Blowing device

Abstract

The present disclosure provides a blowing device capable of sufficiently exhibiting hair entanglement suppression performance while minimizing a decrease in air volume. The blowing device (1) according to the present disclosure includes: a housing (3) including an intake port and an outlet port; a suction flow passage (25) provided inside the housing (3) and through which air drawn in from the intake port flows; a fan (5) provided inside the housing (3), the fan drawing in air from the intake port and discharging air from the outlet port; a filter disposed at the intake port; and a partition member (9) provided inside the suction flow passage (25) and disposed between the filter and the fan (5). The partition member includes a partition wall portion (43) which makes an opening ratio with respect to an opening area of the suction flow passage (25) 40% or more and 80% or less.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a blowing device.BACKGROUND ART

[0002] The conventional blowing device disclosed in Patent Literature 1 includes a housing having an intake port and an outlet port, and a suction flow passage provided inside the housing, air drawn in from the intake port flowing the suction flow passage. The blowing device also includes a fan that is provided inside the housing, draws in air from the intake port, and discharges air from the outlet port, and a filter that is disposed at the intake port. Further, a second filter as a partition member is provided inside the suction flow passage and arranged between the filter and the fan.

[0003] In the blowing device, the drawing in of air may cause hair to enter from the filter into the inside. The hair that has entered the inside hits the rotating fan and becomes intricately entangled, and may not be able to be pulled out from the filter. In the blowing device disclosed in Patent Literature 1, by arranging the second filter between the filter and the fan, the distance between the second filter and the fan is reduced. Therefore, the space in which hair entering the inside from the filter becomes entangled is reduced, hair entanglement can be suppressed, and the hair can be pulled out from the filter.Citation ListPatent Literature

[0004] Patent Literature 1: Japanese Patent Unexamined Publication No. 2013-123525SUMMARY OF THE INVENTIONTechnical problem

[0005] In the blowing device of Patent Literature 1, a second filter as the partition member has a filter frame and a mesh filter, and integrates the filter frame and the mesh filter. The filter frame is composed of an annular outer peripheral wall and five crosspieces extending radially from the center of the outer peripheral wall, and has only five crosspieces serving as flow path resistance for air flowing through the suction flow passage. The mesh filter has an opening ratio of about 90%, and suppresses the flow path resistance of air. However, in the second filter of Patent Literature 1, in order to maximally suppress the decrease in air volume due to an increase in the flow path resistance, an opening ratio with respect to the opening area of the suction flow passage is high, and there is a possibility that the hair entanglement suppression performance is insufficient.

[0006] The present disclosure has been made in view of such problems in the conventional art. An object of the present disclosure is to provide a blowing device that can sufficiently exhibit hair entanglement suppression performance while minimizing a decrease in air volume.Solution to problem

[0007] The blowing device according to an aspect of the present disclosure includes: a housing including an intake port and an outlet port; a suction flow passage provided inside the housing, air drawn in from the intake port flowing through the suction flow passage; a fan that is provided inside the housing, draws in air from the intake port, and discharges air from the outlet port; a filter that is disposed at the intake port; and a partition member that is provided inside the suction flow passage and is disposed between the filter and the fan. The partition member includes a partition wall portion which makes having an opening ratio 40% or more and 80% or less with respect to an opening area of the suction flow passage.Advantageous effect of invention

[0008] In the present disclosure, it is possible to provide a blowing device that can sufficiently exhibit hair entanglement suppression performance while minimizing a decrease in air volume.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a side view of a blowing device according to a first embodiment. FIG. 2 is a cross-sectional view of the blowing device according to the first embodiment. FIG. 3 is a front view of the blowing device according to the first embodiment with a partition member removed. FIG. 4 is a front view of the blowing device according to the first embodiment with a filter removed. FIG. 5 is a front view of the partition member of the blowing device according to the first embodiment. FIG. 6 is a graph showing a change in a decrease rate of air volume with respect to an opening ratio of a suction flow passage in the blowing device according to the first embodiment. FIG. 7 is a graph showing a change in a twist occurrence rate of hair with respect to the opening ratio of the suction flow passage in the blowing device according to the first embodiment. FIG. 8 is a front view of a blowing device according to a second embodiment with a filter removed. FIG. 9 is a front view of a partition member of the blowing device according to the second embodiment. FIG. 10 is a front view of a blowing device according to a third embodiment with a filter removed. FIG. 11 is a front view of a partition member of the blowing device according to the third embodiment. FIG. 12 is a front view of a blowing device according to a fourth embodiment with a filter removed. FIG. 13 is a front view of a partition member of the blowing device according to the fourth embodiment. FIG. 14 is an enlarged view of a main part of FIG. 12. FIG. 15 is an enlarged cross-sectional view of a main part of the blowing device according to a fifth embodiment. FIG. 16 is a front view of a blowing device according to a sixth embodiment with a filter removed. FIG. 17 is a front view of a partition member of the blowing device according to the sixth embodiment. DESCRIPTION OF EMBODIMENTS

[0010] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessarily detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted.

[0011] The accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.(First Embodiment)

[0012] A first embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is a side view of a blowing device 1 according to the first embodiment. FIG. 2 is a cross-sectional view of the blowing device 1 according to the first embodiment. FIG. 3 is a front view of the blowing device 1 according to the first embodiment with a partition member 9 removed. FIG. 4 is a front view of the blowing device 1 according to the first embodiment with a filter 7 removed. FIG. 5 is a front view of the partition member 9 in the blowing device 1 according to the first embodiment. FIG. 6 is a graph showing a change in a decrease rate of air volume with respect to an opening ratio of a suction flow passage 25 in the blowing device 1 according to the first embodiment. FIG. 7 is a graph showing a change in a twist occurrence rate of hair with respect to the opening ratio of the suction flow passage 25 in the blowing device 1 according to the first embodiment.

[0013] As shown in FIGS. 1 to 5, the blowing device 1 according to the present embodiment is applied to, for example, a hair dryer. The blowing device 1 includes a housing 3, a fan 5, a filter 7, and the partition member 9.

[0014] As shown in FIGS. 1 to 4, the housing 3 includes a grip housing 11, a main body housing 13, and a flow passage housing 15.

[0015] The grip housing 11 is formed in a cylindrical shape, and an outer surface thereof is gripped by a user's hand when the blowing device 1 is used. The grip housing 11 is provided with a switch unit 17 for powering on and off the blowing device 1. The switch unit 17 is electrically connected to an electrical component disposed inside the housing 3, and is electrically connected to a power cord (not illustrated) drawn out from an end portion of the grip housing 11 to an outside. The switch unit 17 has a sliding button disposed on the outer surface of the grip housing 11, and the power supply to the electrical component is turned on and off by operating the button. The switch unit 17 may switch the air volume by operating the button, for example. The grip housing 11 is rotatably connected to the main body housing 13 via a connection portion 19. For example, the grip housing 11 is rotated with respect to the main body housing 13 so that the blowing device 1 has a T-shaped appearance when the blowing device 1 is used. The grip housing 11 is rotated with respect to the main body housing 13 so as to be folded close to the main body housing 13, for example, when the blowing device 1 is stored.

