JP4734570B2 - Cyclone separation device and residential air supply hood using the same - Google Patents

Description

  The present invention relates to a cyclone separator having a small axial dimension and a small dust separation efficiency, and an air supply hood for residential ventilation using the cyclone separator.

  As shown in FIG. 10, a conventional cyclone separating apparatus is a double cylinder comprising a cyclone outer cylinder whose upper part is cylindrical and whose lower part is a mortar, and a thin cylindrical cyclone inner cylinder arranged concentrically with the outer cylinder. It has a structure. In this cyclone separator, air flows in from the circumferential direction of the upper part of the cyclone outer cylinder and descends while centrifugally separating the dust as a swirling flow in the cyclone space between the inner and outer cylinders, but the flow is reversed at the lower part of the cyclone space. Then, it flows in from the inlet of the inner cylinder, rises in the inner cylinder, and flows out from the upper part of the cyclone cylinder.

  At this time, in order to improve the separation performance, the axial length of the cyclone cylinder is required to some extent, and therefore downsizing of the cyclone separation device is a difficult task. In addition, the large axial length of the cyclone cylinder and the double cylindrical structure increase the flow path area, that is, the area of the wall surface between the inner and outer cylinders forming the cyclone space and the wall surface inside the inner cylinder. This is a cause of friction loss. Further, when the swirling descending flow generated in the cyclone space is reversed and flows into the inner cylinder, a large pressure loss is generated here due to large deformation and contraction of the streamline. Therefore, in the conventional cyclone separator, it is difficult to achieve both high separation performance and low pressure loss.

Therefore, as an axial flow cyclone separator that can reduce the pressure loss without reversing the flow in the cyclone space, an apparatus shown in Patent Document 1 below is disclosed.
JP 2001-259479 A JP 2005-127560 A

  Since the apparatus of Patent Document 1 is premised on being installed in the middle of a pipe or duct, there is an inflow cylinder in the cyclone cylinder suction port, and there is a free vortex positive flow plate in the cyclone space. Because of the presence of the column, the length of the cyclone cylinder in the axial direction cannot be shortened, and the size has not been sufficiently reduced.

  In general, suction-type cyclone separators have a lower pressure in the cyclone space than the outside air, so if there is a hole communicating with the outside air other than the cyclone cylinder inlet, the outside air will flow in from there and the separation performance Cause a decline. Therefore, during the operation of the cyclone separator, the dust storage chamber needs to be sealed against the outside air, and it is difficult to remove the dust stored in the dust storage chamber while operating the device. Therefore, generally, when removing dust, the operation of the cyclone separator is temporarily stopped.

  On the other hand, in a residential 24-hour ventilation system that forcibly takes outside air into the room, an air purification filter is often installed on the air supply side of the blower body in order to remove dust, insects, and the like contained in the outside air. . In order to maintain the effect of the filter and prevent an increase in pressure loss due to contamination, maintenance work such as periodic cleaning and replacement of the filter is indispensable. However, at present, there are very few users who clean / replace the filter at an appropriate frequency due to the troublesomeness of replacing the filter and the aversion to dirty filters. There are many.

  In general, an air supply hood is attached to the air supply port of the house to prevent rain, snow, birds, large insects, etc. from entering the air supply port. The burden is reduced and the frequency of necessary maintenance work can be reduced. However, if this air purification function requires maintenance such as cleaning the air supply hood itself, it will not solve the troublesome maintenance, and the air supply port is generally installed at a high place. Therefore, maintenance work by a general user is virtually impossible, and a big problem occurs.

  Furthermore, an increase in pressure loss due to the addition of an air purification function must be avoided from the viewpoint of energy saving, and the supply hood must be small due to installation restrictions such as eaves and window frames. . Providing the air hood with an air purification function in this way is effective in reducing the maintenance cost of residential ventilation equipment, but a maintenance-free, low pressure loss and small air supply hood with an air purification function. The actual situation was not provided.

  Although what was shown to the said patent document 2 is disclosed as what applied such a conventional cyclone separation apparatus to a house, it is only what applied the conventional large cyclone apparatus as it is, and it is small and has separation performance. The fact that a cyclone separator is applied to a good residential air supply system has not been provided so far.

