CPAP DEVICE

A blower of a CPAP device is housed inside a main body case of a CPAP device. The blower is roughly divided into a fan unit housing a fan therein, and a delivery tube, through which air sent from the fan passes. In the main body case, a first support member, a second support member, and a third support member are interposed between the main body case and the fan unit to support the fan unit. When viewed from a rotation axis of the fan, the first support member and the second support member are disposed to pinch the blower on the side of a connection point between the fan unit and the delivery tube relative to the rotation axis, and the third support member is located on the opposite side to the connection point between the fan unit and the delivery tube relative to the rotation axis.

BACKGROUND OF THE DISCLOSURE

Field of the Disclosure

The present disclosure relates to a continuous positive airway pressure (CPAP) device configured to send air inhaled into the device to the airway of a user.

Description of the Related Art

In a CPAP device described in Patent Document 1, a blower for sending out air is housed inside a main body case. A sound absorbing silencer is housed in the main body case. A passage for supplying air to the blower is defined inside the sound absorbing silencer. The sound absorbing silencer is formed in such a shape as to substantially wrap the entire blower. Further, the sound absorbing silencer is in contact with an outer surface of the blower and an inner surface of the main body case to support the blower inside the main body case.Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-033522

BRIEF SUMMARY OF THE DISCLOSURE

When a support member for supporting the blower is interposed between the blower and the main body case as in the CPAP device described in Patent Document 1, the effect of suppressing vibrations and noise significantly depends on a contact position between the support member and the blower. In the CPAP device of Patent Document 1, no consideration is given to the effectiveness of a position at which the support member is disposed from the perspective of preventing the user from perceiving vibrations, noise, and the like. Accordingly, there is still room for improvement in this respect.

In order to solve the above problem, the present disclosure is a CPAP device including a main body case; a blower housed inside the main body case; and three or more support members interposed between the main body case and the blower, and configured to support the blower inside the main body case. The blower includes a fan unit housing a fan configured to send air by being rotated, and a delivery tube through which the air sent from the fan passes. In a view from a direction of a rotation axis of the fan, first and second support members of the above-mentioned support members are disposed to pinch the blower on a side of a connection point between the fan unit and the delivery tube relative to the rotation axis, and a third support member different from the first and second support members of the above-mentioned support members is disposed on a side opposite to the connection point relative to the rotation axis.

According to the above configuration, since the blower is supported by, at least, three of the first to third support members, it is possible to suppress the vibrations of the entire blower. Further, since the vicinity of the delivery tube in the blower is pinched with the first support member and the second support member, it is possible to more effectively suppress the vibrations of the delivery tube in the blower. In the case where the vibrations of the delivery tube are suppressed, it is also possible to suppress the transmission of the vibrations from the delivery tube to the user via a hose, a mask and the like, and therefore the user is unlikely to perceive the vibrations.

The user is unlikely to perceive the vibrations of a blower due to the drive of a CPAP device.

DETAILED DESCRIPTION OF THE DISCLOSURE

Hereinafter, an embodiment of a CPAP device configured to send air introduced into the device to the airway of a user will be described with reference to the accompanying drawings.

As illustrated inFIG.1, a CPAP device10includes a main body case20having a flat rectangular parallelepiped shape. In the following description, a thickness direction of the main body case20is referred to as a height direction Td. When viewed from the height direction Td, the length direction of the main body case20is referred to as a length direction Ld, and the short-side direction of the main body case20is referred to as a width direction Wd.

An operation unit21for operating the CPAP device10is provided on an upper-side surface20U, which is a surface on the upper side in the height direction Td of the main body case20. In this embodiment, the operation unit21is constituted of a switch21A having a circular shape and a switch21B having an annular shape. The switch21B is disposed in such a manner as to surround the switch21A. Both the switch21A and the switch21B are push button switches, and by operating these switches, it is possible to turn on and off a power supply of the CPAP device10, change settings, and the like.

An inhalation port22for introducing air from the outside to the inside of the main body case20is opened in a first end surface20A, which is an end surface on a first end side in the length direction Ld of the main body case20. A filter23for filtering out dust and the like contained in the air to be introduced into the main body case20is attached to the inhalation port22.

