JP2019132271A - Blower - Google Patents

Abstract

To provide a blower making it possible to more reliably support a blowing part by a pedestal part while reducing wear and abnormal sound.SOLUTION: A blower A1 includes a cylindrical casing 4 including a blow port 4a that opens forward, and a blowing part 1 including a cross flow fan 5 that rotates around a vertical central axis. The casing 4 includes a rearward projecting convex part 414 located downstream in a rotation direction of the cross flow fan 5 of the blow port 4a. A gap G between an outer periphery of the cross flow fan 5 and the convex part 414 is set 0.017-0.044 times an outer diameter Ro of the cross flow fan 5.SELECTED DRAWING: Figure 20

Description

  The present invention relates to a blower including a blower unit and a pedestal unit.

  A blower is widely used as a device for generating wind in a room or the like. Patent Document 1 discloses an example of a conventional blower. The blower disclosed in the document includes a blower unit including a cross flow fan and a pedestal unit that supports the blower unit. The blower is supported by the pedestal so as to be rotatable about the vertical axis.

Utility Model Registration No. 3091200

  When the air blower rotates with respect to the pedestal, there are problems such as wear and noise caused by sliding contact between the air blower and the pedestal. On the other hand, if a gap is provided between the air blowing part and the pedestal part in order to alleviate the problem caused by the sliding contact, the air blowing part may be wobbled with respect to the pedestal part.

  The present invention has been conceived under the circumstances described above, and provides a blower that can more reliably support a blower portion with a pedestal portion while suppressing wear and noise. Let it be an issue.

  A blower provided by the present invention includes a pedestal portion and a blower portion supported by the pedestal portion so as to be rotatable about a vertical axis, and is located between the pedestal portion and the blower portion. It is characterized by comprising a member.

  In a preferred embodiment of the present invention, the air blowing section includes a cylindrical casing constituted by a pair of front cover and rear cover, a cross flow fan having a vertical central axis and rotating in the casing. A base part at least partially located inside the casing and supporting a lower end of the central shaft, the base part having a mounting piece extending vertically upward, The cover has a front boss portion extending rearward from the inner peripheral surface, and the rear cover has a rear boss portion extending forward from the inner peripheral surface, and the front boss portion and the rear boss Are fixed to each other with the mounting piece interposed therebetween.

  In a preferred embodiment of the present invention, in the blowing section, both front and rear ends of a support plate that supports the upper end of the central axis of the cross flow fan are supported by the front cover and the rear cover.

  In a preferred embodiment of the present invention, the front cover has a blower opening that opens forward, and a rear protruding convex part that is located downstream of the blower in the rotation direction of the cross flow fan. The clearance between the outer periphery of the cross flow fan and the convex portion is 0.017 to 0.044 times the outer diameter of the cross flow fan, and the circumferential dimension of the convex portion in the rotational direction is The outer peripheral length of the cross flow fan is 0.018 times to 0.071 times.

  In a preferred embodiment of the present invention, the ratio of the outer diameter of the cross flow fan to the inner diameter of the casing is 0.6 to 0.75.

  In a preferred embodiment of the present invention, the air blowing part has an air inlet located on the downstream side in the rotational direction with respect to the convex part and located on the upstream side in the rotational direction with respect to the air outlet. The direction which the inlet port occupies in the rotation direction is 100 ° to 180 °.

  In a preferred embodiment of the present invention, the intake port includes a portion of the front cover that is formed on the downstream side in the rotational direction with respect to the convex portion.

  According to this invention, the said sliding member is arrange | positioned between the said ventilation part and the said base part. Thereby, it can avoid that the said ventilation part and the said base part slide directly. Moreover, even if sliding with the said ventilation part or the said base part, and the said sliding member arises, wear and abnormal noise can be suppressed. Furthermore, by allowing sliding between the air blowing part or the pedestal part and the sliding member, a gap for avoiding sliding is provided between the air blowing part or the pedestal part and the sliding member. It is not necessary to provide, and it is possible to suppress the air blowing part from wobbling with respect to the pedestal part. Therefore, according to the blower, the blower can be more reliably supported by the pedestal while suppressing wear and noise.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a perspective view showing one embodiment of a blower concerning the present invention. It is a perspective view showing one embodiment of a blower concerning the present invention. It is a front view which shows one Embodiment of the air blower which concerns on this invention. It is a rear view which shows one Embodiment of the air blower which concerns on this invention. It is a left view which shows one Embodiment of the air blower which concerns on this invention. It is a right view which shows one Embodiment of the air blower which concerns on this invention. It is a top view which shows one Embodiment of the air blower which concerns on this invention. It is a disassembled perspective view which shows one Embodiment of the air blower which concerns on this invention. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. It is sectional drawing which follows the XI-XI line of FIG. It is a principal part expansion perspective view which shows the support structure of the ventilation part by the base part of one Embodiment of the air blower which concerns on this invention. It is a principal part expanded sectional view which shows the support structure of the ventilation part by the base part of one Embodiment of the air blower which concerns on this invention. An example of a sliding member is shown, (a) is a perspective view, (b) is a plan view, and (c) is a front view. It is a principal part expanded sectional perspective view which shows the casing fixing structure of the ventilation part of one Embodiment of the air blower which concerns on this invention. An example of the rotation base part of a ventilation part is shown, (a) is a perspective view, (b) is a top view, (c) is a front view. It is a principal part expanded sectional perspective view which shows the rotation mechanism of one Embodiment of the air blower which concerns on this invention. It is a principal part expanded sectional perspective view which shows the crossflow fan support structure of one Embodiment of the air blower which concerns on this invention. It is a principal part expanded sectional view which shows one Embodiment of the air blower which concerns on this invention. It is principal part sectional drawing which shows an example of the casing and crossflow fan of one Embodiment of the air blower which concern on this invention. The base part of one Embodiment of the air blower which concerns on this invention is shown, (a) is a top view, (b) is a bottom view. (A) is sectional drawing which follows the XXa-XXa line | wire of FIG.21 (b), (b) is sectional drawing which follows the XXb-XXb line | wire of FIG.21 (b). It is a disassembled perspective view which shows the base part of one Embodiment of the air blower which concerns on this invention. It is a principal part expanded sectional view which shows the support structure of the ventilation part by the base part of the 1st modification of one Embodiment of the air blower which concerns on this invention. It is a principal part expanded sectional view which shows the support structure of the ventilation part by the base part of the 2nd modification of one Embodiment of the air blower which concerns on this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

