JP2020146687A - Cyclone separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a deterioration of separation performance by suppressing a re-scattering phenomenon in a hood installed in a ventilation port for air supply. SOLUTION: A first intake port 4 having a plurality of fixed blades 3 on one end side of a cylindrical case 1 and an outlet 6 provided on one end surface of the case 1 on the same side as the fixed blades 3 are provided in the case 1. The other end side of the case 1 is provided with a second intake port 5 which can be positioned at the lowermost portion of the case 1 with the central axis 20 of the cylindrical case 1 arranged horizontally, and is provided with the first swivel chamber 8. The case 1 is provided with a space dividing plate 7 for dividing into a second swivel chamber 9, and the space dividing plate 7 is provided with a through hole 10 for communicating the first swivel chamber 8 and the second swivel chamber 9. In the first swivel chamber 8 at the end surface 1B of the above, a cylindrical member 11 having the same central axis 20 as the case 1 is provided, and in the direction of the central axis 20, the outflow side end surface 11A of the cylindrical member 11 is in the through hole 10. It was configured to be located. [Selection diagram] Fig. 2

Description

The present invention relates to a cyclone separating device that is attached to an air intake portion of an outdoor outer wall of a building to separate foreign matter contained in the outdoor air and returns it to the outside when the outdoor air is taken indoors in the building.

Conventionally, as a cyclone separating device of this kind, for example, the one of Patent Document 1 is known.

Hereinafter, the cyclone separation device will be described with reference to FIGS. 6 and 7.

As shown in FIGS. 6 and 7, a circular inflow port 102 in which a plurality of blades 101 are radially arranged with gaps at equal intervals on one end surface in the axial direction, and a circular inflow port 103 on the other end surface. The space between the inflow port 102 and the outflow port 103 is a cylindrical swirl chamber 104, and the air entering from the inflow port 102 becomes a swirling airflow by the blades 101, and then the airflow flows out from the outflow port 103. Below the swirl chamber 104, a separation chamber 105 is provided for accommodating foreign matter separated in the air by a swirling air flow. A through hole 106 for communicating the swivel chamber 104 and the separation chamber 105 is provided, and the foreign matter that has moved to the outer peripheral side in the swivel chamber 104 passes through the through hole 106 and moves to the separation chamber 105.

Japanese Unexamined Patent Publication No. 2008-36579

In such a conventional cyclone separation device, a part of the airflow flows into the separation chamber through the through hole due to the swirling airflow generated in the swirl chamber in the separation chamber. The inflowing air has returned to the swirl chamber, and the airflow in the separation chamber is turbulent. Therefore, the foreign matter that has once moved to the separation chamber may float in the separation chamber and move to the swivel chamber again, and the foreign matter that has re-inflowed into the swivel chamber flows out to the outlet as it is, which is a so-called re-scattering phenomenon. This has caused a problem that the separation performance is deteriorated.

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a cyclone separation device capable of suppressing a decrease in separation performance by suppressing a re-scattering phenomenon.

Then, in order to achieve this object, the cyclone separating device according to the present invention is provided so as to orbit the side surface on one end side of the case, and air is allowed to flow into the case to generate a swirling airflow in the case. It is provided on the mouth and the side surface on the other end side of the case, and is provided on the second intake port located at the lowermost part in the direction of gravity and one end surface on one end side of the case with the central axis of the case arranged horizontally. , A cylindrical outlet that allows the air that has flowed in from the first intake port to flow out of the case, a first swivel chamber that communicates with the first intake port in the case, and an outer peripheral side of the first swivel chamber. A space division plate that divides the space into a second swivel chamber that communicates with the second intake port, a through hole that is provided in the space division plate and penetrates the first swivel chamber and the second swivel chamber, and a through hole in the first swivel chamber. A cylindrical member provided on the other end side of the case is provided. The central axes of the outlet and the cylindrical member are arranged in the same manner as the central axis of the case, and when the cylindrical member is viewed from the side, the end surface of the cylindrical member on the outlet side is the central axis of the through hole. It is located in a range that overlaps with the through hole in the direction, thereby achieving the intended purpose.

