JP6240818B2 - Air filter device, air intake device, and dust collecting device - Google Patents

Description

  The present invention relates to an air filter device, an air intake device, and a dust collecting device that remove dust from the air by forming a swirling flow by rotation of a fan.

  Usually, air supplied to an engine mounted on an automobile or the like is taken in from the outside, and then dust is removed by a filter. However, if this filter is clogged, air resistance will increase, causing not only power reduction and fuel consumption deterioration, but also generation of harmful components in the exhaust gas. Is needed.

  Further, conventionally, after the gas sucked from the inlet provided in the circumferential direction of the container is swung along the inner peripheral surface of the container, the gas is exhausted from the center of the container, and dust contained in the air is removed from the container. A cyclone dust collecting device that collects at the bottom of the hood and a vacuum cleaner equipped with the same have been proposed (see, for example, Patent Document 1).

  There has also been proposed a cooling device that includes a fan and a cover that is provided so as to surround the windward side of the fan and that has an intake opening. In such a cooling device, when the outside air for cooling is introduced into the cover through the intake opening, dust contained in the outside air for cooling is centrifugally separated radially outward by the swirl flow formed by the rotation of the fan. The dust is prevented from being sent to the downstream side of the fan together with the outside air for cooling (see, for example, Patent Document 2).

JP 2006-75584 A Japanese Patent No. 4688971

  Usually, it is recommended to replace the filter every 25,000 km to 50,000 km. However, even if the filter is replaced at such recommended timing, the filter clogging gradually proceeds according to the travel distance immediately after the filter replacement, and therefore it is not possible to completely avoid fuel consumption deterioration due to filter clogging. could not.

  Further, in the cyclone dust collecting device described in Patent Document 1 described above, sufficient centrifugal force does not work in the container, and relatively large dust can be collected at the bottom of the container. Could not be collected at the bottom of the container. Therefore, in order to collect these fine dusts with certainty, it is necessary to provide a filter separately, and there is a problem that the filter is clogged due to long-term use.

  On the other hand, in the cooling device described in Patent Document 2, since sufficient centrifugal force can be generated, even fine dust can be separated from the outside air for cooling. However, in the cooling device described in Patent Document 2, there is a possibility that dust contained in the cooling outside air flowing through the laminar flow may be sent to the downstream side of the fan together with the cooling outside air. That is, in FIG. 15, the cooling outside air introduced from the peripheral region of the intake opening 732 formed in the cover 703 forms a swirling flow, but the cooling outside air introduced through the central region of the intake opening 732. Forms a laminar flow. Since the intake opening 732 has an opening center C on the extension line A of the fan rotation axis, the laminar flow flows through the center of the swirl flow formed by the rotation of the fan, that is, in the region where the angular velocity is zero. There is a problem that dust contained in the cooling outside air forming the flow is sent to the downstream side of the fan together with the cooling outside air without being centrifuged from the cooling outside air.

  A first object of the present invention is to provide an air filter device capable of more effectively removing dust from the air and a dust collecting device using the same.

  A second object of the present invention is to provide an air filter device and an intake device that can prevent clogging of a filter used in an automobile or the like.

An air filter device according to the present invention includes a fan for generating an airflow and a casing for housing the fan, and an air intake opening is formed on a front end side of the casing in a first predetermined direction. Is arranged on the base end side of the casing in the first predetermined direction, and when the fan rotates in the second predetermined direction, a forced vortex flowing from the intake opening toward the fan by the rotation of the fan. A swirl flow is formed, and a flow of a circulating vortex flowing toward the intake opening in the inner peripheral region of the casing is formed outside the swirl flow, and is introduced into the casing through the intake opening. The dust contained in the air is centrifugally separated radially outward by the swirl flow, and then flows in the inner peripheral area of the casing by the flow of the circulating vortex. Flowing to the intake opening side, the central position of the intake opening is deviated from the extension of the rotation axis of the fan, the intake opening is located within a predetermined cylindrical region coaxial with the rotation axis of the fan, predetermined cylinder area have a turning radius and the same radius of the fan, the intake opening, and being provided in place of the openings having an opening centered on the extension of the rotational axis of the fan To do.
The dust collector of the present invention includes an air filter device and a cover member attached to the air filter device, and a dust collection space is defined between the air filter device and the cover member, The air filter device includes a fan for generating an airflow, and a casing for housing the fan, and a housing opening and a communication opening are formed on a front end side of the casing in a first predetermined direction, The fan is disposed on the base end side of the casing in the first predetermined direction, the dust collection space communicates with the communication opening, and an air intake opening is formed on a front end side of the cover member. A cylindrical portion extending toward the base end side of the cover member is provided at a peripheral portion of the opening, and the cylindrical portion extends through the housing opening to the inside of the casing. Line direction and being inclined relative to the axial direction of the rotary shaft of the fan.
An air filter device according to the present invention is an air filter device that prevents dust from entering an intake device connected to an engine, the casing being connected to an intake port of the intake device, and the casing being accommodated in the casing. comprising a fan, a, on the tip side of the casing in a first predetermined direction suction opening is formed, the fan is disposed on the base end side of the casing in the first predetermined direction, a motor, An impeller that is rotationally driven by the motor, and the impeller includes a rotational shaft that is rotationally driven by the motor and a blade that is attached to the rotational shaft, and the axial direction of the rotational shaft is the first is a predetermined direction and substantially parallel, said blades, said formed in a plate shape having an axial and substantially parallel to the wide surface of the rotary shaft, front together with the engine is driven When the fan is rotated in a second predetermined direction, with an external air is introduced into the casing through the intake opening by the intake effect of said engine, said fan from the intake opening by rotation of the fan A swirling flow of forced vortex flowing toward the intake opening is formed, and a flow of a circulating vortex flowing toward the intake opening side in the inner peripheral region of the casing is formed outside the swirling flow, and the flow through the intake opening dust contained in air introduced into the casing, flows through the inner circumferential region of the casing by the flow of the circulating vortex after being centrifuged radially outward by the swirling flow in the intake opening side, wherein The central position of the intake opening is deviated from the extension of the rotation axis of the fan, and the intake opening is located within a predetermined cylindrical area coaxial with the rotation axis of the fan. The predetermined cylindrical region has a radius of gyration of the same radius of the fan, the intake opening, characterized that you have provided instead of the opening having an opening centered on the extension of the rotational axis of the fan And

