Air supply devices and fluid control devices

Abstract

The air supply device (10A) comprises: an air blower (50); and a casing (20) for accommodating the air blower (50), wherein the casing (20) has an air intake hole (41a) for allowing fluid to flow in when the air blower (50) is driven, and an exhaust portion for exhausting the fluid when the air blower (50) is driven. The casing (20) can be extended and retracted to make the internal volume of the casing (20) variable.

Description

[0001] This application is a divisional application of an application filed on March 30, 2018, with application number 2018 8 0024 048.2 (international application number PCT / JP2018 / 013826), and invention name “AIR SUPPLY DEVICE AND FLUID CONTROL DEVICE” Technical Field

[0002] The present invention relates to, for example, an air supply device and a fluid control device used for positive airway pressure (PAP: Positive Airway Pressure) ventilation. Background Art

[0003] In the past, fluid control devices such as continuous positive airway pressure (CPAP) devices have been used to treat sleep-related disorders such as obstructive sleep apnea syndrome (OSA). The fluid control device, for example, has a device body with a built-in fan, and supplies gas (such as air) at a pressure greater than atmospheric pressure and at a constant pressure from the device body to a mask worn on the patient's face. Such a fluid control device is driven while the patient is sleeping, so it is required to be quiet. Patent Documents 1 and 2 exemplify fluid control devices that improve quietness.

[0004] Patent Document 1: Japanese Patent Application No. 2008-518640

[0005] Patent Document 2: Japanese Patent Application Publication No. 2016-34411

[0006] However, the quietness of the fluid control device increases as the volume of the silencer cavity increases. On the other hand, the fluid control device becomes larger, so the portability decreases when, for example, a patient carries the fluid control device when traveling. Summary of the invention

[0007] An object of the present invention is to provide an air supply device and a fluid control device that can improve portability when not in use.

[0008] An air supply device for solving the above-mentioned problem comprises: an air blower; and a casing for accommodating the air blower, the casing having a first opening portion for allowing a fluid to flow in when the air blower is driven, and a second opening portion for discharging the fluid when the air blower is driven, and the casing can be extended and retracted to make the internal volume of the casing variable.

[0009] According to this structure, when the blower is driven, the housing is extended, thereby increasing the internal volume of the housing, thereby suppressing the reduction of the quietness of the blower. In addition, when the blower is not driven, for example, when the patient is carrying the blower, the housing is contracted, thereby reducing the internal volume of the housing. As a result, the housing becomes small. Therefore, the portability of the blower when not in use can be improved.

[0010] In one embodiment of the air supply device, the casing has a first portion on which the air blower is disposed and a second portion covering the first portion in one direction, and the casing is extendable and retractable to make the volume of the internal space enclosed by the first portion and the second portion variable.

[0011] According to this structure, when the blower is driven, the volume of the internal space surrounded by the first part and the second part is increased, thereby being able to obtain a silencing effect corresponding to the increase in the volume of the internal space, thereby being able to suppress the reduction in the quietness of the blower. In addition, when the blower is not driven, for example, when the patient carries the blower, the volume of the internal space surrounded by the first part and the second part is reduced, thereby making the housing small. Therefore, the portability of the blower when the blower is not in use can be improved.

[0012] In one aspect of the air supply device, the casing includes a movable portion that allows the first portion and the second portion to move relative to each other.

[0013] According to this configuration, the first portion and the second portion can be relatively moved by the movable portion, thereby making it possible to easily change the volume of the internal space surrounded by the first portion and the second portion.

[0014] In one aspect of the air supply device, the casing includes a partition wall portion that partitions a space in the first portion from a space in the second portion, and the partition wall portion includes a communication portion that connects the space in the first portion with the space in the second portion.

[0015] According to this structure, the space surrounded by the first portion and the partition wall and the space surrounded by the second portion and the partition wall are divided by the partition wall. Thus, the space surrounded by the second portion and the partition wall becomes a space dedicated to the muffler, so the silencing effect can be improved.

[0016] In one embodiment of the air supply device, the second portion has the first opening or the second opening, and an opening surface of the connecting portion on the second portion side faces an opening surface of the first opening or the second opening of the second portion.

[0017] According to this structure, compared with a structure in which the opening surface of the first opening and the opening surface of the communicating portion on the second portion side are not opposed to each other, the behavior of the sound waves and their reflected waves in the second space can be easily predicted, and therefore the characteristics of the muffler in the second space can be easily formulated.

[0018] In one embodiment of the air supply device, there is further provided an intake passage connecting the first opening portion with the intake port of the air blower, the partition portion includes a first partition portion and a second partition portion, the first partition portion is arranged between the first portion and the second partition portion, the second partition portion is arranged between the first partition portion and the second portion, the first portion includes the second opening portion, and the intake passage is formed between the first partition portion and the second partition portion, or between the second partition portion and the second portion.

[0019] According to this structure, when the suction path is formed between the first bulkhead portion and the second bulkhead portion, the space surrounded by the second bulkhead portion and the second part is formed outside the first part and becomes a space dedicated to the muffler. Thus, the silencing effect can be improved. In addition, when the suction path is formed between the second bulkhead portion and the second part, the space surrounded by the first bulkhead portion and the second bulkhead portion is formed outside the first part and becomes a space dedicated to the muffler. Thus, the silencing effect can be improved.

[0020] In one embodiment of the air supply device, there is further provided an exhaust path connecting the second opening portion with the exhaust port of the air blower, the partition portion includes a first partition portion and a second partition portion, the first partition portion is arranged between the first portion and the second partition portion, the second partition portion is arranged between the first partition portion and the second portion, the first portion includes the first opening portion, and the exhaust path is formed between the first partition portion and the second partition portion, or between the second partition portion and the second portion.

[0021] According to this structure, when the discharge path is formed between the first partition wall portion and the second partition wall portion, the space surrounded by the second partition wall portion and the second part is formed outside the first part and becomes a space dedicated to the muffler. Thus, the silencing effect can be improved. In addition, when the discharge path is formed between the second partition wall portion and the second part, the space surrounded by the first partition wall portion and the second partition wall portion is formed outside the first part and becomes a space dedicated to the muffler. Thus, the silencing effect can be improved.

[0022] In one aspect of the air supply device, the second partition wall portion is attached to the first portion so as to be movable relative to the first portion.

[0023] According to this structure, the volume of the intake path or the exhaust path can be made variable, so when the blower is not driven, for example when the patient carries the air supply device, the volume of the intake path or the exhaust path is reduced, thereby making the casing smaller, thereby improving the portability of the air supply device.

[0024] In one embodiment of the air supply device, the second portion is movably mounted on the second partition portion relative to the second partition portion, and a moving direction of the second partition portion relative to the first portion is the same as a moving direction of the second portion relative to the second partition portion.

[0025] According to this structure, the patient moves the second partition wall and the second part in a predetermined direction, thereby forming a space surrounded by the first partition wall and the second partition wall, and a space surrounded by the second partition wall and the second part. Therefore, the patient's operation for forming the space surrounded by the first partition wall and the second partition wall, and the space surrounded by the second partition wall and the second part, that is, the space dedicated to the suction path or the discharge path and the muffler becomes easy.

[0026] In one aspect of the air supply device, the second portion includes a partition portion that partitions an internal space formed by the second partition wall portion and the second portion.

[0027] According to this structure, the space (the space surrounded by the second partition wall and the second part, or the space surrounded by the first partition wall and the second part) connected to the suction path or the discharge path via the connecting part extends from the connecting part in only one direction through the partition. Therefore, in the case where the suction path or the discharge path is formed between the first partition wall and the second partition wall, the sound waves that enter from the connecting part and propagate and reflect in the space surrounded by the second partition wall and the second part and return to the connecting part effectively cancel out the sound waves of a specific frequency in the suction path or the discharge path. In addition, in the case where the suction path or the discharge path is formed between the second partition wall and the second part, the sound waves that enter from the connecting part and propagate and reflect in the space surrounded by the first partition wall and the second partition wall and return to the connecting part effectively cancel out the sound waves of a specific frequency in the suction path or the discharge path.