According to the present invention, the foreign matter that has flowed in together with the air from the inflow port receives centrifugal force due to the swirling airflow in the first swirling chamber and moves from the through hole to the second swirling chamber. It is a separation room. Due to the blower located downstream of the outlet, air also flows in from the second intake port, and the air in the second swivel chamber tries to flow into the first swivel chamber, so it is centered from the second swivel chamber to the first swivel chamber. Although it moves in the axial direction, the moving foreign matter collides with the side surface of the cylindrical member due to inertial force, and the colliding foreign matter is swirled again by the swirling airflow in the first swivel chamber and flows into the second swivel chamber again from the through hole. Therefore, it is possible to suppress the scattering of foreign matter in the second swirl chamber downstream from the outlet, and it is possible to suppress the deterioration of the separation performance.

External perspective view of Embodiment 1 of the present invention Sectional view along the same central axis Sectional drawing along the central axis of Embodiment 2 of this invention Front view of the arc blade part Sectional drawing along the central axis of Embodiment 3 of this invention External perspective view of a conventional cyclone separator Sectional view along the same central axis

The cyclone separation device according to the present invention is formed by including a cylindrical case into which an air flow flows, an opening that is opened around a side surface on one end side of the case, and a plurality of fixed blades arranged along the opening. The first intake port is provided with an outlet on one end surface of the case on the same side as the fixed blade, and the airflow passing through the first intake port becomes an airflow having a swirling component by the fixed blade in the case. , And the airflow flows out of the case from the outlet, and the other end side of the case is located at the lowermost position on the side surface of the case with the central axis of the cylindrical case horizontally arranged. The space dividing plate is provided with a second intake port that can be made to be formed, and a space dividing plate that divides the inside of the case into a first turning chamber on the inner peripheral side and a second turning chamber on the outer peripheral side. In a cyclone separation device provided with a through hole for communicating the first swivel chamber and the second swivel chamber, a cylindrical member having the same central axis as the case is provided in the first swivel chamber on the other end side of the case. , The end face of the cylindrical member on the outlet side in the direction of the central axis has a configuration positioned within the range of the through hole.

As a result, the inside of the cylindrical case is divided into a first swivel chamber and a second swivel chamber by a space dividing plate, and the space dividing plate is provided with a through hole for communicating the first swivel chamber and the second swivel chamber. The outdoor air that enters from the intake port becomes a swirling airflow and flows into the first swirling chamber, where the foreign matter contained in the swirling airflow receives centrifugal force, orbits near the space dividing plate, and is the first through the through hole. Move to the second swivel chamber. That is, the second swivel chamber is a separation chamber that receives the separated foreign matter, and the foreign matter separated in the second swivel chamber is deposited near the lower part, that is, near the second intake port due to gravity. Furthermore, when a natural wind blows outside the device and a crosswind blows near the second swivel chamber, the static pressure drops according to Bernoulli's theorem, and when the static pressure outside the device is lower than that on the second swivel chamber side, foreign matter enters the device. It is discharged to the outside. By this action, the foreign matter separated in the second swivel chamber can be returned to the outside.

Further, the blower arranged on the downstream side of the device creates a negative pressure inside the device, and air also flows from the outside of the device toward the second swivel chamber at the second intake port. Since a part of the swirling airflow in the first swirl chamber flows into the second swirl chamber through the through hole with directivity, the airflow in the second swirl chamber has the same swirling direction as the airflow in the first swivel chamber, and the second intake air. The airflow flowing in from the mouth swirls on the swirling airflow.

Foreign matter in the second swirl chamber swirls in the second swirl chamber due to the swirling airflow generated in the second swirl chamber, and a part of the foreign matter moves from the through hole to the first swirl chamber. At this time, in the through hole, the airflow flowing from the first swivel chamber to the second swivel chamber and the airflow flowing from the second swivel chamber to the first swivel chamber are mixed, but the through hole is in the central axis direction. In the region on the other end side of the case, there is a large amount of airflow from the second swivel chamber to the first swivel chamber. The foreign matter moves in the direction of the central axis into the first swirl chamber by the flow of this air flow, and collides with the side surface of the cylindrical member by the inertial force. As a result, the foreign matter loses its momentum, swirls again due to the swirling airflow in the first swivel chamber, and moves to the second swivel chamber again through the through hole. By such an action, it is possible to suppress the re-scattering phenomenon in which the foreign matter in the second swirl chamber flows out from the outlet, and it is possible to suppress the deterioration of the separation performance.

