JP2021120599A - Range hood - Google Patents

Abstract

To provide a range hood which can efficiently collect oil contents by rotating a filter at high speed and suppress noise occurring during operation.SOLUTION: In a range hood, a filter 4 having holes 42 through which air passes is provided at an air flow passage in a hood. The filter 4 is rotated at high speed to efficiently collect oil contents contained in the air with the filter 4. An airflow stopper member 6 facing the holes 42 at the rotation center side of the filter 4 is provided at the downstream side of the filter 4 in the passage and thereby increases ventilation resistance of air passing through the holes 42 at the rotation center side of the filter 4 to reduce a maximum speed of the air passing through the holes 42 and suppress noise during operation.SELECTED DRAWING: Figure 6

Description

The present invention relates to a range hood that collects and exhausts oily smoke and the like generated by cooking.

As a range hood that collects and exhausts oil smoke and the like generated by cooking, a microwave oven that collects oil contained in oil smoke with a filter has been proposed.
For example, in Patent Document 1, a filter having a hole for passing air is rotatably provided on the upstream side of the flow path of the air flow generated by the fan, and the filter is rotated at high speed by a motor. Therefore, a range hood has been proposed that enables efficient collection of oil contained in oil smoke.

Japanese Patent No. 5631860

When the filter rotates at high speed, the noise generated when the range hood is operated becomes louder than that when the filter does not rotate, which is one of the factors that make the user uncomfortable.
It is presumed that the noise increases as follows.
Since the peripheral speed of the rotating filter is slow on the center of rotation side and fast on the outer peripheral side, the ventilation resistance when air containing oil smoke passes through the holes of the filter is small on the center side of rotation and large on the outer peripheral side, so that the air containing oil smoke rotates. It passes through the hole on the central side at a high speed and passes through the hole on the outer peripheral side at a slow speed. In this way, the speed of passing through the holes of the air filter containing oil smoke differs between the holes on the center of rotation side and the holes on the outer peripheral side, and the maximum speed of passing through the holes of the air containing oil smoke is high, so that a large noise is generated. It is thought that it will occur.

The present invention has been made to solve the above problems, and an object of the present invention is to efficiently collect oil by rotating the filter at high speed and to suppress noise generated during operation. It is to provide a microwave oven hood.

The range hood of the present invention has a hood, a fan that generates an air flow in the hood, and a hole that is rotatably provided upstream of the fan in the flow path of the air flow and through which the air passes. A filter having a filter and a filter motor for rotating the filter are provided, and the fan generates an air flow, and the filter motor rotates the filter at high speed so that the air passes through the holes of the filter. Therefore, it is a range hood in which the oil contained in the air is collected by the filter.
An air flow stop member facing the hole on the rotation center side of the filter is provided on the downstream side of the filter in the flow path, and is between the filter side surface of the air flow stop member and the air flow stop member side surface of the filter. The range hood is characterized by having an air passage through which air passes through a hole on the rotation center side of the filter.

In the range hood of the present invention, the filter is a ventilation portion having a non-ventilated portion at the center of rotation and the holes around the center of rotation, and the holes on the center of rotation of the filter are the ventilated portions. A range hood having holes in the range of 30% or more and 60% or less of the length from the inner circumference to the outer circumference of the portion can be used.

In the range hood of the present invention, the filter may be circular, and the air flow stop member may be a circular range hood centered on the center of rotation of the filter.
According to this range hood, it is possible to equalize the ventilation resistance of air passing through a plurality of holes arranged in the circumferential direction in the holes on the rotation center side of the filter.

In the range hood of the present invention, the side surface of the air flow blocking member of the filter and the side surface of the filter of the air flow blocking member may be parallel to each other.
According to this range hood, it is possible to equalize the ventilation resistance when passing through the air passage of the air passing through the plurality of holes arranged in the inner and outer peripheral directions in the holes on the rotation center side of the filter.

In the range hood of the present invention, the range hood may have a ring-shaped convex portion centered on the rotation center of the filter on the side surface of the filter of the air flow stop member.
According to this range hood, the maximum speed of the air passing through the holes becomes slower, so that the noise generated during the operation of the range hood can be further suppressed.

