JP2020157296A - Cyclone separating device - Google Patents

Abstract

To provide a cyclone separating device, which can efficiently discharge a foreign matter separated by the device to the outside of the device without needing regular maintenance.SOLUTION: The cyclone separating device comprises: an inlet port 7 that can generate swirling airflow; an outlet port 9; a separating chamber 15 and a swirling chamber 14 respectively formed by a space partition plate 13 that partitions the inside of the device into an outer periphery side near the side of a main body and an inner periphery side including a center part of an enclosure; and a discharge port 12 through which the inside of the separating chamber is communicated with the outside of the enclosure. The discharge port 12 can be arranged at a position which is lower in a gravity direction with respect to the separating chamber 15, and the discharge port 12 is arranged at a tip part of a discharge accelerating surface 10 protruding from the side of the main body, so that even if natural wind is weak, foreign matters in the separating chamber can be efficiently exhausted, which can eliminate the necessity for regular maintenance.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cyclone separation device that separates foreign substances contained in air by 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 (hereinafter referred to as foreign substances) that are sucked in together with the outside air when the outside air is taken into the room. Is used.

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

Further, in Patent Document 2, a cyclone separation device is provided at an air supply port portion for taking in outdoor air in a house also provided with a ventilation device for supplying and exhausting air. It also has a separation chamber for storing the separated foreign matter. The separation chamber has a structure in which the lid opens 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 has become.

The structure is such that a baffle plate that receives the force of wind pressure is provided, and the baffle plate has a fulcrum at the top so that it moves like a pendulum by a certain amount of strong wind, and the baffle plate moves like a pendulum. Therefore, the two lids provided in the separation chamber are configured to open alternately.

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

In such a conventional cyclone separation device, when foreign matter is stored in the separation chamber as in Patent Document 1, it is necessary to perform maintenance of periodically removing the stored matter. Further, if a wind receiving plate is provided as in Patent Document 2 and the device moves like a pendulum by a certain amount of strong wind, the device becomes large and there are moving parts, so that regular maintenance is required. It was.

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a cyclone separation device having a discharge structure capable of efficiently discharging foreign substances separated by a cyclone without requiring regular maintenance. And.

Then, in order to achieve this object, the cyclone separation device according to the present invention is provided with an inflow port for inflowing air into the housing to generate a swirling airflow in the housing and an inflow port provided on the back side of the housing. A cylindrical inner cylinder having an outflow port that allows air flowing in from the housing to flow out of the housing, a swivel chamber that communicates with the inflow port on the front side of the housing, and a separation chamber that is located on the outer peripheral side of the swivel chamber. A space division plate that divides the space into two, a through hole that is provided in the space division plate and communicates the swivel chamber and the separation chamber, and a position below the gravity direction in the separation chamber with the central axis of the housing horizontally arranged. It is a cyclone separation device that is provided and has a discharge port that communicates between the separation chamber and the outside of the housing, and is used with a negative pressure inside. The discharge port has a slit shape having two long sides along the central axis and two short sides connecting the long sides, and is a discharge promotion unit installed on the side surface of the housing. It is formed at the tip. Further, the discharge promoting portion is formed so as to have an inclination inside and outside the housing at the lower part of the side surface of the housing, and in a cross section perpendicular to the central axis, a pair of discharge promoting portions spread in the left-right direction from the lower side in the gravity direction to the upper side. It has an emission promotion aspect, thereby achieving the intended purpose.

According to the present invention, by arranging the discharge port at a position below the separation chamber in the direction of gravity, foreign matter contained in the air is moved to the separation chamber side by the swirling airflow, and further inside the housing. By gravity, it can be moved downward along the slope to quickly collect foreign matter near the discharge port. In particular, by arranging the discharge port at the tip of the discharge promotion portion having an inclination inside and outside the housing at the lower part of the side surface of the housing, the natural wind collides with the inclination on the outside of the housing, and the outside of the discharge port. The wind becomes stronger and the static pressure on the outside becomes lower than the pressure on the side of the separation chamber, and the performance of discharging foreign matter in the separation chamber to the outside of the device can be improved.

A perspective view of the cyclone separator according to the first embodiment of the present invention as viewed from the diagonally lower front side. Same side sectional view Same plan sectional view The figure explaining the angle of the discharge promotion surface of the cyclone separation apparatus of Embodiment 1. A graph showing the test results of the examples of the first embodiment. Perspective view of the cyclone separator according to the second embodiment of the present invention as viewed from the diagonally lower front side. Enlarged cross-sectional view of the emission promotion section Graph showing the test results of the same example Perspective view of the cyclone separator according to the third embodiment of the present invention as viewed from the diagonally lower front side. Same side sectional view