The cyclone separating device according to the present invention is provided with a support member on the central axis of the cylindrical member at the end surface of the cylindrical member on the outlet side, and is bent in an arc shape from the support member toward the outer peripheral end of the cylindrical member. The arc blade is provided with a circular arc blade, and the bending direction is the same as the rotation direction of the swirling airflow generated by the fixed blade from the outer peripheral end toward the support member, and the arc blade is the cylindrical member and the cylindrical member. It has a configuration in which two or more pieces are arranged in a circle around the support member between the outlets.

As a result, the swirling airflow in the first swirl chamber is collected near the central axis while suppressing the re-scattering phenomenon due to the action of the cylindrical member, and the swirling airflow is converted into a flow toward the outlet in the central axis direction. Can be done. Therefore, the pressure loss in this device can be reduced.

In the cyclone separation device according to the present invention, the support member is a conical member, the bottom surface of the conical member is a conical shape having the same bottom surface as the end face of the cylindrical member, and the apex of the conical member is the flow. It has a configuration arranged so as to be on the exit side.

As a result, the swirling airflow of the first swirl chamber is collected near the central axis while suppressing the re-scattering phenomenon due to the action of the cylindrical member, and the swirling airflow is converted into a flow toward the outlet in the central axis direction. The conical member can smoothly convert the flow toward the outlet. Therefore, the pressure loss in this device can be further reduced.

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

(Embodiment 1)
FIG. 1 is an external view of the cyclone separation device according to the present embodiment, and is a first intake port 4 in which a plurality of fixing blades 3 are arranged in an opening 2 which is opened by rotating a side surface on one end side of a cylindrical case 1. On the other end side of the side surface of the case 1 opposite to the first intake port 4, the central axis 20 of the cylindrical case 1 can be positioned at the lowermost position in the gravity direction in a horizontally arranged state. It is provided with two intake ports 5.

The fixed blades 3 are arranged in the opening 2 with a constant gap over 360 degrees. In the present embodiment, 18 fixed blades 3 are provided and all face the same angle with respect to the center. As a result, the airflow that has passed through the fixed blade 3 becomes a swirling airflow. In the present embodiment, the opening 2 is opened 360 degrees, but a part of the opening 2 may be closed.

The opening area of the second intake port 5 is preferably about 0.5 to 3% of the opening area of the opening 2 which is the first intake port 4, and in the present embodiment, the second intake port 5 is used. The opening area of the mouth 5 is about 1.2% of the area of the opening 2. As described above, the second intake port 5 is very small with respect to the opening area of the opening 2 which is the first intake port 4. This is done so that the airflow flowing in from the first intake port 4 is the main air to be processed by this device. When it becomes larger than 3%, the inflow from the second intake port 5 increases, the air flow from the second swivel chamber 9 to the first swivel chamber 8 increases in the through hole 10 shown in FIG. 2, and in the first swivel chamber 8. It becomes difficult to move the separated foreign matter to the second swivel chamber 9 (detailed air flow and movement of the foreign matter will be described later). Further, the opening area of the second intake port 5 may not be too small, and the separated foreign matter accumulates in the vicinity of the second intake port 5, and the second intake port 5 is an opening for discharging the foreign matter, so that the foreign matter is discharged. This is because it needs to be large enough not to clog.

FIG. 2 is a cross-sectional view taken along the central axis 20 of the cylindrical case 1. The first intake port 4 side of the case 1 is closed to form an end surface 1A, and a cylindrical outlet 6 for communicating the outside of the device and the inside of the device is provided in the center thereof. The end face 1B on the opposite side of the end face 1A has no opening and is blocked.