According to the air filter device of the present invention, since the center position of the intake opening is deviated from the extended line of the rotation axis of the fan, it is dust contained in the air introduced through the center position of the intake opening. However, it can be effectively centrifuged. Further, since the intake opening is located in a predetermined cylindrical area coaxial with the rotation axis, and the cylindrical area has the same radius as the rotation radius of the fan, a forced vortex can be effectively formed.
Further, at the peripheral portion of the air intake opening tubular portion is provided, since the external air is introduced into the casing through the inlet opening and the cylindrical portion, to form a circulating vortex efficient Can do. Further, since the axial direction of the cylindrical portion is inclined with respect to the axial direction of the rotating shaft, even if dust is contained in the air introduced through the center position of the intake opening, it is effectively centrifuged. Can be separated.
According to the air filter device of the present invention, the dust contained in the air introduced into the casing through the intake opening is centrifugally separated radially outward by the swirling flow, and then the casing is formed by the flow of the circulating vortex. Since it flows to the intake opening side in the inner peripheral area, it is possible to prevent dust from flowing to the base end side of the casing through the fan, thereby preventing dust from entering the inside of the intake device. Therefore, clogging in the filter provided in the intake device can be prevented, and filter replacement work and filter replacement cost are not required. Further, an increase in air resistance due to clogging of the filter can be prevented, and a reduction in engine combustion efficiency can be prevented.

  Furthermore, since the blade is formed in a flat plate shape having a wide surface substantially parallel to the axial direction of the rotating shaft, it is possible to efficiently form forced vortices and centrifuge dust well, and It has a minimum area in the axial direction, and the air resistance caused by using the blade can be minimized.

  Further, since the blade rotates in the casing, the air introduced from the intake opening portion can be discharged from the base end side using the inertia effect, so that the function as a supercharger for the engine can be exhibited. .

1 is a schematic cross-sectional view showing an air filter device according to a first embodiment of the present invention. Explanatory drawing which shows the positional relationship of the suction opening part and the central axis of a fan in the air filter apparatus shown in FIG. It is an operation principle explanatory view showing the flow of air in the air filter device shown in FIG. 1, and is an exploded view showing a hood cover and an impeller. The conceptual diagram which shows the relationship between the laminar flow and turbulent flow in the air filter apparatus shown in FIG. Schematic which shows the Example at the time of using the air filter apparatus shown in FIG. 1 as a cooling device. Schematic which shows the other Example at the time of using the air filter apparatus shown in FIG. 1 as a cooling device. It is a schematic sectional drawing of the dust collector which concerns on 2nd Embodiment of this invention, (a) is an operation principle explanatory drawing which shows the flow of air, (b) is an exploded view. It is the schematic which shows the air filter apparatus which concerns on 3rd Embodiment of this invention, (a) is a partially transparent figure, (b) is an operation principle explanatory drawing which shows the flow of air. It is a figure which shows the Example at the time of attaching and using the air filter apparatus shown in FIG. 8 for an intake device, (a) is a schematic external view which shows an intake device, (b) is an air filter apparatus in an intake device. The outline appearance figure showing the state made to wear. The schematic sectional drawing which shows the structure of the dust collector which concerns on 4th Embodiment of this invention. It is a figure which shows the Example at the time of applying the dust collector shown in FIG. 10 to an air cleaner, Comprising: (a) is a perspective view of an air cleaner, (b) is a perspective view of an air cleaner. It is a figure which shows the Example at the time of applying the dust collector shown in FIG. 10 to a handy type cleaner, (a) is a schematic external view of a cleaner, (b) is a schematic sectional drawing of a cleaner. (A) is a figure which shows the modification of a braid | blade, (b) is a figure which shows the other modification of a braid | blade. The schematic sectional drawing which shows the modification of embodiment of this invention. The conceptual diagram which shows the laminar flow in the conventional cooling device.

[First Embodiment]
An air filter device according to a first embodiment of the present invention will be described with reference to the accompanying drawings. With reference to FIG. 1, an air filter device 1 according to the present embodiment includes a fan 2 for generating an airflow and a hood cover 3 that covers the fan 2, and the fan 2 is a hood cover 3 in a predetermined direction X. Is arranged on the base end side (right side in FIG. 1).

  The fan 2 in the present embodiment is an axial-flow rotating fan, and includes a cylindrical housing 21, an impeller 22 that is rotatably supported by the housing 21, and a drive motor 23 that rotationally drives the impeller 22. ,have. The impeller 22 has a rotating shaft 24 extending in a predetermined direction X and a plurality of blades 25 extending radially outward from the rotating shaft 24. A bullet-shaped swirl flow forming auxiliary projection (swirl flow forming auxiliary means) 4 is fixedly supported on the rotating shaft 24. The swirl flow forming auxiliary protrusion 4 extends toward the front end side of the hood cover 3 in the predetermined direction X (the intake opening 32 side described later, the left side in FIG. 1) to the vicinity of the axial center position of the hood cover 3. . Further, the diameter of the swirl flow forming auxiliary protrusion 4 is configured to be substantially equal to the diameter of the rotating shaft 24. When the impeller 22 rotates in a predetermined direction, the swirl flow forming auxiliary protrusion 4 rotates integrally with the impeller 22. An exhaust opening 26 is defined on the proximal end side of the housing 21.