[0016] The main body housing 13 is formed in a cylindrical shape such that the inside of the main body housing 13 has an air flow path through which air flows. The opening on one side in the length direction of the main body housing 13 is an intake port 21 through which air is drawn into the inside thereof. The opening on the other side in the length direction of the main body housing 13 is an outlet port 23 through which internal air is discharged to the outside thereof. Therefore, inside the main body housing 13, air flows such that the intake port 21 is on the upstream side of the air flow and the outlet port 23 is on the downstream side of the air flow. Although not shown, the main body housing 13 is provided with, for example, a switch unit having a push button for switching air temperature, a display unit for displaying the air temperature, and a display lamp for displaying the operation of the blowing device 1. The switch unit and the display unit are electrically connected to a control board provided in the main body housing 13.

[0017] The flow passage housing 15 is formed in a cylindrical shape such that the inside of the flow passage housing 15 has an air flow path through which air flows. A suction flow passage 25 through which air drawn in from the intake port 21 flows is formed close to the intake port 21 of the flow passage housing 15. An opening 27 of the suction flow passage 25 is disposed eccentrically from the center of the intake port 21 such that the opening area of the opening 27 is set smaller than the opening area of the intake port 21, and that the center of the opening 27 is located above the center of the intake port 21. An end portion of the opening 27 of the suction flow passage 25 is formed in a tapered shape expanding radially outward. By forming the end portion of the opening 27 in a tapered shape, air can be introduced into the suction flow passage 25 without reducing the flow rate of the air drawn in from the intake port 21.

[0018] A discharge flow path for guiding the air that has flowed through the suction flow passage 25 to the outlet port 23 is formed close to the outlet port 23 of the flow passage housing 15. The opening area of the discharge flow path is set to be equal to the opening area of the outlet port 23, and the center of the discharge flow path is located at the same position as the center of the outlet port 23. The discharge flow path is provided with a heater 29 that heats the flowing air. The heater 29 is electrically connected to a power supply and a switch unit for switching air temperature, and the operation of the heater 29 is turned on and off by operating a button of the switch unit for switching air temperature. The fan 5 is disposed inside the flow passage housing 15.

[0019] As shown in FIGS. 2 to 4, the fan 5 has a plurality of blade portions 33 formed integrally with a head portion 31 on an outer periphery of the head portion 31, and the head portion 31 and the blade portions 33 are driven to rotate by a motor 35 electrically connected to a power supply. In the fan 5, the head portion 31 and the blade portions 33 are disposed inside the suction flow passage 25 of the flow passage housing 15, and the motor 35 is disposed inside the discharge flow path of the flow passage housing 15. The fan 5 rotates in the rotational direction A in FIG. 4 (i.e., in the direction of the arrow) to draw in air from the intake port 21 and discharge air from the outlet port 23 through the air flow path of the flow passage housing 15. The motor 35 is electrically connected to the switch unit 17. Rotation of the motor 35 is controlled by an operation of the button of the switch unit 17, and air is discharged from the outlet port 23 at an air volume corresponding to the controlled rotation. The filter 7 is provided at the intake port 21 into which air is drawn in by rotation of the fan 5.

[0020] As shown in FIGS. 2 and 3, the filter 7 includes a frame body 37 and a mesh 39. The frame body 37 has an annular outer shape similar to the opening of the intake port 21, and is formed in a mesh shape so as to subdivide the opening region of the intake port 21. The mesh shape of the frame body 37 is preferably a honeycomb shape in order to maintain strength and increase the opening area of the intake port 21 to increase a flow rate of air. The mesh size of the frame body 37 is set based on a size where a test finger (φ25 mm) defined by the Electrical Appliance Control Act cannot be inserted. Therefore, when the blowing device 1 is used, the user's finger does not pass through the frame body 37 and is not inserted into the housing 3. The frame body 37 is fixed to the housing 3 by using two of the plurality of meshes as screw holes and passing screws 41 through the screw holes, and is disposed at the intake port 21. The screw holes are disposed, in the frame body 37, outside the range of the opening 27 of the suction flow passage 25 to prevent a reduction in a flow rate of air to the suction flow passage 25. In addition, it is possible to suppress generation of abnormal noise caused by interference between air having a large flow rate and the screw 41.

[0021] The mesh 39 is formed in a mesh shape of, for example, metal or a flame-retardant resin such as polyester. The opening ratio of the mesh 39 is set to about 55% to 90%. The mesh 39 is insert-molded in the frame body 37 so as to be located inside the frame body 37. The mesh 39 prevents fine dust and hair from entering the housing 3. By insert-molding the mesh 39 into the frame body 37, it is possible to prevent the mesh 39 from being damaged due to rubbing with an opening edge of the intake port 21. The mesh 39 is disposed, in the frame body 37, closer to the outside of the housing 3. By disposing the mesh 39 closer to the outside of the housing 3, dust adhering to the mesh 39 can be easily removed from the outside of the housing 3. Note that, when the mesh 39 is disposed closer to the outside of the housing 3, a pattern of the mesh 39 may be conspicuous. Therefore, it is preferable to provide fine unevenness on the outer surface of the frame body 37.

[0022] Here, when the distance between the filter 7 and the fan 5 is long, hair that has passed through the filter 7 may be disposed between the filter 7 and the fan 5. The hair disposed between the filter 7 and the fan 5 may contact the fan 5 and be converged radially inward, or may be repelled radially outward. When a plurality of hairs are converged radially inward, the plurality of hairs are entangled close to the central axis of the fan 5 while being twisted by rotation of the fan 5. When a plurality of hairs are repelled radially outward, the plurality of hairs are entangled close to the outer peripheral circumference of the fan 5 while being twisted by the repelling of the fan 5. Even if an attempt is made to pull out the entangled hair from the outside of the housing 3, the hair is caught by the filter 7 and cannot be pulled out. Therefore, in order to suppress hair entanglement, the partition member 9 is provided between the filter 7 and the fan 5.

[0023] As shown in FIGS. 2, 4, and 5, the partition member 9 is disposed inside the suction flow passage 25 between the filter 7 and the fan 5. The partition member 9 has an outer shape formed in an annular shape similar to the opening 27 of the suction flow passage 25, and has a partition wall portion 43 that subdivides the opening region of the opening 27 of the suction flow passage 25. The partition wall portion 43 is formed in a lattice shape by integrating a plurality of vertical walls extending in a vertical direction and a plurality of horizontal walls extending in a horizontal direction at intersection portions where the vertical walls and the horizontal walls intersect. A radially outer end portion of the partition wall portion 43 is integrally joined to an inner wall of the suction flow passage 25 by joining means such as adhesion or welding, and the partition member 9 is fixed to the housing 3.

