JP2023052954A - Cyclone separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress deterioration in separation performance of a cyclone separation device regardless of directions of natural wind, the cyclone separation device configured to efficiently discharge a foreign matter separated by the cyclone separation device from the device using natural wind.

SOLUTION: A discharge acceleration surface 10 is provided at a discharge port 12, and a lower shield plate 22, a turn plate 21 and an inflowing-airflow control plate 20 are provided from a through-hole 16 toward swirling airflow inside a separation chamber 15. The inflowing-airflow control plate 20 is formed into a plate body, arranged at an upper part of the discharge acceleration surface 10, which has a through-hole 16 side inclined downward when viewed from a front surface side of an enclosure. The turn plate 21 is formed into a plate body whose end part is protruded from the discharge acceleration surface 10 toward the separation chamber 15. The lower shield plate 22 is arranged to be positioned on a tangent line drawn from the end part to the discharge acceleration surface 10, on a surface perpendicular to a center shaft of a turning chamber 14. Thus, the cyclone separation device that can discharge a foreign matter by natural wind and allows for suppression of deterioration in separation performance regardless of directions of the natural wind can be obtained.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a cyclone separator that separates foreign matter contained in the air using centrifugal force.

Conventionally, this type of cyclone separator is attached to the air supply port of the outer wall of a house in order to separate insects and dust (hereafter referred to as "foreign matter") that are sucked in with the outside air when the outside air is taken into the room. are used.

For example, in Patent Document 1, in a house equipped with a ventilation device for supplying and exhausting air, a cyclone separating device is provided at an air supply opening for taking in outdoor air. As a result, the foreign matter contained in the air is separated by the cyclone separator, and the separated foreign matter is stored in the separation chamber provided therein to prevent the foreign matter from entering the ventilator.

Further, in Patent Document 2, in a house equipped with a ventilation device for supplying and exhausting air, a cyclone separating device is provided at an air supply opening for taking in outdoor air. A separation chamber for storing the separated foreign matter is also provided. The separation chamber has a structure that opens the lid using wind power, so that when the lid is opened by the wind generated in the natural world (hereinafter referred to as “natural wind”), the separated foreign matter is discharged to the outside. It's becoming

The configuration is such that a baffle plate that receives the force of the wind pressure is provided, and the baffle plate is configured to move like a pendulum with a fulcrum at the top so that the baffle plate can move like a pendulum with a certain amount of strong wind. The two lids provided in the separation chamber are alternately opened.

Japanese Unexamined Patent Application Publication No. 2007-98208 JP-A-2008-36579

In such a conventional cyclone separator, if foreign matter accumulates in the separation chamber as in Patent Document 1, it is necessary to periodically remove the accumulated matter for maintenance. In addition, as in Patent Document 2, if a wind receiving plate is provided to move like a pendulum by a certain amount of strong wind, the device becomes large and there are moving parts, so regular maintenance is required. rice field.

Therefore, it is proposed to suppress deterioration of the separation performance of the cyclone even if the direction of the natural wind changes while having a discharge structure that can efficiently discharge the foreign matter separated by the cyclone by the natural wind without requiring regular maintenance. An object of the present invention is to provide a cyclone separator having a structure capable of

In order to achieve this object, the cyclone separator according to the present invention includes an inlet for introducing air into the housing, a swirl flow generating means for generating a whirling air flow in the housing, and a rear side of the housing. an inner cylindrical tube that is provided and communicates with an outflow port that causes the air that has flowed in from the inflow port to flow out of the housing; a swirling chamber that communicates with the inflow port on the front side in the housing; a space-dividing plate that divides the space-dividing plate into a separation chamber; a through hole that is provided in the space-dividing plate and communicates the swirl chamber and the separation chamber; a discharge port that communicates the separation chamber with the outside of the housing via a downwardly inclined discharge promoting surface, and the foreign matter that has been separated into the separation chamber by the swirling airflow re-enters the swirling chamber through the through hole. and an inflow airflow control plate that suppresses the airflow from flowing through the airflow, thereby achieving the intended purpose.

According to the present invention, regardless of the direction of the natural wind, it is possible to efficiently discharge foreign matter to the outside of the housing without lowering the separation performance.