In the range hood of the present invention, the filter motor can be a range hood attached to the air flow stop member.
According to this range hood, since the air flow stop member also serves as the motor mount of the filter motor, the motor mount is not required, and the air flow stop member may be mounted, and the number of members constituting the range hood is increased. The cost of the range hood is reduced, the man-hours required for assembling the range hood are also reduced, and the range hood can be made to suppress the noise generated during operation without significantly increasing the price.

In the range hood of the present invention, the filter motor is attached to the opposite side surface of the air flow stop member, and the filter motor may be a range hood having a diameter smaller than that of the air flow stop member. can.
According to this range hood, the filter motor does not affect the air flow through the filter holes.

According to the range hood of the present invention, oil can be efficiently collected by rotating the filter at high speed, and the maximum speed of air passing through the holes of the filter is slow, so that noise generated during operation of the range hood is suppressed. can.

It is a front view which shows the embodiment of the range hood of this invention. It is a bottom view of the range hood shown in FIG. FIG. 5 is an enlarged cross-sectional view taken along the line AA of the range hood shown in FIG. It is a bottom view of the range hood in the state where the straightening vane of the range hood shown in FIG. 2 is removed. It is a bottom view of the range hood in the state where the oil pan and the filter of the range hood shown in FIG. 4 are removed. It is the B part enlarged view of the range hood shown in FIG. It is a perspective view of the state where the oil pan, the filter, the inner panel, the air flow stop member, and the filter motor are removed. It is a bottom view which shows the size of the air flow stop member with respect to a filter. It is a front view of the air flow stop member. It is a bottom view of the air flow stop member. It is a right side view of the air flow stop member shown in FIG. FIG. 10 is a cross-sectional view taken along the line CC of the air flow stop member shown in FIG.

The overall configuration of the range hood of the present invention will be described with reference to FIGS. 1, 2, 3, 4, and 5. FIG. 1 is a front view showing an embodiment of the range hood of the present invention, FIG. 2 is a bottom view of the range hood shown in FIG. 1, and FIG. 3 is an enlarged cross-sectional view taken along the line AA of the range hood shown in FIG. FIG. 4 is a bottom view of the range hood with the rectifying plate of the range hood shown in FIG. 2 removed, and FIG. 5 is a bottom view of the range hood with the oil pan and the filter of the range hood shown in FIG. 4 removed. ..
As shown in FIGS. 1 and 2, the hood 2 of the range hood 1 has a lower hood 2a and an upper hood 2b.
The lower hood 2a is composed of an upper surface plate 20, a peripheral plate 21, a lower surface flange 22, and an inner surface panel 23 having an upwardly recessed shape attached to the lower surface flange 22, and the central portion of the lower surface is flat and upwardly recessed. It has a box shape.
The straightening vane 24 is attached to the recessed portion 23a of the inner panel 23.
The straightening vane 24 is smaller than the recessed portion 23a of the inner surface panel 23, and there is a gap a between the outer peripheral surface 24a of the straightening vane 24 and the opening peripheral surface 23a-1 of the recessed portion 23a of the inner surface panel 23.

As shown in FIG. 3, there is a space b between the bottom surface 23a-2 of the recessed portion 23a of the inner panel 23 and the straightening vane 24, and the space b and the above-mentioned gap a form a passage 25 through which air flows. doing. The top plate 20 has an opening 26, and the inner panel 23 has an air flow port 27.
The upper hood 2b has a box shape with an open lower surface, and is attached around the opening 26 in the upper surface plate 20 of the lower hood 2a. The inside of the upper hood 2b communicates with the passage 25 between the inner surface panel 23 and the rectifying plate 24 through the upper opening 26 of the upper surface plate 20 and the air flow port 27 of the inner surface panel 23, and the passage 25 and the air flow port 27 The opening 26 and the inside of the upper hood 2b form a flow path through which air flows into the hood 2.