[0024] The partition member 9 is disposed between the filter 7 and the fan 5 to reduce a space in which hair is entangled between the filter 7 and the fan 5. Even when a plurality of hairs that have passed through the partition member 9 come into contact with the fan 5, there is no space in which twisting occurs so that the plurality of hairs are entangled, and thus hair entanglement can be suppressed. Therefore, when hair is pulled out from the outside of the housing 3, the hair can be easily pulled out without being caught by the filter 7.

[0025] Here, if the partition wall portion 43 of the partition member 9 is opened so as to reduce the opening ratio with respect to the opening area of the suction flow passage 25, even when hair comes into contact with the fan 5, twisting caused by movement of the hair is suppressed, and hair entanglement can be suppressed. The opening ratio indicates a ratio of how much a surface perpendicular to the blowing direction is open in the suction flow passage 25. Therefore, the opening ratio can be obtained by dividing the opening area of a surface perpendicular to the blowing direction in a state where the partition wall portion 43 of the partition member 9 is located in the suction flow passage 25 by the opening area of the surface perpendicular to the blowing direction of the suction flow passage 25. On the other hand, if the partition wall portion 43 of the partition member 9 is opened so as to increase the opening ratio with respect to the opening area of the suction flow passage 25, it is possible to suppress a decrease in a flow rate of air flowing through the suction flow passage 25. Therefore, in the partition wall portion 43 of the partition member 9, the opening is set such that the opening ratio with respect to the opening area of the suction flow passage 25 can sufficiently exert the hair entanglement suppression performance while minimizing a decrease in air volume.

[0026] The range of the opening ratio with respect to the opening area of the suction flow passage 25 can be derived from a relationship between the opening ratio of the suction flow passage 25 and the decrease rate of the air volume and a relationship between the opening ratio of the suction flow passage 25 and the twist occurrence rate of hair. In general, it is known that, when an opening ratio decreases such as in a case where flow path resistance such as the filter 7 is disposed with respect to the opening area of the intake port 21, the decrease rate of the air volume increases quadratically. Therefore, as illustrated in FIG. 6, according to an approximate curve in the relationship between the opening ratio of the opening 27 of the suction flow passage 25 and the decrease rate of the air volume, when an upper limit of the decrease rate of the air volume is set to 10%, a lower limit of the opening ratio of the opening 27 of the suction flow passage 25 is about 40%. On the other hand, as illustrated in FIG. 7, in the relationship between the opening ratio of the opening 27 of the suction flow passage 25 and the twist occurrence rate of hair, it can be seen that the twist occurrence rate of hair increases when the opening ratio of the opening 27 of the suction flow passage 25 is 80% or larger. Therefore, an upper limit is 80%, which is the opening ratio of the opening 27 of the suction flow passage 25 when the twist occurrence rate of hair is 0%.

[0027] As described above, the opening is set such that the partition wall portion 43 of the partition member 9 makes the opening ratio with respect to the opening area of the suction flow passage 25 40% or more and 80% or less. Therefore, it is possible to suppress the flow path resistance caused by the partition member 9, suppress a decrease in the flow rate of air flowing through the suction flow passage 25, and minimize a decrease in air volume. In addition, due to the partition member 9, even when hair comes into contact with the fan 5, twisting does not occur in the hair, and the hair entanglement suppression performance can be sufficiently exhibited. By suppressing hair entanglement, it is not necessary for the user to cut hair entangled in the filter 7, and the risk to the user can be reduced.

[0028] Such a blowing device 1 includes the housing 3 including the intake port 21 and the outlet port 23, and the suction flow passage 25 which is provided inside the housing 3 and through which air drawn in from the intake port 21 flows. The blowing device 1 also includes the fan 5 that is provided inside the housing 3, draws in air from the intake port 21, and discharges air from the outlet port 23, and the filter 7 that is disposed at the intake port 21. Further, the partition member 9 is provided inside the suction flow passage 25 and disposed between the filter 7 and the fan 5. The partition member 9 includes the partition wall portion 43 which makes the opening ratio with respect to the opening area of the suction flow passage 25 40% or more and 80% or less.

[0029] Therefore, it is possible to suppress the flow path resistance caused by the partition member 9, suppress a decrease in the flow rate of air flowing through the suction flow passage 25, and minimize a decrease in air volume. In addition, due to the partition member 9, even when hair comes into contact with the fan 5, twisting does not occur in the hair, and the hair entanglement suppression performance can be sufficiently exhibited.

[0030] Therefore, in such a blowing device 1, it is possible to sufficiently exhibit hair entanglement suppression performance while minimizing a decrease in air volume.(Second Embodiment)

[0031] A second embodiment will be described with reference to FIGS. 8 and 9. FIG. 8 is a front view of a blowing device 101 according to the second embodiment with a filter removed. FIG. 9 is a front view of the partition member 9 in the blowing device 101 according to the second embodiment.

[0032] In the blowing device 101 according to the present embodiment, the partition wall portion 43 includes: one or more annular walls 103 disposed between the central axis of the fan 5 and the inner wall of the suction flow passage 25 in a radial direction and formed in an annular shape; and a connecting wall 105 connecting the annular wall 103 and the inner wall of the suction flow passage 25.

[0033] The same configurations as those in the first embodiment are denoted by the same reference numerals, and description of the configurations and functions will be omitted by referring to the first embodiment. However, since the components are the same as those in the first embodiment, the obtained effects are the same.

[0034] As shown in FIGS. 8 and 9, the partition wall portion 43 of the partition member 9 includes the annular wall 103 and the connecting wall 105.

[0035] The annular wall 103 is formed in a circular annular shape so that the center thereof is disposed at the same position as the central axis of the fan 5. A plurality of annular walls 103 are provided so that one or more annular walls 103 are disposed between the central axis of the fan 5 and the inner wall of the suction flow passage 25 in a radial direction, and the diameter increases from the central axis of the fan 5 toward the radially outer side of the fan 5. Here, three annular walls 103 are provided. When hair that has passed through the partition member 9 comes into contact with the fan 5, the annular wall 103 restricts movement of the hair in the suction flow passage 25 in the radial direction and suppresses entanglement caused by twisting of a plurality of hairs.

