JP6964263B2 - Separator - Google Patents

Description

The present invention relates to a separation device, and more particularly to a separation device that separates a solid contained in a gas from the gas.

Conventionally, a separation device including an outer cylinder, a rotating body, a plurality of blades, and a motor is known (Patent Document 1).

Each of the plurality of blades is arranged parallel to the rotation center axis of the rotating body in the space (flow path) between the outer peripheral surface of the rotating body and the inner peripheral surface of the outer cylinder. The plurality of blades are arranged apart from each other in the circumferential direction of the rotating body. Each of the plurality of blades is connected only to the rotating body among the rotating body and the outer cylinder body. In the separating device, there is a gap between each of the plurality of blades and the inner peripheral surface of the outer cylinder.

In the separation device, the outer cylinder is formed with a discharge hole for discharging the solid in the air passing through the flow path to the container. The discharge hole communicates the flow path with the internal space of the container. In the separation device, the solid discharged from the flow path through the discharge hole enters the container and is collected in the container.

The separation device described in Patent Document 1 has a problem that the sound (wind noise) generated when a plurality of blades are rotated by rotating a rotating body is large.

Japanese Unexamined Patent Publication No. 2017-192925

An object of the present invention is to provide a separating device capable of suppressing the generation of sound when a rotating body is rotated.

The separation device according to one aspect of the present invention includes an outer cylinder, a rotating body, a plurality of blades, and a motor. The outer cylinder has a gas inlet at the first end and a gas outlet at the second end. The rotating body is arranged inside the outer cylinder. The rotating body is arranged so that its rotation center axis is aligned with the center axis of the outer cylinder. The plurality of blades are arranged apart from each other in the circumferential direction of the rotating body between the rotating body and the outer cylinder body, and are provided integrally with the rotating body among the rotating body and the outer cylinder body. Has been done. The motor rotates the rotating body in one direction around the rotation center axis. The outer cylinder has a discharge hole penetrating in the thickness direction of the outer cylinder between the first end and the second end. At least a part of the discharge hole has an elongated slit shape in a direction inclined with respect to a direction parallel to the rotation center axis.

FIG. 1A is a perspective view of a main part of the separation device according to the embodiment of the present invention. FIG. 1B is a perspective view of a main part of the separation device as seen from another direction. FIG. 2A is a front view of the separation device of the same. FIG. 2B is a left side view of the separation device of the same. FIG. 3 shows the separation device of the same as above, and is a cross-sectional view taken along line XX of FIG. 2A. FIG. 4 shows the separation device of the same as above, and is a cross-sectional view taken along the line YY of FIG. 2A. FIG. 5 is an exploded perspective view of the separation device of the same. FIG. 6 is an explanatory diagram of the relative positional relationship of the plurality of slits of the outer cylinder in the same separation device. FIG. 7 is an explanatory diagram of the relative positional relationship between the slit of the outer cylinder and the plurality of blades in the separation device of the same. FIG. 8 is a cross-sectional view of the separation device according to the first modification of the embodiment of the present invention. FIG. 9 is a perspective view of an outer cylinder in the separation device according to the second modification of the embodiment of the present invention.

(Embodiment)
Hereinafter, the separation device 1 according to the embodiment will be described with reference to FIGS. 1A, 1B, 2A, 2B, and 3 to 7.

The separation device 1 according to the embodiment is provided, for example, on the upstream side of an air conditioning facility having a ventilation function, and separates solids in air (gas). The air conditioner is, for example, a blower that blows air from the upstream side to the downstream side. The blower is, for example, an electric fan. The air conditioning equipment is not limited to the blower, and may be, for example, an air conditioning system including a ventilation device, an air conditioner, an air supply cabinet fan, a blower and a heat exchanger. Flow rate of air flowing through the separation device 1 by the air conditioning equipment, for example, a 100m ³ / h~300m ³ / h. The flow rate of the air flowing through the separation device 1 is substantially the same as the flow rate of the air flowing through the air conditioning equipment.

As shown in FIGS. 1A, 1B, 2A, 2B, 3 to 5, the separating device 1 includes an outer cylinder body 2, a rotating body 3, a plurality of blades 36, and a motor 4. The outer cylinder 2 has a gas inlet 23 at the first end 21 and a gas outlet 24 at the second end 22. The rotating body 3 is arranged inside the outer cylinder body 2. The plurality of blades 36 are connected to the rotating body 3. In the separating device 1, as shown in FIG. 3, a flow path 5 from the inflow port 23 to the outflow port 24 is formed between the outer cylinder body 2 and the rotating body 3. The motor 4 rotates the rotating body 3. Here, the separating device 1 includes a shaft 7 connected to both the rotating body 3 and the rotating shaft 42 of the motor 4. Further, the separating device 1 includes a shaft joint (shaft coupling) 8 that connects the shaft 7 and the rotating shaft 42 of the motor 4 (see FIGS. 3 and 5).

The separation device 1 can flow the air flowing into the flow path 5 from the upstream side to the downstream side of the flow path 5 while spirally rotating around the rotating body 3. The "upstream side" here means the upstream side (primary side) when viewed in the direction of air flow. Further, the "downstream side" means the downstream side (secondary side) when viewed in the direction of air flow. The outer cylinder 2 of the separating device 1 has a discharge hole 25 (FIGS. 4 to 7) penetrating in the thickness direction of the outer cylinder 2 in order to discharge the solid contained in the air to the outside of the outer cylinder 2. See). The discharge hole 25 connects the internal space of the outer cylinder 2 and the outer space of the outer cylinder 2. In other words, the discharge hole 25 communicates the inside and outside of the outer cylinder 2.

