Exhaust purifier and exhaust purifier system

Abstract

It collects oil and other substances that have entered the exhaust duct. [Solution] The system comprises a filter 10 that is forcibly rotated, a housing 20 that rotatably houses the filter 10, and a support member 40 that rotatably supports the filter 10 from the downstream side. The filter 10 has a number of holes 11 from the periphery to the center, the housing 20 is substantially cylindrical and covers the periphery of the filter 10 and is configured to be installed in the ventilation path of the exhaust duct 1, and the support member 40 is supported by the housing 20 intersecting the central axis of the filter 10.

Description

Technical Field

[0001] The present invention relates to an exhaust gas cleaning device and an exhaust gas cleaning system provided in a ventilation duct of a building where oil fumes are generated indoors, such as a kitchen, a food factory, or a machining factory.

Background Art

[0002] The oil fumes generated in a kitchen, a food factory, a machining factory, etc. are sucked into an exhaust duct by a ventilation fan or a range hood and discharged to the outside from the exhaust duct. Therefore, oil, moisture, dust, dirt, etc. adhere to the inside of the exhaust duct, its entrances and exits, the blower, etc., requiring a great deal of labor and cost for maintenance such as cleaning, and there is also a risk of accelerating the deterioration of the equipment. Furthermore, the oil accumulated in the exhaust duct may contribute to duct fires in some cases. Therefore, an invention is known in which a cooking exhaust discharge device is attached to the entrance of an exhaust duct, and an oil component or the like is captured by a grease filter fixed inside the cooking exhaust discharge device (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, according to the above prior art, oil, moisture, dust, dirt, etc. that cannot be completely removed by the grease filter may enter the exhaust duct and may stain the inside of the duct, the duct outlet, the blower, etc.

Means for Solving the Problems

[0005] In view of such problems, one aspect of the present invention has the following configuration. An exhaust gas purification device comprising a filter that is forcibly rotated, a housing that rotatably encloses the filter, and a support member that rotatably supports the filter from the downstream side, wherein the filter has a number of holes from the peripheral side to the center, the housing is substantially cylindrical in shape that covers the periphery of the filter and is configured to be installed in the ventilation path of an exhaust duct, and the support member is supported by the housing intersecting the central axis of the filter. [Effects of the Invention]

[0006] As described above, the present invention is configured to capture oil and other substances that have entered the exhaust duct. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram of an exhaust gas purification system equipped with an example of the exhaust gas purification device according to the present invention. [Figure 2] This is a perspective view of the exhaust gas purification device from the upstream, oblique side. [Figure 3] This is a perspective view of the exhaust gas purification device from the downstream, oblique side. [Figure 4] This is a six-view drawing of the exhaust purifying device. [Figure 5] This is a perspective view of the exhaust purifier with the front panel and filter removed. [Figure 6] A perspective view showing the state after removing the connecting parts and rear panel from the state shown in Figure 5. [Figure 7] This diagram shows the filter viewed from the upstream side, with the key parts enlarged. [Figure 8] This is an exploded perspective view showing the support members, cover members, side plates, vibration damping members, etc. [Figure 9] This is a perspective view of the exhaust purifier, with the upper half of the housing and support members cut out to reveal the internal structure. [Figure 10] This is a cross-sectional view of the exhaust gas purification device, with the drive mechanism and gas flow indicated by dashed lines. [Figure 11]This is a cross-sectional view showing an enlarged view of the main part of Figure 10, with the drive mechanism and gas flow indicated by dashed lines. [Modes for carrying out the invention]

[0008] Next, embodiments of the present invention will be described in detail with reference to the drawings. Exhaust purifying system A is installed in buildings where oil fumes are generated indoors, such as kitchens, food processing plants, and machine shops. This exhaust gas purification system A comprises an exhaust duct 1, a hood 2 connected to the intake port 1a of the exhaust duct 1, an exhaust gas purification device 3 located downstream of the intake port 1a in the exhaust duct 1, and a blower 4 that discharges gas downstream of the exhaust gas purification device 3 in the exhaust duct 1 (see Figure 1).

[0009] In the illustrated example, the exhaust duct 1 forms an exhaust path with an intake port 1a on the indoor side of the building and an exhaust port 1b on the outdoor side of the building, using cylindrical members such as tubes or cylindrical shapes.

[0010] In the illustrated example, the exhaust duct 1 extends upward from a downward-facing intake port 1a, penetrates the ceiling, passes through a curved section 1c, is guided in a substantially horizontal direction, and proceeds to the exhaust port 1b via an exhaust purification device 3, a blower 4, etc. The curved section 1c of the exhaust duct 1 causes inertial collisions with oil particles in the air passing through the exhaust duct 1. Due to these inertial collisions, the oil particles become larger in size and are more easily collected by the downstream exhaust purifier 3.

