Blower and moving body

Abstract

This blower comprises a fan unit and a motor unit. The motor unit is mounted on the fan unit. The fan unit has a centrifugal fan and a fan case. The fan case houses the centrifugal fan. The motor unit has a rotor, a stator, a bearing, and a motor case. The rotor includes a rotary shaft coupled to the centrifugal fan. The stator rotates the rotor. The bearing rotatably supports the rotary shaft. The motor case houses the rotor, the stator, and the bearing. The blower further comprises a restriction member. The restriction member restricts the entry of foreign matter into the bearing.

Description

Fans and moving objects

[0001] The present disclosure generally relates to a blower and a moving body, and more particularly to a blower including a motor unit and a fan unit, and a moving body including the blower.

[0002] Patent Document 1 describes an electric blower equipped with a pair of bearings. Each of the pair of bearings has an inner ring, an outer ring, balls, and a seal plate. The pair of bearings is provided on both ends of a rotor shaft and is supported by a bearing housing.

[0003] In the electric blower described in Patent Document 1, the seal plates provided in each bearing prevent dust and other particles from entering the interior of each bearing, thereby extending the life of each bearing.

[0004] The electric blower (blower) described in Patent Document 1 employs a sealing structure in which a seal plate is disposed inside each bearing, which leads to increased costs. In other words, the electric blower described in Patent Document 1 has a problem in that it is difficult to achieve both suppression of cost increases and an extension of the life of the bearings.

[0005] Japanese Patent Application Publication No. 11-093892

[0006] An object of the present disclosure is to provide a blower and a moving body that can achieve both suppression of cost increases and an extension of the life of bearings.

[0007] A blower according to one aspect of the present disclosure includes a fan unit and a motor unit. The motor unit is attached to the fan unit. The fan unit has a centrifugal fan and a fan case. The fan case houses the centrifugal fan. The motor unit has a rotor, a stator, a bearing, and a motor case. The rotor includes a rotating shaft connected to the centrifugal fan. The stator rotates the rotor. The bearing rotatably supports the rotating shaft. The motor case houses the rotor, the stator, and the bearing. The blower further includes a restricting member. The restricting member restricts foreign matter from entering the bearing. A moving body according to one aspect of the present disclosure includes the blower, an object to be cooled, and a vehicle body. The object to be cooled is cooled by the blower. The vehicle body carries the blower and the object to be cooled.

[0008] According to the blower and the moving body according to the above aspects of the present disclosure, it is possible to suppress an increase in costs and extend the life of the bearings at the same time.

[0009] FIG. 1 is a plan view of a blower according to a first embodiment. FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1. FIG. 3 is an exploded perspective view of the blower according to the same embodiment. FIG. 4A is a perspective view of a board holder included in the blower according to the same embodiment. FIG. 4B is a perspective view of a heat sink included in the blower according to the same embodiment. FIG. 4C is a perspective view of an insulating sheet included in the blower according to the same embodiment. FIG. 4D is a perspective view of a circuit board included in the blower according to the same embodiment. FIG. 5 is a schematic view of the vicinity of a bearing included in the blower according to the same embodiment. FIG. 6 is a conceptual diagram of a moving body on which the blower according to the same embodiment is mounted. FIG. 7 is a schematic view of the vicinity of a bearing included in the blower according to the second embodiment. FIG. 8 is a schematic view of the vicinity of a bearing included in the blower according to the third embodiment. FIG. 9 is a schematic view of the vicinity of a bearing included in the blower according to the fourth embodiment. FIG. 10 is a schematic view of the vicinity of a bearing included in the blower according to the fifth embodiment. FIG. 11 is a schematic view of the vicinity of a bearing included in the blower according to the sixth embodiment.

[0010] Hereinafter, fans and moving bodies according to embodiments 1 to 6 will be described with reference to the drawings. The drawings referred to in the following embodiments 1 to 6 are schematic diagrams. The sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensions. The size ratios and thickness ratios between the components also do not necessarily reflect the actual dimensional ratios.

[0011] First Embodiment (1) Overview First, an overview of a blower 1 and a moving body 9 according to a first embodiment will be described with reference to FIGS. 1 to 6. FIG.

[0012] The blower 1 according to the first embodiment is mounted on a mobile object 9 such as an automobile. The blower 1 is not limited to being mounted on the mobile object 9, and may be mounted on other devices such as home appliances.

[0013] FIG. 1 is a plan view of a blower 1 according to a first embodiment. FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1. FIG. 3 is an exploded perspective view of the blower 1. FIG. 4A is a perspective view of a board holder 54 included in the blower 1. FIG. 4B is a perspective view of a heat sink 55 included in the blower 1. FIG. 4C is a perspective view of an insulating sheet 56 included in the blower 1. FIG. 4D is a perspective view of a circuit board 57 included in the blower 1. FIG. 5 is a schematic view of the vicinity of a bearing 681 included in the blower 1. FIG. 6 is a conceptual diagram of a moving body 9 on which the blower 1 is mounted. As shown in FIGS. 1 to 5 , the blower 1 includes a fan unit 12 and a motor unit 14. The motor unit 14 is attached to the fan unit 12. The fan unit 12 includes a centrifugal fan 2 and a fan case 3. The fan case 3 houses the centrifugal fan 2. The motor unit 14 has a rotor 51, a stator 53, a bearing 681, and a motor case 6. The rotor 51 includes a rotating shaft 514 connected to the centrifugal fan 2. The stator 53 rotates the rotor 51. The bearing 681 rotatably supports the rotating shaft 514. The motor case 6 houses the rotor 51, the stator 53, and the bearing 681. The blower 1 further includes a restricting member 7 (see FIG. 5 ). The restricting member 7 restricts foreign matter from entering the bearing 681.

[0014] The blower 1 includes a restricting member 7 that restricts the intrusion of foreign matter into the interior of the bearing 681. This makes it possible to restrict the intrusion of foreign matter into the interior of the bearing 681 more effectively than in a case where no restricting member is provided. As a result, it is possible to extend the life of the bearing 681. The blower 1 makes it possible to suppress an increase in cost compared to a case where a sealing plate (sealing member) is provided inside the bearing. In other words, the blower 1 makes it possible to suppress an increase in cost while also extending the life of the bearing 681.

