JP2010059847A - Blower unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively cool a drive motor, reduce suction resistance and avoid shortage of air flow and increase of noise by securing large draft air duct formed in a scroll case even when a blower unit is stored in a limited storage space. <P>SOLUTION: A motor body part 30 of the drive motor 3 is projected to an inside of the scroll case 2, and a multiblade fan 4 installed on a rotary shaft 11 of the drive motor 3 is formed equal to or smaller than a diameter of the motor body part 30, and is arranged adjacently in the front and rear in an axial direction with respect to the motor body part 30. Consequently, the draft air duct 32 delivering air is defined by a side surface of a section projecting to the inside of the scroll case of the motor body part 30, an outer circumference of the multiblade fan 4, and an inner surface of the scroll case 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a blower unit particularly suitable for battery cooling.

A conventional blower unit mounted on a vehicle or the like often uses a configuration in which a centrifugal multi-blade fan housed in a scroll case is rotated by a drive motor (see Patent Documents 1, 2, 3, etc.).
As shown in FIG. 5, this is attached to the multi-blade fan 100 that blows air sucked from the axial direction outward, the scroll case 110 that houses the multi-blade fan, and the scroll case 110. The multi-blade fan 100 is configured to have a drive motor 120 that rotates the multi-blade fan 100, and the multi-blade fan 100 includes a boss portion 101 that is fixed to a rotating shaft 121 of the drive motor 120, and the boss portion 101. , And a plurality of blades 103 provided along the circumferential direction of the outer peripheral edge of the cone portion 102 and scrolled. A portion facing the opening 111 formed in the case 110 is formed in the suction port 104 for sucking air.

  Further, the drive motor 120 is generated by a motor main body 122 in which a control board is accommodated, a stator (not shown) protruding from the motor main body 122, and a rotating magnetic field generated in the stator so as to cover the stator. The rotating rotor 123 and a rotating shaft 121 to which the rotor 123 is fixed are configured.

  A flange portion 124 provided at the upper portion of the motor main body 122 is fixed to the scroll case 110 so that the rotor 123 protrudes into the scroll case 110, and the rotor 123 protruding into the scroll case is attached to the multiblade fan 100. It is adapted to be accommodated in the inner space of the cone part 102.

Accordingly, a scroll-shaped air passage 130 is defined in the scroll case 110 by the outer periphery of the multi-blade fan 100 and the inner surface of the scroll case 110, and when the multi-blade fan 100 is rotated by the drive motor 120, the suction port 104 is opened. Then, air is sucked from the axial direction, and the sucked air flows along the cone portion 102 and flows between the blades 103, and is then pumped to the surrounding air passage 130.
Japanese Patent Laid-Open No. 10-225059 Japanese Patent Laid-Open No. 11-37096 Japanese Patent Laid-Open No. 2004-68741

  However, in the above-described configuration, the motor main body 122 that accommodates the control board of the drive motor and the like is attached to protrude below the scroll case 110, and the rotor 123 is provided to protrude into the scroll case. Since 123 is accommodated in the inner space of the cone portion 102 of the multiblade fan 100, the drive motor 120 is difficult to cool without contacting the main flow of air flowing through the air passage 130. For this reason, conventionally, as disclosed in Patent Document 1, a heat sink is provided at a place where heat is easily generated, and the heat sink is exposed to the air passage 130. In particular, in a brushless motor, electronic components provided on a control board that controls energization tend to generate heat.

  In addition, since the motor main body 122 of the drive motor 120 is attached to the lower portion of the scroll case 110, a dead space is formed around the motor main body 122 of the blower unit, and the axial dimension of the blower unit ( When H) cannot be secured sufficiently, the cross-sectional area of the air passage cannot be secured sufficiently large. For this reason, the suction resistance is increased (the passage pressure loss is worsened), resulting in problems such as insufficient air volume and increased noise.

  The present invention has been made in view of such circumstances, and can be actively cooled in the drive motor, and is formed in the scroll case even when the blower unit is housed in a limited housing space. The main problem is to provide a blower unit that can secure a large air flow path, thereby reducing suction resistance and avoiding a shortage of air volume and an increase in noise.

