JPWO2017217440A1 - Blower - Google Patents

Abstract

The blower (10) includes a housing (12), a blower (21), and a circuit board (13). The housing (12) has a suction port (121). The air blower (21) includes a fan (22), a motor (23) that rotates the fan (22), and a fan case (24) having a suction port (243) and a discharge port (244). A control circuit for driving and controlling the motor (23) is formed on the circuit board (13). The air blower (21) and the circuit board (13) are disposed in the housing (12). The blower (21) sucks gas from the suction port (121), sucks the gas from the suction port (243), and discharges it from the discharge port (244). The circuit board (13) faces the first space (17) that connects the suction port (121) and the suction port (243).

Description

  The present invention relates to a blower that blows gas.

  Traditionally, continuous positive airway pressure therapy (CPAP) has been used to treat obstructive sleep apnea syndrome (OSAS). In continuous positive airway pressure therapy, a blower that blows air or an air-oxygen mixture is used. As a conventional air blower, there exists an airflow generator of patent document 1, for example. The airflow generator includes a blower, a blower enclosure made of a composite of metal and polymer, and an outer case made of hard plastic. The blower is supported by a winding spring and installed in the blower enclosure. The blower enclosure is installed in the outer case. In this airflow generator, the blower is supported by a winding spring, and the blower is installed in the blower enclosure, so that noise and vibration generated from the blower are reduced from being transmitted to the outside of the airflow generator. Is done.

Special table 2008-518640

  In the airflow generator described in Patent Document 1, the blower is installed in the blower enclosure, and the blower enclosure is installed in the outer case. The blower enclosure is made of a composite of metal and polymer. For this reason, the airflow generator becomes very large and heavy.

  The objective of this invention is providing the small and lightweight air blower with which the noise at the time of operation | movement was reduced.

(1) The blower of the present invention includes a housing, a blower, and a circuit board. The housing has an inlet. The air blower includes a fan, a motor that rotates the fan, and a fan case having a suction port and a discharge port. A control circuit for driving and controlling the motor is formed on the circuit board. The blower and the circuit board are disposed in the housing. The blower sucks gas from the suction port, sucks the gas from the suction port, and discharges the gas from the discharge port. The circuit board faces the first space that communicates the suction port and the suction port.

  In this configuration, since the first space for the silencer communicates the suction port and the suction port, noise generated in the blower and coming out from the suction port of the housing is reduced. For this reason, noise during operation of the blower is reduced. In addition, since the circuit board is also used as a part of the wall constituting the silencer, the blower can be reduced in size and weight. Further, since the circuit board itself functions as a muffling member, noise generated in the blower and exiting from the suction port of the housing is reduced.

(2) The housing may further have a discharge port.

(3) The discharge port and the discharge port may be communicated with each other.

(4) The circuit board may be fixed to the inner wall surface of the housing.

(5) The blower of the present invention may further include an electronic component for a motor driver provided on the main surface facing the inside of the housing of the circuit board. In this configuration, the electronic components for the motor driver that generate a large amount of heat are cooled by the air sucked from the suction port of the housing, so that the operation efficiency and reliability of the electronic components are improved.

(6) The blower of the present invention may further include an input / output interface provided on a main surface facing the outside of the casing of the circuit board. In this configuration, since it becomes easy to provide the input / output interface outside the housing, it is possible to further reduce the size of the blower.

(7) The air blower of the present invention may further include a sound absorbing material facing the first space. With this configuration, the silencing performance of the silencer is improved.

(8) The air blower of the present invention may further include a muffler speaker facing the first space. With this configuration, the silencing performance of the silencer is improved.

(9) The blower of the present invention includes a mask or a cannula, a hose having a first end connected to a portion of the fan case where the discharge port is formed, and a second end connected to the mask or cannula. , May be further provided.

(10) The blower of the present invention includes a mask or a cannula, a hose having a first end connected to a portion of the housing where the discharge port is formed, and a second end connected to the mask or cannula. , May be further provided.

(11) A second space that communicates the discharge port and the discharge port may be formed in the housing. In this configuration, since the second space for the silencer communicates the discharge port and the discharge port, noise that occurs in the blower and exits from the discharge port of the housing is reduced.

(12) The circuit board may face the second space. In this configuration, since the circuit board is also used as a part of the wall that defines the second space, the air blower can be reduced in size and weight even when the second space is formed in the housing.