The cyclone separation device according to the present invention has an inflow port capable of inflowing air into the housing to generate a swirling airflow, and an outlet provided on the back surface of the housing to allow air to flow out of the housing. A surface is formed on the front side of the housing, and the inside of the housing is divided into an outer peripheral side close to the side surface of the housing and an inner peripheral side including the central portion of the housing. The separated chamber and the swivel chamber, the space dividing plate, the communication hole for communicating the separation chamber and the swivel chamber, and the discharge port for communicating the inside of the separation chamber and the outside of the housing are provided, and the inside is negative. In a cyclone separation device used under pressure, the discharge port can be arranged at a position below the separation chamber in the direction of gravity, and a discharge promotion unit having an inclination inside and outside the housing at the lower part of the side surface of the housing. The discharge port is arranged at the tip of the discharge promotion unit, and the angle formed by the surface including the two long sides of the discharge port and the discharge promotion surface is defined as the angle D of the discharge promotion surface. The angle of the discharge promoting surface was set within the range of D = 30 to 80 degrees at the portion in contact with the surface including the two long sides.

As a result, the foreign matter separated in the separation chamber slides down along the inclination inside the housing and easily collects at the discharge port at the tip. In addition, on the outside of the housing, the wind blowing outdoors collides with the discharge promoting portion to generate an air flow along the slope. At the tip of the discharge promotion part, in addition to the natural wind, the airflow that collides with the discharge promotion part and flows along the slope joins, so that the wind speed becomes faster. Since there is no change in total pressure outside the outlet, as the wind speed increases outside the outlet, the dynamic pressure increases and the static pressure decreases (because according to Bernoulli's theorem, if the total pressure is constant, then This is because the static pressure decreases as the dynamic pressure increases). That is, when the static pressure on the outside of the housing is lower than the static pressure on the inside of the housing at the discharge port, the foreign matter in the separation chamber is attracted to the outside of the housing and discharged to the outside of the cyclone separation device.

As described above, by providing the discharge port at the tip of the discharge promotion part, the natural wind that collides with the discharge promotion part can be concentrated on the outside of the discharge port along the slope, and can flow outside the discharge port. Since the natural wind in the air can be made stronger than the surrounding natural wind, the effect of reducing the static pressure on the outside of the discharge port and the increased natural wind promote the discharge of foreign matter on the inside of the discharge port for efficiency. It can be discharged well.

In the cyclone separation device according to the present invention, the discharge port has an elongated slit shape from the front surface to the back surface of the housing, and the discharge promotion surface having an inclination on the outside of the discharge promotion portion is the length of the discharge port. The configuration may be such that the two sides on the side side are sandwiched between them so that they are symmetrically provided.

As a result, regardless of whether the natural wind blows from the right side or the left side of the discharge port, the effect of the discharge promotion unit for discharging the separated foreign matter in the separation chamber can be exerted in the same manner.

In the cyclone separation device according to the present invention, the discharge promoting surface is a plurality of surfaces having different inclination angles or curved surfaces in which the inclination angle changes continuously, and the angle D of the discharge promoting surface moves away from the side surface of the housing. The shape may be increased as the size increases.

As a result, the direction of the natural wind that collides with the discharge promoting surface can be gradually changed, so that the direction can be changed and directed toward the discharge port without reducing the energy of the wind. Since the wind energy is not weakened, the static pressure outside the outlet can be reduced to efficiently discharge foreign matter from the outlet.

The cyclone separation device according to the present invention may have a plurality of blade plates at the inflow port, and the blade plates may be arranged rotationally symmetrically around one axis.

As a result, a swirling airflow can be generated in the device, the foreign matter can swirl and give centrifugal force, the foreign matter can be moved to the outer peripheral side, and the foreign matter can be separated into the separation chamber. ..

In the cyclone separation device according to the present invention, the separation chamber is an annular shape surrounding the swivel chamber, and has a separation chamber bottom surface formed on the front side and a swivel chamber bottom surface formed on the front side in the swivel chamber. The relationship may be such that the bottom surface of the separation chamber and the bottom surface of the swivel chamber are located on substantially the same surface, and the separation chamber and the swivel chamber are communicated with each other by a through hole provided in the space dividing plate.

As a result, a swirling airflow is generated in the separation chamber in the same manner as the swirling chamber. Since the foreign matter flowing in from the discharge port swirls in the separation chamber due to the swirling airflow, it moves to the outer peripheral side in the separation chamber, and it is possible to suppress the foreign matter from flowing into the swirl chamber through the through hole. Further, by making the bottom surfaces of the swivel chamber and the separation chamber substantially the same surface, the thickness of the present device (thickness of the front surface and the back surface of the housing) can be suppressed, and the device can be miniaturized.

In the cyclone separation device according to the present invention, the inlet is provided on the back side where the outlet is provided on the side surface of the housing, the space dividing plate is provided on the front side, and the outlet is provided in the swirl chamber. The end portion of the inner cylinder tube may be extended to the inside of the space dividing plate in a side view so as to communicate with the protruding inner cylinder tube.