[0011] Hood 2 is designed to ensure that air is efficiently drawn into the intake port 1a of the exhaust duct 1. The hood 2 in the illustrated example is formed in a roughly trumpet shape with an opening at the bottom, and its upper end opening is connected to the intake port 1a of the exhaust duct 1. Furthermore, hood 2 can be of a shape other than the example shown, or it can be a range hood equipped with a blower, etc.

[0012] The exhaust gas purification device 3 includes a filter 10 that is forcibly rotated, a housing 20 that internally houses the filter 10 rotatably, a resistance plate 30 provided adjacent to the filter 10 on the downstream side of the filter 10, a support member 40 that supports the filter 10 and the resistance plate 30 from the downstream side, and a drive device 50 that rotates the filter 10 (see FIGS. 2, 3, 9, etc.).

[0013] The filter 10 is configured in a thin disk shape, has a number of holes 11 from its peripheral side to the center, and has a shaft hole 12 at its center portion (see FIG. 7).

[0014] Each hole 11 is an elongated hole that inclines in the rotational direction (clockwise according to FIG. 7) while heading toward the center portion of the filter 10. A plurality of these holes 11 are provided at predetermined intervals in the circumferential direction of the filter 10, and further, a plurality of layers are provided at predetermined intervals in the radial direction of the filter 10. As the filter 10 rotates and each hole 11 moves rapidly in the circumferential direction of the filter 10, oil, moisture, dust, dirt, etc. contained in the gas attempting to pass through each hole 11 contact the inner edge of the hole 11 and are flung in the centrifugal direction.

[0015] The shaft hole 12 is connected to the drive rotating shaft 52c of the drive device 50 (see FIG. 10) so as to be integrally rotatable.

[0016] The housing 20 is configured in a rectangular tube shape that covers the periphery of the filter 10 and is mounted in the middle of the ventilation path of the exhaust duct 1. Specifically, as illustrated in FIG. 1, the substantially horizontal middle portion of the exhaust duct !is divided at two locations. And at these two divided portions, an exhaust gas purification device 3 and a blower 4 are respectively mounted. As another example, it is also possible to divide the substantially horizontal middle portion of the exhaust duct 1 at one location and provide an exhaust gas purification device 3 and a blower 4 connected in series at this divided portion. Furthermore, as another example, it is also possible to adopt a mode in which an exhaust gas purification device 3 or a blower 4 is installed in the internal space of the non-divided exhaust duct 1.

[0017] The housing 20 comprises a front plate portion 21 that covers the area around the numerous holes 11 in the filter 10 from the upstream side, a rear plate portion 22 that covers the area around the numerous holes 11 in the filter 10 from the downstream side, a first connecting portion 23 and a second connecting portion 24 that connect and reinforce the front plate portion 21 and the rear plate portion 22 (see Figures 5 and 6), and a peripheral wall 25 that surrounds the filter 10, the front plate portion 21, the rear plate portion 22 and the first connecting portion 23, etc., in a substantially cylindrical shape.

[0018] The front plate portion 21 is located upstream of the filter 10 and has a substantially circular front plate opening 21a on its central side. This front plate portion 21 is formed in a roughly rectangular shape that includes the filter 10, and its peripheral edge is bent toward the rear plate portion 22 (see Figure 5).

[0019] The front plate opening 21a is located inside the outer edge of the filter 10 when viewed from the direction of the rotation axis of the filter 10. The inner diameter of the front plate opening 21a is set to be smaller than the outer diameter of the filter 10, and to be large enough to include almost all of the numerous holes 11 of the filter 10. This size relationship prevents the filter 10 from flying out upstream of the front plate portion 21 even if it were to fall off the drive rotating shaft 52c.

[0020] The rear plate portion 22 is located downstream of the filter 10 and has a rear plate opening 22a on its central side. This rear plate portion 22 is formed in a roughly rectangular shape with approximately the same size as the front plate portion 21, and its peripheral edge is bent toward the front plate portion 21 (see Figure 6).

[0021] The rear plate opening 22a is located inward from the outer edge of the filter 10 when viewed from the direction of the rotation axis of the filter 10. The inner diameter of the rear plate opening 22a is set to be smaller than the outer diameter of the filter 10, and to be large enough to include almost all of the numerous holes 11 of the filter 10. This size relationship prevents the filter 10 from flying out downstream of the rear plate portion 22 even if it were to fall off the drive rotating shaft 52c. Furthermore, the inner diameter of the rear plate opening 22a is approximately the same as the inner diameter of the front plate opening 21a. Therefore, oil fumes and the like can smoothly pass through the numerous holes 11 of the filter 10 between the front plate opening 21a and the rear plate opening 22a, and consequently, oil, moisture, dust, and other particles contained in the oil fumes can be efficiently captured.