As shown in FIG. 3, the range hood 1 is for a fan 3 that generates an air flow in the hood 2, a filter 4 that is rotatably provided in the flow path of the air flow, and a filter that rotates the filter 4. It includes an air flow stop member 6 that also serves as a motor 5, a motor mount for mounting a filter motor 5, an oil pan 7, and the like.
The fan 3 is provided in the upper hood 2b and is rotated by the fan motor 30. As the fan 3 rotates, air is sucked into the passage 25 as shown by the arrow c, and the sucked air passes through the hole (described later) of the filter 4 and the upper part through the air flow port 27 and the opening 26. It flows into the hood 2b. The air flowing in the upper hood 2b is exhausted to the outside by the fan 3.

The fan 3 of the embodiment is a sirocco fan, and the fan is rotatably provided in the fan case 31. By rotating the fan 3, the air in the upper hood 2b is sucked into the fan case 31 from the suction port 32 of the fan case 31. , The fan case 31 is exhausted from the discharge port 33 to the outside through a pipe (not shown).
The air in the embodiment is air containing oil smoke or the like generated by cooking, and the air contains oil.
The fan 3 may be a propeller fan. That is, the fan 3 may be any one that generates an air flow in the hood 2.
The hood 2 is not limited to the one having the lower hood 2a and the upper hood 2b. For example, the hood 2 can be formed only by the lower hood 2a, and the fan case 31 can be attached to the upper surface plate 20 thereof.

The filter 4, the filter motor 5, the air flow stop member 6, and the oil pan 7 are generated in the hood 2 and flow into the air flow path from the upstream side to the downstream side. The stop member 6 and the filter motor 5 are provided so as to be sequentially displaced in the air flow direction in this order.
The oil pan 7 stores the oil content collected by the filter 4. The oil pan 7 is located on the most upstream side of the air flow path, and when the straightening vane 24 is removed as shown in FIG. 4, the entire oil pan 7 can be visually recognized. In the embodiment, the oil pan 7 is attached to the bottom surface 23a-2 of the recessed portion 23a of the inner surface panel 23.
The filter 4 has a hole 42 through which air flowing through the flow path in the hood 2 passes. The filter 4 is rotatably provided on the upstream side of the air flow stop member 6 in the flow path of the air flow generated in the hood 2 and on the downstream side of the oil pan 7, and is filtered by removing the straightening vane 24. 4 can be visually recognized. In the embodiment, the filter 4 is provided so as to be located below the bottom surface 23a-2 of the recessed portion 23a of the inner surface panel 23. Details of the filter 4 will be described later.

The air flow stop member 6 serves to stop the flow of air that has passed through the hole 42 of the filter 4. The air flow stop member 6 is provided on the downstream side of the filter 4 in the flow path of the air flow generated in the hood 2, and as shown in FIG. 3, the air flow stop member 6 is provided on the upper surface of the inner surface panel 23. It is attached.
As shown in FIG. 5, when the oil pan 7 and the filter 4 are removed, the air flow stop member 6 can be visually recognized from the air flow port 27 of the inner panel 23.
As shown in FIG. 3, the filter motor 5 is attached to the air flow stop member 6, and the filter 4 is connected to the rotation shaft 5a of the filter motor 5.

The microwave oven hood of the embodiment collects oil contained in air as follows.
By rotating the fan 3 with the fan motor 30 and rotating the filter 4 at high speed with the filter motor 5, the air containing oily smoke generated by cooking is the flow of the air generated in the hood 2. Although it flows through the road and is exhausted to the outside, the oil contained in the air is efficiently collected by the filter 4 by passing through the hole 42 of the rotating filter 4. The oil collected in the filter 4 scatters to the outer peripheral side due to the rotation of the filter 4 and collects in the oil pan 7.
By setting the size and rotation speed of the holes 42 of the filter 4 as follows, it is possible to provide a range hood having high oil collection efficiency in a state where the pressure loss is small.

