JP5897515B2 - Blower - Google Patents

Description

  The present invention relates to a blower.

  A blower is known in which a fan and a motor are attached to a case, and the motor rotates the fan to suck air from the intake port of the case and discharge the air from the exhaust port. For example, Patent Documents 1 and 2 disclose techniques related to such a blower.

JP 2009-91962 A JP 2011-185113 A

  Such a motor may be attached to a case after being manufactured so that it can be driven alone as a unit. Since the motor unit functions as a motor by itself, the motor unit includes a support plate that supports the stator. For example, when fixing a motor unit to a case, it is possible to fix the support plate of a motor unit so that it may overlap with the low wall part of a case in an axial direction. In this case, the axial thickness of the blower may increase.

  Then, an object of this invention is to provide the air blower thinned.

  The object includes a fan, a motor for rotating the fan, and a first and second openings through which air flows by rotation of the fan, and the motor and fan are housed and formed in a scroll shape. A partition member fixed to the case and surrounding the motor to partition the motor and the fan, and the case includes an upper case and a lower case fixed to the upper case, The upper case includes the first opening located on the upper side in the axial direction of the fan, the lower case includes a low wall portion located on the lower side in the axial direction, and the motor and the partition member are It can be achieved by a blower device fixed inside the low wall portion.

  According to the present invention, a thinned air blower can be provided.

FIG. 1 is an external view of the air blower of the present embodiment. FIG. 2 is an external view of the blower of the present embodiment. FIG. 3 is an external view of the air blower of the present embodiment. FIG. 4 is a cross-sectional view of the blower device of the present embodiment.

  1-3 is an external view of the air blower A of a present Example. The blower A includes an upper case 10, a lower case 20, a fan 80, and the like. The upper case 10 and the lower case 20 are assembled and fixed to each other from the axial direction of the fan 80. The upper case 10 and the lower case 20 cooperate to define a single scroll-like case. The upper case 10 and the lower case 20 are made of synthetic resin. The upper case 10 includes a peripheral wall portion 12, an upper wall portion 14, and a protruding wall portion 18. The peripheral wall portion 12 surrounds the outer peripheral portion of the fan 80 and has a substantially cylindrical shape. The peripheral wall portion 12 is an example of an upper case side peripheral wall portion. The upper wall portion 14 is continuous with the peripheral wall portion 12 and is located on the upper side in the axial direction from the fan 80. The upper wall portion 14 is positioned on the upper side in the axial direction of the fan 80. The axial direction means the direction of the central axis of rotation of the fan 80. The upper wall portion 14 is formed with an opening 15a through which air passes by the rotation of the fan 80. The upper part of the fan 80 is exposed from the opening 15a. The protruding wall portion 18 partially extends radially outward from the peripheral wall portion 12 and the upper wall portion 14.

  The lower case 20 includes a peripheral wall portion 22, a bottom wall portion 24, and a protruding wall portion 28. The peripheral wall portion 22 surrounds the outer peripheral portion of the fan 80 and has a substantially cylindrical shape. The peripheral wall portion 22 is an example of a lower case side peripheral wall portion. The peripheral wall portions 12 and 22 are fixed to each other. The bottom wall portion 24 is continuous with the peripheral wall portion 22 and is located on the lower side in the axial direction than the fan 80. Unlike the upper wall portion 14, no opening is formed in the bottom wall portion 24. A plurality of terminal pins LD that are electrically connected to a motor M, which will be described later, protrude from the bottom wall portion 24. The plurality of terminal pins LD are connected to the cable CB. Although described in detail later, the bottom wall portion 24 supports a fan 80 and a motor M that rotates the fan 80. That is, the fan 80 and the motor M are housed in the upper case 10 and the lower case 20. The protruding wall portion 28 partially extends radially outward from the peripheral wall portion 22 and the bottom wall portion 24. The protruding wall portions 18 and 28 are fixed to each other. As shown in FIG. 2, cutout portions 19 and 29 are formed in the protruding wall portions 18 and 28, respectively. The notches 19, 29 define a single opening 15b.