As a result, the traveling direction of the swirling airflow is directed toward the front side of the housing immediately after the inflow, the traveling direction is reversed by 180 degrees in the swirling chamber, and the flow is directed toward the outflow port through the inner cylinder tube. As a result, the foreign matter flowing in from the inflow port can be quickly moved to the front side while moving in the outer peripheral direction by the swirling airflow, so that the foreign matter can be suppressed from flowing into the outflow port of the present device. Separation performance can be improved.

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

(Embodiment 1)
FIGS. 1 to 3 show an example of using the cyclone separation device of the present embodiment.
The ventilation port hood 1 is attached to an air supply port which is an air intake port on the outer wall of the house when the outdoor air is taken into the house. For a device that takes in outdoor air into a house, a blower (not shown) is installed in the house, and a ventilation duct (not shown) is used to connect the blower and the ventilation port hood 1 to connect the ventilation port hood. Introduce the air that has passed through 1 into the room.

The ventilation port hood 1 is connected to the ventilation duct by using the outflow pipe 2, and is installed so as to project from the outer wall of the house.

Next, the appearance configuration of the housing 22 of the ventilation port hood 1 will be described.

The housing 22 of the ventilation port hood 1 is composed of a cover 3 on the front side and a base plate 4 on the back side as shown in FIG. The cover 3, which is the main part of the ventilation port hood 1, has a rotating body shape formed by rotating around the central axis 6, and has a cylindrical shape that closes the front side. That is, the cover 3 has a shape including the side surface of the ventilation port hood 1. Although the shape of the surface on the front side in FIG. 1 is flat, it may be a dome shape in which the central portion protrudes toward the front side.

The side surface of the cover 3 is provided with a projecting plate 5 in which the upper portion and the lower portion are projected toward the back surface side in the posture of FIG. 1 and further curved along the curved surface shape of the side surface of the cover 3.

The cover 3 and the base plate 4 are connected via a protruding plate 5. As a result, the gap provided on the side surface of the main body, which is also the side surface of the cover 3, becomes the inflow port 7 for allowing air to flow into the housing 22. The inflow port 7 can be configured to be in contact with the base plate 4 over 360 degrees on the side surface of the ventilation port hood 1. However, in the present embodiment, the protruding plate 5 portion is configured so that air does not flow in.

The inflow port 7 is provided with a plurality of fixed blades 8 arranged obliquely toward the central axis 6 so that the inflow air swirls. The fixing blades 8 are arranged at equal intervals rotationally symmetrically with respect to the central axis 6. Since air does not flow into the protruding plate 5, the fixing blades 8 are not arranged. Further, a net may be provided at the inflow port 7 (the outer peripheral portion of the fixed blade 8) so that large insects and birds do not invade the device.

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

A discharge promotion unit 11 is provided at the lower portion of the cover 3. The discharge promotion unit 11 has an inclination inside and outside. The inclination forms a discharge promoting surface 10 protruding from the side surface on the outside of the cover 3. Further, the inside of the cover 3 forms a guide surface 23.

The discharge promotion surface 10 has two symmetrically arranged surfaces, is connected to the other two surfaces, and constitutes the discharge promotion portion 11 from the tip portion 24 located at the lowermost portion. The discharge promoting portion 11 is provided with a discharge port 12 in which the discharge promoting surface 10 is inclined toward the lower portion in a direction in which the cross-sectional area becomes smaller, and the tip portion 24 is opened so as to communicate the inside and outside of the separation chamber 15. In the present embodiment, the cover 3 has a structure in which the discharge promoting portion 11 protrudes from the side surface of the cover 3 as a rotating body shape formed by rotating the cover 3 around the central axis 6, for example. When the lower side surface has an inclination as a rhombus shape, the side surface of the cover 3 can be used as it is as the discharge promoting surface 10.

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

As shown in FIG. 2, the internal space of the cover 3 is provided with an inflow port 7, an inner cylinder tube 19, and a space dividing plate 13 in the direction from the base plate 4 to the central axis 6.

As shown in FIG. 2, the space dividing plate 13 divides the internal space of the cover 3 into a swivel chamber 14 and a separation chamber 15. The space dividing plate 13 is inclined so that the cross section increases toward the base plate 4 side in the cover 3, and has a truncated cone shape. It may be a cylindrical shape in which the cross section does not change.

The inner peripheral side (inside the space dividing plate 13) including the central portion of the cover 3 is the swivel chamber 14, and the outer peripheral side (surrounded by the space dividing plate 13 and the cover 3) close to the side surface of the housing 22 inside the cover 3. The space) is a separation chamber 15. A through hole 16 is provided in the space dividing plate 13, and the swivel chamber 14 and the separation chamber 15 communicate with each other through the through hole 16.