(13) The blower according to the present invention further includes an electronic component placement space formed in the housing and partitioning the electronic component placement space, the second space, and the electronic component placement space. The outlet has a communication port that communicates with the electronic component placement space, the casing has an exhaust port that communicates with the electronic component placement space, and the electronic component may be disposed between the communication port and the exhaust port. Good. In this configuration, since the electronic component arrangement space exhibits a silencing effect, noise during operation of the blower can be reduced. In addition, the exhaust heat generated in the electronic component can be discharged outside the blower by the air discharged from the exhaust port.

  ADVANTAGE OF THE INVENTION According to this invention, the small and lightweight air blower with which the noise at the time of operation | movement was reduced is realizable.

FIG. 1 is an external perspective view of the blower 10 according to the first embodiment. FIG. 2 is a cross-sectional view of a main part of the blower 10 according to the first embodiment. FIG. 3 is a plan view of the air blowing unit 21. FIG. 4 is a cross-sectional view of a main part of a blower device according to a modification of the first embodiment. FIG. 5 is an external perspective view of the blower 60 according to the second embodiment. FIG. 6 is a cross-sectional view of a main part of the blower 60 according to the second embodiment. FIG. 7 is a cross-sectional view of the main part of the blower according to the third embodiment. FIG. 8 is a cross-sectional view of a main part of the blower according to the fourth embodiment. FIG. 9 is a cross-sectional view of a main part of a blower according to a modification of the fourth embodiment. FIG. 10 is a cross-sectional view of a main part of the blower according to the fifth embodiment.

  Hereinafter, several specific examples will be given with reference to the drawings to show a plurality of modes for carrying out the present invention. In each figure, the same reference numerals are assigned to the same portions. In consideration of ease of explanation or understanding of the main points, the embodiments are shown separately for convenience, but the components shown in different embodiments can be partially replaced or combined. In the second and subsequent embodiments, description of matters common to the first embodiment is omitted, and only different points will be described. In particular, the same operation effect by the same configuration will not be sequentially described for each embodiment.

<< First Embodiment >>
FIG. 1 is an external perspective view of the blower 10 according to the first embodiment. The housing 12 has a thin box shape. An input / output interface such as a liquid crystal display 15 and an operation switch 16 is provided on the upper surface of the housing 12. A nozzle 242 of a fan case 24 (see FIG. 2) extends on the side surface of the housing 12. A discharge port 244 is formed in the nozzle 242. A first end of the hose 31 is attached to the nozzle 242. A mask 32 is attached to the second end of the hose 31. That is, the first end of the hose 31 is connected to a portion of the fan case 24 where the discharge port 244 is formed. The second end of the hose 31 is connected to the mask 32. The mask 32 is attached to the mouth and nose of the patient U. Thereby, the discharge port 244 of the ventilation part 21 (refer FIG. 2) and the patient's U airway communicate. Note that a cannula may be connected to the second end of the hose 31 instead of the mask 32.

  FIG. 2 is a cross-sectional view of a main part of the blower 10 according to the first embodiment. The blower 10 is used, for example, for continuous positive airway pressure therapy (CPAP) performed as a treatment for obstructive sleep apnea syndrome (OSAS).

  The blower device 10 includes a housing 12, a circuit board 13, and a blower unit 21. The housing 12 has a suction port 121. The circuit board 13 and the air blowing unit 21 are disposed in the housing 12. The air blowing unit 21 includes a fan 22, a motor 23 that rotates the fan 22, and a fan case 24 having a suction port 243 and a discharge port 244. The air blowing unit 21 sucks air from the suction port 121, sucks the air from the suction port 243, and discharges the air from the discharge port 244. A control circuit for driving and controlling the motor 23 is formed on the circuit board 13. The circuit board 13 is formed in the housing 12 and faces the first space 17 that communicates the suction port 121 and the suction port 243. The first space 17 is an example of the “first space” in the present invention.

  The housing 12 includes an upper surface portion, a lower surface portion, and a side surface portion. A suction port 121 is formed on the side surface of the housing 12, and a discharge port 244 of the fan case 24 is disposed. The air blower 21 is fixed in the housing 12 by a support member (not shown) such as a spring. The air blowing unit 21 is disposed so as to be separated from the suction port 121 of the housing 12.

