan 20 and the opposing friction portion 250 of the friction body 31 causes the opposing friction portion 250 to The friction between the air purifier 1 in which the friction body 31 having the opposite friction part 250 is positively charged, and the projection part 350 as the fan friction part provided on the fan 20 and the opposite friction part 250 of the friction body 31 causes the opposite friction part 250 and the friction body 31 having the opposing friction portion 250 is composed of one set of the air purifier 1 in which the friction body 31 is negatively charged.

According to the air purifier unit combining the air purifiers 1 having positive and negative electrification polarities of the protrusion 35 and the opposed friction portion 250, one of the first air purifiers 1 Alternatively, positively charged particles in the air are likely to be collected by the second air cleaner 1, and negatively charged particles in the air are collected by the other second air cleaner 1 or the first air cleaner 1. Because it is easy to collect, it is possible to collect a wide range of different types of particles, resulting in high air purification efficiency and effective air deodorization (deodorization, deodorization).

In particular, when the air purifiers 1 in which the opposing frictional portions 35 and 250 are charged with opposite polarities are arranged close to each other, the opposing frictional portions of the first air purifier 1 and the second air purifier 1 The electric field intensity generated by the electrification of 35, 250 is strengthened. An electrostatic field can be expected to form between the opposing friction portions 35 and 250 charged with static electricity having a polarity opposite to that of the friction portions 35 and 250, and regardless of whether the particles are positively or negatively charged, An improvement in collection efficiency can be expected. In addition, the air sucked from the air inlet 15A of one air cleaner 1 and exhausted from the air outlet 15B by the rotational driving of the fan 20 of each air cleaner 1 of the air cleaner unit is filtered 41, the friction body 31, and the like. Due to an increase in the concentration of positively or negatively charged particles that have passed through the fan 20 without being adsorbed, and an increase in the amount of charge due to aggregation, the particles are adsorbed to the filter 41, the friction member 31, and the fan 20 of the other air cleaner 1. You can also expect the effect of making it easier to do.

The air purifier unit described above includes a fan 20 that generates an air flow by rotational driving, and a filter that is disposed in an air path through which the air flows to allow the air to flow and collect dust in the air. 41, a fan friction portion 25 or a projection 350 integrated with the fan 20 that is rubbed by the rotation of the fan 20 and charged with static electricity, and a fan friction portion 25 or projection 350 provided in contact with or close to the filter 41 and the fan friction portion 25 or projection of the fan 20. The protrusion 35 or the opposing friction portion 250 is integral with the friction member 35 facing the fan 20, and is charged with static electricity by contacting the portion 350 and frictionally with the fan friction portion 25 or the protrusion 350 when the fan 20 rotates. A first air purifier 1, a fan 20 for generating an air flow by rotational driving, and a collecting section arranged in an air path through which the air flows to allow the air to flow and collect dust in the air. a filter 41 of the fan 20, a fan friction portion 25 or a protrusion 350 integrated with the fan 20 that is electrically charged by being rubbed by the rotation of the fan 20, and a fan friction portion 25 of the fan 20 provided in contact with or in proximity to the filter 41 Alternatively, contact with the projection 350 and friction with the fan friction part 25 or the projection 350 due to the rotational driving of the fan 20 causes the static electricity to have a polarity opposite to the charging polarity of the projection 35 or the opposing friction part 250 of the first air cleaner 1 . and a second air purifier 1 having a friction body 35 facing the fan 20 and an integral protrusion 35 or a facing friction part 250 for electrifying the fan 20 .