As illustrated inFIG.2, a control unit30is housed inside the main body case20. The control unit30is disposed on a second end side relative to the center in the length direction Ld. The control unit30includes a control substrate and the like, and converts an operation of the operation unit21into an electric signal to control the CPAP device10. InFIGS.2and3, the control unit30is schematically illustrated as having a rectangular parallelepiped shape.

As illustrated inFIG.2, a blower40is housed inside the main body case20. The blower40is disposed on the first end side relative to the control unit30in the length direction Ld. As illustrated inFIG.4, the blower40is roughly divided into a fan unit60housing a fan50therein, and a delivery tube70through which air sent from the fan50passes.

As illustrated inFIG.4, a fan case61of the fan unit60has a circular shape when viewed from the height direction Td. The fan case61includes an upper fan case62and a lower fan case63.

As illustrated inFIG.5, the upper fan case62has a circular bowl shape. In the center of the upper fan case62, an introduction port64for inhaling air from the outside to the inside of the fan unit60is opened. The introduction port64has a circular shape in a plan view. A projection wall65having a plate shape projects upward from an outer surface on the upper side of the upper fan case62. A plurality of the projection walls65is provided, and in the present embodiment, ten projection walls65are provided. The projection wall65extends in a radial direction of the upper fan case62. The projection walls65are arranged at equal intervals in the circumferential direction at the outer side portion in the radial direction of the introduction port64. Accordingly, the plurality of projection walls65is radially arranged when viewed from the height direction Td.

The lower fan case63has an annular shape when viewed from the height direction Td. The outside diameter of the lower fan case63is equal to the outside diameter of a lower edge of the upper fan case62. A motor80is fitted into a hole at the center of the lower fan case63. The lower end of the motor80is located on the upper side relative to the lower end of the lower fan case63in the height direction Td. That is, the motor80is not in contact with the main body case20, and is supported by the lower fan case63. A rotation shaft81of the motor80extends upward from the center of the motor80.

The lower fan case63has a substantial U shape in a cross section orthogonal to the radial direction. The lower fan case63is fitted to the lower side of the upper fan case62to face each other. The upper fan case62and the lower fan case63define a housing space.

The fan50configured to send air by the rotation thereof is disposed in the housing space. The fan50is constituted of a holding plate51and a plurality of blades52. The holding plate51has a substantial disk shape. An insertion hole53passes through the center of the holding plate51. A tip end portion of the rotation shaft81of the motor80is fixed to the insertion hole53. At a surface on the upper side of the holding plate51, the plurality of blades52projects upward. The blade52has a plate shape. The blade52extends toward the outer side portion from the inner side in the radial direction of the holding plate51. In this embodiment, the blades52having different extension lengths are provided. The blades52are arranged at equal intervals in the circumferential direction of the holding plate51. Accordingly, the plurality of blades52is radially arranged when viewed from the height direction Td. Outer side ends in the radial direction of the blades52are each located on the same virtual circle centered on the center of the holding plate51.

As illustrated inFIG.4, the delivery tube70having a circular tube shape is connected to the fan unit60. As illustrated inFIG.5, the delivery tube70is constituted of an upper tube portion71and a lower tube portion72. The upper tube portion71extends in a tangential direction of the circular-shaped upper fan case62. When viewed from the extending direction of the upper tube portion71, the upper tube portion71has an upwardly-convexed arc shape. That is, the upper tube portion71constitutes an upper half of the circular tube-shaped delivery tube70. In the present embodiment, the upper tube portion71is integrally molded with the upper fan case62.

The lower tube portion72extends in a tangential direction of the annular-shaped lower fan case63. The extension length of the lower tube portion72is equal to that of the upper tube portion71. When viewed from the extending direction of the lower tube portion72, the lower tube portion72has a downward-convexed arc shape. That is, the lower tube portion72constitutes a lower half of the circular tube-shaped delivery tube70. In the present embodiment, the lower tube portion72is integrally molded with the lower fan case63.

