JP2009018220A - Dedusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that the centrifugal force is not enough as a force for shaking off dust of a filter, so that unremoved dust remains in the filter, resulting in frequent occurrence of clogging, and air flow path is complicated, resulting in high pressure loss as a dedusting device, in a conventional dedusting device using a filter clogging removing means by centrifugal force. <P>SOLUTION: As shown in Fig.3, the filter 7 is provided with a centrifugal air blowing blade 8 and the filter 7 is cleaned with a straight brush 23 while generating air flow from the inside toward the outside, so as to increase the force for shaking off dust, thereby making frequency of clogging low. A roughly conical configuration of the filter 7 results in reduction in the pressure loss in the air flow path. The dedusting device 1 has an inspection door 5 on the lower face of a casing 3 connected to the intermediate part of the duct 2, so that maintenance work from the inside of a chamber is made easy. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dust removing apparatus mainly using a filter.

  In a ventilation unit that sucks outside air in a house, office, factory, etc. and introduces it indoors, a dust removal device that uses a filter is installed to collect and remove dust and dust floating in the outside air. There is something that has been.

  Conventionally, dust removal devices used in this type of ventilation unit are clogged when dust such as sand or dust adheres to the filter and accumulates, causing a reduction in ventilation airflow. Maintenance work such as replacement is frequently required. In order to simplify this maintenance work and lengthen the filter replacement cycle, a method using centrifugal force is known as a means for removing filter clogging (see, for example, Patent Document 1).

Hereinafter, the removal method will be described with reference to the dust removing device of FIG. The dust removing apparatus 101 in FIG. 7 is internally mounted in a casing 107 having a suction port 105 and a discharge port 106, with a filter unit 102 having a filter provided on a substantially cylindrical outer peripheral surface and a motor 103 coupled to each other by a coupling 104. Since the discharge port 106 is connected to the inside of the filter unit 102 and is connected to the casing 107 by a bearing 108, the filter unit 102 is rotatable. When collecting the dust in the airflow, the airflow including the dust flowing in from the suction port 105 is allowed to flow from the outside to the inside of the filter unit 102, whereby the dust is collected on the outer peripheral surface of the filter unit 102 and purified. The discharged gas flows out from the discharge port 106. And when clogging of a filter is removed, the dust adhering to an outer peripheral surface is wiped off by rotating the filter unit 102 and utilizing a centrifugal force.
Japanese Patent Application Laid-Open No. 11-057365

  In such a conventional dust removing device using the filter clogging removing means by centrifugal force, the force for removing dust from the filter is weak only by centrifugal force, and the dust remains on the filter without being completely removed. Further, when a laminated material is used for the filter, the dust once removed is reattached to the filter and the residual amount increases, and the frequency of occurrence of clogging of the filter increases. In addition, there are problems that the air path through which the airflow passes is complicated, pressure loss as a dust removing device is high, and maintenance work is difficult.

  The present invention solves such a conventional problem, can reduce the frequency of clogging of the filter by reducing the residue of dust on the filter, and can reduce the pressure loss of the air passage through which the airflow passes, An object of the present invention is to provide a dust removing device that facilitates maintenance work from the room.

  The dust removing device of the present invention includes a filter formed in a cylinder for collecting dust, a rotating means for rotating the filter, and a rotating means for rotating the filter in a box-shaped casing connected to the middle of a duct through which an airflow passes. It is composed of a fixing means for fixing in the body, and a partition member that guides the airflow in the housing to the filter to form an air passage, and a plurality of centrifugal fan blades are equally arranged in the cylinder of the filter, The upstream axial end face of the filter is closed, the downstream axial end face is opened, the outer diameter of the downstream axial end face is equal to or greater than the outer diameter of the upstream axial end face, and the air flow is within the duct. When passing through, the airflow flows from the outside to the inside of the filter to collect floating dust and dust, and to remove the clogging of the filter, rotate the filter and the centrifugal fan blade to rotate the centrifugal force. At the same time Is obtained is characterized by generating an air flow to the outside from the side. By this means, in addition to the centrifugal force, air flow is generated from the inside to the outside of the filter by the centrifugal air blowing blade, and the drag force acts on the dust, so that the force to wipe off the dust is increased and at the same time the air flow passes through the filter gap. Since it becomes difficult for dust to reattach, it is possible to reduce the frequency of clogging of the filter by reducing the amount of dust remaining on the filter. Moreover, since the downstream axial end surface is larger than the outer diameter of the upstream axial end surface, the airflow flowing from the duct into the housing becomes smooth, and pressure loss can be reduced.

  Moreover, since the rectification | straightening member is attached to the upstream axial direction end surface of a filter, generation | occurrence | production of a vortex is suppressed by rectifying | straightening the inside of a duct, Therefore A pressure loss can be reduced.