[0022] Furthermore, the inner edge of the front plate opening 21a and / or the inner edge of the rear plate opening 22a may slightly overlap the holes 11 of the filter 10, within a range that does not cause any bearing issues due to manufacturing tolerances, etc.

[0023] The space between the front plate portion 21 and the rear plate portion 22 is closed off at its peripheral end by the peripheral wall 25. The peripheral end portions of the front plate portion 21 and the rear plate portion 22 are closed off by the peripheral wall 25, resulting in a cross-sectional shape that is roughly like a bag. This roughly bag-shaped section in cross-section is continuous in an annular shape, and the portion near its lower end functions as a collection section 28 that collects substances (such as oil, water, dust, and dirt) captured by the filter 10.

[0024] In other words, the material captured by the rotating filter 10 is collected in the surrounding bag-shaped section by centrifugal force, moves downward due to its own weight, and accumulates in the collection section 28. Furthermore, vapor contained in the gas passing through the filter 10 condenses upon contact with the resistance plate 30 and the support member 40. This condensed substance (for example, water) accumulates on the lower side of the resistance plate 30 and the support member 40 within the housing 20. The captured materials and condensed substances accumulated as described above should be discharged to the outside of the exhaust purifier 3 and exhaust duct 1 by an appropriate discharge means (for example, a drain pipe not shown).

[0025] Multiple first connection sections 23 are arranged in a roughly ring-shaped configuration surrounding the filter 10, sandwiched between the front plate section 21 and the rear plate section 22 (see Figures 5 and 6). In a preferred example of this embodiment, these first connection points 23 are provided at four locations corresponding to the squares of the housing 20. These multiple first connection points 23 are arranged point-symmetrically with respect to the rotation center of the filter 10. Each first connection portion 23 is provided on a line connecting the corner of the housing 20 and the rotation center of the filter 10, so as to be substantially parallel to the tangent to the outer circumference of the filter 10. Each first connecting portion 23 is then fastened to both the front plate portion 21 and the rear plate portion 22 by appropriate fastening means (for example, screws or rivets).

[0026] Multiple second connecting portions 24 are provided between the front plate portion 21 and the rear plate portion 22, close to one end and the other end of each first connecting portion 23 (see Figures 5 and 6). Each second connecting portion 24 is a stepped shaft-shaped member with a reduced diameter at one end. One end is fitted into a fitting hole (not shown) in the rear plate portion 22, while the other end is fastened to the front plate portion 21 with screws, rivets, or the like. This second connecting portion 24 maintains the positional relationship between the front plate portion 21 and the rear plate portion 22 with high precision.

[0027] The first connection part 23 and the second connection part 24 of the above configuration appropriately maintain the distance between the front plate part 21 and the rear plate part 22, and by increasing the overall rigidity of the front plate part 21 and the rear plate part 22, vibration and noise of the front plate part 21 and the rear plate part 22 are reduced. In particular, the first connection portion 23 is provided in an elongated shape that is substantially parallel to the outer tangent of the filter 10, thereby effectively suppressing vibrations and vibration noises associated with the rotation of the filter 10. Furthermore, the first connection part 23 and the second connection part 24 of the above configuration prevent the front plate part 21 and the rear plate part 22 from deforming due to wind pressure and coming into contact with the filter 10.

[0028] In the above embodiment, multiple first connecting portions 23 are provided at intervals in the circumferential direction. However, other examples of the first connecting portion 23 include those formed in an endless ring shape (including circular rings, polygonal rings, etc.). For example, if the first connecting portion 23 is formed in the shape of a polygonal ring, oil tends to accumulate in the corners, so an oil recovery portion can be provided in the corners to facilitate oil recovery. Furthermore, if the first connection portion 23 is formed in an annular shape, the captured oil will circulate. By providing an oil recovery section tangentially to this annular first connection portion 23, the circulating oil can be efficiently recovered.

[0029] The peripheral wall 25 is constructed in a rectangular tubular shape by four side plates 25a, 25b, 25c, and 25d (see Figure 4) on the top, bottom, left, and right sides. Vibration damping members 26a, 26b, 26c, and 26d are provided on each of the four side plates 25a, 25b, 25c, and 25d. Furthermore, rectangular frame members 29 are fixed to the rear ends of the four side plates 25a, 25b, 25c, and 25d (see Figure 3).

[0030] The upper side plate 25a is a rectangular plate-shaped member in plan view. The edges on each side of this side plate 25a are bent upward for reinforcement or other purposes.

[0031] The vibration damping member 26a is located near the center in the front-to-back direction of the peripheral wall 25 (side plate 25a) and extends in an elongated shape along the longitudinal direction (circumferential direction) of the peripheral wall 25 (side plate 25a). This vibration damping member 26a has a roughly hat-shaped cross-section with an opening at the bottom, which is continuous in the left-right width direction.

