JP2016151240A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blower which can achieve quietness and improvement of efficiency by suppressing size increase in a radial dimension of a casing, and by suppressing generation of turbulence of air in the vicinity of a second side surface part.SOLUTION: An air guide surface 11a inclining to a second side surface part 32 side from a radial direction center part side toward a radial direction outside is provided on one side surface of a substrate 11 of an impeller 10. A flange inclined surface 30c extending in parallel with the air guide surface 11a of the impeller 10 from a portion located on further radial direction inside than an outer peripheral part of the impeller 10 toward the radial direction outside is provided on the surface of the inside of a casing 30 of a motor flange 30a. A scroll inclined surface 30e extending in parallel with the air guide surface 11a toward the radial direction outside being continuous with the flange inclined surface 30c is provided, on the surface of the inside of the casing 30 of the second side surface part 32 of a scroll casing 30b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a blower used for an air conditioner, for example.

  Conventionally, as this type of blower, a cylindrical impeller that allows air to flow in from an axial end and flow out of the outer periphery, and an impeller are housed, and the air that flows out from the outer periphery of the impeller is impeller And a casing formed with a spiral air passage that circulates in the rotation direction of the gas and a discharge air passage that extends from the terminal portion of the spiral air passage toward the air outlet (for example, Patent Document 1). reference).

  The impeller of the blower has a disc in which a drive shaft of an electric motor is connected to a central portion in a radial direction, and a plurality of blades extending in parallel with a direction in which the drive shaft extends from one outer peripheral side of the disc. Then, the air that has flowed in from the one side surface of the disk is caused to flow out radially outward.

  The blower casing includes a first side surface provided on one side of the disk of the impeller accommodated therein, a second side surface provided on the other side of the disk, a first side surface, An outer peripheral surface portion extending in the circumferential direction of the impeller between the outer peripheral portions of the two side surface portions, an air suction port is formed on the first side surface portion, and an air discharge port is formed on the outer peripheral surface portion side. .

  In the blower, the dimensions in the direction of the rotation axis in the spiral air passage and the discharge air passage are increased to increase the cross-sectional area of the air passage, thereby reducing the air flow velocity and reducing the pressure loss, and reducing noise and efficiency. We are trying to improve. Therefore, in the blower, as shown in FIG. 6, an inclined surface 103 that is inclined downward toward the outer peripheral surface portion 102 is formed on the outer peripheral side of the second side surface portion 101 in the casing 100.

JP 2003-193998 A

  By the way, on the disk 111 of the impeller 110, there is an air guide surface 112 that is inclined downward from the first side surface portion side of the casing 100 toward the second side surface portion 101 side from the radial center to the radial outer side. Although it is provided, the radially outer side extends in a direction orthogonal to the rotation axis of the impeller 110, so that air flowing out from the outer peripheral side of the impeller 110 is guided in a direction orthogonal to the rotation axis.

  For this reason, when the angle θ of the inclined surface 103 of the casing 100 is large with respect to the direction orthogonal to the rotation axis of the impeller 110, the air flowing out from the outer peripheral side of the impeller 110 flows along the inclined surface 103. It is difficult, and there is a possibility that the air flow is disturbed in the vicinity of the second side surface portion 101 and the pressure loss and noise increase.

  Further, when the angle θ of the inclined surface 103 of the casing 100 is small with respect to the direction orthogonal to the rotation axis of the impeller 110, the air flowing out from the outer peripheral side of the impeller 110 easily flows along the inclined surface 103. Therefore, it is possible to make it difficult to disturb the air flow in the vicinity of the second side surface portion 101. However, when the angle θ of the inclined surface 103 of the casing 100 is small, it is necessary to increase the radial dimension of the casing 100 in order to ensure a necessary cross-sectional area of the ventilation path.

  The object of the present invention is to suppress the increase in the radial dimension of the casing and to suppress the occurrence of air turbulence in the vicinity of the second side surface portion, thereby improving the silence and efficiency. It is to provide a blower.

  In order to achieve the above-mentioned object, the present invention provides a disk having a drive shaft coupled to a central portion in the radial direction, and a plurality of blades extending in parallel with the axial direction of the drive shaft from the outer peripheral side of one side surface of the disk An impeller that causes the air introduced from one side of the disk to flow out radially outward, a first side surface provided on one side of the disc of the accommodated impeller, A second side surface portion provided on the other side surface of the disk, and an outer peripheral surface portion extending in the circumferential direction of the impeller between the outer peripheral portions of the first side surface portion and the second side surface portion. A casing having an air suction port formed in the side surface portion and an air discharge port formed in the outer peripheral surface portion, and radially outward of one side surface of the impeller disk from the radial center portion side. An air guide surface that is inclined toward the second side surface portion of the casing and guides the air sucked from the air suction port radially outward. The casing includes a flange having an outer diameter larger than the outer diameter of the impeller, and a scroll casing that engages with the outer peripheral portion of the flange. The inner surface of the casing is provided with a flange inclined surface extending in parallel with the air guide surface of the impeller from the portion located radially inward of the outer peripheral portion of the impeller toward the radially outer side. On the inner surface of the casing of the two side surfaces, there is provided a scroll inclined surface extending in parallel with the air guide surface of the impeller toward the radially outer side continuously to the flange inclined surface.

