JP2019085987A - Blower device - Google Patents

Abstract

To provide a blower device capable of efficiently guiding air blown from the blower device to an intake port of another side device (an unmounted device) in a simple construction.SOLUTION: A blower device 100 includes a casing 110 comprising an upper side casing 111 and a lower side casing 112 joined together in an axial direction (a Y-axis direction) of a centrifugal fan, the casing 110 being fixed to a mount 300, the casing 110 being formed with an exhaust port 102 opened in a direction perpendicular to the axial direction, the exhaust port 102 being constituted by the inside of the casing 110 and the upper face of the mount 300, the mount 300 having straightening fins 121 arranged on the upper face.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blower apparatus, and more particularly to a blower apparatus using a centrifugal fan.

  Blower devices using centrifugal fans are widely used in household appliances, office automation equipment, cooling of industrial equipment, ventilation, air conditioning, air conditioning for vehicles, air blowing, cooling of batteries mounted in hybrid vehicles and electric vehicles, etc. There is. DESCRIPTION OF RELATED ART The blower apparatus using a centrifugal fan is known as a cooling means of the battery mounted in a hybrid vehicle or an electric vehicle (for example, refer patent document 1).

  6 and 7 are schematic views of a battery pack and a blower (blower) described in Patent Document 1, in which the blower 30 is disposed adjacent to the side surface of the battery pack 10. A duct 41 is disposed between the battery pack 10 and the blower 30, and air expelled from the blower 30 is introduced into the battery pack 10 through the duct 41 to cool the battery in the battery pack.

  The duct 41 is wider at the battery pack 10 side. For this reason, in order to expel the air expelled from the blower 30 evenly and efficiently to the duct 41, it is conceivable to provide a rectifying fin at the exhaust port of the blower 30 to rectify the air.

  For example, Patent Document 2 is known as a configuration in which a flow straightening fin is provided at an exhaust port of a blower. FIG. 8 shows a fan described in Patent Document 2. The exhaust port 8 of the casing 2 is provided with a flow straightening plate 29 corresponding to the flow straightening fins substantially vertically along the rotation axis. The flow of air discharged from the impeller by the current plate 29 is rectified and guided to the exhaust port 8.

  In addition, the casing of the blower is generally formed of a resin molded product. As shown in FIG. 9, the exhaust port of the casing is configured to be divided into two, and in many cases, two casings are formed together (see, for example, Patent Document 3).

JP 2014-83882 A JP, 2012-107561, A JP, 2013-213479, A

  However, when the flow straightening plate 29 described in Patent Literature 2 is applied to the blower 30 described in Patent Literature 1, the flow straightening plate 29 extends in the wide direction of the exhaust port and is erected. There is a problem that the air expelled from the mouth is not efficiently guided in the wide direction of the duct 41.

  In this case, in order to efficiently guide the air discharged from the exhaust port of the blower 30 in the wide direction of the duct 41, the straightening vane 29 may be extended and erected in the direction perpendicular to the wide direction. By the way, as disclosed in Patent Document 3, the casing of the blower is generally formed of a resin molded product, and has a structure in which the exhaust port of the casing is divided into two. For this reason, in the structure in which the straightening vanes described above are extended in the direction orthogonal to the wide direction of the duct 41, the two divided casings can not be resin-molded using the upper and lower molds, and the mold structure is The problem of becoming complicated arises.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a blower device capable of efficiently and evenly or intensively guiding air expelled from a blower device to an intake port of a counterpart device (mounted device) with a simple configuration. With the goal.

  The present invention is a blower apparatus incorporating a centrifugal fan inside a casing, wherein the casing is constituted by an upper casing and a lower casing coupled in the axial direction of the centrifugal fan and fixed to a mount. The casing is formed with an exhaust port opened in a direction orthogonal to the axial direction, the inner surface of the exhaust port is constituted by the inside of the casing and the upper surface of the mount, and the upper surface of the mount is rectified It is a blower apparatus with which the fin is arrange | positioned.