In the first setting, the opening dimension (diameter) of the hole of the filter 4 in the circumferential direction is 0.75 mm or less, and the rotation speed of the filter 4 is 230 rpm or more.
In the second setting, the opening dimension (diameter) of the hole of the filter 4 in the circumferential direction is 1.00 mm or less, and the rotation speed of the filter 4 is 310 rpm or more.
In the third setting, the opening dimension (diameter) of the hole of the filter 4 in the circumferential direction is 1.50 mm or less, and the rotation speed of the filter 4 is 460 rpm or more.
In the fourth setting, the opening dimension (diameter) of the hole of the filter 4 in the circumferential direction is 2.00 mm or less, and the rotation speed of the filter 4 is 620 rpm or more.
In the fifth setting, the opening dimension (diameter) of the hole of the filter 4 in the circumferential direction is 5.00 mm or less, and the rotation speed of the filter 4 is 1500 rpm or more.

Next, the details of each member will be described with reference to FIGS. 6 to 8. FIG. 6 is an enlarged view of part B of the range hood shown in FIG. 3, FIG. 7 is a perspective view of a state in which an oil pan, a filter, an inner panel, an air flow stop member, and a filter motor are removed, and FIG. 8 is a perspective view of a filter. It is a bottom view which shows the size of the air flow stop member.
As shown in FIGS. 6 and 7, the oil pan 7 has an opening 70 having substantially the same shape as the air flow port 27 of the inner panel 23 and having substantially the same size, and has substantially the same shape as the opening 70. The bottom plate 71, the annular outer peripheral side upward plate 72 continuous with the outer periphery of the bottom plate 71, and the annular inner peripheral side upward plate 73 continuous with the periphery of the opening 70 of the bottom plate 71 have a U-shaped cross section. It is a ring of. The oil pan 7 is attached to the inner panel 23.

As shown in FIG. 8, the filter 4 has a circular shape, the center of rotation is a non-ventilated portion 40 through which air does not pass, the non-ventilated portion 40 is surrounded by a vented portion 41, and the vented portion 41 has a hole 42. .. A large number of holes 42 are formed at intervals in the circumferential direction and the inner / outer peripheral direction (diameter direction) of the filter 4. A connected member 43 for connecting the filter 4 to the rotating shaft 5a is attached to the non-ventilated portion 40 of the filter 4.
The rotation center portion of the filter 4 is a portion around the rotation center 4a of the filter 4. The periphery of the non-ventilated portion 40 is a portion between the outer circumference 40a of the non-ventilated portion 40 and the outer circumference 4b of the filter 4.
The hole 42 has a slit shape curved in an arc shape from the rotation center 4a of the filter 4 toward the outer circumference 4b, and the width of the hole 42 in the rotation direction is the dimension in the circumferential direction described above. The shape of the hole 42 is not limited to the slit shape, and may be a circular shape, an elliptical shape, a polygonal shape, a rectangular shape, or the like.

As shown in FIG. 7, the air flow stop member 6 has an air flow stop portion 60 and a mounting portion 61. The air flow stop portion 60 has a circular shape smaller than the air flow port 27 of the inner panel 23, and a pair of mounting portions 61 are integrally provided on the outer periphery of the air flow stop portion 60.
The air flow stop member 6 is attached to the inner surface panel 23 as follows. As shown in FIG. 5, a pair of mounting portions 61 are fixed by fixing means at locations on the upper surface of the inner surface panel 23 facing the air flow port 27 in the radial direction, and the air flow stop portion 60 is located substantially in the center of the air flow port 27. It is installed so that it is located. Approximately the center means that it may be in the center or may be deviated from the center.

As shown in FIG. 6, the filter motor 5 is attached to the filter side surface 60a opposite to the filter 4 of the air flow stop portion 60 and the filter opposite side surface 60b on the opposite side. The filter motor 5 has a smaller diameter than the air flow stop portion 60.
Therefore, the filter motor 5 does not affect the air flow that has passed through the hole 42 of the filter 4.
The rotary shaft 5a of the filter motor 5 projects from the filter side surface 60a of the air flow stop portion 60 toward the filter 4, the connected member 43 of the filter 4 is connected, and the filter 4 is connected to the rotary shaft 5a. The filter side surface 60a of the air flow stop portion 60 is the filter side surface of the air flow stop member 6, and the filter opposite side surface 60b of the air flow stop portion 60 is the filter opposite side surface of the air flow stop member 6.
Therefore, the rotation shaft 5a of the filter motor 5 rotates at high speed, so that the filter 4 rotates at high speed. The rotation center 4a of the filter 4 is the center of the rotation axis 5a.