  In addition, since the filter forms a conical surface and the apex side of the cone is the upstream side, the airflow flowing into the duct can be made smooth while increasing the area of the filter, so that the pressure loss can be reduced.

  In addition, since the size of the casing in the direction perpendicular to the duct axis is larger than the duct diameter, the outer diameter of the filter can be made larger than the duct diameter, and the area of the filter increases and the amount of dust retained Therefore, the occurrence frequency of clogging can be reduced.

  Further, by providing a shielding means for shielding the gap between the outer periphery of the downstream axial end face of the filter and the partition member, the air can flow through the filter without leaking air, thereby improving the dust collection rate.

  In addition, since the labyrinth structure is used as the shielding means, it can be easily realized as the shielding means by processing the axial end surface on the downstream side of the filter and the fixing means without adding expensive parts such as conventional bearings. Can be shielded.

  In addition, by using a brush formed in a cylinder as the shielding means, complicated processing to parts and highly accurate axis alignment are unnecessary, and the shielding means can be easily realized.

  Further, the partition member is extended so as to cover the filter in the axial direction of the filter cylinder, and the tongue of the centrifugal fan is formed at a position facing the filter cylinder of the extended partition member, so that the centrifugal fan blade rotates. As the airflow generated increases, the power to remove dust increases.

  In addition, the partition member is extended in the axial direction of the filter cylinder until it covers the filter, and vibration is applied to the filter by providing a vibration means for applying vibration to the filter at a position facing the filter cylinder of the extended partition member. In addition, the force to remove dust together with the centrifugal force and drag becomes stronger.

  Further, the partition member is extended in the axial direction of the filter cylinder until it covers the filter, and by providing a sweeping means for slidingly contacting the filter at a position facing the filter cylinder of the extended partition member, dust on the filter surface is removed. The effect of wiping off directly is added, and the force to wipe off dust is increased in combination with centrifugal force and drag force.

  In addition, by providing a dust collection box vertically below the position opposite to the filter cylinder of the partition member, dust removed by the rotation of the filter can be collected in one place, so that the inside of the housing is not soiled, Further, since dust does not rise, reattachment to the filter can be suppressed.

  In addition, by arranging the tongue from the dust collection box in the rotation direction of the filter and the vibration means in the reverse rotation direction, when the air flow generated by the centrifugal blade is large, the filter is vibrated and the amount of dust that is removed is increased. To do. Further, since the tongue portion blocks the air passage as the centrifugal blower, the dust that has been wiped off collides with the tongue portion and falls downward. Since there is a dust collection box below, the dust collection rate can be increased.

  In addition, the vibration means is composed of a spring material having elastic restoring force and a plurality of protrusions provided on the outer peripheral surface of the filter, and when the filter rotates, the protrusion and the spring material repeatedly collide to generate vibration. As a result, the rotation of the filter can be used as an excitation source, and therefore it is not necessary to provide a separate excitation force for exciting the filter.

  In addition, by arranging the tongue from the dust collection box in the rotation direction of the filter and the sweeping means in the reverse rotation direction, the dust is removed by adding the action of sweeping the filter when the air flow generated by the centrifugal blades is large. The amount increases. Further, since the tongue portion blocks the air passage as the centrifugal blower, the dust that has been wiped off collides with the tongue portion and falls downward. Since there is a dust collection box below, the dust collection rate can be increased.

  Further, the sweeping means is a linear brush, the linear brush is arranged in the duct axial direction, and the brush tip is slidably contacted with the filter, so that the load caused by the sliding contact when the filter is rotated is reduced. Since it can be made small, the power consumption of the clogging removal operation can be reduced.

  Further, since the dust collection box can be separated from the partition member, only the accumulated dust can be taken out and discarded.

  In addition, by placing a high-performance filter with better dust removal efficiency than the filter on the downstream side of the filter, only fine dust that has passed through the first-stage filter will adhere to the high-performance filter, resulting in clogging. The frequency can be kept low, and the maintenance work can be reduced while improving the dust removal efficiency of the entire dust remover.

  Further, by providing an inspection door on the lower surface of the casing, it is possible to easily perform internal inspection and maintenance work while the casing is connected to the duct.

  In addition, the partition member is attached to the fixing means, and by removing the fixing means from the housing, it can be pulled out downward from the inspection door of the housing, so that the filter and the rotating device can be replaced at hand. The maintenance work efficiency can be improved.

  In addition, the clogging removal operation performed by rotating the filter is performed by detecting the absence of airflow in the duct, so that the user can check the filter's eyes during daily operation without being aware of maintenance. Since it is possible to remove clogging and the removal operation is performed each time, dust adhesion to the filter can be minimized.