  In order to achieve the above object, a blower unit according to the present invention is provided with a multiblade fan that blows air sucked from an axial direction outward, a scroll case that houses the multiblade fan, and the scroll case. And a drive motor for rotating the multi-blade fan, wherein the multi-blade fan mounted on the rotary shaft of the drive motor is provided with a motor body portion of the drive motor protruding into the scroll case. The motor body is formed to have a diameter substantially equal to or smaller than the diameter of the motor body, and is arranged side by side in the axial direction on the motor body, and the side surface of the portion protruding into the scroll case of the motor body is It is characterized in that a blower passage for discharging air is defined together with the outer periphery of the multi-blade fan and the inner surface of the scroll case.

  Therefore, the motor main body is projected in the scroll case, and the multi-blade fan is arranged in parallel in the axial direction without covering the periphery of the drive motor, and the side surface of the portion protruding into the scroll case of the motor main body, Since the outer periphery of the multi-blade fan and the inner surface of the scroll case define a scroll-like air passage that sends out air, the air flowing through the air passage is in direct contact with the side surface of the motor body. It becomes possible to cool by the air which flows through a ventilation path.

  Even if sufficient space in the axial direction of the drive motor cannot be secured, the passage section of the air passage can be enlarged by reducing the portion protruding from the scroll case of the drive motor and increasing the axial dimension of the scroll case. It can be secured.

  Here, in order to promote cooling of the motor main body, the motor main body protruding into the scroll case preferably has a housing made of metal.

  In particular, the air blowing unit described above can promote cooling of the drive motor while ensuring a large area of the air passage in a given accommodation space, so that a location where air with relatively high temperature is sucked and discharged, for example, battery cooling This configuration is also suitable when it is disposed downstream of the battery.

  In addition, when using a ventilation unit for battery cooling, since gas, such as hydrogen, may be mixed in the air heat-exchanged with the battery, it is preferable to use a brushless motor especially as a drive motor. .

  Further, in a configuration in which the motor main body includes at least a control board that controls the current supplied to the stator, the rotor, and the armature winding, the control board that requires cooling is provided with the multiblade rather than the stator and the rotor. It is preferable to arrange on the fan side.

  Further, in order to promote the cooling of the motor main body protruding into the scroll case, the outer peripheral edge of the portion facing the motor main body of the multi-blade fan is the outer peripheral edge of the portion facing the multi-blade fan of the motor main body. It may be formed in a shape that conforms to the shape of the portion to facilitate introduction of suction air into the side surface of the motor body.

  Furthermore, in order to promote the cooling of the motor main body protruding into the scroll case, heat radiating fins may be provided on the outer surface of the motor main body.

  The relationship between the multi-blade fan and the blower described above is more specifically, a multi-blade fan is a boss portion fixed to the rotating shaft of the drive motor, a cone portion connected from the boss portion, And a plurality of blades provided along the circumferential direction of the outer peripheral edge of the cone portion and standing in the axial direction of the rotating shaft, and air sucked from the axial direction along the cone portion When it is the structure which guides to a blade | wing and passes between a blade | wing and a blade | wing, it becomes a structure which the motor main-body part does not protrude and is arrange | positioned inside the said cone part. By adopting a configuration in which the motor main body does not protrude from the inside of the cone in this way, there is no inconvenience that the air flowing through the air passage is blocked by the cone and does not hit the side surface of the motor main body.

  As described above, according to the present invention, the motor body portion of the drive motor is protruded inside the scroll case, and the diameter of the multiblade fan mounted on the rotation shaft of the drive motor is set as the diameter of the motor body portion. The motor body and the multi-blade fan are arranged side by side in the axial direction, and the side surface of the portion of the motor body that protrudes into the scroll case is formed. Since the air passage for pumping air is defined by the outer periphery of the multiblade fan and the inner surface of the scroll case, the motor main body can be directly cooled by the air flowing through the air passage.