FIG. 2 is a perspective view of the cyclone separating device according to Embodiment 1 of the present invention, viewed from the diagonally lower front side. Same side sectional view Same front sectional view Enlarged view showing the main part of the same discharge part ((a) Enlarged view near the discharge part, (b) View showing the return plate)

A cyclone separator according to the present invention includes an inlet for introducing air into a housing, a swirling flow generating means for generating a swirling air flow, and an outlet provided on the rear surface of the housing for discharging the air to the outside of the housing. a separation chamber and a swirling chamber each formed by a space dividing plate that divides the inside of the housing into an outer peripheral side near the side surface of the housing and an inner peripheral side including the center of the housing; A cyclone separator having a through hole communicating between the separation chamber and the swirling chamber, and an outlet communicating between the inside of the separation chamber and the outside of the housing, wherein the outlet is located below the separation chamber in the direction of gravity. The separation chamber includes a lower shielding plate, a return plate, and an inflow control plate in the direction of the swirling airflow from the through hole, and the inflow control plate is The return plate is a plate that is arranged above the discharge-promoting surface and is inclined downward on the through hole side when viewed from the front side of the housing, and the return plate is a plate whose end protrudes from the discharge-promoting surface to the separation chamber. The lower shielding plate was arranged so as to be on the tangential line drawn from the end to the discharge promoting surface in the plane perpendicular to the central axis of the swirling chamber.

Thereby, the air flowing in from the outlet can be made to flow to the side opposite to the through hole by the inflow airflow control plate. In addition, when a natural wind blows from the side without through-holes to the side with through-holes when viewed from the front of the housing, the airflow flowing in from the discharge ports is the downstream side of the natural wind. Turn in the direction along the slope of the face. The airflow along the slope of the discharge-promoting surface becomes a flow toward the through-hole side, but the flow is blocked by the lower shielding plate.

In other words, in the separation chamber, the air that has flowed in from the discharge port can be made to flow easily in the direction opposite to the through hole, so that the re-scattering of foreign matter in the separation chamber can be suppressed and the dust in the separation chamber can be discharged in a timely manner. can be done.

In addition, in the cyclone separator according to the present invention, a gap is provided between the upper portion of the inflow airflow control plate and the space dividing plate so that the air in the separation chamber can pass through.

As a result, when the airflow flowing in from the outlet collides with the lower shielding plate and reverses its direction, the airflow passes through the gap between the inflow airflow control plate and the space dividing plate and is directed away from the through hole. Therefore, the re-entrainment phenomenon can be suppressed.

Moreover, the cyclone separator according to the present invention has an upper shielding plate in the upper space of the separation chamber.

The airflow that has flowed in from the discharge port once flows through the separation chamber space in a direction away from the through hole, but eventually reaches the through hole. Therefore, by installing the upper shielding plate, the momentum of the air flow is lost, so that the foreign matter does not rise to the upper part of the separation chamber, and only the air passes over the upper shielding plate and reaches the through hole, further suppressing the re-entrainment phenomenon. can do.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
The present embodiment will be described below based on an example in which the cyclone separator is applied as a vent hood.

A ventilation hood 1 shown in FIG. 1 is attached to an air supply opening provided on the outer wall of a house. It is provided on the outer wall of a house and attached to an air supply opening for taking in outdoor air into the house.

A device (not shown) for taking in outdoor air into the house comprises a blower (not shown) installed inside the house and a ventilation duct (not shown), and connects the blower and the ventilation hood 1. are doing. Thereby, the air that has passed through the ventilation port hood 1 can be introduced into the room.

A ventilation hood 1 is connected to a ventilation duct using an outflow pipe 2 and is installed so as to protrude from the outer wall of a house.

Next, the external configuration of the housing 5 of the vent hood 1 will be described.

A housing 5 of the vent hood 1 is composed of a cover 3 on the front side and a base plate 4 on the back side shown in FIG. A cover 3, which is a main part of the ventilation port hood 1, has a square box shape, closes the front side, and has four side faces opened as inlets 7 on the back side. The shape of the cover 3 is not limited to a rectangular box shape, but may be a rotating body shape formed by rotating around the central axis 6 and a cylindrical shape with a closed front side. Moreover, although the shape of the surface on the front side in FIG. 1 is flat, it may have a dome shape in which the central portion protrudes toward the front side.

The sides of the cover 3 are connected to the base plate 4 and form the appearance of a vent hood 1. - 特許庁

A plurality of fixed blades 8 arranged obliquely toward the central axis 6 are provided on the downstream side of the inlet 7 as swirl flow generating means for swirling the inflow air. The fixed blades 8 are arranged rotationally symmetrically with the central axis 6 as a reference at equal intervals. In addition, a net may be provided around the inlet 7 and the fixed blade 8 to prevent large insects and birds from entering the device.