[0036] The connecting wall 105 is formed integrally with the annular wall 103, and is integrally joined to the inner wall of the suction flow passage 25 by joining means such as adhesion or welding, thereby connecting the annular wall 103 and the inner wall of the suction flow passage 25. A plurality of connecting walls 105 are provided in the circumferential direction and the radial direction of the suction flow passage 25. Here, four connecting walls 105 are provided between the annular walls 103 and 103 adjacent in the radial direction at the radially innermost side. Eight connecting walls 105 are provided between the four connecting walls 105 and the annular walls 103 and 103 adjacent thereto in the radial direction. Eight connecting walls 105 are provided between one annular wall 103 and the inner wall of the suction flow passage 25, the one annular wall 103 being included in the annular walls 103, the one annular wall 103 being located on the outermost side in the radial direction, the one annular wall 103 being adjacent to the inner wall of the suction flow passage 25. Each of the connecting walls 105 has a first connecting point 107 and a second connecting point 109. One end and the other end of each of the connecting walls 105 are respectively connected to the inner wall of the suction flow passage 25 and one annular wall 103 located on the radially outer side, or to the one annular wall 103 located on the radially outer side and one annular wall 103 located on the radially inner side. The one end of each of the connecting walls 105 is the first connecting point 107, and the other end of each of the connecting walls 105 is the second connecting point 109. The plurality of connecting walls 105 are extended radially outward from the central axis of the fan 5 so that the first connecting point 107 and the second connecting point 109 are located on a straight line passing through the central axis of the fan 5. When hair that has passed through the partition member 9 comes into contact with the fan 5, the connecting wall 105 restricts movement of the hair in the suction flow passage 25 in the circumferential direction and suppresses entanglement caused by twisting of a plurality of hairs.

[0037] In such a blowing device 101, the partition wall portion 43 includes: one or more annular walls 103 disposed between the central axis of the fan 5 and the inner wall of the suction flow passage 25 in a radial direction and formed in an annular shape; and the connecting wall 105 connecting the annular wall 103 and the inner wall of the suction flow passage 25.

[0038] When hair that has passed through the partition member 9 comes into contact with the fan 5, the annular wall 103 restricts movement of the hair in the suction flow passage 25 in the radial direction and suppresses entanglement caused by twisting of a plurality of hairs. When hair that has passed through the partition member 9 comes into contact with the fan 5, the connecting wall 105 restricts movement of the hair in the suction flow passage 25 in the circumferential direction and suppresses entanglement caused by twisting of a plurality of hairs. Therefore, the partition wall portion 43 including the annular wall 103 and the connecting wall 105 can more effectively suppress hair entanglement.(Third Embodiment)

[0039] A third embodiment will be described with reference to FIGS. 10 and 11. FIG. 10 is a front view of a blowing device 201 according to the third embodiment with a filter removed. FIG. 11 is a front view of the partition member 9 in the blowing device 201 according to the third embodiment.

[0040] In the blowing device 201 according to the present embodiment, the partition wall portion 43 increases the opening ratio, with respect to the opening area of the suction flow passage 25, radially outward from the central axis of the fan 5.

[0041] A plurality of connecting walls 105 are provided in the circumferential direction and the radial direction of the suction flow passage 25. Among the plurality of connecting walls 105, a plurality of connecting walls 105 located on the radially outer side are set to have a wider interval in the circumferential direction than the plurality of connecting walls 105 located on the radially inner side.

[0042] Further, a radial interval between an outermost annular wall 103 and an annular wall 103 adjacent thereto on the radial inner side is set to be larger than a radial interval between an innermost annular wall 103 and an annular wall 103 adjacent thereto on the radial outer side, the fan 5 having a center axis penetrating the innermost annular wall 103.

[0043] The same reference numerals are given to the same configurations as those of the other embodiments, and description of the configurations and functions will be omitted by referring to the other embodiments. However, since the configurations are the same as those of the other embodiments, the obtained effects are the same.

[0044] Here, in general, in the intake port 21, hair is more easily drawn in on the central axis side of the fan 5 than on the outer diameter side of the fan 5. On the other hand, in the vicinity of the fan 5, a flow rate of air flowing on the outer diameter side of the fan 5 is larger than that close to the central axis of the fan 5.

[0045] Therefore, as shown in FIGS. 10 and 11, the partition wall portion 43 of the partition member 9 is provided so that the opening ratio with respect to the opening area of the suction flow passage 25 increases radially outward from the central axis of the fan 5. Here, eight of the connecting walls 105 are provided between the annular walls 103 and 103 adjacent in the radial direction, and between the annular wall 103 and the inner wall of the suction flow passage 25. The plurality of connecting walls 105 located on the radially outer side are set to have a wider interval in the circumferential direction than the plurality of connecting walls 105 located on the radially inner side. Therefore, in the suction flow passage 25, an opening area is larger on the radially outer side than on the radially inner side. On the radially inner side of the suction flow passage 25, since an opening area of the partition member 9 is small, hair is less likely to be drawn in by the partition member 9, and hair entanglement can be suppressed. On the radially inner side of the suction flow passage 25, an opening area of the partition member 9 is large, and thus flow path resistance caused by the partition member 9 is reduced, and a decrease in air volume due to the partition member 9 can be suppressed. In addition, the opening ratio of the suction flow passage 25 can be easily adjusted by adjusting an interval of the connecting wall 105 in the circumferential direction.

[0046] A plurality of annular walls 103 of the partition wall portion 43 are provided between the central axis of the fan 5 and the inner wall of the suction flow passage 25 in a radial direction so as to increase in diameter from the central axis of the fan 5 toward the radially outer side. Here, three annular walls 103 are provided. Here, the annular wall 103 located at the radially innermost side (at the central axis of the fan 5) is formed in a disk shape and is not opened. Hereinafter, for convenience of description, the annular wall 103 located at the radially innermost side is referred to as a first member, and the annular wall 103 located on the radially outer side of the first member is referred to as a second member. In addition, the annular wall 103 located on the radially outer side of the second member is referred to as a third member, and the inner wall of the suction flow passage located on the radially outer side of the third member is referred to as a fourth member.

[0047] A radial interval between the first member and the second member is set to be narrower than a radial interval between the second member and the third member. A radial interval between the second member and the third member is set to be narrower than a radial interval between the third member and the fourth member. When the radial intervals are set in this manner, in the suction flow passage 25, an opening area is larger on the radially outer side than on the radially inner side. Therefore, on the radially inner side of the suction flow passage 25, since an opening area of the partition member 9 is small, hair is less likely to be drawn in by the partition member 9, and hair entanglement can be suppressed. On the radially outer side of the suction flow passage 25, an opening area of the partition member 9 is large. Therefore, flow path resistance caused by the partition member 9 is reduced, and a decrease in air volume due to the partition member 9 can be suppressed. In addition, the opening ratio of the suction flow passage 25 can be easily adjusted by adjusting a radial interval of the annular wall 103. In a case where the annular wall 103 located at the radially innermost side is opened (formed in an annular shape), a radial interval between the annular wall 103 and the central axis of the fan 5 may be set to be the narrowest.

[0048] In such a blowing device 201, the partition wall portion 43 increases the opening ratio, with respect to the opening area of the suction flow passage 25, radially outward from the central axis of the fan 5.