  Further, when a certain time has elapsed since the previous filter clogging removal operation, the filter clogging removal operation is performed, so that the user can periodically remove clogging of the filter without being aware of maintenance.

  In addition, when a certain amount of time has elapsed after the air flow in the duct has elapsed, filter clogging removal operation is performed to effectively remove clogging of the filter without the user being aware of maintenance. can do.

  In addition, the filter clogging removal operation is performed when the clogged state of the filter is detected and the clogged state exceeds a certain level, so that the user can efficiently remove the filter without being aware of maintenance. Clogging can be removed. Since the clogging state is detected, the removal operation is not performed unnecessarily, so that the power consumption required for the removal can be minimized.

  According to the present invention, a cylindrical or conical filter is provided with a centrifugal blower blade and rotated, and in addition to centrifugal force, an air flow is generated from the inside to the outside of the filter, and a drag acts on the dust. At the same time, the force of removing the dust becomes stronger, and the airflow through the filter gap makes it difficult for the dust to re-adhere. Therefore, it is possible to reduce the residual dust on the filter and reduce the frequency of clogging of the filter. Also, the filter is formed in a cone and the inspection door is provided on the lower surface of the housing connected to the middle of the duct, so that the pressure loss in the air passage through which the airflow passes can be reduced, and the dust removal that simplifies maintenance work from the room. An apparatus can be provided.

  A dust removing device according to claim 1 of the present invention is a box-shaped housing connected to the middle of a duct through which an air flow passes, a filter formed in a cylinder for collecting dust, a rotating means for rotating the filter, The rotating means is configured by a fixing means for fixing the rotating means in the casing, and a partition member for guiding an air flow in the casing to the filter to form an air passage, and a plurality of centrifugal fan blades are provided in the cylinder of the filter. Evenly arranged, the upstream axial end face of the filter is closed, the downstream axial end face is open, and the outer diameter of the downstream axial end face is equal to or greater than the outer diameter of the upstream axial end face When the airflow passes through the duct, the airflow flows from the outside to the inside of the filter, collects floating dust and dust, and removes the clogging of the filter. Rotate It is characterized by generating airflow from the inside to the outside at the same time as centrifugal force. In addition to centrifugal force, airflow is generated from the inside to the outside of the filter by the centrifugal blower blades, and drag acts on the dust. At the same time, the force of removing the dust becomes strong, and the airflow passes through the filter gap, making it difficult for the dust to reattach. Therefore, it is possible to reduce the frequency of clogging of the filter by reducing the amount of dust remaining on the filter. Further, since the downstream axial end surface is larger than the outer diameter of the upstream axial end surface, the airflow flowing from the duct into the housing is smooth, and the pressure loss can be reduced.

  The dust removing device according to claim 2 of the present invention is the dust removing device according to claim 1, wherein a rectifying member is attached to the upstream axial end face of the filter, whereby the inside of the duct is rectified to generate vortex. Therefore, the pressure loss can be reduced.

  The dust removing device according to claim 3 of the present invention is the dust removing device according to claim 1, wherein the filter forms a conical surface and the apex side of the cone is the upstream side, thereby increasing the area of the filter. Since the airflow flowing in can be made smooth, the pressure loss can be reduced.

  The dust removing device according to claim 4 of the present invention is the dust removing device according to any one of claims 1 to 3, wherein the outer diameter of the filter is increased by the size of the housing in the direction perpendicular to the duct axis being larger than the duct diameter. Since it can be made larger than the duct diameter, the area of the filter is increased and the amount of dust retained is increased, so that the frequency of clogging can be reduced.

  The dust removing device according to claim 5 of the present invention is the dust removing device according to any one of claims 1 to 4, wherein a shielding means for shielding a gap between the outer periphery of the downstream axial end surface of the filter and the partition member is provided. In addition, since it is allowed to flow through the filter without leaking airflow, it has an effect that the dust collection rate can be improved.

  The dust removing device according to claim 6 of the present invention is a dust removing device according to claim 5, wherein a labyrinth structure is used as the shielding means, so that the filter downstream axial end surface and the fixing means are simply shielded. This can be realized as a means and can be shielded without adding expensive parts such as conventional bearings.

  The dust removing device according to claim 7 of the present invention is the dust removing device according to claim 4 or 5, wherein a brush formed in a cylinder is used as a shielding means, so that complicated machining of parts and high-precision centering are performed. Is not required and can be easily realized as a shielding means.

