JP6551287B2 - Fan device - Google Patents

Description

  The present invention relates to a fan device for blowing air.

  A heat exchange unit for an automobile is conventionally provided with a fan shroud mounted on a heat exchanger, a motor mounted on a motor fixing portion provided on the fan shroud, and a fan mounted on a rotating shaft of the motor. (See, for example, Patent Document 1).

  In this heat exchange unit, a part of the motor is arranged in an opening formed in the motor fixing part, a part of the motor arranged in the opening of the motor fixing part, and an opening around the opening of the motor fixing part The motor is fixed to the motor fixing portion with a gap provided between the edges. In this heat exchange unit, the opening edge around the opening of the motor fixing portion and the outer edge of a part of the motor arranged in the opening of the motor fixing portion are opposed to each other. It is parallel to the axial direction of the rotation axis.

Japanese Patent Application Publication No. 2001-355448

  Further, in a fan apparatus for a vehicle, an electric motor partially disposed in an opening portion provided in a motor mount corresponding to a motor fixing portion, and fixed to one end side of a rotating shaft of the electric motor There is provided a bottomed cylindrical boss portion which rotates with the rotation shaft, and a fan blade disposed on the outer peripheral side of the boss portion.

  In this fan device, cooling ribs are formed on the inner peripheral surface of the boss portion. When the cooling rib rotates with the boss, the inside of the boss becomes negative pressure, and an axial flow fan disposed at the opening edge around the opening of the motor mount and the opening provided in the motor mount The air is taken into the boss from the gap between the motor and the motor to cool the inside of the motor.

  However, in the conventional fan device, as in the device described in Patent Document 1, the opening edge around the opening of the motor mount is parallel to the axial direction of the rotation shaft of the motor. There is a problem that the ventilation area is small and the motor cooling performance is not good.

  In addition, as in the device described in Patent Document 1, the opening edge around the opening of the motor mount and the outer edge of a part of the motor disposed in the opening of the motor mount are respectively In the configuration that is parallel to the axial direction of the rotating shaft, there is a problem that the assembling property when the motor mount is assembled to the motor is not good.

  The present invention has been made in view of the above problems, and has an object to improve the cooling performance of the motor and to improve the assemblability when assembling the motor mount to the motor.

In order to achieve the above object, the invention according to claim 1 is a fan device for blowing air, which is attached to one end side of a rotation shaft (31) of a motor (30) and rotates with the rotation shaft 10) and a motor mount (27) for supporting the motor, the motor mount (27) having an opening (40) in which a part of the motor is arranged, and the opening edge (27a) around the opening of the motor mount Among them, a slope is formed in a portion opposed to a part of the motor disposed in the opening so as to increase in diameter as it proceeds from the other end side of the rotation shaft to one end side. In the present embodiment, a slope is formed over the entire opening edge 27a around the opening 40, and a fastening portion (38) provided on the motor is provided at the opening edge around the opening of the motor mount. In the opening edge around the opening of the motor mount, the other end side of the rotation shaft is provided at the part facing the to-be-fastened part provided on the motor. The slope is formed to increase in diameter from one end side to the other end side .

  Therefore, compared with the case where the opening edge portion is configured to be parallel to the rotation axis of the motor, the passage area between the motor mount and a part of the motor is large, and the air introduced into the motor Since the flow is good, the cooling performance of the motor can be improved.

  Also, in the opening edge (27a) around the opening of the motor mount, the diameter of the opening edge (27a) increases as it proceeds from the other end side to the one end side of the rotation shaft Since the slope is formed as described above, when assembling the motor mount to the motor, positional deviation between the opening of the motor mount and a part of the motor can be absorbed, and the assemblability can also be improved.

  In addition, the code | symbol in the parenthesis of each means described by this column and the claim shows correspondence with the specific means as described in embodiment mentioned later.

It is the front view which looked at the axial-flow fan which concerns on one Embodiment of this invention from the air flow downstream. It is sectional drawing along the II-II line in FIG. It is the perspective sectional view which extracted and illustrated only the boss part of the axial flow fan concerning one embodiment of the present invention. It is sectional drawing along the IV-IV line in FIG. It is sectional drawing of the axial-flow fan in a comparative example.