  The hood cover 3 is detachably attached to the housing 21 of the fan 2. The hood cover 3 is configured in a cannonball shape, the base end side thereof is configured in a cylindrical shape and surrounds the front periphery of the fan 2, and the tip end side thereof is configured in a hemispherical shape so as to be a part of the front of the fan 2. Besiege. Further, an intake opening 32 and a communication opening 33 are formed on the front end side of the hood cover 3. In this embodiment and third and fourth embodiments described later, the hood cover 3 and the housing 21 constitute a casing.

  The intake opening 32 is preferably opposed to the impeller 22 of the fan 2 in the predetermined direction X. In other words, referring also to FIG. 2, when a cylindrical region that is coaxial with the rotational axis 24 of the fan 2 and has a radius substantially the same as the rotational radius of the fan 2 is defined as the cylindrical region R, The intake opening 32 is preferably located in the cylindrical region R. Further, in the present embodiment, the center position C of the intake opening 32 is deviated from the extension line A of the rotation axis of the fan 2, and the amount of deviation is preferably at least 1 millimeter or more. Here, if the center position C is deviated from the extension line A of the rotation axis of the fan 2, the intake opening 32 is provided on the extension line A of the rotation axis of the fan 2 as shown by a solid line in FIG. Alternatively, it may be provided at a position deviated from the extension line A of the axis of the fan 2 as indicated by a one-dot chain line in FIG. Further, the opening area of the intake opening 32 is configured to be smaller than the transverse area on the base end side of the hood cover 3.

  Next, the flow of air in the air filter device 1 of the present embodiment will be described with reference to FIG. When the fan 2 operates and the impeller 22 rotates in a predetermined direction, air is introduced into the hood cover 3 through the intake opening 32. At this time, a swirl flow F <b> 2 of a forced vortex that flows from the intake opening 32 toward the impeller 22 by the rotation of the impeller 22 is formed inside the hood cover 3. That is, a part of the rotational kinetic energy of the rotating shaft 24 of the fan 2 becomes a source of external kinetic energy necessary for generating the forced vortex swirl F2.

  The air introduced from the outside through the intake opening 32 flows from the intake opening 32 toward the impeller 22 while rotating spirally in a predetermined direction by the swirl flow F2 of the forced vortex. Further, in the vicinity of the upstream side of the impeller 22, the forced vortex swirl flow F <b> 2 is spread outward in the radial direction by the swirl flow formation auxiliary protrusion 4, and the forced vortex swirl flow around the swirl flow formation auxiliary protrusion 4. F2 is formed. Furthermore, as described above, since the opening area of the intake opening 32 is configured to be smaller than the cross-sectional area on the proximal end side of the hood cover 3, the inner peripheral area of the hood cover 3 in the vicinity of the intake opening 32 The separation flow zone S is formed by the structure of the expansion tube. In the separation flow area S, a gas vortex flow F3 flowing toward the intake opening 32 is formed.

  Here, when the dust D (indicated by x in the drawing) enters the inside of the hood cover 3 from the intake opening 32 together with air, the dust D opens the intake opening while drawing a spiral trajectory by the forced swirl flow F2. It flows from the part 32 toward the impeller 22. Since the forced vortex has the property that the angular velocity and the atmospheric pressure increase in proportion to the distance from the center, the dust D is centrifuged radially outward by the swirling flow F2 of the forced vortex while flowing in this way. As described above, the swirl flow F2 is pushed and spread outward in the radial direction by the swirl flow forming auxiliary protrusion 4, whereby the flow velocity in the rotational direction of the swirl flow F2 is increased in the vicinity of the upstream side of the impeller 22. Thereby, the pressure in the vicinity of the upstream side of the impeller 22 becomes larger than the pressure in the separation flow area S. As a result of this pressure difference, the dust D centrifuged as described above is introduced into the separation flow area S, and the inner periphery of the hood cover 3 by the flow F3 of the circulating vortex flowing toward the intake opening 32 side. The region flows toward the tip side while drawing a spiral trajectory in a predetermined direction.

  Here, since the intake opening 32 is located in the above-described cylindrical region R, a forced vortex swirl flow F2 is effectively formed. Further, since the center position C of the intake opening 32 is deviated from the extension line A of the rotation axis of the fan 2, the air flow through the center position C of the intake opening 32 is a curve as shown in FIG. L is drawn, and in this curve L, the laminar flow flowing through the center portion is disturbed to form a turbulent flow region S2. Therefore, the dust D contained in the laminar flow is caught in the swirl flow F2 of the forced vortex in the turbulent flow region S2, and is centrifuged radially outward. That is, the flow formed by the air introduced through the center position C of the intake opening 32 deviates from the center (point where the angular velocity is zero) of the swirling flow F2 formed by the rotation of the fan 2, and thus the intake opening The laminar flow that passes through the center position C of the portion 32 disappears (or decreases) at the curved portion, whereby the dust D can be effectively centrifuged.

  Thus, in the air filter device 1 according to the present embodiment, the laminar flow is disturbed to form the turbulent flow region S2, so that the dust D can be effectively centrifuged from the air introduced from the intake opening 32. it can.

  A part of the dust D that has flowed to the front end side of the hood cover 3 due to the circulation vortex flow F3 as described above is discharged to the outside of the hood cover 3 through the communication opening 33 of the hood cover 3. Further, the dust D remaining inside the hood cover 3 swirls in a predetermined direction in the inner peripheral region of the hood cover 3, and thus does not affect the passing air volume of the fan 2. On the other hand, the clean air from which the dust D has been removed as described above is discharged from the exhaust opening 26 defined on the base end side of the housing 21.

