CN110998197B

CN110998197B - Oil fume collecting device

Info

Publication number: CN110998197B
Application number: CN201880051630.8A
Authority: CN
Inventors: 阿部宽之
Original assignee: Fuji Kogyo Co Ltd
Current assignee: Fuji Kogyo Co Ltd
Priority date: 2017-08-10
Filing date: 2018-07-31
Publication date: 2021-08-17
Anticipated expiration: 2038-07-31
Also published as: JP2019035515A; MY190831A; SG11202000854SA; JP6640155B2; CN110998197A; WO2019031299A1

Abstract

The invention provides a fume collecting device which can prevent noise generated by a fan from being transmitted to a room without reducing air suction and exhaust performance and cleanness. The soot trapping device is provided with a motor (30), a fan (20) which is attached to a rotating shaft (31) of the motor and generates air flow, and a fan cover (10) which contains the fan therein, wherein the fan cover has a suction port (11) for sucking air, a discharge port (12) for discharging air, and a communication port (13) which is provided opposite to the suction port, and is provided with a sound absorbing material (40) on the side opposite to the suction port via the communication port, the communication port spatially communicates the fan and the sound absorbing material, and the outer edge (E) of the communication port is provided so as to be located at the same position as the outer diameter (L) of the fan or at a position inside the outer diameter (L) of the fan.

Description

Oil fume collecting device

Technical Field

The invention relates to an oil fume collecting device.

Background

Conventionally, there has been proposed a soot collection device in which a noise reduction measure is implemented in order to prevent sound generated by a blower (fan) of the soot collection device such as a range hood from being transmitted into a room. For example, patent document 1 discloses a range hood including a box-shaped hood body having a fan provided therein and having openings on four sides and a lower surface, a front hood provided to cover a front surface of the hood body, and a noise reduction tube having a cylindrical portion near a bottom portion and having a suction port attached to an inner surface of the front hood, and a bottomed cylindrical shape having an opening side end portion communicated with the suction port of the fan. The range hood is provided with a silencing tube with a sound absorbing material stuck on the inner side of a suction opening of a blower, and sound generated by the blower is absorbed by the sound absorbing material and is transmitted in the silencing tube, so that the sound is attenuated when the sound is transmitted to the outside of the range hood, and the range hood does not make indoor people unpleasant.

Documents of the prior art

Patent document

Patent document 1 Japanese Kokai publication Hei 03-052534

Disclosure of Invention

Problems to be solved by the invention

However, in the above range hood, since the noise-reduction tube is provided at the suction port of the blower, the ventilation resistance increases, the intake and exhaust performance of the range hood deteriorates, and new noise may be generated due to the provision of the noise-reduction tube. Further, since the suction port of the blower serves as a flow path for air containing oil, the air is easily contaminated with oil, and frequent cleaning is required.

Accordingly, the present invention provides a soot trapping device which can prevent noise generated by a fan from being transmitted to a room without deteriorating suction and exhaust performance and cleanliness.

Means for solving the problems

In order to solve the above-described problems, a soot trapping device is provided with a motor, a fan that is attached to a rotation shaft of the motor and generates air flow, and a fan cover that includes the fan therein, the fan cover having a suction port that sucks air, a discharge port that discharges air, and a communication port that is provided opposite to the suction port, the fan cover being provided with a sound absorbing material on a side opposite to the suction port with the communication port therebetween, the communication port spatially communicating the fan and the sound absorbing material, and an outer edge of the communication port being provided so as to be located at the same position as an outer diameter of the fan or located inside the outer diameter of the fan.

Accordingly, the following soot trapping device can be provided: by providing a communication port for spatially communicating the fan and the sound absorbing material and providing the sound absorbing material outside the flow path through which the air containing oil flows, the sound absorbing material is not contaminated and does not become a resistance to the flow of air, and therefore, the transmission of noise generated by the fan into the room is suppressed without reducing the performance of air suction and exhaust and the cleanliness.

Further, the sound absorbing material may be provided in the 1 st space between the communication port and the sound absorbing material.

Accordingly, by providing the sound absorbing material in the 1 st space between the communication port and the sound absorbing material, sound can be diffused and propagated through the communication port, and thus sound can be absorbed over a wider area, and sound can be effectively absorbed.

The fan may further include a power transmission plate connected to the rotating shaft, and a plurality of blades provided around the power transmission plate, wherein the power transmission plate includes a ring portion connected to the plurality of blades, a central portion connected to the rotating shaft, a spoke portion provided between the central portion and the ring portion, and a plurality of power transmission plate openings surrounded by the ring portion, the central portion, and the spoke portion.

Accordingly, by providing the opening portion in the power transmission plate, sound can be more easily transmitted to the communication port, and sound can be more absorbed.

Further, the power transmission plate may be provided closer to the communication port than a center position of the fan in the rotation axis direction.