  As a result, the air that flows along the air guide surface and flows out from the outer peripheral side of the impeller flows on the flange inclined surface and the scroll inclined surface that are parallel to the air guide surface. Regardless of the angle of the surface, air turbulence on the second side surface side of the casing is suppressed.

  According to the present invention, since the disturbance of the air flow in the vicinity of the second side surface portion of the casing can be suppressed regardless of the angles of the flange inclined surface and the scroll inclined surface, the radial dimension of the casing can be increased. While suppressing, it becomes possible to aim at the improvement of silence and efficiency.

It is a perspective view of the air blower which shows one Embodiment of this invention. It is the figure which looked at the air blower from the inlet side. It is sectional drawing of an air blower. It is AA sectional drawing of FIG. It is a figure which shows the assembly | attachment method of an air blower. It is sectional drawing of the conventional air blower.

  1 to 5 show an embodiment of the present invention.

  As shown in FIG. 1, the blower 1 of the present invention is a centrifugal blower, and is used as, for example, a blower of a vehicle air conditioner.

  As shown in FIG. 4, the blower 1 includes an impeller 10 formed in a cylindrical shape, an electric motor 20 for rotating the impeller 10, and a casing 30 surrounding the impeller 10.

  As shown in FIG. 4, the impeller 10 has a disk-like substrate 11 in which the drive shaft 21 of the electric motor 20 is connected to the center portion in the radial direction, and one end portion connected to the outer peripheral side of one side surface of the substrate 11. The plurality of blades 12 extending in parallel with the axial direction of the drive shaft 21 and the rim 13 that connects the other end portions of the plurality of blades 12 to each other.

  As shown in FIG. 4, the substrate 11 has a conical shape in which the central portion in the radial direction projects toward one side, and the electric motor 20 is disposed on the other side. An air guide surface 11 a that is formed at a predetermined inclination angle and guides the air radially outward is formed on the outer side in the radial direction on one side of the substrate 11.

  As shown in FIG. 3, the plurality of blades 12 are arranged at intervals in the circumferential direction of the substrate 11. Each of the plurality of blades 12 extends from the radially inner side of the substrate 11 toward the radially outer side, and the radially outer side is curved toward the circumferential direction of the substrate 11 with respect to the radially inner side. In addition, each of the plurality of blades 12 protrudes radially outward from the outer peripheral portion of the substrate 11. Furthermore, as shown in FIG. 4, one end of each of the plurality of blades 12 extends radially outward at substantially the same angle as the air guide surface 11a as shown in FIG. An overhanging portion 12a that projects from the side to the other side surface is provided.

  The rim 13 is a ring-shaped member that connects the other end portions of the plurality of blades 12 in the rotation axis direction at intervals in the circumferential direction.

  As shown in FIG. 4, the casing 30 includes a first side surface portion 31 provided on one side surface of the substrate 11 of the impeller 10 and a second side surface portion provided on the other side surface of the substrate 11 of the impeller 10. 32 and an outer peripheral surface portion 33 extending in the circumferential direction of the impeller 10 between the outer peripheral portions of the first side surface portion 31 and the second side surface portion 32.

  The outer peripheral surface portion 33 is a spiral spiral portion 33a in which the distance from the rotation center of the impeller 10 gradually increases from a predetermined reference position away from the rotation center of the impeller 10 toward the rotation direction of the impeller 10; A linear portion 33b extending linearly from the radially outer end of the spiral portion 33a, and a tongue extending in a direction opposite to the spiral portion 33a with a predetermined radius of curvature from the radially inner end of the spiral portion 33a 33c and an extending portion 33d extending from the tongue portion 33c and extending from the straight portion 33b at an interval.

  Further, as shown in FIG. 4, the first side surface portion 31 of the casing 30 is provided with an air suction port 34 for sucking air outside the casing 30. The air inlet 34 is a circular opening having a diameter smaller than the outer diameter of the impeller 10.