A space dividing plate 7 is provided on the end surface 1B side of the case 1, the space on the inner peripheral side of the space dividing plate 7 is the first swivel chamber 8, the space on the outer peripheral side is the second swivel chamber 9, and the space dividing plate 7 is provided. Is inclined so that the cross-sectional area of the first swivel chamber 8 crossing the cylindrical central axis 20 of the case 1 gradually becomes smaller as the cross-sectional area of the first swivel chamber 8 moves away from the outlet 6. One end of the space dividing plate 7 is in contact with the side surface of the case 1, the end of the space dividing plate 7 is the end 7A, and the other end is in contact with the end surface 1B of the case 1. Let the end of 7 be the end 7B.

That is, the first swivel chamber 8 and the second swivel chamber 9 are formed in the cylindrical case 1 via the space dividing plate 7, and the end surface 1B of the case 1 is the first swivel chamber 8 and the second swivel chamber. It is in contact with 9 spaces. Further, the maximum diameter of the first swivel chamber 8 and the maximum diameter of the second swivel chamber 9 are the same. In the present embodiment, the space dividing plate 7 is inclined, but it may be cylindrical without being inclined.

Further, in the present embodiment, since the fixing blade 3 is arranged so as to be in contact with the opening 2 of the case 1 of the main body on the inner peripheral side end portion, the fixing blade 3 portion is configured to protrude from the case 1 of the main body. It has become. Further, when the fixing blade 3 is arranged so that the outer peripheral side end portion of the fixing blade 3 is in contact with the opening 2, the fixing blade 3 portion is housed in the case 1 of the main body.

The outlet 6 is cylindrical and is arranged on the same central axis 20 as the case 1 so as to penetrate the end surface 1A, and one end of the outlet 6 exceeds the end 7A of the space dividing plate 7 and enters the first swivel chamber 8. It protrudes to. It should be noted that one end of the outlet 6 does not have to exceed the end 7A. And the other side protrudes to the outside of the device so that the duct can be connected.

A feature of the present embodiment is that the central shaft 20 of the case 1 and the shaft are the same in the first swivel chamber 8, and the cylindrical member 11 is provided on the end surface 1B. The outflow side end surface 11A of the cylindrical member 11 may be located at a position overlapping the through hole 10 in the side view of FIG. 2, and in the present embodiment, the end surface 1B side of the through hole 10 in the direction of the central axis 20 is closer to the end surface 1B than the center. The outflow side end face 11A is arranged. Further, in the present embodiment, the diameter of the cylindrical member 11 is smaller than the diameter of the outlet 6, but may be equal to or larger than the diameter of the outlet 6.

Regarding the airflow in the through hole 10, a part of the swirling airflow in the first swirl chamber 8 passes through the through hole 10 and flows into the second swirl chamber 9. Further, as will be described later, there is also an air flow from the second swivel chamber 9 to the first swivel chamber 8. Most of these flows flow from the first swivel chamber 8 to the second swivel chamber 9 in the region close to the first intake port 4 of the through hole 10 in FIG. 2, and in the region close to the end surface 1B of the through hole 10. It has been visually confirmed by experiments that there is a large amount of flow from the second swivel chamber 9 to the first swivel chamber 8.

The cylindrical member 11 is for suppressing the foreign matter moving with the air flowing from the second swivel chamber 9 into the first swivel chamber 8 from being scattered downstream from the outlet 6, and is on the side closer to the end surface 1B. It is arranged at a position overlapping the region of the through hole 10. Then, the foreign matter that has moved from the second swivel chamber 9 to the first swivel chamber 8 flies to the vicinity of the central axis in the absence of the cylindrical member 11, and the flow toward the outlet 6 is dominant near the central axis. Since the flow flows downstream from the outlet 6 along the flow, the separation performance deteriorates. However, when the cylindrical member 11 is present, the foreign matter collides with the side surface of the cylindrical member 11 due to the inertial force and loses its momentum, but starts swirling due to the swirling airflow flowing around the cylindrical member 11 and moves to the space dividing plate 7 side due to the centrifugal force. It moves and moves from the through hole 10 to the second swivel chamber 9 again. By this action, it is possible to suppress the re-scattering phenomenon in which the foreign matter separated in the second swivel chamber 9 flows into the first swivel chamber 8 again and scatters downstream of the apparatus.