[0028] In one embodiment of the air supply device, the movable portion connects the first portion and the second portion to seal internal spaces of the first portion and the second portion, and is extendable and retractable in a relative movement direction of the first portion and the second portion.

[0029] According to this structure, it is possible to suppress air from leaking to the outside of the casing from between the first portion and the second portion. Therefore, it is possible to suppress a decrease in the flow rate characteristics of the air supply device.

[0030] In one mode of the above-mentioned air supply device, the above-mentioned movable part is capable of relatively moving the above-mentioned first part and the above-mentioned second part between a first mode in which one of the above-mentioned first part and the above-mentioned second part is accommodated in the other of the above-mentioned first part and the above-mentioned second part and a second mode in which the accommodated one of the above-mentioned first part and the above-mentioned second part protrudes from the other of the above-mentioned first part and the above-mentioned second part.

[0031] According to this structure, in the first method of reducing the volume of the internal space between the first part and the second part, one of the first part and the second part is accommodated in the other of the first part and the second part, so that the housing of the first method can be miniaturized compared to the structure in which one of the first part and the second part is not accommodated in the other of the first part and the second part.

[0032] In one aspect of the air supply device, the casing further includes a muffler detachably mounted to the first opening or the second opening, and the muffler is extendable and retractable so that a volume inside the muffler is variable.

[0033] According to this structure, when the blower is not driven, for example, when the patient is carrying the blower, the silencer is retracted, thereby reducing the volume of the housing, so that the housing becomes small. Therefore, the portability of the blower when not in use can be improved.

[0034] In one aspect of the air blowing device, a rotation speed of the air blower can be set to a plurality of levels, and the casing can change a volume inside the casing to a plurality of levels.

[0035] According to this configuration, the volume inside the casing is changed, so that the frequency at which the penetration loss due to the rotation speed of the blower becomes 0 can be avoided. Therefore, it is possible to suppress a decrease in the quietness of the blower during use.

[0036] A fluid control device for solving the above-mentioned problem includes the above-mentioned air supply device and a tube that connects the second opening of the above-mentioned air supply device to a mask or a nasal cannula and supplies gas from the second opening to the mask or the nasal cannula.

[0037] According to this configuration, similar to the above-described air supply device, it is possible to suppress a decrease in quietness when the fluid control device is in use, and improve the portability of the fluid control device when not in use.

[0038] According to the air supply device and the fluid control device of the present invention, portability when not in use can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a perspective view of the case where the air supply device of the first embodiment of the fluid control device is in the first form.

[0040] Figure 2 This is a perspective view of the case where the air supply device of the first embodiment of the fluid control device is in the second embodiment.

[0041] Figure 3 (a) is a side sectional view of the air supply device when the air supply device is in the first embodiment. Figure 3 (b) is a top sectional view of the air supply device, Figure 3 (c) is Figure 3 A partial enlarged view of (a). Figure 3 (d) is Figure 3 A partial enlarged view of (a).

[0042] Figure 4 It is a side cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0043] Figure 5 It is a side cross-sectional view of the case where the air supply device of the second embodiment of the fluid control device is the first embodiment.

[0044] Figure 6 It is a side cross-sectional view of the case where the air supply device of the second embodiment of the fluid control device is in the second form.

[0045] Figure 7 This is a perspective view of a case where the air supply device according to the third embodiment of the fluid control device is in the first embodiment.

[0046] Figure 8 This is a perspective view of a case where the air supply device according to the third embodiment of the fluid control device is in the second embodiment.

[0047] Fig. 9 It is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment.

[0048] Fig.10 It is a top cross-sectional view of the air supply device in the case where the air supply device is in the second embodiment.

[0049] Fig.11 This is a fourth embodiment of the fluid control device. Fig.11 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig.11 (b) is an enlarged view of the partition and its surroundings.

[0050] Fig.12 (a) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment. Fig.12 (b) is an enlarged view of the partition and its surroundings.

[0051] Fig.13It is an exploded perspective view of the air supply device and the silencer according to the fifth embodiment of the fluid control device.

[0052] Fig.14 (a) is a top view of the air supply device when the air supply device is in the first embodiment. Fig.14 (b) is a top view of the air supply device when the air supply device is in the second embodiment.

[0053] Fig.15 A fluid control device according to a modified example, Fig.15 (a) is a perspective view of the air supply device when the air supply device is in the first embodiment. Fig.15 (b) is a perspective view of the air supply device when the air supply device is in the second embodiment.

[0054] Fig.16 A fluid control device according to a modified example, Fig.16 (a) is a perspective view of the air supply device when the air supply device is in the first embodiment. Fig.15 (b) is a perspective view of the air supply device when the air supply device is in the second embodiment.

[0055] Fig.17 A fluid control device according to a modified example, Fig.17 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig.17 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0056] Fig.18 A fluid control device according to a modified example, Fig.18 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig.18 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0057] Fig.19 A fluid control device according to a modified example, Fig.19 (a) is a perspective view of the air supply device when the air supply device is in the first embodiment. Fig.19 (b) is a perspective view of the air supply device when the air supply device is in the second embodiment.

[0058] Fig. 20 yes Fig.19 Fluid control devices, Fig. 20 (a) is a side sectional view of the air supply device when the air supply device is in the second embodiment. Fig. 20 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0059] Fig.21A fluid control device according to a modified example, Fig.21 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig. 20 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0060] Fig. 22 A fluid control device according to a modified example, Fig. 22 (a) is a side sectional view of the air supply device when the air supply device is in the first embodiment. Fig. 22 (b) is a side cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0061] Fig.23 It is a fluid control device of a modified example and is a plan view of a first portion of an air supply device.

[0062] Fig.24 yes Fig.23 Fluid control devices, Fig.24 (a) is a side sectional view of the air supply device when the air supply device is in the first embodiment. Fig.24 (b) is a side cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0063] Fig.25 A fluid control device according to a modified example, Fig.25 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig.25 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment.

[0064] Fig.26 A fluid control device according to a modified example, Fig.26 (a) is a top cross-sectional view of the air supply device when the air supply device is in the first embodiment. Fig.26 (b) is a top cross-sectional view of the air supply device when the air supply device is in the second embodiment. DETAILED DESCRIPTION

[0065] Embodiments of an air supply device and a fluid control device including the air supply device will be described with reference to the drawings.

[0066] In addition, the drawings may enlarge the components to facilitate understanding. The dimensional ratio of the components may be different from the actual dimensional ratio or the dimensional ratio in other drawings. In addition, in the cross-sectional view, the hatching of the local components may be omitted to facilitate understanding.

[0067] (First embodiment)

[0068] like Figure 1 and Figure 2 As shown, the fluid control device 1 is used as a positive airway pressure (PAP) device, for example. The fluid control device 1 includes a device body 10, a tube 11, and a mask 12. The device body 10 includes an air supply device 10A that supplies fluid (for example, air) to the tube 11, and a control device 10B that controls the air supply device 10A. Figure 1 This is a mode (hereinafter referred to as “first mode”) of the air blowing device 10A when not in use, for example, when carrying it when going out. Figure 2 This is the mode of the air supply device 10A when in use (hereinafter referred to as the "second mode"). Figure 1 and Figure 2 As is clear, the air supply device 10A of the first embodiment is larger than the air supply device 10A of the second embodiment. Figure 2 As shown, the air supply device 10A is connected to the mask 12 via the tube 11. The mask 12 is worn on the face of the patient P. The fluid control device 1 supplies a desired positive pressure fluid (e.g., air) to the nose of the patient P via the tube 11 and the mask 12 through the air supply device 10A, thereby expanding the soft tissue around the tongue root of the patient P, thereby suppressing airway narrowing during breathing.