<First Embodiment>
1-23 has shown the air blower which concerns on 1st Embodiment of this invention. The blower A1 of this embodiment includes a blower unit 1, a pedestal unit 2, and a sliding member 3. The blower A1 is used as a device for generating wind, for example, placed on a floor surface in a room. The z direction in the figure is the vertical direction when the blower A1 is used. Both the x direction and the y direction are perpendicular to the z direction and are perpendicular to each other. Note that the x direction may be referred to as the left-right direction, the y direction as the front-rear direction, and the z direction as the up-down direction.

<Blower part 1>
As shown in FIGS. 1 to 6, 8, 9, and 10, the air blower 1 is supported by the base 2 so as to be rotatable about the vertical axis Oz. The blower unit 1 includes a casing 4, a cross flow fan 5, a blower motor 59, a rotation drive unit 61, a rotation base unit 62, a fixed base unit 63, and an operation control unit 7.

<Case 4>
As shown in FIGS. 8 to 11, the casing 4 accommodates the cross flow fan 5 therein, and has a blower port 4 a and an intake port 4 b. The blower opening 4a is a part through which the wind generated by the cross flow fan 5 is blown. The intake port 4 b is a part for sucking outside air to the cross flow fan 5. The dimensions and positional relationships of the air blowing port 4a, the air intake port 4b, and the cross flow fan 5 will be described later.

  In the present embodiment, the casing 4 is constituted by a front cover 41 and a rear cover 42. In the illustrated example, the casing 4 includes a louver portion 43. The casing 4 has a cylindrical shape with the z direction as an axial direction, and has a substantially cylindrical shape in the illustrated example. The front cover 41 and the rear cover 42 are resin parts made of, for example, ABS resin formed using a mold.

  The front cover 41 is disposed in the front in the y direction, and constitutes the front half portion of the casing 4 in the y direction. The front cover 41 of the present embodiment includes a cover body 411, a blower port 412, a front intake port 413, and a convex portion 414. The cover body 411 is a substantially semi-cylindrical part.

  The air blowing port 412 is a part where the cover body 411 is partially opened toward the front in the y direction. The shape and size of the air blowing port 412 are not particularly limited, and in the illustrated example, the air blowing port 412 has a long rectangular shape in the y direction, with the z direction as the long direction and the x direction as the short direction. In the present embodiment, the air outlet 4 a of the casing 4 is configured by an air outlet 412 formed in the front cover 41. Further, the air outlet 412 may have a plurality of frame members orthogonal to each other as illustrated. These frame members fulfill the function of increasing the directionality of the air blown from the blower opening 412, for example.

  The front intake port 413 is a part of the cover body 411 where a region located on the downstream side in the rotational direction N of the cross flow fan 5 with respect to the air blowing port 412 is partially opened. The front intake port 413 is formed adjacent to the side end of the front cover 41. The shape and size of the front intake port 413 are not particularly limited, and in the illustrated example, the front intake port 413 has a long rectangular shape whose longitudinal direction is the z direction. Further, in this example, the z-direction dimension of the front intake port 413 is substantially the same as the z-direction dimension of the air blowing port 412. Further, the front intake port 413 may have a plurality of frame members orthogonal to each other as shown in the figure. These frame members fulfill a function of preventing foreign matter from being sucked in from, for example, the front intake port 413.

  The convex portion 414 is located on the downstream side in the rotation direction N of the air blowing port 412, and protrudes rearward from the cover body 411 in the y direction between the air blowing port 412 (4 a) and the front air inlet 413 (air inlet 4 b). It is a part. In the illustrated example, the convex portion 414 is formed in the same region as the blower port 412 and the front intake port 413 in the z direction.

  The rear cover 42 is disposed rearward in the y direction and constitutes a rear portion of the casing 4 in the y direction. The rear cover 42 according to this embodiment includes a cover main body 421 and a rear intake port 423. The cover main body 421 is a substantially semi-cylindrical portion.

  The rear air inlet 423 is a part of the cover body 421 that is adjacent to the front air inlet 413 of the front cover 41 and that is adjacent to the downstream side in the rotational direction N. The shape and size of the rear intake port 423 are not particularly limited, and in the illustrated example, the rear intake port 423 has a long rectangular shape whose longitudinal direction is the z direction. Further, in this example, the z-direction dimension of the rear intake port 423 is substantially the same as the z-direction dimension of the air blowing port 412 and the front intake port 413. Further, the rear intake port 423 may include a plurality of frame members that are orthogonal to each other, as illustrated. These frame members function to prevent foreign matter from being sucked in from, for example, the rear intake port 423. In the present embodiment, the intake port 4b of the casing 4 is configured by the front intake port 413 and the rear intake port 423 adjacent to each other.