  According to the present invention, the straightening fins may be provided one or more on the mount and extend in a direction orthogonal to the axial direction. The aspect of the present invention may include an aspect in which a direction perpendicular to the surface of the straightening fin coincides with the axial direction or a component in the axial direction. In the present invention, the straightening fins may be inclined or curved in a direction parallel to the surface of the mount. As an aspect of the present invention, the upper casing and the lower casing are engaged by a concavo-convex structure, and the engagement by the concavo-convex structure is performed at a portion of the exhaust port facing the upper surface of the mount. Can be mentioned. As this invention, the said mounting base is a aspect which is a part of housing | casing of the apparatus provided with the said blower apparatus.

  According to the present invention, it is possible to obtain a blower apparatus capable of efficiently and evenly or intensively guiding the air discharged from the blower apparatus to the air inlet of the counterpart apparatus (mounted apparatus) with a simple configuration.

It is a figure which shows the form which fixed the blower apparatus of embodiment to the attachment stand. It is a disassembled perspective view of a form shown in FIG. It is sectional drawing of the blower apparatus shown in FIG. FIG. 4 is a perspective view of the impeller assembly shown in FIG. 3; FIG. 5 is an exploded perspective view of the impeller assembly shown in FIG. 4; It is a figure using the conventional blower apparatus (patent document 1). It is a figure which shows the blower apparatus and intake duct which are shown in FIG. 6 (patent document 1). It is a figure which shows other conventional blower apparatuses (patent document 2). It is a figure which shows the other conventional blower apparatus (patent document 3).

(Overview)
The blower apparatus 100 which incorporated the centrifugal fan in the inner side of the casing 110 is shown by FIG. The casing 110 is composed of an upper casing 111 and a lower casing 112 coupled in the axial direction (Y-axis direction) of the centrifugal fan and is fixed to the mount 300, and the casing 110 is orthogonal to the axial direction. An open exhaust port 102 is formed, the exhaust port 102 is constituted by the inside of the casing 110 and the upper surface of the mount 300, and the flow straightening fins 121 are disposed on the upper surface of the mount 300.

  The straightening fins 121 are provided upright on the mount 300 and extend in a direction orthogonal to the axial direction. The flow straightening fins 121 are inclined or curved in a direction parallel to the surface of the mount 300. The upper casing 111 and the lower casing 112 are engaged by the concavo-convex structure in the engagement portion 113, and the engagement by the concavo-convex structure is performed at a portion of the exhaust port 102 facing the upper surface of the mount 300. . The mount 300 may be part of a housing of a device including the blower device 100.

(Constitution)
A blower device 100 is shown in FIG. The blower device 100 is configured of a main body portion 200 and a mount 300. The mounting base 300 may be configured using a part of an opposing member or device to which the blower device 100 is fixed, or may be prepared as an independent part.

  Blower apparatus 100 has an intake port 101 for sucking fluid (in this case, air) and an exhaust port for exhausting air sucked from intake port 101 by the action of an internal centrifugal fan (impeller assembly 500 (see FIGS. 4 and 5)). A mouth 102 is provided. At the exhaust port 102, one or more (three in this example) flow straightening fins 121 are provided upright on the mount 300 and disposed. The flow straightening fins 121 extend in a direction perpendicular to the opening surface of the exhaust port 102 and the upper surface of the mount 300 (the surface on the side where the main body portion 200 is fixed). There are three flow straightening fins 121, and two on both sides thereof are in the width direction of the exhaust port 102 (direction parallel to the upper surface of the mount 300) (Y in the X axis direction). (Curved in the direction of the axis). As a result, the flow of air coming out of the exhaust port 102 is rectified so as to spread in the width direction (the Y-axis positive and negative directions) of the exhaust port 102. The number of rectifying fins is an example and is not limited to the illustrated number. Also, the design is not limited to that illustrated.

  Hereinafter, the main body 200 constituting the blower device 100 will be described. The main body portion 200 has a spiral casing 110 made of resin. The casing 110 includes an upper casing 111 and a lower casing 112 which are formed by resin molding, and the upper casing 111 is formed with an opening which constitutes the intake port 101 in the axial direction. The lower casing 112 is formed with an opening (not visible in FIGS. 1 and 2) to which a motor unit described later is attached. Here, the axial direction (the Y-axis direction in FIGS. 1 and 2) is defined as the extending direction of the rotation shaft of the impeller 320 described later of the blower apparatus 100.