As illustrated inFIG.4, the lower tube portion72is fitted to the lower side of the upper tube portion71to face each other. A space inside the tube defined by the upper tube portion71and the lower tube portion72communicates with the housing space of the fan case61. Air sent out from the fan unit60flows through this space inside the tube. An opening of the delivery tube70on the opposite side to the side connected to the fan unit60is a delivery port73for the delivery of the air from the blower40to the outside. As illustrated inFIG.3, in the present embodiment, when viewed from the height direction Td, a connection point CP between the fan unit60and the delivery tube70is an intersection of a center axis line70A, which passes through the center in the width direction Wd of the delivery tube70and extends in the extending direction of the delivery tube70, and an outside diameter circle61A of the housing space of the fan case61.

As illustrated inFIG.3, a discharge tube90for discharging air from the inside of the main body case20to the outside is connected to the delivery tube70. The discharge tube90has a circular tube shape. The discharge tube90covers a portion of the delivery tube70on the first end side in the length direction Ld from the outer side portion in the radial direction.

As illustrated inFIG.2, the discharge tube90passes through the first end surface20A of the main body case20and extends in the length direction Ld.

Accordingly, an end of the discharge tube90on the first end side in the length direction Ld is located at an outer side portion of the main body case20. An opening on the first end side in the length direction Ld of the discharge tube90is a discharge port91for discharging air from the inside to the outside of the main body case20.

A support structure of the blower40in the main body case20will be described below.

As illustrated inFIG.5, a first projection66projects toward an outer side portion in the radial direction from the outer surface of the lower fan case63. As illustrated inFIG.3, when viewed from the height direction Td, the first projection66is located on the side of the connection point CP between the fan unit60and the delivery tube70relative to a rotation axis RA of the fan50in the fan unit60. In the present embodiment, the first projection66is disposed at a position near a side surface on the second end side in the width direction Wd of the main body case20. In the present embodiment, the extending direction of the rotation axis RA coincides with the height direction Td.

As illustrated inFIG.5, an inner portion111A of a first damper111made of rubber is attached to the first projection66. The inner portion111A has a substantially elliptical shape slightly longer in the height direction Td when viewed from a projecting direction of the first projection66. A recess (not illustrated) is provided in the inner portion111A, and the first projection66and the first damper111are fixed by inserting the first projection66into the recess. At an outer side portion in the radial direction of the inner portion111A, an outer portion111B of the first damper111is disposed. The outer portion111B has an elliptical ring shape surrounding the inner portion111A from the outside. In the first damper111, the inner portion111A and the outer portion111B are coupled to each other at a plurality of positions in the circumferential direction. In other words, the inner portion111A and the outer portion111B are separated from each other at a position where they are not coupled to each other so as to be relatively movable.

As illustrated inFIG.3, a second projection67projects toward an outer side portion in the radial direction from the outer surface of the lower fan case63in the fan unit60. When viewed from the height direction Td, the second projection67is located on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50in the fan unit60. The second projection67is disposed on the opposite side to the first projection66across the center axis line70A of the delivery tube70.

As illustrated inFIG.5, a second damper112made of rubber is attached to the second projection67. The constitution of the second damper112is the same as that of the first damper111. To be specific, the second damper112is constituted of an inner portion112A and an outer portion112B.

A third projection68projects toward an outer side portion in the radial direction from the outer surface of the lower fan case63when viewed from the height direction Td. As illustrated inFIG.3, when viewed from the height direction Td, the third projection68is located on the opposite side to the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50in the fan unit60.

A third damper113made of rubber is attached to the third projection68. The constitution of the third damper113is the same as that of the first damper111. To be specific, the third damper113is constituted of an inner portion113A and an outer portion113B.

As illustrated inFIG.3, a first support member121is attached to the bottom of the main body case20. The first support member121is formed substantially in a plate shape. The first support member121is disposed near a side wall on the second end side in the width direction Wd of the main body case20. Threaded holes H are provided at both ends in an extension direction of the first support member121. The first support member121is fixed to the main body case20by screwing screws (not illustrated) into the threaded holes H. In the first support member121, there is a hole passing through in the thickness direction of the first support member121. The first damper111of the fan unit60described above is fitted into the hole of the first support member121. That is, the first support member121is interposed between the main body case20and the fan unit60, and supports the fan unit60in the main body case20.

