JP2010017675A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone type dust collector separating and removing dust in the atmosphere having both high dust collection performance and low pressure loss. <P>SOLUTION: Introduction of air into the cyclone type dust collector 1 causes a whirling flow in an annular chamber 2 to apply a centrifugal force to dust in the air. The centrifugal force separates and removes dust from the air to drop dust in a dust collection chamber 6 and deposit. The dust-removed air is sucked from the lower end of an inner cylinder 7 and discharged from a discharge port 8. Provision of a guide plate 10 along the outer periphery of a ventilation port 9 from a suction port 3 besides the configuration, mitigates collision of an inflow air stream from the suction port 3 with the whirling flow caused in the annular chamber 2 to reduce pressure loss. Thus, the dust collector having both high dust collection performance and low pressure loss can be provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dust collector that separates and removes dust contained mainly in the atmosphere.

  A conventional cyclone type dust collector sucks air containing dust and generates a swirling flow inside to centrifuge the dust. The airflow descends while turning inside the apparatus, reverses at the lower part of the apparatus, and flows out of the apparatus through the flow path inside the apparatus.

  Hereinafter, an example of a conventional cyclone dust collector will be described with reference to FIG.

  The dust collector 101 includes an outer cylinder 102, an intake port 103 connected in the tangential direction of the outer circumference circle, a conical cylinder 104 connected to the lower end of the outer cylinder 102, a dust collection chamber 105 connected to the lower end of the conical cylinder 104, an outer cylinder. An inner cylinder 106 and an exhaust port 107 are provided so as to penetrate the center of 102 in the axial direction. Air containing dust flows into the outer cylinder 102 from the air inlet 103, and centrifugal force is applied to the dust in the air when the air swirls within the outer cylinder 102, and the dust is attracted to the side wall inside the outer cylinder 102. The air containing dust further descends while turning around the inner wall surface of the conical cylinder 104, and drops the dust into the dust collection chamber 105. The air from which the dust has been removed is sucked up from the lower end of the inner cylinder 106 and discharged from the exhaust port 107.

There exists patent document 1 as what applied such a conventional cyclone type dust collector to a house.
JP 2005-127560 A

  In the conventional cyclone type dust collector, when the swirling downward flow is reversed and flows into the inner cylinder, a large deformation and contraction of the streamline accompanies, so a large pressure loss occurs here and the air flows. There existed the subject of giving a big burden to a ventilation means. Therefore, it is required to achieve both high dust collection performance and low pressure loss.

  The present invention solves such a conventional problem, and an object thereof is to provide a dust collector that achieves both high dust collection performance and low pressure loss.

  In order to achieve the above-described object, the present invention provides an air inlet connected to the annular chamber and a tangential direction of the outer periphery of the annular chamber, a vent on the bottom surface of the annular chamber, an outer cylinder connected to the vent, and the outer cylinder. A cyclone type dust collector comprising a conical cylinder connected to the lower side, a dust collecting chamber below the conical cylinder, an inner cylinder penetrating the center of the annular chamber in the axial direction of the outer cylinder, and an exhaust port connected to the inner cylinder In addition, a guide plate is provided from the air inlet to the vent so as to form an air passage from the air inlet in the annular chamber.

  With this configuration, it is possible to provide a dust collector that achieves both high dust collection performance and low pressure loss.

  According to the present invention, it is possible to provide a dust collector that achieves both high dust collection performance and low pressure loss.

  According to the first aspect of the present invention, there is provided an air inlet connected in a tangential direction between the annular chamber and the outer periphery of the annular chamber, a vent on the bottom surface of the annular chamber, an outer cylinder connected to the vent, and a lower portion of the outer cylinder A cyclone-type dust collector comprising a conical cylinder connected to the inner cylinder, a dust collecting chamber below the conical cylinder, an inner cylinder penetrating through the center of the annular chamber in the axial direction of the outer cylinder, and an exhaust port connected to the inner cylinder. The dust collector further comprises a guide plate from the air inlet to the vent so as to form an air passage from the air inlet in the annular chamber.

  By providing a guide plate of an appropriate length, the collision between the inflowing air flowing in from the air inlet and the swirling flow generated in the annular chamber is mitigated, and the pressure loss can be reduced. Further, when the length of the guide plate is increased, the flow area is reduced and the pressure loss is increased, but the flow velocity is increased and the dust collection performance can be enhanced.