As shown in FIG. 6, the filter 4 is located above the bottom plate 71 of the oil pan 7, and the outer periphery 4b is located on the outer peripheral side upward plate 72 side of the opening 70 of the oil pan 7.
Therefore, as the filter 4 rotates at high speed, the collected oil can be dispersed toward the oil pan 7 by centrifugal force, and the oil can be collected by the oil pan 7.

As shown in FIG. 6, the air flow stop member side surface 4c of the filter 4 and the filter side surface 60a of the air flow stop portion 60 face each other with a gap, and the air flow stop portion 60 is a hole 42 on the rotation center side of the filter 4. Facing. The filter side surface 60a of the air flow stop portion 60 is a flat surface parallel to the air flow stop member side surface 4c of the filter 4, but is not limited to this, and is a flat surface not parallel to the air flow stop member side surface 4c of the filter 4. , A surface having a flat surface and a curved surface, a curved surface only, or the like may be used. That is, the air flow stop portion 60 is provided so as to cover the hole 42 on the rotation center side of the filter 4 when viewed from the filter 4.
As shown in FIG. 8, the size of the air flow stop portion 60 is a size facing the hole 42 on the rotation center side of the filter 4, and the hole 42 portion on the rotation center side of the air flow stop member side surface 4c of the filter 4 An air passage 8 is formed between the air flow stop portion 60 and the filter side surface 60a of the air flow stop portion 60.
As shown in FIG. 8, the hole 42 on the rotation center side of the filter 4 is 30% of the length S from the inner circumference 41a of the ventilation portion 41 (outer circumference 40a of the non-ventilation portion 40) to the outer circumference 41b of the ventilation portion 41. These are the holes 42 in the range of 60% or less. That is, if the holes 42 are in the range of 30% or less of the length S, the velocity of the air passing through the holes 42 on the rotation center side of the filter 4 cannot be slowed down so much, and the holes 42 in the range of 60% or more of the length S cannot be slowed down. Then, the ventilation resistance becomes too large and the air volume decreases.

The air that has passed through the hole 42 on the rotation center side of the filter 4 flows through the air passage 8 and is sucked into the fan 3 as shown by the arrow d in FIG. 6, so that the ventilation resistance when flowing through the air passage 8 is the rotation center. It acts as a ventilation resistance of air passing through the hole 42 on the side, and the ventilation resistance of air passing through the hole 42 on the center of rotation increases. That is, the air flow stop portion 60 serves to increase the ventilation resistance of the air passing through the hole 42 on the rotation center side.
Since the air that has passed through the hole 42 on the outer peripheral side of the filter 4 (the hole 42 closer to the outer circumference than the hole 42 on the rotation center side) is directly sucked by the fan 3, the air flow stop portion 60 increases the ventilation resistance. There is no.
Therefore, the velocity of the air passing through the hole 42 on the rotation center side of the filter 4 and the velocity of the air passing through the hole 42 on the outer peripheral side become close to the same, the maximum velocity of the air passing through the hole 42 becomes slow, and the range The noise generated when the hood is operating can be suppressed.

As shown in FIGS. 6 and 7, the outer circumference 4b of the filter 4 has a circular shape centered on the rotation center 4a, and the filter 4 has a circular shape.
The outer circumference 60c of the air flow stop portion 60 is a circle centered on the center of the rotation shaft 5a of the filter motor 5, and the air flow stop portion 60 is a circle centered on the rotation center 4a of the filter 4.
Therefore, it is possible to equalize the ventilation resistance of the air passing through the plurality of holes 42 arranged in the circumferential direction in the holes 42 on the rotation center side of the filter 4.
Further, the side surface 4c of the air flow blocking member of the filter 4 and the filter side surface 60a of the air flow blocking portion 60 are parallel to each other.
Therefore, it is possible to equalize the ventilation resistance of the air passing through the plurality of holes 42 arranged in the inner and outer peripheral directions in the holes 42 on the rotation center side of the filter 4 when passing through the air passage 8.