  Thus, according to the air filter device 1 in the present embodiment, the dust D can be effectively centrifuged, so that only clean air can be discharged from the exhaust opening 26, and the dust D Can be prevented from adhering to the blade 25 of the fan 2.

  The air filter device 1 configured as described above can be used as a cooling device in, for example, an electronic device or a home appliance, and can also be used as a constituent member of a dust collecting device such as an air cleaner or a vacuum cleaner. Hereinafter, Examples 1 and 2 in the case where the air filter device 1 is used as a cooling device will be described.

[Example 1]
Referring to FIG. 5, the illustrated device 100 includes, for example, an electronic device such as a DVD recorder, a surveillance camera, and a projector, an electric product such as a refrigerator, a microwave oven, and a rice cooker, and a box-shaped casing 101. It has. A circuit board 102 is accommodated in the housing 101, and a heat generating member 104 such as a semiconductor device is mounted on the circuit board 102. In addition to the circuit board 102, various electronic components (not shown) are accommodated in the housing 101. An air inlet 106 is provided in the side wall 101 a of the housing 101, and the air filter device 1 as a cooling device is attached to the air inlet 106. Further, the side wall 101a of the casing 101 is provided with an exhaust port 107a for discharging the outside air for cooling sent into the casing 101 to the outside.

  In this configuration, when the fan 2 operates and the impeller 22 rotates in a predetermined direction, air (cooling outside air) is introduced into the hood cover 3 through the intake opening 32. The dust D that has entered the inside of the hood cover 3 together with the outside air for cooling is discharged to the outside through the communication opening 33 as described above.

  On the other hand, the clean cooling outside air from which the dust D is removed is sent into the housing 101 through the fan 2 and flows through the housing 101 while cooling the heat generating component 104 of the circuit board 102. As a result, the pressure inside the casing 101 rises and a pressure difference between the inside and outside of the casing 101 is generated, so that the outside air for cooling in the casing 101 is discharged to the outside through the exhaust port 107a. In this way, it is possible to prevent the dust D from entering the inside of the housing 101, thereby preventing, for example, the dust D from adhering to the circuit board 102 and malfunctioning of the circuit board 104.

[Example 2]
Referring to FIG. 6, the illustrated aquarium 200 is filled with water, and ornamental fish and the like are bred. An air filter device 1 as a cooling device is attached to the side wall 201 of the water tank 200, and a tube 202 is attached to the proximal end side of the air filter device 1. The inner diameter of the tube 202 gradually decreases as the distance from the air filter device 1 increases, and the blowout hole 202a defined on the free end side thereof is disposed so as to face the water surface obliquely.

  With this configuration, the air sent out from the air filter device 1 is discharged toward the water surface from the air outlet 202a of the tube 202, and the water temperature can be lowered by the vaporization heat effect. Therefore, when the water temperature rises above the appropriate temperature in summer or the like, the water temperature can be lowered by driving the air filter device 1. Moreover, since the inner diameter of the tube 202 is configured to gradually decrease toward the free end side, the cooling effect can be improved by the nozzle effect. In addition, it has confirmed that the water temperature cooling effect of 3 to 4 degreeC was acquired by experiment by this inventor.

  In the example of FIG. 6, the air filter device 1 is arranged vertically so that the distal end side is the upper side and the proximal end side is the lower side, but the air filter device 1 can also be arranged horizontally. In this case, unlike the example of FIG. 6, the intake opening 32 faces sideways. For example, dust or the like enters the air filter device 1 from the intake opening 32 when the air filter device 1 is not operating. Can be prevented.

2ND EMBODIMENT Next, the dust collector which concerns on 2nd Embodiment of this invention is demonstrated. In addition, the substantially same member as 1st Embodiment mentioned above is attached | subjected the same reference number, and the description is abbreviate | omitted.

  Referring to FIG. 7, the illustrated dust collection device 300 includes an air filter device 1 and a cover member 5 that is detachably attached to the distal end side of the air filter device 1.

  The cover member 5 is configured as a cap having a circular cross section, and is formed of a transparent material such as polycarbonate. In the predetermined direction X, a housing opening 51 is defined on the proximal end side of the cover member 5, and a circular intake opening 52 is formed on the distal end side thereof. A cylindrical portion 53 is provided at the peripheral edge of the intake opening 52, and the cylindrical portion 53 extends toward the base end side (inward) of the cover member 5, and its axial direction is relative to the axial direction of the rotary shaft 24. It is slightly inclined with a predetermined angle α. An opening 54 is defined on the base end side of the cylindrical portion 53 (the fan 2 side, the right side in FIG. 7).

  When the cover member 5 configured in this way is attached to the air filter device 1, the distal end side of the air filter device 1 is housed inside the cover member 5 via the housing opening 51, and the proximal end side end surface of the cover member 5 55 is positioned in contact with the front end surface 21 a of the housing 21. On the other hand, the intake opening 32 provided in the air filter device 1 functions as the accommodation opening 32, and the tubular portion 53 extends through the accommodation opening 32 to the inside of the hood cover 3. Communicate the space with the outside. Further, a dust collection space S3 is defined between the cover member 5 and the air filter device 1, and the dust collection space S3 communicates with the communication opening 33. In a state where the cover member 5 is mounted on the air filter device 1, the opening 54 defined on the proximal end side of the cylindrical portion 53 in the predetermined direction X is on the distal side with respect to the distal end of the swirl flow forming auxiliary projection 4. In the present embodiment, the housing 21 and the cover member 5 constitute a casing that faces the impeller 22 in the axial direction of the rotary shaft 24.