  In addition, since it is possible to form the dead space formed around the motor body as a ventilation path, a large passage cross section of the ventilation path is ensured even if the axial dimension of the blower unit is limited. Therefore, it becomes possible to avoid a shortage of air volume due to an increase in suction resistance, and it is possible to avoid deterioration of noise.

  In particular, in the above-described configuration, if the housing of the motor main body is made of metal, the heat dissipation effect can be enhanced by increasing the heat conduction of the motor main body.

  Furthermore, the air blowing unit described above is a particularly useful configuration when the battery must be disposed downstream of the battery in order to cool the battery. That is, when the blower unit is arranged on the downstream side of the battery, air warmed by the battery is sucked. Therefore, with the conventional configuration, it is expected that the drive motor is cooled using warm air. In this configuration, even if warm air is sucked, the side of the motor body part is part of the air flow path and is exposed to the air flow path, so the temperature of the suction air is high However, it is possible to expect a cooling effect.

  By using a brushless motor as the drive motor, there is no danger when the gas discharged from the battery is sucked and discharged even when used for battery cooling.

  In addition, by arranging the control board housed in the motor body on the side of the multi-blade fan rather than the stator or rotor, it is possible to place the control board that tends to generate heat in the part protruding into the scroll case of the motor body. It becomes possible to enhance the cooling effect of the control board.

  Furthermore, by forming the outer peripheral edge portion of the portion facing the motor main body portion of the multi-blade fan into a shape along the shape of the outer peripheral edge portion of the portion facing the multi-blade fan of the motor main body portion, from the multi-blade fan It is possible to effectively guide the air flowing in the radially outward direction to the periphery of the motor main body, and it is possible to improve the cooling performance of the drive motor.

  Furthermore, it is possible to enhance the heat dissipation effect of the motor body by providing the heat radiation fins on the outer surface of the motor body.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the accompanying drawings.

  In FIG. 1, a blower unit 1 is arranged, for example, on the downstream side of a battery to cool a battery (not shown), and is used for sucking and discharging air warmed by the battery. The drive motor 3 and the multiblade fan 4 are provided.

The scroll case 2 is made of resin or the like, and an upper side wall 7 having an opening 6 in which the bell mouth 5 is provided integrally or separately from the upper side wall is disposed opposite to the upper side wall at a predetermined interval, and a drive motor is attached. It has a lower side wall 9 in which a motor insertion hole 8 is formed, and an outer peripheral wall 10 provided so as to leave the discharge port 20 so as to connect the outer peripheral edges of the upper side wall 7 and the lower side wall 9.
The outer peripheral wall 10 is formed in a spiral shape from the winding start portion 10a as a starting point so that the distance from the center of the multi-blade fan 4 gradually increases along the circumferential direction of the sirocco fan.

  The multiblade fan 4 is known per se, and includes a boss portion 12 fixed to the rotating shaft 11 of the drive motor 3, a cone portion 13 connected to the boss portion 12, and an axial direction of the rotating shaft 11. And a plurality of blades 14 provided along the circumferential direction of the outer peripheral edge of the cone portion 13, and a suction port 15 defined by a plurality of blades facing the cone portion 13. The air that has flowed in is guided to the blade 14 along the cone portion 13 and passes between the blades.

  The drive motor 3 is an outer rotor type brushless motor also shown in FIG. 2, and a rotating shaft 11 that rotates integrally with the rotor 21 is located at the center of a housing 30 a constituting the motor main body 30 via bearings 23 and 24. A stator 26 that is supported by a shaft and wound around an armature winding 25 is provided around the rotating shaft 11, and a magnet 27 attached to the rotor 21 is disposed on the outer side of the stator 26 so as to face the stator 26. The rotating shaft 11 is rotated by rotating the rotor 21 with the rotating magnetic field generated by the above.

  In addition, a control board 28 on which electronic components that perform control such as switching the current supplied to the armature winding 25 provided in the stator 26 with an electronic switch is provided, is a multiblade fan rather than the stator 26 and the rotor 21. In this example, it is disposed at a position closest to the multi-blade fan 4 inside the housing (in the drawing, near the upper end of the motor main body 30).