[0049] Therefore, on the radially inner side of the suction flow passage 25, since an opening area of the partition member 9 is small, hair is less likely to be drawn in by the partition member 9, and hair entanglement can be suppressed. On the radially outer side of the suction flow passage 25, an opening area of the partition member 9 is large. Therefore, flow path resistance caused by the partition member 9 is reduced, and a decrease in air volume due to the partition member 9 can be suppressed.

[0050] In addition, a plurality of connecting walls 105 are provided in the circumferential direction and the radial direction of the suction flow passage 25. Among the plurality of connecting walls 105, the plurality of connecting walls 105 located on the radially outer side are set to have a wider interval in the circumferential direction than the plurality of connecting walls 105 located on the radially inner side.

[0051] Therefore, by adjusting the interval of the connecting walls 105 in the circumferential direction, the opening ratio of the suction flow passage 25 can be easily adjusted.

[0052] Further, the radial interval between the outermost annular wall 103 and the annular wall 103 adjacent thereto on the radial inner side is set to be larger than the radial interval between the innermost annular wall 103 and the annular wall 103 adjacent thereto on the radial outer side, the fan 5 having a center axis penetrating the innermost annular wall 103.

[0053] Therefore, by adjusting the radial interval of the annular wall 103, the opening ratio of the suction flow passage 25 can be easily adjusted.(Fourth Embodiment)

[0054] A fourth embodiment will be described with reference to FIGS. 12 to 14. FIG. 12 is a front view of a blowing device 301 according to the fourth embodiment with a filter removed. FIG. 13 is a front view of the partition member 9 in the blowing device 301 according to the fourth embodiment. FIG. 14 is an enlarged view of a main part of FIG. 12.

[0055] In the blowing device 301 according to the present embodiment, each of the connecting walls 105 has the first connecting point 107 and the second connecting point 109. One end and the other end of each of the connecting walls 105 are respectively connected to the inner wall of the suction flow passage 25 and one annular wall 103 located on the radially outer side, or to the one annular wall 103 located on the radially outer side and one annular wall 103 located on the radially inner side. The one end of each of the connecting walls 105 is the first connecting point 107, and the other end of each of the connecting walls 105 is the second connecting point 109. The first connecting point 107 is disposed on an opposite side of the rotational direction A of the fan 5 with respect to the straight line L passing through the central axis of the fan 5 and the second connecting point 109.

[0056] The same reference numerals are given to the same configurations as those of the other embodiments, and description of the configurations and functions will be omitted by referring to the other embodiments. However, since the configurations are the same as those of the other embodiments, the obtained effects are the same.

[0057] Here, hair that has entered the suction flow passage 25 may pass over the blade portion 33 of the fan 5 and enter a deep part of the suction flow passage 25. If the hair that has passed over the blade portion 33 of the fan 5 is left as it is, the hair may become entangled in the blade portion 33 of the fan 5, making it difficult to pull out the hair. Therefore, hair that has passed over the blade portion 33 of the fan 5 needs to be cut by the blade portion 33 by rotation of the fan 5.

[0058] As shown in FIGS. 12 to 14, in the partition member 9, the first connecting point 107 of the connecting wall 105, which faces the blade portion 33 of the fan 5 in the blowing direction, is disposed on the opposite side of the rotational direction of the fan 5 with respect to the straight line L passing through the central axis of the fan 5 and the second connecting point 109. When the first connecting point 107 is disposed on the opposite side of the rotational direction of the fan 5, the radially outer side of the connecting wall 105 is inclined so as to face the rotational direction A of the fan 5. Hair abutted against the inclined connecting wall 105 is converged to the second connecting point 109 along the inclination of the connecting wall 105 by rotation of the fan 5. Here, cutting of the hair by the blade portion 33 of the fan 5 is easier to perform because rotational force is transmitted to the inner diameter side of the blade portion 33 more than to the outer diameter side of the blade portion 33. Therefore, hair converged to the second connecting point 109 can be easily cut by the blade portion 33 by rotation of the fan 5. The shape of the connecting wall 105 is set to have a curvature in a direction opposite to the rotational direction of the fan 5. The connecting wall 105 is formed to have a curvature so as to have a symmetrical shape with the shape of a side surface of the blade portion 33 in the rotational direction. When the connecting wall 105 has a symmetrical shape with the side surface of the blade portion 33 in the rotational direction, hair can be cut more easily by the blade portion 33.

[0059] In such a blowing device 301, each of the connecting walls 105 has the first connecting point 107 and the second connecting point 109. One end and the other end of each of the connecting walls 105 are respectively connected to the inner wall of the suction flow passage 25 and one annular wall 103 located on the radially outer side, or to the one annular wall 103 located on the radially outer side and one annular wall 103 located on the radially inner side. The one end of each of the connecting walls 105 is the first connecting point 107, and the other end of each of the connecting walls 105 is the second connecting point 109. The first connecting point 107 is disposed on the opposite side of the rotational direction A of the fan 5 with respect to the straight line L passing through the central axis of the fan 5 and the second connecting point 109.

[0060] When the first connecting point 107 is disposed on the opposite side of the rotational direction A of the fan 5, the radially outer side of the connecting wall 105 is inclined so as to face the rotational direction A of the fan 5. Hair that has entered a deep part of the suction flow passage 25 beyond the fan 5 is converged by rotation of the fan 5 along the inclination of the connecting wall 105 to the second connecting point 109 which is on the radially inner side where rotational force of the fan 5 is large. Therefore, the hair converged at the second connecting point 109 can be easily cut by rotation of the fan 5.(Fifth Embodiment)

[0061] A fifth embodiment will be described with reference to FIG. 15. FIG. 15 is an enlarged cross-sectional view of a main part of a blowing device 401 according to the fifth embodiment.

[0062] In the blowing device 401 according to the present embodiment, the partition member 9 is provided with an extending portion 403 extending from the vicinity of the second connecting point 109 toward the fan 5.

[0063] The same reference numerals are given to the same configurations as those of the other embodiments, and description of the configurations and functions will be omitted by referring to the other embodiments. However, since the configurations are the same as those of the other embodiments, the obtained effects are the same.

[0064] As shown in FIG. 15, the partition member 9 is provided with the extending portion 403 extending toward the fan 5 from a surface facing the fan 5 located in the vicinity of the second connecting point 109 (see FIG. 15). A plurality of extending portions 403 are provided corresponding to the plurality of second connecting points 109. The extending portion 403 is disposed so as to sandwich hair converged at the second connecting point 109 with the side surface in the rotational direction of the blade portion 33 of the fan 5. The extending portion 403 serves as a fulcrum for holding the hair when the hair is cut by the blade portion 33 of the fan 5. Therefore, when the extending portion 403 is provided, the fulcrum when cutting the hair becomes close to the fan 5, and the hair can be cut more easily by rotation of the fan 5.

[0065] In such a blowing device 401, the partition member 9 is provided with the extending portion 403 extending from the vicinity of the second connecting point 109 toward the fan 5.