  The dust removing device according to claim 8 of the present invention is the dust removing device according to any one of claims 1 to 7, wherein the partition member is extended so as to cover the filter in the axial direction of the filter cylinder, and the filter cylinder of the extended partition member is provided. Since the tongue of the centrifugal blower is formed at a position opposite to that of the centrifugal blower, the air flow generated by the rotation of the centrifugal blower blades increases, so that the force for removing dust becomes stronger.

  The dust removing device according to claim 9 of the present invention is the dust removing device according to any one of claims 1 to 8, wherein the partition member is extended until the partition member covers the filter in the axial direction of the filter cylinder, and the extended filter cylinder of the partition member is provided. Providing vibration means for applying vibration to the filter at the opposite position has the effect that vibration is applied to the filter, and the force for removing dust in combination with centrifugal force and drag force is increased.

  The dust removing apparatus according to claim 10 of the present invention is the dust removing apparatus according to any one of claims 1 to 8, wherein the partition member is extended until the partition member covers the filter in the filter cylinder axis direction, and the extended filter cylinder of the partition member is provided. By providing the sweeping means in sliding contact with the filter at the opposite position, an action of directly wiping off dust on the filter surface is added, and the action of removing dust in combination with centrifugal force and drag is increased.

  The dust removing device according to claim 11 of the present invention is the dust removing device according to any one of claims 1 to 10, wherein a dust collecting box is provided vertically below the position facing the filter cylinder of the partition member, thereby rotating the filter. The dust removed by the above can be collected in one place, so that the inside of the housing is not soiled, and the dust does not rise, so that reattachment to the filter can be suppressed.

  The dust removing device according to claim 12 of the present invention is the dust removing device according to claim 11, wherein the tongue is generated from the dust collection box in the rotation direction of the filter and the vibration means is disposed in the reverse rotation direction, whereby a centrifugal blade is generated. When the airflow to be generated is large, the filter is vibrated and the amount of dust removed increases. Further, since the tongue portion blocks the air passage as the centrifugal blower, the dust that has been wiped off collides with the tongue portion and falls downward. Since there is a dust collection box below, it has the effect of increasing the dust collection rate.

  The dust removing device according to claim 13 of the present invention is the dust removing device according to any one of claims 9, 11 or 12, wherein a plurality of vibration means are provided on a spring material having elastic restoring force and an outer peripheral surface of the filter. When the filter rotates, the protrusion and the spring material repeatedly collide to generate vibration, so that the rotation of the filter can be used as an excitation source. Therefore, there is an effect that it is not necessary to provide a separate vibration force.

  The dust removing device according to claim 14 of the present invention is the dust removing device according to claim 11, wherein the tongue is generated from the dust collection box in the rotational direction of the filter and the sweeping means is disposed in the reverse rotational direction, thereby generating a centrifugal blade. When the air flow is large, the effect of sweeping out the filter is added, and the amount of dust that is removed is increased. Further, since the tongue portion blocks the air passage as the centrifugal blower, the dust that has been wiped off collides with the tongue portion and falls downward. Since there is a dust collection box below, it has the effect of increasing the dust collection rate.

  The dust removing device according to claim 15 of the present invention is the dust removing device according to any one of claims 10, 11 or 14, wherein the sweeping means is a straight brush, the straight brush is arranged in the duct axial direction, and the bristles of the brush are arranged. Since the tip is in sliding contact with the filter evenly, the load due to sliding contact when the filter is rotated can be reduced, so that the power consumption of the clogging removal operation can be reduced.

  The dust removing device according to claim 16 of the present invention is the dust removing device according to any one of claims 10 to 15, wherein the dust collection box can be separated from the partition member, so that only the accumulated dust can be taken out and discarded. It has the effect of becoming.

  The dust removing device according to claim 17 of the present invention is the dust removing device according to any one of claims 1 to 16, wherein a high performance filter having better dust removal efficiency than the filter is disposed downstream of the filter. Since only fine dust that has passed through the first-stage filter adheres to the filter, the frequency of clogging can be kept low, and the dust removal efficiency of the entire dust removal device can be increased while maintenance work can be reduced. Have.

  The dust removing device according to claim 18 of the present invention is the dust removing device according to any one of claims 1 to 17, wherein an inspection door is provided on the lower surface of the housing so that the housing remains connected to the duct. It is possible to easily carry out inspection and maintenance work.

  The dust removing device according to claim 19 of the present invention is the dust removing device according to claim 18, wherein the partition member is attached to the fixing means, and the housing is inspected while being integrated by removing the fixing means from the housing. By pulling down from the door, it is possible to replace the filter and the rotating means at hand, thereby improving the maintenance work efficiency.