  FIG. 3 is a plan view of the air blowing unit 21. As shown in FIGS. 2 and 3, the fan case 24 includes a main body 241 and a nozzle 242. The main body 241 is arranged so that its main surface is substantially parallel to the main surface of the housing 12. The main body 241 is substantially circular in plan view (viewed from a direction perpendicular to the main surface of the housing), and the nozzle 242 extends in a direction substantially tangential to the circle in plan view. The discharge port 244 is formed by the nozzle 242 extending from the side surface of the main body 241. The nozzle 242 extends to the outside of the housing 12 through an opening formed in the side surface portion of the housing 12. A suction port 243 is formed on the lower surface of the main body 241 of the fan case 24.

  The fan 22 is accommodated in the main body 241. The fan 22 includes a substantially disc-shaped first holding plate, a substantially disc-shaped second holding plate, and a plurality of blades held between the first holding plate and the second holding plate. The fan 22 is disposed so that the main surfaces of both the first holding plate and the second holding plate are substantially parallel to the main surface of the main body 241. The motor 23 is provided on the upper surface of the main body 241. The fan 22 is attached to the shaft of the motor 23. The rotation axis of the fan 22 substantially coincides with the normal direction of the main surface of the housing 12. The rotation axis of the fan 22 passes through substantially the center of the fan 22 in plan view. In plan view, the centers of the main body 241, the fan 22, and the suction port 243 substantially coincide. The motor 23 rotates the fan 22. As a result, air is sucked from the suction port 243, moves along the outer peripheral portion of the fan 22 while being pressurized, and is discharged from the discharge port 244.

  Although not particularly shown in the drawings, the air blowing unit 21 may be configured such that the motor 23 is provided on the lower surface of the main body 241 and the suction port 243 is provided on the upper surface of the main body.

  As described above, the circuit board 13 is disposed in the housing 12. The circuit board 13 is fixed to the inner wall surface of the housing 12. The circuit board 13 is disposed so as to be close to the upper surface portion of the housing 12. The circuit board 13 is disposed so that the main surface of the circuit board 13 and the main surface of the upper surface portion of the housing 12 face each other. The circuit board 13 is preferably disposed near the suction port 121 of the housing 12. An input / output interface such as a liquid crystal display 15 and an operation switch 16 is provided on the main surface of the circuit board 13 that faces the main surface of the upper surface of the housing 12. That is, an input / output interface is provided on the main surface of the circuit board 13 facing the outside of the housing 12. Input / output interfaces such as the liquid crystal display 15 and the operation switch 16 are exposed to the outside of the housing 12 through an opening formed in the upper surface portion of the housing 12. The liquid crystal display 15 displays, for example, setting information of the blower 10 such as supply pressure. The operation switch 16 is, for example, a switch for switching on / off the power supply, a switch for changing setting information of the blower, or the like.

  A control circuit, a motor driver, a power supply circuit, and the like are formed on the circuit board 13. The control circuit controls the motor driver based on setting information set via the operation switch 16. The motor driver drives the motor 23 based on a command from the control circuit. The power supply circuit generates power necessary for the control circuit, the motor driver, and the like. On the main surface of the circuit board 13 opposite to the main surface on which the input / output interface is provided, electronic components 14 constituting a control circuit, a motor drive, a power supply circuit, and the like are mounted. That is, an electronic component 14 used for a control circuit, a motor driver, a power supply circuit and the like is provided on the main surface of the circuit board 13 facing the inside of the housing 12. The electronic component 14 includes an electronic component having a large calorific value, such as an FET, used for a motor driver, a power supply circuit, or the like.

  The first space 17 is a space for a silencer that reduces noise generated in the blower unit 21 and coming out of the blower 10. The sound reduction performance of the silencer increases as the volume of the first space 17 increases. The first space 17 is formed in the housing 12 and communicates the suction port 121 of the housing 12 and the suction port 243 of the fan case 24. The first space 17 does not include a space 18 that is not communicated with the suction port 121 of the housing 12 or the suction port 243 of the fan case 24 in the space in the housing 12. The first space 17 is a sealed space except that it communicates with the suction port 121 of the housing 12 and the suction port 243 of the fan case 24. The member facing the first space 17 is also used as a wall (soundproof wall) constituting the silencer. The circuit board 13 faces the first space 17. Of the main surfaces of the circuit board 13, the main surface (mounting surface) on which the electronic component 14 is mounted faces the first space 17. The circuit board 13 is also used as a part of the wall constituting the silencer.