Examples of the solid in the air include fine particles, dust and the like. Examples of the fine particles include particulate matter and the like. Particulate matter includes primary particles that are directly released into the air as fine particles, secondary particles that are released into the air as gas and are produced as fine particles in the air, and the like. Examples of the primary particles include soil particles (yellow sand and the like), dust, plant particles (pollen and the like), animal particles (mold spores and the like), soot and the like. As the particulate matter, examples of the size classification include PM2.5 (microparticulate matter), PM10, SPM (suspended particulate matter) and the like. PM2.5 is a fine particle that permeates a sizing device having a particle size of 2.5 μm and a collection efficiency of 50%. PM10 is a fine particle that permeates a sizing device having a particle size of 10 μm and a collection efficiency of 50%. The SPM is a fine particle that permeates a sizing device having a particle size of 10 μm and a collection efficiency of 100%, corresponds to PM6.5-7.0, and is a little smaller than PM10.

Each component of the separation device 1 will be described in more detail below.

As described above, the separating device 1 includes an outer cylinder 2, a rotating body 3, a plurality of blades 36, a motor 4, a shaft 7, and a shaft joint 8.

The outer cylinder 2 is formed in a cylindrical shape, and has a gas inlet 23 at the first end 21 and a gas outlet 24 at the second end 22. The material of the outer cylinder 2 is, for example, ABS resin.

As shown in FIGS. 3 and 4, the rotating body 3 is arranged coaxially with the outer cylinder 2 inside the outer cylinder 2. "Arranged coaxially with the outer cylinder 2" means that the rotating body 3 uses the rotation center axis 30 of the rotating body 3 (see FIG. 3) as the center axis 20 of the outer cylinder 2 (see FIG. 3). It means that they are arranged so as to be aligned. In the rotating body 3, the outer peripheral line in the cross section orthogonal to the rotation center axis 30 (see, for example, FIG. 4) has a circular shape. The material of the rotating body 3 is, for example, a polycarbonate resin.

The length of the rotating body 3 is shorter than the length of the outer cylinder 2 in the direction along the rotation central axis 30 of the rotating body 3. As shown in FIG. 3, the rotating body 3 has a first end 31 on the inflow port 23 side and a second end 32 on the outflow port 24 side. The first end 31 of the rotating body 3 is arranged near the inflow port 23 between the inflow port 23 and the outflow port 24 of the outer cylinder body 2 in the direction along the central axis 20 of the outer cylinder body 2. There is. Further, the second end 32 of the rotating body 3 is arranged near the outflow port 24 between the inflow port 23 and the outflow port 24 of the outer cylinder body 2 in the direction along the central axis 20 of the outer cylinder body 2. Has been done.

Between the outer cylinder 2 and the rotating body 3, a plurality of (here, 24) blades 36 connected to the rotating body 3 are arranged. The material of each of the plurality of blades 36 is, for example, a polycarbonate resin.

As shown in FIGS. 3 and 4, each of the plurality of blades 36 is arranged so as to form a gap between the outer cylinder 2 and the inner peripheral surface 27 of the outer cylinder 2. In other words, in the separating device 1, there is a gap between each of the plurality of blades 36 and the inner peripheral surface 27 of the outer cylinder 2. That is, the protrusion length of each of the plurality of blades 36 from the outer peripheral surface 37 of the rotating body 3 is the distance between the outer peripheral surface 37 of the rotating body 3 and the inner peripheral surface 27 of the outer cylinder 2 in the radial direction of the rotating body 3. Shorter than. Each of the plurality of blades 36 is arranged parallel to the rotation center axis 30 of the rotating body 3 in the space (flow path 5) between the outer peripheral surface 37 of the rotating body 3 and the inner peripheral surface 27 of the outer cylinder 2. There is. Each of the plurality of blades 36 has a flat plate shape. Each of the plurality of blades 36 is arranged so as to intersect (substantially orthogonal in the present embodiment) in a direction along the circumferential direction of the rotating body 3. As shown in FIG. 4, the plurality of blades 36 are arranged at substantially equal intervals in the circumferential direction of the rotating body 3.

As shown in FIGS. 3 and 5, the above-mentioned rotating body 3 includes two rotating members 3a and 3b arranged in a direction along the central axis 20 (see FIG. 3) of the outer cylinder body 2. As shown in FIG. 3, the rotating members 3a and 3b are formed in a bottomed cylindrical shape. More specifically, the two rotating members 3a and 3b have bottom walls 33a and 33b at the first ends 31a and 31b on the inflow port 23 side, and openings 34a at the second ends 32a and 32b on the outflow port 24 side. It has 34b. In the following, for convenience of explanation, the rotating member 3a located at a position closer to the inflow port 23 (relatively upstream side) among the two rotating members 3a and 3b is referred to as an upstream rotating member 3a, and a position close to the outflow port 24 ( The rotating member 3b located on the downstream side) may also be referred to as a downstream rotating member 3b. In the bottomed cylindrical upstream rotating member 3a, the bottom wall 33a is formed so as to bulge toward the inflow port 23. As a result, in the separation device 1, it is possible to reduce the pressure loss of the gas flowing in from the inflow port 23 of the outer cylinder body 2. Further, inside the upstream rotating member 3a, a reinforcing wall 38 integrated with the upstream rotating member 3a is provided. As a result, in the separating device 1, the mechanical strength of the upstream rotating member 3a can be further improved. Further, inside the bottomed cylindrical downstream rotating member 3b, a cylindrical rib 39 projecting from the central portion of the bottom wall 33b of the downstream rotating member 3b toward the opening 34b is provided. The length of the rib 39 is shorter than the length of the downstream rotating member 3b in the direction along the central axis 20 of the outer cylinder 2.

In the separating device 1, each of the plurality of blades 36 is composed of a blade piece 36a protruding from the outer peripheral surface of the upstream rotating member 3a and a blade piece 36b protruding from the outer peripheral surface of the downstream rotating member 3b. (See Fig. 3). In other words, in the separating device 1, a pair of a plurality of (24 pieces) blade pieces 36a connected to the upstream rotating member 3a and a plurality of (24 pieces) blade pieces 36b connected to the downstream rotating member 3b are paired. It corresponds with one, and constitutes a plurality of (24 blades) blades 36. Hereinafter, for convenience of explanation, the blade piece 36a may be referred to as an upstream blade piece 36a, and the blade piece 36b may be referred to as a downstream blade piece 36b.