  The louver portion 43 is disposed in front of the air outlet 412 of the front cover 41 in the y direction, and is fixed to the cover body 411 of the front cover 41, for example. The louver part 43 is for adjusting the direction of the wind from the air blowing port 412 in the z direction. The louver part 43 includes a frame 431 and a plurality of wing plates 432. The frame 431 is attached to the cover main body 411 of the front cover 41, and has an elongated rectangular opening with the z direction as the longitudinal direction when viewed in the y direction. This opening is, for example, approximately the same size as the air blowing port 412. The frame 431 is a resin part formed using, for example, a mold. The plurality of wing plates 432 are attached to the opening of the frame 431. In the illustrated example, the plurality of slats 432 are spaced apart from each other in the z direction, and each can rotate about the y direction. Moreover, the louver part 43 may have a rod for aligning the rotational postures of the plurality of blades 432. The wing plate 432 is made of, for example, a transparent or translucent synthetic resin.

<Cross flow fan 5>
As shown in FIGS. 8 to 11, the cross flow fan 5 is housed in the casing 4 and is an example of an impeller for generating wind. The cross flow fan 5 has a central shaft 51, a plurality of blades 52, and a frame plate 53. The central axis 51 has a vertical shape along the z direction, and is provided in a protruding shape at the upper part of the cross flow fan 5 in the z direction. The central shaft 51 is made of metal, for example. The plurality of blades 52 are arranged in a circle centered on the central axis 51 in the z direction, and each has a shape extending in the z direction. The frame plate 53 supports a plurality of blades 52 in a circular arrangement, and a central shaft 51 is attached to the frame plate 53. The dimension of the cross flow fan 5 in the z direction is substantially the same as that of the air outlet 4a and the air inlet 4b. The plurality of blades 52 and the frame plate 53 of the cross flow fan 5 are made of AS (acrylonitrile / styrene copolymer) resin. The blade 52 and the frame plate 53 may contain 20% to 30% glass fiber.

<Blower motor 59>
The blower motor 59 is a drive source that rotates the cross flow fan 5. In the present embodiment, as shown in FIGS. 8 to 10, the blower motor 59 is housed in the casing 4 and is disposed immediately below the cross flow fan 5 in the z direction. A drive shaft of the blower motor 59 is connected to the lower end of the cross flow fan 5. The type of the blower motor 59 is not particularly limited, and various AC motors and DC motors suitable for rotational driving of the crossflow fan 5 are appropriately employed.

  Here, with reference to FIG.18 and FIG.19, the support structure of the center axis | shaft 51 of the crossflow fan 5 and the fixing structure in the z direction upper part of the front cover 41 and the rear cover 42 are demonstrated. FIG. 18 is an enlarged cross-sectional perspective view of a main part including a cross section in a yz plane located on the near side in the x-direction diagram with respect to the vertical axis Oz with the operation control unit 7 omitted. FIG. 19 is an enlarged cross-sectional view of a main part in a yz plane passing through the vertical axis Oz.

  In the present embodiment, the blower unit 1 of the blower A1 has a support plate 55. The support plate 55 is for supporting the central shaft 51 of the cross flow fan 5 by the casing 4. In the illustrated example, the support plate 55 has a main plate portion 551 and an upright plate portion 552, and is formed, for example, by cutting and bending a metal plate. The main plate portion 551 is a plate-like portion along the xy plane. The upright plate portion 552 extends upward in the z direction from the front end of the main plate portion 551 in the y direction. In the illustrated example, an opening is formed in the main plate portion 551, and a rubber member 553 is fitted. A bush 554 is built in the rubber member 553. The central shaft 51 is inserted through the bush 554. The bush 554 supports the central shaft 51 in a rotatable manner.

  In the present embodiment, a pair of front boss portions 416 are formed on the front cover 41. The pair of front boss portions 416 extends rearward from the inner peripheral surface of the cover body 411 in the y direction. The pair of front boss portions 416 are spaced apart in the x direction. Each of the pair of front boss portions 416 is formed with a female screw. The front ends of the pair of front boss portions 416 are in contact with the upright plate portion 552 of the support plate 55. A pair of through holes are formed in the upright plate portion 552 of the support plate 55, and coincide with the female threads of the pair of front boss portions 416. A pair of screws 446 are individually screwed into the pair of front boss portions 416 through the pair of through holes of the upright plate portion 552. Thus, the upright plate portion 552 is fixed to the pair of front boss portions 416.

  Further, the rear cover 42 is formed with a pair of support pieces 429. The pair of support pieces 429 extend from the cover body 421 of the rear cover 42 forward in the y direction. The pair of support pieces 429 are spaced apart in the x direction. Each of the pair of support pieces 429 has a notch 429a. The notch 429a is recessed from the front end of the support piece 429 in the y direction. The rear ends of the support plate 55 in the y direction are accommodated in the notches 429a of the pair of support pieces 429. The rear end of the support plate 55 in the y direction may be fitted into the notch 429a, or a slight gap may exist. Unlike the illustrated example, the rear end of the support plate 55 in the y direction and the pair of support pieces 429 may be fixed to each other by bonding, screws, or the like.