  As the fan 80 rotates, air is sucked from one of the openings 15a and 15b, and the air flows around the upper case 10 and the lower case 20 and is discharged from the other of the openings 15a and 15b. Thus, air passes through the openings 15a and 15b as the fan 80 rotates.

  The blower A is used, for example, to cool a battery mounted on a hybrid vehicle. This battery is used to store the power generated by the generator driven by the engine of the hybrid vehicle. In addition, the air blower A is not limited to such a use. Moreover, although the fan 80 rotates, air is suck | inhaled from the opening part 15a and air is discharged | emitted from the opening part 15b, However, It is not limited to this. You may use so that air may be attracted | sucked from the opening part 15b and discharged | emitted from the opening part 15a.

  FIG. 4 is a cross-sectional view of the blower A of this embodiment. The fan 80 includes a front end portion 82, a dome portion 84, a flange portion 86, a blade portion 88, and a ring portion 89. The fan 80 is made of a synthetic resin. The tip portion 82 is fixed to the tip portion of the rotating shaft 42 described later. The dome portion 84 extends radially outward from the distal end portion 82 and extends downward as it extends radially outward. The dome portion 84 has a streamline shape so as to reduce air resistance. This is because the air sucked from the opening 15 a is smoothly guided to the outside in the radial direction of the fan 80.

  The flange portion 86 extends radially outward from the lower end portion of the dome portion 84. The flange portion 86 is slightly inclined downward in the axial direction as it extends radially outward. The blade portion 88 is formed so as to extend from the outer peripheral end portion of the flange portion 86 in a substantially cylindrical shape, and includes a plurality of blades. A plurality of blades are provided in a circular shape at predetermined intervals so that air passes between adjacent blades. The vanes extend in the axial direction. The peripheral wall portion 12 of the upper case 10 and the peripheral wall portion 22 of the lower case 20 are located on the outer periphery of the blade portion 88. The ring portion 89 is provided on the upper side of the blade portion 88 and is connected to the upper end portion of each blade. When the fan 80 rotates, the air is introduced into the upper case 10 and the lower case 20 through the blade portion 88 through the opening 15a, and the air flows along the inside of the peripheral wall portions 12 and 22, and the opening is opened. It is discharged from the part 15b.

  The motor M will be described. The motor M includes a coil 30, a rotor 40, a stator 50, a bearing housing 60, a printed circuit board PB, and the like. The stator 50 is made of metal. The stator 50 is fixed to the bearing housing 60. The bearing housing 60 is fixed to the inside of the bottom wall portion 24 of the lower case 20. The bearing housing 60 includes a cylindrical portion 62 and a flange portion 64. The cylindrical portion 62 is formed around the rotation shaft 42. Bearings B <b> 1 and B <b> 2 that hold the rotating shaft 42 rotatably are held in the cylindrical portion 62. The flange portion 64 extends radially outward from the lower end portion of the cylindrical portion 62. The flange portion 64 is fixed to the inside of the bottom wall portion 24 by a plurality of screws S1. The cylindrical portion 62 is held so as to penetrate the stator 50.

  A plurality of coils 30 are wound around the stator 50. The coil 30 is electrically connected to the printed circuit board PB. The printed circuit board PB is obtained by forming a conductive pattern on a rigid insulating substrate. The printed circuit board PB is supported and fixed by a plurality of pin boss portions P extending axially upward from the inside of the bottom wall portion 24 of the lower case 20. A plurality of terminal members T for supplying power to the coil 30 and other electronic components are mounted on the printed circuit board PB. The terminal member T is formed by bending a thin metal plate. The electronic component is, for example, an output transistor (switching element) such as an FET or a capacitor for controlling the energization state of the coil 30. Further, the electronic component may be a magnetic sensor whose output changes with the rotation of the rotor 40, for example. A plurality of terminal pins LD are electrically connected to the printed circuit board PB. When the coil 30 is energized, the stator 50 is excited.