[0032] The lower side plate 25b and vibration damping member 26b are configured to be vertically symmetrical with respect to the upper side plate 25a and vibration damping member 26b.

[0033] The side plate 25c, located on the opposite side from the side plate 25d which houses the motor, is constructed in a roughly rectangular shape with its edges on all four sides bent, similar to the side plate 25a. The side plate 25c is provided with a ventilation hole 25c1 that communicates with one of the open ends of the support member 40, which will be described later. This ventilation hole 25c1 allows for ventilation between the internal space of the support member 40 and the external space of the peripheral wall 25.

[0034] The vibration damping member 26c that reinforces the side plate 25c is formed in the same manner as the vibration damping member 26a, with a long, continuous hat-shaped cross-section.

[0035] The side plate 25d located on the side equipped with the motor is constructed in the same way as the side plate 25a, with its edges on all four sides bent to form a roughly rectangular plate shape. The side plate 25d is provided with a circular through-hole 25d1 for the motor section 51 of the drive unit 50, and ventilation holes 25d2 and 25d3 that communicate with the other open end of the support member 40, which will be described later (see Figure 8).

[0036] The motor section 51 of the drive unit 50 is fitted into the motor support hole 25d1 of the side plate 25d by fasteners 51a (see Figure 10), such as bolts or screws, and secured to the side plate 25d by fasteners 51a.

[0037] As described above, the motor unit 51 is exposed to the outside of the peripheral wall 25, making maintenance of the motor unit 51 easy. Furthermore, it prevents heat inside the exhaust duct 1 from heating the motor unit 51, thereby preventing the spread of fire and electrical leakage in the event of a duct fire. Furthermore, since it becomes unnecessary to use a motor that can handle high humidity, the exhaust purification device 3 can be made into a relatively inexpensive configuration.

[0038] The fastener 51a is inserted from the outside into the flange portion 51b (see Figure 9) on the front end side of the motor portion 51, and its male threaded portion at the tip penetrates the side plate 25d. A washer and a nut are screwed onto the male threaded portion of the fastener 51a that penetrates the side plate 25d and tightened.

[0039] A cover member 27d is provided on the inner surface of the side plate 25d so as to cover the male threaded portion at the tip of the fastener 51a and the nut or the like that is screwed onto this male threaded portion. The cover member 27d is formed in a horizontally oriented, roughly concave box shape that covers the ends of the multiple fasteners 51a, and is fixed to the inner surface of the side plate 25d. This cover member 27d prevents interference between the connection portion (fastener 51a) of the motor unit 51 to the side plate 25d and the connection portion of the support member 40 to the same side plate 25d.

[0040] Furthermore, by interposing this cover member 27d between the side plate 25d and the support member 40, the support member 40 is made smaller (thinner). In other words, if the cover member 27d is absent, the entire support member 40 needs to be enlarged in the radially outward direction of the power transmission shaft 52a in order to avoid interference between the support member 40 and the fastener 51a. However, according to this embodiment, the cover member 27d avoids interference with the fastener 51a, making the support member 40 smaller (thinner), which reduces the resistance that the support member 40 would create to the gas flowing inside the housing 20.

[0041] Furthermore, the cover member 27d is provided with a shaft through-hole 27d1 through which the output shaft of the motor unit 51 is rotatably inserted, and a ventilation hole 27d2 that communicates with the internal space of the support member 40 (see Figure 8).

[0042] The vibration damping member 26d has a ventilated hollow cross-section that extends in a long, continuous manner along the longitudinal direction (circumferential direction) of the peripheral wall 25 (side plate 25d) near the motor section 51. Both ends of the vibration damping member 26d in the longitudinal direction are open, and these end openings 26d3 communicate with the external space of the housing 20. The vibration damping member 26d is provided with a motor through-hole 26d1 through which the motor unit 51 is inserted, and a plurality of ventilation holes 26d2 (see Figure 8).

[0043] The internal space of the vibration damping member 26d is in communication with the external space of the housing 20 through the end opening 26d3 and the ventilation holes 26d2, etc. Furthermore, the internal space of the vibration damping member 26d is connected to the internal space of the support member 40 via the ventilation holes 25d3 in the side plate 25d, the ventilation holes 27d2 in the cover member 27d, etc. (see Figures 10 and 11). With these configurations, the internal space of the vibration damping member 26d functions as a passage for the flow of gas (refrigerant) from outside the housing 20, and the flow of gas within the vibration damping member 26d can suppress the heat generation of the motor unit 51.