The base plate 4 has a circular opening in its center, to which the outflow pipe 2 is connected. The air inside the cover 3 flows out from the outflow port 9 at one end of the outflow pipe 2 .

In a state in which the central shaft 6 is arranged substantially horizontally, the lower portion of the cover 3 is provided with a discharge portion 11 so as to protrude from the side surface. The ejection part 11 has an ejection promoting surface 10 having an inclination inside and outside.

The discharge-promoting surface 10 is two symmetrically arranged surfaces, and is connected to another two surfaces, forming a discharge port 12 at the bottom. 11. The discharge part 11 is positioned at the bottom of the cover 3 .

The discharge part 11 has a discharge promoting surface 10 inclined in a direction in which the cross-sectional area decreases toward the lower part, and has a discharge port 12 opened to communicate the inside and the outside of the ventilation port hood 1 at the tip part thereof. The discharge part 11 includes the discharge promoting surface 10 and the discharge port 12 . In the present embodiment, the cover 3 has a rectangular box shape and has a structure in which the discharge portion 11 protrudes from the side surface of the cover 3. When the lower side surface is inclined, the side surface of the cover 3 can be used as the discharge promoting surface 10 as it is.

Next, with reference to FIG. 2, the internal configuration of this device will be described.

In the state where the discharge part 11 is located at the lowest part of the cover 3, as shown in FIG. An inner cylindrical tube 19 is provided in the inner tube 19, and a space dividing plate 13 is provided to divide the space between the fixed blade 8 and the front side of the cover 3.

The space dividing plate 13 is inclined in the cover 3 so that the cross-sectional area widens toward the base plate 4 side, and has a truncated cone shape. It should be noted that it may have a cylindrical shape with a constant cross-sectional area.

The inner peripheral side (inside the space dividing plate 13) including the central portion of the cover 3 is a swirl chamber 14, and the outer peripheral side (surrounded by the space dividing plate 13 and the cover 3) near the side surface of the housing 5 inside the cover 3 is space) is the separation chamber 15 . A through hole 16 is provided in the space dividing plate 13 , and the swirl chamber 14 and the separation chamber 15 communicate with each other through the through hole 16 .

The through hole 16 is positioned on the space dividing plate 13 on the side of the bottom surface 17 of the swirling chamber, above the central axis 6 and on the side where the swirling direction of the airflow in the swirling chamber 14 is directed downward. Then, as shown in the cross-sectional view of FIG. 2, the opening of the through hole 16 is provided at a distance from the tip of the inner cylindrical tube 19 .

The space dividing plate 13 forms a swirl chamber bottom surface 17 on the front side of the ventilation port hood 1 within the cover 3, and the space dividing plate 13 and the swirl chamber bottom surface 17 are formed continuously. Note that the space dividing plate 13 may be extended to the inner surface of the cover 3 and the inner surface of the cover 3 may be used as the swirl chamber bottom surface 17 .

The space outside the space dividing plate 13 and surrounded by the cover 3 is the separation chamber 15. Since the bottom surface 17 of the swirl chamber is substantially in close contact with the cover 3, the separation chamber 15 is an annular space in which a cylindrical space goes around. It is a space of It should be noted that the space dividing plate must always be in the shape of a body of revolution regardless of the shape of the cover 3 .

The separation chamber 15 also has a surface formed on the front side of the cover 3 shown in FIG. The degree of close contact between the bottom surface 17 of the swirl chamber and the bottom surface 18 of the separation chamber is designed so that there is a slight gap between the bottom surface 17 of the swirl chamber and the inner surface of the front side of the cover 3 in terms of assembly accuracy.

In this way, the bottom surface 18 of the separation chamber and the bottom surface 17 of the swirl chamber can be formed substantially on the same plane, so that the thickness of the cyclone separation device in the direction of the central axis 6, that is, the vent hood 1 can be minimized. can be done.

The inner tube 19 protrudes from the central portion of the base plate 4 into the cover 3 , that is, toward the front side of the ventilation port hood 1 , and is arranged coaxially with the outlet port 9 . In this embodiment, the inner diameter of the inner cylindrical tube 19 is different from the inner diameter of the outflow tube 2 at the base plate 4 portion, and the inner diameter of the inner cylindrical tube 19 is smaller than the inner diameter of the outflow tube 2. can be the same size. Since the portion of the base plate 4 expands rapidly toward the outflow tube 2 side, if turbulence of the airflow is expected, the shape may be such that the expansion gradually expands.