  The invention according to claim 2 of the present invention is a cross-sectional view of the annular chamber cut along a plane perpendicular to the axial direction of the outer cylinder. The dust collector according to claim 1, wherein the dust collector is provided as a curved line.

  Thereby, the increase in pressure loss due to the collision between the swirling flow and the guide plate can be mitigated.

  According to the third aspect of the present invention, in the cross-sectional view of the annular chamber cut by a plane perpendicular to the axial direction of the outer cylinder, the center of the vent is the origin, and the angle formed by both ends of the guide plate is 90 ° or less. It is a dust collector of Claim 2 characterized by the above-mentioned.

  If the angle formed by both ends of the guide plate is extremely small, that is, if the guide plate is extremely short, the effect of reducing the collision between the inflowing airflow and the swirling flow cannot be sufficiently obtained, and the pressure loss cannot be reduced. On the other hand, if the angle formed by both ends of the guide plate is larger than 90 °, that is, if the guide plate is too long, the flow passage area becomes small and pressure loss increases. Therefore, in order to achieve both high dust collection performance and low pressure loss, the angle formed by both ends of the guide plate is preferably 90 ° or less, and more preferably in the range of 30 to 60 °.

  The invention according to claim 4 of the present invention is the dust collector according to any one of claims 1 to 3, wherein the outer peripheral radius of the annular chamber is continuously reduced to have a spiral shape. .

  Thereby, the flow velocity of the swirling flow generated in the annular chamber is increased, and the centrifugal force applied to the dust in the air can be increased to facilitate separation from the air.

  According to the fifth aspect of the present invention, the radius r of the outer periphery of the spiral shape of the annular chamber is such that r = r0 × (1−θ × tan (−α × π / 180) using the rate of change α and the maximum radius r0. The dust collecting device according to claim 4, wherein the dust collecting device decreases according to the formula of)).

  Thereby, the flow velocity of the swirling flow generated in the annular chamber can be increased, and the centrifugal force applied to the dust in the air can be increased to facilitate separation from the air.

  A sixth aspect of the present invention is the dust collector according to the fifth aspect, wherein the rate of change α is in the range of 5-8.

  Thereby, the flow velocity of the swirling flow generated in the annular chamber can be increased, and the centrifugal force applied to the dust in the air can be increased to facilitate separation from the air.

  The invention according to claim 7 of the present invention is characterized in that the bottom surface of the annular chamber is inclined inward and downward with respect to a surface perpendicular to the axial direction of the outer cylinder. It is a dust collector of description.

  Thereby, the resistance of the air flowing from the annular chamber to the outer cylinder can be reduced.

  The invention according to claim 8 of the present invention is the dust collector according to claim 7, wherein the joint portion between the bottom surface of the annular chamber and the outer cylinder is a curved surface.

  Thereby, the resistance of the air flowing from the annular chamber to the outer cylinder can be reduced.

  The invention according to claim 9 of the present invention is the dust collector according to any one of claims 1 to 8, wherein the ratio of the inner cylinder diameter to the outer cylinder diameter is 0.6 or more.

  Thereby, the pressure loss which arises when the air which fell to the conical cylinder from the outer cylinder reverses and raises the inner cylinder can be reduced.

  The invention according to claim 10 of the present invention is the dust collector according to any one of claims 1 to 9, wherein the inclination of the conical cylinder is 30 ° or less.

  Thereby, the resistance of the air descending the conical cylinder can be reduced.

  The invention according to claim 11 of the present invention is the dust collector according to any one of claims 1 to 10, wherein a flange whose outer diameter increases downward is provided at the lower end of the inner cylinder. .

  As a result, interference between the air descending from the outer cylinder to the conical cylinder and the air sucked up into the inner cylinder can be reduced.

  A twelfth aspect of the present invention is the dust collecting apparatus according to any one of the first to eleventh aspects, wherein an adhesive material is provided inside the dust collecting chamber.

  Thereby, it is possible to suppress the fine dust that has entered the dust collection chamber and return to the air sucked into the inner cylinder.

  A thirteenth aspect of the present invention is the dust collector according to any one of the first to twelfth aspects, wherein an insecticidal material is provided inside the dust collecting chamber.

  When the dust collector of the present invention is used in a state where the air inlet is open to the outdoors, small insects are captured together with dust and collected in the dust collecting chamber. At that time, if the insect remains alive, it may escape from the inner cylinder to the outside of the dust collector, for example, into the room. By providing an insecticidal material inside the dust collecting chamber, insects caught in the dust collecting chamber can be killed and entry into the room or the like can be prevented.