  The whole structure of the air blower 1 which has the fan apparatus of this embodiment is demonstrated using FIGS. FIG. 1 is a front view of the blower 1 viewed from the upstream side under the air flow. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a perspective cross-sectional view showing only a boss portion of an axial blower extracted and shown in cross-section. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. In FIG. 4, the radiator 2, the axial fan 10, the stator 33, the permanent magnet 32 a and the like are omitted. Moreover, the arrow D1 which shows the up-down direction in FIG.1, FIG.2, FIG.4, the arrow D2 which shows the left-right direction, and the arrow D3 which shows the front-back direction have shown the direction in a vehicle mounting state.

  The blower 1 of this embodiment is arrange | positioned in the engine room of a vehicle, and blows the air for cooling with respect to heat exchangers, such as the radiator 2 and a capacitor | condenser (not shown). The blower 1 constitutes a cooling module that cools various in-vehicle devices together with the heat exchanger.

  Here, the radiator 2 is a heat exchanger that exchanges heat between the engine cooling water and the air to cool the engine cooling water. The condenser is a heat exchanger that exchanges heat between the high-pressure side refrigerant and air of the vapor compression refrigeration cycle that constitutes the vehicle air conditioner, and cools and condenses the high-pressure side refrigerant.

  As shown in FIG. 2, the blower 1 according to the present embodiment is disposed on the vehicle rear side of the radiator 2 and on the downstream side of the air flow passing through the radiator 2. The blower 1 sucks the air that has passed through the radiator 2 and blows it out toward the rear of the vehicle.

  The blower 1 includes an axial fan 10, a shroud 20, and a motor 30 as main components. The blower 1 of the present embodiment is an axial-flow-type blower provided with an axial-flow fan 10 that generates an air flow along the axial direction (fan axis CL1) of the rotary shaft 31 by the rotation of the rotary shaft 31 of the motor 30.

  The axial fan 10 will be described. The axial fan 10 is attached to one end side of the rotating shaft 31 of the motor 30 and rotates around the fan axis CL <b> 1 by the rotation of the rotating shaft 31 of the motor 30. The arrow DR1 direction in FIG. 1 is the rotation direction of the axial flow fan 10. The axial flow fan 10 has a boss portion 11 connecting the rotation shaft 31 of the motor 30, a plurality of blades 12, and a ring portion 13. The boss portion 11 is formed of a cylindrical member, and a rotor 32 of a motor 30, which will be described later, is provided therein. The boss portion 11 is rotatable around the rotation shaft 31 of the motor 30 via a bearing 31 a provided in the rotor 32.

  The plurality of blades 12 are provided radially on the outer peripheral side of the boss portion 11. The blades 12 are arranged at equal intervals in the circumferential direction of the boss portion 11.

  As shown in FIG. 3, a plurality of motor cooling ribs 110 are formed on the inner peripheral side of the boss portion 11. The motor cooling rib 110 is formed over the entire inner peripheral surface of the boss portion 11.

  The motor cooling ribs 110 are provided side by side in the circumferential direction of the fan. Each of the plurality of motor cooling ribs 110 is inclined with respect to the fan radial direction so as to deviate in the direction opposite to the fan rotation direction DR1 toward the radially outer side of the fan axis CL1.

  The motor cooling rib 110 introduces air outside the motor 30 into the motor 30 through a gap between the motor mount 27 and a center piece 35 of the motor 30 described later, thereby cooling the inside of the motor 30.

  Due to the rotation of the boss portion 11 provided with the motor cooling rib 110, the air outside the motor 30 is introduced into the motor 30 through the gap between the center piece 35 and the motor mount 27 as shown by the arrow F2 in FIG. Be done. Then, the air introduced into the motor 30 passes through the inside of the yoke 32 b and then is exhausted out of the motor 30 through the air passage 101 a formed between the plurality of motor cooling ribs 110.

  The ring portion 13 is an annular member provided on the outer peripheral side of each blade 12. As shown in FIG. 1, the ring portion 13 is a ring-shaped member centered on the fan axis CL1, and is a cylindrical member extending a predetermined length in the direction of the fan axis CL1 as shown in FIG. .

  The ring portion 13 has a cylindrical side wall 131. The ring portion 13 is connected to the outer peripheral end portion of each of the plurality of blades 12. In other words, the side wall 131 of the ring portion 13 is formed with a connecting portion 132 which is connected to each of the plurality of blades 12. In addition, not only the state in which the blade | wing 12 and the ring part 13 which were formed separately are connected with the connection said here but the state in which the blade | wing 12 and the ring part 13 which were formed integrally are continuing also are Including.