  The rotor 40 has a rotating shaft 42, a yoke 44, and one or more permanent magnets 46. The rotating shaft 42 is rotatably supported by bearings B1 and B2. A yoke 44 is fixed to the rotation shaft 42, and the yoke 44 rotates together with the rotation shaft 42. The yoke 44 is substantially cylindrical and is made of metal. One or more permanent magnets 46 are fixed to the inner peripheral side surface of the yoke 44. The permanent magnet 46 is opposed to the outer peripheral surface of the stator 50. When the coil 30 is energized, the stator 50 is excited. Therefore, a magnetic attractive force and a repulsive force act between the permanent magnet 46 and the stator 50. The rotor 40 rotates with respect to the stator 50 by the action of this magnetic force. Thus, the motor M is an outer rotor type motor in which the rotor 40 rotates. When the rotor 40, that is, the rotating shaft 42 rotates, the fan 80 rotates with the rotating shaft 42.

  A partition member 70 that partitions the fan 80 and the motor M and surrounds the motor M is provided. The partition member 70 is made of a synthetic resin. The partition member 70 includes a distal end portion 72, a dome portion 74, and a flange portion 76. The distal end portion 72 protrudes upward in the axial direction, and a hole 72a for allowing the rotation shaft 42 to escape is formed. An oil seal C that is fitted to the rotary shaft 42 is press-fitted and fixed inside the distal end portion 72. The oil seal C prevents intrusion of dust or water mixed from the hole 72a. The dome portion 74 extends radially outward from the distal end portion 72 and extends downward in the axial direction. The flange portion 76 extends radially outward from the lower end side of the dome portion 74. The flange portion 76 is fixed to the inside of the bottom wall portion 24 of the lower case 20 with a screw S2.

  In the partition member 70, a motor M, a printed board PB, and a terminal member T are also housed. Since the partition member 70 surrounds these parts, dustproofness and waterproofness are improved. Moreover, since the partition member 70 seals the motor M and is not provided with a hole or the like, the dustproof property and the waterproof property are further improved.

  An O-ring R sandwiched between the flange portion 76 and the bottom wall portion 24 is disposed. Specifically, a ring-shaped groove G centered on the rotation shaft 42 is formed on the surface of the bottom wall portion 24 that contacts the flange portion 76. An O-ring R is disposed in the groove G. The O-ring R is made of rubber having elasticity. By fixing the flange portion 76 to the bottom wall portion 24 with the screw S <b> 2, the O-ring R is crushed by the flange portion 76. Thereby, even if a gap is generated between the flange portion 76 and the bottom wall portion 24, the gap is closed by the flange portion 76.

  In this embodiment, the bearing housing 60 of the motor M is fixed to the bottom wall portion 24 of the lower case 20 that defines the case. That is, the stator of the motor M is fixed to the bottom wall portion 24 of the lower case 20. Accordingly, the motor M is fixed to the bottom wall portion 24 of the lower case 20 while defining a case in which air flows.

  For example, the case where the low wall part of a lower case and the support plate which supports a motor are separate bodies is assumed. In this case, it is conceivable to fix the motor unit including the support plate to the lower case after the motor is manufactured as a single unit. In this case, for example, when the lower wall portion of the lower case and the support plate are fixed so as to overlap in the axial direction, the thickness of the entire apparatus in the axial direction may increase. Moreover, since the low wall part of a lower case and the support plate of a motor unit are separate bodies, the number of parts of the whole air blower increases, and cost increases. In addition, depending on the method of fixing the lower wall portion of the lower case and the support plate of the motor unit, the low wall portion and the support plate may rattle due to vibration of the motor unit or the like, and vibration noise may occur. In addition, since the support plate that supports the motor's rotation shaft and the lower wall of the lower case are separate, the position accuracy of the rotation shaft relative to the lower case depends on the molding accuracy and assembly accuracy of the support plate and lower case. As a result, the positional accuracy of the fan fixed to the rotating shaft with respect to the lower case may be lowered. Thereby, there is a possibility that desired wind power cannot be secured.

  In the present embodiment, the bottom wall portion 24 of the lower case 20 has a function of a support plate that defines a flow path through which air flows and supports the motor M. For this reason, it is made thin in the axial direction, the number of parts is reduced, and vibration noise is also suppressed. Further, the positional accuracy of the fan 80 with respect to the lower case 20 can be ensured.

