WO2021230239A1 - Dispositif cpap - Google Patents

Dispositif cpap Download PDF

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Publication number
WO2021230239A1
WO2021230239A1 PCT/JP2021/017896 JP2021017896W WO2021230239A1 WO 2021230239 A1 WO2021230239 A1 WO 2021230239A1 JP 2021017896 W JP2021017896 W JP 2021017896W WO 2021230239 A1 WO2021230239 A1 WO 2021230239A1
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WO
WIPO (PCT)
Prior art keywords
output shaft
permanent magnet
height direction
stator assembly
coil
Prior art date
Application number
PCT/JP2021/017896
Other languages
English (en)
Japanese (ja)
Inventor
祐三 東山
修 内藤
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2021230239A1 publication Critical patent/WO2021230239A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present disclosure relates to a CPAP (Continuous Positive Airway Pressure) device that sends air sucked into the device into the user's airway.
  • CPAP Continuous Positive Airway Pressure
  • the motor described in Patent Document 1 has a stator assembly mounted inside the motor housing.
  • the stator assembly includes a plurality of coils arranged in the circumferential direction.
  • a rotor assembly is arranged inside the stator assembly in the radial direction.
  • the rotor assembly includes permanent magnets arranged to face the coil of the stator assembly.
  • the output shaft is fixed to the rotor assembly. One end side of the output shaft is supported by an insertion hole in the motor housing. Further, the other end side of the output shaft extends to the outside of the motor housing.
  • a fan for blowing air is fixed to the outer part of the output shaft of the motor housing.
  • the output shaft is rotatably supported inside the insertion hole.
  • the output shaft is not firmly supported in the axial direction of the output shaft, it is in a state where it can be displaced in the axial direction. If the output shaft is displaced in the axial direction, the rotating shaft or fan may interfere with the motor housing or the like.
  • one aspect of the present disclosure includes a housing, a motor housed in the housing, and a blower fan rotated by the motor, and the motors are arranged in the circumferential direction.
  • a stator assembly including a plurality of coils, a rotor assembly including a plurality of permanent magnets arranged in the circumferential direction, an output shaft fixed to the rotor assembly and rotating together with the rotor assembly, and a part of the output shaft.
  • the CPAP device is wider than the other side of the winding center axis in the axial direction.
  • the perspective view which shows the CPAP apparatus An exploded perspective view of the CPAP device.
  • the CPAP device 10 includes a flat rectangular parallelepiped housing 20.
  • the thickness direction of the housing 20 is the height direction Td.
  • the longitudinal direction of the housing 20 is the longitudinal direction Ld
  • the lateral direction of the housing 20 is the width direction Wd.
  • An operation unit 21 for operating the CPAP device 10 is provided on the upper side surface 20U, which is the upper surface of the housing 20 in the height direction Td.
  • the operation unit 21 is composed of a circular switch 21A and an annular switch 21B.
  • the switch 21B is arranged so as to surround the switch 21A. Both the switch 21A and the switch 21B are push button switches, and by operating them, it is possible to turn on / off the power of the CPAP device 10 and change the settings.
  • a suction port 22 for introducing air from the outside to the inside of the housing 20 is open.
  • a filter 23 for filtering dust and the like contained in the air introduced into the housing 20 is attached to the suction port 22.
  • the blower 40 is housed inside the housing 20.
  • the blower 40 is arranged close to the first end side of Ld in the longitudinal direction in the housing 20.
  • the blower 40 includes a motor 80, a blower fan 50, and a fan case 61 that covers the blower fan 50.
  • the fan case 61 includes an upper fan case 62 and a lower fan case 63.
  • the lower fan case 63 is fitted to the lower side of the upper fan case 62 so as to face each other.
  • the fan case 61 is roughly classified into a substantially annular fan portion 60 and a lead-out pipe 70 protruding from the fan portion 60.
  • the fan portion 60 in the upper fan case 62 has a substantially circular bowl shape.