  A sound absorbing material, a muffler speaker (both not shown), and the like may be provided in the housing 12 so as to face the first space 17. The sound absorbing material absorbs noise generated in the blower unit 21. The muffler speaker cancels the noise generated in the blower unit 21 by generating a sound having a phase opposite to that of the noise generated in the blower unit 21. The sound absorbing material is provided, for example, on the inner wall surface of the housing 12. The muffler speaker is mounted on the mounting surface of the circuit board 13, for example.

  When the motor 23 is driven, the fan 22 rotates. Thus, air is sucked from the suction port 121 of the housing 12, passes through the first space 17, and is sucked from the suction port 243 of the fan case 24. The sucked air is pressurized by the blower unit 21 and discharged to the outside from the discharge port 244. The discharged air flows into the mask 32 through the hose 31 and then flows into the airway from the mouth and nose of the patient U. Thereby, the air blower 10 supplies the pressurized air to the patient U's airway. The blower 10 applies a pressure of, for example, 4 cmH 2 O or more and 20 cmH 2 O or less to the patient U's airway. As a result, the air blower 10 can prevent the patient U's airway from being blocked during sleep and causing the patient U to become apnea.

  When the fan 22 rotates, noise is generated in the blower unit 21. Noise generated in the blower 21 is mainly caused by wind noise caused by the rotation of the fan 22. On the other hand, the discharge port 244 is closed because it communicates with the patient U's airway via the hose 31 when the blower 10 is used. On the other hand, the inlet 121 of the housing 12 is opened to the outside of the blower 10. For this reason, the noise generated in the blower unit 21 mainly goes out of the blower 10 through the suction port 121 of the housing 12. In the first embodiment, since the first space 17 communicates with the suction port 121 of the housing 12 and the suction port 243 of the fan case 24, it is generated in the blower unit 21 and exits from the suction port 121 of the housing 12. The noise that goes is reduced. For this reason, the noise at the time of operation | movement of the air blower 10 is reduced.

  In the first embodiment, the circuit board 13 is also used as a part of the wall constituting the silencer. For this reason, it becomes possible to reduce the size and weight of the blower compared to the case where a wall constituting the silencer is separately provided instead of the circuit board 13. Further, since the circuit board 13 itself functions as a muffling member, noise generated in the blower 21 and exiting from the suction port 121 of the housing 12 is reduced.

  Further, the mounting surface of the circuit board 13 faces the first space 17. For this reason, the electronic component 14 mounted on the circuit board 13 is cooled by the air sucked from the suction port 121 of the housing 12 and flowing in the first space 17, so that the operation efficiency and reliability of the electronic component 14 are improved. improves. This effect becomes conspicuous when an electronic component having a large calorific value is mounted on the circuit board 13.

  In addition, the air sucked from the suction port 121 of the housing 12 is warmed by the heat generated in the electronic component 14. Thereby, it can prevent that dew condensation generate | occur | produces in the air blower 10. FIG. Moreover, since the warmed air is supplied to the patient U, the comfort of the patient U is improved. Furthermore, the power consumption of the blower 10 is reduced as compared with the case where the air is warmed by a separately provided heating device. By mounting an electronic component with a large amount of heat generation on the circuit board 13, these effects become remarkable.

  Next, a modification of the first embodiment will be described. In the modification of the first embodiment, the discharge port formed in the fan case communicates with the discharge port formed in the housing. FIG. 4 is a cross-sectional view of a main part of a blower device according to a modification of the first embodiment. The housing 42 includes a main body 422, a nozzle 423, and a discharge port 424. The main body 422 of the housing 42 is a part that houses the blower 51, the circuit board 13, and the like. The nozzle 423 of the housing 42 extends from the main body 422 of the housing 42, whereby the discharge port 424 is formed. The nozzle 542 of the fan case 54 is joined to the nozzle 423 of the housing 42. The discharge port 544 of the fan case 54 communicates with the discharge port 424 of the housing 42. A first end of the hose 31 (see FIG. 1) is connected to the nozzle 423 of the housing 42. That is, the first end of the hose 31 is connected to a portion of the housing 42 where the discharge port 424 is formed. The second end of hose 31 is connected to mask 32 or cannula (not shown).