  The present invention has been made in view of the above circumstances, shortening the axial length of the cyclone cylinder, reducing the size and improving the installation property, and at the same time achieving both high separation performance and low pressure loss, It is a first object of the present invention to provide a cyclone separation device capable of discharging stored dust even during operation of the device. Another object of the present invention is to provide a maintenance-free housing ventilation air supply hood with an air purification function and an automatic dust discharge function by incorporating this into the housing ventilation air supply hood.

In order to achieve the above object, a cyclone separator according to the present invention is a cyclone separator having a cyclone chamber having an intake port at one end in the axial direction and an exhaust port at the other end,
The intake port is formed as an annular region around the intake air blocking region by providing an intake air blocking region that blocks intake air to the cyclone chamber in a predetermined region near the shaft center, while the exhaust port is formed as the intake air blocking region Formed as a region near the axial center facing
In the intake port formed as the annular region, inclined blade members for allowing a vortex to flow into the cyclone chamber are arranged in the circumferential direction, and the intake blocking region is 50% or more in size of the exhaust port. is set to,
The axis of the cyclone chamber is horizontal,
In the lower part of the cyclone chamber, a dust storage chamber for storing the dust separated in the cyclone chamber is provided over the entire axial length of the cyclone chamber,
The gist of the present invention is that a slit-like dust drop opening is formed at the lowest part of the wall surface of the cyclone chamber and extends over the entire length of the cyclone chamber in the axial direction .

In order to achieve the above object, the air supply hood for house ventilation according to the present invention is an air supply hood for house ventilation for taking in outside air for air supply for internal ventilation of the house,
A cyclone chamber having an intake port at one end in the axial direction and an exhaust port at the other end is provided. The intake port is provided with an intake air blocking region that blocks intake air to the cyclone chamber in a predetermined region near the axial center. The exhaust port is formed as a region in the vicinity of the axial center facing the intake blocking region, and the intake port formed as the annular region is vortexed into the cyclone chamber. Inclined blade members for inflowing are arranged so as to be arranged in the circumferential direction, and the intake air blocking region includes a cyclone separator set to a size of 50% or more of the exhaust port ,
The axis of the cyclone chamber is horizontal,
In the lower part of the cyclone chamber, a dust storage chamber for storing the dust separated in the cyclone chamber is provided over the entire axial length of the cyclone chamber,
The gist of the present invention is that a slit-like dust drop opening is formed at the lowest part of the wall surface of the cyclone chamber and extends over the entire length of the cyclone chamber in the axial direction .

That is, according to the present invention, the intake port is formed as an annular region around the intake block region by providing an intake block region that blocks intake to the cyclone chamber in a predetermined region near the shaft center. Since the inclined blade members for allowing the vortex to flow into the cyclone chamber are arranged in the circumferential direction at the intake port, the vortex is effectively generated by a structure having a very short axial dimension. A vortex can be introduced into the cyclone chamber from the annular inlet. Then, by forming the exhaust port as a region near the axial center facing the intake air blocking region, the vortex flow is introduced from the annular intake port, so that no vortex flows near the axial center of the cyclone chamber, Since the vortex can be introduced in the vicinity of the side wall for separating the vortex, the vortex flowing from the annular intake port effectively hits the side wall of the cyclone chamber and the dust is effectively separated. Moreover, since a conventional cyclone inner cylinder is not required, the friction loss generated in the cyclone cylinder is small, and the flow that flows in from the intake port flows in one direction along the axis without being inverted in the axial direction and is discharged. In addition, since the axial length of the cyclone chamber itself can be greatly reduced, the pressure loss is also greatly reduced. With such a structure, the cyclone separation device can be reduced in size by greatly reducing the axial length of the cyclone chamber itself, and has high dust separation efficiency and low pressure loss. In addition, since the intake air blocking area is set to be 50% or more of the size of the exhaust port 5, it is possible to prevent the vortex flow from being sucked into an area close to the exhaust port in the cyclone cylinder and to sufficiently remove dust by centrifugation. It is possible to prevent the intake air that has not been discharged from being discharged from the exhaust port, and to ensure sufficient separation efficiency.
Further, the axis of the cyclone chamber is horizontal, and a dust storage chamber for storing dust separated in the cyclone chamber is provided over the entire length in the axial direction of the cyclone chamber at the lower part of the cyclone chamber. A slit-shaped dust drop opening is formed at the bottom of the cyclone chamber over the entire length in the axial direction, so that dust that has fallen and separated by friction with the peripheral wall in the cyclone chamber is separated from the dust drop opening by gravity. Drop into the containment chamber.