Accordingly, by providing the power transmission plate at a position closer to the communication port than the center position of the fan, the power transmission plate does not act as resistance when discharging air, and therefore, it is possible to exhaust air more effectively and reduce noise. Further, since the distance between the power transmission plate and the sound absorbing material is shortened, sound generated in the power transmission plate can be absorbed.

Further, it may be characterized in that at least a part of the motor is provided at a position farther from the suction port than a part of the fan closest to the communication port side.

Accordingly, by providing at least a part of the motor at a position further from the suction port than the part of the fan closest to the communication port side, the motor does not become a resistance when discharging air, and therefore, it is possible to more effectively discharge air and reduce noise. Further, since the distance between the motor and the sound absorbing material is shortened, sound generated in the motor can be absorbed more effectively.

Further, the sound absorbing material may be characterized by a 2 nd space located farther from the suction port than the sound absorbing material, and the 2 nd space may be a space surrounded to attenuate sound.

Accordingly, by providing the 2 nd space surrounded for sound attenuation on the opposite side of the communication port with the sound absorbing material interposed therebetween, the sound that cannot be completely absorbed by the sound absorbing material is transmitted to the inside of the housing, and the sound that cannot be completely absorbed is absorbed by reflection in the housing, and transmission to the outside of the soot trapping device can be prevented.

Furthermore, it may be further characterized in that the 2 nd space is a closed space.

Accordingly, since the 2 nd space is closed, the noise transmitted to the 2 nd space is less likely to escape from the 2 nd space, and the sound can be more effectively absorbed.

ADVANTAGEOUS EFFECTS OF INVENTION

As described above, according to the present invention, it is possible to provide a soot collection device that suppresses noise generated by a fan from being transmitted to a room without degrading exhaust performance and cleanliness.

Drawings

Fig. 1 is a six-view diagram of a hood according to a first embodiment of the present invention. Fig. 1 (a) is a top view, fig. 1 (B) is a front view, fig. 1 (C) is a bottom view, fig. 1 (D) is a right side view, fig. 1 (E) is a rear view, and fig. 1 (F) is a left side view.

Fig. 2 is a sectional view of a range hood according to a first embodiment of the present invention, fig. 2 (a) is a sectional view taken along a-a shown in fig. 1, and fig. 2 (B) is an enlarged sectional view taken near a sound absorbing material.

Fig. 3 is a sectional view of a hood according to a first embodiment of the present invention, fig. 3 (a) is a sectional view taken along the line B-B shown in fig. 1, and fig. 3 (B) is an enlarged sectional view taken near a sound absorbing material.

Fig. 4 is a cross-sectional view of a range hood according to a modification of the first embodiment of the present invention, fig. 4 (a) is a cross-sectional view taken along a-a shown in fig. 1, and fig. 4 (B) is an enlarged cross-sectional view taken near a sound absorbing material.

Fig. 5 is a cross-sectional view of a range hood according to a modification of the first embodiment of the present invention, fig. 5 (a) is a cross-sectional view taken along the line B-B shown in fig. 1, and fig. 5 (B) is an enlarged cross-sectional view taken near a sound absorbing material.

Fig. 6 is a six-view diagram of a hood according to a second embodiment of the present invention. Fig. 6 (a) is a top view, fig. 6 (B) is a front view, fig. 6 (C) is a bottom view, fig. 6 (D) is a right side view, fig. 6 (E) is a rear view, and fig. 6 (F) is a left side view.

Fig. 7 is a sectional view of a hood according to a second embodiment of the present invention, in which fig. 7 (a) is a sectional view taken along the line a-a shown in fig. 6, and fig. 7 (B) is an enlarged sectional view taken near a sound absorbing material.

Fig. 8 is a sectional view of a hood according to a second embodiment of the present invention, fig. 8 (a) is a sectional view taken along the line B-B shown in fig. 6, and fig. 8 (B) is an enlarged sectional view taken near a sound absorbing material.

Fig. 9 is a ninth view of a range hood according to a third embodiment of the present invention, fig. 9 (a) is a top view, fig. 9 (B) is a front view, fig. 9 (C) is a bottom view, fig. 9 (D) is a right side view, fig. 9 (E) is a left side view, fig. 9 (F) is a perspective view seen obliquely from the right, fig. 9 (G) is a perspective view seen obliquely from the right, fig. 9 (H) is a perspective view seen obliquely from the left, and fig. 9 (I) is a perspective view seen obliquely from the left.

Fig. 10 is a cross-sectional view of the range hood of the third embodiment of the present invention, taken along the line a-a shown in fig. 9.

Fig. 11 is a cross-sectional view of the range hood shown in fig. 9, taken along the line a-a, according to a modification of the third embodiment of the present invention.