  The upper casing 111 and the lower casing 112 are divided into two in the axial direction at the location of the exhaust port 102, and a recess and a protrusion are respectively formed on the mating surfaces, and the shaft is engaged by engaging the protrusion with the recess. Coupled in the direction. The engagement part 113 of the upper casing 111 and the lower casing 112 which were engaged by said engagement structure is shown by FIGS. FIG. 3 is a cross-sectional view of the main body 200 taken along a plane including the rotation center and parallel to the mount 300.

  Fixing mounting legs 114a and 114b are integrally formed on the upper casing 111, and a fixed mounting leg 114c is integrally formed on the lower casing. Through holes are formed in the fixing attachment legs 114a, 114b and 114c. The main body portion 200 is fixed to the mount 300 by bolts using the through holes and the bolt holes 115 formed in the mount 300.

  Inside the lower casing 112, an impeller assembly 500 shown in FIGS. The impeller assembly 500 is a centrifugal fan and comprises an impeller 320 and a motor assembly 400. In the impeller assembly 500, the motor assembly 400 is driven to rotate the impeller 320, and this rotation discharges the air sucked from the top of the impeller 320 in the centrifugal direction.

  Between the impeller 320 and the casing 110, a flow path through which the air blown out of the impeller 320 is pumped is formed. The flow path has a structure in which the cross-sectional area gradually increases toward the exhaust port 102.

  The inner circumferential surface of the casing 110 has an involute curve along the left turning direction as viewed from the negative direction of the Y-axis in FIG. 1 from the tongue portion formed in the portion adjacent to the exhaust port 102. The above-described flow path is formed between the inner peripheral surface of the casing 110 and the impeller 320. As the impeller 320 rotates, air is drawn into the impeller 320 from the air inlet 101 and is blown out around the impeller 320 (the above-described flow path). The air blown out from the impeller 320 is pressure-fed through the above-mentioned flow path according to the rotation of the impeller 320, reaches the exhaust port 102, and is exhausted from the exhaust port 102.

  Hereinafter, the impeller assembly 500 will be described with reference to FIGS. The impeller assembly 500 has a structure in which a motor assembly 400 and an impeller 320 are coupled. The impeller 320 is an integrally molded product made of resin, and is configured of a hub 321, a vane 323 serving as a forward facing vane, and a connecting portion 322 connecting the edges of the vane 323. The hub 321 is fixed to a shaft (drive shaft) 431 of the motor assembly 400 by a lock washer 324. As shaft 431 of motor assembly 400 rotates, impeller 320 rotates.

  Motor assembly 400 constitutes an inner rotor type motor in which a rotor rotates inside a stator. The motor assembly 400 includes a resin motor housing 403, a metal bracket 410, a stator 420, a rotor 430, and a circuit board 402.

  The stator 420 has a substantially annular shape, and includes a stator core 421, an insulator 422, and a coil 423. The stator core 421 is configured by laminating a predetermined number of soft magnetic cores, and includes a plurality of salient poles extending radially inward. In the stator core 421, resin insulators 422 are attached from both axial sides, and a coil 423 is wound around the salient pole extending radially inward via the insulator 422.

  The stator 420 is fixed to a metal bracket 410. The bracket 410 includes a cylindrical portion 411 and a flange portion 412. The flange portion 412 has a shape extending radially outward from one end of the cylindrical portion 411. The stator 420 is fixed to the inside of the cylindrical portion 411. The bracket 410 to which the stator 420 is fixed is mounted on a resin motor housing 403.

  The rotor 430 is rotatably disposed inside the stator 420. The rotor 430 includes a metal shaft 431, a metal sleeve 432, and a hollow cylindrical magnet (rotor magnet) 433. The sleeve 432 has a cylindrical portion and a disc portion, the magnet 433 is fixed to the outer periphery of the cylindrical portion, and the shaft 431 is fixed to the center of the disc portion (see FIG. 3). The shaft 431 is rotatably held by the motor housing 403 via bearings 404 and 405 (see FIG. 3).

  A circuit board 402 is disposed on the back of the bracket 410. The circuit board 402 is attached to the motor housing 403 with a screw or the like. The motor housing 403 is fixed to the lower casing 1112 and mounting of the impeller assembly 500 to the casing 110 is performed. In addition, after the mounting of the impeller assembly 500 on the casing 110 is performed, the cover 406 is mounted behind the impeller assembly 500 (motor assembly). The cover 406 is fixed to the lower casing 112 by screws (see FIG. 3).