In the present invention, when the vicinity of the opening on the cyclone chamber side of the exhaust port is configured to protrude to the cyclone chamber side,
When the vortex flow in the cyclone chamber is exhausted from the exhaust port, the exhaust gas gets over the protruding part and is discharged to the outside. Thus, the separation efficiency can be improved.

In the present invention, when a cylindrical intake duct is disposed on the inner periphery and the outer periphery of the intake port formed as the annular region,
Due to the presence of the intake duct, the airflow near the intake port is guided to the intake port without escaping to any part other than the intake port. The dust is more effectively separated upon hitting.

In the present invention, the upper Symbol dust accommodating chamber is provided with a plurality of dust discharge valve arranged in the vertical direction, at least one of the plurality of dust discharge valve is configured so as not to open at the same time as the other dust discharge valve If you have
Dust discharged by opening the upper dust discharge valve is received and temporarily held by the lower dust discharge valve, discharged by opening the lower dust discharge valve, and sequentially discharged from top to bottom. Is done. At this time, since at least one of the dust discharge valves does not open simultaneously with the other dust discharge valves, the dust once dropped is discharged without flowing back into the cyclone chamber. In this manner, maintenance-free operation can be performed without performing complicated operations such as filter replacement.

  In the present invention, when the intake air blocking region is formed to be the same as or wider than the exhaust port, the vortex flow in the cyclone chamber from which dust is separated is discharged from the exhaust port smaller than the intake air blocking region of the intake port. Further, it is possible to prevent dust from being discharged to the outside due to the momentum of the exhaust discharged from the exhaust port, and the separation efficiency is increased.

  In the present invention, when the internal space of the cyclone cylinder in which the annular intake port and the exhaust port are formed is a cavity, there is no member that obstructs the flow of the airflow inside the cyclone cylinder. Minimal loss.

In the present invention, the upper Symbol dust accommodating chamber, dust discharge valve is provided arranged in the vertical direction,
One dust discharge valve is opened by movement in one direction of the wind receiving member that reciprocates by wind force, and the other dust discharge valve is opened by movement in the other direction. If one is configured not to open at the same time as the other dust discharge valve,
Dust discharged by opening the upper dust discharge valve is received and temporarily held by the lower dust discharge valve, discharged by opening the lower dust discharge valve, and sequentially discharged from top to bottom. Is done. At this time, since at least one of the dust discharge valves does not open simultaneously with the other dust discharge valves, the dust once dropped is discharged without flowing back into the cyclone chamber.
In addition, since the dust can be discharged by receiving wind force on the wind receiving member, no power is used, no complicated work such as filter replacement is performed, and operation is performed without maintenance. be able to.

  Next, the best mode for carrying out the present invention will be described.

  FIG. 1 is a diagram showing an embodiment of a cyclone separator to which the present invention is applied.

  This cyclone separator is a horizontal axis type cyclone separator, in which the shaft 2 of the cyclone cylinder 1 is installed horizontally.

  The cyclone separation apparatus includes a substantially cylindrical cyclone cylinder 1 having a cyclone chamber 3 inside. The cyclone cylinder 1 is provided with an intake port 4 on a wall surface 1a at one end in the axial direction and an exhaust port 5 on a wall surface 1b at the other end.

  An intake air blocking region 10 that blocks intake air to the cyclone chamber 3 is provided in a predetermined region in the vicinity of the axial center of the wall surface 1 a on the intake port side of the cyclone cylinder 1. The intake air blocking region 10 is formed as a circular region centered on the axial center, and the intake port 4 is formed in a concentric circular shape around the axial center around the intake air blocking region 10 by the intake air blocking region 10. It is formed as a region. Short cylindrical intake ducts 7a and 7b are respectively arranged on the inner periphery and the outer periphery of the intake port 4 formed as the annular region. In addition, an annular wall surface 1 a exists around the outside of the intake port 4.

  On the other hand, the exhaust port 5 is formed as a region in the vicinity of the axial center facing the intake air blocking region 10, and the exhaust port 5 is formed as a circular region centered on the axial center, and has a cylindrical shape at the opening edge. A duct member 14 is attached. As described above, the exhaust port 5, the intake air blocking region 10, the intake port 4, and the cyclone cylinder 1 are all arranged and formed concentrically around the axis.