Detailed Description

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

< first embodiment >

A soot collection device provided in a hood 1 according to the present embodiment will be described with reference to fig. 1 to 3. The hood 1 is provided around a cooking tool (not shown), collects water vapor, oil smoke, and the like generated during cooking, and exhausts the water vapor, the oil smoke, and the like to the outside through a duct (not shown) to which a duct connection portion 6 is connected. The range hood 1 includes a main body 2 having a duct connecting portion 6, a casing 50 connected to an upper surface of the main body 2 and having a part of a motor 30 and a sound absorbing material 40 therein, a thin smoke exhaust hood portion 3 having an inner plate 4 recessed upward on an inner surface thereof for collecting water vapor, oil smoke, or the like, and a rectifying plate 5 for rectifying air between the inner plate 4 and the thin smoke exhaust hood portion. The smoke evacuation cover portion 3 is coupled to the main body 2 so as to communicate with a suction port 7 provided in the inner panel 4.

The soot trapping device is provided inside the main body 2 and the casing 50. The soot collection device includes a motor 30, a fan 20 attached to a rotating shaft 31 of the motor 30 and generating air flow, and a fan cover 10 including the fan 20 therein. The motor 30 is preferably an ac motor because it is provided in the range hood 1 installed indoors in the soot collection device of the present embodiment, but is not limited thereto, and may be a dc motor that can be used outdoors or the like. The fan 20 is a sirocco fan (sirocco fan) of high static pressure, and in the present embodiment, air containing soot and the like is sucked from the suction port 7 located below to form an exhaust flow directed in the horizontal direction. The fan 20 includes a power transmission plate 21 connected to a rotary shaft 31 of the motor 30, and a plurality of blades provided around the power transmission plate 21.

The fan cover 10 includes an intake port 11 through which air is taken in, an exhaust port 12 through which air taken in through the intake port 11 is exhausted, and a communication port 13 provided to face the intake port 11. When the motor 30 is energized and the fan 20 located inside the fan cover 10 is rotated, air containing soot and the like is sucked from the gap between the flow straightening plate 5 and the inner plate 4. The air is sucked into the fan cover 10 from the suction port 11 through the suction port 7 opened in the substantially central portion of the inner panel 4. Oil contained in the air sucked into the fan cover 10 is removed from the air by colliding with or adhering to the blades 22 of the fan 20. The air from which the oil is removed forms an exhaust flow in the centrifugal direction (horizontal direction) of the fan 20, and is discharged from the discharge port 12. The air flow (flow path) generated by the rotation of the fan 20 is a flow (flow path) which is sucked in the direction from below to above in the suction port 11, changes from there to a horizontal direction in the centrifugal direction, and is discharged from the discharge port 12.

The communication port 13 is provided on the upper surface of the fan cover 10 so as to face the suction port 11 provided on the lower surface of the fan cover 10. The fan 20 is disposed below the communication port 13, the main body of the motor 30 is disposed above the communication port 13, and the rotary shaft 31 of the motor 30 is disposed so as to cross the communication port 13. The motor 30 is attached to the upper surface of the fan cover 10, and is supported by a motor attachment jig 32 provided so as to straddle the communication port 13 at a position near 1/3 below the main body of the motor 30. As shown only in the B-B section (fig. 3 (B)), the motor mounting jig 32 is band-shaped to the extent that it can support the motor 30. The outer edge E of the communication port 13 is located at the same position as the edge formed by the outer diameter L of the fan 20 or located inside the edge formed by the outer diameter L of the fan 20, that is, at a position close to the rotary shaft 31.

In the present embodiment, the main body of the motor 30 is disposed above the communication port 13, and the rotary shaft 31 of the motor 30 is disposed so as to cross the communication port 13, but the present invention is not limited thereto, and the main body of the motor 30 may be disposed so as to enter the inside of the fan 20. However, by providing at least a part of the motor 30 to be located farther from the suction port 11 than the portion P of the fan 20 closest to the communication port 13 side as in the present embodiment, the motor 30 does not become resistance when discharging air, so that exhaust can be more effectively performed and noise can be reduced. Further, since the distance between the motor 30 and the sound absorbing material 40 is shortened, sound generated in the motor 30 can be absorbed more effectively.

The sound absorbing material 40 is provided on the side opposite to the suction port 11 with the communication port 13 interposed therebetween, and is provided on the lower surface of the motor mounting jig 32, that is, on the communication port 13 side of the motor mounting jig 32 so as to substantially cover the inside of the casing 50. By providing the sound absorbing material 40 in this manner, the communication port 13 spatially communicates the fan 20 with the sound absorbing material 40. That is, the blade 22 of the fan 20 serving as the sound generation source and the sound absorbing material 40 are in a spatial communication positional relationship via the communication port 13. Further, since the communication port 13 is located on the motor 30 side (upper side) of the fan 20, the sound absorbing material 40 which is located on the upper side of the communication port 13 and is not located in the air flow path and is disposed in the case 50 into which air does not flow is not located in the air flow path, and is therefore disposed at a position into which air containing soot and the like does not enter. The sound absorbing material 40 is, for example, a sound absorbing member or a sound absorbing and resonating member, and includes, as non-limiting examples, a fibrous sound absorbing member made of glass wool, asbestos, metal fibers, or the like, a porous sound absorbing member made of polyurethane foam, melamine foam, powder sintered, or the like, and a member utilizing interference of sound in a space made of an interference type silencer such as a perforated plate, a helmholtz type silencer, a side-branch silencer, or the like.