[0066] Therefore, the fulcrum when cutting hair is close to the fan 5 by using the extending portion 403, and the hair can be cut more easily by rotation of the fan 5.(Sixth Embodiment)

[0067] A sixth embodiment will be described with reference to FIGS. 16 and 17. FIG. 16 is a front view of a blowing device 501 according to the sixth embodiment with a filter removed. FIG. 17 is a front view of the partition member 9 in a blowing device 501 according to the sixth embodiment.

[0068] In the blowing device 501 according to the present embodiment, a plurality of connecting walls 105 are provided in the circumferential direction and the radial direction of the suction flow passage 25. In addition, each of the connecting walls 105 has a first connecting point 107 and a second connecting point 109. One end and the other end of each of the connecting walls 105 are respectively connected to the inner wall of the suction flow passage 25 and one annular wall 103 located on the radially outer side, or to the one annular wall 103 located on the radially outer side and one annular wall 103 located on the radially inner side. The one end of each of the connecting walls 105 is the first connecting point 107, and the other end of each of the connecting walls 105 is the second connecting point 109. The first connecting point 107 and the second connecting point 109 are disposed at different positions in the circumferential direction of the annular wall 103.

[0069] The same reference numerals are given to the same configurations as those of the other embodiments, and description of the configurations and functions will be omitted by referring to the other embodiments. However, since the configurations are the same as those of the other embodiments, the obtained effects are the same.

[0070] As shown in FIGS. 16 and 17, the first connecting point 107 and the second connecting point 109 of the connecting wall 105 are disposed at different positions in the circumferential direction of the annular wall 103. The position in the circumferential direction of the first connecting point 107 in the annular wall 103 is disposed to be substantially at a midpoint between the second connecting points 109 and 109 adjacent in the circumferential direction. Similarly, the position in the circumferential direction of the second connecting point 109 in the annular wall 103 is disposed to be substantially at a midpoint between the first connecting points 107 and 107 adjacent in the circumferential direction. When the first connecting point 107 and the second connecting point 109 are disposed at different positions with respect to the circumferential direction of the annular wall 103, connecting walls 105 and 105 adjacent in the radial direction are not continuous in the radial direction. Therefore, when an impact is applied from the outside, such as when the blowing device 501 is dropped, the impact is dispersed by the annular wall 103, and impact resistance can be improved. In addition, when the first connecting point 107 and the second connecting point 109 are disposed substantially at midpoints between the second connecting points 109 and 109 adjacent in the circumferential direction and between the first connecting points 107 and 107 adjacent in the circumferential direction, it is possible to equally set a dispersion point for an impact in the annular wall 103.

[0071] In such a blowing device 501, a plurality of connecting walls 105 are provided in the circumferential direction and the radial direction of the suction flow passage 25. In addition, each of the connecting walls 105 has the first connecting point 107 and the second connecting point 109. One end and the other end of each of the connecting walls 105 are respectively connected to the inner wall of the suction flow passage 25 and one annular wall 103 located on the radially outer side, or to the one annular wall 103 located on the radially outer side and one annular wall 103 located on the radially inner side. The one end of each of the connecting walls 105 is the first connecting point 107, and the other end of each of the connecting walls 105 is the second connecting point 109. The first connecting point 107 and the second connecting point 109 are disposed at different positions in the circumferential direction of the annular wall 103.

[0072] By disposing the first connecting point 107 and the second connecting point 109 at different positions with respect to the circumferential direction of the annular wall 103, connecting walls 105 and 105 adjacent in the radial direction are not continuous in the radial direction. Therefore, when an impact is applied to the blowing device 501 from the outside, the impact is dispersed by the annular wall 103, and impact resistance can be improved.(Other Embodiments)

[0073] An end surface close to the fan located in the vicinity of the first connecting point of the partition member and the second connecting point of the partition member may be raised toward the fan more than another end surface close to the fan of the partition member. The end surface raised toward the fan serves as a fulcrum for pressing hair when hair is cut by the fan. Therefore, by raising the end surface located in the vicinity of the first connecting point of the partition member and the second connecting point of the partition member toward the fan, the fulcrum when cutting hair is close to the fan, and hair can be cut more easily by rotation of the fan.

[0074] The connecting wall may be able to cut hair brought together along the connecting wall. A side surface of the connecting wall facing the rotational direction of the fan may, for example, be formed sharply so that hair brought together along the connecting wall can be cut by rotation of the fan. This makes it easier to cut hair.

[0075] The annular wall may be disposed so that a radial interval between the annular wall that includes the central axis of the fan and a member adjacent to the annular wall in the radial direction is variable. The annular wall and the connecting wall may be made of, for example, a stretchable elastic material. When the annular wall is disposed on the radially outer side, the annular wall stretches to have a large diameter, a width of the annular wall narrows, and the radial interval between the annular wall and the member adjacent thereto in the radial direction widens. At this time, the connecting wall stretches and its width narrows, and an interval between connecting walls adjacent in the circumferential direction widens. Therefore, when the annular wall is disposed on the radially outer side, an opening area of the suction flow passage increases. On the other hand, when the annular wall is disposed on the radially inner side, the annular wall contracts to have a small diameter, the width of the annular wall widens, and the radial interval between the annular wall and the member adjacent thereto in the radial direction narrows. At this time, the connecting wall contracts and its width widens, and an interval between connecting walls adjacent in the circumferential direction narrows. Therefore, when the annular wall is disposed on the radially inner side, the opening area of the suction flow passage decreases. The blowing device may include a variation control unit that controls the radial interval between the annular wall and the member adjacent to the annular wall in the radial direction. With this configuration, the opening area of the suction flow passage can be varied by varying the radial interval between the annular wall and the member adjacent to the annular wall in the radial direction by the variation control unit.

[0076] The blowing device may include a hair type detection unit that detects hair type of hair. With this configuration, hair type of hair drawn into the suction flow passage can be detected.

[0077] The hair type detection unit may be electrically connected to the variation control unit. The variation control unit determines whether or not hair is likely to be entangled in the suction flow passage based on hair type data detected by the hair type detection unit, and controls the radial interval between the annular wall and the member adjacent in the radial direction. With this configuration, the variation control unit can vary the opening area of the suction flow passage based on hair type.

[0078] The variation control unit may have a learning function. The variation control unit includes a storage unit that records, for example, hair type when hair is entangled, the number of hairs, and a rotation speed of the fan, and compares the recorded data with past data. Therefore, the variation control unit can predict a condition under which hair is likely to be entangled, and can further suppress hair entanglement.

[0079] The variation control unit may be capable of transmitting and receiving data to and from the outside. With this configuration, by transmitting data to the outside, the data of the blowing device can be reflected in another device, and by receiving data from the outside, new data can be reflected in the blowing device.(Note)

[0080] The following techniques are disclosed by the above description of the embodiments.