  In the dust collector 300 configured as described above, when the fan 2 operates and the impeller 22 rotates in a predetermined direction, air is introduced into the hood cover 3 through the cylindrical portion 53. The dust D contained in the air thus introduced is centrifuged by the swirl flow F2 due to the forced vortex as in the first embodiment, and is discharged to the outside of the hood cover 3 through the communication opening 33 by the flow vortex flow F3. And collected in the dust collection space S3. On the other hand, the clean air from which the dust D has been removed in this way is sent to the downstream side through the fan 2.

  Here, in this embodiment, since the cylindrical part 53 is provided, the separated flow area S can be formed more efficiently. Further, since the axial direction of the cylindrical portion 53 is slightly inclined with respect to the axial direction of the rotating shaft 24, air introduced from the central region of the intake opening 54 (cylindrical portion 53) is formed. The flow draws a curve. In this curve, the laminar flow flowing through the central portion is disturbed to form a turbulent flow region, so even the dust D contained in the laminar flow can be centrifuged radially outward.

  When the operation of the fan 2 is stopped, the centrifugally separated dust D accumulates in the dust collection space S3. Thus, the dust D collected in the dust collection space S3 can be removed by removing the cover member 5 from the hood cover 3. Since a gap G is formed between the cylindrical portion 53 and the peripheral edge of the opening 32, the cylindrical portion 53 is supported by the opening 32 only by pulling the air filter device 1 from the cover member 5. And both can be separated. Moreover, since the cover member 5 is formed of a transparent material, the dust D accumulated in the dust collection space S can be confirmed from the outside.

  The air filter device 1 configured as described above can be used alone as an air cleaner, or can be used as a cleaner by connecting an intake pipe (not shown) to the cylindrical portion 53. Further, similarly to the air filter device 1 described above, the cooling device can be used by being mounted on an electronic device or the like.

  In the present embodiment, the cylindrical portion 53 is configured such that the axial direction of the cylindrical portion 53 is inclined with respect to the predetermined direction X, that is, the axial direction of the rotary shaft 24. It may be parallel to the axial direction. Even in such a configuration, if the center position of the intake opening 52 is deviated from the extension line A of the axis of the rotary shaft 24, the axis of the cylindrical portion 53 and the axis of the rotary shaft 24 do not coincide with each other. Therefore, the flow of air introduced through the central region of the cylindrical portion 53 draws a curve, and the dust D contained in the air thus introduced is also centrifuged by the forced vortex swirl F2 as described above. .

[Third Embodiment]
Next, an air filter device according to a third embodiment of the present invention will be described. In the present embodiment, components that are substantially the same as those in the first embodiment described above are assigned the same reference numerals, and descriptions thereof are omitted.

  Referring to FIG. 8, the illustrated air filter device 1 </ b> A has substantially the same configuration as the above-described air filter device 1, but the air filter device 1 </ b> A includes a fan 2 </ b> A instead of the fan 2 and the swirl flow forming auxiliary unit 4. It is different in point. The fan 2 </ b> A includes a housing 21, an impeller 22 </ b> A that is rotatably supported by the housing 21, and a drive motor 23 that rotationally drives the impeller 22 </ b> A. The impeller 22 </ b> A includes a rotating shaft 24 and a plurality of blades 25 </ b> A extending radially outward from the rotating shaft 24. Each blade 25 </ b> A is formed in a flat plate shape, and is attached to the rotary shaft 24 so that the wide surface thereof is parallel to the axial direction of the rotary shaft 24.

  In the air filter device 1A configured as described above, when the drive motor 23 is driven to rotate and the impeller 22A rotates in a predetermined direction, as shown in FIG. 8B, a part of the rotational kinetic energy of the impeller 22A. Becomes a source of external kinetic energy of forced vortex generation, and a swirl flow F2 due to forced vortex flowing from the intake opening 32 toward the impeller 22A is formed inside the hood cover 3, and an intake opening in the separation flow area S A gas circulation vortex flow F3 flowing toward the portion 32 is formed. Further, a part of the air introduced from the intake opening 32 is discharged to the outside from the exhaust opening 26 due to the inertia effect, and the remaining part of the air introduced from the intake opening 32 to the outside from the communication opening 33. Discharged.

  Therefore, as described above, the dust D that has entered the inside of the hood cover 3 together with the air from the intake opening 32 flows along the spiral trajectory by the swirl flow F2 while flowing from the intake opening 32 toward the fan 2A. Centrifugalally outward, flows through the inner peripheral area of the hood cover 3 in a predetermined direction by a circulating vortex flow F3, flows toward the tip, and is discharged to the outside through the communication opening 33. On the other hand, the clean air from which the dust D is removed as described above is sent to the outside from the exhaust opening 26.

  Further, in the present embodiment, the blade 25A is formed in a flat plate shape, and the wide surface thereof is provided so as to extend in parallel with the axial direction of the rotary shaft 24. Therefore, a forced vortex can be generated more efficiently. This can improve the centrifugal separation effect.

  1 A of air filter apparatuses comprised in this way can be connected and used for the intake device for supplying air to the engine mounted, for example in a motor vehicle or a motorcycle. Hereinafter, a third embodiment in which the air filter device 1A is connected to an intake device will be described.

[Example 3]
Here, first, an intake device to which the air filter device 1A is connected will be described. Referring to FIG. 9 (a), an illustrated intake apparatus 6 supplies air to an engine (not shown), and includes an intake duct 61 that is an intake port for air and an air filter that purifies the air. A filter box 63 that accommodates 62, a throttle bubble (not shown) that adjusts the amount of air, and an intake manifold 64 that divides the air for each cylinder. In such a configuration, when the engine is started, air is sucked from the intake duct 61 due to the negative suction pressure of the engine, and the air thus sucked passes through the air filter 62 and the throttle bubble, and passes through the intake manifold 64 to the engine. It is sent to a cylinder head (not shown).