  • an introduction port 64 for sucking air is opened inside the fan case 61.
  • the introduction port 64 has a circular shape in a plan view.
  • a plate-shaped projecting wall 65 projects upward from the upper outer surface of the upper fan case 62.
  • a plurality of projecting walls 65 are provided, and in this embodiment, 10 projecting walls 65 are provided.
  • the protruding wall 65 extends in the radial direction of the upper fan case 62. Further, the protruding walls 65 are arranged at equal intervals in the circumferential direction on the radial outer side of the introduction port 64.
  • the fan portion 60 in the lower fan case 63 has a substantially annular shape when viewed from Td in the height direction.
  • the outer diameter of the fan portion 60 of the lower fan case 63 is the same as the outer diameter of the lower edge of the fan portion 60 of the upper fan case 62.
  • the motor 80 is fitted in the hole in the center of the fan portion 60 of the lower fan case 63. The details of the motor 80 will be described later.
  • a substantially circular tubular lead-out tube 70 is connected to the fan portion 60.
  • the lead-out pipe 70 is composed of an upper pipe portion 71 and a lower pipe portion 72.
  • the upper pipe portion 71 extends from the fan portion 60 of the upper fan case 62 toward the first end side in the longitudinal direction Ld.
  • the upper pipe portion 71 has an arc shape that is convex upward when viewed from the extending direction of the upper pipe portion 71. That is, the upper pipe portion 71 constitutes the upper half of the lead-out pipe 70 which is a substantially circular tube.
  • the upper pipe portion 71 is an integrally molded product with the upper fan case 62.
  • the lower pipe portion 72 extends from the fan portion 60 of the lower fan case 63 in the same direction as the upper pipe portion 71.
  • the extended length of the lower pipe portion 72 is the same as that of the upper pipe portion 71.
  • the lower pipe portion 72 has an arc shape that is convex downward when viewed from the extending direction. That is, the lower pipe portion 72 constitutes the lower half of the lead-out pipe 70, which is a substantially circular tube.
  • the lower pipe portion 72 is an integrally molded product with the lower fan case 63.
  • the outlet pipe 70 is connected to a discharge pipe 100 for discharging air from the inside of the housing 20 to the outside.
  • the discharge pipe 100 has a circular tubular shape.
  • the discharge pipe 100 is continuously connected to the downstream end of the outlet pipe 70 in the air flow direction.
  • the discharge pipe 100 penetrates the first end surface 20A of the housing 20 and extends in the longitudinal direction Ld. Therefore, the end on the first end side in the longitudinal direction Ld of the discharge pipe 100 is located on the outside of the housing 20.
  • the opening on the first end side in the longitudinal direction Ld of the discharge pipe 100 is a discharge port 101 for discharging air from the outside to the inside of the housing 20.
  • the mask 140 is connected to the tip of the discharge pipe 100 extending to the outside of the housing 20 via the hose 130.
  • the mask 140 is worn, for example, to cover the nose or mouth of the user 150.
  • the motor 80 includes a base 82 for accommodating and supporting the components of the motor 80.
  • the main body 83 of the base 82 has a bottomed cylindrical shape as a whole. That is, the main body portion 83 has a shape in which the cylindrical side portion 83B protrudes upward in the height direction Td from the edge of the circular bottom portion 83A. From the center of the bottom portion 83A, the shaft support portion 84 projects toward the upper side in the height direction Td.
  • the shaft support portion 84 has a cylindrical shape through which the insertion hole 84A penetrates in the center. Further, the insertion hole 84A penetrates the bottom portion 83A of the main body portion 83.
  • the main body portion 83 is an integrally molded product with the shaft support portion 84.
  • annular stator assembly 85 is arranged as a whole in the space between the shaft support portion 84 and the side portion 83B.
  • the stator yoke 86A in the stator assembly 85 has an annular shape.
  • the radial outer surface of the stator yoke 86A is fixed to the radial inner surface of the side portion 83B.