Thus, the following soot trapping device can be provided: since the communication port 13 for spatially communicating the fan 20 and the sound absorbing material 40 is provided to facilitate sound transmission and the sound absorbing material 40 is provided outside the flow path of the air containing oil, the sound absorbing material 40 is not contaminated and does not become resistance to the air flow, and thus, the noise generated by the fan 20 is prevented from being transmitted to the room without degrading the air intake and exhaust performance and the cleanliness.

The sound absorbing material 40 is provided between the communication port 13 and the 1 st space S1. That is, the communication port 13 is provided at a position crossing the rotation shaft 31 of the motor 30, and the sound absorbing material 40 is located at a height of about 1/3 from the lower side of the main body of the motor 30, and therefore the 1 st space S1 of about the height 1/3 of the main body of the motor 30 is provided across the inner surface of the housing 50. By providing the sound absorbing material 40 in the 1 st space S1 between the sound absorbing material 40 and the communication port 13 in this manner, if there is an obstacle blocking the propagation of sound between the sound absorbing material 40 and the communication port 13, sound can be absorbed over a wider area because the sound is diffused and propagated through the communication port 13, and sound can be absorbed efficiently. The sound absorbing material 40 may be provided by stacking a plurality of sheets. In this case, a gap (space) is preferably provided between the sound absorbing material 40 and the sound absorbing material 40. The edge of the sound absorbing material 40 is preferably located outside (on the side away from the rotary shaft 31) the outer edge E of the communication port 13. This allows sound to be more effectively absorbed from the communication port 13 to the outside of the fan cover 10.

The soot trapping device includes the casing 50 so as to form the 2 nd space S2 located further away from the suction port 11 than the sound absorbing material 40, that is, located above and communicating with the 1 st space S1 at both ends of the sound absorbing material 40. In this way, by providing the 2 nd space S2 partially communicating with the 1 st space S1 on the opposite side of the communication port 13 with the sound absorbing material 40 interposed therebetween, the 2 nd space can be a space surrounded for attenuating sound. "enclosed for sound attenuation" means that there is a space on the back surface of the sound absorbing material, and there is an enclosed space on the back surface of the sound absorbing material so that sound incident on the space reflects and interferes with each other to attenuate sound. Accordingly, by providing the 2 nd space surrounded for sound attenuation on the opposite side of the communication port with the sound absorbing material interposed therebetween, the sound that cannot be completely absorbed by the sound absorbing material is transmitted to the inside of the housing, and the sound that cannot be completely absorbed is absorbed by reflection in the housing, and transmission to the outside of the soot trapping device can be prevented. The sound absorbing material has a gap between the sound absorbing material and the casing and between the sound absorbing material and the motor, and the 2 nd space is a non-closed space, but the present invention is not limited thereto, and a gap may not be formed, and the 2 nd space may be a closed space. Accordingly, since the 2 nd space is closed, the sound transmitted to the 2 nd space is less likely to escape from the 2 nd space, and the sound can be more effectively absorbed.

The fan 20 includes a power transmission plate 21 connected to the rotary shaft 31 and a plurality of blades 22 provided around the power transmission plate 21, and the power transmission plate 21 includes a ring portion 211 formed on the outermost periphery of the power transmission plate 21 and connected to the plurality of blades 22, a center portion 212 actually connected to the rotary shaft 31, a spoke portion 213 provided between the center portion 212 and the ring portion 211, and a plurality of power transmission plate openings 214 surrounded by the ring portion 211 and the center portion 212 and the spoke portion 213. For example, if the number of the spokes 213 is 3, the number of the power transmission plate openings 214 is also 3, and if the number of the spokes 213 is 4, the number of the power transmission plate openings 214 is also 4. The spokes 213 are required to have strength for transmitting the rotational driving force of the motor 30 from the central portion 212 to the ring portion 211, but in order to increase the opening ratio of the power transmission plate 21, the width of the spokes 213 is preferably narrowed so as not to reduce the total area of the power transmission plate opening 214. By providing the power transmission plate opening 214 in the power transmission plate 21 in this manner, the sound of the fan 20 is more easily transmitted to the communication port 13, and the sound can be further absorbed.