A second support member122is attached to the bottom of the main body case20. The constitution of the second support member122is the same as that of the first support member121. The second support member122is disposed near a side wall on the first end side in the length direction Ld of the main body case20. The second damper112of the fan unit60described above is fitted into a hole passing through in the thickness direction of the second support member122. That is, the second support member122is interposed between the main body case20and the fan unit60, and supports the fan unit60in the main body case20.

A third support member123is attached to the bottom surface of the main body case20. The constitution of the third support member123is the same as that of the first support member121. The third support member123is disposed near a side wall on the first end side in the width direction Wd of the main body case20. The third damper113of the fan unit60described above is fitted into a hole passing through in the thickness direction of the third support member123. That is, the third support member123is interposed between the main body case20and the fan unit60, and supports the fan unit60in the main body case20.

Next, the arrangement of the three support members will be described in detail. The first support member121is disposed as corresponding to the first damper111of the fan unit60. As described above, the first damper111is attached to the first projection66. Accordingly, the first support member121is disposed at an outer side portion of the fan unit60when viewed from the height direction Td. When viewed from the height direction Td, the first support member121is located on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50in the fan unit60.

The second support member122is disposed as corresponding to the second damper112of the fan unit60. As described above, the second damper112is attached to the second projection67. Accordingly, the second support member122is located at an outer side portion of the fan unit60when viewed from the height direction Td. When viewed from the height direction Td, the second support member122is located on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50. When viewed from the height direction Td, the second support member122is disposed on the opposite side to the first support member121across the connection point CP. Accordingly, the first support member121and the second support member122are disposed to pinch the blower40therebetween. Specifically, when viewed from the height direction Td, a boundary VB of the blower40is taken as a straight line that is orthogonal to a straight line VA passing through the rotation axis RA of the fan50and the connection point CP and passes through the rotation axis RA of the fan50. In this case, with the boundary VB as a boundary, a region on the connection point CP side is defined as a first region E1, and a region on the opposite side to the connection point CP is defined as a second region E2. In the present embodiment, the first support member121and the second support member122support the first region E1 of the fan unit60of the blower40.

In this case, a large number of virtual line segments may be drawn between the first support member121and the second support member122. Among the virtual line segments that may be drawn in this way, a virtual line segment farthest from the rotation axis RA is defined as a virtual line segment VLf. When viewed from the height direction Td, the virtual line segment VLf is in contact with the first support member121and the second support member122from the side opposite to the rotation axis RA in the direction in which the straight line VA extends. When viewed from the height direction Td, the virtual line segment VLf is located at an outer side portion in the radial direction relative to an outer edge50A of the fan50. That is, the virtual line segment VLf does not intersect the fan50.

Many of the virtual line segments that may be drawn between the first support member121and the second support member122pass through on the rotation axis RA side relative to the connection point CP between the fan unit60and the delivery tube70. Accordingly, the first support member121and the second support member122are disposed on the rotation axis RA side relative to the connection point CP, that is, are disposed to pinch the fan unit60of the blower40. When viewed from the height direction Td, some of the virtual line segments that may be drawn between the first support member121and the second support member122do not intersect any of the fan50and the delivery tube70.

The third support member123is disposed as corresponding to the third damper113of the fan unit60. As described above, the third damper113is attached to the third projection68. Accordingly, the third support member123is disposed at an outer side portion of the fan unit60when viewed from the height direction Td. When viewed from the height direction Td, the third support member123is located on the opposite side to the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50. That is, the third support member123supports the fan unit60of the blower40in the second region E2. In particular, in the present embodiment, when viewed from the height direction Td, the third support member123is located at a position where the distance between the third support member123and the first support member121is equal to the distance between the third support member123and the second support member122. In other words, the third support member123is disposed on the straight line VA passing through the rotation axis RA of the fan50and the connection point CP.

In this embodiment, as illustrated inFIG.3, the distance between the support members is defined as the distance between the fixing centers of the support members, that is, the distance between the midpoints at the centers of the two threaded holes H of the support members. A first distance D1 as the distance between the first support member121and the second support member122is shorter than a second distance D2 as the distance between the first support member121and the third support member123. The first distance D1 is shorter than a third distance D3 as the distance between the second support member122and the third support member123. The second distance D2 is equal to the third distance D3. Thus, an isosceles triangle is formed by the three line segments for determining the distances between each of the support members. In this isosceles triangle, the equal sides are longer than the base. In the present embodiment, the fan unit60is supported to the main body case20only by three support members, and the fan unit60is not in direct contact with the main body case20.