  • the teeth 86B protrudes inward in the radial direction from the radial inner surface of the stator yoke 86A.
  • the wall portion 86C projects from the radially inner end of the teeth 86B toward the upper side and the lower side of the height direction Td.
  • the amount of protrusion of the wall portion 86C in the height direction Td to the upper side and the lower side is the same amount on both sides.
  • the radial inner surface of the wall portion 86C has a circular arc shape that is convex outward in the radial direction when viewed from the height direction Td.
  • Six teeth 86B are provided.
  • the six teeth 86B are arranged at equal intervals in the circumferential direction of the stator yoke 86A.
  • a coil 87 is attached to each tooth 86B.
  • the coil 87 is composed of a winding 87A wound around the teeth 86B.
  • the winding center axis C of the coil 87 coincides with the radial direction and is orthogonal to the height direction Td. That is, the radial inner end face of the coil 87 extends along the height direction Td. Further, the winding center axis of the coil 87 coincides with the central position of the stator assembly 85 in the height direction Td.
  • the stator yoke 86A, the teeth 86B, and the wall portion 86C are made of magnetic materials, and are made of, for example, an electromagnetic steel plate such as a silicon steel plate.
  • the rotor assembly 88 is arranged inside the stator assembly 85 in the radial direction.
  • the rotor assembly 88 includes a cylindrical rotor yoke 89 and a permanent magnet 90 as a whole.
  • the rotor yoke 89 is composed of a large diameter portion 89A on the lower side in the height direction Td and a small diameter portion 89B on the upper side in the height direction Td.
  • the outer diameter and inner diameter of the small diameter portion 89B are smaller than the outer diameter and inner diameter of the large diameter portion 89A.
  • the inner diameter of the small diameter portion 89B is smaller than the outer diameter of the shaft support portion 84.
  • the inner diameter of the large diameter portion 89A is larger than the outer diameter of the shaft support portion 84.
  • the Td length in the height direction of the large diameter portion 89A is longer than the protruding length of the shaft support portion 84.
  • a shaft support portion 84 is housed inside the large diameter portion 89A.
  • a substantially cylindrical permanent magnet 90 is fixed to the radial outer surface of the large diameter portion 89A of the rotor yoke 89.
  • Four permanent magnets 90 are provided.
  • the four permanent magnets 90 are arranged at equal intervals in the circumferential direction of the rotor yoke 89. Further, the permanent magnet 90 is magnetized so that its radial outer pole is different from that of other adjacent permanent magnets 90.
  • the permanent magnet 90 faces the coil 87 of the stator assembly 85 on the winding center axis C of the coil 87.
  • the dimension of the permanent magnet 90 in the height direction Td is smaller than the dimension of the coil 87 in the height direction Td, and in the height direction Td, all the positions of the permanent magnet 90 are the coil 87. It overlaps with the position of.
  • the position of the lower surface of each permanent magnet 90 in the height direction Td is the same as the position of the lower end of the large diameter portion 89A.
  • the four permanent magnets 90 have a truncated cone shape as a whole.
  • the radial outer surface of the permanent magnet 90 is inclined with respect to the height Td so as to be located from the radial outer side to the inner side from the upper side to the lower side in the height direction Td.
  • a rod-shaped output shaft 81 is press-fitted inside the small diameter portion 89B of the rotor yoke 89 in the radial direction.
  • a part of the lower side of the output shaft 81 in the height direction Td reaches the inside of the large diameter portion 89A.
  • a part of the lower side of the output shaft 81 in the height direction Td is inserted into the insertion hole 84A of the shaft support portion 84 inside the large diameter portion 89A in the radial direction.
  • a slide bearing 91 is interposed between the outer peripheral surface of the output shaft 81 and the inner peripheral surface of the insertion hole 84A.
  • the slide bearing 91 has a cylindrical shape.