[0015] 6 , the moving body 9 includes the blower 1, an object to be cooled 91, and a vehicle body 97. The object to be cooled 91 is cooled by the blower 1. The vehicle body 97 carries the blower 1 and the object to be cooled 91. Because the moving body 9 includes the blower 1, it is possible to suppress an increase in costs and extend the life of the bearing 681.

[0016] (2) Details Next, components of the blower 1 and the moving body 9 according to the first embodiment will be described in detail with reference to FIGS. 1 to 6. FIG.

[0017] 1 to 3, the blower 1 includes a fan unit 12 and a motor unit 14. The blower 1 further includes a restricting member 7.

[0018] The fan unit 12 and the motor unit 14 are assembled together (see FIG. 2). In a plan view, the motor unit 14 has a smaller outer shape than the fan unit 12. Here, the plan view refers to a view taken along the axis C2 (see FIG. 2) of the centrifugal fan 2 of the fan unit 12. When the fan unit 12 and the motor unit 14 are assembled together, the axis C2 of the centrifugal fan 2 coincides with the axis C4 (see FIG. 2) of the rotation shaft 514 of the motor unit 14.

[0019] The fan unit 12 is a centrifugal fan unit. The fan unit 12 is configured to draw in air along the axis C2 of the centrifugal fan 2 and exhaust air in a direction intersecting the axis C2 (in this embodiment, a direction perpendicular to the axis C2). The orientation of the motor unit 14 relative to the fan unit 12 matches the direction in which the fan unit 12 draws in air. When the fan unit 12 and the motor unit 14 are assembled together, a portion of the motor unit 14 is inserted inside the fan unit 12. The portion of the motor unit 14 includes a portion 66 of the motor case 6, which will be described later.

[0020] The specific configurations of the fan unit 12, the motor unit 14, etc. will be further described below.

[0021] (2.1) Fan Unit The fan unit 12 includes a centrifugal fan 2 and a fan case 3 that rotatably houses the centrifugal fan 2. In this embodiment, both the centrifugal fan 2 and the fan case 3 are made of resin. However, for example, both the centrifugal fan 2 and the fan case 3 may also be made of metal.

[0022] (2.1.1) Centrifugal Fan The centrifugal fan 2 includes a hub 21 and a plurality of blades 23. The centrifugal fan 2 is, for example, a sirocco fan. Hereinafter, the orientation of the first side along the axis C2 of the centrifugal fan 2 will be referred to as the first orientation D1 (see FIG. 2). The orientation of the second side, which is opposite to the orientation of the first side along the axis C2 of the centrifugal fan 2, will be referred to as the second orientation D2 (see FIG. 2).

[0023] The hub 21 has a recessed shape in the first direction D1. When the fan unit 12 and the motor unit 14 are assembled together, a part 66 of the motor case 6 is disposed inside the recess of the hub 21.

[0024] The center of the hub 21 is located closest to the first direction D1 of the entire hub 21. The hub 21 includes a connecting portion 215 that forms the center of the hub 21. The connecting portion 215 is a cylindrical portion into which one end of the rotating shaft 514 in the axial direction (axial center direction) is fitted. The connecting portion 215 opens in the second direction D2. The axis C2 of the centrifugal fan 2 passes through the center of the hub 21 (i.e., the connecting portion 215).

[0025] The hub 21 further includes a bottom wall portion 216, a peripheral wall portion 217, and a flange portion 218. The bottom wall portion 216 is positioned so as to surround the entire circumference of the connecting portion 215 in a plan view. The peripheral wall portion 217 is positioned so as to surround the entire circumference of the bottom wall portion 216 in a plan view. The flange portion 218 is positioned so as to surround the entire circumference of the peripheral wall portion 217 in a plan view. The connecting portion 215, bottom wall portion 216, peripheral wall portion 217, and flange portion 218 of the hub 21 are formed continuously in this order radially outward of the hub 21.

[0026] The bottom wall portion 216 extends radially outward from the outer periphery of the connecting portion 215. The bottom wall portion 216 is inclined as a whole so that the farther away from the axis C2 it is positioned in the second direction D2. The peripheral wall portion 217 extends radially outward from the outer periphery of the bottom wall portion 216. The peripheral wall portion 217 is inclined as a whole so that the farther away from the axis C2 it is positioned in the second direction D2. The flange portion 218 extends radially outward from the outer periphery of the peripheral wall portion 217.

[0027] The inclination of the bottom wall portion 216 is different from the inclination of the peripheral wall portion 217. More specifically, the inclination angle of the peripheral wall portion 217 with respect to the axis C2 is smaller than the inclination angle of the bottom wall portion 216 with respect to the axis C2.

[0028] Each blade 23 is integral with the flange portion 218 of the hub 21. Each blade 23 extends from the flange portion 218 in the first direction D1. Each blade 23 has an arc-shaped outer shape in a plan view. Each blade 23 includes an inner peripheral end portion close to the axis C2 and an outer peripheral end portion far from the axis C2. The multiple blades 23 are arranged at equal intervals in the circumferential direction surrounding the axis C2.

[0029] (2.1.2) Fan Case The fan case 3 has an intake port 34 for drawing in outside air, an outlet port 35 for discharging air toward the outside space, and a flow path 36 connecting the intake port 34 and the outlet port 35. When the centrifugal fan 2 rotates inside the fan case 3, air drawn in through the intake port 34 in the second direction D2 is guided along the flow path 36 to the outlet port 35. In this embodiment, as an example, the intake port 34 has a circular shape, and the outlet port 35 has a rectangular shape.

[0030] The fan case 3 includes a first member 31 that forms one half of the fan case 3 and a second member 32 that forms the other half of the fan case 3. The first member 31 and the second member 32 are fitted together to form the fan case 3. The first member 31 forms the half of the fan case 3 that faces the first direction D1. The second member 32 forms the half of the fan case 3 that faces the second direction D2.

[0031] The intake port 34 is provided in the first member 31. The intake port 34 opens in a first direction D1. The discharge port 35 opens in a direction intersecting the axis C2 (in this embodiment, a direction perpendicular to the axis C2). The discharge port 35 is formed by fitting the first member 31 and the second member 32 together. The flow path 36 has a spiral shape that surrounds the periphery of the centrifugal fan 2. The flow path 36 is formed by fitting the first member 31 and the second member 32 together.

