JP2022062616A - Motor, blower, and air conditioner - Google Patents

Abstract

To provide a motor that suppresses water from entering the inside of a motor body.SOLUTION: A motor 10 includes a casing 42, a shaft 60, and a cap 64. The cap 64 includes a cylindrical portion 66 that surrounds a portion of the shaft 60 and is secured to the shaft 60. The casing 42 includes a first wall 46 and a first surface 80. The first wall 46 is located at least above the shaft 60 and surrounds at least a portion around the shaft 60. The first surface 80 extends in a radial direction of the shaft 60 outwardly from the base of the first wall 46 and faces the end surface of the cylindrical portion 66 of the cap 64. The first surface 80 has a plurality of guide grooves including a first inclined groove 81 and a second inclined groove 82. The height position of the left end 81a of the first inclined groove 81 is lower than the height position of the right end 81b of the first inclined groove 81. The height position of the right end 82b of the second inclined groove 82 is lower than the height position of the left end 82a of the second inclined groove 82.SELECTED DRAWING: Figure 5

Description

Regarding motors, blowers, and air conditioners.

As described in Patent Document 1 (Japanese Unexamined Patent Publication No. 2020-96406), it is an outer rotor type motor, which is a tubular member surrounding a boundary portion between a motor body and a shaft, and is a waterproof cap fixed to the shaft. Motors equipped with are known.

In a motor in which the rotation axis of the shaft is arranged along the horizontal direction, the waterproof cap alone fixed to the shaft is insufficient in waterproofness, and water may enter the inside of the motor body.

The motor of the first aspect includes a casing, a shaft, and a cap. The shaft rotates about the axis of rotation. The cap has a cylindrical portion that surrounds a portion of the shaft and is secured to the shaft. The casing has a first wall and a first surface. The first wall surrounds at least a portion of the perimeter of the shaft. The first surface extends radially outwardly from the base of the first wall and faces the end surface of the cylindrical portion of the cap. The first surface has a plurality of guide grooves including a first inclined groove and a second inclined groove. The first viewpoint is a viewpoint of looking at the first surface from the side of the cap so that the guide groove is located above the shaft. In the first viewpoint, the first wall is located at least above the shaft. In the first viewpoint, the height position of the left end portion of the first inclined groove is lower than the height position of the right end portion of the first inclined groove. In the first viewpoint, the height position of the right end of the second inclined groove is lower than the height position of the left end of the second inclined groove.

In the motor of the first aspect, even if the shaft of the motor is arranged along the horizontal direction, the water flowing downward along the first surface is released in the left-right direction by the first inclined groove and the second inclined groove. , Water is suppressed from entering the inside of the motor.

The motor of the second aspect is the motor of the first aspect, and the first inclined groove and the second inclined groove are connected to each other.

In the motor of the second aspect, the water flowing downward along the first surface is suppressed from flowing between the first inclined groove and the second inclined groove and reaching the first wall. The ingress of water into the interior is suppressed.

The motor of the third viewpoint is a motor of the first viewpoint or the second viewpoint, and in the first viewpoint, the right end portion of the first inclined groove and the left end portion of the second inclined groove are above the shaft. To position.

In the motor of the third aspect, the water flowing downward along the first surface above the shaft is effectively released in the left-right direction by the first inclined groove and the second inclined groove, so that water enters the inside of the motor. Is suppressed.

The motor of the fourth viewpoint is a motor of any one of the first to third viewpoints, and in the first viewpoint, the left end portion of the first inclined groove is the first from the horizontal center position of the first wall. It is located on the left side of the horizontal dimension of one wall, at a distance of one-fourth of the horizontal dimension. In the first viewpoint, the right end of the second inclined groove is a quarter distance from the horizontal center position of the first wall to the horizontal dimension of the first wall, to the right of the position away from the right side. Located in.

In the motor of the fourth aspect, the range occupied by the first inclined groove and the second inclined groove is sufficiently secured in the horizontal direction, so that the water flowing downward along the first surface is the first inclined groove and the second inclined groove. The groove effectively escapes in the left-right direction and prevents water from entering the motor.

The motor of the fifth viewpoint is a motor of any one of the first to fourth viewpoints, and in the first viewpoint, the left end portion of the first inclined groove is from the left end portion in the horizontal direction of the first wall. Is also located on the left side. In the first viewpoint, the right end of the second inclined groove is located on the right side of the horizontal right end of the first wall.

In the motor of the fifth aspect, the water flowing downward along the first surface is effectively released in the left-right direction by the first inclined groove and the second inclined groove, so that the infiltration of water into the motor is suppressed. Will be done.

The motor of the sixth aspect is the motor of any one of the first to fifth aspects, and the guide groove is formed by a plurality of convex portions protruding from the first surface.

In the motor of the sixth aspect, the guide groove has a shape capable of effectively allowing water flowing downward along the first surface to escape in the left-right direction.