<< Second Embodiment >>
In 2nd Embodiment, a circuit board is arrange | positioned so that the whole upper surface of a ventilation part may be covered. FIG. 5 is an external perspective view of the blower 60 according to the second embodiment. FIG. 6 is a cross-sectional view of a main part of the blower 60 according to the second embodiment. The circuit board 63 faces substantially the entire upper surface portion of the housing 12. The air blowing unit 21 is disposed between the circuit board 63 and the lower surface of the housing 12. The air blower 21 is disposed so as to overlap the circuit board 63 in plan view.

  In the second embodiment, a portion where the housing 12 and the circuit board 63 overlap in a plan view is widened. For this reason, when the circuit board having the same size as that of the first embodiment is used, the blower can be downsized.

  Furthermore, by disposing the circuit board 63 so as to cover substantially the entire upper surface portion of the housing 12, it is possible to further reduce noise leakage to the outside of the housing 12 and enhance the silencing effect.

<< Third Embodiment >>
In the third embodiment, a part of the circuit boards is arranged so as to be orthogonal to the main surface of the housing, and the circuit boards face the first space. FIG. 7 is a cross-sectional view of the main part of the blower according to the third embodiment. The circuit board 73A is disposed so as to face the upper surface portion of the housing 72. The circuit board 73A does not overlap the blower 21 in plan view. The circuit board 73A is provided with input / output interfaces such as the liquid crystal display 15 and the operation switch 16.

  The circuit board 73 </ b> B is arranged so that its main surface is orthogonal to the main surface of the upper surface portion of the housing 72. The first end surface of the circuit board 73 </ b> B contacts the upper surface portion of the housing 72. The second end surface of the circuit board 73 </ b> B contacts the lower surface portion of the housing 72. The circuit board 73B is disposed between the circuit board 73A and the blower unit 21. The electronic component 14 is mounted on the main surface of the circuit board 73B on the air blowing unit 21 side. In other words, the blower unit 21 is disposed on the mounting surface side of the circuit board 73B. The mounting surface of the circuit board 73 </ b> B faces the first space 77. The first space 77 includes a space surrounded by the casing 72, the circuit board 73 </ b> B, and the blower unit 21. The suction port 721 is formed on the side surface of the casing 72 so that the opening surface thereof is orthogonal to the main surface of the circuit board 73B. The suction port 721 is disposed on the mounting surface side of the circuit board 73B so as to be close to the mounting surface of the circuit board 73B. Thereby, since the air sucked from the suction port 721 passes by the electronic component 14, the electronic component 14 is easily cooled.

  In the third embodiment, the circuit board 73 </ b> B is arranged to be a partition plate that partitions the inside of the housing 72. For this reason, since the wall which comprises a silencer can be provided easily, an air blower can be manufactured easily.

  In addition, the flow of gas in the first space 77 can be easily rectified, and the cooling effect of the circuit board 73B can be further enhanced.

<< Fourth Embodiment >>
In the fourth embodiment, a space is formed not only on the suction port side of the blower unit but also on the discharge port side of the blower unit. FIG. 8 is a cross-sectional view of a main part of the blower according to the fourth embodiment. The air blower of 4th Embodiment has the external appearance similar to the air blower 60 of 2nd Embodiment (refer FIG. 5). The housing 82 includes a main body 822, a discharge port 824, and a wall 825. The main body part 822 is a part that houses the air blowing part 21, the circuit board 83, and the like. The discharge port 824 is formed on the side surface of the main body 822. The wall 825 is formed in the main body 822 so that the wall surface is orthogonal to the main surface of the main body 822. The wall 825 is disposed between the suction port 121 of the housing 82 and the discharge port 824 of the housing 82. The air blowing unit 21 is disposed between the suction port 121 of the housing 82 and the wall 825. The nozzle 242 of the blower unit 21 extends between the discharge port 824 of the housing 82 and the wall 825 through an opening formed in the wall 825. The circuit board 83 faces substantially the entire upper surface portion of the housing 82.