  In the illustrated example, a pair of front boss portions 415 are formed on the front cover 41, and a pair of rear boss portions 425 are formed on the rear cover 42. The pair of front boss portions 415 and the pair of rear boss portions 425 are provided immediately above the support plate 55 in the z direction. The pair of front boss portions 415 extends rearward from the cover body 411 in the y direction. The pair of front boss portions 415 are spaced from each other in the x direction. The pair of rear boss portions 425 extend from the cover body 421 forward in the y direction. The pair of rear boss portions 425 are spaced apart in the x direction. In the illustrated example, a female screw is formed in each of the pair of front boss portions 415, and a through hole is formed in each of the pair of rear boss portions 425. The screws 445 shown in FIG. 8 are screwed into the female screws of the pair of front boss portions 415 through the through holes of the pair of rear boss portions 425, so that the upper portions in the z direction of the front cover 41 and the rear cover 42 are fixed. Has been.

  Next, with reference to FIG. 20, the dimension, the positional relationship, etc. of the ventilation port 4a of the casing 4, the inlet port 4b, and the crossflow fan 5 are demonstrated. In FIG. 20, the rotational direction N around the vertical axis Oz of the cross flow fan 5 and the radial direction r, which is a direction extending radially from the vertical axis Oz, will be used as appropriate.

  First, the convex portion 414 is located on the downstream side in the rotation direction N of the air blowing port 412, and the gas sent through the casing 4 by the cross flow fan 5 is on the upstream side in the rotational direction N of the convex portion 414. A space that is compressed and discharged forward in the y direction toward the air blowing port 4a is formed. In the illustrated example, when the outer diameter Ro of the cross flow fan 5 is 90 mm, the gap G between the outer periphery of the cross flow fan 5 and the convex portion 414 is preferably 1.5 mm to 4.0 mm. The outer diameter Ro of the flow fan 5 is 0.017 to 0.044 times. Next, the circumferential dimension L in the rotation direction N of the tip portion of the convex portion 414 is preferably 5.0 mm to 20.0 mm, and more preferably 10.0 mm to 15.0 mm. That is, the circumferential dimension L is preferably 0.018 to 0.071 times the outer peripheral length of the cross flow fan 5 (π times the outer diameter Ro of the cross flow fan 5), more preferably 0.035. Times to 0.053 times.

  Next, a space along the rotational direction N is formed between the cross flow fan 5 and the casing 4 from the downstream side in the rotational direction N of the convex portion 414. This space is a space through which the gas sucked from the intake port 4b is sent in the rotation direction N. The ratio between the outer diameter Ro of the cross flow fan 5 and the inner diameter Ri of the casing 4 in this space is preferably 0.6 to 0.75. For example, when the outer diameter Ro of the cross flow fan 5 is 90 mm, the inner diameter Ri of the casing 4 is preferably 120 mm to 150 mm, and is set to 130 mm, for example.

  Further, the azimuth (angle range of the central angle centered on the vertical axis Oz) P occupied by the intake port 4b in the rotational direction N is preferably 100 ° to 180 °. In the illustrated example, the direction P is about 155 °. The air inlet 4b is arranged adjacent to the convex portion 414 on the downstream side in the rotation direction N. As a measure for providing such an intake port 4b in the direction P, in the present embodiment, the intake port 4b is constituted by a front intake port 413 and a rear intake port 423. That is, the intake port 4 b includes a front intake port 413 formed in the front cover 41 on the downstream side in the rotation direction N with respect to the convex portion 414.

<Rotation base 62>
The rotation base 62 supports the casing 4, the cross flow fan 5, and the blower motor 59. As shown in FIGS. 15 and 16, the rotation base portion 62 includes a main plate portion 621, a pair of attachment pieces 622, a rotation shaft 623, a pair of motor fixing pieces 624, a plurality of ball support pieces 625, and a plurality of rolling balls 626. Have In the fixing structure of the front cover 41 and the rear cover 42 described later, the rotation base portion 62 corresponds to a “base portion” in the present invention. A portion of the rotation base portion 62 excluding the plurality of rolling balls 626 is a resin component formed using, for example, a mold.

  The main plate portion 621 is a plate-like portion along the xy plane, and in this embodiment, the main plate portion 621 has a shape in which a part of the disc is cut out when viewed in the z direction. Each of the pair of attachment pieces 622 extends upward from the main plate portion 621 in the z direction. In the illustrated example, the pair of attachment pieces 622 are spaced apart on both sides in the x direction near the rear end of the main plate portion 621 in the y direction. The rotation shaft 623 defines an axis about which the rotation base 62 rotates, and has a vertical shape along the z direction. In the illustrated example, the rotating shaft 623 has a hollow structure. The pair of motor fixing pieces 624 is for supporting the blower motor 59. The pair of motor fixing pieces 624 extends from the main plate portion 621 upward in the z direction. In the illustrated example, the pair of motor fixing pieces 624 are spaced apart on both sides in the x direction near the center of the main plate portion 621 in the y direction. In the illustrated example, the height of the motor fixing piece 624 in the z direction is higher than the height of the mounting piece 622 in the z direction. The plurality of ball support pieces 625 extend downward from the main plate portion 621 in the z direction. The plurality of ball support pieces 625 have a circular arrangement with the rotation shaft 623 as the center. The plurality of rolling balls 626 are individually supported rotatably at the lower ends in the z direction of the plurality of ball support pieces 625.

  Here, with reference to FIG. 15, the fixing structure in the lower part of the front cover 41 and the rear cover 42 in the z direction will be described.