  In the intake port 4 formed as the annular region, inclined blade members 6 for allowing a vortex to flow into the cyclone chamber 3 are arranged in the circumferential direction.

  FIGS. 2A and 2B are views showing the blade member 6. The blade members 6 are arranged radially about the axis, and each blade member 6 has a predetermined angle (α in this example) with respect to a plane orthogonal to the axis 2 (ie, a plane parallel to the wall surface 1a). It is arranged to tilt only. In this example, each blade member 6 is formed in a substantially fan-shaped flat plate shape having a predetermined angle (θ in this example), and 12 blade members 6 are arranged at substantially equal intervals in the circumferential direction (therefore, In this example, θ is about 30 °).

  2 (c) and 2 (d) are modified examples of the blade member 6, FIG. 2 (c) is not flat but has a streamlined cross section, and FIG. 2 (d) is the upstream side of the slope. Is formed by bending the side portion of the upstream side toward the upstream side. The number, inclination angle, size, shape, and the like of the blade members 6 are not limited to the examples described above, and can be set as appropriate from the viewpoint of pressure loss, separation performance, and the like.

  In the cyclone separator, the intake air blocking region 10 is preferably 50% or more of the exhaust port 5, and more preferably 80% or more of the exhaust port 5. By doing so, it is possible to prevent the vortex from being sucked into a region close to the exhaust port 5 in the cyclone cylinder, and to prevent the intake air in a state where dust is not sufficiently removed by centrifugation from being discharged from the exhaust port 5. And sufficient separation efficiency can be secured.

More preferably, the intake air blocking region 10 is preferably formed to be the same as or wider than the exhaust port 5. That is, it is more preferable that the diameter of the intake air blocking region 10 is set to be equal to or larger than the diameter of the exhaust port 5. In this example, the illustrated code is set to have a relationship of d ₀ ≦ d ₂ . In this way, when the vortex flow in the cyclone chamber from which the dust is separated is discharged from the exhaust port smaller than the intake air blocking region of the intake port, the dust is made outside by the momentum of the exhaust discharged from the exhaust port. It is prevented from taking out, and the separation efficiency is increased.

  A dust storage chamber 8 for storing the dust separated in the cyclone chamber 3 is provided below the cyclone cylinder 1. On the wall surface of the cyclone cylinder 1 between the dust storage chamber 8 and the cyclone chamber 3, a dust drop opening 9 is opened. The dust drop port 9 is formed in a slit shape over the entire axial length of the cyclone cylinder 1. Further, the dust drop port 9 is provided at a position where the height is lowest when the cyclone separating device is used. As a result, the dust that has fallen and separated in the cyclone chamber 3 due to friction with the peripheral wall falls into the dust chamber 8 from the dust drop port 9 due to gravity.

  FIG. 3 shows a modified example. On the inner peripheral wall of the cyclone cylinder 1, a protrusion 18 extending over the entire length in the axial direction is formed at the edge of the dust drop port 9 on the downstream side in the rotational direction of the vortex. The protrusion 18 collides with dust traveling along the inner peripheral wall by the action of the vortex air flow, and efficiently drops the dust to the dust dropping port 9 to increase the separation efficiency.

  Similarly, microprojections are provided on the entire inner peripheral wall of the cyclone chamber 3 to collide with dust traveling along the inner peripheral wall due to the action of the vortex air flow and increase the dust separation efficiency, or the inner peripheral wall is roughened by blasting or the like. It is also possible to increase the separation efficiency by applying the finishing.

  With the above configuration, a strong swirling flow is generated when the blade member 6 flows in, and the dust is centrifuged immediately after flowing into the cyclone cylinder 1 and immediately falls into the dust storage chamber 8, so that the axial length of the cyclone cylinder 1 is increased. Even if the length is shortened, there is almost no decrease in separation performance, and miniaturization is possible while maintaining high separation performance. Further, since the area of the intake port 4 of the cyclone cylinder 1 can be increased, the pressure loss during the flow of outside air can be reduced, and the length of the cyclone cylinder 1 in the axial direction is short, so that a conventional cyclone separator is provided. Since the cyclone inner cylinder is not required, the friction loss generated in the cyclone cylinder is small, and the flow flowing from the intake port 4 of the cyclone cylinder 1 is reversed in the axial direction as in the conventional cyclone separator. Since it flows in one direction along the axis without being discharged from the cyclone cylinder 1, various flow losses can be reduced. For this reason, the overall pressure loss of this device can be significantly reduced compared to conventional cyclone separators.