  A first space 87A and a second space 87B are formed in the main body 822 of the housing 82. The second space 87B is an example of the “second space” in the present invention. The first space 87A communicates the suction port 121 of the housing 82 and the suction port 243 of the blower unit 21. The second space 87 </ b> B communicates the discharge port 244 of the blower unit 21 and the discharge port 824 of the housing 82. The wall 825 is formed so that the first space 87 </ b> A and the second space 87 </ b> B do not communicate with each other without passing through the suction port 243 and the discharge port 244 of the blower unit 21. The circuit board 83 faces the first space 87A and the second space 87B. The electronic component 14 is mounted on the circuit board 83 so as to face the first space 87A. Some of the electronic components 14 may be mounted on the circuit board 83 so as to face the second space 87B.

  In 4th Embodiment, since the 1st space 87A and the 2nd space 87B are formed, the noise which came out from the suction port 243 and the discharge port 244 of the ventilation part 21 is reduced. For this reason, the noise at the time of operation | movement of an air blower can be further reduced compared with the case where space is formed only in the suction opening side of a ventilation part.

  Next, a modification of the fourth embodiment will be described. In the modification of the fourth embodiment, the space formed on the discharge port side of the blower is divided into a second space that communicates with the discharge port and an electronic component placement space in which electronic components are placed. FIG. 9 is a cross-sectional view of a main part of a blower according to a modification of the fourth embodiment. A housing 102 of the blower device includes a main body 1022 and a wall 1025. The main body portion 1022 accommodates the air blowing portion 21, the circuit boards 83, 103, and the like. A discharge port 824 and an exhaust port 1027 are formed in the side surface portion 1028 of the main body portion 1022. A hose 31 (see FIG. 5) is connected to a portion of the housing 102 where the discharge port 824 is formed. The discharge port 824 communicates with the airway of the patient U (see FIG. 5). The exhaust port 1027 communicates with the outside of the blower.

  The wall 1025 extends from the wall 825 so that the wall surface thereof is substantially parallel to the main surface of the upper surface portion of the housing 102. The circuit board 103 is fixed between the wall 1025 and the side surface portion 1028 so that the main surface thereof is substantially parallel to the main surface of the upper surface portion of the housing 102. An electronic component 104 is mounted on the circuit board 103. The wall 1025 and the circuit board 103 divide (partition) a space in the housing 102 formed between the wall 825 and the side surface portion 1028 into a second space 107B and an electronic component placement space 107C. The electronic component 104 is arranged in the electronic component arrangement space 107C. The configuration including the wall 1025 and the circuit board 103 is an example of the “partition section” in the present invention. The wall 825 is formed with a communication port 1026 that communicates the second space 107B and the electronic component placement space 107C. The discharge port 244 of the blower unit 21 communicates with the second space 107B. The discharge port 244 of the blower unit 21 communicates with the electronic component placement space 107C through the second space 107B and the communication port 1026. The discharge port 824 communicates with the second space 107B. The exhaust port 1027 communicates with the electronic component placement space 107C. The electronic component 104 is disposed between the communication port 1026 and the exhaust port 1027.

  Most of the air discharged from the discharge port 244 of the blower unit 21 passes through the second space 107B, is discharged from the discharge port 824, and flows into the airway of the patient U. Part of the air discharged from the discharge port 244 of the blower unit 21 is discharged from the exhaust port 1027 to the outside of the blower through the communication port 1026 and the electronic component placement space 107C.

  In the modification of 4th Embodiment, the communication port 1026 which connects the discharge port 244 of the ventilation part 21 and the electronic component arrangement space 107C is provided. Thereby, since the electronic component arrangement space 107C exhibits a silencing effect, noise during operation of the blower can be reduced. In addition, the electronic component 104 is disposed in the electronic component placement space 107 </ b> C and is disposed between the communication port 1026 and the exhaust port 1027. Part of the air discharged from the discharge port 244 of the blower unit 21 flows into the electronic component placement space 107C from the communication port 1026, passes through the electronic component placement space 107C, and is discharged from the exhaust port 1027 to the outside of the blower. Is done. Thereby, the exhaust heat generated in the electronic component 104 can be discharged to the outside of the blower.

  In the modification of the fourth embodiment, the blower is configured such that the bottom surface of the housing 102 faces the second space 107B and the circuit board 83 faces the electronic component placement space 107C. Although shown, the air blower may be configured such that the second space 107B faces the circuit board 83 and the electronic component placement space 107C faces the bottom surface of the housing 102.