The plurality of upstream blade pieces 36a are arranged at equal angular intervals (15 degrees) in the circumferential direction of the rotating body 3. The "equal angle interval" here does not have to be exactly the same interval, and may be any angle interval within a predetermined angle range (specified angle ± 20%: 15 degrees ± 3 degrees). Further, the plurality of downstream blade pieces 36b are arranged at equal angular intervals (15 degrees) in the circumferential direction of the rotating body 3. The "equal angle interval" here does not have to be exactly the same interval, and may be any angle interval within a predetermined angle range (specified angle ± 20%: 15 degrees ± 3 degrees). The upstream blade piece 36a and the downstream blade piece 36b, which correspond one-to-one, are aligned in a straight line in a direction parallel to the central axis 20 of the outer cylinder 2.

As shown in FIGS. 3 and 5, the rotating body 3 is connected to the rotating shaft (shaft) 42 of the motor 4 via a shaft 7 and a shaft joint 8. More specifically, in the separating device 1, the rotating body 3 is connected to the shaft 7, and the shaft 7 is connected to the rotating shaft 42 of the motor 4 by the shaft joint 8. In the separating device 1, the rotating shaft 42 and the shaft 7 are arranged so as to be aligned with each other.

The motor 4 rotates the rotating body 3 around the rotation center axis 30 of the rotating body 3. The rotation speed of the rotating body 3 is, for example, 1500 rpm to 3000 rpm. The motor 4 is, for example, a DC motor. The motor 4 is driven by, for example, an external drive circuit.

As shown in FIG. 3, the motor 4 includes a motor main body 41 and the above-mentioned rotating shaft 42 having a part protruding from the motor main body 41. The rotating shaft 42 has a columnar shape. The motor 4 is arranged inside the rotating body 3. More specifically, the motor 4 is arranged inside the downstream rotating member 3b. Here, the separating device 1 includes a motor housing 9 (see FIGS. 3 and 5) that houses the motor 4 and the shaft joint 8. The motor housing 9 is housed in the downstream rotating member 3b. The motor housing 9 is fixed to the rear cover 12, which will be described later, with a plurality of screws.

The material of the motor housing 9 is, for example, aluminum. As shown in FIG. 3, the motor housing 9 has a housing main body portion 90 and a flange portion 95. The housing body 90 has a bottom wall 93 at the first end 91 on the inflow port 23 side and an opening 94 at the second end 92 on the outflow port 24 side. Here, in the motor housing 9, a circular hole 931 through which the shaft joint 8 passes is formed in the bottom wall 93 of the housing main body 90. Further, the motor housing 9 has a bottomed cylindrical shaft joint accommodating portion 98 projecting from the peripheral edge of the hole 931 in the bottom wall 93 toward the inflow port 23. In the motor housing 9, a circular hole 987 through which the shaft 7 passes is formed in the bottom wall 983 of the shaft joint accommodating portion 98. The flange portion 95 projects outward from the second end 92 of the housing main body 90 in the radial direction of the housing main body 90. The flange portion 95 is provided to fix the motor housing 9 to the rear cover 12 with a plurality of screws.

The shaft 7 (see FIGS. 3 to 5) has a round bar shape and has a first end 71 in the longitudinal direction and a second end 72 opposite to the first end 71. The material of the shaft 7 is, for example, stainless steel. The shaft 7 is arranged so that its axis coincides with the rotation center axis 30 of the rotating body 3. In other words, the shaft 7 is arranged so that its axis coincides with the central axis 20 of the outer cylinder 2. A part of the shaft 7 is arranged in the rotating body 3. More specifically, in the separating device 1, the first end 71 of the shaft 7 is arranged outside the first end 21 of the outer cylinder 2 in the direction along the central axis 20 of the outer cylinder 2, and the shaft 7 is arranged. The second end 72 of the is arranged inside the downstream rotating member 3b. Here, as shown in FIG. 3, the shaft 7 has a hole 35a formed in the center of the bottom wall 33a of the upstream rotating member 3a and a hole 35b formed in the center of the bottom wall 33b of the downstream rotating member 3b. And pass through. Further, the rotating body 3 is connected to the shaft 7 by two bolts 78 (see FIG. 3) and two nuts having a one-to-one correspondence with the two bolts 78. Each of the two bolts 78 passes through a radial through hole in the shaft 7. As a result, the rotating body 3 can rotate together with the shaft 7.

The separating device 1 includes a first bearing 75 and a second bearing 76 (see FIGS. 3 and 5) for rotatably supporting the shaft 7. As a result, in the separation device 1, the rotating body 3 can be rotated more stably by the motor 4. In the separating device 1, the first bearing 75 rotatably supports the first end 71 of the shaft 7. Further, in the separating device 1, the second bearing 76 rotatably supports a portion of the shaft 7 near the second end 72. The second bearing 76 is fixed to the bottom wall 983 of the shaft joint accommodating portion 98 by two screws. The second end 72 of the shaft 7 is connected to the rotating shaft 42 of the motor 4 by a shaft joint 8. The shaft joint 8 is arranged inside the downstream rotating member 3b.

As shown in FIGS. 1A to 15, the separating device 1 further includes a front cover (first cover) 11 and a rear cover (second cover) 12. Further, the separating device 1 further includes a bottom cover (third cover) 13 as shown in FIGS. 2A, 3, 4 and 5.