  A fourteenth aspect of the present invention is the dust collector according to any one of the first to thirteenth aspects, wherein antibacterial and antifungal processing is applied to the inside of the dust collecting chamber.

  If dust or insect carcasses accumulate in the dust collection chamber, mold may be generated, resulting in unsanitary conditions. By applying antibacterial and antifungal treatment inside the dust collection chamber, it is possible to delay the occurrence of mold and prevent unsanitary conditions.

  The invention according to claim 15 of the present invention is provided with a mechanism for automatically discharging the dust accumulated in the dust collecting chamber to the outside of the dust collecting apparatus. It is a dust collector.

  If dust or insect carcasses accumulate in the dust collection chamber, mold may be generated, resulting in unsanitary conditions. Further, when the amount of accumulated dust or the like increases, a part of the dust rises and is scattered by an air current and may be sucked up by the inner cylinder. A mechanism that automatically discharges dust accumulated in the dust collection chamber to the outside of the dust collector prevents large amounts of dust from accumulating in the dust collection chamber. It can be suppressed.

  According to a sixteenth aspect of the present invention, the dust collection chamber includes a dust collection plate in contact with a bottom surface of the dust collection chamber, and a dust discharge port that can be opened and closed on the bottom surface of the dust collection chamber. A mechanism is provided for periodically moving on the bottom surface of the dust collecting chamber to collect the dust in the vicinity of the waste discharge port, and opening the waste discharge port to discharge the waste outside the apparatus. Item 16. The dust collector according to Item 15.

  Thereby, the dust accumulated in the dust collecting chamber can be discharged periodically by a simple mechanism. In this case, it is preferable that the waste outlet is open to the outdoors.

  The invention according to claim 17 of the present invention is the dust collector according to any one of claims 1 to 16, further comprising a filter between the lower end of the inner cylinder and the exhaust port.

  Thereby, it is possible to collect fine dust, live insects, and the like that were not captured in the dust collection chamber, and prevent these from being discharged from the exhaust port and entering the interior of the chamber.

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

(Embodiment 1)
FIG. 1 is a perspective view of a dust collector according to Embodiment 1 of the present invention.

  The cyclone type dust collector 1 includes an annular chamber 2, an intake port 3 connected from the tangential direction of the annular chamber 2, an outer cylinder 4 connected to the bottom surface of the annular chamber 2, a conical cylinder 5 connected to the lower end of the outer cylinder 4, A dust collection chamber 6 connected to the lower end of the conical cylinder 5, an inner cylinder 7 that penetrates the center of the annular chamber 2 in the axial direction of the outer cylinder 4, and an exhaust port 8 connected to the inner cylinder 7 are configured.

  When air is introduced into the dust collector 1 by the blowing means, a swirling flow is generated in the annular chamber 2, and centrifugal force is applied to the dust in the air. Due to the centrifugal force, the dust moves toward the outer peripheral wall of the annular chamber 2 and enters the space between the outer cylinder 4 and the inner cylinder 7 from the annular chamber 2 while swirling with the air. Further, the dust falls while turning along the inner wall surface of the conical cylinder 5 and falls into the dust collecting chamber 6. The air from which the dust has been removed is sucked from the lower end of the inner cylinder 7 and discharged from the exhaust port 8.

  FIG. 2 is a cross-sectional view of the annular chamber 2 cut along a plane perpendicular to the axial direction of the outer cylinder 4.

A guide plate 10 is provided along the outer periphery of the air vent 9 from the air inlet 3. The length of the guide plate 10 is represented by an angle θ _G (°) between the center of the inner cylinder 7 and both ends of the guide plate 10.

By the guide plate 10, the collision between the inflow air flowing in from the intake port 3 and the swirl flow generated in the annular chamber 2 is alleviated, and the pressure loss can be reduced. Further, if the length of the guide plate 10 is increased (that is, θ _G is increased), the flow area is reduced and the pressure loss is increased, but the flow velocity is increased and the dust collection performance can be enhanced. The guide plate 10 may have any shape as long as it can relieve the collision between the inflowing airflow and the swirling flow and reduce the pressure loss, but as shown in FIG. Is preferable from the viewpoint of reducing pressure loss.

FIG. 3 is a graph showing the relationship between the dust collection efficiency and the pressure loss with respect to the guide plate length θ _G when the spiral radius change rate α is 6.5. FIG. 4 is a graph showing the relationship between the dust collection efficiency and the pressure loss with respect to the guide plate length θ _G when the spiral radius change rate α is 9.5. Note that the change rate α of the spiral radius is a constant representing the change rate of the spiral radius when the outer periphery of the annular chamber 2 draws a spiral whose radius changes at a constant rate.