In the above configuration, the flow of airflow in the cyclone separator will be described.

When the outlet 6 and the blower (not shown) are connected by a duct and the blower is operated, the inside of the case 1 becomes negative pressure, so air is introduced from the first intake port 4 and the second intake port 5 which are in communication with the outside air. Inflows. However, as described above, the opening area of the second intake port 5 is 0.5 to 3% of the opening area of the opening 2 having the first intake port 4, so that most of them are the first intake port 4. Inflow from.

As shown in FIG. 2, the air flowing in from the first intake port 4 becomes a swirling airflow by the fixed blade 3, and travels in the direction of the end surface 1B of the case 1 while swirling in the first swirl chamber 8. At this time, since the cross-sectional area of the first swirl chamber 8 is gradually reduced, the centrifugal force acting on the foreign matter contained in the swirling airflow becomes stronger. The traveling direction of the swirling airflow with respect to the central axis 20 is reversed near the cylindrical member 11, passes near the center in the first swirl chamber 8, heads toward the outflow port 6, and flows out of the device.

Further, since a part of the swirling airflow of the first swirl chamber 8 flows in from the through hole 10 into the second swirl chamber 9 with directivity, the swirling airflow of the first swivel chamber 8 also enters the second swirl chamber 9. A swirling airflow in the same direction is generated.

The air flowing in from the second intake port 5 flows in the same direction due to the swirling airflow described above. The air flowing in from the second intake port 5 goes around the inside of the second swivel chamber 9 and enters the first swivel chamber 8 through the through hole 10, merges with the air flow in the first swivel chamber 8, and is outside the device from the outflow port 6. Outflow to.

Next, the action of separating the foreign matter flowing into the apparatus will be described.

Foreign substances (for example, small insects such as mosquitoes, Drosophila, mushroom flies, and moths) that have flowed in from the first intake port 4 together with air receive centrifugal force due to the swirling airflow in the first swirling chamber 8 and the space dividing plate 7 on the outer peripheral side. Go around the area. When the foreign matter passes near the through hole 10 during the orbiting, it tends to move outward. Therefore, the foreign matter moves from the first swivel chamber 8 to the second swivel chamber 9, that is, is separated through the through hole 10. The second swivel chamber 9 is a space for receiving the separated foreign matter, that is, a separation chamber.

Since the foreign matter has a larger mass than air, it is deposited near the second intake port 5 which is the lower part in the second swivel chamber 9 due to the action of gravity. When the foreign substance is a small insect or the like, it can float in the second swivel chamber 9 because it is still alive immediately after being separated into the second swivel chamber 9. However, since a swirling airflow is also generated in the second swirl chamber 9, it moves to the outer peripheral side of the second swirl chamber 9 due to centrifugal force, and returns from the through hole 10 to the first swirl chamber 8. Although it is suppressed, a part of it moves through the through hole 10 to the first swivel chamber 8.

The moved foreign matter is directed toward the central axis 20 and a swirling airflow is generated in the first swirl chamber 8, but the foreign matter is directed toward the central shaft 20 by inertial force and collides with the side surface of the cylindrical member 11. Lose momentum. Since a swirling airflow exists in the vicinity of the cylindrical member 11, the foreign matter that has lost its momentum swirls due to the swirling airflow, receives centrifugal force, moves to the space dividing plate 7 side, passes through the through hole 10 again, and passes through the second swirl chamber 9 again. Moved to and separated. That is, it is possible to suppress the re-scattering phenomenon of the foreign matter separated into the second swivel chamber by the cylindrical member 11.

Further, the second intake port 5 is also an opening for discharging the foreign matter once stored in the second swivel chamber 9 to the outside of the device. When the natural wind outside the device is no wind, as described above, air flows in from the second intake port 5, so that no foreign matter goes out. However, when the natural wind blows outside the device and the natural wind flows outside the second intake port 5, the static pressure drops according to Bernoulli's theorem, and when the static pressure drops below the inside of the device, foreign matter is attracted to the outside of the device. And discharged. In this device, the foreign matter once stored in the second swivel chamber 9 is discharged to the outside by using the natural wind in this way. This eliminates the need for maintenance of the cyclone separator.