The front cover 11 is detachably attached to the first flange 211 (see FIGS. 1B and 2) protruding outward from the first end 21 of the outer cylinder 2 by a plurality of (for example, four) screws. .. The rear cover 12 is detachably attached to the second flange 221 (see FIG. 1A) protruding outward from the second end 22 of the outer cylinder 2 by a plurality of (for example, four) screws. The bottom cover 13 is detachably attached to each of the front cover 11 and the rear cover 12 by a plurality of (for example, two) screws.

The outer peripheral shape of the front cover 11 is square when viewed from one direction along the central axis 20 of the outer cylinder 2. As shown in FIG. 1A, the front cover 11 includes a first frame portion 111, a bearing mounting portion 112, and four first beam portions 113. The first frame portion 111 is arranged so as to overlap the first flange 211. The outer peripheral shape of the first frame portion 111 is the same as the outer peripheral shape of the front cover 11. The inner peripheral shape of the first frame portion 111 is a circular shape. The inner diameter of the first frame portion 111 is substantially the same as the inner diameter of the outer cylinder 2. The first frame portion 111 is fixed to the first flange 211 by a plurality of screws. The bearing mounting portion 112 has an annular shape and is arranged inside the first frame portion 111. The above-mentioned first bearing 75 is attached to the bearing attachment portion 112. The four first beam portions 113 connect the first frame portion 111 and the bearing mounting portion 112. The four first beam portions 113 are arranged at substantially equal intervals in the circumferential direction of the bearing mounting portion 112. The first bearing 75 is a bush bearing, and is attached to the bearing mounting portion 112 by being press-fitted into the bearing mounting portion 112. The material of the front cover 11 is, for example, aluminum.

The outer peripheral shape of the rear cover 12 is square when viewed from one direction along the central axis 20 of the outer cylinder 2. As shown in FIG. 1B, the rear cover 12 includes a second frame portion 121, a housing mounting portion 122, and four second beam portions 123. The outer peripheral shape of the second frame portion 121 is the same as the outer peripheral shape of the rear cover 12. The inner peripheral shape of the second frame portion 121 is a circular shape. The inner diameter of the second frame portion 121 is preferably the same as the inner diameter of the outer cylinder 2. The second frame portion 121 is arranged so as to overlap the second flange 221. The second frame portion 121 is fixed to the second flange 221 by a plurality of screws. The housing mounting portion 122 has an annular shape and is arranged inside the second frame portion 121. The flange portion 95 of the motor housing 9 is arranged so as to overlap the housing mounting portion 122. The flange portion 95 of the motor housing 9 is fixed to the housing mounting portion 122 by a plurality of screws. The four second beam portions 123 connect the second frame portion 121 and the housing mounting portion 122. The four second beam portions 123 are arranged at substantially equal intervals in the circumferential direction of the housing mounting portion 122. The material of the rear cover 12 is, for example, aluminum.

The bottom cover 13 (see FIGS. 2A, 3, 4 and 5) is coupled to the front cover 11 and the rear cover 12. The bottom cover 13 is arranged below the outer cylinder 2. The bottom cover 13 is a rectangular plate whose longitudinal direction is the direction along the central axis 20 of the outer cylinder 2, one end in the longitudinal direction is fixed to the front cover 11 by a plurality of screws, and the other end in the longitudinal direction. Is fixed to the rear cover 12 by a plurality of screws. The length of the bottom cover 13 in the longitudinal direction is longer than the length of the outer cylinder 2, and the length of the bottom cover 13 in the lateral direction is longer than the outer diameter of the outer cylinder 2. The material of the bottom cover 13 is, for example, aluminum.

In the separating device 1, the housing 100 including the front cover 11, the rear cover 12, and the bottom cover 13 surrounds the outer cylinder 2 from three sides, as shown in FIG. 2A. The housing 100 may include a top cover arranged above the outer cylinder 2 in addition to the front cover 11, the rear cover 12, and the bottom cover 13. Further, the housing 100 may include a pair of side covers arranged on both sides of the outer cylinder 2 in the radial direction of the outer cylinder 2.

The separating device 1 further includes a front panel 16, a rear panel 17, and a ventilation panel 18, as shown in FIGS. 2A, 2B, 3 and 5.

The outer peripheral shape of the front panel 16 is square. The front panel 16 is formed with ventilation holes 161 (see FIGS. 1A, 3 and 5) penetrating in the thickness direction thereof. The front panel 16 is arranged so as to be overlapped on the side of the front cover 11 opposite to the outer cylinder 2 side. The front panel 16 is fixed to the front cover 11 by a plurality of screws. The opening shape of the ventilation hole 161 is a circular shape. The inner diameter of the ventilation hole 161 is smaller than the inner diameter of the outer cylinder 2 and the outer diameter of the rotating body 3, and is larger than the outer diameter of the bearing mounting portion 112 of the front cover 11. The material of the front panel 16 is, for example, aluminum.

The outer peripheral shape of the rear panel 17 is square. The rear panel 17 is formed with ventilation holes 171 (see FIGS. 2B, 3 and 5) penetrating in the thickness direction thereof. The rear panel 17 is arranged so as to be overlapped on the side of the rear cover 12 opposite to the outer cylinder 2 side. The rear panel 17 is fixed to the rear cover 12 by a plurality of screws. The opening shape of the ventilation hole 171 is a circular shape. The inner diameter of the ventilation hole 171 is smaller than the inner diameter of the outer cylinder 2 and larger than the outer diameter of the rotating body 3 and the outer diameter of the housing mounting portion 122 of the rear cover 12. The material of the rear panel 17 is, for example, aluminum.

The outer peripheral shape of the ventilation panel 18 is a substantially circular shape. The outer diameter of the ventilation panel 18 is the same as the outer diameter of the housing mounting portion 122 (see FIGS. 1B and 2B) in the rear cover 12. A mesh 181 (see FIGS. 2B and 3) is provided at the center of the ventilation panel 18. The ventilation panel 18 is arranged so as to overlap the housing mounting portion 122 on the side of the rear cover 12 opposite to the outer cylinder 2 side. The ventilation panel 18 is fixed to the housing mounting portion 122 by a plurality of screws.