  The dust removing device according to claim 20 of the present invention is the dust removing device according to any one of claims 1 to 19, wherein the clogging removal operation performed by rotating the filter is performed by detecting that no airflow passes through the duct. , The user can remove the clogging of the filter during daily operation without being aware of maintenance, and the dust removal on the filter is minimized because the removal operation is performed each time. It has the effect of being able to.

  The dust removing device according to claim 21 of the present invention is the dust removing device according to claim 20, wherein when a certain time has elapsed from the previous filter clogging removal operation, the user performs maintenance by performing the filter clogging removal operation. Even if it is not conscious, it has the effect | action that the clogging of a filter can be removed regularly.

  The dust removing device according to claim 22 of the present invention is the dust removing device according to claim 20, wherein when the air flow passes through the duct and the fixed time has elapsed, a filter clogging removal operation is performed. The user can effectively remove the clogging of the filter without being aware of maintenance.

  The dust removing device according to claim 23 of the present invention is the dust removing device according to claim 20, wherein the filter clogging removal operation is performed when the filter clogged state is detected and the clogged state exceeds a certain level. Due to the feature, the user can efficiently remove the clogging of the filter without being aware of the maintenance. Since the clogging state is detected, the removal operation is not performed unnecessarily, so that power consumption necessary for removal can be minimized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 is a side sectional view of the first embodiment, FIG. 2 (a) is a side sectional view showing the dust collecting apparatus of the first embodiment of the present invention during dust collection, and FIG. 2 (b) is a diagram of the present invention. FIG. 3 is a side cross-sectional view illustrating the filter clogging removal operation of the first embodiment. As shown in FIG. 1, the dust removing device 1 is connected to the middle of a duct 2 through which airflow for ventilation is disposed on the back of the ceiling of the building. The box-shaped housing 3 is, for example, a welded structure of a plated steel plate, is connected to the duct 2 via an adapter 4, and an inspection door 5 is provided on the lower surface so that the entire surface can be opened. The inspection door 5 is closed in a state where an air current flows through the duct 2, and is opened and used for maintenance work such as inspection. The ceiling interior material 6 is also cut out and constructed so as not to obstruct the opening and closing of the inspection door 5. In addition, the dimensions of the casing 3 in the direction orthogonal to the duct axis, that is, the height direction and the width direction are larger than the inner diameter of the duct 2, for example, the height H = 250 mm and the width in the figure for the duct diameter Dd = 150 mm. Although not shown in FIG.

  A filter 7 is formed in a cylindrical shape inside the housing 3, and a plurality of centrifugal fan blades 8 are uniformly arranged in the cylinder. The centrifugal blower blades 8 have a sirocco fan blade shape and are arranged in such a direction that the wind flows from the inside to the outside of the cylinder when rotating to remove clogging of the filter 7. The centrifugal blower blade 8 may be a turbofan blade shape. If the upstream axial end face 9 of the filter 7 is closed and its diameter is D1, and the downstream axial end face 10 is open and its diameter is D2, the dimensions are, for example, D1 = 100 mm, D2 = 200 mm, and D2> D1 and The relationship is D2> Dd.

  A bowl-shaped rectifying cone 11 is attached to the upstream axial end face 9 of the filter 7 as a rectifying member. The filter 7 has a rotation center connected to an electric motor 12 that is a rotating means, and the electric motor 12 is fixed to the upper surface and side surfaces of the housing by means of a flange fitting 13 that is a fixing means. The orifice plate 14 serving as a partition member for guiding the airflow flowing into the housing from the upstream duct into the filter to form an air passage is made of, for example, a plated steel plate, and a hole 15 through which the airflow flowing through the filter 7 passes is formed in the housing 3. It is being fixed to the upper surface and side surface of this using a screw. Since a gap is generated between the inspection door 5 and the inspection door 5, the packing 16 is attached. The diameter of the hole 15 through which the airflow passes is set to be larger than the inner diameter of the centrifugal blowing blade 8 so that the airflow is smooth, and the end face thereof is provided with a curvature process 17.

  A brush 18 formed in a cylinder is attached to the downstream axial end face 10 of the filter 7 as shielding means for shielding a gap with the orifice plate 14. The brush 18 may be attached to the orifice plate 14 because it has the same action. The bristle material of the brush 18 is nylon and has a diameter of 0.3 mm. The bristle is thin and weak, and the planted with high density is excellent in shielding the gap, and the resistance load when the filter 7 rotates is reduced.

  In the above configuration, when an air flow containing dust flows into the housing 3 from the upstream side of the duct 2, the air flow flows from the outside to the inside of the filter 7 as shown in FIG. The airflow that has collected and purified by adhering to the filter 7 flows downstream. At this time, the outer diameter D2 of the downstream axial end face 10 is larger than the outer diameter D1 of the upstream axial end face 9 of the filter 7, and the rectification action of the rectifying cone 11 suppresses the generation of vortices in the housing 3 and the air flow. Since pressure becomes smooth, pressure loss can be reduced.