In the above description, the container main body 11 having a predetermined volume space and the lid body 12 covering the opening of the container main body 11 are formed. , a fan 20 which rotates to generate a flow of air taken in from the intake port 15A and exhausted from the exhaust port 15B; A filter 41 as a collecting portion, a fan friction portion 25 or a projection portion 350 integrated with the fan 20 that is rubbed by the rotational driving of the fan 20 and charged with static electricity, and is provided in contact with or close to the filter 41, and the fan of the fan 20 Protrusion 35 integrated with friction body 35 facing fan 20 or facing friction, which contacts the friction part 25 or the protrusion 350 and is charged with static electricity by friction with the fan friction part 25 or the protrusion 350 when the fan 20 is rotationally driven. A first air purifier 1 having a part 250, a container body 11 having a predetermined volume space, and a lid body 12 covering the opening of the container body 11, and having an air intake port 15A and an air exhaust port 15B. A casing 11, a fan 20 that is housed in the casing 11 and is rotationally driven to generate the flow of air that is taken in from the intake port 15A and exhausted from the exhaust port 15B, the fan 20 that is rotationally driven to generate the air flow, and the air is A filter 41 disposed in a flowing air path to allow the air to flow and collect dust in the air, and a fan friction part integrated with the fan 20 to be rubbed by the rotation of the fan 20 and charged with static electricity. 25 or projections 350 are provided in contact with or in close proximity to the filter 41, contact with the fan frictional portion 25 or the projections 350 of the fan 20, and rub against the fan frictional portion 25 or the projections 350 when the fan 20 is rotationally driven. The protrusion 35 or the opposing friction portion 250 integrated with the friction body 35 facing the fan 20 is charged with static electricity having a polarity opposite to that of the protrusion 35 or the opposing friction portion 250 of the first air cleaner 1. It can also be regarded as an invention of an air purifier unit having the second air purifier 1.

According to such an air purifier unit, in each of the first air purifier 1 and the second air purifier 1, the fan 20 is rotationally driven to generate an air flow, and the air flows through the filter 41 as the collector. . Specifically, the fan 20 is rotationally driven to generate an air flow, and external air is drawn from the intake port 15A of the lid 12 of the casing 10. It passes through the filter 41 as a part, passes through the opening 33 of the friction body 31 provided in contact with or close to the filter 41, and is exhausted from the exhaust port 15B of the container body 11 of the casing 10.

At this time, in each of the first air purifier 1 and the second air purifier 1, the protrusion 35 of the friction body 31 in contact with the fan friction portion 25 of the fan 20 rotates and drives the fan 20 so that the fan friction of the fan 20 is caused. The portion 25 rubs against the protrusion 35 of the friction body 31 and is charged with static electricity. Therefore, due to the friction between the protrusion 35 of the friction body 31 and the fan friction part 25 of the fan 20, the protrusion 35 and the entire friction body 31 having the protrusion 35 are electrically charged, and the contact or proximity to the friction body 31 is caused. It becomes possible to cause the filter 41 to adsorb charged dust in the air flowing through the filter 41 .

Alternatively, in the case of the modified example described above, the protrusion 350 of the fan 20 in contact with the opposing friction portion 250 of the friction body 31 slides on the opposing friction portion 250 of the fan 20 due to the rotation of the fan 20, thereby causing the fan to rotate. The protrusion 350 of 20 and the opposing friction portion 250 of the friction body 31 rub against each other and are charged with static electricity. Therefore, due to the friction between the opposed friction portion 250 of the friction body 31 and the protrusion 350 of the fan 20, the entire friction body 31 having the opposed friction portion 250 and the opposed friction portion 250 is electrically charged, and the friction body 31 is contacted or It is possible to cause the filter 41 to adsorb charged dust in the air flowing through the filter 41 in close proximity.

According to the first air purifier 1 and the second air purifier 1 of such an air purifying unit, even fine charged particles that pass through the mesh of the filter 41 are charged to the friction body 31 and the fan 20. It can be attracted to the friction body 31 and the fan 20 by electrostatic force. In particular, according to such electrostatic force, fine particles such as pollen floating in the air, solid or liquid particles such as cigarette smoke, particles such as odorous gases, etc. Also, microorganisms floating in the air can be captured with low pressure loss.

In such an air cleaning unit as well, the first air cleaner 1 and the second air cleaner 1 share the motion of the fan 20 that generates the air flow and the motion of electrifying by friction. Since it collects dust by charging and does not require high voltage for corona discharge, it can be made safe, easy to handle, compact, lightweight and inexpensive.

Since the filtering type filter 41 is used as the collecting part, the charged particles finer than the mesh of the filter 41 can be attracted to the filter 41 by the electrostatic force of the friction body 31 without making the mesh of the filter 41 finer. It is a thing. Further, even fine charged particles that have passed through the mesh of the filter 41 can be attracted to the friction body 31 or the filter 20 by the electrostatic force charged on the friction body 31 or the filter 20 side. Therefore, in addition to the filtration of dust by the eyes of the filter 41, finely charged dust can also be captured by the filter 41, the friction bodies 31, and the fan 20 due to the electrostatic force charged on the friction bodies 31 in contact with or in close proximity to the filter 41. High dust collection efficiency can be obtained without increasing resistance, that is, with low pressure loss, and both miniaturization and high dust collection efficiency can be achieved.