  FIG. 4 shows an embodiment in which the cyclone separator is applied to a residential air supply hood.

  The housing ventilation air supply hood desirably has a small occupied area on the outer wall and a smaller thickness as viewed from the outer wall because of restrictions on the installation space such as eaves and window frames and problems on the housing outer wall landscape. Therefore, the horizontal axis type device capable of reducing the axial length L of the cyclone cylinder 1 to be thin is most suitable as an air supply hood for house ventilation.

  When this apparatus is incorporated in a housing ventilation air supply hood, it is desirable to cover the air inlet 4 with a rain / snow prevention cover 15 in order to prevent rain and snow from blowing. In addition, since the housing ventilation air supply hood is generally attached to a high place in many cases, it is difficult for the user to perform maintenance. Therefore, the apparatus is provided with a mechanism for automatically discharging dust.

  FIG. 5 shows a dust discharge device that automatically discharges dust stored in the dust storage chamber 8.

  The dust discharge device is provided with a plurality of dust discharge valves 11 and 12 arranged in the vertical direction, and at least one of the plurality of dust discharge valves 11 and 12 is configured not to open simultaneously with other dust discharge valves. Has been.

  More specifically, a dust drop chamber 19 is provided below the dust storage chamber 8. A first dust discharge port 13a is formed on the lower surface of the dust storage chamber 8, and a first dust discharge valve 11 for opening and closing the first dust discharge port 13a is provided. A first dust discharge port 13b is formed on the lower surface of the dust drop chamber 19, and a second dust discharge valve 12 for opening and closing the second dust discharge port 13b is provided.

  The first dust discharge valve 11 and the second dust discharge valve 12 are configured to open and close by rotating about the rotation shaft 20. The first dust discharge valve 11 and the second dust discharge valve 12 are normally configured to close the first dust discharge port 13a and the second dust discharge port 13b by a biasing means such as a torsion coil spring (not shown). The power is working.

  In the first dust discharge valve 11 and the second dust discharge valve 12, the first dust discharge valve 11 and the second dust discharge valve 12 are rotated around the rotation shaft 20 around the rotation shaft 20, respectively. A hook-shaped first lever member 21a and second lever member 21b are attached. When the first lever member 21a is pressed to the left side of the figure, the first dust discharge valve 11 is rotated and opened, and when the second lever member 21b is pressed to the right side of the figure, the second dust is discharged. The discharge valve 12 is configured to rotate and open.

  A rotating arm 17 to which a wind receiving plate 16 is attached is pivotally supported above the first dust discharge valve 11 in the dust chamber 8. The rotating arm 17 rotates like a pendulum to the left and right in the drawing with the rotating shaft 22 as an axis, and the wind receiving plate 16 attached to the lower end of the rotating arm 17 receives outdoor wind. It is designed to reciprocate left and right.

  Then, due to the movement in one direction (the left side in the figure) of the wind receiving plate 16 as a wind receiving member that reciprocates by the wind power, the rotating arm 17 pushes the first lever member 21a to the left side in the figure to The first dust discharge valve 11 is opened. By opening the first dust discharge valve 11, dust accumulated in the dust storage chamber 8 is discharged from the first dust discharge port 13 a and introduced into the dust drop chamber 19. Subsequently, the movement of the wind receiving plate 16 in the other direction causes the rotating arm 17 to press the second lever member 21b to the right side in the drawing to open the other second dust discharge valve 12. . By opening the second dust discharge valve 12, the dust accumulated in the dust drop chamber 19 is discharged to the outside from the second dust discharge port 13b.

  With such a configuration, the first dust discharge valve 11 and the second dust discharge valve 12 are configured not to open simultaneously. Thereby, the dust discharging apparatus is automatically operated by wind power. That is, the wind receiving plate 16 that receives the wind pressure is fixed to the end of the rotating arm 17 that rotates, and the wind receiving plate 16 is installed at the lower portion of the air supply hood. When a certain amount of strong wind hits the wind receiving plate 16, the wind receiving plate 16 is moved by the wind pressure, and the rotating arm 17 is rotated. This rotational movement is transmitted to the two dust discharge valves 11 and 12 by a link mechanism, and the valves are opened and closed. Since the magnitude of the wind receiving plate determines the strength of the wind at which the valve opens and closes, it is desirable to determine the size of the wind receiving plate 16 from the relationship between the predicted wind force and the required discharge frequency.