<< Fifth Embodiment >>
In the fifth embodiment, the first space and the third space separated by the wall are communicated by the communication port. FIG. 10 is a cross-sectional view of a main part of the blower according to the fifth embodiment. The housing 92 has a main body 922 and a wall 925. The main body portion 922 is a portion that houses the blower portion 21, the circuit board 93, and the like. The wall 925 is formed in the main body 922 such that the wall surface is orthogonal to the main surface of the main body 922. The wall 925 is disposed between the blower 21 and the circuit board 93. The interior of the housing 92 is partitioned by the wall 925, whereby the first space 97A and the third space 97B are formed. The first space 97 </ b> A communicates with the outside of the housing 92 through the suction port 121 of the housing 92. The mounting surface of the circuit board 93 faces the first space 97A. The air blower 21 faces the third space 97B. The wall 925 is formed with a communication port 926 that communicates the first space 97A and the third space 97B. The suction port 121 of the housing 92 and the suction port 243 of the fan case 24 are communicated via the first space 97A, the third space 97B, and the communication port 926.

  In the fifth embodiment, the silencing effect can be enhanced by reducing the opening area of the communication port 926 formed in the wall 925. However, if the opening area of the communication port 926 is excessively small, the flow of air from the suction port 121 of the housing 92 to the suction port 243 of the fan case 24 is hindered. For this reason, the opening area of the communication port 926 is appropriately determined as long as the air flow is not hindered.

  In the above embodiment, an example in which the blower discharges air has been described. However, the blower may discharge a gas such as an air-oxygen mixed gas.

U ... Patient 10, 60 ... Blower 12, 42, 72, 82, 92, 102 ... Housing 13, 63, 73A, 73B, 83, 93, 103 ... Circuit board 14, 104 ... Electronic component 15 ... Liquid crystal display 16 ... operation switches 17, 77, 87A, 97A ... first space 87B, 107B ... second space 97B ... third space 18 ... space 21, 51 ... air blower 22 ... fan 23 ... motor 24, 54 ... fan case 31 ... hose 32 ... Mask 107C ... Electronic component placement spaces 121, 721 ... Suction ports 241, 422, 822, 922, 1022 ... Body parts 242, 423, 542 ... Nozzle 243 ... Suction ports 244, 544 ... Ejection ports 424, 824 ... Ejection ports 825,925,1025 ... walls 926,1026 ... communication port 1027 ... exhaust port 1028 ... side portion

Claims (13)

A housing having a suction port;
A fan, a motor that rotates the fan, and a fan case having a suction port and a discharge port;
A blower provided with a circuit board on which a control circuit for driving and controlling the motor is formed,
The blower and the circuit board are disposed in the housing,
The blowing section sucks gas from the suction port, sucks the gas from the suction port, and discharges it from the discharge port,
The circuit board faces a first space that communicates the suction port and the suction port.   The blower according to claim 1, wherein the housing further has a discharge port.   The air blower according to claim 2, wherein the discharge port and the discharge port communicate with each other.   The air blower according to any one of claims 1 to 3, wherein the circuit board is fixed to an inner wall surface of the housing.   The blower according to any one of claims 1 to 4, further comprising an electronic component for a motor driver provided on a main surface of the circuit board facing the inside of the casing.   The blower device according to claim 4, further comprising an input / output interface provided on a main surface of the circuit board facing the outside of the housing.   The blower according to any one of claims 1 to 6, further comprising a sound absorbing material facing the first space.   The air blower according to any one of claims 1 to 7, further comprising a muffler speaker facing the first space. A mask or cannula,
The hose having a first end connected to a portion of the fan case where the discharge port is formed and a second end connected to the mask or the cannula. Blower device. A mask or cannula,
The hose having a first end connected to a portion of the housing in which the discharge port is formed and a second end connected to the mask or the cannula. The blower described.   The air blower according to claim 2 or 3, wherein a second space communicating the discharge port and the discharge port is formed in the housing.   The air blower according to claim 11, wherein the circuit board faces the second space. An electronic component placement space formed in the housing and in which electronic components are placed;
A partition that partitions the second space and the electronic component placement space;
The partition portion has a communication port that communicates the discharge port and the electronic component placement space;
The housing has an exhaust port communicating with the electronic component placement space;
The blower according to claim 11 or 12, wherein the electronic component is disposed between the communication port and the exhaust port.

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