As shown in FIG. 6, the filter side surface 60a of the air flow stop portion 60 has a convex portion 62 toward the air flow stop member side surface 4c of the filter 4. The convex portion 62 has a ring shape centered on the rotation center 4a of the filter 4.
The gap between the air passages 8 (the distance between the air flow member side surface 4c of the filter 4 and the filter side surface 60a of the air flow stop portion 60) is narrowed by the convex portion 62, and the convex portion 62 and the air flow stop member side surface 4c of the filter 4 are narrowed. Since the ventilation resistance of the air flowing between the air flow stop portion 60 is larger than the ventilation resistance of the air flowing between the filter side surface 60a of the air flow stop portion 60 and the air flow stop member side surface 4c of the filter 4, the filter is larger than the convex portion 62. The ventilation resistance of the air passing through the hole 42 near the center of rotation of No. 4 is larger than the ventilation resistance of the air passing through the hole 42 on the outer peripheral side of the convex portion 62.

The velocity of air passing through the hole 42 closer to the center of rotation of the filter 4 than the convex portion 62 and the velocity of air passing through the hole 42 on the outer peripheral side of the convex portion 62 are close to the same. That is, the peripheral speed of the hole 42 portion closer to the rotation center of the filter 4 than the convex portion 62 of the filter 4 is slower than the peripheral speed of the hole 42 portion on the outer peripheral side of the convex portion 62 of the filter 4, and is lower than the convex portion 62. The velocity of air passing through the hole 42 near the center of rotation of the filter 4 is faster than the velocity of air passing through the hole 42 on the outer peripheral side of the convex portion 62, but both velocities are the same due to the provision of the convex portion 62. Become closer to.
Therefore, the velocity of the air passing through the hole 42 on the rotation center side of the filter 4 and the velocity of the air passing through the hole 42 on the outer peripheral side become closer to the same, and the maximum velocity of the air passing through the hole 42 becomes slower. Therefore, the noise generated when the range hood is operated can be further suppressed.

Since the air flow stop member 6 also serves as the motor mount of the filter motor 5, the motor mount is not required, and the air flow stop member 6 may be mounted, so that the number of members constituting the range hood is reduced and the range hood is reduced. The cost of the microwave oven can be reduced, and the man-hours required to assemble the range hood can also be reduced.
Therefore, it is possible to provide a range hood in which noise generated during operation is suppressed without significantly increasing the price.

The air flow stop member 6 will be specifically described with reference to FIGS. 9 to 12. 9 is a front view of the air flow stop member, FIG. 10 is a bottom view of the air flow stop member, FIG. 11 is a right side view of the air flow stop member shown in FIG. 9, and FIG. 12 is an air shown in FIG. It is a CC cross-sectional view of the flow stop member.
The air flow stop member 6 is integrally continuous with a substantially circular bottom plate 63 having two arcuate side surfaces facing in the radial direction and two portions of the bottom plate 63 facing in the radial direction other than the arcuate side surfaces. It has a pair of rectangular overhanging plates 64, and a pair of rising pieces 65 that are continuous with the arcuate side surface of the bottom plate 63 and the side surfaces of the pair of overhanging plates 64 and are directed upward. The bottom plate 63 and the arcuate portion 65a of the rising piece 65 form an air flow stop portion 60, the lower surface of the bottom plate 63 is the filter side surface 60a, and the upper surface is the filter opposite side surface 60b. The mounting portion 61 is formed by the overhanging plate 64 and the straight portion 65b of the rising piece 65.

A circular opening 66 is formed in the central portion of the bottom plate 63, and the outer periphery of the bottom plate 63 is projected toward the lower surface side in a ring shape to form a convex portion 62.
A mounting hole 67 is formed between the opening 66 and the convex portion 62 of the bottom plate 63. As shown in FIG. 6, the filter motor 5 is placed on the upper surface of the bottom plate 63, the fixing screw 68 is screwed into the filter motor 5 through the mounting hole 67, and the filter motor 5 is attached to the bottom plate 63. The rotating shaft 5a penetrates the opening 66 of the bottom plate 63 and projects from the lower surface of the bottom plate 63.
A mounting piece 69 that is bent downward in an L shape is integrally provided at the end of the overhanging plate 64, and by fixing the mounting piece 69 to the inner surface panel 23, the air flow blocking member 6 is attached to the inner surface panel 23. Attach to.