The space dividing plate 13 forms a surface in the cover 3 on the front side of the ventilation port hood 1 to form a swivel chamber bottom surface 17, and the space dividing plate 13 and the swivel chamber bottom surface 17 are continuously configured. 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 the bottom surface 17 of the swivel chamber.

The space outside the space dividing plate 13 and surrounded by the cover 3 is the separation chamber 15, and the bottom surface 17 of the swivel chamber is substantially in close contact with the cover 3, so that the separation chamber 15 is an annular space. .. The separation chamber 15 may not be an annular space, but may be, for example, a space in which the cover 3 has a rectangular shape. The space dividing plate always has a rotating body shape 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. 1 to form a separation chamber bottom surface 18. The degree of closeness between the bottom surface 17 of the swivel chamber and the cover 3 is designed so that a slight gap is formed between the bottom surface 17 of the swivel chamber and the inner surface on 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 swivel chamber can be formed on substantially the same surface, so that the thickness of the cyclone separation device in the direction of the central axis 6, that is, the ventilation port hood 1 can be minimized. Can be done.

Further, the inner cylinder tube 19 is provided so as to project from the central portion of the base plate 4 to the inside of the cover 3, that is, toward the front side of the ventilation port hood 1, and is arranged coaxially with the outlet 9. In the present embodiment, in the base plate 4, the inner diameter of the inner cylinder pipe 19 is different from the inner diameter of the outflow pipe 2, and the inner diameter of the inner cylinder pipe 19 is smaller than the inner diameter of the outflow pipe 2. However, they may be the same size. Since the base plate 4 portion suddenly expands on the outflow pipe 2 side, if turbulence of the airflow is expected, the shape may be gradually expanded.

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

First, the outdoor air containing foreign matter flows into the ventilation port hood 1 from the inflow port 7 shown in FIG. 1, becomes a swirling air flow by the fixing blades 8, and moves toward the front side of the ventilation port hood 1 in the swirling chamber 14. Turn. Here, the foreign matter moves to the space dividing plate 13 side by centrifugal force, and moves into the separation chamber 15 when passing near the through hole 16. The air separated from the foreign matter flows into the inner cylinder pipe 19, passes through the outflow pipe 2, and flows out of the device from the outflow port 9.

The foreign matter that has moved to the separation chamber 15 is temporarily stored in the separation chamber 15. Since the pressure inside the ventilation port hood 1 is negative due to 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. 2, flows into the swirling chamber 14, and merges with the swirling airflow in the swirling chamber 14.

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

FIG. 3 is a cross-sectional view of the cover 3 shown in FIG. 1 as viewed from the back surface side (including the discharge promotion unit 11). The white arrows in FIG. 3 represent the flow of airflow. As shown in FIG. 3, the air inside the separation chamber 15 is swirling in the same direction as the inside of the swirl chamber 14 as a whole due to the influence of the swirling airflow inside the swirl chamber 14 (all airflows are in the same direction). Not necessarily). Therefore, the foreign matter in the separation chamber 15 also moves due to the influence of the flow.

As shown in FIG. 3, the upper portion of the discharge promoting portion 11 extends in the left-right direction with respect to the lower portion. Similarly, on the inner side, the upper part of the guide surface 23 extends in the left-right direction with respect to the lower part.

Foreign matter carried by the swirling airflow easily flows into the discharge promotion unit 11. Further, by providing a width in the direction of the central axis 6, the swirling airflow flowing in the separation chamber 15 crosses the discharge promotion unit 11, and when a foreign substance moves, it easily flows into the discharge promotion unit 11. It has become. The length in the central axis 6 direction may be extended to the same as the length in the central axis 6 direction of the separation chamber 15.

The discharge port 12 is a lower portion of the discharge promotion unit 11 and has a rectangular shape long in the central axis 6 direction.

The elongated shape is used to increase the area so that large insects and birds can easily discharge it without invading it. Further, the reason why the discharge port 12 is lengthened in the direction of the central axis 6 is to enhance the discharge effect by the natural wind, and the details will be described later.

Since the inside of the cover 3 has a negative pressure, an air flow also flows in from the discharge port 12. It is preferable to provide the guide member 20 so that the inflowing airflow flows in the same direction as the swirling airflow. Even if the foreign matter tries to fall from the discharge port 12 due to its weight, it is pushed back by the inflow airflow, so that the foreign matter usually hardly goes out of the housing 22 from the discharge port 12.

However, since the total pressure does not change outside the discharge port 12, when a natural wind (crosswind) blows, the dynamic pressure increases and the static pressure increases when the wind speed increases outside the housing 22, that is, outside the discharge port. (Because according to Bernoulli's theorem, when the total pressure is constant, the static pressure decreases as the dynamic pressure increases). That is, when the static pressure decreases, the airflow flowing in from the discharge port 12 weakens, so that the downward force due to the weight of the foreign matter prevails, and the attraction effect due to the decrease in the static pressure outside the discharge port 12 causes the airflow to move downward from the discharge port 12. By popping out, foreign matter inside the discharge port 12 is discharged.