[0032] The fan case 3 further has a connection portion 33 for connecting the motor unit 14. The connection portion 33 is provided on the second member 32. When the first member 31 and the second member 32 are fitted together, the connection portion 33 of the second member 32 faces the air intake port 34 of the first member 31.

[0033] The connection portion 33 includes a wall portion 38 located opposite the intake port 34 and a connection opening 30 surrounded by the wall portion 38 (see FIG. 3 ). The opening 30 is a circular opening facing the intake port 34. The axis C2 of the centrifugal fan 2 is set to pass through the center of the opening 30. The opening 30 is an opening for inserting a part 66 of the motor case 6 that forms the outer shell of the motor unit 14 (i.e., a part of the motor unit 14) into the inside of the fan case 3.

[0034] The wall portion 38 is positioned around the opening 30. The opening 30 is configured as a hole that penetrates the center of the wall portion 38. The wall portion 38 includes an annular portion 380 that surrounds the opening 30. This portion 380 has a surface 380a (see FIG. 3). The surface 380a faces the second direction D2. The surface 380a is an annular, flat surface. When the fan unit 12 and the motor unit 14 are assembled together, the surface 380a of the wall portion 38 is positioned along the motor unit 14 with a small gap therebetween.

[0035] The connecting portion 33 further includes a protrusion 39 positioned to surround the opening 30 and the wall portion 38. The protrusion 39 is a rib-shaped portion provided on the second member 32. The protrusion 39 protrudes in the second direction D2.

[0036] (2.2) Motor Unit The motor unit 14 includes a so-called inner rotor type brushless motor. The motor unit 14 is attached to the fan unit 12. The motor unit 14 has an electric mechanism 5 for rotating the centrifugal fan 2 and a motor case 6 that houses the electric mechanism 5. The electric mechanism 5 includes a rotating shaft 514. In this embodiment, the motor case 6 is made of metal. However, the motor case 6 may also be made of resin.

[0037] (2.2.1) Rotation Shaft The axial direction in which the axis C4 of the rotation shaft 514 extends is the direction along the axis C4 of the rotation shaft 514. The orientation of the first side along the axis C4 of the rotation shaft 514 coincides with the orientation of the first side along the axis C2 of the centrifugal fan 2. In other words, this orientation is the first orientation D1. The orientation of the second side along the axis C4 of the rotation shaft 514 coincides with the orientation of the second side along the axis C2 of the centrifugal fan 2. In other words, this orientation is the second orientation D2. The end of the rotation shaft 514 facing the first orientation D1 is fitted into the connecting portion 215 of the centrifugal fan 2, so that the rotation shaft 514 and the centrifugal fan 2 are fixed so as to be rotatable together.

[0038] (2.2.2) Motor Case The motor case 6 is formed by fitting a first member 61 and a second member 62 together. An opening that is open in the second direction D2 is formed in the first member 61. This opening is closed by a lid-shaped second member 62. A bearing 681 is disposed in the first member 61. A bearing 682 is disposed in the second member 62. The bearing 681 rotatably supports an intermediate portion of the rotating shaft 514 in the axial direction. The bearing 682 rotatably supports an end portion of the rotating shaft 514 in the second direction D2.

[0039] The motor case 6 includes a small diameter portion 63 that forms the end of the motor case 6 in the first direction D1, and a large diameter portion 64 that is continuous with the small diameter portion 63 via a step. The small diameter portion 63 is a cylindrical portion. The large diameter portion 64 is a cylindrical portion that has a larger diameter than the small diameter portion 63. The small diameter portion 63 and the large diameter portion 64 are provided on the first member 61. A portion 66 of the motor case 6 that is inserted inside the fan case 3 includes at least a portion of the small diameter portion 63.

[0040] The large diameter portion 64 has a surface 64a. The surface 64a faces in a first direction D1. The surface 64a is a flat, annular surface. When the fan unit 12 and the motor unit 14 are assembled together, the surface 64a, which constitutes part of the outer surface of the motor case 6, is positioned along the fan unit 12 with a small gap between them.

[0041] (2.2.3) Electric Mechanism The electric mechanism 5 housed in the motor case 6 includes a rotor 51 and a stator 53. The rotor 51 includes a rotor core 511 in which magnets are arranged, and a rotating shaft 514 connected to the rotor core 511. An end of the rotating shaft 514 facing the first direction D1 protrudes outside the motor case 6, and the remaining part of the rotating shaft 514 is housed in the motor case 6.

[0042] The stator 53 includes a stator core 531 and a winding 533 wound around the stator core 531. The stator 53 is disposed radially outward of the rotor 51. The stator 53 is configured to supply a magnetic force that rotates the rotor 51. The stator core 531 includes, for example, a plurality of laminated electromagnetic steel plates. In this embodiment, the rotor 51 and the stator 53 configure a motor.

[0043] The rotor 51 and the stator 53 are disposed inside the small diameter portion 63 of the motor case 6. That is, the rotor 51 and the stator 53 are housed in a part 66 of the motor case 6 that is inserted into the inside of the fan case 3 through the opening 30. That is, the motor unit 14 has the rotor 51 including the rotating shaft 514 that is connected to the centrifugal fan 2, the stator 53 that rotates the rotor 51, bearings 681 and 682 that rotatably support the rotating shaft 514, and the motor case 6 that houses the rotor 51, the stator 53, and the bearing 681.

[0044] The stator 53 is in contact with the inner circumferential surface of the small diameter portion 63 of the motor case 6. Heat transferred from the stator 53 to the motor case 6 can be dissipated, for example, through the outer circumferential surface of the small diameter portion 63. The small diameter portion 63 of the motor case 6 and the stator core 531 may be thermally coupled by direct contact, or may be thermally coupled via a thermally conductive member sandwiched therebetween.

[0045] The electric mechanism 5 further includes a board holder 54, a heat sink 55, an insulating sheet 56, and a circuit board 57. The circuit board 57 is configured to control the supply of electricity to the stator 53.

[0046] The substrate holder 54 is disposed closer to the second direction D2 than the rotor 51 and the stator 53. The substrate holder 54 has an annular shape in a plan view (see FIG. 4A ). The outer diameter of the substrate holder 54 is larger than the outer diameter of the stator 53 and the outer diameter of the small diameter portion 63 of the motor case 6.