  • the outer diameter of the slide bearing 91 is substantially the same as the diameter of the insertion hole 84A. Further, the inner diameter of the slide bearing 91 is several micrometer to several tens of micron larger than the outer diameter of the output shaft 81. Lubricating oil is filled in the slight gap between the inner surface of the slide bearing 91 and the output shaft 81.
  • the axial dimension of the slide bearing 91 is about half of the total length of the output shaft 81.
  • a portion of the output shaft 81 housed in the large diameter portion 89A of the rotor yoke 89 is covered with a slide bearing 91.
  • a nut 92 is arranged below the slide bearing 91 in the height direction Td.
  • the nut 92 covers the insertion hole 84A of the shaft support portion 84 from below.
  • the lower end of the output shaft 81 is supported from below by the support portion 92A of the nut 92.
  • the material of the support portion 92A is a heat-resistant resin. Further, the nut 92 suppresses the lubricating oil filled between the output shaft 81 and the slide bearing 91 from leaking to the lower side of the slide bearing 91 in the height direction Td.
  • An annular flange 93 is covered on the upper opening edge of the base 82 in the height direction Td.
  • the inner diameter of the flange 93 is slightly larger than the outer diameter of the large diameter portion 89A of the rotor yoke 89.
  • the output shaft 81 is covered with the small diameter portion 89B through the hole in the center of the flange 93 and protrudes upward from the flange 93.
  • a blower fan 50 is attached to the tip of the output shaft 81 on the upper side of Td in the height direction via the small diameter portion 89B of the rotor yoke 89 and the tubular body 94.
  • the tubular body 94 is a cylindrical metal member, and is attached to the outer peripheral surface of the small diameter portion 89B of the rotor yoke 89.
  • the blower fan 50 includes a holding plate 51 and a plurality of blades 52.
  • the holding plate 51 has a substantially disk shape. In this embodiment, the holding plate 51 is shaped so as to bulge upward toward the center. At the center of the holding plate 51, a circular through hole 53 is opened.
  • the output shaft 81 is fixed to the through hole 53 via the tubular body 94 and the small diameter portion 89B.
  • a plurality of blades 52 project upward on the upper surface of the holding plate 51.
  • the blade 52 has a plate shape.
  • the blade 52 extends from the radial inside to the outside of the holding plate 51.
  • blades 52 having different extending lengths are provided.
  • the blades 52 are arranged at equal intervals in the circumferential direction of the holding plate 51. Therefore, the plurality of blades 52 are arranged radially when viewed from the height direction Td.
  • a storage space S1 in which the blower fan 50 is housed and a flow passage S2 through which the air blown from the blower fan 50 flows are partitioned.
  • the accommodation space S1 is composed of a radial central portion of the internal space of the fan portion 60.
  • the accommodation space S1 is a space sandwiched in the vertical direction between the upper surface of the flange 93 and the inner surface of the upper fan case 62. Therefore, the accommodation space S1 directly communicates with the outside of the fan case 61 via the introduction port 64.
  • the flow passage S2 is composed of a radial outer portion of the internal space of the fan portion 60.
  • the flow passage S2 is a space sandwiched in the vertical direction between the inner surface of the lower fan case 63 and the inner surface of the upper fan case 62. Therefore, the flow passage S2 extends in an annular shape on the radial outside of the accommodation space S1. Further, the flow passage S2 communicates with the accommodation space S1 in the radial direction. In this embodiment, the flow passage S2 has a substantially circular shape in a cross-sectional view orthogonal to the extending direction of the flow passage S2.
  • the gap G becomes wider toward the lower side in the height direction Td. Therefore, in the height direction Td, the average of the gap G below the winding center axis C of the coil 87 is wider than the average of the gap G above the winding center axis C of the coil 87. That is, in the gap G, the portion above the winding center axis C is wider than the portion below the winding center axis C.
  • the blower fan 50 is fixed to the upper end of the output shaft 81 in the height direction Td. Therefore, in this embodiment, the blower fan 50 is fixed to the side where the gap G is widened in the height direction Td.