  Further, in the ring portion 13, a bell mouth 133 having an arc-shaped cross section is formed at the air flow upstream side end portion of the side wall 131. In the axial flow fan 10 of the present embodiment, the boss portion 11, the plurality of blades 12, and the ring portion 13 are integrally formed of a resin such as polypropylene. However, the material of the axial flow fan 10 is not limited to the resin, and may be configured using, for example, a material other than the resin, such as metal.

  Next, the shroud 20 will be described. The shroud 20 forms an air flow path 20 c that allows the air that has passed through the radiator 2 to flow toward the axial fan 10. The shroud 20 is molded of a resin such as polypropylene. However, the shroud 20 is not limited to resin, and may be configured using a material other than resin such as metal. The shroud 20 is formed with an air inlet 20a into which air flows in on the radiator 2 side, and an air outlet 20b into which air flows out is formed on the opposite side. In the shroud 20, an axial flow fan 10 is disposed on the air outlet 20b side inside.

  The shroud 20 has a motor mount 27 as a motor fixing portion for fixing the motor 30, a plurality of stays 26 for supporting the motor mount 27, and the like.

  The motor mount 27 has an opening 40 in which a part of the motor 30 is disposed, and a plurality of fastening portions 26 for supporting the motor 30. The motor mount 27 in the present embodiment has three fastening portions 26. Each fastening portion 26 is formed at an opening edge 27 a around the opening 40 of the motor mount 27. As shown in FIG. 4, each fastening portion 26 is formed with a hole for inserting a bolt 50.

  One of the fastening portions 26 is formed at a position located at the lower end of the opening 40 of the motor mount 27 when the shroud 20 of the blower 1 is placed vertically so that the rotation shaft 31 of the motor 30 is directed horizontally. ing. Moreover, each fastening part 26 is formed in the position corresponding to the three fastening convex parts 38 formed in the center piece 35 of the motor 30 mentioned later.

  Next, the motor 30 will be described. The motor 30 is an outer rotor type electric motor. As shown in FIG. 2, the motor 30 has a rotary shaft 31, a rotor 32, a stator 33, a center piece 35, a motor cover 37, and the like.

  The rotor 32 includes a permanent magnet 32a and a yoke 32b. The yoke 32b is fixed to the inside of the cylindrical boss portion 11, and is rotatable around the fan axis CL1 via the bearing 31a. The permanent magnet 32a is provided on the inner peripheral side of the yoke 32b.

  The stator 33 has a core and a coil (not shown) wound around the core. The stator 33 is disposed radially inward with respect to the rotor 32 around the axis of the rotating shaft 31 of the motor 30 and is fixed to the center piece 35. The coils of the stator 33 are energized from a control circuit (not shown), and the voltage and current thereof are controlled by the control circuit.

  The center piece 35 is configured by a plate-like member, and supports and fixes the rotation shaft 31 of the motor 30. In the present embodiment, the rotation shaft 31 of the motor 30 is fixed to the center of the center piece 35. A stator 33, a motor cover 37, and the like are attached to the center piece 35. The center piece 35 is disposed in the opening 40 of the motor mount 27.

  The center piece 35 is formed with a plurality of fastening projections 38 for fixing the motor 30 to the motor mount 27. Each fastening protrusion 38 is formed so as to protrude radially outward from the outer edge of the center piece 35. As shown in FIG. 4, bolt holes 38 a for fastening the bolts 50 are formed in each fastening convex portion 38. A screw groove is formed on the inner peripheral surface of the bolt hole 38a. The fastening convex portion 38 corresponds to a fastened portion provided in the motor.

  The positions of the holes formed in the fastening portion 26 of the motor mount 27 and the bolt holes 38 a formed in the fastening convex portion 38 of the center piece 35 are made to coincide with each other, and the surface of the motor mount 27 facing the boss 11 The center piece 35 is supported and fixed to the motor mount 27 by fastening the bolt 50 from the opposite side.

  A gap is formed between the motor mount 27 and the center piece 35 except for the portion where the fastening convex portion 38 of the center piece 35 and the fastening portion 26 of the motor mount 27 are fastened. However, no gap is formed between the motor mount 27 and the center piece 35 at the portion where the fastening convex portion 38 of the center piece 35 and the fastening portion 26 of the motor mount 27 are fastened.

  The motor cover 37 is made of a resin or metal member, and covers a control circuit that controls the current flowing to the coil, and a circuit component that detects an overcurrent flowing to the coil.

  In the fan 1 configured as described above, when the axial flow fan 10 is rotated by the rotation of the rotation shaft 31 of the motor 30, the air having passed through the radiator 2 is transmitted to the axial flow fan 10 as shown by arrow F1 in FIG. The air is sucked and blown out from the axial fan 10 along the fan axis CL1.