[0069] The fluid control device 1 determines the state of the patient P (for example, when exhaling), and controls the pressure of the gas supplied to the patient P according to the state of the patient P. The fluid control device 1 estimates the exhalation time of the patient P wearing the mask 12. Then, the pressure value of the supplied gas is controlled according to the estimated exhalation time. For example, the fluid control device 1 supplies gas at a reference pressure value. The reference pressure value is, for example, a pressure value during inhalation specified by a doctor, such as 1000 [Pa]. Then, the fluid control device 1 changes the pressure of the supplied gas to the pressure value during exhalation within the estimated exhalation time. The pressure value during exhalation is, for example, 700 [Pa]. In other words, the fluid control device 1 controls the pressure of the supplied gas alternately to the reference pressure value and the pressure value during exhalation according to the state of the patient P (exhalation, inhalation). When the patient P is in the exhalation state, the pressure of the supplied gas is reduced, thereby reducing the breathing difficulty of the patient P.

[0070] The device body 10 (air supply device 10A) has a housing 20. The housing 20 has a rectangular box shape with the horizontal direction X being the long side direction. The housing 20 has a main body 30. The main body 30 includes a first part 33 constituting the air supply device 10A. The housing 20 has a second part 40 fitted into the first part 33. The first part 33 and the second part 40 can move relative to each other along the height direction Z of the air supply device 10A. The main body 30 (first part 33) and the second part 40 are formed of, for example, a resin material. In addition, the air supply device 10A has a display unit 21 and an operating unit 22 arranged on the upper surface of the main body 30 constituting the control device 10B. An example of the display unit 21 is a liquid crystal panel. An example of the operating unit 22 is a button. The control device 10B displays various information including set values ​​on the display unit 21. In addition, the control device 10B sets various information including set values ​​based on the operation of the operating unit 22.

[0071] like Figure 3 As shown in (a) and (b) of FIG. 1 , the air supply device 10A includes an air blower 50. The control device 10B includes a first control circuit substrate 23 and a second control circuit substrate 24. The first control circuit substrate 23 is connected to the air blower 50 and the second control circuit substrate 24 via electrical connection components such as a wiring harness (not shown). The first control circuit substrate 23 controls the air blower 50 and the display unit 21 based on the operation of the operation unit 22. The display unit 21 and the operation unit 22 are mounted on the second control circuit substrate 24. The air blower 50 is directed to the pipe 11 (see FIG. 1 ). Figure 1 ) supplies a fluid such as air. An example of the blower 50 is a centrifugal fan. In addition, the structure of the blower 50 can be changed arbitrarily. For example, the blower 50 can also be an axial flow fan instead of a centrifugal fan, or a blower instead of a fan.

[0072] like Figure 3 As shown in (a) and (b) of FIG. 3 , the interior of the main body 30 includes an air supply chamber 32A and a control chamber 32B divided by a partition wall 31. The air supply chamber 32A is a space with an upper opening surrounded by the bottom wall 34 of the first part 33, the first side wall 35 and the partition wall 31. The control chamber 32B is a closed space surrounded by the bottom wall 34, the second side wall 36, the partition wall 31 and the upper wall 37 of the control device 10B constituting the main body 30. The air supply chamber 32A is provided with an air blower 50. The control circuit substrates 23 and 24 are disposed in the control chamber 32B. The first side wall 35 stands from the outer peripheral edge of the bottom wall 34 constituting the air supply device 10A and is connected to the partition wall 31. An example of a second opening portion, that is, an exhaust portion 35a, for discharging air sent from the air blower 50 is provided at a portion of the first side wall 35 that is opposite to the partition wall 31 in the horizontal direction X. The exhaust portion 35a has a cylindrical shape protruding from the first side wall 35 in the lateral direction X, and is provided with the pipe 11 (see Figure 1). The second side wall 36 rises from the outer peripheral edge of the bottom wall 34 constituting the control device 10B and is connected to the partition wall 31. The upper wall 37 is opposite to the bottom wall 34 constituting the control device 10B. The display unit 21 and the operation unit 22 are mounted on the upper wall 37. Figure 3 As shown in (a) of FIG. 1 , the partition wall 31 has a recessed portion 31 a opened upward.

[0073] The first control circuit board 23 is mounted on a bottom wall 34 constituting the control device 10B. The second control circuit board 24 is mounted on a lower surface of the upper wall 37 .

[0074] The blower 50 includes a motor 51 as a driving source, an impeller 52 attached to an output shaft 51a of the motor 51, and a housing 53 that accommodates the impeller 52. A suction port 53a of the housing 53 faces the bottom wall 34 with a gap therebetween. A delivery port 53b of the housing 53 is connected to the exhaust portion 35a.

[0075] The second part 40 is fitted into the first part 33 and covers the opening above the air supply chamber 32A. The second part 40 has an upper wall 41 that is opposite to the bottom wall 34 that constitutes the air supply device 10A and a side wall 42 that hangs down from the outer peripheral edge of the upper wall 41. The upper wall 41 is provided with an air intake hole 41a as an example of a first opening. The side wall 42 is provided around the entire periphery of the wall 41. The side wall 42 that covers the partition wall 31 enters the recess 31a.

[0076] like Figure 3 As shown in (a), the partition wall 31 of the first part 33, the first side wall 35 and the side wall 42 of the second part 40 are opposed to each other with a gap therebetween. The partition wall 31, the first side wall 35 and the side wall 42 constitute a movable part 25 for relatively moving the first part 33 and the second part 40 in the height direction Z. The movable part 25 has a sliding structure.

[0077] An elastic member 38 for closing the air supply chamber 32A is provided between the partition wall 31 and the side wall 42 and between the first side wall 35 and the side wall 42. An example of the elastic member 38 is an O-ring. Figure 3 As shown in (c) and (d), the elastic member 38 is accommodated in the mounting recess 31b of the partition wall 31 and the mounting recess 35b of the first side wall 35. The mounting recess 31b and the mounting recess 35b are continuous. The elastic member 38 is compressed by the first part 33 and the second part 40. Grease is applied to the opposing surface of the side wall 42 that faces the partition wall 31 and the first side wall 35.

[0078] Next, refer to Figure 3 and Figure 4 , the method of the air supply device 10A is described.

[0079] By patient P (ref. Figure 1) manually move the first part 33 and the second part 40 relative to each other, so that the air supply device 10A can be changed to Figure 3 The first method shown in (a) and Figure 4 The second method is shown.

[0080] exist Figure 3 In the first mode of the air supply device 10A shown in (a), the second part 40 is close to the bottom wall 34 of the first part 33. More specifically, the bottom wall 34 of the first part 33 and the upper wall 41 of the second part 40 are closest to each other within the relative movement range of the first part 33 and the second part 40 in the height direction Z. In other words, the first mode of the air supply device 10A is a state in which the volume of the air supply chamber 32A, which is a closed space surrounded by the first part 33 and the second part 40, is minimized. Figure 3 As shown in FIG. 2( a ), the partition wall 31 and the first side wall 35 of the first portion 33 are accommodated in a space surrounded by the upper wall 41 and the side wall 42 of the second portion 40 .

[0081] exist Figure 4 In the second mode of the air supply device 10A shown, the second portion 40 is in a state where the bottom wall 34 of the first portion 33 is farther away from the bottom wall 34 of the first portion 33 than in the first mode. More specifically, the bottom wall 34 of the first portion 33 and the upper wall 41 of the second portion 40 are separated the farthest within the relative movement range of the first portion 33 and the second portion 40 in the height direction Z. In other words, in the second mode of the air supply device 10A, the volume of the air supply chamber 32A, which is a closed space surrounded by the first portion 33 and the second portion 40, is the largest. In the second mode of the air supply device 10A, only the upper end portions of the partition wall 31 and the first side wall 35 of the first portion 33 are accommodated in the space surrounded by the upper wall 41 and the side wall 42 of the second portion 40. In other words, in the second mode of the air supply device 10A, the partition wall 31 and the first side wall 35 of the first portion 33 accommodated in the first mode protrude from the second portion 40.