  • the rotor assembly 88 rotates due to the electromagnetic force generated between the coil 87 and the permanent magnet 90.
  • the output shaft 81 and the blower fan 50 rotate.
  • the blower fan 50 rotates, the air outside the blower 40 is sucked into the fan case 61 through the introduction port 64.
  • the air is guided to the flow passage S2 of the fan case 61 by the centrifugal force of the blower fan 50.
  • the air circulates in the flow passage S2 in the circumferential direction in accordance with the rotation of the blower fan 50.
  • the flow velocity and pressure of the air increase due to the rotation of the blower fan 50.
  • the air that has passed through the flow passage S2 passes through the outlet pipe 70 and the discharge pipe 100 and is discharged to the outside of the blower 40.
  • blower fan 50 rotates, air is introduced into the fan case 61 from the introduction port 64.
  • the blower fan 50 When air is introduced into the fan case 61, the blown air flows at a correspondingly high speed in the accommodation space S1 and the flow passage S2 in the inside of the fan case 61.
  • the air flow is slower than that in the accommodation space S1 and the flow passage S2. Therefore, due to the difference in the flow velocity of the air, the pressure in the space between the blower fan 50 and the motor 80 becomes larger than that in the accommodation space S1 which is the upper portion of the blower fan 50. Therefore, a force is applied to the blower fan 50 so as to be pushed upward in the height direction Td due to the pressure difference between the upper portion and the lower portion of the blower fan 50.
  • the gap G between the permanent magnet 90 and the stator assembly 85 is wider on the lower side in the height direction Td than on the upper side in the height direction Td. That is, in the gap G, the portion above the winding center axis C is wider than the portion below the winding center axis C. Therefore, when electric power is supplied to the motor 80 and an electromagnetic force is generated between the coil 87 and the permanent magnet 90, a force that tries to attract the permanent magnet 90 and the stator assembly 85 is generated. At this time, a force that attracts the permanent magnet 90 toward the winding center axis C of the coil 87 acts as a whole.
  • the gap G between the permanent magnet 90 and the stator assembly 85 is wider in the lower side in the height direction Td than in the upper side in the height direction. Therefore, the upper portion of the permanent magnet 90 in the height direction Td is pulled more strongly toward the winding center axis C of the coil 87 than the lower portion. As a result, due to the difference in the force pulled by the coil 87 between the upper portion and the lower portion of the permanent magnet 90, the permanent magnet 90 also exerts a force from the upper side to the lower side in the height direction Td. .. As a result, it is possible to prevent the rotor assembly 88 and the blower fan 50 from being displaced above the Td in the height direction.
  • the rotor assembly 88 is arranged radially inside the stator assembly 85. Therefore, the radial dimension of the rotor assembly 88 can be reduced as compared with the case where the rotor assembly 88 is arranged radially outside the stator assembly 85. Therefore, even if the rotor assembly 88 receives a force that pulls the rotor assembly 88 in the height direction Td, the problem that the output shaft 81 shakes with respect to the height direction Td is unlikely to occur.
  • the slide bearing 91 is interposed between the inner peripheral surface of the insertion hole 84A and the outer peripheral surface of the output shaft 81.
  • the plain bearing 91 supports the output shaft 81 in a relatively long range in the axial direction of the output shaft 81. Therefore, even if the rotor assembly 88 is subjected to a force that is pulled in the height direction Td, problems such as the output shaft 81 being shaken with respect to the height direction Td are unlikely to occur.
  • changing the gap G in the height direction Td means that the height of the portion below the height direction Td on the radial outer surface of the permanent magnet 90 is increased. This is achieved by locating it closer to the output shaft 81 than the location above the direction Td. In particular, in the present embodiment, it is realized by inclining the radial outer surface of the permanent magnet 90 with respect to the height direction Td. With this configuration, the gap G can be changed only by changing the outer shape of the permanent magnet 90, and the design of other members cannot be changed.