  In the present embodiment, the front cover 41 has a pair of front boss portions 417. Each of the pair of front boss portions 417 extends rearward from the inner peripheral surface of the cover body 411 in the y direction. Further, the pair of front boss portions 417 are spaced apart in the x direction. The rear cover 42 has a pair of rear boss portions 427. Each of the pair of rear boss portions 427 extends from the inner peripheral surface of the cover main body 421 forward in the y direction. Further, the pair of rear boss portions 427 are spaced apart in the x direction. The pair of front boss portions 417 and the pair of rear boss portions 427 coincide with each other when viewed in the y direction. FIG. 15 is an enlarged cross-sectional perspective view of a main part including a cross section in a yz plane passing through the centers of one front boss portion 417 and the rear boss portion 427.

  The front boss portion 417 and the rear boss portion 427 are fixed to each other with the attachment piece 622 of the rotation base portion 62 interposed therebetween. In the illustrated example, an internal thread is formed in the front boss portion 417, and a through hole is formed in the rear boss portion 427 and the attachment piece 622. The screw 447 is screwed into the female screw of the front boss part 417 through the through hole of the rear boss part 427 and the mounting piece 622. In the present embodiment, the attachment piece 622 is formed near the rear end of the main plate portion 621 in the y direction, and is positioned rearward in the casing 4 in the y direction. For this reason, the y-direction length of the rear boss portion 427 is shorter than the y-direction length of the front boss portion 417.

<Fixed base 63>
The fixed base portion 63 is a portion that is fixed to the pedestal portion 2. In the present embodiment, the rotation base portion 62 rotates relative to the fixed base portion 63, whereby the blower portion 1 rotates relative to the pedestal portion 2. As shown in FIGS. 8 to 10, 12, and 17, the fixed base portion 63 includes a base main body 631 and a rail member 632. The fixed base portion 63 is disposed immediately below the rotation base portion 62 in the z direction.

  The base main body 631 is a part that exhibits rigidity required for fixing to the pedestal 2 and rotation of the rotary base 62. In the illustrated example, the base main body 631 has a circular shape when viewed in the z direction, and is, for example, a resin component formed using a mold. The rail member 632 is attached to the upper side of the base body 631 in the z direction. In the illustrated example, the rail member 632 is a ring-shaped member, for example, made of metal.

  In the present embodiment, the rotation shaft 623 of the rotation base portion 62 is rotatably attached to the base main body 631 of the fixed base portion 63. In addition, the plurality of rolling balls 626 of the rotation base portion 62 are in contact with the rail member 632 of the fixed base portion 63. When the rotation base portion 62 rotates with respect to the fixed base portion 63 around the rotation shaft 623, the plurality of rolling balls 626 roll on the rail member 632.

<Rotation drive unit 61>
The rotation drive unit 61 is for rotating the rotation base unit 62 with respect to the fixed base unit 63. As shown in FIG. 17, in the illustrated example, the rotation drive unit 61 includes a rotation motor 611 and a link mechanism 612.

  The rotation motor 611 is a drive source that rotates the rotation base portion 62, and is attached to the upper surface of the main plate portion 621 of the rotation base portion 62. The drive shaft of the rotation motor 611 passes through the main plate portion 621 and protrudes downward in the z direction of the main plate portion 621. As the rotation motor 611, various AC motors and DC motors suitable for rotational driving of the rotation base portion 62 are appropriately employed.

  The link mechanism 612 is a mechanism for converting the driving force of the rotating motor 611 into a rotating force that rotates the rotating base portion 62. In the illustrated example, the link mechanism 612 includes a link arm 613 and a link arm 614. One end of the link arm 613 is connected to the drive shaft of the rotary motor 611. One end of the link arm 614 is rotatably attached to the other end of the link arm 613. The other end of the link arm 614 is fixed to a fixing portion 633 formed on the base body 631 of the fixed base portion 63.

<Operation control unit 7>
The operation control unit 7 includes a control unit for performing rotational drive control of the blower motor 59 and the rotary motor 611, and an operation unit for a user of the blower A1 to perform a predetermined operation. The control unit is appropriately configured by a CPU, a memory, an interface, and the like. For example, a plurality of electronic components are mounted on a wiring board. The control unit is accommodated in a position that is not visible from the outside.

  The operation control unit 7 according to the present embodiment includes an apparatus operation unit 71 and a remote control operation unit 72 as illustrated in FIGS. 1, 2, 4, 7, and 8. In the present embodiment, the device operation unit 71 is located on the upper surface of the blower A1 in the z direction, is provided so as to close the upper opening of the casing 4 in the z direction, and is operated by a user such as a dial or a button. It has an operation element. The remote control operation unit 72 is for the user to operate at a position away from the blower A1, and for example, infrared communication is used. In the illustrated example, the remote control operation unit 72 can be accommodated in a recess provided in the rear cover 42 of the casing 4.

<Pedestal part 2>
As shown in FIGS. 1-8, the base part 2 is a site | part contact | abutted to a floor surface etc. when mounting air blower A1 on a floor surface etc., and is supporting the air blower part 1 rotatably. In the present embodiment, as shown in FIGS. 21 to 23, the pedestal portion 2 includes a front portion 21 and a rear portion 22. Note that the pedestal portion 2 is not limited to a two-divided structure, and may be an integrally formed structure or three or more divided structures. The front part 21 and the rear part 22 are resin parts made of, for example, ABS resin formed using a mold.

  The front portion 21 constitutes a front portion in the y direction of the pedestal portion 2, and includes an umbrella-shaped portion 211, a support portion 212, and a plurality of locking holes 213. The umbrella-shaped portion 211 is a portion that is inclined so that its radial dimension increases toward the lower side in the z direction, and has a semicircular shape when viewed in the z direction. The support part 212 is provided inside the umbrella-like part 211 as viewed in the z direction, and is a part to which the fixed base part 63 is fixed. The plurality of locking holes 213 are arranged along the x direction when viewed in the z direction, and each is a through hole along the z direction. In the illustrated example, four locking holes 213 are provided.