Next, the internal structure of the separation chamber 15 will be described with reference to FIGS. 3 and 4. FIG. In this embodiment, the separation chamber 15 is provided with four members: an inflow control plate 20 , a return plate 21 , a lower shielding plate 22 and an upper shielding plate 23 . Starting from the through hole 16, the lower shielding plate 22, the return plate 21, the inflow airflow control plate 20, and the upper shielding plate 23 are arranged in this order in the direction in which the swirling air current flows in the swirling chamber.

An inflow airflow control plate 20 is provided above the outlet 12 . As shown in FIG. 4( a ), the inflow airflow control plate 20 is inclined across a vertical line 24 drawn directly upward from the center of the discharge port 12 , and further extends from the bottom surface of the separation chamber in the direction of the central axis 6 . It is a plate extruded until it collides with the surface forming 15 .

The incoming airflow control plate 20 has two ends. The two ends can be distinguished into an upper end 25 and a lower end 26 by the inclination of the inflow control plate 20 . The side close to the central axis 6 is arranged on the upper side and the side farther from the center axis 6 is arranged on the lower side, and the upper side in the circumferential direction is arranged in the direction away from the through hole 16 compared to the lower side. The end on the upper side is the upper end 25 and the end on the lower side is the lower end 26 . Furthermore, a gap is provided between the upper end 25 of the inflow airflow control plate and the space dividing plate 13 .

FIG. 4B is a diagram showing the return plate 21. As shown in FIG. The return plate 21 is a plate whose tip protrudes toward the vertical line 24 from the surface of the discharge-promoting surface 10 (or the surface adjacent to the discharge-promoting surface 10). The projecting tip of the return plate 21 is referred to as a tip end 27 .

The lower shielding plate 22 is a plate extending on a radius drawn from the central axis 6 . The lower shielding plate 22 is configured to be in contact with the space dividing plate 13 on the inner peripheral side and to have a gap on the outer peripheral side.

The discharge-promoting surface 10, the tip end 27 of the return plate 21, and the lower shielding plate 22 are related, and the tangent line drawn from the tip end 27 to the discharge-promoting surface 10 (dotted line in FIG. 4(a)) extends in the opposite direction. It is constructed so that a lower shielding plate 22 is present thereon.

3, the upper shielding plate 23 is positioned directly above the central shaft 6, and the inner peripheral side of the upper shielding plate 23 is space-divided. It is configured so that it is brought into contact with the plate 13 and a gap is formed on the outer peripheral side. The upper shielding plate 23 may be positioned anywhere above the separation chamber 15 and above the through hole 16 (inside the upper space).

In the above configuration, the flow of airflow and the separation mechanism will be described.

First, outdoor air containing foreign matter flows into the ventilation hood 1 from the inlet 7 shown in FIG. swirl. Here, the foreign matter moves toward the space dividing plate 13 due to the centrifugal force, and moves into the separation chamber 15 when passing through the vicinity of the through hole 16 . The air from which the foreign matter has been separated flows into the inner tubular tube 19 , passes through the outflow tube 2 , and flows out of the apparatus through the outflow port 9 .

The foreign matter moved to the separation chamber 15 is temporarily stored in the separation chamber 15 . Since the inside of the ventilation port hood 1 is set to a negative pressure by the blower, air also flows into the separation chamber 15 from the discharge port 12 . The inflowing air passes through the through hole 16 shown in FIG.

Next, a mechanism for discharging foreign substances in the separation chamber 15 will be described.

FIG. 3 is a sectional view of the ventilation hood 1 as seen from the front side. The white arrows in FIG. 3 represent the flow of the air current. As shown in FIG. 3, the air inside the separation chamber 15 is generally swirling air currents in the same direction as the inside of the swirling chamber 14 due to the influence of the swirling air currents inside the swirling chamber 14 (all air currents are in the same direction). Not necessarily). Therefore, the foreign matter in the separation chamber 15 also moves under the influence of the flow.

As shown in FIG. 3, the upper portion of the discharge portion 11 extends laterally with respect to the lower portion.

Foreign matter carried by the whirling airflow easily flows into the discharge section 11 . In addition, by providing a width in the direction of the central axis 6, the whirling airflow flowing in the separation chamber 15 crosses the discharging portion 11, and foreign matter that has moved can easily flow into the discharging portion 11. there is In addition, the length in the direction of the central axis 6 may be extended to the same length as the separation chamber 15 in the direction of the central axis 6 .