[0047] The heat sink 55 is disposed closer to the second direction D2 than the substrate holder 54. The heat sink 55 has an annular shape in plan view (see FIG. 4B ). The outer diameter of the heat sink 55 is larger than the outer diameter of the stator 53 and larger than the outer diameter of the small diameter portion 63 of the motor case 6. In plan view, the substrate holder 54 and the heat sink 55 overlap. The heat sink 55 is preferably made of metal.

[0048] The insulating sheet 56 is disposed closer to the second direction D2 than the heat sink 55. The insulating sheet 56 has a C-shape in plan view (see FIG. 4C ). The outer diameter of the insulating sheet 56 is larger than the outer diameter of the stator 53 and larger than the outer diameter of the small diameter portion 63 of the motor case 6. The inner diameter of the insulating sheet 56 is smaller than the inner diameter of the board holder 54 and smaller than the inner diameter of the heat sink 55. In plan view, the radially outer portion of the insulating sheet 56 overlaps with the board holder 54 and the heat sink 55.

[0049] The circuit board 57 is disposed closer to the second direction D2 than the insulating sheet 56. The circuit board 57 has an annular shape in plan view (see FIG. 4D ). The outer diameter of the circuit board 57 is larger than the outer diameter of the stator 53 and larger than the outer diameter of the small diameter portion 63 of the motor case 6. The inner diameter of the circuit board 57 is smaller than the inner diameter of the board holder 54, the inner diameter of the heat sink 55, and the inner diameter of the insulating sheet 56. In plan view, the radially outer portion of the circuit board 57 overlaps with the board holder 54, the heat sink 55, and the insulating sheet 56.

[0050] The board holder 54, heat sink 55, insulating sheet 56, and circuit board 57 are disposed inside the large diameter portion 64 of the motor case 6. In other words, the board holder 54, heat sink 55, insulating sheet 56, and circuit board 57 are housed in a portion 67 of the motor case 6 that is located closer to the second direction D2 than the portion 66. The portion 67 is a portion of the motor case 6 that is not inserted into the inside of the fan case 3 when the fan unit 12 and the motor unit 14 are assembled together. The board holder 54, heat sink 55, insulating sheet 56, and circuit board 57 are stacked in this order in the second direction D2.

[0051] The heat sink 55 is capable of conducting heat to the portion 67 of the motor case 6. The circuit board 57 is capable of conducting heat to the portion 67 of the motor case 6 via the insulating sheet 56 and the heat sink 55. The heat sink 55 is in contact with the inner circumferential surface of the large diameter portion 64 of the motor case 6. Heat conducted from the circuit board 57 to the motor case 6 via the insulating sheet 56 and the heat sink 55 can be dissipated, for example, through the outer circumferential surface 64b of the large diameter portion 64.

[0052] (2.3) Restricting Member Next, the restricting member 7 will be described with reference to Fig. 5. The restricting member 7 is a member for restricting foreign matter from entering the inside of the bearing 681.

[0053] As shown in FIG. 5 , the bearing 681 includes an inner ring 6811, an outer ring 6812, a plurality of balls 6813 (only one is shown in FIG. 5 ), and two shield members 6814. That is, the bearing 681 is a so-called ball bearing. The two shield members 6814 are members that prevent foreign matter from entering the interior of the bearing 681. In the bearing 681, the inner ring 6811 and the outer ring 6812 rotate relative to each other as the plurality of balls 6813 arranged between them rotate. In the first direction D11, which is the direction in which the inner ring 6811 and the outer ring 6812 are aligned, two shield members 6814 are provided between the inner ring 6811 and the outer ring 6812. Each of the two shield members 6814 is attached to the outer ring 6812. Each of the two shield members 6814 has a small gap between it and the inner ring 6811. That is, the shield member 6814 is located on the outer ring 6812 side in the first direction D11, which is the direction in which the inner ring 6811 and the outer ring 6812 are aligned. Therefore, if the restricting member 7 is not provided, there is a possibility that foreign matter will enter the inside of the bearing 681 through the gap between each shield member 6814 and the inner ring 6811.

[0054] In the blower 1, a restricting member 7 is provided to restrict the intrusion of foreign matter into the inside of the bearing 681. In particular, in the blower 1, the restricting member 7 is provided on the bearing 681.

[0055] The restricting member 7 is formed, for example, in a disk shape that is circular in plan view. The restricting member 7 is attached to the inner ring 6811 as shown in FIG. 5 . That is, the restricting member 7 is located on the inner ring 6811 side in the first direction D11. The restricting member 7 is disposed outward of the shield member 6814. That is, the shield member 6814 and the restricting member 7 are aligned in the second direction D12 that is perpendicular to the first direction D11. In other words, the bearing 681 has a labyrinth structure formed by the shield member 6814 and the restricting member 7. In the present disclosure, "perpendicular" refers not only to a state in which the angle between the two is exactly 90 degrees, but also to a state in which the angle between the two is not 90 degrees within a predetermined range (e.g., ±10 degrees).

[0056] As described above, by providing the restricting member 7 on the inner ring 6811 side of the bearing 681 in the first direction D11, it is possible to close the gap between the shield member 6814 and the inner ring 6811 with the restricting member 7. As a result, it is possible to more effectively restrict the intrusion of foreign matter into the bearing 681 than when no restricting member is provided. Therefore, it is possible to extend the life of the bearing 681.

[0057] In the blower 1, the restricting member 7 attached to the inner ring 6811 is configured not to come into contact with the outer ring 6812 when the rotor 51 rotates. This prevents loss due to the restricting member 7 when the rotor 51 rotates. This makes it possible to suppress a decrease in the output efficiency of the motor unit 14.

[0058] (2.4) Airflow Path As shown in Figure 2, when the fan unit 12 and the motor unit 14 are assembled together, a gap 4 is formed between the fan unit 12 and the motor unit 14. The gap 4 is a small gap formed between the fan case 3 that forms the outer shell of the fan unit 12 and the motor case 6 that forms the outer shell of the motor unit 14. The gap 4 is, for example, about 0.8 mm. The gap 4 is preferably 5 mm or less, and more preferably 3 mm or less.