In the separation device 1, the rotation direction of the rotating body 3 connected to the shaft 7 is the same as the rotation direction of the rotation shaft 42 (see FIG. 3) of the motor 4. The rotation direction of the rotating body 3 is a clockwise direction (direction of arrow A1 in FIG. 4) when viewed from the inflow port 23 side of the outer cylinder body 2. The rotation direction of the rotating body 3 is a counterclockwise direction when viewed from the outlet 24 side of the outer cylinder body 2. The rotational angular velocity of the rotating body 3 is the same as the rotational angular velocity of the rotating shaft 42 of the motor 4.

In the separating device 1, when the rotating body 3 is rotated by the rotation of the rotating shaft 42 of the motor 4, the rotating body 3 and the plurality of blades 36 are rotated in the same direction. The separating device 1 applies a force in the rotation direction around the rotation center axis 30 (see FIG. 3) to the air flowing into the flow path 5 (see FIGS. 3 and 4) by rotating the rotating body 3. Is possible. In the separating device 1, when the rotating body 3 rotates, the velocity vector of the air flowing through the flow path 5 has a velocity component in the direction parallel to the rotation center axis 30 and a velocity component in the rotation direction around the rotation center axis 30. And will have.

Regarding the separation characteristics of the separation device 1, the separation efficiency tends to increase as the rotation speed of the rotating body 3 increases. Further, regarding the separation characteristics of the separation device 1, the separation efficiency tends to increase as the particle size increases. In the separation device 1, for example, it is preferable that the rotation speed of the rotating body 3 is set so as to separate fine particles having a specified particle size or larger. As the fine particles having a specified particle size, for example, particles having an aerodynamic particle size of 0.3 μm to 10 μm are assumed. The "aerodynamic particle size" means the diameter of a particle whose aerodynamic behavior is equivalent to a spherical particle having a specific density of 1.0. The aerodynamic particle size is the particle size obtained from the sedimentation rate of the particles. As the solid that remains in the air without being separated by the separating device 1, for example, fine particles having a smaller particle size than the fine particles that are supposed to be separated by the separating device 1 (in other words, separating by the separating device 1). Fine particles with a mass smaller than the assumed mass of fine particles) can be mentioned.

As described above, the outer cylinder 2 of the separating device 1 has a discharge hole 25 penetrating between the first end 21 and the second end 22 of the outer cylinder 2 in the thickness direction of the outer cylinder 2 (FIG. FIG. 4-7).

The discharge hole 25 has an elongated slit shape in a direction inclined with respect to a direction parallel to the rotation center axis 30. Here, the discharge hole 25 has an elongated slit shape in a direction parallel to the rotation center axis 30 and a direction between the rotation direction A1 of the rotating body 3. More specifically, the discharge hole 25 has a spiral shape in a spiral direction along the rotation direction A1 of the rotating body 3. "Spiral in the spiral direction" means a shape formed by at least a portion of a spiral. At least a part of the helix means that the number of revolutions of the helix may be less than one. In the discharge hole 25 of the separation device 1 according to the embodiment, the discharge hole 25 has a spiral rotation speed of less than 1.

The above-mentioned discharge hole 25 is formed from the first end 21 to the second end 22 of the outer cylinder body 2. As a result, in the separation device 1, the outer cylinder 2 has a position regardless of the size of the solid in the air flowing into the outer cylinder 2 and the position of the outer cylinder 2 in the direction along the central axis 20 (see FIG. 3). The solid passing near the inner peripheral surface 27 (see FIGS. 3 and 4) can be discharged from the discharge hole 25.

In the separation device 1 according to the embodiment, the outer cylinder 2 has a plurality of discharge holes 25. The plurality of discharge holes 25 are arranged in the circumferential direction of the outer cylinder 2. Here, the plurality of discharge holes 25 are arranged at equal intervals in the circumferential direction of the outer cylinder 2. The "equal intervals" here do not have to be exactly the same intervals, and may be intervals within a predetermined range (specified distance ± 20%). Further, in the separation device 1 according to the first embodiment, the plurality of discharge holes 25 have the same shape.

In the separation device 1 according to the embodiment, as shown in FIG. 6, two discharge holes 25 adjacent to each other in the circumferential direction of the outer cylinder 2 of the plurality of discharge holes 25 overlap in a direction parallel to the rotation center axis 30. ing. In the example of FIG. 6, the portion of one of the two adjacent discharge holes 25 formed at the first end 21 of the outer cylinder 2 and the second of the other discharge holes 25 of the outer cylinder 2 The portions formed at the two ends 22 overlap in one direction parallel to the rotation center axis 30 (the overlapping distance when viewed from one of the rotation center axes 30 is defined as S3).

In the separation device 1 according to the embodiment, as described above, the plurality of blades 36 are arranged at equal angular intervals in the rotation direction A1 of the rotating body 3. On the other hand, in the outer cylinder 2, the distance between both ends of the discharge hole 25 in the direction along the rotation direction A1 (distance between both ends of the discharge hole 25 in the circumferential direction of the outer cylinder 2) S1 is, for example, As shown in FIG. 7, it is an integral multiple (3 times in the example of FIG. 7) of the maximum distance S2 in the rotation direction A1 (see FIG. 4) between two blades 36 adjacent to each other among the plurality of blades 36. Is preferable. Assuming that n is an integer of 1 or more, the distance S1 between both ends of the discharge hole 25 in the circumferential direction of the outer cylinder 2 is the maximum distance S2 in the rotation direction A1 between two blades 36 adjacent to each other among the plurality of blades 36. Is n times. In the separation device 1 according to the embodiment, the case is n = 3, but the case is not limited to this, and n = 1, n = 2 or n ≧ 3 may be used.