  In this structure, after the impeller 320 is attached to the tip of the shaft 431, the impeller assembly 500 (motor assembly 400) is inserted from the inside of the lower casing 112 into the opening formed in the lower casing 112, The impeller assembly 500 (motor assembly 400) is mounted on the lower casing 112. At this time, since the impeller assembly 500 can be attached to the lower casing 112 with the impeller 320 attached to the motor assembly 400, the dynamic balance of the impeller 320 is adjusted with the impeller 320 attached to the motor assembly 400. be able to. As a result, the impeller 320 in which the vibration is suppressed can be incorporated into the casing 110.

(Superiority)
As shown in FIG. 1, the upper casing 111 and the lower casing 112 are divided into two at the location of the exhaust port 102, a recess and a protrusion are respectively formed on the mating surfaces, and the protrusion is engaged with the recess Thus, the casing 110 is configured to be coupled at the engagement portion 113.

  In this structure, it is difficult to provide the same as the straightening fins 121 integrally with the upper casing 111 and the lower casing 112. This is because, in the above-described structure of the casing 110, it is necessary to separate the injection mold and the injection-molded molded article (upper casing 111 and lower casing 112) in the axial direction (Y-axis direction in FIG. 1) This is because at this separation, the flow straightening fins 121 extending in the direction orthogonal to the separation direction (Y-axis direction) become an obstacle. If a separate mold is used as a mold, this problem can be dealt with, but the number of parts of the mold increases and the process becomes complicated, resulting in high cost. (There is a problem with that).

  In the present embodiment, a wall surface of the lower side of the exhaust port 102 of the casing 110 is cut, and the flow straightening fins 121 are provided on the mount 300 on which the blower device 100 is attached and fixed. It functions as the lower wall of the mouth 102. That is, in the vicinity of the exhaust port 102, a flow path is formed by the inner circumferential surface of the casing 110 and the upper surface of the mounting base 300. In this portion, the lower surface of the casing 110 (the upper casing 111 and the lower casing 112) has a cutout structure, and the cutout portion is closed by the mount 300 from the lower surface. The nearby chassis is configured. The straightening fins 121 extending in the exhaust direction (the positive direction of the X-axis) of the exhaust port 102 are disposed on the mount 300.

  In this structure, since the flow straightening fins 121 are disposed on the mount 300, no difficulty occurs in removing the molded product from the above-described mold. In addition, the direction and shape of the rectifying fins can be freely set. For example, it is possible to easily obtain a straightening fin having a structure for straightening the exhaust flow in the axial direction (Y-axis direction) of the blower device 100.

  That is, in order to perform rectification to widen the exhaust flow in the axial direction (Y-axis direction) of the blower device 100, the flow straightening fin 121 is perpendicular to at least a part of the surface (the surface of the thin plate-like flow straightening fin 121). It is necessary that the direction matches the axial direction of the blower device 100 (the extending direction of the shaft 431) (or the structure having a component of that direction) (in the example of the flow straightening fins 431 I'm facing you).

  In the present embodiment, the straightening fins 121 are erected on the mount 300 having a surface extending in the coupling direction (Y-axis direction) of the upper casing 111 and the lower casing 112, so that the surface of the straightening fins 121 (or A state in which a direction perpendicular to at least a part thereof coincides with the axial direction of the blower device 100 (the axial direction of the rotation axis of the impeller 320) (or a state having a component in that direction) can be realized without increasing cost. A structure for rectifying the exhaust flow in the axial direction (Y-axis direction) of the blower device 100 can be easily obtained. In addition, when the mounting base 300 is made of resin, the flow straightening fins 121 can be obtained by integral molding as a part of the mounting base 300, and cost can be further reduced.

  As a variation of the shape of the flow straightening fins 121, a structure in which the cross-sectional shape of the flow straightening fins 121 is loosely curved like the cross sectional shape of the wing of an aircraft, based on the design shown in FIGS. Examples include a structure having a curved shape in the Y-axis direction, and a shape extending in a direction having an angle with the X-axis direction (a direction oblique to the X-axis direction).