[0082] When the patient P uses the fluid control device 1, Figure 3 The second portion 40 of the air supply device 10A of the first embodiment of (a) is slid upward to change to Figure 4 Then, the patient P wears the mask 12 (refer to Figure 1 ), operate the operating unit 22, thereby driving the blower 50. Figure 4 As shown by the bold arrow, the air outside the air supply device 10A flows into the air supply chamber 32A through the air intake hole 41a. The air flowing into the air supply chamber 32A flows into the housing 53 through the suction port 53a of the housing 53 of the blower 50, and is discharged to the outlet 53b due to the rotation of the impeller 52. The air discharged from the outlet 53b is discharged through the exhaust part 35a and the pipe 11 (see Figure 1 ) is supplied to the mask 12.

[0083] After using the fluid control device 1 , the patient P slides the second portion 40 relative to the first portion 33 to bring the upper wall 41 of the second portion 40 and the bottom wall 34 of the first portion 33 closer, thereby changing the air supply device 10A of the second embodiment to the first embodiment.

[0084] The operation of this embodiment will be described.

[0085] In order to reduce the noise of the air supply device 10A, it is preferred to increase the penetration loss in the air supply device 10A. The degree of increase in penetration loss increases as the volume of the air supply chamber 32A relative to the opening area of ​​the air intake hole 41a increases. Therefore, in order to increase the penetration loss, the first method of reducing the opening area of ​​the air intake hole 41a and the second method of increasing the volume of the air supply chamber 32A can be considered. In the first method, the flow resistance of air when passing through the air intake hole 41a increases, so there is a concern that the delivery flow rate of the air blower 50 will decrease. In order to prevent the delivery flow rate of the air blower 50 from decreasing, it is possible to consider increasing the rotation speed of the air blower 50. However, the noise increases with the increase in the rotation speed of the air blower 50. On the other hand, in the second method, the flow resistance of air when passing through the air intake hole 41a is not large, so there is no need to increase the rotation speed of the air blower 50. Therefore, the increase in the noise of the air blower 50 can be prevented. However, if the volume of the air supply chamber 32A is kept increased, the air supply device 10A will always be larger, and when the patient P carries the air supply device 10A without driving the air supply device 50 , for example, it will be difficult to store the air supply device 50 in a bag or the like.

[0086] Therefore, the air supply device 10A of this embodiment is changed from the first mode to the second mode when the patient P uses the air supply device 10A, and is changed from the second mode to the first mode when the patient P does not use the air supply device 10A. As a result, the volume of the air supply chamber 32A, which is a space surrounded by the first portion 33 and the second portion 40 when the air supply device 10A is used, increases by 1.1% compared to the volume of the air supply chamber 32A in the first mode. Figure 4 The volume of the shaded portion of . That is, the air supply chamber 32A constitutes an expansion type silencer. Therefore, when the air supply fan 50 is driven, the noise of the air supply fan 50 propagates to the expanded air supply chamber 32A, so the penetration loss increases. Therefore, the noise of the air supply device 10A can be reduced. Moreover, compared with the air supply device 10A when the air supply device 10A is used, when the air supply device 10A is not used, the housing 20 becomes small, so when the patient P carries the air supply device 10A, it is easy to accommodate it in a bag or the like.

[0087] As described above, according to this embodiment, the following effects are achieved.

[0088] (1-1) The air supply device 10A is configured such that the housing 20 can be extended and retracted so that the internal volume of the housing 20 is variable. Therefore, when the air blower 50 is driven, the air supply device 10A adopts the second mode, whereby the housing 20 is extended, and the internal volume of the housing 20 is increased, thereby suppressing the reduction in the quietness of the air supply device 10A and the fluid control device 1 when in use. In addition, when the air blower 50 is not driven, for example, when the patient P carries the air supply device 10A, the air supply device 10A adopts the first mode, whereby the housing 20 is shortened, and the internal volume of the housing 20 is reduced. As a result, the housing 20 becomes small, so that the portability of the air supply device 10A and the fluid control device 1 when not in use can be improved.

[0089] (1-2) When the air blower 50 is driven, the housing 20 can obtain a sound-absorbing effect corresponding to the increase in the volume of the internal space by increasing the volume of the internal space surrounded by the first part 33 and the second part 40. Therefore, it is possible to suppress the reduction in the quietness of the air supply device 10A and the fluid control device 1 when in use. In addition, when the air blower 50 is not driven, for example, when the patient P carries the air supply device 10A and the fluid control device 1, the volume of the internal space surrounded by the first part 33 and the second part 40 is reduced, thereby making the housing 20 small. Therefore, it is possible to improve the portability of the air supply device 10A and the fluid control device 1 when not in use.

[0090] (1-3) The casing 20 can easily change the volume of the internal space surrounded by the first portion 33 and the second portion 40 by relatively moving the first portion 33 and the second portion 40 .

[0091] (1-4) In the first embodiment of the air supply device 10A, the partition wall 31 and the first side wall 35 of the first portion 33 are accommodated in the space surrounded by the upper wall 41 and the side wall 42 of the second portion 40. Thus, compared with a structure in which the partition wall 31 and the first side wall 35 of the first portion 33 are not accommodated in the space surrounded by the upper wall 41 and the side wall 42 of the second portion 40, the housing 20 of the first embodiment can be miniaturized.

[0092] (1-5) An elastic member 38 is attached to the first side wall 35 of the first portion 33 to seal the space between the first side wall 35 and the side wall 42 of the second portion 40. Therefore, it is possible to suppress the air in the air supply chamber 32A from leaking to the outside of the housing 20 through the space between the first side wall 35 and the side wall 42. Therefore, it is possible to suppress the reduction in the flow rate characteristics of the air supply device 10A.

[0093] (1-6) The display unit 21 and the operation unit 22 are provided on the upper wall 37 of the first portion 33. That is, the display unit 21 and the operation unit 22 are provided in addition to the second portion 40 and in the portion of the main body 30 exposed from the second portion 40. Therefore, there is no relative movement between the first control circuit substrate 23 and the second control circuit substrate 24. Therefore, compared with a structure in which the display unit 21 and the operation unit 22 are provided on the second portion 40, that is, compared with a structure in which the first control circuit substrate 23 and the second control circuit substrate 24 move relative to each other, the electrical connection structure between the first control circuit substrate 23 and the second control circuit substrate 24 can be simplified, and the reliability of the electrical connection can be improved.

[0094] (Second embodiment)

[0095] Reference Figure 5 and Figure 6 , a second embodiment of the air supply device 10A and the fluid control device 1 is described. Compared with the air supply device 10A and the fluid control device 1 of the first embodiment, the air supply device 10A and the fluid control device 1 of this embodiment are different in that a partition wall 60 is added to the first part 33. In addition, in this embodiment, the same reference numerals are marked on the same components as those in the first embodiment, and the description thereof is appropriately omitted. In addition, the description of the relationship between the same components is also appropriately omitted.

[0096] like Figure 5 As shown, the partition wall portion 60 is provided at the upper end of the partition wall 31 and the first side wall 35, and is opposite to the bottom wall 34 constituting the air supply device 10A. The partition wall portion 60 is formed integrally with the first portion 33 (the partition wall 31 and the first side wall 35). The air supply chamber 32A is composed of the partition wall portion 60, the partition wall 31, the first side wall 35 and the bottom wall 34.

[0097] The bulkhead 60 has a connecting portion 61 that connects the air supply chamber 32A with the space outside the air supply chamber 32A. An example of the connecting portion 61 is a through hole that penetrates the bulkhead 60 along the height direction Z. The opening surface of the connecting portion 61 is opposite to the opening surface of the air intake hole 41a of the second part 40. The opening area of ​​the connecting portion 61 can be set arbitrarily. In one example, the opening area of ​​the connecting portion 61 is equal to the opening area of ​​the air intake hole 41a.

[0098] exist Figure 5 In the first embodiment of the air supply device 10A shown in FIG. 1 , the partition wall portion 60 is close to the upper wall 41 of the second portion 40. Figure 5 In the embodiment, the partition wall portion 60 is in contact with the upper wall 41. In the first embodiment of the air blowing device 10A, a gap may be formed between the partition wall portion 60 and the upper wall 41 in the height direction Z.