In the present embodiment, the power transmission plate 21 is located closest to the communication port 13 side of the fan 20 in the direction of the rotation shaft 31, but is not limited to this, and may be located closer to the communication port 13 side than the center position of the fan 20. By providing the power transmission plate 21 at a position closer to the communication port 13 than the center position of the fan 20 in this manner, the power transmission plate 21 does not act as resistance when discharging air, and therefore, air can be discharged more efficiently and noise can be reduced. Further, since the distance between the power transmission plate 21 and the sound absorbing material 40 is shortened, sound generated in the power transmission plate 21 can be absorbed more effectively.

< modification of the first embodiment >

A soot collection device provided in a range hood 1' according to the present embodiment will be described with reference to fig. 4 to 5. In order to avoid redundant description, differences from the above-described embodiments will be mainly described. The range hood 1' includes a main body 2 having a duct connecting portion 6, a casing 50 connected to an upper surface of the main body 2 and having a part of a motor 30 therein, a thin smoke exhaust hood portion 3 having an inner plate 4 recessed upward on an inner surface thereof for collecting steam, oil smoke, or the like, and a rectifying plate 5 for rectifying air between the inner plate 4 and the thin smoke exhaust hood portion.

The soot trapping device is provided inside the main body 2 and the casing 50. The soot collection device includes a motor 30, a fan 20 attached to a rotating shaft 31 of the motor 30 and generating air flow, and a fan cover 10 including the fan 20 therein. The fan 20 is a sirocco fan (sirocco fan) of high static pressure, and in the present embodiment, air containing soot and the like is sucked from the suction port 7 located below to form an exhaust flow directed in the horizontal direction. The fan 20 includes a power transmission plate 21 connected to a rotary shaft 31 of the motor 30, and a plurality of blades provided around the power transmission plate 21.

The communication port 13 is provided on the upper surface of the fan cover 10 so as to face the suction port 11 provided on the lower surface of the fan cover 10. The fan 20 is disposed below the communication port 13, the main body of the motor 30 is disposed above the communication port 13, and the rotary shaft 31 of the motor 30 is disposed so as to cross the communication port 13. The outer edge E of the communication port 13 is located at the same position as the edge formed by the outer diameter L of the fan 20 or located inside the edge formed by the outer diameter L of the fan 20, that is, at a position close to the rotary shaft 31.

The sound absorbing material 40' is provided on the inner surface side of the main body 2 opposite to the suction port 11 and near the connection portion with the casing 50 through the communication port 13, and is provided in a range larger than the casing 50. By providing the sound absorbing material 40 'in this manner, the communication port 13 spatially communicates the fan 20 with the sound absorbing material 40'. That is, the blades 22 of the fan 20 serving as the sound generation source and the sound absorbing material 40' are in a spatial communication relationship with each other through the communication port 13. Further, since the communication port 13 is located on the motor 30 side (upper side) of the fan 20, the sound absorbing material 40' which is located on the upper side of the communication port 13 and is not located in the flow path of the air is disposed at a position not located in the flow path of the air.

Thus, the following soot trapping device can be provided: in order to facilitate sound transmission, a communication port 13 for spatially communicating the fan 20 and the sound absorbing material 40 ' is provided, and the sound absorbing material 40 ' is provided outside a flow path through which air containing oil flows, so that the sound absorbing material 40 ' is not contaminated and does not become resistance to air flow, and therefore, noise generated by the fan 20 is prevented from being transmitted into a room without degrading air intake and exhaust performance and cleanliness.

The sound absorbing material 40' is provided between the communication port 13 and the 1 st space S1. That is, since the sound absorbing material 40 'is provided on the inner surface side of the main body 2, the 1 st space S1 is provided between the communication port 13 and the sound absorbing material 40'. By providing the sound absorbing material 40' S in S1 in the space 1 between the communication port 13 in this way, sound can be diffused and propagated through the communication port 13, and thus sound can be absorbed over a wider area, and sound can be effectively absorbed. The edge of the sound absorbing material 40' is preferably located outside the outer edge E of the communication port 13 (on the side away from the rotary shaft 31). This allows sound to be more effectively absorbed from the communication port 13 to the outside of the fan cover 10.

The oil smoke collecting device includes the casing 50 so as to form the 2 nd space S2 that is located at a position farther from the suction port 11 than the sound absorbing material 40', i.e., located above and closed. By providing the closed 2 nd space S2 on the opposite side of the communication port 13 with the sound absorbing material 40 'interposed therebetween in this manner, the sound that has not been completely absorbed by the sound absorbing material 40' is transmitted to the inside of the casing 50, and the sound that has not been completely absorbed is absorbed by reflection in the casing 50, and can be prevented from being transmitted to the outside of the soot trapping device.