The motor of the seventh aspect is any one of the first to fifth aspects, and the guide groove is formed by a plurality of recesses formed on the first surface.

In the motor of the seventh aspect, the guide groove has a shape capable of effectively allowing water flowing downward along the first surface to escape in the left-right direction.

The motor according to the eighth aspect is the motor according to any one of the first to seventh aspects, and the width of the guide groove is 0.1 mm to 2.0 mm. The depth of the guide groove is 0.1 mm to 0.5 mm.

In the motor of the eighth aspect, the guide groove has a shape capable of effectively allowing water flowing downward along the first surface to escape in the left-right direction.

The motor according to the ninth aspect is the motor according to any one of the first to eighth aspects, and the first surface has a plurality of first inclined grooves and a plurality of second inclined grooves. The plurality of first inclined grooves are arranged along the vertical direction in the first viewpoint. The plurality of second inclined grooves are arranged along the vertical direction in the first viewpoint.

In the motor of the ninth aspect, the provision of the plurality of first inclined grooves and the plurality of second inclined grooves effectively suppresses the intrusion of water into the motor through the first wall.

The motor of the tenth viewpoint is the motor of the ninth viewpoint, and in the first viewpoint, the number of guide grooves located above the shaft is larger than the number of guide grooves located above both ends in the left-right direction of the first wall. many.

In the motor of the tenth aspect, the number of guide grooves can be appropriately set according to the radial dimension of the first surface and the dimensions and angles of the first inclined groove and the second inclined groove.

The motor of the eleventh viewpoint is a motor of the ninth viewpoint or the tenth viewpoint, and the distance between the plurality of guide grooves arranged along the vertical direction in the first viewpoint is 0.5 mm to 2.0 mm.

In the motor of the eleventh aspect, the plurality of guide grooves have an interval that allows water flowing downward along the first surface to be effectively released in the left-right direction.

The motor according to the twelfth aspect is the motor according to any one of the first to eleventh aspects, and the distance between the end surface of the cylindrical portion and the first surface is 0.5 mm to 5.0 mm.

In the motor of the twelfth aspect, even if the shaft of the motor is arranged along the horizontal direction, water is suppressed from entering the inside of the motor body.

The motor of the thirteenth aspect is the motor of any one of the first to the twelfth aspects, and the first wall has a plurality of steps formed along the radial direction of the shaft.

In the motor of the thirteenth viewpoint, by providing a plurality of steps on the first wall, water flowing downward along the first surface travels on the surface of the first wall, overcomes the first wall, and water inside the motor. Is effectively suppressed from invading.

The motor according to the fourteenth aspect is the motor according to any one of the first to thirteenth aspects, and the cylindrical portion surrounds at least a part of the first wall.

In the motor of the 14th aspect, even if the shaft of the motor is arranged along the horizontal direction, water is suppressed from entering the inside of the motor body.

The motor of the fifteenth aspect is the motor of any one of the first to the fourteenth aspects, and the casing further has a second wall located radially outside the shaft with respect to the first wall. The first surface is located between the first wall and the second wall.

In the motor of the fifteenth aspect, the second wall suppresses the arrival of water on the first surface, so that the infiltration of water into the motor body is suppressed.

The motor of the 16th aspect is the motor of the 15th aspect, and the second wall surrounds at least a part around the cap.

In the motor of the 16th aspect, the second wall suppresses the arrival of water on the first surface, so that the infiltration of water into the motor body is suppressed.

The motor of the 17th aspect is the motor of the 15th aspect or the 16th aspect, and the 2nd wall surrounds the circumference of the cap and has a drainage groove. The drainage ditch is formed below the cap in the first viewpoint.

In the motor of the 17th aspect, the drainage ditch penetrates into the space between the cap and the first surface, and the water flowing to the lower end of the first surface is effectively discharged.

The motor of the 18th aspect is any one of the 1st to 17th aspects, and further includes a rotor and a stator arranged inside the rotor. The casing houses the rotor and stator. The shaft is connected to the rotor.

In the motor of the eighteenth aspect, even if the shaft of the motor is arranged along the horizontal direction, water is suppressed from entering the inside of the motor body.

The blower according to the 19th aspect includes a motor according to any one of the 1st to 18th aspects and a fan driven by the motor. The fan is fixed to the shaft of the motor. The motor is mounted so that the axis of rotation of the shaft is along the horizontal direction and the guide groove is located above the shaft.

In the blower of the 19th viewpoint, it is possible to suppress the occurrence of a defect due to the intrusion of water into the motor body.

The 20th aspect air conditioner includes a housing, a heat exchanger, and a 19th aspect blower. The heat exchanger is housed inside the housing and exchanges heat between the refrigerant and the air. The blower is housed inside the housing and blows the air that has passed through the heat exchanger.

In the air conditioner of the twentieth aspect, it is possible to suppress the occurrence of a defect due to the intrusion of water into the motor body of the blower.