  FIG. 6 shows a modification of the dust discharge device.

  This dust discharge device does not mechanically open and close the first dust discharge valve 11 and the second dust discharge valve 12 by the wind receiving plate 16 and the rotating arm 17, but the first electromagnetic coil 23a and the second electromagnetic coil 23b. Thus, the first dust discharge valve 11 and the second dust discharge valve 12 are electrically opened and closed. Even in this case, the first dust discharge valve 11 and the second dust discharge valve 12 are controlled not to open simultaneously.

  As described above, according to the present embodiment, by providing the intake air blocking region 10 that blocks intake air to the cyclone chamber 3 in a predetermined region near the axial center of the intake port 4, the annular region around the intake air blocking region 10 is provided. In the intake port 4 formed as the annular region, inclined blade members 6 for allowing a vortex to flow into the cyclone chamber 3 are arranged so as to be arranged in the circumferential direction. However, the vortex can be effectively introduced into the cyclone chamber 3 from the annular intake port 4 by effectively generating the vortex by the extremely short structure. The exhaust port 5 is formed as a region in the vicinity of the axial center facing the intake air blocking region 10, and the intake air blocking region 10 is formed to be the same as or wider than the exhaust port 5, so that the annular intake port 4 is formed. By introducing the vortex from the cyclone chamber 3, the vortex can be introduced near the side wall for separating dust without introducing the vortex near the axial center of the cyclone chamber 3. Dust is effectively separated by effectively hitting the side wall of the battery. In addition, when the vortex flow in the cyclone chamber 3 from which the dust has been separated is discharged from the exhaust port 5 smaller than the intake air blocking region 10 of the intake port 4, It is prevented that it is put out. Moreover, since a conventional cyclone inner cylinder is not required, the friction loss generated in the cyclone cylinder 1 is small, and the flow flowing in from the intake port 4 flows in one direction along the axis without being reversed in the axial direction. In addition, since the axial length of the cyclone chamber 3 itself can be greatly reduced, the pressure loss is also greatly reduced. With this structure, the cyclone chamber 3 itself can be greatly reduced in size in the axial direction, and a cyclone separator having high dust separation efficiency and low pressure loss can be obtained.

  Further, since the cylindrical intake ducts 7a and 7b are arranged on the inner periphery and the outer periphery of the intake port 4 formed as the annular region, the air flow near the intake port 4 is sucked into the intake air due to the presence of the intake ducts 7a and 7b. Since it is guided into the intake port 4 without escaping to any part other than the port 4, a strong vortex can be introduced into the cyclone chamber 3, and the vortex is effectively hit against the side wall of the cyclone chamber 3 and dust is more effective. Separated.

  The cyclone chamber 3 includes a dust storage means for storing the dust separated in the cyclone chamber 3, and the dust storage means is provided with a plurality of dust discharge valves 11 and 12 arranged in the vertical direction. Since at least one of the plurality of dust discharge valves 11 and 12 is configured not to open at the same time as the other dust discharge valves, the dust discharged by opening the first dust discharge valve 11 is the second dust. Received by the discharge valve 12 and temporarily held, discharged by opening the second dust discharge valve 12, and sequentially discharged from top to bottom. At this time, since at least one of the dust discharge valves 11 and 12 does not open simultaneously with the other dust discharge valves, the dust once dropped is discharged without flowing back into the cyclone chamber 3. In this manner, maintenance-free operation can be performed without performing complicated operations such as filter replacement.

  In addition, since the first dust discharge valve 11 is opened by movement in one direction of the wind receiving plate 16 reciprocated by wind force, and the second dust discharge valve 12 is opened by movement in the other direction, the above Since dust can be discharged by receiving wind force on the wind receiving plate 16, it is possible to operate without maintenance without using any power or performing complicated work such as filter replacement. it can.

  Further, since the internal space of the cyclone cylinder 1 in which the annular intake port 4 and the exhaust port 5 are formed is hollow, there is no member that obstructs the flow of airflow inside the cyclone cylinder 1 and the pressure loss is minimized. Limited.