Next, the operations of the CPAP device10in the above-described embodiment will be described.

As illustrated inFIG.6, when the CPAP device10is used, a first end portion of a hose130is connected to the tip end portion of the discharge tube90projecting to the outside of the main body case20. Then, a second end portion of the hose130is connected to a mask140. The mask140is worn to cover the nose or mouth of a user150, for example.

When the motor80is driven by the operation unit21of the CPAP device10being operated, the rotation shaft81of the motor80rotates. With the rotation of the rotation shaft81, the fan50rotates taking the rotation axis RA as the rotation center. When the fan50rotates, air is sucked into the main body case20from the outside of the main body case20through the inhalation port22. The air sucked into the main body case20through the inhalation port22is inhaled into the housing space of the fan unit60of the blower40from the introduction port64. The air in the housing space of the fan unit60is sent out to the delivery tube70by the fan50. The air delivered from the delivery port73of the delivery tube70passes through the discharge tube90to be discharged to the outside of the main body case20. The air passes through the hose130, and is delivered from the mask140to the user150.

Next, effects of the CPAP device10in the above-described embodiment will be described.

(1) According to the above-described embodiment, when viewed from the height direction Td, the first support member121and second support member122are each disposed on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA of the fan50. The first support member121and second support member122are disposed to pinch the blower40therebetween. This makes it possible to suppress the vibrations of a portion of the fan unit60near the delivery tube70. Thus, since the vibrations of the delivery tube70may be suppressed, it is also possible to suppress the transmission of the vibrations from the delivery tube70to the user150via the hose130, the mask140, and the like. As a result, the user150is unlikely to perceive the vibrations.

(2) According to the above-described embodiment, the delivery tube70is not supported to the main body case20by the support members. The delivery tube70is only connected to the discharge tube90. Thus, even when the fan unit60vibrates, it is possible to suppress the transmission of the vibrations to the delivery tube70via the support members, the main body case20, and the like.

(3) According to the above-described embodiment, when viewed from the height direction Td, the virtual line segment VLf farthest from the rotation axis RA among the virtual line segments that may be drawn between the first support member121and the second support member122does not intersect the fan50. Due to this, portions of the fan unit60of the blower40in contact with the first support member121and the second support member122are close to the delivery tube70accordingly. Thus, by the support at a position close to the connection point CP between the delivery tube70and the fan unit, the transmission of the vibrations to the delivery tube70may be reliably suppressed.

(4) In the above-described configuration, because the fan unit60is firmly supported by the first support member121and the second support member122, vibrations may occur in the fan unit60taking a virtual line segment that may be drawn between the first support member121and the second support member122as the axis in a case where the vibrations are assumed to occur in the fan unit60. Of the virtual line segments, the virtual line segment VLf farthest from the rotation axis RA of the fan50does not intersect the fan50. Therefore, when vibrations occur in the fan unit60taking the virtual line segment VLf as the axis, there is a high possibility that the entire fan50integrally vibrates. Accordingly, it is possible to suppress the occurrence of distortion or the like in the fan50when the fan50attempts to locally vibrates.

(5) In the above-described embodiment, when viewed from the height direction Td, some of the virtual line segments that may be drawn between the first support member121and the second support member122do not intersect any of the fan50and the delivery tube70. This makes it possible to prevent a situation in which the vibrations of the fan unit60and the vibrations of the delivery tube70interfere with each other taking the virtual line segment as a boundary.

(6) According to the above-described embodiment, when viewed from the height direction Td, the first support member121and second support member122are disposed in the first region E1 on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA. On the other hand, when viewed from the height direction Td, the third support member123is disposed in the second region E2 on the opposite side to the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA. That is, when the blower40vibrates taking a virtual line segment connecting the first support member121and the second support member122as the axis, a side thereof where the vibrations become large is supported by the third support member123. That is, the third support member123is disposed at a position where the vibrations of the blower40may be more effectively suppressed.