In particular, according to this air purifier unit, since the opposing friction portions 35, 250 of the first air purifier 1 and the opposing friction portions 35, 250 of the second air purifier 1 have a pair of charging polarities, , both the negatively charged dust and the positively charged dust in the air are collected by the filter 41 as the collecting portion of the first air cleaner 1 and the filter 41 as the collecting portion of the second air cleaner 1. Since the particles can be collected, that is, the particles can be collected regardless of the polarity of the charged particles, a high collection efficiency can be obtained regardless of the ambient environmental conditions.

By the way, in the above-described embodiment and modification, the fan 20 is a fan on the side of the centrifugal turbo, and even with a small number of blades, the efficiency of the air flow is improved and the thickness can be reduced, but the present invention is implemented. In some cases, other centrifugal fans, sirocco fans, axial fans, etc. may be used.

Here, in the above-described embodiment and modified example, the filter 41 made of a filter-type nonwoven fabric is used as the collecting part, but when carrying out the present invention, the filter 41 is not limited to a nonwoven fabric, and can be a net-like filter. , woven fabrics, knitted fabrics, and the like. Furthermore, when carrying out the present invention, the collecting part such as the filter 41 is not limited to being disposed inside the casing 10, but is disposed outside the casing 11, for example, on the outer surface side of the lid 12. may be adhered to. As a result, dirt on the collecting portion can be easily visually recognized, the effect of air cleaning can be visually recognized, and the timing of replacement of the collecting portion such as the filter 41 is easy to understand and can be easily replaced.
Further, when carrying out the present invention, the filter 41 may be omitted and the plate-shaped frictional body 31 charged with static electricity may be used as the collecting portion, or both the filter 41 and the frictional body 31 may be used as the collecting portion. . The shape of the friction body 31 is not limited to the shape of the radially arranged openings as long as it has a structure that permits ventilation. may be

Further, in the above-described embodiment and modification, the plate-like friction body 31 is arranged between the fan 20 and the filter 41, and the plate-like friction body 31 is provided with the protrusion 35 or the opposing friction part 250. However, when carrying out the present invention, the friction body 31 may be omitted and the projection 35 integrated with the filter 41 or the opposing friction portion 250 may be provided.

Furthermore, in the above embodiments and modifications, the projections 35 and 350 are linear or curved flat plates or rectangular parallelepipeds with a rectangular cross section, and the tips are linear or planar. However, when carrying out the present invention, it is not limited to them, and for example, the tip may be curved, brush, brush, fibrous, sponge-like, or the like.

In the above embodiment and modification, the motor 46 that rotates the fan 20 is driven by the dry battery 41 as a power source. As a result, the range of movement is not limited, and it can be freely carried indoors or outdoors (outdoors), that is, even in places without power wiring, and dust in the air, such as pollen floating in the air, cigarette smoke, etc. It is possible to remove solid or liquid particles such as odorous gas, and microorganisms floating in the air.

In particular, according to the air purifier 1 of the present embodiment and the working example, the movement of the fan 20 and the movement of friction by the fan friction portions 25 and 350 and the opposing friction portions 35 and 250 are made common, and the fan friction portion 25 , 350 and the friction between the opposing friction portions 35 and 250, and collects the charged dust in the air by the electrostatic force. Therefore, for example, as shown in FIG. 12, a string, a strap, or the like is passed through an annular portion 19 (see FIG. 8) formed on the bottom side of the container body 11 of the casing 10 to form a loop, and it can be worn around the neck. It is also possible to make the air purifier 1 small, lightweight and inexpensive as a whole. In such a usage pattern, external air is taken in from the intake port 15A of the casing 10 by the operation of the fan 20, and dust in the air is collected by the collecting portion such as the filter 41 and exhausted from the exhaust port 15B of the casing 10. By doing so, it is possible to breathe the air cleaned by the air purifier 1 . If you are a smoker, you can use the air purifier 1 to remove and deodorize (deodorize, deodorize) cigarette smoke, tar, odors, and the like. Furthermore, it is also possible to obtain coolness by the air flow exhausted from the exhaust port 15B of the casing 10. FIG. In addition, since the air purifier 1 can collect dust, for example, fine particles such as charged pollen, it is possible to prevent fine particles such as charged pollen from adhering to the body, clothes, and the like. It is also possible to suppress the generation of static electricity by making it difficult for charged particles to adhere to clothing or the like. When the amount of electrification of the friction body 31 is high, the effect of preventing charged particles of the same polarity from adhering to the body or clothes can be expected.