[0044] Furthermore, the ventilation holes 26d2 of the vibration damping member 26d, as described above, not only serve to allow gas to pass inside and outside the vibration damping member 26d, but also function as holes for fastening fasteners 27d3 (screws, bolts, etc.) that secure the cover member 27d to the side plate 25d. In other words, a tool such as a screwdriver (not shown) is inserted into the ventilation hole 26d2, and the fastener 27d3 is tightened with this tool (see Figure 11).

[0045] Similarly, the ventilation holes 25d3 in the side plate 25d not only serve to allow gas to pass inside and outside the cover member 27d, but also function as holes for fastening fasteners 41 (screws, bolts, etc.) that secure the support member 40 to the side plate 25d (see Figure 11).

[0046] The frame member 29 is formed in a single rectangular frame shape and is fastened to the rear ends of the four side plates 25a, 25b, 25c, and 25d.

[0047] The vibration damping members 26a, 26b, 26c, 26d and the frame member 29 in the above configuration increase the overall rigidity of the peripheral wall 25, thereby reducing vibration and noise associated with the rotation of the filter 10. Furthermore, the vibration damping members 26a, 26b, 26c, and 26d reduce the transfer of heat from the peripheral wall 25 to the surrounding area when the peripheral wall 25 becomes hot. That is, for example, if the exhaust purification system A is used for waste heat from cooking equipment, the peripheral wall 25 may reach temperatures of 80°C or higher. In such cases, workers may get burned if they directly touch the peripheral wall 25 for maintenance or other purposes. However, by instructing workers to touch the vibration damping members 26a, 26b, 26c, and 26d instead of the peripheral wall 25, the risk of such burns can be reduced.

[0048] The resistance plate 30 is formed in a circular, flat shape and is supported by the support member 40, positioned downstream from the holes 11 located closer to the center of the filter 10 among the numerous holes 11 of the filter 10. This resistance plate 30 acts as resistance to the gas passing through the aforementioned holes 11 closer to the center. In other words, the gas flowing through the exhaust duct 1 has a higher flow velocity near the center. Therefore, if there is no resistance plate 30, a large amount of oil mist and other particles will flow relatively quickly near the center of the filter 10, but the peripheral velocity near the center of the filter 10 is slower, resulting in a decrease in collection efficiency. However, with the exhaust gas purification device 3 of this embodiment, the flat resistance plate 30 acts as resistance to the oil fumes and other particles flowing near the center of the filter 10, so the flow rate of the oil fumes and other particles flowing near the outer diameter of the filter 10 increases relatively. Therefore, the outer diameter portion of the filter 10, which has a higher peripheral speed, can efficiently capture oil, water, dust, and other particles contained in the oil fumes and other particles.

[0049] The resistance plate 30, configured as described above, is firmly fixed to the support member 40 so as not to be affected even when subjected to a large volume of airflow. In the illustrated example, this fixing method is done by screw fastening, but it is also possible to use rivets, welding, fitting, etc.

[0050] Regarding the relationship between the outer diameters of the filter 10 and the resistance plate 30, for example, in the case of a high-airflow type, the outer diameter of the filter 10 is 500 mm and the outer diameter of the resistance plate 30 is 300 mm. As an example of a type with a smaller airflow, the outer diameter of the filter 10 is 300 mm and the outer diameter of the resistance plate 30 is 160 mm. Furthermore, the optimal distance between the filter 10 and the resistor plate 30 is within the range of 10 to 60 mm, and more preferably within the range of 20 to 45 mm.

[0051] The support member 40 is a hollow, elongated member that rotatably supports the filter 10 and non-rotatably supports the resistance plate 30, and is located in the space inside the housing 20. To explain the illustrated example in detail, one end of the support member 40 is supported on the inner wall surface of the peripheral wall 25 (side plate 25c), and the other end of the support member 40 is supported on the inner central side of the cover member 27d of the housing 20. Other examples include a configuration in which the other end of the support member 40 is directly supported on the inner wall surface of the peripheral wall 25, or a configuration in which the integral side and / or the other end of the support member 40 are supported on the inner wall surface of the peripheral wall 25 via an intermediate member other than those shown.

[0052] This support member 40 is located downstream of the filter 10 and is approximately perpendicular to the central axis of the filter 10. The internal space of this support member 40 is in communication with the space outside the housing 20.

[0053] To explain in detail, the support member 40 is formed by bending one or more sheet metal materials to create a roughly rectangular tubular shape with open ends on one and the other longitudinal sides.

[0054] One open end of the support member 40 is connected to the inner surface of the side plate 25c, including the ventilation hole 25c1 of the side plate 25c on the side opposite to the side plate equipped with the motor (see Figures 9 and 10). The other open end of the support member 40 is connected to the cover member 27d, including the ventilation hole 27d2 of the cover member 27d which is fixed to the inner surface of the side plate 25d.