(7) In the above-described embodiment, when viewed from the height direction Td, only the third support member123is disposed as a support member on the opposite side to the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA. That is, the support force is weaker on the side opposite to the delivery tube70side with the connection point CP as a reference. Accordingly, even when vibrations occur in the blower40, the blower40is likely to vibrate on the side opposite to the delivery tube70, and thus the vibrations on the delivery tube70side are minimized.

(8) According to the above-described embodiment, the second distance D2 between the first support member121and the third support member123is equal to the third distance D3 between the second support member122and the third support member123. As a result, when a virtual straight line passing through the rotation axis RA is drawn from the fixing center of the third support member123, it is possible to suppress the occurrence of distortion in the fan unit60due to the uneven vibrations of the blower40on both sides of the virtual straight line.

(9) According to the above-described embodiment, the third support member123is disposed on the straight line VA passing through the rotation axis RA of the fan50and the connection point CP. Thus, the vibrations absorbed by the third support member123are unlikely to be transmitted to the delivery tube70by fixing the blower40at a portion farthest from the delivery tube70with the third support member123.

(10) According to the above-described embodiment, each of the three support members is disposed at the outer side portion of the fan unit60when viewed from the height direction Td. The three support members support the blower40from the outside. As a result, even in a case where the blower40vibrates in a direction orthogonal to the rotation axis RA when the fan50rotates, it is easy to suppress the vibrations in such a direction.

(11) According to the above-described embodiment, the first damper111is supported by the first support member121. The first damper111is constituted of the inner portion111A and the outer portion111B. When the inner portion111A vibrates, the vibrations transmitted to the outer portion111B are reduced. With this, the vibrations of the fan unit60are attenuated before being transmitted to the first support member121via the first damper111. The same applies to the second damper112and the third damper113in this respect.

The above-described embodiment may be modified as follows. The above-described embodiment and the following modifications may be combined and implemented within a range in which there is no technical contradiction.

In the above-described embodiment, the CPAP device10may include a humidifier. For example, a humidifier may be attached to the discharge tube90of the main body case20, and the hose130may be attached to the discharge side of the humidifier. Further, for example, a humidifier may be housed inside the main body case20, and the humidifier may be arranged between the delivery tube70and the discharge tube90. In this case, the air delivered from the delivery tube70is humidified by the humidifier and reaches the user150from the discharge tube90through the hose130.

In the above-described embodiment, the shape of the main body case20is not limited to the example of the embodiment described above. The shape may take a polygonal shape or a spherical shape. The shapes and positions of the inhalation port22, the discharge tube90, and the like of the main body case20are not limited to the example of the above-described embodiment. For example, the shape of the inhalation port22may be circular, and the discharge tube90may pass through an end surface facing the opposite side to the first end surface20A, where the inhalation port22is located.

In the above-described embodiment, the shape of the blower40is not limited to the example of the embodiment described above. For example, in the case where the housing space of the fan case61of the fan unit60for housing the fan50has a circular shape when viewed from the height direction Td, the outer shape of the fan case61may take a rectangular parallelepiped shape or a polygonal shape. Further, for example, the delivery tube70may extend in such a manner as to widen the inside diameter thereof, or may be curved.

In the above-described embodiment, the locations where the first support member121and the second support member122are disposed are not limited to the example of the embodiment described above. For example, when viewed from the height direction Td, it is sufficient that the locations thereof are on the side of the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA in the circumferential direction of the fan case61. As the first support member121and the second support member122are disposed farther away from the delivery tube70, it is possible to suppress the transmission of vibration to the delivery tube70via these support members.

For example, the first support member121and the second support member122may be disposed in such a manner as to pinch the delivery tube70when viewed from the height direction Td. In this case, when viewed from the height direction Td, any of the virtual line segments that may be drawn between the first support member121and the second support member122does not intersect the fan50. When the first support member121and the second support member122are disposed as in this modification example, the distortion or the like of the fan50may be suitably suppressed.