It is an external view of the air conditioner 200. It is a schematic sectional drawing of the outdoor unit 220. It is a vertical sectional view of a motor 10. It is an external view of the casing 42 when the cap 64 is attached to the shaft 60. It is an external view of the casing 42 when the cap 64 is not attached to the shaft 60. It is a front view of the casing 42. It is an enlarged view around the 1st inclined groove 81 and the 2nd inclined groove 82. It is a front view of the casing 42 in the modification A1 and A2. It is an enlarged view around the 1st inclined groove 81 and the 2nd inclined groove 82. It is a front view of the casing 42 in the modification A3. It is an enlarged view around the 1st inclined groove 81 and the 2nd inclined groove 82. It is a front view of the casing 42 in the modification A4. It is an enlarged view around the 1st inclined groove 81 and the 2nd inclined groove 82. It is a front view of the casing 42 in the modification B. It is an enlarged view around the 1st inclined groove 81 and the 2nd inclined groove 82. FIG. 3 is an external view of the casing 42 in the modified example E when the cap 64 is not attached to the shaft 60. It is an enlarged view around the second wall 48.

(1) Configuration of Air Conditioning Device 200 The motor 10 according to the present embodiment is used for the blower 100. The blower 100 is used for the air conditioner 200. As shown in FIG. 1, the air conditioner 200 mainly has an indoor unit 210 mounted on a wall surface or the like in the room and an outdoor unit 220 installed outdoors. The indoor unit 210 and the outdoor unit 220 are connected to each other via a refrigerant pipe 230, thereby forming a refrigerant circuit of the air conditioner 200. The air conditioner 200 performs cooling operation, heating operation, and the like in the space where the indoor unit 210 is installed.

In the present embodiment, the outdoor unit 220 of the air conditioner 200 has a blower 100. As shown in FIG. 2, the outdoor unit 220 mainly has a blower 100, a housing 102, a heat exchanger 104, a compressor 106, an internal pipe, and a control unit. The housing 102 houses a blower 100, a partition plate 103, a heat exchanger 104, a bell mouth 105, a compressor 106, and the like. The internal pipe is a part of the refrigerant circuit of the air conditioner 200, and is a pipe through which the refrigerant circulating in the refrigerant circuit flows. The control unit is a microcomputer having a CPU, a memory, and the like. The control unit controls the motor 10 and the like of the blower 100.

The partition plate 103 divides the space inside the housing 102 into a blower chamber 102a and a machine chamber 102b. The blower 100, the heat exchanger 104, and the bell mouth 105 are arranged in the blower chamber 102a. The compressor 106 and the control unit are arranged in the machine room 102b.

The compressor 106 compresses the refrigerant circulating in the refrigerant circuit of the air conditioner 200. The refrigerant compressed by the compressor 106 is sent to the heat exchanger 104 of the outdoor unit 220 during the cooling operation, and is sent to the heat exchanger of the indoor unit 210 during the heating operation.

The heat exchanger 104 exchanges heat between the refrigerant and air. The heat exchanger 104 is composed of, for example, a heat transfer tube that is folded back at both ends in the longitudinal direction thereof and fins attached to the heat transfer tube. The heat transfer tube is a part of the refrigerant circuit of the air conditioner 200, and is a tube through which the refrigerant circulating in the refrigerant circuit flows. The heat exchanger 104 exchanges heat between the refrigerant flowing inside the heat transfer tube and the air passing through the fins. The heat exchanger 104 functions as a condenser (radiator) during the cooling operation and as an evaporator (heat absorber) during the heating operation.

The blower 100 mainly includes a motor 10 and a fan 90. The fan 90 is a propeller fan driven by a motor 10 to send air in a predetermined direction. The fan 90 forms an air flow to facilitate heat exchange by the heat exchanger 104. The air flow outside the housing 102 is sucked into the air blowing chamber 102a inside the housing 102 by the air flow formed by the rotation of the fan 90. In this process, the air passes through the heat exchanger 104 to exchange heat with the refrigerant, and then passes through the bell mouth 105 and is discharged to the outside of the housing 102.

(2) Configuration of Motor 10 As shown in FIG. 3, the motor 10 is mainly composed of a rotor 20, a stator 30, a motor cover 40, a connection plate 50, and a shaft 60. The motor 10 is an outer rotor type motor. In other words, the stator 30 is located inside the rotor 20. In FIG. 3, the fan 90 is schematically shown. The motor 10 is arranged so that the rotating shaft 62 of the shaft 60 is aligned in the horizontal direction.

In the following description, the "axial direction" indicates the direction along the rotating shaft 62 of the shaft 60, and the "diametrical direction" indicates the radial direction of the shaft 60 centered on the rotating shaft 62 of the shaft 60.