[0055] With these configurations, as shown in Figures 9 and 10, outside air on the side opposite the motor in the exhaust purifier 3 enters the space within the support member 40 through the ventilation hole 25c1 and exits to the outside of the exhaust purifier 3 through the ventilation holes 27d2, 25d2, 25d3, and 26d2 near the motor section 51.

[0056] In other words, the internal space of the support member 40 functions as a passage through which air, acting as a coolant, flows in order to cool the support member 40, the resistance plate 30, the drive unit 50, etc. Furthermore, the internal space of the support member 40 houses the power transmission mechanism 52 of the drive unit 50 and also functions as a power transmission path.

[0057] The support member 40 in the above configuration has the central portion of the resistance plate 30 fixed immovably to its upstream side. Furthermore, the support member 40 rotatably supports the filter 10 upstream of the resistance plate 30 via an internal drive device 50. This support member 40 firmly fixes the resistance plate 30 and effectively reduces shaking and vibration of the resistance plate 30.

[0058] The drive unit 50 comprises a motor unit 51 and a power transmission mechanism 52 that transmits the rotational force of the motor unit 51 to the filter 10.

[0059] The motor unit 51 is an electric motor. The motor unit 51 has an output shaft that passes through the vibration damping member 26d, the side plate 25d, and the cover member 27d, and is fixed to the outer surface of the side plate 25d by a fastener 51a (see Figure 10).

[0060] The rotational speed of the motor unit 51 is appropriately controlled by a control circuit (not shown). More specifically, the rotational speed of the motor unit 51 is controlled by the control circuit, etc., such that the peripheral speed of one hole 11 moving along the circumference as the filter 10 rotates is greater than the flow velocity of the gas passing through the hole 11. This configuration allows for the effective capture of oil, moisture, dust, and other particles contained in the gas passing through the filter 10. In other words, if the peripheral speed of one hole 11 moving along the circumference as the filter 10 rotates is slower than the flow velocity of the gas passing through the hole 11, then oil, moisture, dust, and other particles contained in the gas may pass through each hole 11 without coming into contact with the inner edge of each hole 11. However, with the above configuration, the possibility of oil, moisture, dust, and other particles contained in the gas coming into contact with the inner edge of each hole 11 can be increased.

[0061] The power transmission mechanism 52 is configured to transmit the rotational force of the motor unit 51 into the housing 20, and to use this rotational force to drive the filter 10 to rotation. More specifically, the power transmission mechanism 52 comprises a power transmission shaft 52a that transmits the rotational force of the motor unit 51 to the center of the housing 20, a rotational axis direction conversion device 52b that converts the rotational force of the power transmission shaft 52a into a rotational force concentric with the filter 10, and a drive rotation shaft 52c that drives the filter 10 to rotate using the rotational force that has been converted in direction and transmitted by the rotational axis direction conversion device 52b (see Figures 9 and 10).

[0062] The power transmission shaft 52a is provided within the support member 40 so as to be approximately perpendicular to the central axis of the filter 10. One end of the power transmission shaft 52a is concentrically connected to the output shaft of the motor unit 51, and the other end extends toward the center of the housing 20.

[0063] The rotation axis direction conversion device 52b is a device that converts the direction of the rotation axis to approximately a right angle, and is composed of, for example, a gear mechanism in which two bevel gears mesh together. This rotational axis direction conversion device 52b is connected to the output side of the power transmission shaft 52a within the support member 40.

[0064] The drive rotating shaft 52c is an axial member provided substantially concentrically with the central axis of the filter 10. This drive rotating shaft 52c penetrates the peripheral wall of the support member 40, with one end connected to the output shaft of the rotation axis direction conversion device 52b within the support member 40, and the other end loosely inserted into the peripheral wall of the support member 40 and the resistance plate 30, and connected to the center of the filter 10.

[0065] Furthermore, the blower 4 is a device that generates an airflow within the exhaust duct 1 from the intake port 1a to the exhaust port 1b, and is configured to include, for example, a propeller fan or a sirocco fan. According to this blower 4, the gas drawn into the intake port 1a is forcibly transported downstream through the exhaust purification device 3 and discharged from the exhaust port 1b.

[0066] <Effects and Effects> According to the exhaust purifying device 3 and exhaust purifying device system A configured as described above, when the blower 4 is driven and a flow of oil mist is formed in the exhaust duct 1 from the intake port 1a to the exhaust port 1b, the exhaust purifying device 3 is driven and the filter 10 is rotated, causing oil, moisture, dust, and other particles contained in the gas attempting to pass through the filter 10 to be blown radially outward and collected in the collection unit 28. Thus, according to this embodiment, oil and other substances that have entered the exhaust duct 1 can be efficiently collected. Consequently, it becomes unnecessary to replace existing cooking exhaust discharge equipment.