  FIG. 7 shows a cyclone separator according to the second embodiment of the present invention.

This cyclone separator is a vertical axis type cyclone separator. The basic composition is the same as that of the horizontal axis type shown in FIG. 1, but the wall 1 a of the cyclone cylinder 1 serving as the inlet 4 is made to be the cyclone cylinder 1 by installing the shaft 2 of the cyclone cylinder 1 vertically. Located on the underside. And the dust drop port 9 is provided in the outer peripheral part vicinity of the wall surface 1a of the cyclone cylinder 1, and the dust storage chamber 8 is installed in the lower part. Therefore, the maximum value of the diameter d ₁ of the intake port 4 is reduced by a size necessary for the dust storage chamber 8. In the figure, the dust drop opening 9 and the dust storage chamber 8 are provided only in a part of the vicinity of the outer peripheral portion of the wall surface 1 a of the cyclone cylinder 1. It can also be installed concentrically with the cyclone cylinder 1 over the entire circumference. The rest is the same as in the first embodiment, and the same reference numerals are given to the same parts. This embodiment also has the same operational effects as the first embodiment.

  FIG. 8 shows a cyclone separator according to a third embodiment of the present invention.

  This cyclone separator is configured such that the vicinity of the opening of the exhaust port 5 on the cyclone chamber 3 side protrudes toward the cyclone chamber 3 side.

FIG. 8A shows a projecting portion 24 a formed by projecting the root portion of the duct member 14 provided at the periphery of the exhaust port 5 toward the cyclone chamber 3.
FIG. 8B shows a case where a protruding portion 24 b is formed by forming a curved portion protruding toward the cyclone chamber 3 on a part of the peripheral wall surface 1 b of the exhaust port 5.
FIG. 8C shows a projecting portion 24 c formed by forming the peripheral wall surface 1 b of the exhaust port 5 on an inclined surface that gradually protrudes toward the cyclone chamber 3 as it approaches the exhaust port 5.

  Thus, since the vicinity of the opening of the exhaust port 5 on the cyclone chamber 3 side protrudes to the cyclone chamber 3 side, the exhaust gas protrudes when the vortex in the cyclone chamber 3 is discharged from the exhaust port 5. Therefore, it is possible to more reliably prevent dust from being discharged to the outside by the momentum of exhaust, and to improve the separation efficiency.

  FIG. 9 is a diagram showing the measurement results of the dust separation ability of the cyclone separation device of the present invention.

The dust separation ability was measured by a horizontal axis type cyclone separation apparatus shown in FIG. The test conditions at this time were as shown below.
〔Test conditions〕
Cyclone cylinder outer diameter D = 200mm
Number of blade members n = 18 Inlet outside diameter d ₁ = 180 mm
Air inlet diameter d ₂ = 100mm
Exhaust port diameter d ₀ = 100 mm
Flow rate Q = 100m ³ / h

  In FIG. 9, the axial length L of the cyclone cylinder 1 was changed under the above conditions, and the separation performance with respect to the axial length L was evaluated. As test dust, foamed polystyrene particles with a particle diameter of 2.5 mm were used assuming small insects, and JIS powder (15 types of JIS Z8901 test powder 1) was used assuming general outdoor dust. . The separation rate η was evaluated as a weight ratio of the separated and collected dust to the sucked dust.

  Regarding the expanded polystyrene particles, it can be seen that a separation rate of almost 100% is obtained at L ≧ 60 mm. It can also be seen that with regard to JIS powder, a separation rate of about 80% is obtained at L ≧ 100 mm. Therefore, in this case, there is no particular limitation, and the load on the filter provided in the air blower downstream from the separation device is reduced to about 1/5. On the other hand, the pressure loss coefficient in this case is about 2, which is about the same level as a commonly used residential ventilation air supply hood.

  As described above, according to the present invention, since the cyclone separator can be downsized while achieving both high separation performance and low pressure loss, the cyclone separator has not been used so far due to installation problems. The device can be used for various devices (for example, an air supply hood for house ventilation, an air cleaner for an engine, an air conditioner).