Since the cyclone separation device of the present embodiment is installed on the outer wall of the house as the ventilation port hood 1, there is a wall surface on the back side of the device. Therefore, the natural wind does not easily flow in the direction of the central axis 6 and easily flows along the outer wall of the house. That is, it often flows in the left-right direction in the front view of FIG.

To shorten the passage time of the wind passing through the outside of the discharge port 12 (to shorten the time for the crosswind to be sucked into the device at the discharge port 12, suppress the suction, and enhance the discharge effect). The width of the discharge port 12 is narrowed in the left-right direction. Therefore, the shape of the discharge port 12 is a rectangular shape that is long in the direction of the central axis 6.

In order to promote the discharge, it is better that the wind speed of the wind passing through the outside of the discharge port 12 is high. As in the present embodiment, the discharge promoting portion 11 is projected from the side surface of the main body, and the discharge promoting surface 10 is provided so as to sandwich the two longer sides of the discharge port 12 so as to sandwich the discharge promoting surface 10. At the tip 24 (outside of the discharge port 12) of the promotion unit 11, in addition to the natural wind, the airflow that collides with the discharge promotion unit 11 and flows along the discharge promotion surface 10 merges, so that the wind speed becomes faster (FIG. 3). The black arrow in represents the image of a crosswind).

When the wind speed is increased outside the discharge port 12, the static pressure outside the discharge port 12 can be further reduced, so that the foreign matter inside the discharge port 12 is discharged to the outside.

In addition, since air is viscous, when there is a flow of wind, the surrounding air is also affected and the air moves. Due to this attraction effect, the wind speed increases outside the discharge port 12, so that the air inside the discharge port 12 is also affected by the air flow with a high wind speed outside, and the effect of pulling out is obtained. Foreign matter is discharged to the outside on the airflow attracted to the outside.

Compared with the case where the discharge port 12 is simply provided at the lower part of the side surface of the main body, in the present embodiment, the discharge performance is remarkably improved by these actions, and even when the natural wind is weak, the inside of the separation chamber 15 is provided. It is possible to discharge more foreign matter.

The discharge promotion surface 10 has two surfaces on both sides of the discharge port 12, and they have a symmetrical structure. This is to obtain the same emission promotion effect regardless of whether the natural wind blows from the left or right. It should be noted that the discharge promoting surface 10 having an inclination on both the left and right sides is required, but the structure may not be strictly symmetrical and the angle may be slightly different.

In order to represent the angle of the discharge promoting surface 10, as shown in FIG. 4, it is represented by the angle D with respect to the surface 25 including the two long sides of the discharge port 12. There is an appropriate angle for this angle D. If it is substantially perpendicular to the surface including the discharge port 12 (D = 90 degrees), the natural wind will collide and lose momentum, and if D = 0 degrees, it is meaningless.

The end of the discharge promotion surface 10 in contact with the surface 25 including the two long sides of the discharge port 12 has a fillet with rounded corners depending on the thickness of the plate forming the discharge promotion surface 10. Chamfering may be performed to remove the corners. At this time, the discharge promoting surface 10 represents up to the start position of the fillet or the like. That is, the angle D of the discharge promotion surface 10 gradually increases from the side surface side of the cover 3, but the point where the angle D decreases is the start position of the fillet or the like, and the discharge promotion surface 10 is up to that point.

In the present embodiment, since the cover 3 has a cylindrical shape, the natural wind that collides with the side surface of the cover 3 reaches the discharge promoting surface 10 along the cylindrical surface, so that more airflow is collected at the discharge port 12. The wind speed of the 12 parts of the discharge port is further increased, so that the discharge performance is further improved.

In this way, the separated foreign matter is efficiently discharged by the natural wind, so that regular maintenance of removing the foreign matter becomes unnecessary.

[Example]
<Comparison test of the angle of the discharge promotion surface (cover shape: cylindrical shape)>
The following test was conducted to confirm the relationship between the discharge performance of the angle D of the discharge promotion surface 10.

A 10-minute discharge rate was defined to indicate how much the separated foreign matter was discharged, and the following comparative test was conducted to see the effect of the discharge promotion unit 11. That is, the discharge rate [%] for 10 minutes = E / M × 100 (however, the amount E [g] discharged from the discharge port 12 in 10 minutes, and the specified amount M [g] of the foreign matter charged into the separation chamber 15 ).

As a test method for the 10-minute discharge rate, a specified amount of foreign matter (in this test, φ1 mm foam beads are used) is charged into the separation chamber 15 in advance, and the cyclone separation device of the present embodiment is specified. After flowing the air volume, a cross wind is applied to the cyclone separation device of the present embodiment so as to have a constant wind speed from the side, and the amount E [g] discharged from the discharge port 12 is measured in 10 minutes. Then, it is calculated by the above formula from the amount E [g] discharged from the discharge port 12 in 10 minutes.