In the separating device 1, the outside air passes through the space inside the ventilation holes 161 (see FIGS. 1A, 3 and 5) of the front panel 16 and the first frame portion 111 (see FIG. 1A) of the front cover 11 of the outer cylinder 2. It flows into the inflow port 23. The solid contained in the air flowing into the outer cylinder 2 is spirally rotated in the flow path 5 (see FIG. 3) from the rotation center axis 30 (see FIG. 3) of the rotating body 3 to the outer cylinder 2. Receives centrifugal force in the direction toward the inner peripheral surface 27 of the. The solid subjected to the centrifugal force moves toward the inner peripheral surface 27 of the outer cylinder 2, and spirally rotates around the inner peripheral surface 27 of the outer cylinder 2 along the inner peripheral surface 27. Then, in the separation device 1, a part of the solid in the air is discharged from the discharge hole 25 (see FIG. 4) while passing through the flow path 5.

In the separation device 1, since a swirling flow is generated inside the outer cylinder 2, a part of solids (dust, etc.) in the air flowing into the outer cylinder 2 from the inflow port 23 of the outer cylinder 2 is discharged. A part of the air (cleaned air) discharged through the holes 25 and separated (removed) of solids (dust and the like) flows out from the outlet 24 of the outer cylinder 2.

The separation device 1 can discharge the solid in the air flowing into the flow path 5 from the discharge hole 25, and can flow the separated solid air to the downstream side, so that the solid can be separated from the air. It is possible to separate efficiently.

The separation device 1 is used, for example, in an air purification system installed in a house or the like, arranged on the upstream side of an air filter such as a HEPA filter (high efficiency particulate air filter) arranged on the upstream side of the air conditioning equipment. The "HEPA filter" is an air filter having a particle collection rate of 99.97% or more and an initial pressure loss of 245 Pa or less with respect to particles having a particle size of 0.3 μm at a rated flow rate. Air filters do not require 100% particle collection efficiency. By providing the separation device 1 in the air purification system, it is possible to prevent fine particles such as PM2.5 from reaching the air filter. Therefore, in the air purification system, it is possible to extend the life of the air filter or the like located on the downstream side of the separation device 1. For example, in an air purification system, it is possible to suppress an increase in pressure loss due to an increase in the total mass of fine particles and the like collected by an air filter. This makes it possible to reduce the frequency of replacement of the air filter in the air purification system. The air purification system is not limited to a configuration in which the air filter and the air conditioning equipment are housed in different housings, and the air filter may be provided in the housing of the air conditioning equipment. In other words, the air conditioner may be equipped with an air filter in addition to the blower.

The separation device 1 according to the embodiment described above includes an outer cylinder body 2, a rotating body 3, a plurality of blades 36, and a motor 4. The outer cylinder 2 has a gas inlet 23 at the first end 21 and a gas outlet 24 at the second end 22. The rotating body 3 is arranged inside the outer cylinder body 2. The rotating body 3 is arranged so that its rotation center axis 30 is aligned with the center axis 20 of the outer cylinder body 2. The plurality of blades 36 are arranged apart from each other in the circumferential direction of the rotating body 3 between the rotating body 3 and the outer cylinder 2, and are provided integrally with the rotating body 3 of the rotating body 3 and the outer cylinder 2. Has been done. The motor 4 rotates the rotating body 3 in one direction around the rotation center axis 30. The outer cylinder 2 has a discharge hole 25 penetrating between the first end 21 and the second end 22 in the thickness direction of the outer cylinder 2. The discharge hole 25 has an elongated slit shape in a direction inclined with respect to a direction parallel to the rotation center axis 30. Here, in the discharge hole 25, in the rotation direction A1 of the rotating body 3, the portion formed at the second end 22 of the outer cylinder 2 is more than the portion formed at the first end 21 of the outer cylinder 2. Is also in the front position.

In the separation device 1 according to the embodiment, the rotating body 3 is rotated as compared with the case where the discharge hole is formed in a long slit shape in the direction along the central axis of the outer cylinder as in the separation device of Patent Document 1. By making the blades 36 rotate, the sound (wind noise) generated when the plurality of blades 36 are rotated can be reduced. That is, in the separation device 1 according to the embodiment, it is possible to suppress the generation of sound when the rotating body is rotated.

(Modified example of the embodiment)
The above embodiment is just one of various embodiments of the present invention. The embodiment can be changed in various ways depending on the design and the like as long as the object of the present invention can be achieved.

(Modification example 1)
In the separating device 1a according to the first modification of the embodiment, as shown in FIG. 8, the protruding directions of the plurality of blades 36 from the rotating body 3 are a plurality of protrusion directions from the rotating body 3 in the separating device 1 according to the first embodiment. It is different from the protruding direction of the blade 36. Further, in the separation device 1a according to the first modification of the embodiment, the rotation direction A1 of the rotating body 3 is opposite to the rotation direction A1 of the rotating body 3 in the separation device 1 according to the first embodiment. Since the basic configuration of the separation device 1a according to the first modification is the same as that of the separation device 1 according to the embodiment, illustration and description thereof will be omitted.

In the separating device 1a according to the first modification, each of the plurality of blades 36 has a predetermined angle with respect to one radial direction of the rotating body 3 when viewed from the inflow port 23 side in the direction along the central axis 20 of the outer cylinder 2. It is tilted by (for example, 45 degrees). Here, in each of the plurality of blades 36, the tip on the outer cylinder 2 side in the protruding direction from the rotating body 3 is located behind the base end on the rotating body 3 side in the rotating direction A1 of the rotating body 3. ing. That is, in the separating device 1a according to the first modification, each of the plurality of blades 36 is tilted by a predetermined angle (for example, 45 degrees) with respect to the one-diameter direction of the rotating body 3 in the rotating direction A1 of the rotating body 3. .. The predetermined angle is not limited to 45 degrees, and may be, for example, an angle in the range of 10 degrees to 80 degrees.