  Next, main features of the blower 1 according to the present embodiment will be described. As shown in FIG. 2, the opening edge 27 a around the opening 40 of the motor mount 27 is disposed to face the center piece 35 of the motor 30 disposed at the opening 40 of the motor mount 27 with a gap. It is done.

  As described above, the motor cooling rib 110 is provided inside the boss portion 11 and plays a role of a centrifugal fan as the axial fan 10 rotates. By rotation of the boss portion 11 provided with the motor cooling rib 110, air outside the motor 30 is introduced into the motor 30 through the gap between the center piece 35 and the motor mount 27.

  Then, the air introduced into the motor 30 passes through the inside of the yoke 32 b and then is exhausted out of the motor 30 through the air passage 101 a formed between the plurality of motor cooling ribs 110. Thereby, the coil etc. of the stator 33 arrange | positioned in the motor 30 are cooled.

  Here, in the present embodiment, the opening edge 27 a around the opening 40 of the motor mount 27 is inclined with respect to the axial center of the rotation shaft 31 of the motor 30. Specifically, the opening edge 27a is formed with a slope so as to increase in diameter as it proceeds from the other end of the rotation shaft 31 of the motor 30 to one end where the axial fan 10 is attached. In the present embodiment, a slope is formed over the entire opening edge 27 a around the opening 40.

  As a result, the passage area between the center piece 35 of the motor 30 and the opening edge 27a around the opening 40 of the motor mount 27 is large, and the wind flow introduced into the motor 30 is good. The cooling performance of 30 can be improved.

  FIG. 5 is a view corresponding to FIG. 2, and shows a comparative example in which the opening edge 27 a around the opening 40 of the motor mount 27 is parallel to the axis of the rotating shaft 31 of the motor 30. FIG. Thus, when the opening edge 27a is parallel to the axis of the rotating shaft 31 of the motor 30, the flow path area between the center piece 35 of the motor 30 and the opening edge 27a is narrow, The wind flow introduced into the motor 30 is poor, and the cooling performance of the motor 30 is not good.

  According to the configuration described above, the fan device is attached to one end of the rotating shaft 31 of the motor 30, has the fan 10 that rotates together with the rotating shaft 31, and the opening 40 in which the motor 30 is disposed. And a motor mount 27 for supporting. Furthermore, at least a part of the opening edge 27a around the opening 40 of the motor mount 27 is formed with a slope so as to increase in diameter as it proceeds from the other end side of the rotation shaft 31 to one end side.

  Therefore, the passage area between the motor mount 27 and the motor 30 is wider than in the case where the opening edge 27 a is configured to be parallel to the rotation shaft 31 of the motor 30, and is introduced into the motor 30. Therefore, the cooling performance of the motor 30 can be improved.

  Further, in the opening edge 27a around the opening 40 of the motor mount 27, the part facing the part of the motor disposed in the opening 40 moves from the other end side of the rotary shaft 31 to one end side Since the slope is formed so as to expand the diameter, when assembling the motor mount 27 to the motor 30, the positional deviation between the opening 40 of the motor mount 27 and a part of the motor 30 can be absorbed. Can also be improved.

  A fastening portion 26 that is fastened to a fastening convex portion 38 provided on the center piece 35 of the motor 30 is formed on the opening edge portion 27 a around the opening portion 40 of the motor mount 27. In the opening edge portion 27a around the opening 40 of the motor mount 27, the portion facing the fastening convex portion 38 provided on the center piece 35 of the motor 30 is one end side from the other end side of the rotation shaft 31 A gradient is formed which increases in diameter as it proceeds.

  For this reason, when the shroud 20 of the blower 1 is placed vertically so that the rotation shaft 31 of the motor 30 is directed in the horizontal direction, the opening piece 27a of the center piece 35 around the opening 40 of the motor mount 27 By the gradient formed in the part facing the fastening convex part 38, the drainage property of the water adhering to the fastening part 26 can be improved. Furthermore, it is possible to prevent rust of the bolt 50 provided in the fastening portion 26.

  Further, the fastening portion 26 of the motor mount 27 and the center piece 35 are formed by the slope formed in the portion of the opening edge 27 a around the opening 40 of the motor mount 27 facing the fastening convex portion 38 of the center piece 35. The positions of the fastening projections 38 can be easily made to coincide with each other, and the assemblability at the time of assembling the motor mount 27 to the motor 30 can be improved.