< second embodiment >

A soot collection device provided in the hood 1A according to the present embodiment will be described with reference to fig. 6 to 8. In order to avoid redundant description, differences from the above-described embodiments will be mainly described. The range hood 1A includes a main body 2A having a duct connecting portion 6 and including a smoke collecting device therein, a thin smoke exhaust hood portion 3 having an inner plate 4 recessed upward on an inner surface thereof for collecting water vapor, smoke, and the like, and a rectifying plate 5 for rectifying air between the inner plate 4 and the smoke exhaust hood portion. The smoke evacuation cover portion 3 is coupled to the main body 2A so as to communicate with a suction port 7 provided in the inner panel 4.

The oil smoke collecting device is provided inside the main body 2A. The soot collection device includes a motor 30, a fan 20 attached to a rotating shaft 31 of the motor 30 and generating air flow, and a fan cover 10 including the fan 20 therein. The fan 20 is a sirocco fan (sirocco fan) of high static pressure, and in the present embodiment, air containing soot and the like is sucked from the suction port 7 located below to form an exhaust flow directed in the horizontal direction. The fan 20 includes a power transmission plate 21 connected to a rotary shaft 31 of the motor 30, and a plurality of blades provided around the power transmission plate 21.

In the present embodiment, the main body of the motor 30 is disposed above the communication port 13, and the rotary shaft 31 of the motor 30 is disposed so as to cross the communication port 13, but the present invention is not limited thereto, and the main body of the motor 30 may be disposed so as to enter the inside of the fan 20. However, by providing at least a part of the motor 30 to be located farther from the suction port 11 than the portion P of the fan 20 closest to the communication port 13 side as in the present embodiment, the motor 30 does not become resistance when discharging air, so that exhaust can be more effectively performed and noise can be reduced. Further, since the distance between the motor 30 and the sound absorbing material 40A is shortened, sound generated in the motor 30 can be absorbed more effectively.

The sound absorbing material 40A is provided on the opposite side of the suction port 11 with the communication port 13 interposed therebetween, and is provided so as to substantially cover the inside of the main body 2A so as to cross the main body of the motor 30. By providing the sound absorbing material 40A in this manner, the communication port 13 spatially communicates the fan 20 with the sound absorbing material 40A. That is, the blade 22 of the fan 20 serving as the sound generation source and the sound absorbing material 40A are in a spatial communication positional relationship via the communication port 13. Further, since the communication port 13 is located on the motor 30 side (upper side) of the fan 20, the sound absorbing material 40A which is located on the upper side of the communication port 13 and is not located in the air flow path and is disposed in the main body 2A into which air does not flow is not located in the air flow path, and is therefore disposed at a position into which air containing soot and the like does not enter.

Thus, the following soot trapping device can be provided: since the communication port 13 for spatially communicating the fan 20 and the sound absorbing material 40A is provided to facilitate sound transmission and the sound absorbing material 40A is provided outside the flow path of the air containing oil, the sound absorbing material 40A is not contaminated and does not become resistance to the air flow, and thus, the noise generated by the fan 20 is prevented from being transmitted to the room without degrading the air intake and exhaust performance and the cleanliness.

The sound absorbing material 40A is provided between the communication port 13 and the 1 st space S1. That is, since the communication port 13 is provided at a position crossing the rotation shaft 31 of the motor 30 and the sound absorbing material 40A is provided crossing the main body of the motor 30, it crosses the 1 st space S1 of the inner surface of the main body 2A, which is about the height 1/3 of the main body where the motor 30 is provided. By providing the sound absorbing material 40A at S1 with the communication port 13 interposed therebetween in the 1 st space in this manner, sound is diffused and propagated through the communication port 13, and thus sound can be absorbed over a wider area, and sound can be effectively absorbed.

In the soot trapping device, the sound absorbing material 40A is disposed inside the main body 2A so as to form the 2 nd space S2 that is located farther from the suction port 11 than the sound absorbing material 40A, i.e., located above and closed. By providing the closed 2 nd space S2 on the opposite side of the communication port 13 with the sound absorbing material 40A interposed therebetween in this manner, the sound that has not been completely absorbed by the sound absorbing material 40A is transmitted to the inside of the main body 2A, and the sound that has not been completely absorbed is absorbed by reflection in the main body 2A, and can be prevented from being transmitted to the outside of the soot trapping device.

< third embodiment >

A soot collection device provided in a range hood 1B according to the present embodiment will be described with reference to fig. 9 to 10. In order to avoid redundant description, differences from the above-described embodiments will be mainly described. The range hood 1B includes a main body 2B having a duct connecting portion 6 and including a smoke collecting device therein, a thin smoke exhaust hood portion 3 having an inner plate 4 recessed upward on an inner surface thereof for collecting water vapor, smoke, and the like, and a rectifying plate 5 for rectifying air between the inner plate 4 and the smoke exhaust hood portion. The smoke evacuation cover portion 3 is coupled to the main body 2B so as to communicate with a suction port 7 provided in the inner panel 4.