(2-1) Stator 30
The stator 30 mainly has a stator core 31, a coil 32, and an insulator 33. The stator core 31 is formed by laminating steel plates, which are soft magnetic materials having conductivity. The stator core 31 has a plurality of teeth. The coil 32 is formed by winding a copper wire coated with an insulating material such as enamel resin around a tooth of a stator core 31. The insulator 33 is made of an insulating resin material. The insulator 33 is provided between the stator core 31 and the coil 32. The insulator 33 insulates between the stator core 31 and the coil 32 so that the current flowing through the coil 32 is not transmitted to the stator core 31. The stator core 31 has a through hole through which the shaft 60 penetrates along the axial direction.

(2-2) Rotor 20
The rotor 20 mainly has a cylindrical main body 21, a plurality of magnets 22, a back yoke 26, and a boscore 24. The rotor 20 is formed by, for example, resin casting. In the resin casting, the resin is poured into the cavity formed by the mold with the plurality of magnets 22, the back yoke 26, and the boss core 24 housed in the cavity. Then, the rotor 20 is molded by curing the resin by heating or cooling.

The rotor 20 is rotatably arranged around the rotation shaft 62 of the shaft 60 on the radial outer side of the stator 30. A gap is formed between the inner peripheral surface of the main body 21 of the rotor 20 and the outer peripheral surface of the stator core 31 of the stator 30.

A plurality of magnets 22 are arranged side by side in the circumferential direction of the main body 21 on the main body 21. The back yoke 26 is located radially outside the magnet 22. The body score 24 engages with the shaft 60 and connects the rotor 20 and the shaft 60. As a result, the rotor 20 is integrated with the shaft 60 and rotates around the stator 30.

(2-3) Motor cover 40
The motor cover 40 accommodates the stator 30, the rotor 20, and the connection plate 50. The motor cover 40 is fixed to the housing 102 of the outdoor unit 220 via a vibration isolator. The anti-vibration member is molded of rubber or the like and has a function of absorbing the vibration of the motor 10. The motor cover 40 is made of, for example, BMC (Bulk Molding Compound), which is a thermosetting resin material. BMC is a resin material containing an unsaturated polyester resin as a main component and a flame retardant such as aluminum hydroxide added.

As shown in FIG. 3, the motor cover 40 is mainly composed of a casing 42 and a casing cover 44. The casing 42 and the casing cover 44 are connected to each other by bolts or the like. A part of the stator 30, the rotor 20, and the shaft 60 is housed in the space surrounded by the casing 42 and the casing cover 44.

The stator 30 is fixed to the casing 42. The casing 42 is the axial end of the motor 10 and covers the end on the stator 30 side. The casing 42 surrounds the rotor 20 so as to face the radial outer side surface of the rotor 20. A bearing 41 for supporting the shaft 60 is attached to the casing 42. The bearing 41 is, for example, a metal ball bearing. The casing cover 44 is an axial end portion of the motor 10 and covers the end portion on the boss core 24 side.

(2-4) Wiring plate 50
The connection plate 50 is arranged inside the motor cover 40 and at one end of the stator 30 in the axial direction. The connection plate 50 is connected to the leader wires at the start and end of winding of the coil 32 of the stator 30. The connection plate 50 is connected to an external power source or the like via a lead wire.

(2-5) Shaft 60
The shaft 60 is a metal columnar member. As shown in FIG. 3, the shaft 60 is connected to the fan 90 at one end in the axial direction and to the body score 24 of the rotor 20 at the other end in the axial direction. The shaft 60 is rotatably supported with respect to the motor cover 40 by a bearing 41 fixed to the motor cover 40.

The stator 30 generates a magnetic field for rotating the rotor 20 by the electric power supplied from the outside to the coil 32 via the connection plate 50. The rotor 20 is rotated by the magnetic field generated from the stator 30. The shaft 60 connected to the rotor 20 rotates about a rotation shaft 62 along the axial direction. The motor 10 supports the shaft 60 and transmits a rotational force to the fan 90 via the shaft 60. As a result, the motor 10 rotates the fan 90 around the rotating shaft 62 of the shaft 60.

A cap 64 is attached to the shaft 60. The cap 64 has a cylindrical portion 66 that surrounds at least a portion of the shaft 60. The cap 64 is fixed to the shaft 60 so as not to come into contact with the casing 42 and to face the casing 42.

(3) Configuration of Casing 42 The detailed shape of the casing 42 will be described. As shown in FIG. 3, the casing 42 has a first wall 46, a second wall 48, and a first surface 80. The first wall 46 and the second wall 48 are formed on the main surface 42a, which is the surface of the casing 42 that can be visually recognized when the motor 10 is viewed from the side of the cap 64 along the axial direction. The main surface 42a is perpendicular to the axial direction. The first wall 46 and the second wall 48 are convex portions protruding from the main surface 42a. The first surface 80 is a part of the main surface 42a.