  Further, as shown in FIG. 3, air sucked into the casing 30 is provided at the end of the portion surrounded by the first side surface portion 31, the second side surface portion 32, the straight portion 33 b, and the extending portion 33 d of the casing 30. An air discharge port 35 for discharging is provided.

  Further, in the casing 30, a portion between the first side surface portion 31 and the second side surface portion 32, and the outer peripheral side of the impeller 10 and the spiral portion 33 a of the outer peripheral surface portion 33 and the spiral portion 33 a side of the linear portion 33 b. As shown in FIGS. 3 and 4, a spiral air passage 36 is provided for circulating the air flowing in from the air suction port 34 on the outer peripheral side of the impeller 10 in the rotational direction of the impeller 10. ing. Further, between the first side surface portion 31 and the second side surface portion 32 in the casing 30 and between the air discharge port 35 side of the linear portion 33b and the extension portion 33d, the end of the spiral air passage 36 is provided. A discharge ventilation path 37 that communicates the section with the air discharge port 35 is provided.

  In the spiral ventilation path 36, the width dimension of the ventilation path gradually increases in the radial direction from the start end to the end. Further, in the discharge ventilation path 37, the width dimension of the ventilation path gradually increases in the radial direction from the terminal end of the spiral ventilation path 36 toward the air discharge port 35. Further, the start end side of the spiral air passage 36 is partitioned from the discharge air passage 37 by the tongue 33c.

  The casing 30 includes two members, a motor flange 30a to which the electric motor 20 is attached and a scroll casing 30b attached to the motor flange 30a. The motor flange 30 a and the scroll casing 30 b are connected to each other at the second side surface portion 32.

  The motor flange 30a is a disk-like member to which the electric motor 20 is attached at the center in the radial direction. The outer diameter dimension of the motor flange 30a is formed larger than the outer diameter dimension of the impeller 10, as shown in FIG. Further, a flange slope extending in parallel with the air guide surface 11a of the impeller 10 from the portion located radially inward of the outer peripheral portion of the impeller 10 toward the radially outer side is provided on the inner surface of the casing 30 of the motor flange 30a. A surface 30c is provided. Further, an engagement groove 30d formed in a circumferential shape with which the scroll casing 30b is engaged is provided on the outer peripheral portion of the motor flange 30a.

  As shown in FIG. 4, the air guide surface 11a of the impeller 10 is continuously connected to the flange inclined surface 30c while being attached to the motor flange 30a. The scroll inclined surface 30e is provided to extend in parallel. Further, an engagement convex portion 30f formed in a circumferential shape that engages with the engagement groove 30d of the motor flange 30a is provided on the inner peripheral portion of the second side surface portion 32 of the scroll casing 30b.

  The blower 1 configured as described above assembles the scroll casing 30b to the motor flange 30a constituting the casing 30 in the final assembly process.

Specifically, first, the electric motor 20 is attached to the motor flange 30 a, and then the impeller 10 is attached to the electric motor 20.
Next, as shown in FIG. 5, by engaging the engagement protrusion 30f of the scroll casing 30b with the engagement groove 30d of the motor flange 30a integrally formed with the impeller 10 and the electric motor 20, The scroll casing 30b is assembled to the motor flange 30a.

  In the blower 1 assembled as described above, when the electric motor 20 is driven, the impeller 10 rotates in one circumferential direction. When the impeller 10 rotates, the air outside the casing 30 is sucked into the casing 30 through the air suction port 34 provided in the first side surface portion 31. Air sucked into the casing 30 through the air suction port 34 flows into the radial direction inside the impeller 10 from one side of the substrate 11 and is adjacent to the blades 12 provided on the outer peripheral portion of the impeller 10. It flows out radially from the gap with the wing 12. The air that has flowed radially from the outer peripheral portion of the impeller 10 flows through the spiral air passage 36 and the discharge air passage 37 of the casing 30 and is discharged from the air discharge port 35.

  At this time, the air flowing inward in the radial direction of the impeller 10 circulates along the air guide surface 11a on one side surface of the substrate 11 as shown by the solid line arrow in FIG. 4, and the inclination angle of the air guide surface 11a. And flows out from the outer peripheral portion of the impeller 10. The air flowing out from the outer peripheral portion of the impeller 10 flows along the flange inclined surface 30c and the scroll inclined surface 30e of the second side surface portion 32 of the casing 30 extending in parallel with the air guide surface 11a. Thereby, the air that flows out from the outer peripheral portion of the impeller 10 reaches the outer peripheral surface portion 33 of the casing 30 without being disturbed in the flow at the second side surface portion 32 of the casing 30.

  Further, in the outer peripheral portion of the impeller 10, the air in the outer peripheral portion of the substrate 11 is also casing by the overhanging portion 12 a that protrudes from one side of the substrate 11 to the other side as shown by the dashed arrows in FIG. 4. 30 toward the outer peripheral surface portion 33.