As the guide plate length θ _G is increased, the dust collection efficiency is constant, but the pressure loss decreases, reaches a minimum value, and then increases rapidly. This is considered as follows. If θ _G is extremely small, that is, if the guide plate is extremely short, the effect of mitigating the collision between the incoming airflow and the swirling flow cannot be obtained sufficiently, and the pressure loss cannot be reduced. On the other hand, if θ _G is too large, that is, if the guide plate is too long, the flow path area becomes small, and the pressure loss increases. Further, since the swirling flow gradually descends along the outer periphery of the annular chamber 2, the pressure loss caused by the collision between the inflowing air flow and the swirling flow is gradually reduced with respect to the air flow direction. Therefore, even if the guide plate is made too long, the effect of reducing the pressure loss cannot be obtained. Although slightly different depending on the value of α, in order to achieve both high dust collection performance and low pressure loss, θ _G is preferably 90 ° or less, and more preferably 30 to 60 °. When measuring dust collection efficiency, 15 kinds of JIS Z8901 test powder 1 were used as simulated dust.

  FIG. 5 is a simplified view of the cross-sectional view of FIG.

  Since the radius r of the outer circumference of the annular chamber 2 is small so as to draw a spiral, when the air swirls in the annular chamber 2, the air gradually accelerates as it travels and is added to the dust in the air. Centrifugal force increases and separation of air and dust is promoted. On the other hand, when the radius of the spiral is reduced, the air resistance is increased and the pressure loss is increased. For example, a spiral shape in which the radius decreases discontinuously from the inlet 3 side of the annular chamber 2 to the half of the outer periphery in the direction of air flow such that r = r0 and the other half is r = 0.7 × r0. In this case, the sudden flow path change at the discontinuous point becomes a large air resistance, and the pressure loss increases. Therefore, if the outer peripheral radius of the annular chamber 2 is a spiral shape that decreases from the intake port 3 side at a constant rate in the air flow direction, the resistance generated between the outer peripheral wall of the annular chamber 2 and the air is the outer peripheral direction. It becomes uniform over the entire area, and an increase in pressure loss can be suppressed. When the rate of change of the spiral radius is a constant α, the radius r in FIG. 5 is r = r0 × (1−θ × tan (−α × π / 180) as a function of the central angle θ with respect to the maximum radius r0. ). In the formula, θ is an angle (radian), and π is a circumference.

  FIG. 6 is a graph showing the relationship between α and dust collection efficiency. When α is 5 to 8, the dust collection efficiency is high, and α = 6.5 is more preferable. When α is smaller than 5, a turbulent flow is generated at the place where the inflow air flow from the air inlet 3 and the swirl flow generated in the annular chamber 2 are joined, so that a sufficient centrifugal force cannot be applied to the dust. it is conceivable that. On the other hand, when α is larger than 8, the centrifugal force applied to the dust increases, and the dust goes around the annular chamber 2 and is mixed again with the dust in the air that enters from the air inlet 3. It is thought that efficiency becomes worse.

  Further, the bottom surface of the annular chamber 2 may be inclined inward and downward with respect to a surface perpendicular to the axial direction of the outer cylinder 4. Thereby, since the air which flows toward the outer cylinder 4 from the annular chamber 2 moves below gradually, the resistance of air can be suppressed and the pressure loss of a dust collector can be reduced. Moreover, it is good also considering the junction part of the bottom face of the annular chamber 2 and the outer cylinder 4 as a curved surface. As a result, air resistance can be further suppressed, and a reduction in pressure loss can be expected.

  FIG. 7 is a schematic cross-sectional view of the dust collector 1 of FIG. 1 cut in the axial direction of the outer cylinder 4. FIG. 8 is a graph showing the relationship between the dust collection efficiency and the pressure loss with respect to the ratio d2 / d1 between the outer cylinder diameter d1 and the inner cylinder diameter d2. As the value of d2 / d1 increases, the dust collection efficiency decreases slightly, but is almost constant. On the other hand, the pressure loss rapidly decreases and becomes almost constant at 0.6 or more. When the value of d2 / d1 is small, the space between the outer cylinder 4 and the inner cylinder 7 is large, so that the air descending to the conical cylinder 5 tends to flow, but the resistance when sucked into the inner cylinder 7 is increased. . Therefore, if the ratio d2 / d1 is 0.6 or more, both high dust collection performance and low pressure loss can be achieved. However, if the value of d2 gets too close to the value of d1, the resistance of air toward the conical cylinder 5 increases, so the ratio d2 / d1 is preferably 0.9 or less.