The first wall 46 surrounds at least a portion of the periphery of the shaft 60 and is located at least above the shaft 60. In this embodiment, as shown in FIG. 5, the first wall 46 is an annular protrusion that surrounds the entire circumference of the shaft 60. The first wall 46 has a base 46a that connects to the main surface 42a. The axial end face of the bearing 41 is exposed inside the first wall 46 in the radial direction. The first wall 46 has one step 84 formed along the radial direction of the shaft 60.

The second wall 48 is located radially outward of the first wall and surrounds at least a portion around the cap 64. In this embodiment, as shown in FIG. 4, the second wall 48 is an annular protrusion that surrounds the entire circumference of the cylindrical portion 66 of the cap 64. The second wall 48 has a base 48a that connects to the main surface 42a.

The first surface 80 is a main surface 42a located between the first wall 46 and the second wall 48 in the radial direction. The first surface 80 extends radially outward from the base 46a of the first wall 46 and extends radially inward from the base 48a of the second wall 48. The first surface 80 faces the end surface 66a of the cylindrical portion 66 of the cap 64. A gap is formed between the end surface 66a of the cylindrical portion 66 and the first surface 80. The horizontal distance between the end surface 66a and the first surface 80 can be appropriately set, and may be set to, for example, 0.5 mm to 5.0 mm.

As shown in FIGS. 5 and 6, the first surface 80 has a plurality of guide grooves including a first inclined groove 81 and a second inclined groove 82. The guide groove is a linear convex portion that protrudes from the first surface 80 and extends along a predetermined direction. The number of the first inclined grooves 81 is the same as the number of the second inclined grooves 82. In the present embodiment, the guide groove is composed of one first inclined groove 81 and one second inclined groove 82. The dimensions of the guide groove can be appropriately set according to various conditions such as the radial dimension of the first surface 80. For example, the width of the guide groove may be set to 0.1 mm to 2.0 mm, and the height of the guide groove (height when the first surface 80 is used as a reference) is 0.1 mm to 0.5 mm. May be set to. The angle of the guide groove can be appropriately set, and may be set to, for example, 10 ° to 45 °. The angle of the guide groove is the smaller angle between the extending direction of the guide groove and the horizontal direction. In the embodiment, the guide groove is linear, but may have a shape that is at least partially curved.

FIG. 6 is a front view when the first surface 80 is viewed from the side of the cap 64 along the axial direction so that the guide groove of the first surface 80 is located above the shaft 60. As shown in FIG. 6, the motor 10 is arranged so that the guide groove of the first surface 80 is located above the shaft 60.

The positions and shapes of the first inclined groove 81 and the second inclined groove 82 in the viewpoint (first viewpoint) shown in FIG. 6 will be described. The first inclined groove 81 is located on the left side of the second inclined groove 82. The height position of the left end portion 81a of the first inclined groove 81 is lower than the height position of the right end portion 81b of the first inclined groove 81. The height position of the right end portion 82b of the second inclined groove 82 is lower than the height position of the left end portion 82a of the second inclined groove 82. Therefore, in the first viewpoint, the first inclined groove 81 and the second inclined groove 82 are inclined with respect to the horizontal direction. In the first viewpoint, the first inclined groove 81 and the second inclined groove 82 are symmetrical with respect to the vertical axis passing through the rotating shaft 62.

(4) Features The casing 42 of the motor 10 of the present embodiment has a first surface 80 facing the end surface 66a of the cap 64 attached to the shaft 60. The first surface 80 has a plurality of guide grooves extending inclined with respect to the horizontal direction in the first viewpoint. The plurality of guide grooves are a first inclined groove 81 and a second inclined groove 82, which are linear convex portions located above the shaft 60.

A cap 64 is attached to the shaft 60 in order to prevent water from entering the space inside the motor 10 from the outside through the gap between the bearing 41 and the shaft 60. However, the water flowing from above on the main surface 42a of the casing 42 passes through the gap between the cap 64 and the second wall 48 and reaches the first surface 80, and further, the cap 64 and the first wall 46. It may reach the bearing 41 through the gap between the bearing 41 and the bearing 41. Further, water scattered outside the motor 10 may pass through the gap between the cap 64 and the second wall 48, adhere to the first surface 80, and finally reach the bearing 41.

In the present embodiment, the first inclined groove 81 and the second inclined groove 82 allow water that has reached the first surface 80 through the main surface 42a or water that has adhered to the first surface 80 in the horizontal direction (horizontal direction). ) Is a groove to escape. Specifically, the water that has reached the first inclined groove 81 through the first surface 80 flows toward the left side in the horizontal direction along the inclination of the first inclined groove 81. At this time, the water that has reached the first inclined groove 81 flows through the first inclined groove 81 from a high position to a low position. In other words, the water flowing through the first inclined groove 81 flows downward from the right end portion 81b of the first inclined groove 81 toward the left end portion 81a of the first inclined groove 81. Similarly, the water that has reached the second inclined groove 82 through the first surface 80 flows toward the right side in the horizontal direction along the inclination of the second inclined groove 82. In other words, the water flowing through the second inclined groove 82 flows downward from the left end portion 82a of the second inclined groove 82 toward the right end portion 82b of the second inclined groove 82. In FIG. 6, the flow direction of water flowing through the first inclined groove 81 and the second inclined groove 82 is indicated by a dotted arrow.