[0099] exist Figure 6In the second embodiment of the air supply device 10A shown in the figure, the second portion 40 slides upward relative to the first portion 33, thereby separating the partition wall portion 60 from the upper wall 41 of the second portion 40 in the height direction Z. As a result, a space surrounded by the upper wall 41 of the second portion 40, the side wall 42, and the partition wall portion 60, i.e., the muffler cavity 26, is formed on the housing 20. That is, in the second embodiment of the air supply device 10A, the housing 20 is in a state in which an expansion type muffler is added to the air supply chamber 32A. In the second embodiment of the air supply device 10A, the partition wall portion 60 separates the air supply chamber 32A from the muffler cavity 26.

[0100] When the blower 50 is in a driven state, as shown by Figure 6 As indicated by the thick arrow in FIG. 4 , the air outside the air supply device 10A flows into the muffler cavity 26 through the air intake hole 41a. The air passing through the air intake hole 41a flows into the air supply chamber 32A through the muffler cavity 26 and the connecting portion 61. The air flowing into the air supply chamber 32A is sucked into the suction port 53a of the air blower 50. The air blower 50 flows to the pipe 11 (see FIG. 4 ) through the outlet 53b. Figure 1 )Supply air.

[0101] As described above, according to the present embodiment, in addition to the effects of the first embodiment, the following effects are achieved.

[0102] (2-1) The housing 20 has a partition wall 60 that separates the air supply chamber 32A from the muffler cavity 26. The partition wall 60 has a connecting portion 61 that connects the air supply chamber 32A of the first portion 33 with the internal space of the second portion 40. The air blower 50, the first control circuit board 23, and the second control circuit board 24 (all refer to FIG. 2 ) are not arranged in the muffler cavity 26. Figure 4 ). As a result, the sound waves in the silencer cavity 26 are not reflected by the air blower 50, the first control circuit substrate 23, and the second control circuit substrate 24. Therefore, it is possible to suppress the sound waves in the silencer cavity 26 and their reflected waves caused by the air blower 50 from complicating the movement of the sound waves in the silencer cavity 26. Therefore, it is easy to formulate the characteristics of the silencer in the silencer cavity 26. Therefore, it is easy to design the silencer cavity 26 that is easy to improve the quietness of the air supply device 10A. In addition, an example of the characteristics of the silencer is the relationship between the penetration loss and the frequency. The movement of the sound waves in the silencer cavity 26 is simplified, thereby simplifying the relationship between the penetration loss and the frequency.

[0103] (2-2) The opening surface of the air intake hole 41a of the second portion 40 is opposite to the opening surface of the connecting portion 61 of the partition portion 60 on the second portion 40 side. Therefore, compared with a structure in which the opening surface of the air intake hole 41a and the opening surface of the connecting portion 61 on the second portion 40 side are not opposite, it is easy to predict the reflection of sound in the silencer cavity 26, and thus it is easy to formulate the characteristics of the silencer in the silencer cavity 26.

[0104] (Third embodiment)

[0105] Reference Figure 7 to Figure 10 , a third embodiment of the air supply device 10A and the fluid control device 1 is described. Compared with the air supply device 10A and the fluid control device 1 of the first embodiment, the air supply device 10A and the fluid control device 1 of this embodiment are different in the structure of the casing, especially in the moving direction of the second part relative to the first part. In addition, in this embodiment, the same reference numerals are marked on the same components as those in the first embodiment, and the description thereof is appropriately omitted. In addition, the description of the relationship between the same components is also appropriately omitted.

[0106] like Figure 7 As shown, the housing 20A of the device body 10 (air supply device 10A) includes a first portion 70, a second portion 80, and a partition wall 60. The partition wall 60 includes a first partition wall 75x (see Fig. 9 ) and the second partition wall 90. The second partition wall 90 is mounted on the first portion 70, and the second portion 80 is mounted on the second partition wall 90. Figure 7 The first embodiment of the air supply device 10A shown in FIG. Figure 8 In the case of the second embodiment of the air blowing device 10A shown in the figure, the second partition wall portion 90 moves in the lateral direction X relative to the first portion 70 , and the second portion 80 moves in the lateral direction X relative to the second partition wall portion 90 .

[0107] like Fig. 9 As shown in FIG. 1 , the first part 70 has an air supply chamber 72 and a control chamber 73 divided by a partition wall 71. The air supply chamber 72 and the control chamber 73 are arranged in a longitudinal direction Y that is orthogonal to the lateral direction X and the height direction Z. In this way, the control device 10B is accommodated in the first part 70. The first part 70 has a bottom wall 74 that is rectangular in a plan view, a side wall 75 that rises from the outer peripheral edge of the bottom wall 74, and an upper wall 76 that is opposite to the bottom wall 74 (see FIG. 1 ). Figure 7 ). The partition wall 71 extends between two side walls 75 that are opposite to each other in the transverse direction X. A through hole 71a is provided in the partition wall 71. The first partition wall portion 75x is arranged between the first part 70 and the second partition wall portion 90 in the transverse direction X, and extends in the longitudinal direction Y. The first partition wall portion 75x separates the air supply chamber 72 from the space in the second part 80. An inner air intake hole 75a is provided in the first partition wall portion 75x. An exhaust portion 75b as an example of a second opening portion is provided in the side wall 75 extending in the transverse direction X that constitutes the control chamber 73. The exhaust portion 75b is opposite to the through hole 71a in the longitudinal direction Y. The portion of the delivery side of the housing 53 of the blower 50 arranged in the air supply chamber 72 is inserted into the through hole 71a and the exhaust portion 75b.

[0108] like Figure 7As shown in the figure, the display unit 21 and the operation unit 22 are provided on the upper wall 76. The upper wall 76 covers both the air supply chamber 72 and the control chamber 73 from the upper side. Therefore, the area of ​​the upper wall 76 when viewed from above is larger than the area of ​​the upper wall 37 of the housing 20 in the first embodiment and the second embodiment when viewed from above. Although not shown in the figure, the second control circuit substrate 24 is mounted on the lower surface of the upper wall 76 corresponding to the air supply chamber 72 and the control chamber 73.

[0109] like Fig. 9 As shown, the second partition wall portion 90 is arranged between the first partition wall portion 75x and the second portion 80. The second partition wall portion 90 has a side wall 91 that is opposite to the side wall 75 of the first portion 70 in the horizontal direction X and a peripheral wall 92 that extends from the outer peripheral edge of the side wall 91 toward the first portion 70 along the horizontal direction X. An outer air intake hole 94 is provided in the peripheral wall 92. The opening area of ​​the outer air intake hole 94 can be set arbitrarily. In one example, the opening area of ​​the outer air intake hole 94 is equal to the opening area of ​​the inner air intake hole 75a. A connecting portion 93 is provided in the side wall 91. An example of the connecting portion 93 is a through hole that passes through the side wall 91 in the horizontal direction X. The connecting portion 93 is located in the side wall 91 at a position closer to the outer air intake hole 94 than the position opposite to the inner air intake hole 75a. The opening area of ​​the connecting portion 93 can be set arbitrarily. In one example, the opening area of ​​the communication portion 93 is equal to the opening area of ​​the inner air intake hole 75 a .

[0110] The second partition wall portion 90 covers the right end portion of the first portion 70. The peripheral wall 92 is opposed to the two side walls 75, the bottom wall 74, and the upper wall 76 extending in the lateral direction X with a gap therebetween. The peripheral wall 92 of the second partition wall portion 90, the two side walls 75, the bottom wall 74, and the upper wall 76 extending in the lateral direction X in the first portion 70 constitute the first movable portion 27A that can move relatively in the lateral direction X. An elastic member 38A for sealing between the first portion 70 and the second partition wall portion 90 is provided between the peripheral wall 92 and the two side walls 75, the bottom wall 74, and the upper wall 76 in the longitudinal direction Y. An example of the elastic member 38A is an O-ring. The elastic member 38A is mounted on the first portion 70. Grease is applied to the opposing surface of the peripheral wall 92 that is opposed to the two side walls 75, the bottom wall 74, and the upper wall 76 extending in the lateral direction X.