  • blower fan 50 may be displaced toward the upper side in the height direction Td together with the output shaft 81 and the rotor assembly 88 so as to be lifted.
  • the gap G between the permanent magnet 90 and the stator assembly 85 is narrower toward the blower fan 50 side in the height direction Td. Therefore, the force that the blower fan 50 tends to move toward the upper side of Td in the height direction can be offset by the electromagnetic force of the coil 87. Therefore, it is possible to prevent the output shaft 81 and the rotor assembly 88 from moving to the upper side in the height direction Td.
  • the CPAP device 10 may include a device different from the blower 40.
  • the CPAP device 10 may include a humidifier.
  • a humidifier is provided, for example, it is preferable to attach the humidifier to the discharge pipe 100 of the housing 20 and attach the hose 130 to the discharge side of the humidifier.
  • the shape of the blower 40 is not limited to the example of the above embodiment.
  • the outer shape of the fan case 61 is rectangular parallelepiped. It may be a polygonal shape.
  • the lead-out pipe 70 may be extended or curved so that the inner diameter is widened.
  • the fan case 61 can be omitted.
  • the housing 20 may be shaped so as to partition the space corresponding to the flow passage S2 of the fan case 61.
  • the configuration of the motor 80 is not limited to the above embodiment. As long as the motor 80 includes an output shaft 81, a rotor assembly 88, a stator assembly 85, and a base 82, other members may not be included, or configurations other than the above-described embodiment may be included. .. Further, the configuration of the motor 80 may be a so-called outer rotor type. That is, the rotor assembly 88 may be arranged radially outside the stator assembly 85. Further, for example, a rolling bearing may be used instead of the sliding bearing 91.
  • the base 82 may have any shape as long as it can support the output shaft 81.
  • the base 82 has only the shaft support portion 84, and may not include the main body portion 83.
  • the wall portion 86C of the stator assembly 85 may be omitted.
  • the distance between the coil 87 and the permanent magnet 90 is the gap G.
  • the magnetized portion of the permanent magnet 90 is not limited to the example of the above embodiment.
  • the permanent magnet 90 may be magnetized so that the outer poles in the radial direction are different every 45 degrees in the circumferential direction. That is, the number of permanent magnets 90 does not have to be four.
  • the position of the permanent magnet 90 and the position of the stator assembly 85 do not have to overlap in the entire range of the permanent magnet 90 in the height direction Td. It is sufficient that the permanent magnet 90 partially faces the coil 87 in the radial direction and the permanent magnet 90 is located on the winding center axis C of the coil 87. Even in this case, the gap G may be wider in the upper portion in the height direction Td with the winding center axis C as the boundary than in the lower portion.
  • the winding center axis C of the coil 87 may be inclined with respect to the radial direction.
  • the radial inner surface of the coil 87 is formed.
  • the gap G between the permanent magnet 90 and the stator assembly 85 does not have to gradually widen from the upper side to the lower side in the height direction Td.
  • the radial outer surface of the permanent magnet 90 may be stepped, and the gap G may be discontinuously widened from the upper side to the lower side in the height direction Td.
  • the lower portion of the height direction Td should be located closer to the output shaft 81 than the upper portion of the height direction Td. Can be realized.
  • the gap G between the permanent magnet 90 and the stator assembly 85 may widen from the lower side to the upper side of the Td in the height direction.
  • the permanent magnet 90 has a truncated cone shape.
  • the radial outer surface of the permanent magnet 90 is inclined with respect to the height Td so as to be located from the radial outer side to the inner side from the lower side to the upper side of the height direction Td. Therefore, the gap G between the permanent magnet 90 and the stator assembly 85 is wider toward the upper side in the height direction Td than from the lower side in the height direction Td.