  Thus, according to the air blower of this embodiment, the air guide surface 11a which inclines to the 2nd side part 32 side toward the radial direction outer side from the radial direction center part side on the one side surface of the board | substrate 11 of the impeller 10. Provided on the inner surface of the casing 30 of the motor flange 30a, a flange inclined surface extending in parallel with the air guide surface 11a of the impeller 10 from the portion located radially inward of the outer peripheral portion of the impeller 10 toward the radially outer side 30c is provided, and a scroll inclined surface 30e extending in parallel with the air guide surface 11a toward the radially outer side is provided on the inner surface of the casing 30 of the second side surface portion 32 of the scroll casing 30b. Yes.

  Thereby, the air which flows out from the outer peripheral part of the impeller 10 along the air guide surface 11a is along the flange inclined surface 30c and the scroll inclined surface 30e of the 2nd side part 32 of the casing 30 extended in parallel with the air guide surface 11a. Therefore, regardless of the angles of the flange inclined surface 30c and the scroll inclined surface 30e, the disturbance of the air flow in the vicinity of the second side surface portion of the casing can be suppressed. It is possible to suppress noise reduction and to improve the quietness and efficiency.

  Further, the outer peripheral side of the impeller 10 in the blade 12 projects outward in the radial direction from the outer peripheral portion of the substrate 11, and one side surface of the substrate 11 is disposed at the end of the blade 12 in the direction of the drive shaft 21 on the substrate 11 side. An overhanging portion 12a that projects from the side to the other side surface is provided.

  Thereby, since the air of the outer peripheral part of the board | substrate 11 is sent toward radial direction outer side by the overhang | projection part 12a, the air which flows out from the outer peripheral part of the impeller 10 is reliably sent to the flange inclined surface 30c and the scroll inclined surface 30e. It can be distributed along.

  In addition, in the said embodiment, it is also possible to apply to ventilation means, such as an air conditioning apparatus in the room | chamber interior of a building, and a ventilation apparatus other than the sending means of the air conditioning apparatus for vehicles.

  Moreover, although the said embodiment showed what installed the 1st side part 31 of the casing 30 facing upwards, and turned the 2nd side part 32 downward, it is not restricted to this. The second side surface portion 32 of the casing 30 may be installed upward and the first side surface portion 31 may be installed downward, or the first side surface portion 31 and the second side surface portion 32 may be installed horizontally. Also good.

  DESCRIPTION OF SYMBOLS 1 ... Blower, 10 ... Impeller, 11 ... Board | substrate, 11a ... Air guide surface, 12 ... Blade | wing, 12a ... Overhang | projection part, 30 ... Casing, 30a ... Motor flange, 30b ... Scroll casing, 30c ... Flange inclined surface, 30e DESCRIPTION OF SYMBOLS Scroll inclined surface, 31 ... 1st side part, 32 ... 2nd side part, 33 ... Outer peripheral surface part, 34 ... Air inlet, 35 ... Air outlet.

Claims (2)

A disk having a drive shaft coupled to a central portion in a radial direction, and a plurality of blades extending in parallel to the axial direction of the drive shaft from an outer peripheral side of one side of the disk, and flows from one side of the disk An impeller for letting the discharged air flow out radially outward;
The first side surface provided on one side of the disc of the impeller accommodated, the second side provided on the other side of the disc, the first side and the second side An outer peripheral surface portion extending in the circumferential direction of the impeller between the outer peripheral portions, and a casing having an air suction port formed in the first side surface portion and an air discharge port formed in the outer peripheral surface portion,
On the radially outer side of one side of the disk of the impeller, the air sucked from the air suction port is inclined radially outward from the radially central portion toward the second lateral portion of the casing. Air guide surface to guide is provided,
The casing constitutes a part of the second side surface portion, and has a flange having an outer diameter dimension larger than the outer diameter dimension of the impeller, and a scroll casing engaged with the outer peripheral portion of the flange,
A flange inclined surface extending in parallel with the air guide surface of the impeller toward the radially outer side from a portion located radially inward of the outer peripheral portion of the impeller is provided on the inner surface of the casing of the flange,
The scroll inner surface of the second side surface portion of the scroll casing is provided with a scroll inclined surface extending in parallel with the air guide surface of the impeller toward the radially outer side continuously to the flange inclined surface. Blower. The outer peripheral side of the impeller blade protrudes radially outward from the outer peripheral portion of the disk,
The blower according to claim 1, wherein an end of the blade in the drive shaft direction on the disk side protrudes from the other side of the disk.

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