[0111] The second portion 80 includes a side wall 81 that is opposed to the side wall 91 of the second partition wall portion 90 in the transverse direction X, and a peripheral wall 82 that extends from the outer peripheral edge of the side wall 81 toward the second partition wall portion 90 in the transverse direction X. When viewed from the second partition wall portion 90, the second portion 80 covers the second partition wall portion 90 from the side where the first portion 70 does not exist. Fig. 9In the first mode of the air supply device 10A shown, the peripheral wall 82 covers the outer air intake hole 94. The peripheral wall 82 is opposite to the peripheral wall 92 of the second partition wall 90 with a gap. The peripheral wall 82 of the second part 80 and the peripheral wall 92 of the second partition wall 90 constitute the second movable part 27B that can move relatively in the horizontal direction X. An elastic member 38B for sealing the second partition wall 90 and the second part 80 is provided between the peripheral wall 82 of the second part 80 and the peripheral wall 92 of the second partition wall 90. An example of the elastic member 38B is an O-ring. The elastic member 38A is mounted on the second partition wall 90. Grease is applied to the opposing surface of the peripheral wall 82 of the second part 80 that is opposite to the peripheral wall 92 of the second partition wall 90. In addition, the first movable part 27A and the second movable part 27B constitute a movable part for making the first part 70 and the second part 80 move relatively.

[0112] exist Fig. 9 In the first embodiment of the air supply device 10A shown in the figure, the second partition wall portion 90 is accommodated in the space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80, and the right side portion of the first portion 70 is accommodated in the space surrounded by the side wall 91 and the peripheral wall 92 of the second partition wall portion 90. In more detail, the right side portion of the first portion 70 and the second partition wall portion 90 are accommodated in the space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80. In addition, the outer air intake hole 94 is opposite to the side wall 75 and the peripheral wall 92. Therefore, the outer air intake hole 94 is not exposed to the outside of the housing 20A and is not connected to the air supply chamber 72.

[0113] In from Fig. 9 The first embodiment of the air supply device 10A shown in FIG. Fig.10 In the second embodiment of the air supply device 10A shown in FIG. Figure 1 ) causes the second portion 80 to slide in the lateral direction X. Along with this, the second partition wall portion 90 slides in the lateral direction X. As a result, the second portion 80 and the second partition wall portion 90 are separated from the first portion 70 in the lateral direction X, and the second portion 80 is separated from the second partition wall portion 90 in the lateral direction X. In other words, the right side portion of the first portion 70 that is accommodated in the first embodiment of the air supply device 10A protrudes from the second partition wall portion 90, and the second partition wall portion 90 that is accommodated in the first embodiment protrudes from the second portion 80.

[0114] like Fig.10As shown, in the second mode of the air supply device 10A, an intake passage 28 is formed between the first partition wall portion 75x and the second partition wall portion 90. That is, the intake passage 28 is formed outside the first portion 70. In addition, in the second mode of the air supply device 10A, the outer air intake hole 94 is located at a position closer to the outside of the horizontal direction X than the first portion 33, and the peripheral wall 82 of the second portion 80 is located at a position closer to the outside of the horizontal direction X than the outer air intake hole 94. Therefore, the outer air intake hole 94 is exposed to the outside of the casing 20A and is connected to the intake passage 28. The intake passage 28 is connected to the air supply chamber 72 via the inner air intake hole 75a, and more specifically, is connected to the intake port 53a of the air blower 50. Therefore, the intake passage 28 connects the outer air intake hole 94 with the intake port 53a.

[0115] A muffler cavity 29 is formed between the second portion 80 and the second partition portion 90 as a space surrounded by the side wall 91 of the second partition portion 90 and the second portion 80. The muffler cavity 29 is connected to the suction path 28 via the connecting portion 93. The muffler cavity 29 is parallel to the suction path 28 and extends along the longitudinal direction Y. That is, the casing 20A has a branch-type muffler in the second mode of the air supply device 10A. The muffler cavity 29 includes a first cavity portion 29a extending from the connecting portion 93 to the outer air intake hole 94 side in the long side direction of the muffler cavity 29 and a second cavity portion 29b extending from the connecting portion 93 to the inner air intake hole 75a side. In the long side direction of the muffler cavity 29, the length L1 of the first cavity portion 29a and the length L2 of the second cavity portion 29b are different from each other. As Fig.10 As shown, the length L1 of the first cavity portion 29a is greater than the length L2 of the second cavity portion 29b. The air supply device 10A of this embodiment sets the passage cross-sectional area of ​​the muffler cavity 29 and the length L1 of the first cavity portion 29a and the length L2 of the second cavity portion 29b, so as to effectively reduce the sound waves of two specific frequencies in the frequency above 1000kHz and below 5000kHz in the noise of the air supply device 10A in the second mode. In addition, the length L1 of the first cavity portion 29a and the length L2 of the second cavity portion 29b can be arbitrarily changed according to the noise of the frequency to be reduced. For example, the length L1 of the first cavity portion 29a can also be less than the length L2 of the second cavity portion 29b.

[0116] The operation of this embodiment will be described.

[0117] When the air supply device 10A drives the air blower 50 in the second mode, the rotation noise (prevailing sound) of the impeller 52 is generated. The frequency of the prevailing sound is calculated based on the product of the rotation speed of the impeller 52 and the number of blades of the impeller 52. The prevailing sound propagates to the outside of the casing 20 via the air supply chamber 32A, the suction path 28, and the outer air intake hole 94. Here, the prevailing sound propagated from the air supply chamber 32A to the suction path 28 propagates to the muffler cavity 29 via the passage 28a between the inner air intake hole 75a of the suction path 28 and the connecting portion 93 via the connecting portion 93. Here, the passage cross-sectional area of ​​the passage 28a is constant, so the sound wave of the prevailing sound propagated in the passage 28a gradually changes to a plane wave. The prevailing sound that becomes a plane wave branches and propagates to the first cavity portion 29a and the second cavity portion 29b of the muffler cavity 29 via the connecting portion 93. The prevailing sound propagating to the first cavity portion 29a is reflected by the peripheral wall 82 of the second portion 80 which becomes the end wall of the first cavity portion 29a and returns to the connecting portion 93. The prevailing sound propagating to the second cavity portion 29b is reflected by the peripheral wall 82 of the second portion 80 which becomes the end wall of the second cavity portion 29b and returns to the connecting portion 93. The prevailing sound returning from the connecting portion 93 to the suction path 28 overlaps with the prevailing sound of the suction path 28 and cancels each other out.

[0118] Here, the length L1 of the first cavity portion 29a is set to be a phase that cancels out the prevailing sound of the first rotation speed of the motor 51 (impeller 52) of the blower 50, that is, a phase opposite to the phase of the prevailing sound of the suction path 28. The length L2 of the second cavity portion 29b is set to be a phase that cancels out the prevailing sound at the second rotation speed that is different from the first rotation speed of the motor 51 (impeller 52). Therefore, it is possible to reduce the prevailing sound when the blower 50 is driven at the first rotation speed or the second rotation speed. In addition, the frequency of the prevailing sound at the first rotation speed and the second rotation speed is greater than 1000kHz and less than 5000kHz.

[0119] As described above, according to this embodiment, the following effects are achieved.

[0120] (3-1) A suction passage 28 is formed between the first partition wall portion 75x and the second partition wall portion 90, and a muffler cavity 29 is formed between the second partition wall portion 90 and the second portion 80. Therefore, the muffler cavity 29 is formed outside the air supply chamber 72, so that the muffler cavity 29 becomes a space dedicated to the muffler. Therefore, the muffler cavity 29 improves the silencing effect, and the reduction in the quietness of the air supply device 10A and the fluid control device 1 can be suppressed.

[0121] (3-2) The passage sectional area of ​​the passage 28a of the suction passage 28 becomes constant. Therefore, the sound wave of the prevailing sound propagating in the passage 28a becomes a plane wave. As a result, the prevailing sound propagating in the suction passage 28 is easily cancelled out by the first cavity portion 29a and the second cavity portion 29b of the muffler cavity 29.