[0081] (Technique 1) A blowing device comprising: a housing having an intake port and an outlet port; a suction flow passage provided inside the housing, air drawn in from the intake port flowing through the suction flow passage; a fan provided inside the housing, the fan drawing in air from the intake port and discharging air from the outlet port; a filter disposed at the intake port; and a partition member provided inside the suction flow passage and disposed between the filter and the fan, wherein the partition member includes a partition wall portion which makes an opening ratio with respect to an opening area of the suction flow passage 40% or more and 80% or less.

[0082] With this configuration, it is possible to suppress flow path resistance caused by the partition member, suppress a decrease in a flow rate of air flowing through the suction flow passage, and minimize a decrease in air volume. In addition, due to the partition member, even when hair comes into contact with the fan, twisting does not occur in the hair, and the hair entanglement suppression performance can be sufficiently exhibited. Therefore, in such a blowing device, it is possible to sufficiently exhibit hair entanglement suppression performance while minimizing a decrease in air volume.

[0083] (Technique 2) The blowing device according to Technique 1, wherein the partition wall portion increases the opening ratio with respect to the opening area of the suction flow passage radially outward from a central axis of the fan.

[0084] With this configuration, on the radially inner side of the suction flow passage, since an opening area of the partition member is small, hair is less likely to be drawn in by the partition member, and thus hair entanglement can be suppressed. On the radially outer side of the suction flow passage, an opening area of the partition member is large. Therefore, flow path resistance caused by the partition member is reduced, and a decrease in air volume due to the partition member can be suppressed.

[0085] (Technique 3) The blowing device according to Technique 1 or 2, wherein the partition wall portion includes: one or more annular walls disposed between a central axis of the fan and an inner wall of the suction flow passage in a radial direction and formed in an annular shape; and a connecting wall connecting the one or more annular walls and the inner wall of the suction flow passage.

[0086] With this configuration, when hair that has passed through the partition member comes into contact with the fan, the annular wall restricts movement of the hair in the suction flow passage in the radial direction and suppresses entanglement caused by twisting of a plurality of hairs. When hair that has passed through the partition member comes into contact with the fan, the connecting wall restricts movement of the hair in the suction flow passage in the circumferential direction and suppresses entanglement caused by the twisting of the plurality of hairs. Therefore, the partition wall portion including the annular wall and the connecting wall can more effectively suppress hair entanglement.

[0087] (Technique 4) The blowing device according to Technique 3, wherein the connecting wall includes a plurality of connecting walls provided in the circumferential direction and the radial direction of the suction flow passage, and among the plurality of connecting walls, a plurality of connecting walls located on the radially outer side are set to have a wider interval in the circumferential direction than a plurality of connecting walls located on the radially inner side.

[0088] With this configuration, the opening ratio of the suction flow passage can be easily adjusted by adjusting the interval of the connecting walls in the circumferential direction.

[0089] (Technique 5) The blowing device according to Technique 3 or Technique 4, wherein a radial interval between an outermost annular wall and an annular wall adjacent thereto on the radial inner side is set to be larger than a radial interval between an innermost annular wall and an annular wall adjacent thereto on the radial outer side, the fan having a center axis penetrating the innermost annular wall.

[0090] With this configuration, the opening ratio of the suction flow passage can be easily adjusted by adjusting the radial interval of the annular wall.

[0091] (Technique 6) The blowing device according to any one of Techniques 3 to 5, wherein each of the connecting walls has a first connecting point and a second connecting point. One end and the other end of each of the connecting walls are respectively connected to the inner wall of the suction flow passage and one annular wall located on the radially outer side, or to the one annular wall located on the radially outer side and one annular wall located on the radially inner side. The one end of each of the connecting walls is the first connecting point, and the other end of each of the connecting walls is the second connecting point. The first connecting point is disposed on the opposite side of the rotational direction of the fan with respect to the straight line passing through the central axis of the fan and the second connecting point.

[0092] With this configuration, Since the first connecting point is disposed on the opposite side of the rotational direction of the fan, the radially outer side of the connecting wall is inclined so as to face the rotational direction of the fan. Hair that has entered a deep part of the suction flow passage beyond the fan is converged by rotation of the fan along the inclination of the connecting wall to the second connecting point which is on the radially inner side where rotational force of the fan is large. Therefore, the hair converged at the second connecting point can be easily cut by rotation of the fan.

[0093] (Technique 7) The blowing device according to Technique 6, wherein the partition member is provided with an extending portion extending from the vicinity of the second connecting point toward the fan.

[0094] With this configuration, the fulcrum when cutting hair is located close to the fan by using the extending portion, and hair can be cut more easily by rotation of the fan.

[0095] (Technique 8) The blowing device according to any one of Techniques 3 to 7, wherein: the blowing device includes a plurality of connecting walls provided in the circumferential direction and the radial direction of the suction flow passage, the connecting wall is included in the plurality of connecting walls; each of the connecting walls has a first connecting point and a second connecting point; one end and the other end of each of the connecting walls are respectively connected to the inner wall of the suction flow passage and one annular wall located on the radially outer side, or to the one annular wall located on the radially outer side and one annular wall located on the radially inner side; the one end of each of the connecting walls is the first connecting point, and the other end of each of the connecting walls is the second connecting point; and the first connecting point and the second connecting point are disposed at different positions with respect to the circumferential direction of the annular wall.

[0096] With this configuration, when the first connecting point and the second connecting point are disposed at different positions with respect to the circumferential direction of the annular wall, connecting walls adjacent in the radial direction are not continuous in the radial direction. Therefore, when an impact is applied to the blowing device from the outside, the impact is dispersed by the annular wall, and impact resistance can be improved.

[0097] (Technique 9) The blowing device according to Technique 6, wherein the connecting wall has a curvature in a direction opposite to the rotational direction of the fan.

[0098] With this configuration, it is possible to make it easier to cut hair by using the fan.

[0099] (Technique 10) The blowing device according to any one of Techniques 3 to 9, wherein each of the connecting walls has a first connecting point and a second connecting point. One end and the other end of each of the connecting walls are respectively connected to the inner wall of the suction flow passage and one annular wall located on the radially outer side, or to the one annular wall located on the radially outer side and one annular wall located on the radially inner side. The one end of each of the connecting walls is the first connecting point, and the other end of each of the connecting walls is the second connecting point.

[0100] With this configuration, the end surface raised toward the fan serves as a fulcrum for pressing hair when cutting hair by using the fan. Therefore, when the end surface located in the vicinity of the first connecting point and the second connecting point is raised toward the fan, the fulcrum when cutting hair is close to the fan, and hair can be cut more easily by rotation of the fan.

[0101] (Technique 11) The blowing device according to any one of Techniques 3 to 10, wherein the connecting wall is capable of cutting hair brought together along the connecting wall.