  Further, since the motor M is an outer rotor type motor, the output is improved as compared with an inner rotor type motor of the same size. However, an inner rotor type motor may be used when output is not so necessary or when there is sufficient space.

  In the present embodiment, a single scroll-like case is defined by two upper cases 10 and a lower case 20. The upper case 10 and the lower case 20 include peripheral wall portions 12 and 22 fixed to each other. The peripheral wall portions 12 and 22 have a cylindrical shape located on the radially outer side of the fan 80. That is, in this embodiment, a single case is defined by the upper case 10 and the lower case 20 each having a semi-case shape.

  For example, as in Patent Documents 1 and 2, it is conceivable to define a case by fixing a plate-like member like a lid to a scroll-like main body case. However, in this way, when the case is defined by two members, if one is a plate-like member, it is difficult to ensure the strength of the plate-like member, and if an external force acts on the plate-like member, the case is bent. There is a risk. That is, when an external force is applied to the plate-shaped member, only the plate-shaped member may be deformed without deforming the main body case. For this reason, there is a possibility that the installation location in which the force may act on the plate-like member cannot be performed, and the installation location and installation method of the blower device may be limited.

  In the case of the present embodiment, the upper case 10 and the lower case 20 include peripheral wall portions 12 and 22, respectively. The upper case 10 and the lower case 20 are both semi-cased and not plate-like members. For example, when an axially lower force is applied to the upper wall portion 14 of the upper case 10, the upper wall portion 14 is continuous with the peripheral wall portion 12, so that not only the upper wall portion 14 but also the peripheral wall portion 12. The power is distributed. Therefore, deformation of the upper wall portion 14 is suppressed. The same applies to the lower case 20. Thus, the strength of each of the upper case 10 and the lower case 20 is ensured.

  For this reason, the installation location and the installation method of the air blower A of the present embodiment are not limited. For example, the blower A may be installed with the upper case 10 on the lower side. Further, other devices and members may be arranged on the upper case 10 with the lower case 20 facing down.

  In the case of the present embodiment, the motor M is fixed to the lower case 20 in which the strength is ensured in this way. For this reason, the rotation shaft 42 is prevented from being inclined due to the deformation of the lower case 20.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and modifications and changes can be made within the scope of the gist of the present invention described in the claims. Is possible.

  A hole may be provided in the dome portion 84 of the fan 80. Thereby, the partition member 70 is exposed to the wind, and the heat radiation of the motor M is promoted.

A blower M motor LD terminal pin 10 upper case 12 peripheral wall 14 upper wall 15a, 15b opening 18, 28 protruding wall 19, 29 notch 20 lower case 22 peripheral wall 24 low wall 30 coil 40 rotor 42 rotation Shaft 46 Permanent magnet 50 Stator 60 Bearing housing 70 Partition member 80 Fan

Claims (6)

With fans,
A motor for rotating the fan;
A case that includes first and second openings through which air flows by rotation of the fan, houses the motor and fan, and is formed in a scroll shape;
Fixed to said case, and a partition member for partitioning between the fan and the motor surrounding the motor,
The case includes an upper case, a lower case fixed to the upper case,
The upper case includes the first opening located on the upper side in the axial direction of the fan,
The lower case includes a low wall portion located on the lower side in the axial direction,
The motor and the partition member are fixed inside the low wall portion ,
The motor includes a coil, a rotor, and a stator,
The rotor includes a yoke, a permanent magnet fixed to the yoke,
The air blower , wherein the partition member surrounds the coil, the yoke, the permanent magnet, and the stator . The blower according to claim 1 , wherein the partition member seals the motor.   The air blower according to claim 1, further comprising a printed circuit board electrically connected to the motor and fixed to the lower case.   The blower according to claim 3, wherein the printed circuit board is surrounded by the partition member.   The blower according to any one of claims 1 to 4, wherein the motor is an outer rotor type motor.   The air blower according to any one of claims 1 to 5, which is used to cool a battery mounted on a hybrid vehicle.

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