  The rear portion 22 constitutes a rear portion of the base portion 2 in the y direction, and includes an umbrella-shaped portion 221, a support portion 222, and a plurality of pin portions 223. The umbrella-shaped portion 221 is a portion that is inclined so that its radial dimension increases toward the lower side in the z direction, and has a semicircular shape when viewed in the z direction. The umbrella-shaped part 221 constitutes an annular umbrella-shaped part together with the umbrella-shaped part 211. The support part 222 is provided inside the umbrella-shaped part 221 as viewed in the z direction, and constitutes a part to which the fixed base part 63 is fixed together with the support part 212. The plurality of pin portions 223 are disposed along the x direction when viewed in the z direction, and each is a protruding portion that extends downward in the z direction. In the illustrated example, four pin portions 223 are provided.

  As shown in FIG. 23, the front portion 21 and the rear portion 22 are locked to each other when the plurality of pin portions 223 of the rear portion 22 are inserted into the plurality of locking holes 213 of the front portion 21. In the present embodiment, the cable 29 is inserted through the pedestal 2. The cable 29 is for supplying power supplied to the blower motor 59, the rotary motor 611, the operation control unit 7, and the like. For example, one portion of the cable 29 extends from the outer periphery of the pedestal portion 2 to the outside, and the other portion is inserted into the rotation shaft 623 of the rotation base portion 62 and extends into the casing 4.

<Sliding member 3>
As shown in FIGS. 1 to 6 and 8, the sliding member 3 is located between the air blowing part 1 and the pedestal part 2. The sliding member 3 slides with at least one of the blower unit 1 or the pedestal unit 2, and is preferably made of a slidable resin. The slidable resin has a low coefficient of friction, is excellent in wear resistance, self-lubricating property, and high-speed slipperiness, has low attack on the mating material, and hardly generates frictional noise and vibration. An example of the slidable resin is polyacetal. In the example shown in FIGS. 12 to 14, the sliding member 3 has a ring plate portion 31 and a plurality of locking portions 32, and is attached to the casing 4 of the blower portion 1.

  The ring plate portion 31 is a ring-shaped plate-like portion as viewed in the z direction. In the illustrated example, the inner diameter of the ring plate portion 31 is larger than the outer diameter of the base main body 631 of the fixed base portion 63. The plurality of locking portions 32 extend from the ring plate portion 31 upward in the z direction. In the illustrated example, four locking portions 32 are circularly arranged around the vertical axis Oz, and are provided every 90 °. As shown in FIG. 13, the plurality of locking portions 32 are locked to the lower ends in the z direction of the front cover 41 and the rear cover 42 of the casing 4. For this reason, when the air blowing part 1 rotates with respect to the pedestal part 2, the z direction lower surface of the ring plate part 31 of the sliding member 3 slides with the z direction upper end part of the pedestal part 2.

  Next, the operation of the blower A1 will be described.

  According to the present embodiment, the sliding member 3 is disposed between the blower unit 1 and the pedestal unit 2. Thereby, it can avoid that the ventilation part 1 and the base part 2 slide directly. Further, since the sliding member 3 is made of a material that hardly generates wear or abnormal noise, the wear or abnormal noise can be suppressed even if sliding with the air blowing unit 1 occurs. Further, since the sliding between the air blowing unit 1 and the sliding member 3 is allowed, there is no need to provide a gap for avoiding the sliding between the air blowing unit 1 and the sliding member 3. Can be prevented from wobbling with respect to the base 2. Therefore, according to the air blower A1, the air blower 1 can be more reliably supported by the base 2 while suppressing wear and noise.

  As shown in FIG. 15, the front boss portion 417 of the front cover 41 and the rear boss portion 427 of the rear cover 42 are fixed to each other with the attachment piece 622 of the rotation base portion 62 interposed therebetween. As a result, a structure in which the front boss portion 417 and the rear boss portion 427 are supported by the attachment piece 622 is realized. Unlike the present embodiment, for example, in a structure in which only the front boss portion 417 extending from the front cover 41 toward the rear in the y direction is supported by the mounting piece 622, the rear cover 42 is engaged with the front cover 41. It will be attached by fitting with a pawl, an insertion pin or the like, and the front cover 41 and the rear cover 42 of the casing 4 are likely to be loose. Further, in a structure in which a front boss portion 417 extending rearward in the y direction and a rear boss portion 427 extending forward in the y direction are coupled to each other, the front boss portion 417 and the rear boss portion 427 are combined. As a result, a portion extending in the y direction is formed, and there is a concern about insufficient rigidity. According to this embodiment, the rigidity including the front boss portion 417 and the rear boss portion 427 is enhanced by the fixing structure in which the front boss portion 417 of the front cover 41 and the rear boss portion 427 of the rear cover 42 sandwich the attachment piece 622. It is possible to prevent the front cover 41 and the rear cover 42 from rattling. A screw 447 that connects the front boss portion 417 and the rear boss portion 427 is inserted through the rear boss portion 427 from the rear in the y direction and is screwed to the front boss portion 417. For this reason, the screw 447 is not visually recognized from the front in the y direction of the blower A1. This is suitable for keeping the aesthetic appearance of the blower A1 well. Further, by extending the front boss part 417 longer than the rear boss part 427, the connecting positions of the front boss part 417, the rear boss part 427, and the mounting piece 622 can be arranged rearward in the y direction. . This prevents the cable 29 and other electrical wiring, which are generally laid near the center of the casing 4, from being accidentally sandwiched between the front boss 417, the rear boss 427, and the mounting piece 622. can do.