[0102] With this configuration, hair can be cut by the connecting wall, and hair can be cut more easily.

[0103] (Technique 12) The blowing device according to any one of Techniques 3 to 11, wherein the annular wall is disposed so as to allow to vary the radial interval between the annular wall that includes the central axis of the fan and a member adjacent to the annular wall in the radial direction, and the blowing device includes a variation control unit configured to control the radial interval between the annular wall and the member adjacent to the annular wall in the radial direction.

[0104] With this configuration, it is possible to vary the opening area of the suction flow passage by varying the radial interval between the annular wall and the member adjacent thereto in the radial direction by using the variation control unit.

[0105] (Technique 13) The blowing device according to any one of Techniques 1 to 12, further comprising a hair type detection unit that detects hair type of hair.

[0106] With this configuration, it is possible to detect hair type of hair drawn in.

[0107] (Technique 14) The blowing device according to Technique 12, further comprising a hair type detection unit that detects hair type of hair, wherein the hair type detection unit is electrically connected to the variation control unit, and the variation control unit determines whether or not hair is likely to be entangled in the suction flow passage based on hair type data detected by the hair type detection unit, and controls the radial interval between the annular wall and a member adjacent to the annular wall in the radial direction.

[0108] With this configuration, the variation control unit can vary the opening area of the suction flow passage based on hair type.

[0109] (Technique 15) The blowing device according to Technique 12, wherein the variation control unit has a learning function.

[0110] With this configuration, it is possible to predict a condition under which hair is likely to become entangled by the variation control unit, and it is possible to further suppress hair entanglement.

[0111] (Technique 16) The blowing device according to Technique 12, wherein the variation control unit is capable of transmitting and receiving data to and from the outside.

[0112] With this configuration, it is possible to reflect data of the blowing device in another device by transmitting data to the outside, and to reflect new data in the blowing device by receiving data from the outside.

[0113] It should be noted that the above-described embodiments are intended to exemplify the technique according to the present disclosure, and therefore, various modifications, replacements, additions, and omissions can be made within the scope of the claims or equivalents thereof.

[0114] For example, the center of the annular wall is disposed at the same position as the central axis of the fan, but the present invention is not limited thereto, and the center of the annular wall may be disposed at a position eccentric from the central axis of the fan.

[0115] In addition, although the connecting wall inclined to face the rotational direction of the fan is inclined so as to have a curvature, the present invention is not limited thereto, and the connecting wall may be inclined so as to connect the first connecting point and the second connecting point in a straight line.

[0116] Further, the connecting wall in which the positions of the first connecting point and the second connecting point with respect to the circumferential direction of the annular wall are different is inclined to face the rotational direction of the fan, but the present invention is not limited thereto. For example, similarly to the connecting wall of the third and fourth embodiments, even in the case of a connecting wall radially extending from the central axis of the fan, the first connecting point and the second connecting point of the connecting wall adjacent in the radial direction may be different from each other in the circumferential direction of the annular wall.

[0117] The shape of the partition wall portion is not limited to that described above, and may be any shape, for example, a honeycomb shape.INDUSTRIAL APPLICABILITY

[0118] The present disclosure is applicable to devices in which drawing in air creates a risk of hair entanglement. Specifically, the present disclosure is applicable to a hair dryer, an electric fan, and a vacuum cleaner.REFERENCE MARKS IN THE DRAWINGS

[0119] 1blowing device 3housing 5fan 7filter 9partition member 21intake port 23outlet port 25suction flow passage 43partition wall portion 101blowing device 103annular wall 105connecting wall 107first connecting point 109second connecting point 201blowing device 301blowing device 401blowing device 403extending portion 501blowing device Arotational direction Lstraight line

Claims

1. A blowing device, comprising: a housing including an intake port and an outlet port; a suction flow passage provided inside the housing, air drawn in from the intake port being configured to flow through the suction flow passage; a fan provided inside the housing, the fan being configured to draw in air from the intake port and discharge air from the outlet port; a filter disposed at the intake port; and a partition member provided inside the suction flow passage and disposed between the filter and the fan, wherein the partition member includes a partition wall portion which makes an opening ratio with respect to an opening area of the suction flow passage 40% or more and 80% or less.

2. The blowing device according to claim 1, wherein the partition wall portion increases the opening ratio, with respect to the opening area of the suction flow passage, radially outward from a central axis of the fan.

3. The blowing device according to claim 1 or 2, wherein the partition wall portion includes: one or more annular walls disposed between a central axis of the fan and an inner wall of the suction flow passage in a radial direction, the one or more annular walls being formed in an annular shape; and at least one connecting wall connecting the one or more annular walls and the inner wall of the suction flow passage.

4. The blowing device according to claim 3, wherein the at least one connecting wall includes a plurality of connecting walls provided in a circumferential direction and the radial direction of the suction flow passage, and the plurality of connecting walls includes a plurality of connecting walls located on a radially outer side and a plurality of connecting walls located on a radially inner side, the plurality of connecting walls located on the radially outer side being set to have a wider interval in the circumferential direction than the plurality of connecting walls located on the radially inner side.

5. The blowing device according to claim 3, wherein a radial interval between an outermost annular wall and an annular wall adjacent thereto on a radial inner side is set to be larger than a radial interval between an innermost annular wall and an annular wall adjacent thereto on a radial outer side, the fan having a center axis penetrating the innermost annular wall.

6. The blowing device according to claim 3, wherein the one or more annular walls include an annular wall located on a radially outer side and an annular wall located on a radially inner side; the at least one connecting wall includes a first connecting point and a second connecting point; one end and the other end of the at least one connecting wall are respectively connected to the inner wall of the suction flow passage and the annular wall located on the radially outer side, or to the annular wall located on the radially outer side and the annular wall located on the radially inner side; the one end of the at least one connecting wall is the first connecting point, and the other end of the at least one connecting wall is the second connecting point; and the first connecting point is disposed on an opposite side of a rotational direction of the fan with respect to a straight line passing through the central axis of the fan and the second connecting point.

7. The blowing device according to claim 6, wherein the partition member is provided with an extending portion extending from a vicinity of the second connecting point toward the fan.

8. The blowing device according to claim 3, wherein the at least one connecting wall includes a plurality of connecting walls provided in a circumferential direction and a radial direction of the suction flow passage, the one or more annular walls include an annular wall located on a radially outer side and an annular wall located on a radially inner side; the at least one connecting wall includes a first connecting point and a second connecting point; one end and the other end of the at least one connecting wall are respectively connected to the inner wall of the suction flow passage and the annular wall located on the radially outer side, or to the annular wall located on the radially outer side and the annular wall located on the radially inner side; the one end of the at least one connecting wall is the first connecting point, and the other end of the at least one connecting wall is the second connecting point; and the first connecting point and the second connecting point are disposed at different positions with respect to a circumferential direction of the annular wall.

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