As a result, the water flowing downward along the first surface 80 is released in the left-right direction through the first inclined groove 81 and the second inclined groove 82. Therefore, it is suppressed that the water flowing downward along the first surface 80 travels along the surface of the first wall 46, gets over the first wall 46, and reaches the bearing 41. In the present embodiment, the inside of the motor 10 has only a simple configuration in which the first inclined groove 81 and the second inclined groove 82, which are a plurality of guide grooves, are provided on the first surface 80 which is a part of the main surface 42a of the casing 42. The intrusion of water into the can be suppressed. When water enters the motor 10 through the gap between the bearing 41 and the shaft 60, rusting of metal parts such as the shaft 60 and poor lubrication due to deterioration of the lubricating oil occur, and the vehicle is being driven. It causes abnormal noise and lock. Therefore, in this embodiment, it is possible to suppress the occurrence of a malfunction of the motor 10 due to the intrusion of water into the motor 10 at a relatively low cost.

(5) Modification example (5-1) Modification example A
In the embodiment, the plurality of guide grooves on the first surface 80 are composed of one first inclined groove 81 and one second inclined groove 82. The motor 10 of the embodiment is applicable to at least one of the following modifications A1 to A4 with respect to the first inclined groove 81 and the second inclined groove 82.

(5-1-1) Modification A1
As shown in FIG. 7, it is preferable that the first inclined groove 81 and the second inclined groove 82 are connected to each other. As a result, it is suppressed that the water flowing downward along the first surface 80 flows between the first inclined groove 81 and the second inclined groove 82 and reaches the first wall 46. In FIG. 7, the flow direction of water flowing through the first inclined groove 81 and the second inclined groove 82 is indicated by a dotted arrow. Therefore, water is effectively suppressed from entering the motor 10 through the first wall 46.

(5-1-2) Modification A2
As shown in FIGS. 6 and 7, in the first viewpoint, the right end portion 81b of the first inclined groove 81 and the left end portion 82a of the second inclined groove 82 may be located above the shaft 60. preferable. As a result, the first inclined groove 81 and the second inclined groove 82 can effectively release the water flowing downward along the first surface 80 above the shaft 60 in the left-right direction. Therefore, water is effectively suppressed from entering the motor 10 through the first wall 46.

It is more preferable that the right end portion 81b of the first inclined groove 81 is connected to the left end portion 82a of the second inclined groove 82 above the shaft 60 by combining the modified example A1 and the present modified example. In this case, as shown in FIG. 7, the first inclined groove 81 and the second inclined groove 82 have a shape of “^” (a shape obtained by rotating “>” by 90 ° to the left) in the first viewpoint1. It forms a guide groove for the book.

(5-1-3) Modification A3
As shown in FIG. 8, in the first viewpoint, the left end portion 81a of the first inclined groove 81 is located on the left side of the first position P1, and the right end portion 82b of the second inclined groove 82 is located. It is preferably located on the right side of the second position P2.

The first position P1 is a position separated from the horizontal center position P0 of the first wall 46 by a quarter of the first dimension L1 and to the left. The second position P2 is a position separated to the right by a quarter of the first dimension L1 from the horizontal center position P0 of the first wall 46. The center position P0 is the horizontal center of the range occupied by the first wall 46 in the horizontal direction. The first dimension L1 is the horizontal dimension of the first wall 46.

Under the above conditions, the range occupied by the first inclined groove 81 and the second inclined groove 82 is sufficiently secured in the horizontal direction, so that the first inclined groove 81 and the second inclined groove 82 are transmitted along the first surface 80. The water flowing downward can be effectively released to the left and right. Therefore, water is effectively suppressed from entering the motor 10 through the first wall 46.

(5-1-4) Modification A4
As shown in FIG. 9, in the first viewpoint, the left end portion 81a of the first inclined groove 81 is located on the left side of the horizontal left end portion 46b of the first wall 46, and is located on the left side of the second inclined groove. The right end portion 82b of the 82 is preferably located on the right side of the horizontal right end portion 46c of the first wall 46. As a result, the first inclined groove 81 allows the water flowing downward along the first surface 80 to a position where the water flowing downward away from the left end portion 81a of the first inclined groove 81 does not come into contact with the first wall 46. It can escape to the left. Similarly, the second inclined groove 82 allows the water flowing downward along the first surface 80 to a position where the water flowing downward away from the right end portion 82b of the second inclined groove 82 does not come into contact with the first wall 46. It can escape to the right. Therefore, water is effectively suppressed from entering the motor 10 through the first wall 46.