The comparative test was carried out in the following three patterns. The angle of the discharge promoting surface 10 is an angle with respect to the surface of the discharge port 12 as described above.

The configuration other than the discharge port 12 promotion unit is the same in all three cases. The test conditions were an air volume of 300 [m ^{3 /} h] and M = 1.0 [g] of this device.

(Example 1)
The discharge promotion unit 11 was provided, and the angle of the discharge promotion surface 10 was set to D = 49 degrees.

(Example 2)
The discharge promotion unit 11 was provided, and the angle of the discharge promotion surface 10 was set to D = 30 degrees.

(Comparative Example 1)
The discharge promotion unit 11 is not provided, and the discharge port 12 is provided at the lower part of the side surface of the main body (D = 0 degrees).

<Comparison result>
The results are shown in FIG. The horizontal axis of the graph represents the wind speed of the crosswind, and the discharge rate increases for 10 minutes as the wind speed increases, but in Comparative Example 1, 0.5 [m / s] or less is 0 [%]. Compared to 0.1 [%] at 2.0 [m / s] and 0.5 [%] at 2.5 [m / s], the product of the present invention is firmer even at lower wind speeds than the comparative example. It can be discharged.

Further, in the first and second embodiments, the first embodiment has a higher emission rate and therefore has better performance. From this result, it can be said that the angle D of the discharge promoting surface 10 should be large to some extent. It can be said that the actual usage condition is preferably D = 30 to 80 degrees, more preferably around 50 degrees.

The length of the discharge promoting surface 10 in the height direction (direction perpendicular to the surface of the discharge port 12) is preferably long, but at least twice the length of the short side of the discharge port 12. In this example, it is 2.5 times.

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

As shown in FIG. 6, in the present embodiment, the shape of the cover 3 is a rectangular parallelepiped shape. In order to fix the cover 3, the base plate 4 is also made square, and the base plate 4 and the cover 3 are fixed by four L-shaped pillars 21 at the corners of the base plate 4 instead of the protruding plate 5 of the first embodiment. are doing. Other configurations are the same as those in the first embodiment.

An inflow port 7 is opened between the two L-shaped columns 21. A net may be provided on the outer periphery of the fixing blade 8 or at least one of the inflow ports 7 so that large insects and birds do not invade the device.

Also in the present embodiment, the discharge port 12 is located below the discharge promotion unit 11 and is sandwiched between the two discharge promotion surfaces 10. One of the four sides of the cover 3 was arranged so as to come to the lower part, and the discharge port 12 was provided near the center of the side surface. The position of the discharge port 12 is not limited to the vicinity of the center, and may be shifted to either the left or right side.

FIG. 7 is a cross-sectional view of the discharge promotion unit 11 according to the present embodiment. In the present embodiment, the discharge promoting surface 10 has a continuously changed inclination angle. The angle of the discharge promoting surface 10 is preferably changed in the range of D = 20 to 80 degrees, and in the present embodiment, it is changed in the range of D = 30 to 75 degrees. The inclined surface on the side in contact with the side surface of the cover 3 is D = 30 degrees, and the inclined surface on the side in contact with the discharge port 12 is D = 75 degrees.

In the discharge mechanism, the natural wind collides with the discharge promoting surface 10 and heads toward the discharge port 12 along the inclined surface, and the original natural wind and the air flow flowing along the slope of the discharge promoting surface 10 are generated near the discharge port 12. When the wind merges and the wind speed becomes faster than the wind speed of the surrounding natural wind in the vicinity of the discharge port 12, the static pressure decreases outside the discharge port 12 and the discharge of foreign matter is promoted.

In the present embodiment, since the angle D of the discharge promoting surface 10 gradually increases as the distance from the side surface increases, the natural wind can smoothly change its direction. That is, it is possible to change the airflow to have a directivity diagonally downward on the outside of the discharge port 12 without weakening the momentum of the natural wind. As a result, the airflow outside the discharge port 12 becomes stronger, so that the foreign matter discharge performance can be further improved. The discharge promoting surface 10 may be a combination of a plurality of surfaces having different angles. In that case, the angle D of the discharge promoting surface 10 may be gradually increased from the side surface of the cover 3 toward the discharge port 12. For example, suppose that three surfaces with different angles are used to form an discharge promoting surface, the surface in contact with the cover 3 is D = 30 degrees, the intermediate surface is D = 50 degrees, and the surface in contact with the discharge port 12 is D = 75 degrees. With the above configuration, the discharge performance can be improved as described above.