  Furthermore, a flange 31 for attaching the drive motor 3 to the scroll case 2 is formed at the lower end of the housing 30a of the motor main body 30 (the side opposite to the side from which the rotating shaft protrudes). In this example, the housing 30a of the motor main body 30 is made of a metal material excellent in heat conduction such as aluminum, and the flange portion 31 is made of resin.

  The multi-blade fan 4 mounted on the rotary shaft 11 of the drive motor 3 is formed to have a diameter substantially equal to or smaller than the diameter of the motor main body 30, and is axially front and rear without covering the outer periphery of the motor main body 30. Are installed side by side. That is, the motor main body 30 is provided so as to face the multiblade fan 4 without protrudingly disposed in the inner space of the cone portion 13.

  For this reason, the multi-blade fan 4 is provided with the boss portion 12 into which the rotating shaft 11 of the drive motor 3 is inserted closer to the motor main body side than the conventional one if the axial dimension is the same as the conventional one. A large passage area of the air introduction path extending between the suction port 15 and the blades 14 is secured.

  The multi-blade fan 4 scrolls the drive motor 3 so that the suction port 15 is close to the opening 6 of the scroll case 2 and is accommodated in the scroll case, and the motor body 30 projects into the scroll case 2. The multi-blade fan 4 is attached to the lower side wall 9 of the case 2 via a flange portion 31, and the side surface of the motor body 30 protruding into the scroll case, the outer periphery of the multi-blade fan 4, and the inner surface of the scroll case 2. A scroll-like air passage 32 is defined in which air sent out from between the blades in the radially outward direction is pumped to the discharge port 20.

  That is, if the axial dimension (H) of the blower unit itself is the same as that of the conventional blower unit, the lower side wall 9 of the scroll case 2 comes into contact with the flange portion 31 provided at the lower end of the motor main body 30. Thus, the axial direction dimension of the outer peripheral wall becomes larger than the conventional one, and the blower passage 32 is enlarged to reach the flange portion 31 provided at the lower end of the motor main body portion 30. For this reason, conventionally, the motor main body portion in which the control board or the like is accommodated is disposed outside the scroll case, and the periphery of the motor main body portion is not effectively used as a dead space. Will be used as the air passage 32.

  Therefore, when the drive motor 3 is energized and the multi-blade fan 4 rotates, the air warmed by the battery is sucked from the suction port 15 and guided between the blades 14 along the cone portion 13, and the diameter between the blades is reduced. It is sent outward and reaches the air passage 32, and is blown from the discharge port 20 through the air passage 32.

  For this reason, since the side surface of the motor main body 30 is exposed to the air passage 32 and the suction air directly contacts the motor main body 30, the effect of the motor main body 30 can be obtained even when the warm air on the downstream side of the battery is sucked. Cooling becomes possible. Further, in the above-described configuration, even if the axial dimension of the blower unit 1 is the same as the conventional one, in addition to ensuring a large passage from the suction port 15 of the multiblade fan 4 to the blades, Since the passage cross section of 32 is also secured, it is possible to reduce the suction resistance and avoid an air flow shortage and noise increase.

  In particular, in the above-described configuration, since the housing 30a of the motor main body 30 is made of metal, the heat generated in the motor main body 30 is easily transmitted to the housing, and heat dissipation can be promoted.

  Further, in the above-described configuration, the control board 28 that easily generates heat is disposed on the multi-blade fan 4 side of the stator 26 and the rotor 21 and is accommodated in a portion protruding into the scroll case of the motor main body 30. As the motor main body 30 is cooled, the control board 28 can be effectively cooled.

  Further, in the above-described configuration, since a brushless motor is used as the drive motor 3, no spark is generated by the brush, and even when air containing a gas such as hydrogen coming out of the battery is sucked and discharged, it is dangerous. This makes it possible to avoid such a situation.