  The blower motor 59 that rotationally drives the cross flow fan 5 is connected to the lower end of the cross flow fan 5 in the z direction. For this reason, when the cross flow fan 5 is rotated by the blower motor 59, there is a concern that the central shaft 51 provided at the upper end of the cross flow fan 5 vibrates excessively. In the present embodiment, as shown in FIGS. 18 and 19, the central shaft 51 of the cross flow fan 5 is supported by the support plate 55. The support plate 55 has an upright plate portion 552 at the front in the y direction fixed to the front boss portion 416 of the front cover 41, and the rear end of the y direction is supported by the support piece 429 of the rear cover 42. As a result, the support plate 55 is not a cantilever support by the front cover 41 alone, but has a support structure in which the front cover 41 and the rear cover 42 are both supported. Therefore, the support plate 55 can be more firmly supported by the front cover 41 and the rear cover 42, and the vibration of the central shaft 51 can be suppressed. Further, in the present embodiment, the front boss portion 415 of the front cover 41 and the rear boss portion 425 of the rear cover 42 are coupled immediately above the support plate 55 in the z direction. With this connection, the support plate 55 can be more reliably supported by the front cover 41 and the rear cover 42, which is preferable for preventing vibration of the central shaft 51. Further, a screw 445 that couples the front boss portion 415 and the rear boss portion 425 is inserted through the rear boss portion 425 from the rear in the y direction and is screwed to the front boss portion 415. For this reason, the screw 445 is not visually recognized from the front of the blower A1 in the y direction, and is suitable for maintaining a good appearance of the blower A1.

  As shown in FIG. 20, when the outer diameter Ro of the cross flow fan 5 is 90 mm, the gap G between the outer periphery of the cross flow fan 5 and the convex portion 414 is preferably 1.5 mm to 4.0 mm. The outer diameter Ro of the cross flow fan 5 is set to 0.017 to 0.044 times. Thereby, it is possible to make it difficult for the gas sent by the cross flow fan 5 to pass through the gap G between the convex portion 414 and the cross flow fan 5 to the downstream side in the rotation direction N. Therefore, the gas can be sufficiently compressed by the space on the upstream side in the rotation direction N of the convex portion 414, and the air volume from the blower port 4a can be improved. If the gap G is less than 1.5 mm (less than 0.017 times the outer diameter Ro of the cross flow fan 5), the cross flow fan 5 and the convex portion 414 may come into contact with each other when the cross flow fan 5 rotates. On the other hand, when the gap G exceeds 4.0 mm (0.044 times the outer diameter Ro of the cross flow fan 5), gas easily passes through the gap between the cross flow fan 5 and the convex portion 414, and there is a concern about a decrease in the air volume. Is done.

  Moreover, the circumferential direction dimension L of the convex part 414 becomes like this. Preferably it is 5.0 mm-20.0 mm, More preferably, it is 10.0 mm-15.0 mm. That is, the circumferential dimension L is preferably 0.018 to 0.071 times the outer peripheral length of the cross flow fan 5 (π times the outer diameter Ro of the cross flow fan 5), more preferably 0.035. Times to 0.053 times. When the circumferential dimension L is less than 5.0 mm (less than 0.018 times the outer peripheral length of the cross flow fan 5), gas easily passes through the gap between the cross flow fan 5 and the convex portion 414, and the air volume is reduced. Is concerned. On the other hand, if the circumferential dimension L exceeds 20.0 mm (0.071 times the outer peripheral length of the cross flow fan 5), the pressure fluctuation in the gap between the cross flow fan 5 and the convex portion 414 becomes excessive, and the cross flow fan. There is a concern about the vibration of 5 and the contact between the cross flow fan 5 and the convex portion 414 associated therewith.

  Next, when the ratio of the outer diameter Ro of the cross flow fan 5 to the inner diameter Ri of the casing 4 is preferably 0.6 to 0.75, and the outer diameter Ro of the cross flow fan 5 is 90 mm, the casing 4 The inner diameter Ri is 120 mm to 150 mm, and is set to 130 mm, for example. Thereby, it is possible to ensure a reasonably wide space through which the gas passes between the casing 4 and the cross flow fan 5 by the rotation of the cross flow fan 5, and it is possible to promote the improvement of the air volume. If the ratio of the outer diameter Ro of the cross flow fan 5 to the inner diameter Ri of the casing 4 is less than 0.6, the outer diameter Ro of the cross flow fan 5 becomes too small, and there is a concern about a reduction in the air volume. On the other hand, if the ratio between the outer diameter Ro of the cross flow fan 5 and the inner diameter Ri of the casing 4 exceeds 0.75, the space through which the gas between the casing 4 and the cross flow fan 5 passes becomes narrow, and the air volume decreases. Concerned.

  Further, the direction P occupied by the intake port 4b in the rotation direction N is 100 ° to 180 °. Thereby, it is possible to suck more gas from the intake port 4b. This is advantageous for improving the air volume of the blower A1. If the azimuth P is less than 100 °, it becomes difficult to suck a sufficient amount of gas from the intake port 4b, and there is a concern about a decrease in the air volume. On the other hand, when the azimuth P exceeds 180 °, the balance between the intake air and the exhaust (air blowing) is lost, and the air is sucked in the upstream side in the rotational direction N of the air inlet 4b, and the air is downstream in the rotational direction N of the air inlet 4b. It can happen that it is discharged outward. Moreover, it becomes difficult to ensure sufficient strength of the casing 4.