The oil smoke collecting device is provided inside the main body 2B. The soot collection device includes a motor 30, a fan 20 attached to a rotating shaft 31 of the motor 30 and generating air flow, and a fan cover 10B including the fan 20 therein. Unlike the above-described embodiment, the motor 30 is disposed such that the rotation shaft 31 becomes the horizontal direction. The fan 20 is a sirocco fan (sirocco fan) of high static pressure, and in the present embodiment, air containing soot and the like is sucked from the suction port 7 located below to form an exhaust flow directed in the vertical direction. The fan 20 includes a power transmission plate 21 connected to a rotary shaft 31 of the motor 30, and a plurality of blades provided around the power transmission plate 21.

The fan cover 10B includes an intake port 11 through which air is taken in, a discharge port through which air taken in through the intake port 11 is discharged, and a communication port 13 provided to face the intake port 11. When the motor 30 is energized and the fan 20 located inside the fan cover 10B is rotated, air containing soot and the like is sucked from the gap between the flow straightening plate 5 and the inner plate 4. The air is sucked into the fan cover 10B from the suction port 11 that is open in a substantially vertical direction through the suction port 7 and the flue 8 that are open at a substantially central portion of the inner panel 4. Oil contained in the air sucked into fan cover 10B collides with or adheres to blades 22 of fan 20 and is removed from the air. The air from which the oil is removed forms an exhaust flow in the centrifugal direction (vertical direction) of the fan 20, and is discharged from the discharge port. The air flow (flow path) generated by the rotation of the fan 20 is a flow (flow path) that is sucked into the suction port 11 in a direction from the front side to the rear side (a direction from the left to the right in the drawing of fig. 10), and is discharged from the discharge port in a direction perpendicular to the centrifugal direction.

The communication port 13 is provided on the rear surface side of the fan cover 10B so that the front surface side of the fan cover 10B faces the suction port 11. The fan 20 is disposed on the front side of the communication port 13, the main body of the motor 30 is disposed on the rear side of the communication port 13, and the rotary shaft 31 of the motor 30 is disposed so as to cross the communication port 13. The outer edge of the communication port 13 is provided at the same position as the edge formed by the outer diameter of the fan 20 or at a position inside the edge formed by the outer diameter of the fan 20, that is, at a position close to the rotary shaft 31.

The sound absorbing material 40B is provided on the opposite side of the suction port 11 with the communication port 13 interposed therebetween and is in contact with the entire inner surface of the rear surface side of the main body 2B. By providing the sound absorbing material 40B in this manner, the communication port 13 spatially communicates the fan 20 with the sound absorbing material 40B. That is, the blade 22 of the fan 20 serving as the sound generation source and the sound absorbing material 40B are in a spatial communication positional relationship via the communication port 13. Further, since the communication port 13 is located on the motor 30 side (rear side) of the fan 20, the communication port 13 is located on the rear side of the main body 2B so as not to be located on the air flow path and so as not to be disposed in the main body 2B into which air flows, and the sound absorbing material 40B disposed in contact with the inner surface on the rear side is not present on the air flow path and so is disposed at a position where air containing soot and the like does not enter.

Thus, the following soot trapping device can be provided: since the communication port 13 for spatially communicating the fan 20 and the sound absorbing material 40B is provided to facilitate sound transmission and the sound absorbing material 40B is provided outside the flow path of the air containing oil, the sound absorbing material 40B is not contaminated and does not become resistance to the air flow, and thus, the noise generated by the fan 20 is prevented from being transmitted to the room without degrading the air intake and exhaust performance and the cleanliness.

The sound absorbing material 40B is provided between the communication port 13 and the 1 st space S1. That is, the communication port 13 is provided at a position crossing the rotation shaft 31 of the motor 30, and the sound absorbing material 40B is disposed in contact with the entire inner surface of the rear surface side of the main body 2B, so that the 1 st space S1 is provided across the inner surface of the main body 2B on the rear surface side of the communication port 13. By providing the sound absorbing material 40B S1 between the communication port 13 and the 1 st space in this manner, sound is diffused and propagated through the communication port 13, and thus sound can be absorbed over a wider area, and sound can be effectively absorbed.

< modification of the third embodiment >

A soot collection device provided in a range hood 1B' according to the present embodiment will be described with reference to fig. 11. In order to avoid redundant description, differences from the above-described embodiments will be mainly described. The hood 1B 'is the same as the third embodiment described above except for the arrangement of the sound absorbing material 40B' in the main body 2B described below.

The sound absorbing material 40B' is provided on the opposite side of the suction port 11 and on the back surface side of the main body 2B through the communication port 13 so as not to contact the inner surface. By providing the sound absorbing material 40B 'in this manner, the communication port 13 spatially communicates the fan 20 with the sound absorbing material 40B'. That is, the blades 22 of the fan 20 serving as the sound generation source and the sound absorbing material 40B' are in a spatial communication relationship with each other through the communication port 13. Further, since the communication port 13 is located on the motor 30 side (rear surface side) of the fan 20, the sound absorbing material 40B' which is located on the upper side of the communication port 13 and is not located in the air flow path and is disposed in the main body 2B into which air does not flow is not located in the air flow path, and is therefore disposed at a position into which air containing soot and the like does not enter.