[0067] Furthermore, in addition to passing the gas through the filter 10 in the axial direction as described above, the exhaust purifying device 3 also passes the gas from the sides through the support member 40. In other words, on the side opposite the side plate equipped with the motor, the gas outside the housing 20 enters the support member 40 through the ventilation holes 25c1 by natural convection, as shown in Figures 10 and 11, flows through the support member 40 toward the motor side, and flows out to the outside on the motor side through the ventilation holes 27d2 of the cover member 27d, the ventilation holes 25d2 and 25d3 of the side plate 25d, the ventilation holes 26d2 and end openings 26d3 of the vibration damping member 26d, etc. Note that the direction of this gas flow may be reversed depending on the installation environment of the exhaust gas purification device 3. Furthermore, the gas flow within the support member 40, as described above, cools the support member 40, the resistance plate 30, the drive unit 50, and the like.

[0068] Therefore, the gas that has passed through the filter 10 is brought into contact with the cooled resistance plate 30 and support member 40, condensing the vapor contained in the gas and capturing the condensed substance.

[0069] Therefore, the exhaust purifying device 3 and the exhaust purifying device system A can effectively capture oil, moisture, dust, and other particles contained in the gas that enters the exhaust duct 1, thereby reducing contamination of the inside of the exhaust duct 1 and the outlet of the exhaust duct 1 by oil, moisture, dust, and other particles.

[0070] Furthermore, since the motor unit 51 is located on the outside of the peripheral wall 25 of the housing 20, and the power transmission path of the power transmission mechanism 52 is housed within the support member 40, the motor unit 51 and the power transmission mechanism 52 are prevented from being contaminated by oil, moisture, dust, and other contaminants flowing through the exhaust duct 1, thereby ensuring that the durability of the drive unit 50 is maintained well over a long period of time. Furthermore, the support member 40 can prevent heat from the exhaust duct 1 from being transferred to the power transmission mechanism 52, and then from being transferred to the motor unit 51.

[0071] In the above embodiment, it is preferable to install the exhaust purifier 3 in the exhaust duct 1 such that the rotation center of the filter 10 and the center of the exhaust duct 1 substantially coincide. By doing so, oil fumes and the like passing through the exhaust duct 1 can be directed straight into the filter 10, further increasing the collection efficiency of the filter 10.

[0072] <Variation> According to the above embodiment, the housing 20 is formed in a substantially rectangular cylindrical shape, but other examples of the housing 20 include cylindrical shapes, polygonal cylindrical shapes other than rectangular, and other cylindrical shapes not shown in the illustration.

[0073] In the above embodiment, a first connecting portion 23 and a second connecting portion 24 are provided between the front plate portion 21 and the rear plate portion 22 as a particularly preferred example of low vibration. However, in other examples, it is possible to omit either one or both of these first connecting portion 23 and second connecting portion 24.

[0074] According to the above embodiment, gas flows in and out of the support member 40 by natural convection, etc. However, as an example other than the illustrated example, a blower can be installed inside or outside the support member 40, and this blower can be used to forcibly flow air from outside the housing 20 into the internal space of the support member 40. In this case, it is preferable to install the blower near the ventilation hole 25c1 (see Figure 9) on the side opposite to the side equipped with the motor. That is, since there are fewer space constraints both inside and outside the support member 40 near the ventilation hole 25c1, a relatively large blower can be installed to further cool the inside of the support member 40.

[0075] In the above embodiment, the fluid flowing inside the support member 40 is air, but this fluid can be any fluid other than air, as long as it functions as a coolant to cool the support member 40 and the like.

[0076] Another example of a means for cooling the support member 40 is to insert a refrigerant pipe (not shown) into the support member 40.

[0077] Furthermore, as an additional configuration to the above embodiment, the exhaust duct 1 and exhaust purifier 3 may be cooled by the cool air from an air conditioner that heats or cools the indoor air.

[0078] Another means of cooling the exhaust duct 1 is to allow at least a portion of the exhaust duct 1 to pass outdoors so that the exhaust duct 1 is cooled by the outdoor air.

[0079] Furthermore, as another means of cooling the exhaust duct 1, a fan may be installed near the exhaust duct 1 to blow cool air, such as outside air, and the exhaust duct 1 may be exposed to the airflow from this fan.

[0080] As described above, the exhaust purifying device system A in the above embodiment is a system installed in a building where oil fumes are generated. However, as another example, this exhaust purifying device system A can also be applied as part of the configuration of a cooking appliance that generates oil fumes.

[0081] Furthermore, the present invention is not limited to the specific configurations described above, and can be modified as appropriate without altering the essence of the invention.