  Referring also to FIG. 9B, in the air filter device 1A configured as described above, the air discharged from the exhaust opening 26 (see FIG. 8B) is supplied to the intake device 6. Further, it is connected to the upstream end of the intake device 6, that is, the intake port 61 a of the intake duct 61 through the hollow connection member 7. In addition, a lead wire (not shown) extending from the drive motor 23 of the air filter device 1A is electrically connected to an accessory terminal (not shown) provided on the automobile body or the like.

  When the engine is started in such a configuration, electric power is supplied from the accessory terminal to the drive motor 23, whereby the drive motor 23 is rotationally driven, and the blade 25A is rotated in a predetermined direction together with the rotary shaft 24. Then, as described above, external air flows into the inside of the hood cover 3 from the intake opening 32 due to the inertia effect, and at the same time, air is also introduced into the hood cover 3 from the intake opening 32 due to the negative pressure suction effect of the engine. Inhaled. As described above, the swirl flow F2 due to the forced vortex is formed inside the hood cover 3 by the rotation of the blade 25A, and the circulation vortex flow F3 is formed due to the structure of the expansion tube. D is discharged to the outside through the communication opening 33 of the hood cover 3. On the other hand, the clean air from which the dust D has been removed as described above is sent from the exhaust opening 26 to the intake duct 61 through the connection member 7, passes through the air filter 62 and the throttle bubble, and passes from the manifold 64 to the engine. Sent to the cylinder head.

  In this way, by installing the air filter device 1A at the upstream end of the intake device 6, clean air from which dust D has been removed in advance can be supplied to the intake device 6. Clogging can be prevented. Moreover, since the dust D removed by the air filter device 1A is discharged to the outside from the communication opening 33, the air filter device 1A itself does not clog. Therefore, an increase in air resistance due to clogging of the air filter 62 or the air filter device 1A can be avoided, and as a result, a decrease in combustion efficiency of the engine due to the increase in air resistance can be prevented.

  Further, since air is discharged from the exhaust opening 26 of the air filter device 1A not only by the intake effect of the engine but also by the inertia effect obtained by the rotation of the fan 2A, the air filter device 1A functions as a supercharger. The engine intake can be increased.

  In the present embodiment, the air filter device 1A is mounted on the intake port 61a of the intake duct 61. However, in the case of an intake device that does not have the intake duct 61, the intake port of the filter box 63 that houses the air filter 62 is used. The air filter device 1A may be attached to 63a.

  In the above embodiment, the housing 21 and the connection member 7 of the air filter device 1A are separate members, but the housing 21 and the connection member 7 may be integrated. In the above embodiment, the housing 21 and the upstream end (intake port) of the intake device 6 are connected via the connecting member 7. However, the housing 21 and the upstream end (intake port) of the intake device 6 are directly connected. You may connect.

[Fourth Embodiment]
Next, a dust collector according to a fourth embodiment of the present invention will be described. In the present embodiment, components that are substantially the same as those in the first to third embodiments described above are given the same reference numerals, and descriptions thereof are omitted. Referring to FIG. 10, the illustrated dust collection device 400 includes an air filter device 1B and a dust collection container 8 that is detachably attached to the air filter device 1B. The air filter device 1B has substantially the same configuration as the air filter device 1 shown in FIG. 1, but the air filter device 1B has a plurality of blades 25A extending radially outward from the swirl flow forming auxiliary projection 4. And different from the air filter device 1. Each blade 25 </ b> A is formed in a flat plate shape, and is attached to the swirl flow forming auxiliary protrusion 4 so that the wide surface thereof is parallel to the axial direction of the rotating shaft 24. On the other hand, the dust collection container 8 is detachably attached to the hood cover 3 so that the internal space thereof communicates with the communication opening 33 of the air filter device 1B.

  In the dust collector 400 configured as described above, when the fan 2 operates and the impeller 22 rotates in a predetermined direction, air is introduced into the hood cover 3 through the intake opening 32. As in the first embodiment, the dust D contained in the air thus introduced is centrifuged by the swirling flow F2 (see FIG. 1) due to the forced vortex, and the hood through the communication opening 33 by the circulating vortex flow F3. It is discharged to the outside of the cover 3 and collected in the dust container 8. On the other hand, the clean air from which the dust D has been removed in this way is sent to the downstream side through the fan 2.

  Here, in this embodiment, since the blade 25A is provided in addition to the swirl flow forming auxiliary protrusion 4, the forced vortex can be formed more efficiently, and the dust D can be more efficiently centrifuged. be able to.

  When the operation of the fan 2 is stopped, the centrifugally separated dust D is accumulated in the dust collecting container 8. The dust D collected in the dust collection container 8 in this way can be removed by removing the dust collection container 8 from the hood cover 3. If the dust collection container 8 is formed of a transparent material, the dust collected in the dust collection container 8 and the dust D can be confirmed from the outside.

  The dust collector 400 configured as described above can be applied to an air cleaner or a vacuum cleaner, and can also be used by being mounted on an electronic device or the like as a cooling device in the same manner as the air filter device 1 described above. Hereinafter, Examples 4 and 5 when the dust collector 400 is applied to an air cleaner and a cleaner will be described in order.