  • the permanent magnet 90 is pulled to the upper side of the height direction Td by the attractive force between the permanent magnet 90 and the stator assembly 85, so that the entire rotor assembly 88 including the permanent magnet 90 is moved to the upper side of the height direction Td. Be pulled.
  • the blower fan 50 fixed to the rotor assembly 88 is also pulled upward in the height direction Td. Therefore, it is possible to prevent the blower fan 50 and the output shaft 81 from being displaced below the Td in the height direction.
  • the position of the winding center axis C of the coil 87 may be referred to as a reference height in the length direction (height direction Td) of the output shaft 81.
  • a reference height in the length direction (height direction Td) of the output shaft 81, an arbitrary position (upper side in FIG. 5) closer to the tip of the output shaft 81 than the reference height may be referred to as a first height position. ..
  • a second height position In the length direction (height direction Td) of the output shaft 81, an arbitrary position (lower side in FIG. 5) closer to the base end of the output shaft 81 than the reference position or the reference height is referred to as a second height position.
  • the radial outward surface of the permanent magnet 90 and the radial inward surface of the stator assembly 85 may be separated by a radial reference distance at a reference height position in the length direction (height direction Td) of the output shaft 81. , At the first height position, they may be separated by a first radial distance smaller than the radial reference distance, and at the second height position, only a second radial distance larger than the radial reference distance. May be separated.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Un aspect de la présente divulgation concerne un dispositif CPAP qui réduit un écart de position dans une direction axiale d'un arbre de sortie d'un moteur. Un moteur (80) d'un dispositif CPAP selon un aspect de la présente invention comprend : un ensemble stator (85) comprenant une bobine (87) et ayant une forme annulaire dans son ensemble ; un ensemble rotor (88) disposé radialement à l'intérieur de l'ensemble stator (85) ; et un arbre de sortie (81) qui tourne avec l'ensemble rotor (88). L'arbre de sortie (81) s'étend dans le sens de la hauteur (Td), et est inséré dans un trou d'insertion (84A) d'une base (82). Un aimant permanent (90) de l'ensemble rotor (88) fait face à l'ensemble stator (85) dans une direction radiale. L'aimant permanent (90) fait face à une bobine (87) de l'ensemble stator (85) sur un axe central d'enroulement (C) de la bobine (87) de l'ensemble stator (85). Un espace (G) entre l'aimant permanent (90) et l'ensemble stator (85) est plus large dans une partie sur un côté supérieur dans le sens de la hauteur (Td) par rapport à l'axe central d'enroulement (C) que dans une partie sur un côté inférieur dans le sens de la hauteur (Td) par rapport à l'axe central d'enroulement (C).
PCT/JP2021/017896 2020-05-13 2021-05-11 Dispositif cpap WO2021230239A1 (fr)

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Application Number Priority Date Filing Date Title
JP2020084564 2020-05-13
JP2020-084564 2020-05-13

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WO2021230239A1 true WO2021230239A1 (fr) 2021-11-18

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PCT/JP2021/017896 WO2021230239A1 (fr) 2020-05-13 2021-05-11 Dispositif cpap

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001069738A (ja) * 1999-08-31 2001-03-16 Fujitsu Ten Ltd 外周対向形モータ
JP2014512479A (ja) * 2011-04-18 2014-05-22 レスメド・モーター・テクノロジーズ・インコーポレーテッド Ｐａｐシステムブロワ
JP2015092810A (ja) * 2013-09-30 2015-05-14 ミネベア株式会社 ブラシレスモータ及びそのモータを用いた送風機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001069738A (ja) * 1999-08-31 2001-03-16 Fujitsu Ten Ltd 外周対向形モータ
JP2014512479A (ja) * 2011-04-18 2014-05-22 レスメド・モーター・テクノロジーズ・インコーポレーテッド Ｐａｐシステムブロワ
JP2015092810A (ja) * 2013-09-30 2015-05-14 ミネベア株式会社 ブラシレスモータ及びそのモータを用いた送風機

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