The discharge port 12 is located below the discharge portion 11 and has a rectangular shape elongated in the direction of the central axis 6 .

The elongated shape is to secure an area for easy evacuation without allowing large insects and birds to enter. Furthermore, the reason why the discharge port 12 is elongated in the direction of the central axis 6 is to enhance the discharge effect by the natural wind.

Since the inside of the cover 3 has a negative pressure, the airflow also flows in from the outlet 12 . Even if a foreign object tries to fall from the outlet 12 due to its weight, it is pushed back by the inflowing air current, so that the foreign object usually hardly goes out of the housing 5 from the outlet 12 .

However, when a natural wind (cross wind) blows near the discharge portion 11 outside the housing 5, the natural wind becomes a downward air flow due to the inclination of the discharge promoting surface 10. FIG. Foreign matter existing in the vicinity of the discharge port 12 in the housing 5 is pulled out of the housing 5 by being attracted by this airflow. In this way, the foreign matter temporarily stored in the separation chamber 15 is automatically discharged to the outside of the housing 5 each time the natural wind blows. Maintenance of the foreign matter becomes unnecessary.

Since the cyclone separator of this embodiment is installed as the ventilation hood 1 on the outer wall of the house, there is a wall on the back side of the device. Therefore, the natural wind is less likely to flow in the direction of the central axis 6 and more likely to flow along the outer wall of the house. That is, it often flows in a plane direction perpendicular to the central axis.

There are two discharge-promoting surfaces 10 on both sides of the discharge port 12, and they have a symmetrical structure. This is to obtain the same discharge promoting effect regardless of whether the natural wind blows from the left or right. It should be noted that although the discharge promoting surfaces 10 are required to have inclinations on both the left and right sides, the structure may not be strictly symmetrical, and the angles may be slightly different.

In the present embodiment, a smooth surface with gradually steep slopes like an upside-down Mt.

Next, the airflow inside the separation chamber 15 will be described in detail.

As described above, part of the swirling airflow flows into the separation chamber 15 through the through holes 16 provided in the space dividing plate 13 . Due to this effect, a whirling airflow is generated in the separation chamber 15 in the same direction as in the whirling chamber 14 . However, since the inside of the ventilation port hood 1 becomes negative pressure due to the blower downstream, an air flow also flows into the separation chamber 15 from the discharge port 12 at the same time. The direction of this airflow is the direction of the vertical line 24 . The air flows through the through holes 16 into the swirl chamber 14 .

The airflow that has flowed in from the discharge port 12 lifts up the foreign matter temporarily stored in the separation chamber 15,
A re-entrainment phenomenon may occur in which the particles pass through the through-hole 16 and scatter downstream from the outflow port 9 . By providing the inflow airflow control plate 20, this re-entrainment phenomenon can be prevented. By providing the inflow airflow control plate 20 so as to cover the upper part of the discharge port 12, the airflow flowing in from the discharge port 12 collides with the inflow airflow control plate 20 and moves away from the through hole 16 in the vicinity of the discharge promoting surface 10. You can direct the airflow to Therefore, the foreign matter rises up on the right side of the vertical line 24 in FIG. A decrease in performance can be suppressed.

At this time, with the vertical line 24 as a reference, there is a case where the particles that rise up on the side where the through hole 16 does not exist go further upward through the ring-shaped separation chamber 15 and toward the through hole 16 . In this case, by providing the upper shielding plate 23, the momentum of the whirling air current (indicated by the white arrow in FIG. 3) in the separation chamber 15 can be weakened, so that the re-entrainment phenomenon can be further suppressed.

Next, when natural wind blows outside the housing 5, the direction of the airflow flowing in from the discharge port 12 is affected by the natural wind and tilts in the same direction as the natural wind. In FIG. 3 , when the natural wind flows from left to right, the airflow flowing in from the discharge port 12 becomes an airflow inclined to the right along the slope of the discharge promoting surface 10 . In this case, although it does not collide with the inflow airflow control plate 20, there is no particular problem because it moves toward the side where the through hole 16 does not exist.