Further, for example, in a modification example illustrated inFIG.7, when viewed from the height direction Td, the first support member121and the second support member122are set far from the rotation axis RA in terms of the locations in the radial direction of the fan50. Specifically, as compared with the embodiment illustrated inFIG.3, the amount of extension of each of the first projection66and the second projection67is large toward an outer side portion in the radial direction of the fan50. In this case, of virtual line segments that may be drawn between the first support member121and the second support member122, a virtual line segment farthest from the rotation axis RA among the virtual line segments orthogonal to the straight line VA is taken as a first virtual line segment VL1, and a virtual line segment closest to the rotation axis RA is taken as a second virtual line segment VL2. A virtual line segment passing through the center between the first virtual line segment VL1 and the second virtual line segment VL2 in the direction in which the straight line VA extends, is taken as an intermediate virtual line segment VLm. That is, the intermediate virtual line segment VLm is an intermediate virtual line segment equally distanced from the first virtual line segment VL1 and the second virtual line segment VL2. In the example illustrated inFIG.7, the intermediate virtual line segment VLm intersects neither the fan50nor the delivery tube70when viewed from the height direction Td. This makes it possible to prevent a situation in which the vibrations of the fan unit60and the vibrations of the delivery tube70interfere with each other taking the intermediate virtual line segment VLm as a boundary.

In the above-described embodiment, all of the virtual line segments that may be drawn between the first support member121and the second support member122may intersect the fan50. Any of the virtual line segments may intersect none of the fan50and the delivery tube70.

In the above-described embodiment, the location where the third support member123is disposed is not limited to the example of the embodiment described above. For example, when viewed from the height direction Td, it is sufficient that the location is on the side opposite to the connection point CP between the fan unit60and the delivery tube70relative to the rotation axis RA. It is preferable that the second distance D2 between the first support member121and the third support member be longer than the first distance D1 between the first support member121and the second support member122, and the third distance D3 between the second support member122and the third support member123be longer than the first distance D1 between the first support member121and the second support member122, in order to suppress the vibrations of the entire fan unit60. However, the third support member123may be disposed at such a location that causes the second distance D2 to be shorter than the first distance D1, or may be disposed at such a location that causes the third distance D3 to be shorter than the first distance D1. Furthermore, the third support member123may be disposed in such a manner that the second distances D2 and the third distances D3 are different from each other.

For example, it is not necessary for the third support member123to be located on the straight line VA passing through the rotation axis RA and the connection point CP. In this case as well, when viewed from the height direction Td, it is sufficient that the location is at least on the side opposite to the connection point CP relative to the rotation axis RA, in other words, the location is within the second region E2.

In the above-described embodiment, each support member is fixed to the bottom of the main body case20, but a location where the support member is fixed to the main body case20is not limited to the example of the embodiment described above. For example, each support member may be fixed to a side surface, a lid surface, or the like of the main body case20.

In the above-described embodiment, the constitution of each of the support members is not limited to the example of the embodiment described above. For example, the fan unit60may be provided with none of the projections and dampers, and may be supported to the main body case20by directly fixing the fan case61with bolts. In this case, the bolt functions as a support member.

In the above-described embodiment, the number of locations at which the blower40is supported may be four or more. For example, the fan unit60may be supported by the fourth support member. In this case, when viewed from the direction of the rotation axis RA of the fan50, it is preferable that the fourth support member be disposed on the side of the connection point CP between the fan unit60and the delivery tube70in terms of suppressing the vibrations on the delivery tube70side of the fan unit60.

In the above-described embodiment, the extending direction of each projection is not limited to the direction extending toward the outer side portion when viewed from the height direction Td, and may extend in the height direction Td, for example. For example, the first damper111may be disposed on the upper side of the fan unit60, the second damper112may be disposed on the lower side of the fan unit60, and the first support member121and the second support member122may support each of the dampers. In this case, the first support member121and the second support member122are disposed to pinch the fan unit60therebetween in the height direction Td.10CPAP DEVICE20MAIN BODY CASE40BLOWER50FAN60FAN UNIT70DELIVERY TUBE80MOTOR90DISCHARGE TUBE111FIRST DAMPER112SECOND DAMPER113THIRD DAMPER121FIRST SUPPORT MEMBER122SECOND SUPPORT MEMBER123THIRD SUPPORT MEMBERCP CONNECTION POINTRA ROTATION AXISVL VIRTUAL LINE SEGMENT