[Example 4]
Referring to FIG. 11, the illustrated air cleaner 500 includes a dust collector 400 and a housing 501 that houses the dust collector 400. The air filter device 1B provided in the dust collector 400 is disposed inside the housing 501 so that the axial direction thereof is the vertical direction, the intake opening 32 is located on the lower side, and the exhaust opening 26 is located on the upper side. Yes. On the other hand, the dust collection container 8 is detachably accommodated in the casing 501, and in the example shown in FIG. 11, the dust collection container 8 can be pulled out from the side of the casing 501.

  The casing 501 is formed in a box shape, and an upper surface 501a is formed with an exhaust port 502 including a plurality of slits corresponding to the exhaust opening 26 of the air filter device 1B. Further, an intake port 503 communicating with the intake opening 32 of the air filter device 1B is formed on the lower surface 501b of the housing 501, and the intake port 503 and the intake opening 32 are connected by an intake pipe 504. The lower surface 501b of the housing 501 is provided with a plurality of legs 505, which are formed between the lower surface 501b of the air cleaner 500 and the floor surface on which the air cleaner 500 is placed, and thus on the lower surface 501b. A predetermined gap is secured between the intake port 503 and the floor surface.

  When the fan 2 operates in the air purifier 500 configured as described above, external air is introduced into the hood cover 3 via the intake port 503, the intake pipe 504, and the intake opening 32, and thus introduced. As described above, the dust D contained in the air is centrifuged by the swirling flow F2 due to the forced vortex, and collected in the dust collecting container 8 through the communication opening 33 by the circulating vortex flow F3. On the other hand, the clean air from which the dust D has been removed in this way is sent to the downstream side (upward in FIG. 11) through the fan 2 and discharged from the exhaust port 502 provided in the housing 501.

  Here, the centrifugal force of the swirling flow F <b> 2 applied to the dust D inside the hood cover 3 is inversely proportional to the weight of the dust D. Therefore, by arranging the air filter device 1B so that the intake opening 32 is positioned downward and the exhaust opening 26 is positioned upward as in the present embodiment, the return flow flowing downward in the circulation flow F3. Gravitational force is applied to the dust, and even relatively heavy dust D can be guided to the communication opening 33 side relatively easily, and dust collection efficiency can be improved.

[Example 5]
Referring to FIG. 12, the illustrated cleaner 600 includes a dust collector 400, a housing 601 to which the dust collector 400 is detachably mounted, and an intake air connected to the intake opening 32 of the dust collector 400. A pipe 602. An opening 601a is provided on the front end side of the housing 601, and the housing 21 of the air filter device 1B is fitted into the opening 601a. In addition, an exhaust port 603 formed by a plurality of slits is provided on the base end side of the housing 601, and a grip portion 604 is provided on the upper base end side of the housing 601.

  The intake pipe 602 is provided at the peripheral edge of the intake opening 32 so as to extend from the intake opening 32 to the outside of the hood cover 3. The intake pipe 602 may be slightly inclined with respect to the axial direction of the rotary shaft 24 of the intake fan 2 or the axial direction of the rotary shaft 24 in the same manner as the cylindrical portion 52 (FIG. 7) described above. And parallel to each other. In the present embodiment, in the state where the dust collector 400 is attached to the housing 601, the center position C of the intake opening 32 is biased downward from the rotation axis of the fan 2, and the axial direction of the intake pipe 602 is It is configured to incline downward from the intake opening 32 toward the outside.

  When the fan 2 operates in the vacuum cleaner 600 configured in this way, external air is introduced into the hood cover 3 through the intake pipe 602 and the intake opening 32, and is included in the introduced air. As described above, the dust D is centrifuged by the swirling flow F2 by the forced vortex and collected in the dust collecting container 8 through the communication opening 33 by the circulating vortex flow F3. On the other hand, the clean air from which the dust D is removed in this way is sent to the downstream side through the fan 2 and is discharged from the exhaust port 603 provided in the housing 601.

  As mentioned above, although the air filter apparatus and dust collector which concern on embodiment of this invention were demonstrated with reference to attached drawing, this invention is not limited to this embodiment, A various thing without deviating from the scope of the present invention. Deformation or correction is possible.

  For example, in each of the above-described embodiments, the swirl flow forming auxiliary protrusion 4 and / or the blade 25A are used. However, the swirl flow forming auxiliary protrusion 4 and / or the blade 25A may be omitted. Without using the swirl flow forming auxiliary protrusion 4 and / or the blade 25A, the swirl flow F2 of the forced vortex as described above can be formed by the rotation of the fans 2 and 2A, and the swirl flow F2 is centrifuged. The dust D can be discharged to the outside through the circulation vortex flow F3.

  1 and 7 may be provided with a blade 25A, and the air filter device 1A shown in FIG. 8 may be provided with a blade 25 as shown in FIG.

  In the above embodiment, a plurality of blades 25A formed in a substantially rectangular shape are used. However, the present invention is not limited to this, and the blade 25A has, for example, a triangular shape as shown in FIG. (Blade 25A ′) or a bowl shape (blade 25A ″) as shown in FIG. 13B. The number of blades 25A need not be plural, for example, FIG. Only one may be provided as shown in FIG.

  In each embodiment, as shown in FIG. 14, a cylindrical portion 36 may be provided on the peripheral edge portion of the intake opening 32 of the hood cover 3. The tubular portion 36 extends to the proximal end side (inward of the hood cover 3), and the opening 37 defined on the proximal end side of the tubular portion 36 in the predetermined direction X is on the distal end side with respect to the fan 2 (2A). And facing the impeller 22 (22A) of the fan 2 (2A) in the predetermined direction X. The axial direction B of the cylindrical portion 36 may be slightly inclined with respect to the axial direction of the rotating shaft 24 or may be parallel. By providing such a cylindrical part 36, the separation region S can be formed more efficiently.