  In particular, the motor 30 is mounted on the motor 30 in a state in which the motor 30 is fixed by a slope formed at a portion of the opening edge 27 a around the opening 40 of the motor mount 27 facing the fastening convex portion 38 of the center piece 35. Positioning at the time of automatically assembling 27 can be facilitated.

(Other embodiments)
(1) In the above embodiment, the gradient is formed over the entire circumference of the motor mount 27 disposed to face the center piece 35 of the motor 30. On the other hand, a slope may be formed in a part of the motor mount 27 disposed to face the center piece 35 of the motor 30.

  (2) In the above embodiment, although the fastening convex part 38 formed on the center piece 35 of the motor 30 is fastened to the fastening part 26 of the motor mount 27 using the bolt 50, the fastening is limited to using the bolt 50 For example, the motor 30 may be fastened to the motor mount 27 using screws or rivets.

  (3) In the above embodiment, the cross section of the opening edge 27a around the opening 40 of the motor mount 27 is linear, but the cross section of the opening edge 27a may be curved. .

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Moreover, said each embodiment is not mutually irrelevant and can be combined suitably, unless the combination is clearly impossible. Further, in each of the above-described embodiments, it is needless to say that the elements constituting the embodiment are not necessarily essential except when clearly indicated as being essential and when it is considered to be obviously essential in principle. Yes. Further, in the above embodiments, when numerical values such as the number, numerical value, amount, range, etc. of constituent elements of the embodiment are mentioned, it is clearly indicated that they are particularly essential and clearly limited to a specific number in principle. The number is not limited to the specific number except for the case. Further, in the above embodiments, when referring to materials, shapes, positional relationships, etc. of constituent elements etc., unless specifically stated otherwise or in principle when limited to a specific material, shape, positional relationship, etc., etc. It is not limited to the material, the shape, the positional relationship, etc.

(Summary)
-According to the first aspect shown in part or all of the above embodiments, the fan device for blowing air is attached to one end side of the rotation shaft of the motor, and the fan rotates with the rotation shaft, and A motor mount having an opening in which a portion is disposed and supporting the motor.

  And in the opening edge part around the opening part of the motor mount, in the part facing the part of the motor arranged in the opening part, the diameter is increased as it proceeds from the other end side to the one end side of the rotating shaft. A gradient is formed.

  -According to the second aspect shown in part or all of the above embodiment, at the opening edge around the opening of the motor mount, the fastening part to be fastened to the fastening part provided on the motor is It is formed.

Then, at the part of the opening edge around the opening of the motor mount that faces the to-be-fastened part provided on the motor, a slope is formed so as to increase in diameter from one end to the other According to this, of the opening edge around the opening of the motor mount, the slope formed at the portion facing the fastening convex portion of the center piece makes the fastening portion of the motor mount and the center piece The positions of the parts to be fastened can be easily matched, and the assemblability at the time of assembling the motor mount to the motor can be improved.

  In particular, positioning at the time of automatic assembly of the motor mount to the motor with the motor fixed by the slope formed at the part of the opening edge around the opening of the motor mount facing the fastening of the center piece It can be easy.

  Furthermore, when the shroud of the blower is placed vertically so that the rotation axis of the motor is directed horizontally, the opening edge around the opening of the motor mount is formed at the part facing the fastening convex part of the center piece By the gradient, the drainage property of water adhering to the fastening portion can be improved, and furthermore, the rust of the bolt provided in the fastening portion can be prevented.

Reference Signs List 1 blower 10 axial flow fan 11 boss portion 12 blade 20 shroud 27 motor mount 27a opening edge portion 26 fastening portion 30 motor 35 center piece 38 fastening convex portion

Claims (1)

A fan device for blowing air,
A fan (10) attached to one end side of a rotation shaft (31) of the motor (30) and rotating with the rotation shaft;
A motor mount (27) having an opening (40) in which a portion of the motor is disposed, and supporting the motor;
From the other end side of the rotation shaft to the one end side of the opening edge portion (27a) around the opening portion of the motor mount at a portion facing the part of the motor disposed in the opening portion The slope is formed to expand as it progresses ,
The opening edge around the opening of the motor mount is formed with a fastening portion (26) to be fastened to a fastening portion (38) provided to the motor,
The diameter of the opening edge around the opening of the motor mount is increased as it proceeds from the other end side of the rotation shaft to the one end side at a portion facing the to-be-fastened portion provided on the motor. A fan device in which the slope is formed .

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