(5-2) Modification B
As shown in FIG. 10, the guide groove of the first surface 80 may be composed of a plurality of first inclined grooves 81 and a plurality of second inclined grooves 82. In the first viewpoint, the plurality of first inclined grooves 81 are arranged along the vertical direction. In the first viewpoint, the plurality of second inclined grooves 82 are arranged along the vertical direction. FIG. 10 shows five first inclined grooves 81 and five second inclined grooves 82. By providing the plurality of first inclined grooves 81 and the plurality of second inclined grooves 82, it is possible to effectively suppress the intrusion of water into the motor 10 through the first wall 46.

In this modification, the number of guide grooves located above the shaft 60 may be greater than the number of guide grooves located above the horizontal left end 46b and right end 46c of the first wall 46. Specifically, in FIG. 10, four guide grooves are located above the shaft 60, and two guide grooves are located above the horizontal left end 46b and right end 46c of the first wall 46. Is located. The number of guide grooves can be appropriately set according to the radial dimension of the first surface 80 and the dimensions and angles of the first inclined groove 81 and the second inclined groove 82.

In this modification, the plurality of first inclined grooves 81 and the plurality of second inclined grooves 82 may be arranged at equal intervals along the vertical direction. In this case, the distance between the plurality of guide grooves can be appropriately set, and may be set to, for example, 0.5 mm to 2.0 mm.

This modification can be applied in combination with at least one of the modifications A1 to A4. In that case, it is sufficient that at least one first inclined groove 81 and at least one second inclined groove 82 have at least one shape of the modified examples A1 to A4. For example, as shown in FIG. 10, the right end 81b of a part of the first inclined groove 81 and the left end 82a of a part of the second inclined groove 82 are connected to each other above the shaft 60. Just do it. Similarly, the left end 81a of some of the first inclined grooves 81 is located to the left of the horizontal left end 46b of the first wall 46, and the right end of some of the second inclined grooves 82. The portion 82b may be located on the right side of the horizontal right end portion 46c of the first wall 46. As shown in FIG. 10, when the guide groove of the first surface 80 is composed of a plurality of first inclined grooves 81 and a plurality of second inclined grooves 82, the first one depends on the height position in the vertical direction. The shapes of the inclined groove 81 and the second inclined groove 82 are different.

(5-3) Modification C
In the embodiment, the guide groove (first inclined groove 81 and second inclined groove 82) is formed by a plurality of convex portions formed on the first surface 80. However, the guide groove may be formed by a plurality of recesses formed on the first surface 80. In this case, the first inclined groove 81 and the second inclined groove 82 are linear depressions formed on the first surface 80.

Also in this modification, the dimensions of the guide groove can be appropriately set according to various conditions such as the radial dimension of the first surface 80. For example, the width of the guide groove may be set to 0.1 mm to 2.0 mm, and the depth of the guide groove (height when the first surface 80 is used as a reference) is 0.1 mm to 0.5 mm. May be set to.

This modification can be applied in combination with other modifications.

(5-4) Modification D
The first wall 46 has one step 84 formed along the radial direction of the shaft 60. However, the first wall 46 may have a plurality of steps 84 formed along the radial direction of the shaft 60. By providing a plurality of steps 84 on the first wall 46, water flowing downward along the first surface 80 travels on the surface of the first wall 46, gets over the first wall 46, and water flows inside the motor 10. Invasion is effectively suppressed. Further, the first wall 46 does not have to have the step 84.

(5-5) Modification E
As shown in FIG. 11, if the second wall 48 surrounds the entire perimeter of the cap 64, the second wall 48 may have a drainage ditch 86 formed below the cap 64. The drainage groove 86 is a groove formed on the inner peripheral surface of the second wall 48 at the lower end portion in the vertical direction of the second wall 48. The shape, size and number of drainage ditches 86 may be appropriately set. For example, the second wall 48 may have a plurality of drainage ditches 86.

The water released in the left-right direction by the first inclined groove 81 and the second inclined groove 82 flows downward along the first surface 80 in the region radially outside the first wall 46, and flows downward in the drainage groove 86. Inflow to. The water that has flowed into the drainage ditch 86 flows through the drainage ditch 86 and is discharged. Therefore, the drainage ditch 86 can invade the space between the cap 64 and the first surface 80, and can effectively discharge the water that has flowed to the lower end of the first surface 80.

(5-6) Modification F
The casing 42 of the motor 10 of the embodiment has a second wall 48 formed on the radial outer side of the first wall 46. However, the casing 42 does not have to have the second wall 48.

(5-7) Modification G
The air conditioner 200 may be a device that does not have a cooling function and a heating function but has an air cleaning function. In this case, the air conditioner 200 includes a blower 100 for blowing clean air from which foreign substances and the like have been removed, and the motor 10 is used for the blower 100.

Further, the motor 10 may be used for equipment and devices other than the blower 100 and the air conditioner 200.