[0059] Gap 4 is provided so as to communicate with opening 30 of fan case 3 and with the space outside blower 1. Gap 4 constitutes at least a part of air passage 8 that connects the interior of fan case 3 with the space outside through opening 30 of fan case 3. In this embodiment, gap 4 constitutes the entire air passage 8, but gap 4 may also constitute a part of air passage 8.

[0060] The air passage 8 is formed between the wall portion 38 of the fan case 3 and the motor case 6. The wall portion 38 includes a portion 380 that faces the motor case 6 in the axial direction of the rotating shaft 514. A flat surface 380a of the portion 380 and a flat surface 64a of the large-diameter portion 64 of the motor case 6 face each other in the axial direction of the rotating shaft 514. The air passage 8 is formed between the surface 380a of the fan case 3 and the surface 64a of the motor case 6. The width of the air passage 8 in the axial direction of the rotating shaft 514 is, for example, approximately 0.8 mm. The width of the air passage 8 in the axial direction of the rotating shaft 514 is preferably a gap of 5 mm or less, and more preferably a gap of 3 mm or less.

[0061] According to the blower 1 of this embodiment, heat generated by the motor unit 14 during operation can be effectively dissipated by the air flow in the air passage 8 that occurs as the centrifugal fan 2 rotates.

[0062] In other words, when the centrifugal fan 2 rotates, the interior of the fan case 3 becomes negative pressure, causing an air flow from the external space toward the interior of the fan case 3 through the air passage 8. This air flows along the outer periphery of the motor case 6. This air flows along the outer surface of the portion 67 of the motor case 6 that is not inserted inside the fan case 3. This air flows along the outer periphery 64b of the large diameter portion 64 of the motor case 6, and then flows along the surface 64a of the large diameter portion 64. After flowing into the interior of the fan case 3 through the opening 30, this air flows along the outer periphery of the small diameter portion 63 of the motor case 6.

[0063] As described above, the heat generated on the circuit board 57 is transferred to the outer peripheral surface 64b of the large diameter portion 64 of the motor case 6 via the insulating sheet 56 and the heat sink 55. The heat generated on the circuit board 57 is efficiently dissipated by the air flowing along the outer peripheral surface 64b.

[0064] As described above, the heat generated in the stator 53 is transferred to the outer circumferential surface of the small diameter portion 63 of the motor case 6. The heat generated in the stator 53 is efficiently dissipated by the air flowing along the outer circumferential surface of the small diameter portion 63.

[0065] The air flow generated in the air passage 8 may be reversed depending on the structure of the blower 1 and various operating conditions. Even in this case (when air flows from the inside of the fan case 3 to the external space through the air passage 8), heat generated in the stator 53 is efficiently dissipated by the air flowing along the outer circumferential surface of the small diameter portion 63. Heat generated in the circuit board 57 is efficiently dissipated by the air flowing along the outer circumferential surface 64b of the large diameter portion 64.

[0066] (2.5) Mobile Body Fig. 6 schematically illustrates a mobile body 9 according to the first embodiment. The mobile body 9 includes a blower 1, an object to be cooled 91 to be cooled by the blower 1, and a vehicle body 97 on which the blower 1 and the object to be cooled 91 are mounted. The object to be cooled 91 is, for example, a battery 92 mounted on the vehicle body 97.

[0067] The mobile object 9 is, for example, a hybrid four-wheel vehicle. The mobile object 9 includes a plurality of wheels 93, and an engine 94 and a motor 95 for driving and rotating the plurality of wheels 93. The battery 92 is configured to supply power to the motor 95.

[0068] The mobile object 9 is not limited to a hybrid four-wheeled vehicle, but may be another type of four-wheeled vehicle, such as an electric vehicle. The mobile object 9 is not limited to a four-wheeled vehicle, but may be a vehicle (automobile) such as a two-wheeled vehicle or a three-wheeled vehicle. The object to be cooled 91 is not limited to the battery 92, but may be, for example, another part of the mobile object 9 that requires cooling by the blower 1.

[0069] (3) Effect The blower 1 is provided with the restricting member 7 that restricts the intrusion of foreign matter into the inside of the bearing 681. This makes it possible to restrict the intrusion of foreign matter into the inside of the bearing 681 more effectively than in a case where no restricting member is provided. As a result, it is possible to extend the life of the bearing 681.

[0070] In the blower 1, the restricting member 7 is provided on the bearing 681. This makes it possible to further restrict the intrusion of foreign matter into the inside of the bearing 681 compared to when the restricting member is provided somewhere other than the bearing. As a result, it is possible to further extend the life of the bearing 681.

[0071] In the blower 1, the restricting member 7 is attached to the inner ring 6811 of the bearing 681 and does not contact the outer ring 6812. This prevents the restricting member 7 from sliding against the outer ring 6812 when the rotor 51 rotates. Therefore, the output of the rotor 51 is not hindered. In other words, the blower 1 makes it possible to suppress a decrease in the output efficiency of the motor unit 14.

[0072] In the blower 1, the bearing 681 has a shield member 6814. The shield member 6814 is located on the outer ring 6812 side in the first direction D11. The restricting member 7 is located on the inner ring 6811 side in the first direction D11. The shield member 6814 and the restricting member 7 are aligned in the second direction D12. This makes it possible to further restrict the intrusion of foreign matter into the interior of the bearing 681. As a result, it is possible to further extend the life of the bearing 681.

[0073] (4) Modifications The first embodiment is merely one of various embodiments of the present disclosure. Various modifications of the first embodiment can be made depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the first embodiment are listed below. The modifications described below can be applied in appropriate combinations.

[0074] In the first embodiment, the restricting member 7 is provided on one bearing 681 of the two bearings 681 and 682. However, the restricting member 7 may be provided on the other bearing 682, or the restricting member 7 may be provided on both of the two bearings 681 and 682.

[0075] In the first embodiment, two shield members 6814 are provided on the bearing 681. However, the two shield members 6814 may be omitted. This makes it possible to suppress an increase in cost. That is, in this case, it is possible to achieve both suppression of an increase in cost and an extension of the life of the bearing 681.

[0076] In the first embodiment, the restricting member 7 is separate from the bearing 681. However, the restricting member 7 may be integral with the bearing 681. For example, the restricting member 7 may be formed integrally with the inner ring 6811 of the bearing 681.