(Modification 2)
In the separation device 1 according to the second embodiment, the shape of the outer cylinder 2b is different from the shape of the outer cylinder 2 in the separation device 1 according to the first embodiment, as shown in FIG. Since the basic configuration of the separation device 1 according to the second modification is the same as that of the separation device 1 according to the embodiment, illustration and description thereof will be omitted.

In the separation device 1 according to the second modification, the discharge hole 25 of the outer cylinder 2b is formed along the circumferential direction of the outer cylinder 2b.

Further, the separation device 1 according to the modified example 2 has a plurality (10) discharge holes 25, and a plurality (2) discharge holes 25 are lined up in the circumferential direction of the outer cylinder 2b, and the outer cylinder A plurality (5) discharge holes 25 are arranged in a direction parallel to the central axis of the body 2b. The plurality of discharge holes 25 are arranged at substantially equal intervals in the circumferential direction of the outer cylinder 2b, but the present invention is not limited to this, and the plurality of discharge holes 25 may not be arranged at substantially equal intervals. Further, the plurality of discharge holes 25 are arranged at substantially equal intervals in the direction parallel to the central axis of the outer cylinder 2b, but the present invention is not limited to this, and the plurality of discharge holes 25 may not be arranged at substantially equal intervals.

(Other variants)
For example, in the separation device 1, not only when all of the discharge holes 25 are elongated slits in a direction inclined with respect to a direction parallel to the rotation center axis 30, for example, at least a part of the discharge holes 25 is It may have a slender slit shape in a direction inclined with respect to a direction parallel to the rotation center axis 30.

The discharge hole 25 is not limited to the case where the outer cylinder 2 is formed from the first end 21 to the second end 22. For example, the discharge hole 25 may be formed from the central portion of the outer cylinder 2 to the second end 22 in the direction along the central axis 20 of the outer cylinder 2, or the central axis of the outer cylinder 2. It may be formed from the first end 21 to the central portion in the direction along 20.

Further, in the separation device 1, the outer cylinder 2 has a plurality of discharge holes 25, but the number of the discharge holes 25 is not limited to a plurality, and may be one, for example.

Further, the plurality of discharge holes 25 are not limited to the case where they are arranged at equal intervals in the circumferential direction of the outer cylinder 2, and may be at unequal intervals.

For example, the material of the outer cylinder 2 is not limited to a synthetic resin such as ABS, but may be a metal or the like. Further, the material of the rotating body 3 and the plurality of blades 36 is not limited to a synthetic resin such as a polycarbonate resin, and may be, for example, a metal or the like. Further, the material of the rotating body 3 and the material of the plurality of blades 36 may be different from each other.

Each of the plurality of blades 36 may be formed as a separate member from the rotating body 3 and fixed to the rotating body 3 to be connected to the rotating body 3.

Further, each of the plurality of blades 36 may be formed in a spiral shape around the rotation center axis 30 of the rotating body 3. Here, the "spiral shape" is not limited to a spiral shape having a rotation speed of 1 or more, and also includes a part of a spiral shape having a rotation speed of 1.

The rotating body 3 is not limited to a configuration including two rotating members 3a and 3b arranged in a direction along the central axis 20 of the outer cylinder 2, and includes, for example, only one of the two rotating members 3a and 3b. It may be configured. Further, the rotating body 3 may include at least one rotating member (a rotating member having the same shape as the rotating member 3b) between the two rotating members 3a and 3b. In this case, it is preferable that the blade pieces forming a part of each of the plurality of blades 36 are also connected to the rotating member between the two rotating members 3a and 3b.

Further, the separation device 1 may further include a collector in which the solid discharged from the inside of the outer cylinder 2 through the discharge hole 25 enters.

The collector is provided on the outer cylinder 2 on the side opposite to the rotating body 3 side. The collector is arranged so as to cover the discharge hole 25 on the outside of the outer cylinder 2, for example. The collector is, for example, a container without a lid. In the separating device 1, a part of the solid in the air flowing in from the inflow port 23 of the outer cylinder 2 is discharged by the centrifugal force or the like while passing through the flow path 5 (see FIG. 3) while the rotating body 3 is rotating. Enter the collector through the hole 25.

(summary)
The following aspects are disclosed from the embodiments described above.

The separation device (1; 1a) according to the first aspect includes an outer cylinder body (2; 2b), a rotating body (3), a plurality of blades (36), and a motor (4). The outer cylinder (2; 2b) has a gas inlet (23) at the first end (21) and a gas outlet (24) at the second end (22). The rotating body (3) is arranged inside the outer cylinder body (2; 2b). The rotating body (3) is arranged so that its rotation central axis (30) is aligned with the central axis (20) of the outer cylinder body (2; 2b). The plurality of blades (36) are arranged apart from each other in the circumferential direction of the rotating body (3) between the rotating body (3) and the outer cylinder (2; 2b), and the rotating body (3) and the outer cylinder are arranged apart from each other. Of the body (2; 2b), it is provided integrally with the rotating body (3). The motor (4) rotates the rotating body (3) in one direction around the rotation center axis (30). The outer cylinder (2; 2b) has a discharge hole (25) penetrating between the first end (21) and the second end (22) in the thickness direction of the outer cylinder (2; 2b). .. At least a part of the discharge hole (25) has an elongated slit shape in a direction inclined with respect to a direction parallel to the rotation center axis (30).

The separation device (1; 1a) according to the first aspect can suppress the generation of sound when the rotating body (3) is rotated.

In the separation device (1; 1a) according to the second aspect, in the first aspect, at least a part of the discharge hole (25) is in a direction parallel to the rotation center axis (30) and the rotation of the rotating body (3). It has an elongated slit shape in the direction between the direction (A1).

In the separation device (1; 1a) according to the second aspect, the rotating body (3) is rotated as compared with the case where the discharge hole (25) is formed along the circumferential direction of the outer cylinder body (2b). It is possible to further suppress the generation of the sound at that time.