The corner portion 6a in which the arcuate portion 65a of the bottom plate 63 and the rising piece 65 is continuous and the corner portion 6b in which the straight portion 65b of the overhanging plate 64 and the rising piece 65 are continuous are curved in an arc shape in the vertical direction. ..
Therefore, the air that has passed through the hole 42 of the filter 4 flows smoothly along the curved corner portions 6a and 6b, and the air flow stop member 6 does not disturb the air flow that is sucked by the fan 3.
Since the mounting portion 61 is composed of a wide overhanging plate 64 and a straight portion 65b of the rising piece 65, the mounting portion 61 has high rigidity, and the air flow blocking member 6 can be firmly mounted on the inner surface panel 23. Therefore, the filter motor 5 Can be firmly supported.
Since the overhanging plate 64 is formed with a large opening 61a, the air passing through the hole 42 of the filter 4 may flow through the opening 61a, and the mounting portion 61 may obstruct the flow of air sucked by the fan 3. It is suppressed.

Although not shown, the motor mount may be attached to the inner panel 23 separately from the air flow stop member 6, and the filter motor 5 may be attached to the motor mount.
In this case, since it is not necessary to increase the mounting strength of the air flow blocking member 6, it is not necessary to increase the strength of the mounting portion 61, and a narrow plate or wire can be used as the mounting portion 61. It is also possible to use only the air flow stop portion 60 as the air flow stop member 6 without providing the mounting portion 61, and attach the air flow mounting member 6 to a motor mounting base or the like.

1 ... Range hood, 2 ... Hood, 3 ... Fan, 4 ... Filter, 4a ... Rotation center, 4c ... Air flow stop member side surface, 5 ... Filter motor, 5a ... Rotation shaft, 6 ... Air flow stop member, 7 ... Oil receiver, 8 ... Air passage, 40 ... Non-ventilated part, 41 ... Ventilated part, 42 ... Hole, 60 ... Air flow stop part, 60a ... Filter side surface, 60b ... Filter opposite side surface, 61 ... Mounting part, 62 ... Convex part ..

Claims (7)

A hood, a fan that generates an air flow in the hood, a filter that is rotatably provided upstream of the fan in the air flow flow path and has a hole through which the air passes, and the filter. Equipped with a rotating filter motor
The fan generates an air flow, the filter motor rotates the filter at high speed, and the air is passed through the holes of the filter, so that the oil contained in the air is collected by the filter. It ’s a range hood
An air flow stop member facing the hole on the rotation center side of the filter is provided on the downstream side of the filter in the flow path, and is between the filter side surface of the air flow stop member and the air flow stop member side surface of the filter. The range hood is characterized by having an air passage through which air passes through a hole on the rotation center side of the filter. In the range hood according to claim 1,
The filter has a non-ventilated portion at the center of rotation and a vented portion having holes around the center of rotation.
A range hood in which the hole on the rotation center side of the filter is a hole in the range of 30% or more and 60% or less of the length from the inner circumference to the outer circumference of the ventilation portion. In the range hood according to claim 1 or 2.
A range hood in which the filter is circular and the air flow stop member is circular centered on the center of rotation of the filter. In the range hood according to any one of claims 1, 2 and 3.
A range hood in which the side surface of the air flow stop member of the filter and the side surface of the filter of the air flow stop member are parallel. In the range hood according to any one of claims 1, 2, 3 and 4.
A range hood having a ring-shaped convex portion centered on the rotation center of the filter on the side surface of the filter of the air flow stop member. In the range hood according to any one of claims 1, 2, 3, 4, and 5.
The filter motor is a range hood attached to the air flow stop member. In the range hood according to claim 6,
The filter motor is attached to the side surface of the air flow stop member opposite to the filter, and the filter motor is a range hood having a diameter smaller than that of the air flow stop member.

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