  A region adjacent to the downstream side in the rotation direction N of the convex portion 414 is likely to be a negative pressure due to the rotation of the cross flow fan 5, and vibration is likely to occur due to the front cover 41 being sucked. By providing the front intake port 413 in this region, an effect of reducing vibration can be expected in addition to an improvement in the intake amount.

  As shown in FIGS. 21 to 23, the front portion 21 and the rear portion 22 are coupled to each other by locking with a plurality of locking holes 213 and a plurality of pin portions 223. Thereby, the rigidity of the base part 2 can be improved and the air blower part 1 can be supported more stably.

  In addition, since the plurality of blades 52 and the frame plate 53 of the cross flow fan 5 are made of AS resin, the rigidity of the cross flow fan 5 can be improved and the surface hardness can be improved. Can be configured to prevent sticking. Further, by containing 20% to 30% glass fiber in the blade 52 and the frame plate 53, there is an advantage that the warpage of the cross flow fan 5 can be suppressed and the rigidity can be improved.

  24 and 25 show a modification of the present invention. In these drawings, the same or similar elements as those of the above embodiment are denoted by the same reference numerals as those of the above embodiment.

<First Embodiment First Modification>
FIG. 24 shows a first modification of the blower A1. In the blower A <b> 11 of this modification, the plurality of locking portions 32 of the sliding member 3 are locked to the pedestal portion 2. Thereby, the sliding member 3 is fixed to the pedestal portion 2. When the blower 1 rotates with respect to the pedestal 2, the z-direction upper surface of the ring plate 31 of the sliding member 3 slides with the lower z-direction portion of the blower 1 (casing 4).

<First Embodiment Second Modification>
FIG. 25 shows a second modification of the blower A1. In the blower A12 of the present modified example, the sliding member 3 is not locked or fixed to either the blower unit 1 or the pedestal unit 2, and is configured by only the ring plate portion 31, for example. When the air blower 1 rotates with respect to the pedestal 2, the upper surface in the z direction of the ring plate portion 31 of the sliding member 3 slides with the lower end portion in the z direction of the air blower 1 (casing 4). The direction lower surface slides with the upper end portion in the z direction of the pedestal 2. However, the configuration is not limited to the configuration in which sliding is caused simultaneously on both surfaces of the ring plate portion 31, and the configuration in which sliding is generated only on one of the upper and lower surfaces of the ring plate portion 31 or alternately may be employed.

  As can be understood from these modified examples, the sliding member 3 may be configured to slide with at least one of the blower unit 1 and the pedestal unit 2.

  The blower according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the blower according to the present invention can be varied in design in various ways.

  The blower according to the present invention is not limited to the configuration in which the blower is provided with a cross flow fan. As long as the air blowing unit can perform the air blowing function, various impellers can be used instead of the cross flow fan.

A1, A11, A12: Air blower 1: Air blowing part 2: Base part 3: Sliding member 4: Casing 4a: Air blowing port 4b: Air inlet 5: Cross flow fan 7: Operation control part 21: Front part 22: Rear part 29 : Cable 31: Ring plate portion 32: Locking portion 41: Front cover 42: Rear cover 43: Louver portion 51: Center shaft 52: Blade 53: Frame plate 55: Support plate 59: Blower motor 61: Rotation drive portion 62: Rotating base portion 63: Fixed base portion 71: Device operation portion 72: Remote control operation portion 211: Umbrella-shaped portion 212: Support portion 213: Locking hole 221: Umbrella-shaped portion 222: Support portion 223: Pin portion 411: Cover body 412 : Blower port 413: Front side intake port 414: Convex portions 415, 416 and 417: Front boss portion 421: Cover body 423: Rear side intake ports 425 and 427: Rear boss portion 429: Support Piece 429a: Notch 431: Frame 432: Blades 445, 446, 447: Screw 551: Main plate 552: Standing plate 553: Rubber member 554: Bush 611: Rotating motor 612: Link mechanism 613, 614: Link arm 621: Main plate portion 622: Mounting piece 623: Rotating shaft 624: Motor fixing piece 625: Ball support piece 626: Rolling ball 631: Base body 632: Rail member 633: Fixing portion G: Gap L: Circumferential dimension Oz: Vertical Axis P: Orientation Ri: Inner Diameter Ro: Outer Diameter

Claims (5)

A blower section having a cylindrical casing having a blower opening that opens forward, and a cross flow fan that rotates around a vertical central axis,
The casing has a rear protruding convex portion located on the downstream side in the rotation direction of the cross flow fan of the blower opening,
A blower in which a gap between the outer periphery of the cross flow fan and the convex portion is set to 0.017 to 0.044 times the outer diameter of the cross flow fan.   The blower according to claim 1, wherein a circumferential dimension of the convex portion in the rotation direction is set to 0.018 to 0.071 times an outer peripheral length of the cross flow fan.   The blower according to claim 1 or 2, wherein a ratio of an outer diameter of the cross flow fan and an inner diameter of the casing is 0.6 to 0.75. The air blowing portion is formed with an air inlet that is located on the downstream side in the rotational direction with respect to the convex portion and located on the upstream side in the rotational direction with respect to the air blowing port,
The blower according to any one of claims 1 to 3, wherein an orientation that the intake port occupies in the rotation direction is 100 ° to 180 °.   The blower according to claim 4, wherein the intake port includes a portion of the front cover that is formed on the downstream side in the rotation direction with respect to the convex portion.

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