[0077] (Embodiment 2) A blower 1A according to embodiment 2 will be described with reference to Fig. 7. Fig. 7 is a schematic diagram of the vicinity of a bearing 681 provided in the blower 1A according to embodiment 2. In the blower 1A according to embodiment 2, components similar to those in the blower 1 according to embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted. The blower 1A differs from the blower 1 in that a restricting member 7A is provided on the rotary shaft 514.

[0078] In the blower 1A, the restricting member 7A is provided on the rotary shaft 514 as shown in FIG. 7 . More specifically, the restricting member 7A is formed in a disk shape that is circular in a plan view. The restricting member 7A is attached to the rotary shaft 514 so as to cover the bearing 681. The restricting member 7A is made of, for example, metal. However, the restricting member 7A may also be made of resin.

[0079] Here, it is preferable that the length L1 of the regulating member 7A in the orthogonal direction D22 be equal to or greater than the distance L2 and equal to or less than the distance L3. The distance L2 is the distance from the outer edge 5140 of the rotating shaft 514 to the outer edge 6810 of the bearing 681 in the orthogonal direction D22. The distance L3 is the distance from the outer edge 5140 of the rotating shaft 514 to the outer edge 6310 of the holding portion 631 in the orthogonal direction D22. This makes it possible to more effectively restrict the intrusion of foreign matter into the bearing 681 than when the length L1 of the regulating member 7A is shorter than the distance L2 or when the length L1 of the regulating member 7A is longer than the distance L3. It is preferable that the distance L4 between the bearing 681 and the regulating member 7A in the axial direction D21 of the rotating shaft 514 be as short as possible from the perspective of restricting the intrusion of foreign matter into the bearing 681.

[0080] The length L1 of the restricting member 7A in the orthogonal direction D22 is the length from the outer edge 5140 of the rotating shaft 514 to the tip of the restricting member 7A. The orthogonal direction D22 is a direction perpendicular to the axial direction D21 of the rotating shaft 514. The retaining portion 631 is a part of the motor case 6 and is a portion that retains a bearing case 683 that houses the bearing 681. The bearing case 683 is formed, for example, in a cylindrical shape with both ends in the axial direction D21 of the rotating shaft 514 that are open. In other words, the blower 1A further includes a bearing case 683 that accommodates the bearing 681. The motor case 6 includes the retaining portion 631 that retains the bearing case 683.

[0081] As with the blower 1 according to the first embodiment, the blower 1A according to the second embodiment can achieve both suppression of cost increases and a longer life for the bearing 681. In the blower 1A according to the second embodiment, the restricting member 7A is provided on the rotating shaft 514. This allows for easier assembly compared to when the restricting member 7A is provided on the bearing 681.

[0082] The various configurations described in the second embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first embodiment.

[0083] (Embodiment 3) A blower 1B according to embodiment 3 will be described with reference to Fig. 8. Fig. 8 is a schematic diagram of the vicinity of a bearing 681 provided in blower 1B according to embodiment 3. In blower 1B according to embodiment 3, components similar to those in blower 1 according to embodiment 1 are designated by the same reference numerals, and description thereof will be omitted.

[0084] The fan 1B differs from the fan 1 in that a restricting member 7B is provided on the rotation shaft 514.

[0085] In the blower 1B, the regulating member 7B is provided on the rotary shaft 514 as shown in FIG. 8 . More specifically, the regulating member 7B is formed in a cylindrical shape with one end (the lower end in FIG. 8 ) in the axial direction D31 of the rotary shaft 514 open. The regulating member 7B is attached to the rotary shaft 514 so as to cover the bearing 681. That is, the regulating member 7B has a first portion 711 that forms the bottom surface of the cylinder and a second portion 712 that forms the side surface of the cylinder. The first portion 711 is attached to the rotary shaft 514. The second portion 712 is a portion that extends from the tip of the first portion 711 in the axial direction D31 of the rotary shaft 514. The regulating member 7B is made of, for example, metal. The regulating member 7B may also be made of resin.

[0086] As with the fan 1, the fan 1B can also achieve both cost reduction and a longer life of the bearing 681. In the fan 1B, the restricting member 7B is formed in a cylindrical shape. This makes it possible to more reliably restrict the intrusion of foreign matter into the interior of the bearing 681 in the fan 1B than in the restricting member 7A. As a result, the life of the bearing 681 can be further extended.

[0087] The various configurations described in the third embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first and second embodiments.

[0088] (Embodiment 4) A blower 1C according to embodiment 4 will be described with reference to Fig. 9. Fig. 9 is a schematic diagram of the vicinity of a bearing 681 provided in blower 1C according to embodiment 4. In blower 1C according to embodiment 4, components similar to those in blower 1 according to embodiment 1 are designated by the same reference numerals, and description thereof will be omitted.

[0089] The fan 1C differs from the fan 1 in that a restricting member 7C is provided on a bearing case 683.

[0090] In the blower 1C, the regulating member 7C is provided in a bearing case 683. The bearing case 683 is a case that houses the bearing 681 and is formed in a cylindrical shape with both ends in the axial direction D41 of the rotating shaft 514 open. That is, the blower 1C further includes a bearing case 683 that houses the bearing 681. The regulating member 7C is attached to the bearing case 683 so as to cover the opening at one end side (the upper side in FIG. 9 ) of the bearing case 683. The regulating member 7C is formed in a disk shape that is circular in plan view. The regulating member 7C is made of, for example, metal. The regulating member 7C may also be made of resin. The regulating member 7C is, for example, integral with the rotating shaft 514. However, the regulating member 7C may also be separate from the rotating shaft 514.

[0091] Here, it is preferable that the gap G1 between the rotary shaft 514 and the restricting member 7C be as narrow as possible in order to restrict the intrusion of foreign matter into the inside of the bearing 681.

[0092] As with the fan 1, the fan 1C can also achieve both suppression of cost increases and a longer life for the bearing 681. In the fan 1C, the restricting member 7C can be formed integrally with the bearing case 683. As a result, the ease of assembly can be improved.

[0093] The various configurations described in the fourth embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first to third embodiments.

[0094] Fifth Embodiment A blower 1D according to a fifth embodiment will be described with reference to Fig. 10. Fig. 10 is a schematic diagram of the vicinity of a bearing 681 provided in the blower 1D according to the fifth embodiment. In the blower 1D according to the fifth embodiment, the same components as those in the blower 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0095] The blower 1D differs from the blower 1 in that a restricting member 7D is provided on the centrifugal fan 2.