It is a figure which shows one Embodiment of the cyclone separator of this invention, (a) is a front view, (b) is AA sectional drawing, (c) is BB sectional drawing. It is a figure which shows a blade member, (a) is a perspective view, (b) is sectional drawing, (c) And (d) is sectional drawing of a modification. It is BB sectional drawing of a modification. It is a perspective view which shows one Embodiment of the supply hood for house ventilation of this invention. It is a figure explaining the structure of the discharge valve of the said supply hood for house ventilation, (a) is sectional drawing, (b) is a perspective view which shows one discharge valve. It is sectional drawing which shows the modification of a discharge valve. It is a figure which shows 2nd Embodiment of the cyclone separator of this invention, (a) is sectional drawing, (b) is a front view. It is a figure which shows 3rd Embodiment of the cyclone separator of this invention. It is a figure which shows the measurement result of the dust separation capability of the cyclone separation apparatus of this invention. It is a figure which shows the conventional cyclone separator.

Explanation of symbols

1: Cyclone cylinder 1a: Wall surface 1b: Wall surface 2: Shaft 3: Cyclone chamber 4: Intake port 5: Exhaust port 6: Blade member 7a: Intake duct 7b: Intake duct 8: Dust storage chamber 9: Dust drop port 10: Intake air blocking area 11: dust discharge valve 12: dust discharge valve 13a: first dust discharge port 13b: second dust discharge port 14: duct member 15: rain wind prevention cover 16: wind receiving plate 17: rotating arm 18: protruding shape 19: Dust drop chamber 20: Rotating shaft 21a: First lever member 21b: Second lever member 22: Rotating shaft 23a: First electromagnetic coil 23b: Second electromagnetic coil 24a: Projection 24b: Projection 24c: Projection Part

Claims (6)

A cyclone separator having a cyclone chamber having an intake port at one end in the axial direction and an exhaust port at the other end,
The intake port is formed as an annular region around the intake air blocking region by providing an intake air blocking region that blocks intake air to the cyclone chamber in a predetermined region near the shaft center, while the exhaust port is formed as the intake air blocking region Formed as a region near the axial center facing
In the intake port formed as the annular region, inclined blade members for allowing a vortex to flow into the cyclone chamber are arranged in the circumferential direction, and the intake blocking region is 50% or more in size of the exhaust port. is set to,
The axis of the cyclone chamber is horizontal,
In the lower part of the cyclone chamber, a dust storage chamber for storing the dust separated in the cyclone chamber is provided over the entire axial length of the cyclone chamber,
A cyclone separation device characterized in that a slit-like dust drop opening is formed at the lowest part of the wall surface of the cyclone chamber and extends over the entire length of the cyclone chamber in the axial direction .   The cyclone separator according to claim 1, wherein a cylindrical intake duct is arranged on each of an inner periphery and an outer periphery of an intake port formed as the annular region.   The cyclone separator according to claim 1 or 2, wherein the vicinity of the opening on the cyclone chamber side of the exhaust port protrudes toward the cyclone chamber side. Upper Symbol dust accommodating chamber is provided with a plurality of dust discharge valve arranged in the vertical direction, according to claim at least one is configured not to open at the same time as the other dust discharge valve of the plurality of dust discharge valve 1 The cyclone separator as described in any one of -3. An air supply hood for housing ventilation for taking in outside air for supplying air for internal ventilation of the house,
A cyclone chamber having an intake port at one end in the axial direction and an exhaust port at the other end is provided. The intake port is provided with an intake air blocking region that blocks intake air to the cyclone chamber in a predetermined region near the axial center. The exhaust port is formed as a region in the vicinity of the axial center facing the intake blocking region, and the intake port formed as the annular region is vortexed into the cyclone chamber. Inclined blade members for inflowing are arranged so as to be arranged in the circumferential direction, and the intake air blocking region includes a cyclone separating device set to a size of 50% or more of the exhaust port ,
The axis of the cyclone chamber is horizontal,
In the lower part of the cyclone chamber, a dust storage chamber for storing the dust separated in the cyclone chamber is provided over the entire axial length of the cyclone chamber,
An air supply hood for residential ventilation, characterized in that a slit-like dust outlet is formed at the lowermost part of the wall of the cyclone chamber and extends in the axial direction of the cyclone chamber . Upper Symbol dust accommodating chamber, dust discharge valve is provided arranged in the vertical direction,
One dust discharge valve is opened by movement in one direction of the wind receiving member that reciprocates by wind force, and the other dust discharge valve is opened by movement in the other direction. 6. An air supply hood for residential ventilation according to claim 5, wherein one of them is configured not to open simultaneously with another dust discharge valve.

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