FIG. 9 is a graph showing the relationship between the dust collection efficiency and the pressure loss with respect to the inclination θ _C of the conical cylinder 5 in FIG. When θ _C is 30 ° or more, dust collection efficiency and pressure loss tend to deteriorate. The reason is not clear, but it is considered to be a harmful effect due to the sudden narrowing of the flow path. Therefore, the inclination θ _C of the conical cylinder 5 is preferably set to 30 ° or less.

  A flange whose outer diameter increases downward may be provided at the lower end of the inner cylinder 7. Thereby, interference between the air descending from the outer cylinder 4 to the conical cylinder 5 and the air sucked up to the inner cylinder 7 can be reduced.

  Further, an adhesive material may be provided inside the dust collection chamber 6. As a result, it is possible to suppress the fine dust that has entered the dust collection chamber 6 from being returned to the air sucked into the inner cylinder 7.

  Further, an insecticidal material may be provided inside the dust collection chamber 6. When the dust collector 1 is used in a state where the air inlet 3 is open to the outdoors, small insects are captured together with dust and collected in the dust collecting chamber 6. At that time, if the insect remains alive, it may escape from the inner cylinder 7 to the outside of the dust collector 1, for example, into the room. By providing the inside of the dust collection chamber 6 with an insecticidal material, insects caught in the dust collection chamber 6 can be killed and entry into the room or the like can be prevented.

  Further, the inside of the dust collecting chamber 6 may be subjected to antibacterial and antifungal processing. If dust or insect dead bodies accumulate in the dust collection chamber 6, mold or the like may be generated, resulting in unsanitary conditions. By applying antibacterial and antifungal treatment to the inside of the dust collecting chamber 6, it is possible to delay the occurrence of mold and prevent unsanitary conditions.

  Further, a mechanism for automatically discharging the dust accumulated in the dust collecting chamber 6 to the outside of the dust collecting device 1 may be provided. If dust or insect dead bodies accumulate in the dust collection chamber 6, mold or the like may be generated, resulting in unsanitary conditions. Further, when the amount of accumulated dust or the like increases, a part of the dust rises and is scattered by an air current and may be sucked up by the inner cylinder. By providing a mechanism for automatically discharging the dust accumulated in the dust collecting chamber 6 to the outside of the dust collecting device 1, it is possible to prevent a large amount of dust from accumulating in the dust collecting chamber 6. The inside can be prevented from becoming unsanitary.

  FIG. 10 is a schematic cross-sectional view in which the dust collecting chamber 6 in the case where a mechanism for automatically discharging dust is provided is cut horizontally. A dust collecting plate 11 is provided in contact with the bottom surface of the dust collecting chamber 6. The dust collecting plate 11 has an S-shaped shape in a cross-sectional view, and is fixed so that its center can be rotated. A dust discharge port 12 that can be opened and closed is provided on the bottom surface of the dust collection chamber 6. The dust collecting plate 11 periodically rotates around the fixed portion, collects dust accumulated in the dust collecting chamber 6, and at the same time, the dust discharge port 12 is opened and discharged out of the dust collecting device 1. The waste outlet 12 is preferably connected to the outdoors directly or via piping.

  A filter may be provided between the lower end of the inner cylinder 7 and the exhaust port 8. The position where the filter is provided may be an arbitrary position between the lower end of the inner cylinder 7 and the exhaust port 8. The filter may be, for example, a coarse knitted filter or a high performance filter such as a HEPA filter. Thereby, it is possible to collect fine dust, live insects, and the like that have not been captured in the dust collection chamber 6, and prevent them from being discharged from the exhaust port 8 and entering the room or the like.

  The dust collector of the present invention is useful because it collects dust in the air, purifies it, and supplies it to the room when taking outdoor air into the room for ventilation or air conditioning of the building. It can also be applied to air conditioners and air purifiers that are used while circulating indoor air.