Also, if the air purifier 1 is small, it can be worn around the neck when riding a train or bus, or can be carried in a bag or the like. Furthermore, such a portable small air purifier 1 can be placed around a desk in an office or the like to purify and deodorize the air, or can be carried in a closed room where the air tends to stagnate and dust tends to accumulate in the car interior space. It is also possible to purify and deodorize the air. Of course, it is also possible to adopt a mode of use in which it is installed indoors in offices, stores, homes, etc., for example, in living rooms, entrances, toilets, and the like.

In the case of carrying out the present invention, an AC power supply for household use may be used as a power supply by inserting a plug into an outlet for household use, etc., or a storage battery such as a rechargeable battery may be used. may
In addition, in the above-described embodiment and modification, the casing 10 is configured to accommodate a fan and the like. etc., furniture such as tables, desks, shoe cupboards, chairs, sofas, etc., frames or housings such as wall hangings, etc., may be incorporated into a part thereof.

Reference Signs List 1 air purifier 10 casing 15A intake port 15B exhaust port 20 fan 25 fan friction portion 35 protrusion (facing friction portion)
41 filter (collecting part)
250 opposing friction portion 350 projection (fan friction portion)

Claims (6)

a fan that is driven to generate an air flow;
a collection unit disposed on the intake side of the fan for collecting dust in the air while allowing the air to flow;
a fan friction portion integrated with the fan that is rubbed and charged with static electricity when the fan rotates;
The fan, which constitutes the collection section or is provided in contact with or in close proximity to the collection section, contacts the fan friction section, rubs against the fan friction section when the fan rotates, and is charged with static electricity. An air purifier comprising: a facing friction portion facing a a casing having an air intake port and an air exhaust port on a peripheral surface defining an accommodation space of predetermined volume;
a fan that is housed in the casing and that rotates to generate a flow of air that is taken in from the intake port and exhausted to the exhaust port;
a collection unit disposed on the intake side of the fan inside or outside the casing and allowing the air to flow to collect dust in the air;
a fan friction portion integrated with the fan that is rubbed and charged with static electricity when the fan rotates;
The fan, which constitutes the collection section or is provided in contact with or in close proximity to the collection section, contacts the fan friction section, rubs against the fan friction section when the fan rotates, and is charged with static electricity. An air purifier comprising: a facing friction portion facing a 3. The air purifier according to claim 1, wherein the collection part is composed of a filter. The air purifier according to any one of claims 1 to 3, wherein the fan friction portion is a part of the fan and has a larger friction area than the opposing friction portion. The air purifier according to any one of claims 1 to 3, wherein the opposing friction portion has a larger friction area than the fan friction portion. a fan that generates an air flow by rotational driving; a collecting unit disposed on the intake side of the fan that allows the air to flow and collects dust in the air; and the rotational driving of the fan. A fan friction portion integral with the fan that is rubbed and charged with static electricity constitutes the collection portion, or is provided in contact with or in proximity to the collection portion, and is in contact with the fan friction portion to rotate the fan. a first air purifier having a facing friction portion facing the fan, which is electrically charged by friction with the fan friction portion when driven;
a fan that generates an air flow by rotational driving; a collecting unit disposed on the intake side of the fan that allows the air to flow and collects dust in the air; and the rotational driving of the fan. A fan friction portion integral with the fan that is rubbed and charged with static electricity constitutes the collection portion, or is provided in contact with or in proximity to the collection portion, and is in contact with the fan friction portion to rotate the fan. A second air purifier having an opposing friction portion opposed to the fan, which is driven to friction with the fan friction portion and charged with static electricity having a polarity opposite to that of the opposing friction portion of the first air purifier. and .

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