Thus, the following soot trapping device can be provided: in order to facilitate sound transmission, a communication port 13 for spatially communicating the fan 20 and the sound absorbing material 40B ' is provided, and the sound absorbing material 40B ' is provided outside a flow path through which air containing oil flows, and the sound absorbing material 40B ' does not become contaminated and does not become resistance to air flow, so that noise generated by the fan 20 is prevented from being transmitted to the room without degrading air intake and exhaust performance and cleanliness.

The sound absorbing material 40B' is provided between the communication port 13 and the 1 st space S1. That is, the communication port 13 is provided at a position crossing the rotation shaft 31 of the motor 30, and the sound absorbing material 40B' is disposed on the back surface side of the main body 2B and in proximity to the back surface of the motor 30, so that the 1 st space S1 is provided across the width of the main body of the motor 30 of the main body 2B on the back surface side of the communication port 13. By providing the sound absorbing material 40B' S of S1 between the communication port 13 and the 1 st space in this manner, sound can be diffused and propagated through the communication port 13, and thus sound can be absorbed over a wider area, and sound can be effectively absorbed.

In the soot trapping device, the sound absorbing material 40B 'is disposed inside the main body 2B so as to form the 2 nd space S2 that is located farther from the suction port 11 than the sound absorbing material 40B', i.e., is located on the rear side and is closed. By providing the closed 2 nd space S2 on the opposite side of the communication port 13 with the sound absorbing material 40B 'interposed therebetween in this manner, the sound that has not been completely absorbed by the sound absorbing material 40B' is transmitted to the inside of the main body 2B, and thus the sound that has not been completely absorbed is absorbed by reflection in the main body 2B, and can be prevented from being transmitted to the outside of the soot trapping device. In the present embodiment, the 2 nd space S2 is closed, but may partially communicate with the 1 st space S1.

The present invention is not limited to the illustrated embodiments, and can be implemented with configurations within the scope of the contents described in the items without departing from the scope of the claims. That is, although the present invention has been described mainly with reference to specific embodiments and drawings, those skilled in the art can add various modifications in the number and other detailed configurations to the above-described embodiments without departing from the technical spirit and purpose of the present invention.

For example, the above-described smoke collection devices are all smoke collection devices provided in range hoods, but may be provided in electric lamps provided above dining tables.

Description of the reference numerals

1-hood, 2-body, 3-hood part, 4-inner panel, 5-cowling panel, 6-flue connection, 7-suction inlet, 8-flue, 10-fan cover, 11-suction inlet, 12-discharge outlet, 13-communication port, 20-fan, 21-power transmission panel, 211-ring, 212-center, 213-spoke, 214-power transmission panel opening, 22-blade, 30-motor, 31-rotation axis, 32-motor mounting fixture, 40-sound absorbing material, 50-housing, S1-1 st space, S2-2 nd space, outer edge of E-communication port, outer diameter of L-fan, P-fan closest to communication port side.

Claims

1. An oil smoke collecting device is provided with:

a motor;

a fan attached to a rotating shaft of the motor to generate air flow; and

a fan cover containing the fan inside,

the oil fume collecting device is characterized in that,

the fan cover has:

a suction port for sucking the air;

an exhaust port through which the air is exhausted; and

a communication port provided opposite to the suction port and not located in a flow path of a flow path, which is an air flow generated by the rotation of the fan,

a sound absorbing material is provided on the opposite side of the suction port with the communication port interposed therebetween,

the communication port spatially communicates the fan with the sound-absorbing material,

the outer edge of the communication opening is provided at the same position as the outer diameter of the fan or at a position inward of the outer diameter of the fan.

2. The fume capture device of claim 1,

the sound absorbing material and the communication port are provided with a 1 st space therebetween.

3. The fume collecting device according to claim 1 or 2,

the fan has a power transmission plate connected to the rotating shaft and a plurality of blades provided around the power transmission plate,

the power transmission plate has a ring portion connected to the plurality of blades, a central portion connected to the rotating shaft, a spoke portion provided between the central portion and the ring portion, and a plurality of power transmission plate openings surrounded by the ring portion, the central portion, and the spoke portion.

4. The fume capture device of claim 3,

the power transmission plate is provided closer to the communication port than a center position of the fan in the rotation axis direction.

5. The fume capture device of claim 1,

at least a part of the motor is disposed at a position farther from the suction port than a portion of the fan closest to the communication port side.

6. The fume capture device of claim 1,

the sound absorbing material has a 2 nd space located farther from the suction port than the sound absorbing material, and the 2 nd space is a space surrounded to attenuate sound.

7. The fume capture device of claim 6,

the 2 nd space is a closed space.