―Conclusion―
Although the embodiments of the present disclosure have been described above, it will be understood that various modifications of the embodiments and details are possible without departing from the spirit and scope of the present disclosure described in the claims. ..

10: Motor 20: Rotor 30: Stator 42: Casing 46: First wall 48: Second wall 60: Shaft 62: Rotating shaft 64: Cap 66: Cylindrical part 80: First surface 81: First inclined groove 81a: First 1 Left end of the inclined groove 81b: Right end of the first inclined groove 82: Second inclined groove 82a: Left end of the second inclined groove 82b: Right end of the second inclined groove 84: Step 86: Drainage groove 90: Fan 100: Blower 102: Casing 104: Heat exchanger 200: Air conditioner

Japanese Unexamined Patent Publication No. 2020-96406

Claims (20)

Casing (42) and
A shaft (60) that rotates around a rotation shaft (62),
A cap (64) having a cylindrical portion (66) surrounding a part of the shaft and fixed to the shaft,
Equipped with
The casing is
A first wall (46) that surrounds at least a portion of the shaft and
A first surface (80) extending radially outward from the base of the first wall and facing the end surface of the cylindrical portion.
Have,
The first surface has a plurality of guide grooves including a first inclined groove (81) and a second inclined groove (82).
In the first viewpoint of looking at the first surface from the side of the cap so that the guide groove is located above the shaft.
The first wall is located at least above the shaft and
The height position of the left end portion (81a) of the first inclined groove is lower than the height position of the right end portion (81b) of the first inclined groove.
The height position of the right end portion (82b) of the second inclined groove is lower than the height position of the left end portion (82a) of the second inclined groove.
Motor (10). The first inclined groove and the second inclined groove are connected to each other.
The motor according to claim 1. In the first viewpoint, the right end of the first inclined groove and the left end of the second inclined groove are located above the shaft.
The motor according to claim 1 or 2. In the first viewpoint, the left end portion of the first inclined groove is a distance of a quarter of the horizontal dimension of the first wall from the horizontal center position (P0) of the first wall. Located on the left side of the position (P1) away from the left side,
In the first viewpoint, the right end portion of the second inclined groove is a distance from the center position, which is a quarter of the horizontal dimension of the first wall, and is farther to the right side (P2). Located on the right side,
The motor according to any one of claims 1 to 3. In the first viewpoint, the left end of the first inclined groove is located on the left side of the horizontal left end of the first wall.
In the first viewpoint, the right end of the second inclined groove is located on the right side of the horizontal right end of the first wall.
The motor according to any one of claims 1 to 4. The guide groove is formed by a plurality of protrusions protruding from the first surface.
The motor according to any one of claims 1 to 5. The guide groove is formed by a plurality of recesses formed on the first surface.
The motor according to any one of claims 1 to 5. The width of the guide groove is 0.1 mm to 2.0 mm.
The depth of the guide groove is 0.1 mm to 0.5 mm.
The motor according to any one of claims 1 to 7. The first surface is
A plurality of the first inclined grooves arranged along the vertical direction in the first viewpoint,
With the plurality of second inclined grooves arranged along the vertical direction in the first viewpoint,
Have,
The motor according to any one of claims 1 to 8. In the first viewpoint, the number of the guide grooves located above the shaft is larger than the number of the guide grooves located above both ends in the left-right direction of the first wall.
The motor according to claim 9. The distance between the plurality of guide grooves arranged along the vertical direction in the first viewpoint is 0.5 mm to 2.0 mm.
The motor according to claim 9 or 10. The distance between the end surface of the cylindrical portion and the first surface is 0.5 mm to 5.0 mm.
The motor according to any one of claims 1 to 11. The first wall has a plurality of steps (84) formed along the radial direction of the shaft.
The motor according to any one of claims 1 to 12. The cylindrical portion surrounds at least a part of the first wall.
The motor according to any one of claims 1 to 13. The casing further comprises a second wall (48) located radially outside the shaft with respect to the first wall.
The first surface is located between the first wall and the second wall.
The motor according to any one of claims 1 to 14. The second wall surrounds at least a portion around the cap.
The motor according to claim 15. The second wall surrounds the cap and has a drainage ditch (86).
The drainage ditch is formed below the cap in the first viewpoint.
The motor according to claim 15 or 16. Rotor (20) and
A stator (30) arranged inside the rotor and
Further prepare
The casing houses the rotor and the stator.
The shaft is connected to the rotor,
The motor according to any one of claims 1 to 17. The motor according to any one of claims 1 to 18.
A fan (90) fixed to the shaft of the motor and driven by the motor,
Equipped with
The motor is mounted such that the axis of rotation is horizontal and the guide groove is located above the shaft.
Blower (100). The housing (102) and
A heat exchanger (104) housed inside the housing and exchanging heat between the refrigerant and air.
The blower according to claim 19, which is housed inside the housing and blows air that has passed through the heat exchanger.
The air conditioner (200).

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