However, in FIG. 3, when the natural wind flows from the right to the left, the air current tilts to the left along the discharge promoting surface 10 . In this case as well, it does not collide with the inflow airflow control plate 20 . Therefore, by providing the return plate 21 and providing the lower shielding plate 22 on the line connecting the tangential line of the discharge promoting surface 10 and the tip end portion 27, the airflow flowing in from the discharge port 12 is tilted toward the through hole 16 side. Even if it faces in the direction of the dotted line in 4(a), it will collide with the lower shielding plate 22 . For this reason, even if a foreign object flies up, it collides with the lower shielding plate 22 and loses momentum, and does not go directly to the through hole 16, so that the re-scattering phenomenon can be suppressed. In the present embodiment, since a gap is provided on the upper end portion 25 side of the inflow airflow control plate 20, part of the airflow that collides with the lower shielding plate 22 is allowed to pass through to the side where the through hole 16 does not exist. can escape. In other words, it is possible to further reduce the airflow from the lower shielding plate 22 toward the through hole 16 side, and further suppress the re-entrainment phenomenon.

Since the ventilation hood 1 is installed on the wall surface of the house, the wall surface is on the back side in FIG. Conversely, a flow from the near side to the far side of the paper surface may occur. Since it exists lying in the direction of the central axis 6 inside 15, it collides with the inflow airflow control plate 20, and the re-entrainment phenomenon can be prevented. In other words, it is possible to suppress the occurrence of the re-scattering phenomenon regardless of which direction the natural wind blows.

As described above, in the present invention, the airflow flowing in from the discharge port 12 can be controlled without being influenced by the direction of the natural wind, and the re-entrainment phenomenon can be suppressed. It is possible to provide the ventilation hood 1 capable of efficiently discharging foreign matter using natural wind.

The cyclone separator according to the present invention can automatically discharge the separated foreign matter using natural wind, prevent re-entrainment regardless of the direction of the natural wind, and suppress deterioration of separation performance. Therefore, it is useful as a ventilation hood or the like used for an air supply opening on the outer wall of a house that takes in outdoor air for ventilation inside the house.

REFERENCE SIGNS LIST 1 vent hood 2 outflow pipe 3 cover 4 base plate 5 housing 6 center shaft 7 inflow port 8 fixed vane 9 outflow port 10 discharge promoting surface 11 discharge part 12 discharge port 13 space dividing plate 14 swirl chamber 15 separation chamber 16 through hole 17 Bottom surface of swirl chamber 18 Bottom surface of separation chamber 19 Inner tube 20 Inflow airflow control plate 21 Return plate 22 Lower shielding plate 23 Upper shielding plate 24 Vertical line 25 Upper end 26 Lower end 27 Tip end

Claims (6)

an inflow port for inflowing air into the housing;
a swirling flow generating means for generating a whirling airflow in the housing;
an inner cylindrical tube provided on the back side of the housing and communicating with an outlet for allowing the air that has flowed in from the inlet to flow out of the housing;
a space dividing plate that separates a swirl chamber communicating with the inflow port and a separation chamber positioned on the outer peripheral side of the swirl chamber on the front side in the housing;
a through hole provided in the space dividing plate and communicating between the swirl chamber and the separation chamber;
With the central axis of the housing arranged horizontally, the separation chamber and the outside of the housing are separated from each other through the downwardly inclined discharge promoting surface provided at a lower position in the separation chamber in the direction of gravity. a communicating outlet;
an inflow airflow control plate that suppresses foreign matter separated into the separation chamber by the whirling airflow from re-entering the whirling chamber through the through hole;
a cyclone separator. The inflow airflow control plate is a structure having a surface inclined downward in the gravitational direction on the side of the through hole when viewed from the front side of the housing. The cyclone separator according to claim 1, wherein the cyclone separator is installed so as to cover the top. 3. The cyclone separation according to claim 1, wherein a gap is provided above the inflow airflow control plate and the space dividing plate so that the air in the separation chamber can pass through. Device. 4. A return plate having an end projecting from the discharge promoting surface to the separating chamber is further provided on the surface of the discharging promoting surface facing the separating chamber. cyclone separator as described in . further comprising a lower shield plate provided upstream of the inflow airflow control plate between the through hole and the inflow airflow control plate in the direction of the swirling airflow;
The lower shielding plate is a plate extending on a radius drawn from the central axis of the housing, and the discharge from the end of the return plate on a plane perpendicular to the central axis of the housing. 5. A cyclonic separator according to claim 4, arranged in the lower space of said separation chamber on an extension of a tangent line drawn to the facilitating surface. further comprising an upper shield plate provided downstream of the inflow airflow control plate between the inflow airflow control plate and the through hole in the direction of the swirling airflow;
6. The cyclone separator according to claim 5, wherein the upper shielding plate is arranged in an upper space of the separation chamber above the central axis of the housing.

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