  Further, since D2 is larger than Dd, the area of the filter is increased and the amount of dust retained is increased, so that the occurrence frequency of clogging can be reduced. Next, when removing dust adhering to the filter 7 and removing the clogging, the motor 12 is driven to rotate the filter 7 when the airflow does not pass through the duct 2 as shown in FIG. If it is made, centrifugal force will generate | occur | produce and dust will fly to an outer peripheral side. In addition to the centrifugal force, the centrifugal air blowing blade 8 generates an air flow from the inside to the outside of the filter 7 and acts against the dust. Becomes difficult to reattach. As a result, the residual dust can be reduced and clogging of the filter 7 can be suppressed, so that the frequency of clogging can be reduced. The time for rotating the filter 7 is, for example, within 30 seconds to 3 minutes, and the dust adhering to the filter 7 can be removed within this time.

  In addition, as a control means for performing the filter clogging removal operation, the sensor 7 detects that no airflow passes through the housing 3 and drives the motor 12 to rotate the filter 7. As the sensor, for example, a hot-wire type wind sensor that detects the air volume in the housing 3 is used, but a capacitance type pressure sensor that detects a pressure difference may be used. With this control means, the user can remove the clogging of the filter 7 during daily operation without being aware of maintenance, and the dust adheres to the filter 7 to perform the removal operation each time. Can be minimized.

  Further, as a control means for performing another filter clogging removal operation, the filter 7 is rotated by driving the electric motor 12 when a predetermined time has elapsed from the previous filter clogging removal operation. In order to detect a certain time, for example, a timer counter is used. With this control means, the user can periodically remove clogging of the filter 7 without being aware of maintenance.

  In addition, as a control means for performing another filter clogging removal operation, the filter 7 is rotated by driving the electric motor 12 after a certain period of time has elapsed after the air flow in the duct 2 is accumulated. . In order to detect a certain time, for example, a timer counter and a wind speed sensor are used in combination. With this control means, the user can efficiently remove clogging of the filter 7 without being aware of maintenance.

  In addition, although it changes also with the air pollution degree of the area to install, fixed time is the time corresponding to 2 months which are the cleaning periods of the filter provided in the conventional dust removal apparatus, for example.

  Further, as a control means for performing another filter clogging removal operation, the filter 7 is rotated by driving the motor 12 when the clogged state of the filter 7 is detected and becomes clogged more than a certain level. is there.

  In order to detect the clogged state, for example, a method of measuring the light transmittance of the filter 7 by combining an LED and a photocoupler is used, but a method of detecting the differential pressure before and after the filter 7 may be used. With this control means, the user can efficiently remove clogging of the filter 7 without being aware of maintenance. Since the clogging state is detected, the removal operation is not performed unnecessarily, so that the power consumption required for the removal can be minimized. Although the setting of the clogging state varies depending on the connected air blowing means and the necessary air volume, for example, there is a state where the air volume is reduced to 80% with respect to the initial air volume.

(Embodiment 2)
The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 3 is a side sectional view of the second embodiment, and FIG. 4 is a front sectional view of the second embodiment. As shown in FIGS. 3 and 4, the filter 7 is formed in a conical shape, and a plurality of centrifugal air blowing blades 8 are evenly arranged in the cone. The flange fitting 13 is attached to the orifice plate 14 using screws, and is fixed to the upper surface and the side surface of the housing 3 by screws using the orifice plate. That is, when the orifice plate is removed from the housing, the filter 7 and the electric motor 12 can be taken out in an integrated state. A labyrinth structure 19 as a shielding means is provided between the outer periphery of the downstream axial end face 10 of the filter 7 and the orifice plate 14.

  The labyrinth structure 19 can easily realize a shielding means by processing the downstream axial end face 10 and the orifice plate 14 of the filter 7, so that cost can be reduced without adding expensive parts such as a bearing. . A high performance filter 20 is disposed downstream of the electric motor 12. The filter 7 is, for example, polypropylene or a metal net, and has a dust removal efficiency of 30% or more.

  The high-performance filter 20 is obtained, for example, by pleating a nonwoven fabric and has a dust removal efficiency of 60% or more. The filter 7 is laminated to improve dust removal efficiency. For example, the dust removal efficiency may be 50% or more. The lower surface side of the casing of the orifice plate 14 is extended in the casing to a position covering the filter 7 in the cylindrical axis direction of the filter 7, and a dust collection box 21 is provided. The dust collection box 21 is normally fixed to the orifice plate 14, but can be separated and taken out from the lower surface of the housing 3. Further, a linear brush 23 as a sweeping means for slidingly contacting the tongue portion 22 of the centrifugal blower and the filter 7 is provided at a position opposite to the filter 7 of the orifice plate 14, and from the dust collection box 21 to the rotation direction of the filter 7. A tongue brush 22 and a linear brush 23 are arranged in the reverse rotation direction.