[0122] (3-3) In the first embodiment of the air blowing device 10A, the peripheral wall 82 of the second portion 80 covers the outer air intake hole 94 of the second partition wall 90. Therefore, foreign matter such as dust is unlikely to enter between the first portion 70 and the second partition wall 90 and the air blowing chamber 72 through the outer air intake hole 94.

[0123] (3-4) The second partition wall portion 90 is relatively movably mounted on the first portion 70. As a result, the volume of the suction path 28 can be made variable, so when the blower 50 is not driven, for example, when the patient P carries the blower device 10A and the fluid control device 1, the volume of the suction path 28 can be reduced. Therefore, the housing 20A becomes small, so that the portability of the blower device 10A and the fluid control device 1 when not in use can be improved.

[0124] (3-5) The direction in which the second partition wall portion 90 moves relative to the first portion 70 and the direction in which the second portion 80 moves relative to the second partition wall portion 90 are the same direction, so the patient P moves the second partition wall portion 90 and the second portion 80 in a predetermined direction to form the suction path 28 and the muffler cavity 29. Therefore, the operation of the patient P for forming the suction path 28 and the muffler cavity 29 becomes easy.

[0125] (3-6) The side wall 75 of the first part 70 and the peripheral wall 92 of the second partition wall 90 are sealed by the elastic member 38A. Therefore, it is possible to suppress air leakage from the air supply chamber 72 and the suction path 28 to the outside of the casing 20. In addition, the peripheral wall 92 of the second partition wall 90 and the peripheral wall 82 of the second part 80 are sealed by the elastic member 38B. Therefore, it is possible to suppress air leakage from the muffler cavity 29 to the outside of the casing 20A. Therefore, it is possible to suppress the reduction of the flow rate characteristics of the air supply device 10A.

[0126] (3-7) In the first embodiment of the air supply device 10A, the second partition wall portion 90 and the right side portion of the first portion 70 are accommodated in the space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80. Therefore, compared with a structure in which the second partition wall portion 90 and the right side portion of the first portion 70 are not accommodated in the space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80, the housing 20A of the first embodiment can be miniaturized.

[0127] (Fourth embodiment)

[0128] Reference Fig.11 and Fig.12, a fourth embodiment of the air supply device 10A and the fluid control device 1 is described. Compared with the air supply device 10A and the fluid control device 1 of the third embodiment, the air supply device 10A and the fluid control device 1 of this embodiment are different in that a partition 100 is added to the second portion 80. In addition, in this embodiment, the same reference numerals are marked on the same components as those in the third embodiment, and their descriptions are appropriately omitted. In addition, the relationship between the same components is also appropriately omitted.

[0129] like Fig.12 As shown in (a), the partition 100 divides the silencer cavity 29 of the second mode of the air supply device 10A into a space on the side of the outer air intake hole 94 in the longitudinal direction Y, that is, a first cavity 29a and a space on the side of the inner air intake hole 75a, that is, a second cavity 29b. Fig.12 As shown in (b), the partition 100 has a partition plate 101 that can rotate and an elastic body 102 that applies force to the partition plate 101 in the rotation direction. The rotation axis 101a of the partition plate 101 is installed in the recess 81a of the second part 80. A limiting portion 81b that limits the rotation of the partition plate 101 is provided in the recess 81a. An example of the limiting portion 81b is a protrusion that protrudes from the recess 81a to the rotation path of the partition plate 101. An example of the elastic body 102 is a coil spring. One end of the elastic body 102 is installed on the partition plate 101, and the other end of the elastic body 102 is installed on the side wall 81 of the second part 80.

[0130] exist Fig.11 In the first mode of the air supply device 10A shown in (a) and (b), the partition 100 is pressed toward the side wall 81 of the second portion 80 by the side wall 91 of the second partition 90, so that the partition plate 101 strongly compresses the elastic body 102. Fig.12 In the second mode of the air supply device 10A shown in (a) and (b), the partition 100 leaves the side wall 91 of the second partition wall portion 90 along with the side wall 81 of the second portion 80, and the partition plate 101 is rotated by the force of the elastic body 102. Moreover, the partition plate 101 is restricted from rotating by the limiting portion 81b. The air supply device 10A of this embodiment sets the passage cross-sectional area and length L1 of the first cavity portion 29a of the muffler cavity 29 so as to effectively reduce a sound wave of a specific frequency above 1000kHz and below 5000kHz in the noise of the air supply device 10A in the second mode. In addition, in the second mode of the air supply device 10A, a gap may also be formed between the partition plate 101 and the side wall 91 of the second partition wall portion 90.

[0131] The operation of this embodiment will be described.

[0132] When the blower 50 is driven in the second mode of the air supply device 10A, when the prevailing sound generated by the blower 50 propagates to the muffler cavity 29 via the connecting portion 93, it is difficult to propagate to the second cavity portion 29b of the muffler cavity 29 through the partition plate 101. Therefore, the prevailing sound propagates to the first cavity portion 29a, is reflected by the peripheral wall 82 of the second portion 80 that becomes the end wall of the first cavity portion 29a, and returns to the suction path 28 via the connecting portion 93. The prevailing sound returning to the suction path 28 cancels out the prevailing sound of the suction path 28.

[0133] As described above, according to the present embodiment, in addition to the effects of the third embodiment, the following effects are achieved.

[0134] (4-1) The prevailing sound of the blower 50 at the first rotation speed is cancelled out by the partition 100 and the first cavity portion 29a of the silencer cavity 29. Therefore, only the prevailing sound of a specific frequency serving as a target can be reduced.

[0135] (Fifth embodiment)

[0136] Reference Fig.13 and Fig.14 , a fifth embodiment of the air supply device 10A and the fluid control device 1 is described. Compared with the air supply device 10A and the fluid control device 1 of the first embodiment, the air supply device 10A and the fluid control device 1 of this embodiment are different in the structure of the casing and the addition of a silencer outside the casing. In addition, in this embodiment, the same reference numerals are marked on the same components as those in the first embodiment, and their descriptions are appropriately omitted. In addition, the descriptions of the relationships between the same components are also appropriately omitted.

[0137] like Fig.13 As shown, the air supply device 10A has a housing 20B. The housing 20B has a main body 30A and a muffler 110. The muffler 110 is installed to be detachable relative to the main body 30A. In one example, Fig.13 As shown, the muffler 110 is mounted on the exhaust portion 35a of the main body 30A. An external thread 35c for mounting the muffler 110 is provided on the outer periphery of the exhaust portion 35a of the main body 30A. In addition, the muffler 110 may be mounted on the air intake hole 39x instead of the exhaust portion 35a. In this case, the air intake hole 39x has the same structure as the exhaust portion 35a.

[0138] The main body 30A has an upper wall 39A and a side wall 39B. The side wall 39B is provided with an air intake hole 39x as an example of a first opening and an exhaust portion 35a as an example of a second opening. The main body 30A has an internal space enclosed by the upper wall 39A, the side wall 39B and the bottom wall (not shown). As in the main body 30 of the first embodiment, the internal space is divided into a blower chamber 32A and a control chamber 32B by a partition wall 31 (see Figure 3 (b)). In addition, similarly to the first portion 33 of the first embodiment, a blower 50 is disposed in the blower chamber 32A, and a first control circuit board 23 is disposed in the control chamber 32B (see Figure 3 (b)). The second control circuit board 24 (see Figure 3 (a)) is mounted on the lower surface of the upper wall 39A. Fig.13 As shown, the display unit 21 and the operation unit 22 are provided on the upper wall 39A. In addition, like the air supply chamber 72 and the control chamber 73 of the third embodiment, the air supply chamber 32A and the control chamber 32B of the main body 30A of this embodiment are arranged in the longitudinal direction Y. As in the third embodiment, the housing 53 of the air blower 50 is inserted into the through hole (not shown) provided in the partition wall 31 and installed in the exhaust portion 35a.