If, in the present embodiment, the discharge promotion unit 11 is not provided and only the hole serving as the discharge port 12 is formed on one of the four side surfaces of the cover 3 at the bottom, the natural wind blows to the left and right of the cover 3. Since it collides with the side surface of the wind and the left and right sides are perpendicular to the crosswind, the natural wind that collides with this side loses its momentum. That is, on the outside of the discharge port 12, only the natural wind flowing along the lower surface contributes to the discharge of the foreign matter, so that the foreign matter does not start to be discharged unless the natural wind itself blows considerably strongly.

However, if the discharge promotion unit 11 is provided as in the present invention, the wind speed can be partially increased outside the discharge port 12, and the static pressure can be reduced, so that the natural wind is utilized inside the discharge promotion unit 11. Since the foreign matter can be attracted from the discharge port 12, the foreign matter separated inside the housing 22 can be easily discharged.

A decorative plate covering the discharge promoting portion 11 may be provided on the front surface of the main body so that the discharge promoting portion 11 cannot be seen from the front side. At that time, the surface on the front side constituting the discharge promotion unit 11 may also serve as the surface of the decorative plate.

Further, the discharge promoting surface 10 having a changed angle exerts its effect regardless of whether the cover 3 has a square shape as in the present embodiment or a round shape as in the first embodiment.

[Example]
<Comparison test of the angle of the discharge promotion surface (cover shape: square shape)>
In the case where the cover 3 has a square shape, the discharge performance when the angle D is changed is compared. As the test method of the discharge performance, the 10-minute discharge rate shown in the example of the first embodiment was used.

The angle of the discharge promotion surface was not changed, only one angle was used, and the following four patterns were used.

The configuration other than the discharge port 12 promotion unit is the same in all four cases. The test conditions were the same as in the first embodiment, and the air volume of this device was 300 [m ^{3 /} h] and M = 1.0 [g].

(Comparative Example 1)
The angle of the discharge promoting surface 10 was set to D = 30 degrees.

(Comparative Example 2)
The angle of the discharge promoting surface 10 was set to D = 45 degrees.

(Comparative Example 3)
The angle of the discharge promoting surface 10 was set to D = 60 degrees.

(Comparative Example 4)
The angle of the discharge promoting surface 10 was set to D = 75 degrees.

<Comparison result>
The results are shown in FIG. The horizontal axis of the graph represents the wind speed of the crosswind, and at D = 30 degrees in Comparative Example 1, the emission rate for 10 minutes is higher than that of the other Comparative Examples within the range of the wind speed of 1.0 to 2.0 [m / s]. Was a low value.

In the range of wind speed of 1.0 to 1.5 [m / s], the larger the angle D of the discharge promoting surface 10, the better the discharge rate for 10 minutes.

At a wind speed of 2.0 [m / s], D = 45 and 60 degrees in Comparative Examples 2 and 3 were the best, and when D = 75 degrees in Comparative Example 4, the wind speed tended to decrease.

From this, when the wind speed is low (1.0 to 1.5 [m / s]), even if the angle D is large, the airflow is less turbulent, the wind speed near the discharge port can be accelerated, and the discharge rate can be increased for 10 minutes. It seems that the value was high. When the wind speed is high (2.0 [m / s]) and the angle D is large, the airflow is turbulent and the wind speed is not sufficiently increased near the discharge port, so that the discharge rate is considered to have decreased for 10 minutes.

(Example 3)
From such a consideration, the angle D is gradually increased as shown in the second embodiment so that the discharge rate increases for 10 minutes regardless of whether the wind speed is weak or strong. The third embodiment is shown below.

The discharge promoting surface 10 is composed of three surfaces having different angles D, the surface in contact with the cover 3 is D = 30 degrees, the intermediate surface is D = 45 degrees, and the surface in contact with the discharge port 12 is D = 75. The test was conducted in the same manner as the above comparative test. The results are shown in FIG.

In the embodiment of the present embodiment, the discharge rate was higher for 10 minutes than in the comparative example of the above four patterns in the entire range of the wind speed of 1.0 to 2.0 [m / s] (excellent result). T). From this, it is considered that the discharge rate was improved for 10 minutes in the entire range because the airflow was not turbulent in the vicinity of the discharge port 12 and the wind speed was sufficiently increased regardless of whether the crosswind was small or large.

(Embodiment 3)
The cyclone separation device using the ventilation port hood 1 of the first and second embodiments as an example is a reversing type in which the traveling direction of the swirling flow is reversed. This embodiment describes an example of an axial flow type cyclone separation device in which the traveling direction of the swirling flow does not change.

FIG. 9 shows an external view. The main body of the cyclone separation device 26 is covered with a cylindrical cover 3, and an opening is provided in the center of the bottom surface on the front side, and this is the inflow port 7. A discharge promoting portion 11 is provided at the lower portion of the side surface of the main body, and a discharge port 12 for discharging foreign matter to the outside of the device is provided at the lower portion.

An outflow pipe 2 is provided on the bottom surface of the cylindrical shape on the back side.