  In the above embodiment, an axial fan is used as the fan 2, but a centrifugal fan may be used instead. In this case, the cross-sectional area of the cylindrical region R is equal to the cross-sectional area of the centrifugal fan.

  Furthermore, a filter can be provided in the air filter device 1, 1A, 1B. The filter can be installed at the downstream side of the blade 25, the downstream side of the blade 25A, or between the blade 25 and the blade 25A. By providing the filter in this way, it is possible to prevent insects and the like from entering, and the filter functions as a rectifier.

  The air filter device and the dust collector according to the present invention can be applied to the above-described cooling device, vacuum cleaner, and air cleaner, and can also be applied to a blower, a ventilation fan, a fan, and the like.

1, 1A, 1B Air filter device 2, 2A Fan 3 Hood cover 6 Intake device 21 Housing 23 Motor 24 Rotating shaft 26 Exhaust opening 25, 25A Blade 32 Intake opening 33 Communication opening 400 Dust collector 500 Air cleaner F2 Forced vortex swirl flow F3 Circulating vortex flow R Cylindrical region S Separated flow region

Claims (7)

A fan for generating an airflow, and a casing for housing the fan,
An intake opening is formed on the front end side of the casing in the first predetermined direction,
The fan is disposed on a base end side of the casing in the first predetermined direction;
When the fan rotates in the second predetermined direction, the rotation of the fan forms a swirling flow of forced vortex flowing from the intake opening toward the fan, and the intake opening in the inner peripheral region of the casing A flow of a circulating vortex that flows toward the side is formed outside the swirling flow, and dust contained in the air introduced into the casing through the intake opening is centrifuged radially outward by the swirling flow. After being separated, the flow of the circulating vortex flows the inner peripheral region of the casing toward the intake opening,
A center position of the intake opening is deviated from an extension line of the rotation axis of the fan, the intake opening is located in a predetermined cylindrical area coaxial with the rotation axis of the fan, and the predetermined cylindrical area is the fan have a radius of gyration of the same radius,
The air filter device , wherein the intake opening portion is provided in place of an opening portion having an opening center on an extension line of a rotation axis of the fan . The cylindrical portion is provided on the periphery of the front Symbol intake opening,
The fan includes a motors, and a impeller that is rotated by the motor,
Dust contained in air introduced into the casing through the front Symbol cylindrical portion and the air intake opening, of the casing by the flow of the circulating vortex after being centrifuged radially outward by the swirling flow The peripheral area flows to the intake opening side,
An axial direction of the cylindrical portion is inclined with respect to an axial direction of a rotation axis of the fan, and the intake opening portion faces the impeller in the first predetermined direction. An air filter device, and a cover member attached to the air filter device, a dust collection space is defined between the air filter device and the cover member,
  The air filter device includes a fan for generating an airflow, and a casing for housing the fan,
  A housing opening and a communication opening are formed on the front end side of the casing in the first predetermined direction,
  The fan is disposed on a base end side of the casing in the first predetermined direction;
  The dust collection space communicates with the communication opening;
  An intake opening is formed on the distal end side of the cover member, and a cylindrical portion extending toward a proximal end side of the cover member is provided on a peripheral portion of the intake opening, and the cylindrical portion includes the accommodation opening. Inserted and extended to the inside of the casing,
  The dust collecting container, wherein an axial direction of the cylindrical portion is inclined with respect to an axial direction of a rotation axis of the fan. The dust container according to claim 3, wherein a gap is provided between the cylindrical portion and the peripheral edge of the accommodation opening. When the fan rotates in the second predetermined direction, a rotating flow of forced vortex flowing from the cylindrical portion toward the fan is formed by the rotation of the fan, and the housing opening side in the inner peripheral region of the casing The flow of the circulating vortex is formed, and the dust contained in the air introduced into the casing through the cylindrical portion is centrifuged radially outward by the swirling flow, and then the flow of the circulating vortex The dust collection container according to claim 3 or 4, wherein the dust collection container collects dust in the dust collection space through the communication opening. An air filter device that prevents dust from entering an intake device connected to an engine,
A casing connected to the intake port of the intake device, and a fan accommodated in the casing,
An intake opening is formed on the front end side of the casing in the first predetermined direction,
The fan is disposed on the base end side of the casing in the first predetermined direction, and includes a motor and an impeller that is rotationally driven by the motor.
The impeller includes a rotation shaft that is rotationally driven by the motor, and a blade attached to the rotation shaft, and an axial direction of the rotation shaft is substantially parallel to the first predetermined direction, and the blade Is formed in a flat plate shape having a wide surface substantially parallel to the axial direction of the rotating shaft,
When the engine is driven and the fan rotates in a second predetermined direction, external air is introduced into the casing through the intake opening due to the intake effect of the engine, and the rotation of the fan causes the A swirling flow of forced vortex flowing from the intake opening toward the fan is formed, and a circulation vortex flow flowing toward the intake opening in the inner peripheral region of the casing is formed outside the swirling flow. ,
Dust contained in the air introduced into the casing through the intake opening is centrifugally separated radially outward by the swirling flow, and then the inner peripheral area of the casing is opened in the intake opening by the flow of the circulating vortex. Flowing to the side ,
A center position of the intake opening is deviated from an extension line of the rotation axis of the fan, the intake opening is located in a predetermined cylindrical area coaxial with the rotation axis of the fan, and the predetermined cylindrical area is the fan of having a turning radius and the same radius, the intake opening, an air filter device characterized that you have provided instead of the opening having an opening centered on the extension of the axis of rotation of the fan. An intake device that supplies air to an engine,
An air intake apparatus comprising: the air filter apparatus according to claim 6; a filter box connected to a downstream side of the air filter apparatus; and an intake manifold connected to a downstream side of the filter box.

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