[0096] In blower 1D, regulating member 7D is provided on centrifugal fan 2. More specifically, regulating member 7D is integral with centrifugal fan 2. Specifically, regulating member 7D is formed integrally with centrifugal fan 2 from the inner surface of bottom wall portion 216 of hub 21 toward bearing 681. As described above, centrifugal fan 2 is made of resin, and therefore regulating member 7D, which is integral with centrifugal fan 2, is also made of resin.

[0097] The restricting member 7D includes a plurality of (two in the illustrated example) annular portions 721, 722. Each of the plurality of annular portions 721, 722 is formed in a circular ring shape when viewed from a plane in the axial direction D51 of the rotating shaft 514. The plurality of annular portions 721, 722 are arranged concentrically around the rotating shaft 514. The restricting member 7D covers the bearing 681 in the axial direction D51 of the rotating shaft 514.

[0098] As with the fan 1, the fan 1D also makes it possible to suppress cost increases and extend the life of the bearing 681. In the fan 1D, the restricting member 7D is integral with the centrifugal fan 2, which improves assembly efficiency.

[0099] The restricting member 7D may omit the annular portion 722 located on the inside. That is, it is sufficient that the restricting member 7D is provided with at least the annular portion 721 located on the outside. The restricting member 7D may be separate from the centrifugal fan 2. In this case, the restricting member 7D may be made of resin or metal. The various configurations described in the fifth embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first to fourth embodiments.

[0100] Sixth Embodiment A blower 1E according to a sixth embodiment will be described with reference to Fig. 11. Fig. 11 is a schematic diagram of the vicinity of a bearing 681 provided in the blower 1E according to the sixth embodiment. In the blower 1E according to the sixth embodiment, the same components as those in the blower 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0101] The blower 1E differs from the blower 1 in that a restricting member 7E is provided on the centrifugal fan 2.

[0102] In the blower 1E, the regulating member 7E is provided on the centrifugal fan 2. More specifically, the regulating member 7E is integral with the centrifugal fan 2. Specifically, the regulating member 7E is formed integrally with the centrifugal fan 2 from the inner surface of the bottom wall portion 216 of the hub 21 toward the bearing 681. As described above, the centrifugal fan 2 is made of resin. Therefore, the regulating member 7E that is integral with the centrifugal fan 2 is also made of resin.

[0103] The restricting member 7E is formed in a cylindrical shape with one end (the lower end in FIG. 11 ) opened in the axial direction D61 of the rotating shaft 514. The side surface of the cylindrical restricting member 7E is located outward from the side surface of the bearing case 683 that houses the bearing 681 in the orthogonal direction D62 that is orthogonal to the axial direction D61 of the rotating shaft 514. In other words, the restricting member 7E is located on the opposite side of the bearing case 683 from the rotating shaft 514 side in the orthogonal direction D62 that is orthogonal to the axial direction D61 of the rotating shaft 514. As a result, the bearing 681 and the bearing case 683 are covered by the restricting member 7E in the axial direction D61 of the rotating shaft 514.

[0104] The bearing case 683 that houses the bearing 681 is formed in a cylindrical shape that is open at both ends in the axial direction D61 of the rotating shaft 514. That is, the blower 1E further includes a bearing case 683 that houses the bearing 681.

[0105] As with the fan 1, the fan 1E also makes it possible to suppress cost increases and extend the life of the bearing 681. The restricting member 7E is integrated with the centrifugal fan 2. This improves assembly efficiency.

[0106] The number of restricting members 7E is not limited to one, and multiple restricting members 7E may be provided along the orthogonal direction D62. The various configurations described in the sixth embodiment can be adopted in appropriate combination with the various configurations (including modified examples) described in the first to fifth embodiments.

[0107] (Aspects) The present specification discloses the following aspects.

[0108] A blower (1; 1A to 1E) according to a first aspect includes a fan unit (12) and a motor unit (14). The motor unit (14) is attached to the fan unit (12). The fan unit (12) has a centrifugal fan (2) and a fan case (3). The fan case (3) houses the centrifugal fan (2). The motor unit (14) has a rotor (51), a stator (53), a bearing (681), and a motor case (6). The rotor (51) includes a rotating shaft (514) connected to the centrifugal fan (2). The stator (53) rotates the rotor (51). The bearing (681) rotatably supports the rotating shaft (514). The motor case (6) houses the rotor (51), the stator (53), and the bearing (681). The blower (1; 1A to 1E) further includes a restricting member (7; 7A to 7E) that restricts foreign matter from entering the inside of the bearing (681).

[0109] According to this aspect, it is possible to suppress an increase in costs and extend the life of the bearing (681).

[0110] The blower (1) according to the second aspect is the same as the first aspect, except that the restricting member (7) is provided on the bearing (681).

[0111] According to this aspect, it is possible to further extend the life of the bearing (681).

[0112] A blower (1) according to a third aspect is the second aspect, wherein the bearing (681) includes an inner ring (6811), an outer ring (6812), and a shield member (6814). The shield member (6814) prevents foreign matter from entering the inside of the bearing (681). The shield member (6814) is located on the outer ring (6812) side in a first direction (D11) in which the inner ring (6811) and the outer ring (6812) are aligned. The regulating member (7) is located on the inner ring (6811) side in the first direction (D11). The shield member (6814) and the regulating member (7) are aligned in a second direction (D12) perpendicular to the first direction (D11).

[0113] According to this aspect, since the restricting member (7) does not contact the outer ring (6812), it is possible to suppress a decrease in the output efficiency of the motor unit (14).

[0114] The blower (1A) according to a fourth aspect is the blower of any one of the first to third aspects, wherein a restricting member (7A) is provided on the rotary shaft (514).

[0115] According to this aspect, it is possible to improve the ease of assembly.

[0116] The blower (1A) according to a fifth aspect is the fourth aspect, further comprising a bearing case (683) that houses a bearing (681). The motor case (6) includes a holding portion (631) that holds the bearing case (683). The length (L1) of the regulating member (7A) in an orthogonal direction (D22) perpendicular to the axial direction (D21) of the rotating shaft (514) is equal to or greater than a distance L2 and equal to or less than a distance L3. The distance L2 is the distance from the outer edge (5140) of the rotating shaft (514) to the outer edge (6810) of the bearing (681) in the orthogonal direction (D22). The distance L3 is the distance from the outer edge (5140) of the rotating shaft (514) to the outer edge (6310) of the holding portion (631) in the orthogonal direction (D22).