  The tongue portion 22 is formed by bending a triangular plate-shaped material, and the gap between the tongue portion 22 and the filter is kept uniform. The straight brush 23 is arranged in the duct 2 axial direction, and the hair tip is in sliding contact with the filter 7 evenly. The hair material is nylon and has a diameter of 0.3 mm. The hair material that is thin and has a long bristle is excellent in the effect of removing dust, and the resistance load when the filter 7 rotates is also reduced. In the above configuration, when the air flow including dust flows from the duct 2 into the housing 3, the filter 7 is conical, so that the air flow in the duct 2 can be made smooth, and the area of the filter 7 increases. Not only can it be reduced, but the amount of dust retained will also increase, making it difficult to clog. The airflow flowing through the filter 7 collects dust and flows through the high performance filter 20 on the downstream side.

  As a result, since only the fine dust that could not be collected by the filter 7 is collected by the high-performance filter 20, it is possible to reduce the occurrence frequency of clogging while improving the dust collection efficiency as the dust removing device 1. . Next, when removing dust adhering to the filter 7 to remove clogging, when the motor 12 is driven and the filter 7 is rotated when the airflow does not pass through the duct 2, the centrifugal force is added to the centrifugal force. An air flow is generated from the inside to the outside of the filter 7 by the blowing blades 8, but the air flow is increased by the tongue 22. Furthermore, since the linear brush 23 wipes off dust adhering to the surface of the filter 7, the force for removing dust becomes strong. Dust removed by the straight brush 23 is accumulated in the dust collection box 21.

  Next, when the removed dust is accumulated in the dust collection box 21 and taken out to the outside, the inspection door 5 is opened, the dust collection box 21 is detached from the orifice plate 14, and the accumulated dust is discarded. At the same time, the high-performance filter 20 can be exchanged by pulling it vertically downward. Further, when the filter 7 and the electric motor 12 are inspected and exchanged for a long period of use, the screw that fixes the orifice plate 14 to the housing 3 is removed, and the integrated state is taken out of the housing. In addition, the inspection and replacement can be carried out at hand instead of at high places, which not only makes work easier, but also contributes to safety work.

(Embodiment 3)
The same parts as those in the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. 5 is a side sectional view of the third embodiment, and FIG. 6 is a front sectional view of the third embodiment. As shown in FIG. 5 and FIG. 6, the tongue 22 of the centrifugal blower and the spring material 24 having elastic restoring force as vibration means for applying vibration to the filter 7 are disposed at a position facing the filter 7 on the inner surface of the orifice plate 14. A plurality of protrusions 25 are provided on the outer peripheral surface of the filter 7. When the filter 7 rotates, vibration is generated by the collision of the spring material 24 and the protrusions 25.

As the spring material, for example, a thin plate of resin or metal having a thickness of about 0.3 mm to 0.5 mm is used. Rotational speed of the filter is, for example 1200Min ^-1 or more. In the above configuration, when the dust adhered to the filter 7 is removed and the clogging is removed, when the motor 12 is driven to rotate the filter 7 when the airflow does not pass through the duct 2, the centrifugal force is applied. The centrifugal air blowing blade 8 generates an air flow from the inside to the outside of the filter 7, but the tongue 22 increases the air flow. Further, the vibration applied to the filter 7 increases the force for removing dust. Since the rotation of the filter 7 is used as an excitation source, there is an advantage that it is not necessary to provide another power for exciting the filter 7.

  INDUSTRIAL APPLICABILITY The dust removal apparatus of the present invention is useful for collecting and purifying floating dust when supplying outdoor air for ventilation and air conditioning of buildings. Further, the present invention can be applied to an air conditioner or an air purifier that is used while circulating indoor air.