As described above, the first intake port 4 having a plurality of fixed blades 3 provided in the circumferential opening 2 on one end side of the case 1, and the lowermost portion in the gravity direction on the side surface of the case 1 opposite to the first intake port 4. A second intake port 5 is provided in the case 1, and the inside of the case 1 is divided into a first swivel chamber 8 and a second swivel chamber 9 by a space dividing plate 7, and a first swivel chamber 8 and a second swivel chamber 9 are provided in the space dividing plate 7. A through hole 10 for communication is provided, and the main stream flows in from the first intake port 4 and flows through the first swivel chamber 8 to the outflow port 6, and some air flows in from the second intake port 5 and enters the second swivel chamber 9. By configuring the structure so that the air flows from the through hole 10 to the first swivel chamber 8 and flows to the outflow port 6, foreign matter that has flowed in together with the air from the first intake port 4 is separated in the first swivel chamber 8 and second from the through hole 10. Move to the swivel chamber 9. The second swivel chamber 9 has a role of a separation chamber for receiving the foreign matter separated in the first swivel chamber 8. That is, the cyclone separation device of the present embodiment has a configuration in which a separation chamber is provided around the first swirl chamber 8, and the air in the second swirl chamber 9, which is the separation chamber, is a swirling airflow. As a result, the separated foreign matter and the foreign matter that has flowed in from the second intake port 5 are suppressed from flowing into the first swivel chamber 8 through the through hole 10, and by any chance, the second swivel chamber 9 passes through the through hole 10. Even if the foreign matter moves to the one swivel chamber 8, the foreign matter can be separated again by the action of the cylindrical member 11 and returned to the second swivel chamber 9, so that the deterioration of the separation performance is suppressed, that is, the separation performance is improved.

In addition, this device is intended to be used as a hood to prevent wind and rain at the intake port of the outer wall of the building. In other words, it is a hood with a function to separate foreign substances.

When it is installed on the outdoor outer wall, if it rains, rainwater flows in from the first intake port 4, but since the first intake port 4 is opened 360 degrees, it falls downward as it is. Since the end of the outflow port 6 projects from the first intake port 4 toward the first swivel chamber 8, rainwater does not directly enter the outflow port 6. Even if it should flow into the device, since the outlet 6 is located in the center of the end surface of the case 1, there is no possibility that rainwater will enter downstream from the outlet 6. Even if the spray flows into the case 1, it can be attached to the space dividing plate 7 by the swirling airflow. In the present embodiment, since the space dividing plate 7 is inclined toward the first intake port 4, the rainwater adhering to the space dividing plate 7 flows out to the first intake port 4.

Further, even if a strong wind blows, the first intake port 4 is opened 360 degrees, so that the wind can escape. Further, due to the structure described above, the wind does not directly flow into the outlet 6.

In other words, this device has a function to separate foreign substances compactly, but it surely suppresses the original function as a hood to prevent wind and rain.

(Embodiment 2)
The description of the portion having the same configuration as that of the first embodiment will be omitted.

As shown in FIG. 3, the characteristic configuration of the second embodiment is that a cylindrical support member 12 is provided at the center of the cylindrical member on the outlet 6 side of the cylindrical member 11, and the support member 12 and the cylindrical member 11 are provided. The arc blades 13 connecting the outer peripheral surfaces of the above in an arc shape are arranged in a circle around the support member 12 at equal intervals.

FIG. 4 is a view of the cylindrical member 11, the support member 12, and the arc blade 13 as viewed from the outlet 6 side. The black arrow indicates the direction of the swirling airflow in the first swirl chamber 8. As shown in FIG. 4, the bending direction of the arc of the arc blade 13 is the same as the swirling airflow generated in the first swirl chamber 8, that is, the arc blade 13 is curved so as to receive the wind of the swirling airflow.