FIG. 11 is a cross-sectional view of the present embodiment. Fixed blades 8 are arranged in a plurality of circular shapes in the vicinity of the inflow port 7, each fixed blade 8 is inclined, and the airflow passing through the fixed blades 8 becomes a swirling airflow.

A space dividing plate 13 is provided on the outer peripheral portion of the fixed blade 8 parallel to the side surface of the main body and at intervals, and the space sandwiched between the space dividing plate 13 and the fixed blade 8 is the remaining in the swivel chamber 14 and the cover 3. The space of is a separation chamber 15.

In the cross-sectional view of FIG. 10, the space dividing plate 13 may be further extended toward the back surface side, the outflow pipe 2 may be further extended inside the main body, and the end portion thereof may be extended to the inside of the space dividing plate 13. This makes it difficult for foreign matter moving to the outer peripheral side to flow into the outflow pipe 2, and the separation performance is improved.

The air flowing in from the inflow port 7 becomes a swirling airflow by the fixed blades 8 and passes through the swirling chamber 14. After that, it passes through the separation chamber 15, passes through the outflow pipe 2, and flows out of the device from the outflow port 9.

The foreign matter that has flowed in together with the air moves to the space dividing plate 13 side due to centrifugal force, and after the space dividing plate 13 is interrupted, moves to the outer peripheral side in the separation chamber 15, that is, the cover 3 side, and continues to rotate.
Similar to the first and second embodiments, the discharge promotion unit 11 has an elongated slit shape from the front side to the back side of the cover 3 shown in FIG. 6, and sandwiches two sides of the long side of the discharge port 12. The discharge promotion surface 10 is provided symmetrically on the left and right sides, and the discharge promotion surface 10 is inclined so as to spread toward the inside of the main body. The discharge promotion unit 11 is composed of a surface including the discharge port 12, two surfaces of the discharge promotion surface 10 and the remaining two surfaces, and the remaining two surfaces are different from FIG. 11 even if they are inclined as shown in FIG. It may be vertical.

Since the discharge promotion unit 11 has an opening wider than the discharge port 12, foreign matter moving in the separation chamber 15 is likely to collect in the discharge promotion unit 11 due to the wide opening. The foreign matter in the discharge promoting unit 11 is smoothly discharged by the action of the air flow flowing outside the discharge port 12 described in the first embodiment.

The cyclone separation device according to the present invention can quickly collect foreign matter in the vicinity of the discharge port, and the natural wind collides with the inclined surface protruding from the side surface of the housing, so that the foreign matter in the separation chamber is discharged to the outside of the device. Therefore, it is useful as a ventilation port hood or the like used for the air supply port portion of the outer wall of the house that takes in the outdoor air by ventilation in the house.

1 Ventilation port hood 2 Outflow pipe 3 Cover 4 Base plate 5 Protruding plate 6 Central axis 7 Inflow port 8 Fixed blade 9 Outlet 10 Discharge promotion surface 11 Discharge promotion part 12 Discharge port 13 Space division plate 14 Swing chamber 15 Separation chamber 16 Penetration Hole 17 Bottom of swivel chamber 18 Bottom of separation chamber 19 Inner tube 20 Guide member 21 L-shaped pillar 22 Housing 23 Guide surface 24 Tip 25 Surface including two long sides 26 Cyclone separation device

Claims (3)

An inflow port that allows air to flow into the housing and generate a swirling airflow inside the housing,
A cylindrical inner cylinder tube provided on the back side of the housing and having an outlet for allowing air flowing in from the inflow port to flow out of the housing.
On the front side of the housing, a space dividing plate that separates a swivel chamber that communicates with the inflow port and a separation chamber that is located on the outer peripheral side of the swivel chamber.
A through hole provided in the space dividing plate and communicating the swivel chamber and the separation chamber,
With the central axis of the housing arranged horizontally, a discharge port provided at a position lower in the direction of gravity in the separation chamber and communicating the separation chamber with the outside of the housing,
It is a cyclone separation device that is equipped with a negative pressure inside and is used.
The discharge port has a slit shape having two long sides along the central axis and two short sides connecting the long sides, and is installed on the side surface of the housing to promote discharge. It is formed at the tip of the part,
The discharge promoting portion is configured to have an inclination inside and outside the housing at the lower part of the side surface of the housing, and spreads in the left-right direction from the lower side in the gravity direction to the upper side in a cross section perpendicular to the central axis. A cyclone separating device characterized by having a pair of emission promoting surfaces. The cyclone separation device according to claim 1, wherein the discharge promoting surface is a plurality of surfaces having different inclination angles or a curved surface whose inclination angle changes continuously. The claim is characterized in that the discharge promotion unit is configured such that the surface including one of the short sides of the discharge port is perpendicular to the surface including the two long sides of the discharge port. Item 2. The cyclone separator according to item 1 or 2.