The perspective view of the dust collector of Embodiment 1 of this invention Sectional drawing of the annular chamber of Embodiment 1 of this invention The graph which shows the relationship between dust collection efficiency and pressure loss with respect to length (theta) _G of the guide plate of Embodiment 1 of this invention ((alpha) = 6.5). The graph which shows the relationship between dust collection efficiency and pressure loss with respect to length (theta) _G of the guide plate of Embodiment 1 of this invention ((alpha) = 9.5). Schematic sectional view of the annular chamber of Embodiment 1 of the present invention The graph which shows the relationship between the change rate (alpha) of the spiral radius of Embodiment 1 of this invention, and dust collection efficiency Schematic sectional view of the dust collector of Embodiment 1 of the present invention The graph which shows the relationship between dust collection efficiency and pressure loss with respect to ratio d2 / d1 of the outer cylinder diameter and inner cylinder diameter of Embodiment 1 of this invention The graph which shows the relationship between dust collection efficiency with respect to inclination (theta) _C of the cone cylinder of Embodiment 1 of this invention, and pressure loss Schematic sectional view of the dust collection chamber of Embodiment 1 of the present invention A perspective view showing a conventional dust collector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collector 2 Annular chamber 3 Intake port 4 Outer cylinder 5 Conical cylinder 6 Dust collection chamber 7 Inner cylinder 8 Exhaust port 9 Vent 10 Guide plate 11 Dust collector 12 Waste discharge port 101 Dust collector 102 Outer cylinder 103 Inlet 104 Conical cylinder 105 Dust collection chamber 106 Inner cylinder 107 Exhaust port

Claims (17)

An air inlet connected to the annular chamber and the tangential direction of the outer periphery of the annular chamber, a vent on the bottom surface of the annular chamber, an outer cylinder connected to the vent, a conical cylinder connected to the lower side of the outer cylinder, a lower side of the conical cylinder A cyclone-type dust collector having a dust collection chamber, an inner cylinder that penetrates the center of the annular chamber in the axial direction of the outer cylinder, and an exhaust port connected to the inner cylinder, the interior of the annular chamber from the intake port A dust collector comprising a guide plate from the air inlet to the vent so as to form an air passage. In the cross-sectional view of the annular chamber cut along a plane perpendicular to the axial direction of the outer cylinder, a guide plate is provided as a curve from the intersection of the annular chamber and the intake port toward the outer periphery of the vent hole. Item 2. A dust collector according to Item 1. The cross-sectional view of the annular chamber cut along a plane perpendicular to the axial direction of the outer cylinder has an origin at the center of the vent and an angle between both ends of the guide plate is 90 ° or less. Dust collector. The dust collector according to any one of claims 1 to 3, wherein the outer peripheral radius of the annular chamber is continuously reduced to have a spiral shape. The radius r of the outer circumference of the spiral chamber of the annular chamber decreases according to the equation r = r0 × (1−θ × tan (−α × π / 180)) using the rate of change α and the maximum radius r0. The dust collector according to claim 4. 6. The dust collector according to claim 5, wherein the change rate α is in the range of 5-8. The dust collector according to any one of claims 1 to 6, wherein a bottom surface of the annular chamber is inclined inward and downward with respect to a surface perpendicular to the axial direction of the outer cylinder. The dust collector according to claim 7, wherein a joint portion between the bottom surface of the annular chamber and the outer cylinder is a curved surface. The dust collector according to any one of claims 1 to 8, wherein a ratio of an inner cylinder diameter to an outer cylinder diameter is 0.6 or more. The dust collector according to any one of claims 1 to 9, wherein the inclination of the conical cylinder is 30 ° or less. The dust collector according to any one of claims 1 to 10, wherein a flange whose outer diameter increases downward is provided at a lower end of the inner cylinder. The dust collector according to claim 1, wherein an adhesive material is provided inside the dust chamber. The dust collector according to any one of claims 1 to 12, wherein an insecticidal material is provided inside the dust chamber. The dust collector according to any one of claims 1 to 13, wherein the inside of the dust chamber is antibacterial and mildewproofed. The dust collector according to any one of claims 1 to 14, further comprising a mechanism for automatically discharging dust accumulated in the dust chamber to the outside of the dust collector. A dust collection plate in contact with the bottom surface of the dust collection chamber is provided inside the dust collection chamber, and a dust discharge port that can be opened and closed on the bottom surface of the dust collection chamber. The dust collection plate periodically covers the bottom surface of the dust collection chamber. 16. The dust collecting apparatus according to claim 15, further comprising a mechanism that moves and collects dust in the vicinity of the waste discharge port, and opens the waste discharge port to discharge the waste outside the device. The dust collector according to any one of claims 1 to 16, further comprising a filter between a lower end of the inner cylinder and an exhaust port.

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