Side surface sectional drawing of the dust removal apparatus of Embodiment 1 of this invention Side cross-sectional view showing when dust is collected in the same airflow and filter clogging removal operation ((a) Side cross-sectional view showing when dust is collected in the same airflow, (b) Side cross-sectional view showing when the filter is clogged and removed (Figure) Side surface sectional drawing of the dust removal apparatus of Embodiment 2 of this invention Front sectional view of the dust remover Side surface sectional drawing of the dust remover of Embodiment 3 of this invention Front sectional view of the dust remover Sectional drawing which shows the filter unit of conventional invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust remover 2 Duct 3 Case 4 Adapter 5 Inspection door 6 Ceiling interior material 7 Filter 8 Centrifugal blower blade 9 Upstream axial end face 10 Downstream axial end face 11 Rectifier cone 12 Electric motor 13 Flange fitting 14 Orifice plate 15 Hole 16 Packing 17 Curvature Processing 18 Brush 19 Labyrinth Structure 20 High Performance Filter 21 Dust Collection Box 22 Tongue 23 Linear Brush 24 Spring Material 25 Protrusion

Claims (23)

A filter formed in a cylinder for collecting dust, a rotating means for rotating the filter, and a fixing means for fixing the rotating means in the casing in a box-shaped casing connected to the middle of the duct through which the airflow passes And a partition member that guides the airflow in the housing to the filter to form an air passage, and a plurality of centrifugal blades are uniformly disposed in the cylinder of the filter, and the upstream axial direction of the filter The end face is closed, the downstream axial end face is open, the outer diameter of the downstream axial end face is equal to or greater than the outer diameter of the upstream axial end face, and when the airflow passes through the duct, When airflow flows inward from the inside, collects floating dust, and removes the clogging of the filter, rotate the filter and the centrifugal fan blades to generate airflow from the inside to the outside simultaneously with the centrifugal force. Filtration apparatus for causing produced. The dust removing device according to claim 1, wherein a rectifying member is attached to the upstream axial end face of the filter. 2. The dust removing apparatus according to claim 1, wherein the filter forms a conical surface, and the apex side of the cone is the upstream side. The dust removing device according to any one of claims 1 to 3, wherein a dimension of the casing in a direction orthogonal to the duct axis is larger than a duct diameter. The dust removing device according to any one of claims 1 to 4, further comprising a shielding unit that shields a gap between an outer periphery of a downstream axial end face of the filter and the partition member. 6. The dust removing device according to claim 5, wherein a labyrinth structure is used as the shielding means. 6. The dust removing apparatus according to claim 5, wherein a brush formed in a cylinder is used as the shielding means. The partition member is extended so as to cover the filter in the axial direction of the filter cylinder, and the tongue portion of the centrifugal blower is formed at a position facing the filter cylinder of the extended partition member. A dust removing device according to claim 1. The partition member is extended in the axial direction of the filter cylinder until the filter is covered, and an excitation means for applying vibration to the filter is provided at a position facing the filter cylinder of the extended partition member. The dust removing device according to any one of 8. 9. The sweeping member that extends in the axial direction of the filter cylinder until the partition member covers the filter and that is in contact with the filter at a position facing the filter cylinder of the extended partition member is provided. The dust removal apparatus in any one of. The dust removing device according to claim 1 or 10, wherein a dust collection box is provided vertically below a position of the partition member facing the filter cylinder. 12. The dust removing device according to claim 11, wherein a tongue portion is arranged in the rotation direction of the filter from the dust collection box, and a vibration means is arranged in the reverse rotation direction. The excitation means is composed of a spring material having elastic restoring force and a plurality of protrusions provided on the outer peripheral surface of the filter, and when the filter rotates, vibration is generated by the collision between the protrusion and the spring material. The dust removing device according to claim 9, 11 or 12. 12. The dust removing device according to claim 11, wherein a tongue portion is disposed in the rotational direction of the filter from the dust collection box, and sweeping means is disposed in the reverse rotational direction. 15. The dust removing device according to claim 10, 11 or 14, wherein the sweeping means is a linear brush, the linear brush is arranged in the duct axial direction, and the brush tip is in sliding contact with the filter evenly. apparatus. 16. The dust removing device according to claim 11, wherein the dust collection box can be separated from the partition member. The dust removing device according to any one of claims 1 to 16, wherein a high performance filter having a dust removing efficiency higher than that of the filter is disposed downstream of the filter formed in the cylinder. The dust removing device according to any one of claims 1 to 17, wherein an inspection door is provided on a lower surface of the housing. 19. The dust removing device according to claim 18, wherein the partition member is attached to the fixing means, and can be pulled out downward from the inspection door of the casing while being integrated by removing the fixing means from the casing. The dust removal apparatus according to any one of claims 1 to 19, wherein the clogging removal operation performed by rotating the filter is performed by detecting that no airflow passes through the housing. 21. The dust removing device according to claim 20, wherein the filter clogging removal operation is performed after a predetermined time has elapsed since the previous filter clogging removal operation. 21. The dust removing device according to claim 20, wherein the filter clogging removing operation is performed when a certain time has elapsed after the time during which the airflow passes through the duct. 21. The dust removing apparatus according to claim 20, wherein when the clogged state of the filter is detected and the clogged state exceeds a certain level, a filter clogging removal operation is performed.

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