  FIG. 3 shows a modification of the air blowing unit described above. In this example, the outer peripheral edge of the portion of the multi-blade fan facing the motor main body protrudes toward the motor main body along the tapered shape of the outer peripheral edge of the portion of the motor main body 30 facing the multi-blade fan. It is formed in a different shape. In this example, a guide protrusion 33 that protrudes along the tapered shape of the outer peripheral edge of the motor main body 30 is provided on the outer portion of the blade 14. Since other configurations are the same as those in the configuration example, the same numbers are assigned to the same portions, and descriptions thereof are omitted.

  In such a configuration, when the air sucked from the suction port 15 passes between the blades 14, the air is actively guided to the side of the motor main body 30 of the air passage 32. It can be expected to increase cooling.

  Further, as shown in FIG. 4, a large number of fins 34 may protrude from the outer peripheral surface of the housing 30 a of the motor main body 30. In such a configuration, a large contact area with the air flowing through the air passage 32 can be ensured, so that the heat dissipation effect can be enhanced.

  Although an example of an outer rotor type brushless motor has been described above, an inner rotor type brushless motor may be used. Moreover, although the structural example which has arrange | positioned the ventilation unit 1 in the downstream of a battery was shown in the above-mentioned example, this ventilation unit 1 is not limited to such use, A axial direction dimension is fully ensured. This is a useful configuration when the motor is cooled and a large air passage in the scroll case is secured at a place where the operation is not performed.

1A and 1B are diagrams showing a configuration example of a blower unit according to the present invention, in which FIG. 1A is a cross-sectional view cut in a direction perpendicular to a rotation axis of a drive motor, and FIG. It is sectional drawing cut | disconnected by the -A line | wire. FIG. 2 is a diagram illustrating a specific configuration example of the drive motor. FIG. 3 is a diagram showing another configuration example of the blower unit according to the present invention. FIG. 4 is a diagram showing still another configuration example of the blower unit according to the present invention. FIG. 5 is a diagram illustrating an example of a conventional blower unit.

Explanation of symbols

1 Blower Unit 2 Scroll Case 3 Drive Motor 4 Multiblade Fan 12 Boss Part 13 Cone Part 14 Blade 21 Rotor 25 Armature Winding 26 Stator 28 Control Board 30 Motor Main Body 31 Housing 33 Guide Projection 34 Radiation Fin

Claims (8)

A blower unit having a multiblade fan that blows air sucked from an axial direction outward, a scroll case that houses the multiblade fan, and a drive motor that is attached to the scroll case and rotates the multiblade fan In
The multi-blade fan mounted on the rotation shaft of the drive motor is formed to have a diameter substantially equal to or smaller than the diameter of the motor main body, and the motor main body of the drive motor protrudes inside the scroll case. The side surface of the portion of the motor body that protrudes into the scroll case is discharged along with the outer periphery of the multiblade fan and the inner surface of the scroll case. A blower unit characterized by defining a road. The blower unit according to claim 1, wherein the motor main body that protrudes into the scroll case has a metal housing. The blower unit according to claim 1, wherein the blower unit is used to cool a battery and is disposed downstream of the battery. The blower unit according to claim 1, wherein the drive motor is a brushless motor. The motor main body contains at least a control board for controlling the current supplied to the stator, the rotor, and the armature winding, and the control board is disposed closer to the multi-blade fan than the stator and the rotor. The air blower unit according to claim 1. The outer peripheral edge of the portion of the multi-blade fan facing the motor main body is formed in a shape along the shape of the outer peripheral edge of the portion of the motor main body facing the multi-blade fan. The blower unit according to claim 1. The blower unit according to claim 1, wherein a radiation fin is provided on an outer surface of the motor main body. The multi-blade fan includes a boss portion fixed to the rotating shaft of the drive motor, a cone portion connected to the boss portion, an axial periphery of the rotating shaft, and an outer peripheral edge of the cone portion. A plurality of blades provided along the circumferential direction of the air, the air sucked from the axial direction is guided to the blades along the cone portion, and passes between the blades and the blades, The blower unit according to claim 1, wherein the motor main body portion is not disposed to protrude inside the cone portion.

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