[0082] <Summary> As described above, the above embodiment discloses the following invention. (1) An exhaust gas purification device (see Figures 1 to 11) comprises a filter that is forcibly rotated, a housing that rotatably encloses the filter, and a support member that rotatably supports the filter from the downstream side, wherein the filter has a number of holes from the peripheral side to the center, the housing is substantially cylindrical in shape that covers the periphery of the filter and is configured to be installed in the ventilation path of an exhaust duct, and the support member is supported by the housing intersecting the central axis of the filter. (2) The exhaust purifying device according to (1) (see Figures 8 to 11), characterized in that the support member is formed in a hollow shape. (3) The exhaust purifying device according to (2) (see Figures 9 to 11), characterized in that the internal space of the support member is in communication with the external space of the housing. (4) The exhaust purifying device according to (3) (see Figures 9 to 11), characterized in that the support member is formed in a substantially cylindrical shape, with one open end and the other open end connected to the inner surface of the housing, and the peripheral wall of the housing is provided with a ventilation hole communicating with the one open end and a ventilation hole communicating with the other open end. Here, the configuration described as "connecting the open end on one side and the open end on the other side to the inner surface of the housing" includes both a configuration in which at least one of the open ends is directly connected to the inner surface of the housing, and a configuration in which the open end is indirectly connected via an intermediate member, such as the cover member or mounting bracket. (5) The exhaust gas purification device according to any one of (2) to (3), characterized in that a refrigerant is circulated through the internal space of the support member to cool the support member. (6) An exhaust purifying device according to any one of (2) to (5) (see Figures 9 to 10), characterized in that it comprises a drive device for rotating the filter, and the internal space of the support member is used as a power transmission path for the drive device. (7) An exhaust gas purification device according to any one of (1) to (6) (see Figures 9 to 10), characterized in that a resistance plate is provided in close proximity to the hole located near the center of the filter from the downstream side, and this resistance plate is supported by the support member. (8) An exhaust purifying system (see Figure 1) characterized by having an exhaust purifying device described in any of (1) to (7) downstream of the intake port in the exhaust duct. (9) The exhaust purifying device system according to (8) (see Figure 1), characterized in that a blower for discharging gas is provided downstream of the exhaust purifying device in the exhaust duct. [Explanation of Symbols]

[0083] 1. Exhaust duct 1a Inlet 1b Exhaust vent 1c curve section 2 Food 3. Exhaust purifier 4. Blower 10 filters 11 holes 12 shaft holes 20 cabinets 21 Front plate part 21a Front panel opening 22 Rear plate part 22a Rear plate opening 23 First connection section 24 Second connection point 25 Peripheral wall 25a~25d side plate 25c1, 25d2, 25d3, 26d2, 27d2 Ventilation holes 25d1 Motor support hole 26a~26c Vibration damping members 26d3 End opening 27d Cover component 27d1 Axial through hole 27d3,41 Fastening device 28 Collection section 29 Frame members 30 Resistance plate 40 Support member 50 Drive unit 51 Motor section 51a Fastening device 52 Power transmission mechanism 52a Power transmission shaft 52b Rotation axis direction conversion device 52c drive shaft A Exhaust Cleaning System

Claims

1. It comprises a filter that is forcibly rotated, a housing that rotatably encloses the filter, and a support member that rotatably supports the filter from the downstream side, The aforementioned filter has numerous holes extending from the periphery to the center, The housing is substantially cylindrical in shape and covers the periphery of the filter, and is configured to be installed in the ventilation path of the exhaust duct. The exhaust gas purification device is characterized in that the support member is supported by the housing intersecting the central axis of the filter.

2. The exhaust purifying device according to claim 1, characterized in that the support member is formed in a hollow shape.

3. The exhaust purifying device according to claim 2, characterized in that the internal space of the support member is in communication with the external space of the housing.

4. The support member is formed in a substantially cylindrical shape, and one open end and the other open end are connected to the inner surface of the housing, The exhaust purifying device according to claim 3, characterized in that the peripheral wall of the housing is provided with a ventilation hole communicating with one of the open ends and a ventilation hole communicating with the other open end.

5. The exhaust purifying device according to claim 2, characterized in that a refrigerant is circulated through the internal space of the support member to cool the support member.

6. The system includes a drive device for rotating the filter, The exhaust purifier according to claim 2, characterized in that the internal space of the support member is used as a power transmission path for the drive device.

7. The exhaust gas purification device according to claim 1, characterized in that a resistance plate is provided in close proximity to the hole located near the center of the filter from the downstream side, and this resistance plate is supported by the support member.

8. An exhaust purifying system characterized by comprising an exhaust purifying device according to any one of claims 1 to 7 downstream of the intake port in the exhaust duct.

9. The exhaust purifying device system according to claim 8, characterized in that a blower for discharging gas is provided downstream of the exhaust purifying device in the exhaust duct.

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