In the present embodiment, the shape of one arc blade 13 is a semicircular shape that is opened 180 degrees, but it may be smaller than 180 degrees, that is, the degree of curvature may be small.

Further, the length of the arc blade 13 in the central axis 20 direction is longer than that of the cylindrical member 11 so that a gap is formed between the arc blade 13 and the end of the outlet 6. The length of the arc blade 13 may be extended to a position where it overlaps with the end of the outlet 6.

With such a configuration, the swirling airflow is collected by the arc blade 13 on the support member 12 side, that is, near the central axis 20, and the collected air is opened on the outlet 6 side, so that the airflow flows toward the outlet 6 side. Will be converted. As a result, the airflow quickly flows out to the outlet 6 while suppressing the re-scattering phenomenon, so that the pressure loss of the apparatus can be reduced.

(Embodiment 3)
The description of the portion having the same configuration as that of the first embodiment and the second embodiment will be omitted.

As shown in FIG. 5, the characteristic configuration of the present embodiment is that the shape of the support member 12 is a conical shape, the bottom surface of the cone is the same as the diameter of the cylindrical member 11, and the apex side of the cone is the outlet. It faces the 6th side. Four arc blades 13 are evenly arranged in a circle around the conical support member 12. The view seen from the outlet 6 side is the same as that in FIG. 4, and the bending direction of the arc blade 13 is also the same as that described in the second embodiment.

The conical shape of the support member 12 makes it possible to more smoothly change the direction of the swirling airflow collected toward the central axis 20 side by the arc blade 13 toward the outlet 6 side, further reducing the pressure loss of this device. Can be made to. That is, it is possible to obtain a cyclone separation device having a low pressure loss while suppressing the re-scattering phenomenon.

The cyclone separation device according to the present invention can suppress the deterioration of the separation performance by suppressing the re-scattering phenomenon, separate the foreign matter and return it to the outdoors, and prevent the invasion of wind and rain while suppressing the pressure loss to be low. Therefore, it is useful as an outdoor hood or the like to be attached to the ventilation port (air supply side) of the building.

1 Case 1A End face 1B End face 2 Opening 3 Fixed blade 4 First intake port 5 Second intake port 6 Outlet 7 Space dividing plate 7A End 7B End 8 First swivel chamber 9 Second swivel chamber 10 Through hole 11 Cylindrical Member 11A Outflow side end face 12 Support member 13 Arc blade 20 Central axis

Claims (4)

A first intake port that is provided around the side surface on one end side of the case to allow air to flow into the case and generate a swirling airflow in the case.
A second intake port provided on the side surface on the other end side of the case and located at the lowermost part in the direction of gravity with the central axis of the case horizontally arranged.
A cylindrical outlet provided on one end surface of the case on one end side to allow air flowing in from the first intake port to flow out of the case.
In the case, the space is divided into a first swivel chamber that communicates with the first intake port and a second swivel chamber that is located on the outer peripheral side of the first swivel chamber and communicates with the second intake port. Board and
A through hole provided in the space dividing plate and penetrating the first swivel chamber and the second swivel chamber,
A cylindrical member provided on the other end side of the case in the first swivel chamber and
With
The central axis of each of the outlet and the cylindrical member is arranged in the same manner as the central axis of the case.
When the cylindrical member is viewed from the side, the end surface of the cylindrical member on the outlet side is located in a range overlapping the through hole in the central axis direction of the through hole. The first swivel chamber is characterized in that the cross section perpendicular to the central axis of the case is gradually reduced from one end side of the case toward the other end side of the case. The cyclone separation device according to claim 1. A support member provided on the end face of the cylindrical member and arranged in the same manner as the central axis of the case is further provided.
The support member has a plurality of arc blades curved in an arc shape from the central axis of the case toward the outer peripheral side.
The cyclone separation device according to claim 1 or 2, wherein the bending direction of the arc blade is the same as the rotation direction of the swirling airflow generated by the first intake port. The support member has a conical shape having a bottom surface having the same diameter as the end face of the cylindrical member, and is characterized in that the apex is formed so as to be on the outlet side when the support member is viewed from the side. The cyclone separation device according to claim 3.