In the separation device (1; 1a) according to the third aspect, in the second aspect, the discharge hole (25) is spiral in a spiral direction along the rotation direction (A1) of the rotating body (3).

In the separation device (1; 1a) according to the third aspect, it is possible to further suppress the generation of sound when the rotating body (3) is rotated.

In the separation device (1; 1a) according to the fourth aspect, in the second or third aspect, the discharge hole (25) is formed from the first end (21) to the second end (22) of the outer cylinder body (2). It is formed over.

In the separation device (1; 1a) according to the fourth aspect, it is possible to improve the separation performance while suppressing the generation of sound when the rotating body (3) is rotated.

In the separation device (1; 1a) according to the fifth aspect, in any one of the second to fourth aspects, the outer cylinder (2; 2b) has a plurality of discharge holes (25). The plurality of discharge holes (25) are arranged in the circumferential direction of the outer cylinder body (2; 2b).

In the separation device (1; 1a) according to the fifth aspect, it is possible to improve the separation performance while suppressing the generation of sound when the rotating body (3) is rotated.

In the separation device (1; 1a) according to the sixth aspect, in the fifth aspect, the plurality of discharge holes (25) are arranged at equal intervals in the circumferential direction of the outer cylinder body (2; 2b).

In the separation device (1; 1a) according to the sixth aspect, it is possible to improve the separation performance while suppressing the generation of sound when the rotating body (3) is rotated.

In the separation device (1; 1a) according to the seventh aspect, in the fifth or sixth aspect, two discharge holes (25) adjacent to each other in the circumferential direction of the outer cylinder (2) among the plurality of discharge holes (25). ) Overlap in a direction parallel to the rotation center axis (30).

In the separating device (1; 1a) according to the seventh aspect, when the rotating body (3) is rotated, the rotating body (3) and the two adjacent blades (36) of the plurality of blades (36) are used. The fluctuation of the pressure in the space surrounded by the outer cylinder (2) becomes continuous and gradual, and it becomes possible to suppress the generation of sound.

In the separation device (1; 1a) according to the eighth aspect, in any one of the second to seventh aspects, the plurality of blades (36) are arranged at equal intervals in the rotation direction (A1). The distance between both ends of the discharge hole (25) in the direction along the rotation direction (A1) in the outer cylinder (2) is the rotation between two blades (36) adjacent to each other among the plurality of blades (36). It is an integral multiple of the maximum distance in the direction (A1).

In the separating device (1; 1a) according to the eighth aspect, when the rotating body (3) is rotated, the rotating body (3) and the two adjacent blades (36) of the plurality of blades (36) are used. The fluctuation of the pressure in the space surrounded by the outer cylinder (2) becomes continuous and gradual, and it becomes possible to suppress the generation of sound.

In the separating device (1a) according to the ninth aspect, in any one of the second to eighth aspects, the protruding direction of each of the plurality of blades (36) from the rotating body (3) is the rotating body (3). Tilt with respect to different radial directions. In each of the plurality of blades (36), the tip on the outer cylinder (2) side is located behind the base end on the rotating body (3) side in the direction along the rotation direction (A1).

In the separation device (1a) according to the ninth aspect, it is possible to improve the separation performance while suppressing the generation of sound when the rotating body (3) is rotated.

1, 1a Separator 2, 2b Outer cylinder 20 Central shaft 21 1st end 22 2nd end 23 Inflow port 24 Outlet 25 Outlet hole 3 Rotating body 30 Rotating central shaft 31 1st end 32 2nd end 36 Blade 4 Motor A1 direction of rotation

Claims (9)

An outer cylinder having a gas inlet at the first end and a gas outlet at the second end,
Inside the outer cylinder, a rotating body whose rotation center axis is arranged so as to be aligned with the center axis of the outer cylinder, and
A plurality of blades of the rotating body and the outer cylinder are arranged apart from each other in the circumferential direction of the rotating body, and are provided integrally with the rotating body among the rotating body and the outer cylinder. When,
A motor that rotates the rotating body in one direction around the rotation center axis, and
With
The outer cylinder has a discharge hole penetrating in the thickness direction of the outer cylinder between the first end and the second end.
At least a part of the discharge hole has an elongated slit shape in a direction inclined with respect to a direction parallel to the rotation center axis.
Separator. At least a part of the discharge hole has an elongated slit shape in a direction parallel to the rotation center axis and a direction between the rotation direction of the rotating body.
The separation device according to claim 1. The discharge hole is spiral in a spiral direction along the rotation direction of the rotating body.
The separation device according to claim 2. The discharge hole is formed from the first end to the second end of the outer cylinder.
The separation device according to claim 2 or 3. The outer cylinder has a plurality of the discharge holes, and the outer cylinder has a plurality of the discharge holes.
The plurality of discharge holes are arranged in the circumferential direction of the outer cylinder.
The separation device according to any one of claims 2 to 4. The plurality of discharge holes are arranged at equal intervals in the circumferential direction of the outer cylinder.
The separation device according to claim 5. Of the plurality of discharge holes, two discharge holes adjacent to each other in the circumferential direction of the outer cylinder body overlap in a direction parallel to the rotation center axis.
The separation device according to claim 5 or 6. The plurality of blades are arranged at equal angular intervals in the rotation direction.
The distance between both ends of the discharge hole in the direction along the rotation direction of the outer cylinder is an integral multiple of the maximum distance in the rotation direction between two blades adjacent to each other among the plurality of blades.
The separation device according to any one of claims 2 to 7. The protruding directions of the plurality of blades from the rotating body are inclined with respect to different radial directions of the rotating body.
In each of the plurality of blades, the tip on the outer cylinder side is located behind the base end on the rotating body side in the direction along the rotation direction.
The separation device according to any one of claims 2 to 8.

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