[0117] According to this aspect, it is possible to extend the life of the bearing (681) compared to when the length (L1) of the restricting member (7A) is equal to or less than the distance L2 or equal to or greater than the distance L3.

[0118] A blower (1B) according to a sixth aspect is the blower (1B) of any one of the first to fifth aspects, wherein the restricting member (7B) includes a first portion (711) and a second portion (712). The first portion (711) is a portion attached to the rotating shaft (514). The second portion (712) is a portion extending from the tip of the first portion (711) in the axial direction (D31) of the rotating shaft (514).

[0119] According to this aspect, it is possible to extend the life of the bearing (681) compared to when the restricting member (7B) is only the first portion (711).

[0120] The blower (1C) according to a seventh aspect is the blower (1C) of any one of the first to sixth aspects, further including a bearing case (683) that houses the bearing (681). The restricting member (7C) is provided in the bearing case (683).

[0121] According to this embodiment, it can be formed integrally with the bearing case (683), which results in improved assembly efficiency.

[0122] A blower (1D; 1E) according to an eighth aspect is the blower of any one of the first to seventh aspects, wherein a restricting member (7D; 7E) is provided on the centrifugal fan (2).

[0123] According to this aspect, the restricting member (7D, 7E) can be formed integrally with the centrifugal fan (2), thereby improving the ease of assembly.

[0124] A blower (1D; 1E) according to a ninth aspect is the blower of the eighth aspect, wherein the restricting member (7D; 7E) is integral with the centrifugal fan (2).

[0125] According to this aspect, it is possible to improve the ease of assembly.

[0126] The blower (1E) according to a tenth aspect is the ninth aspect, further including a bearing case (683) that houses the bearing (681). The restricting member (7E) is located on the opposite side of the bearing case (683) from the rotating shaft (514) in an orthogonal direction (D62) orthogonal to the axial direction (D61) of the rotating shaft (514).

[0127] According to this aspect, it is possible to further extend the life of the bearing (681).

[0128] A blower (1; 1A to 1E) according to an eleventh aspect is the blower (1; 1A to 1E) of any one of the first to tenth aspects, wherein the bearing (681) is a ball bearing.

[0129] A moving body (9) according to a twelfth aspect includes a blower (1; 1A-1E) according to any one of the first to eleventh aspects, an object to be cooled (91), and a vehicle body (97). The object to be cooled (91) is cooled by the blower (1; 1A-1E). The vehicle body (97) carries the blower (1; 1A-1E) and the object to be cooled (91).

[0130] According to this aspect, since the blower (1; 1A to 1E) of any one of the first to eleventh aspects is provided, it is possible to achieve both suppression of cost increases and extension of the life of the bearing (681).

[0131] The configurations according to the second to eleventh aspects are not essential for the blower (1) and may be omitted as appropriate.

[0132] The blower and moving body according to the present disclosure can be widely used in electrical equipment, vehicles, and the like.

[0133] DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C, 1D, 1E Blower 2 Centrifugal fan 3 Fan case 6 Motor case 7, 7A, 7B, 7C, 7D, 7E Regulating member 9 Moving body 12 Fan unit 14 Motor unit 51 Rotor 53 Stator 91 Object to be cooled 97 Vehicle body 514 Rotating shaft 631 Holding portion 681, 682 Bearing 683 Bearing case 711 First portion 712 Second portion 5140, 6310, 6810 Outer edge 6811 Inner ring 6812 Outer ring 6814 Shield member D11 First direction D12 Second direction D21, D31, D41, D51, D61 Axial direction D22, D62 Orthogonal direction L1 Length L2, L3, L4 distance

Claims

1. A blower comprising: a fan unit; and a motor unit attached to the fan unit, wherein the fan unit has a centrifugal fan and a fan case that houses the centrifugal fan, and the motor unit has: a rotor including a rotating shaft connected to the centrifugal fan, a stator that rotates the rotor, a bearing that rotatably supports the rotating shaft, and a motor case that houses the rotor, the stator, and the bearing, and further comprising a restricting member that restricts foreign matter from entering the inside of the bearing.

2. The blower according to claim 1, wherein the restricting member is provided on the bearing.

3. A blower as described in claim 2, wherein the bearing includes an inner ring, an outer ring, and a shielding member that prevents foreign matter from entering the interior of the bearing, the shielding member being located on the outer ring side in a first direction in which the inner ring and the outer ring are aligned, the regulating member being located on the inner ring side in the first direction, and the shielding member and the regulating member being aligned in a second direction perpendicular to the first direction.

4. The blower according to any one of claims 1 to 3, wherein the restricting member is provided on the rotary shaft.

5. A blower as described in claim 4, further comprising a bearing case that houses the bearing, wherein the motor case includes a retaining portion that retains the bearing case, and the length of the regulating member in an orthogonal direction perpendicular to the axial direction of the rotating shaft is equal to or greater than the distance from the outer edge of the rotating shaft to the outer edge of the bearing in the orthogonal direction, and is equal to or less than the distance from the outer edge of the rotating shaft to the outer edge of the retaining portion in the orthogonal direction.

6. A blower according to any one of claims 1 to 3, wherein the regulating member has a first portion attached to the rotating shaft and a second portion extending from the tip of the first portion in the axial direction of the rotating shaft.

7. The blower according to any one of claims 1 to 3, further comprising a bearing case that houses the bearing, wherein the restricting member is provided on the bearing case.

8. The blower according to any one of claims 1 to 3, wherein the restricting member is provided on the centrifugal fan.

9. The blower according to claim 8, wherein the restricting member is integral with the centrifugal fan.

10. The blower according to claim 9, further comprising a bearing case that houses the bearing, and the restricting member is located on the opposite side of the bearing case from the rotating shaft in a direction perpendicular to the axial direction of the rotating shaft.

11. The blower according to any one of claims 1 to 3, wherein the bearing is a ball bearing.

12. A moving body comprising: a blower according to any one of claims 1 to 3; an object to be cooled by the blower; and a vehicle body on which the blower and the object to be cooled are mounted.

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