  As described above, in the present embodiment, the exhaust flow is expanded in the axial direction (Y-axis direction) of the blower device 100 as a design of the flow straightening fins 121 by erecting a plurality of flow straightening fins on the mount 300. The structure is easily obtained.

  Further, in the present embodiment, since the engagement (engagement at the engagement portion 113) using the engagement of the concavo-convex structure is performed only on the upper side of the exhaust port 102, the height dimension of the exhaust port 102 is secured with a limited size. There is an advantage that can be done. For example, consider a structure in which the engagement using the concavo-convex structure of the upper casing 111 and the lower casing 112 is performed on both the upper side and the lower side of the exhaust port. In this case, in the case of producing a recess by resin molding, the thickness of the recess is required in order to prevent the short molding of the resin, but it is necessary in two places of the upper side and the lower side. For this reason, a structure similar to that of the engaging portion 113 is required at two positions above and below the opening of the exhaust port 102, and the height dimension of the exhaust port is sacrificed accordingly. In this structure, the height dimension of the exhaust port may not match the height dimension of the inlet port of the counterpart device (device to be mounted).

  On the other hand, in the present embodiment, the lower wall surface portion of the exhaust port 102 is cut, and a part of the mounting table 300 to which the blower device 100 is attached and fixed functions as the lower wall surface of the exhaust port 102 Therefore, the engaging portion using the concavo-convex structure is not required on the lower side, and accordingly, the height dimension of the opening of the exhaust port 102 can be secured. For this reason, it becomes easy to match the height dimension of the exhaust port 102 of the blower apparatus 100 and the height dimension of the inlet port of the counterpart apparatus (device to be mounted).

(Others)
The tip of the wall surface on the inner lower side of the casing 110 constituting the inner side of the exhaust port 102 is in close contact with the mount 300 and is a flow path of air, so a tapered shape in which the cross-sectional area of the flow path is gradually expanded It is preferable to form.

  In the present embodiment, the flow straightening fins 121 are formed on the mounting base 300, but it is a matter of course that the flow straightening fins may be formed on the air intake port of the counterpart device (mounted device).

  DESCRIPTION OF SYMBOLS 100 ... Blower apparatus, 101 ... Intake port, 102 ... Exhaust port, 110 ... Casing, 111 ... Upper casing, 112 ... Lower casing, 113 ... Engagement part, 114a ... Mounting leg for fixation, 114b ... Mounting leg for fixation, 114c: mounting foot for fixing, 115: screw hole, 121: straightening fin, 200: main body, 300: mounting base, 320: impeller, 321: hub, 322: connecting portion, 323: vane, 324: locking washer, 402 ... circuit board, 403 ... motor housing, 404 ... bearing, 405 ... bearing, 406 ... cover, 410 ... bracket, 411 ... cylindrical portion, 412 ... flange portion, 420 ... stator, 421 ... stator core, 422 ... insulator, 423 ... coil , 430 ... rotor, 431 ... shout, 432 ... sleeve, 433 ... magnet, 500 ... i Perak assembly.

Claims (6)

A blower apparatus incorporating a centrifugal fan inside a casing,
The casing is constituted by an upper casing and a lower casing coupled in the axial direction of the centrifugal fan and fixed to a mount.
The casing is formed with an exhaust port opened in a direction orthogonal to the axial direction,
The inner surface of the exhaust port is constituted by the inner side of the casing and the upper surface of the mount;
The blower apparatus by which the rectification | straightening fin is arrange | positioned on the upper surface of the said mounting stand.   The blower apparatus according to claim 1, wherein one or more of the flow straightening fins are erected on the mount and extend in a direction orthogonal to the axial direction.   The blower apparatus according to claim 1, wherein a direction perpendicular to a surface of the straightening fin has the axial direction or a component in the axial direction.   The blower apparatus according to any one of claims 1 to 3, wherein the flow straightening fins are inclined or curved in a direction parallel to the surface of the mount. The upper casing and the lower casing are engaged by a concavo-convex structure,
The blower device according to any one of claims 1 to 4, wherein the engagement by the concavo-convex structure is performed at a portion of the exhaust port facing the upper surface of the mount.   The blower apparatus according to any one of claims 1 to 5, wherein the mount is a part of a housing of an apparatus including the blower apparatus.

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