[0139] The silencer 110 is formed in a substantially cylindrical shape having a cavity penetrating in the longitudinal direction. The silencer 110 includes a first connection portion 112 having an internal thread 111 mounted on the external thread 35c of the main body 30A, and a first connection portion 112 connected to the pipe 11 (see Figure 1 ) and a second connecting portion 113, and a movable portion 114 connecting the first connecting portion 112 and the second connecting portion 113. The movable portion 114 can close the first connecting portion 112 and the second connecting portion 113 and connect them so as to be retractable. Therefore, the movable portion 114 connects the first connecting portion 112 and the second connecting portion 113 so as to be able to approach and separate in the long side direction of the muffler 110. An example of the shape of the movable portion 114 is a corrugated shape.

[0140] The air supply device 10A can be changed to Fig.14 The first method shown in (a) and Fig.14 The second method shown in (b) is as follows. Fig.14 As shown in (a), in the first mode of the air supply device 10A, the movable portion 114 of the muffler 110 is in a contracted state, that is, the volume of the internal space of the muffler 110 is reduced. Fig.14 As shown in (b) of FIG. 1 , in the second aspect of the air blowing device 10A, the movable portion 114 of the muffler 110 is in a state of being extended, that is, the volume of the internal space of the muffler 110 is increased.

[0141] As described above, according to this embodiment, the following effects are achieved.

[0142] (5-1) When the air blower 50 is driven, the movable portion 114 of the silencer 110 is extended, thereby increasing the volume of the internal space of the silencer 110 and forming a cavity inside the silencer 110. The cavity has the function of a silencer, and thus can suppress the reduction in the quietness when the air supply device 10A and the fluid control device 1 are used. In addition, when the air blower 50 is not driven, for example, when the patient P carries the air supply device 10A and the fluid control device 1, the patient P removes the silencer 110 from the main body 30A and contracts the movable portion 114 of the silencer 110, thereby reducing the volume of the silencer 110. As a result, the housing 20B becomes small, and thus the portability of the air supply device 10A and the fluid control device 1 when not in use can be improved.

[0143] (Variation Example)

[0144] The descriptions related to the above-mentioned embodiments are examples of the possible modes of the air supply device and fluid control device of the present invention, and do not intentionally limit the modes. The air supply device and fluid control device of the present invention can be, for example, a combination of the modified examples of the above-mentioned embodiments shown below and at least two non-contradictory modified examples.

[0145] In the first embodiment and the second embodiment, the structure of the movable portion 25 can be arbitrarily changed. For example, the structure of the movable portion 25 can be changed as shown in the following (A1) and (A2).

[0146] (A1) Fig.15 As shown in (a), the movable portion 120 is a bellows structure that can connect the first portion 33 and the second portion 40 in the height direction Z and can be extended and retracted in the height direction Z. Fig.15 In the first embodiment of the air supply device 10A shown in (a), the movable portion 120 is compressed and contracted. As a result, the first portion 33 and the second portion 40 are brought into close proximity. Fig.15 In the second embodiment of the air supply device 10A shown in (b), the movable portion 120 is stretched and extended. As a result, the first portion 33 and the second portion 40 are separated. In the second embodiment of the air supply device 10A, the volume inside the casing 20 is increased by the amount of extension of the movable portion 120 compared to the movable portion 120 in the first embodiment. On the other hand, in the first embodiment of the air supply device 10A, the size of the outer contour of the casing 20 is reduced by the amount of contraction of the movable portion 120 compared to the movable portion 120 in the second embodiment. As a result, the same effect as the effect of (1-1) of the first embodiment is achieved.

[0147] (A2) Fig.16As shown in (a), the movable part 130 can connect the first part 33 and the second part 40 in the height direction Z and can be extended and retracted in the height direction Z. The movable part 130 includes a bendable soft part 131 and a plurality of guide mechanisms 132 (in Fig.16 The guide mechanism 132 is mounted on the first side wall 35 of the first part 33 and the side wall 42 of the second part 40. An example of the guide mechanism 132 has eight pillars 133 connected to each other, forming a Fig.16 The two rhombuses shown in (b) of FIG. Each support 133 is rotatably connected to other support 133 at both ends. Fig.16 In the first embodiment of the air supply device 10A shown in (a), the first portion 33 and the second portion 40 are close to each other, so that each rhombus of the guide mechanism 132 is deformed. Fig.16 In the second embodiment of the air supply device 10A shown in (b), the first portion 33 and the second portion 40 are separated from each other, so that the guide mechanism 132 forms two rhombuses. The guide mechanism 132 is maintained by the friction force of the rotating portion of each support 133, for example. Fig.16 The posture of each support 133 shown in (a) and Fig.16 The posture of each support 133 is shown in (b).

[0148] In the third embodiment, the positional relationship between the inner air intake hole 75a and the connecting portion 93 can be changed arbitrarily. In one example, the opening surface of the inner air intake hole 75a and the opening surface of the connecting portion 93 may be opposite to each other. In this case, Fig.17 As shown in (b), in the second mode, the air supply device 10A preferably has an extended passage 140 for forming a plane wave from the prevailing sound propagating from the air supply chamber 72 to the connecting portion 93. The extended passage 140 extends from the inner air intake hole 75a of the suction path 28 toward the air supply chamber 72 side. The passage cross-sectional area of ​​the extended passage 140 can be set arbitrarily. In one example, the passage cross-sectional area of ​​the extended passage 140 is equal to the passage cross-sectional area of ​​the suction path 28. The extended passage 140 is connected to the muffler cavity 29. That is, the connecting portion 93 of the second partition wall portion 90 is arranged at a position opposite to the inner air intake hole 75a in the horizontal direction X.

[0149] like Fig.17 (a) and Fig.17 As shown in (b), the extended passage 140 is composed of a first wall 141 extending from the side wall 91 of the second partition portion 90 in the horizontal direction X, a second wall 142 extending from the side wall 75 of the first portion 70 in the horizontal direction X to the air supply chamber 72, a bottom wall 74 of the first portion 70, and an upper wall 76 (see Figure 8The extended passage 140 is composed of a first wall 141 , a second wall 142 , the bottom wall 74 of the first portion 70 , the upper wall 76 , and the peripheral wall 92 of the second partition wall portion 90 .

[0150] According to this structure, the prevailing sound propagating in the extension passage 140 becomes a plane wave. Therefore, the prevailing sound in the suction passage 28 is easily cancelled out by the first cavity portion 29 a and the second cavity portion 29 b of the muffler cavity 29 .

[0151] In the fourth embodiment, the structure of the partition 100 can be changed arbitrarily. Fig.18 As shown in (a) and (b), as the partition, a corrugated expansion wall 83 connected to the side wall 91 of the second partition wall portion 90 and the side wall 81 of the second portion 80 and capable of expansion and contraction in the lateral direction X may also be used. Fig.18 In the first embodiment of the air supply device 10A shown in (a), the second partition wall portion 90 and the second portion 80 are brought closer to each other, whereby the telescopic wall 83 is contracted. Fig.18 In the second aspect of the air blowing device 10A shown in (b), the second partition wall portion 90 and the second portion 80 are separated from each other, whereby the telescopic wall 83 is extended.

[0152] In the first to fourth embodiments, a muffler may be provided on the exhaust side of the blower 50. For example, the structure of the muffler on the exhaust side of the blower 50 includes the following (B1) and (B2).

[0153] (B1) Fig.19 As shown in (a) and (b), the first side wall 35 of the first portion 33 may be provided with an air intake hole 35d as an example of the first opening, and the upper wall 41 of the second portion 40 may be provided with an air exhaust hole 41b as an example of the second opening. Fig.19 In the first embodiment of the air supply device 10A shown in (a), the side wall 42 of the second portion 40 covers the air intake hole 35d of the first portion 33. Fig.19 In the second embodiment of the air supply device 10A shown in (b), the side wall 42 is moved above the air intake hole 35d, so that the air intake hole 35d is exposed to the outside of the housing 20. Fig. 20 As shown in (b), the outlet 53b of the blower 50 is located inside the first side wall 35. Fig. 20 As shown in (a) of FIG. 1 , in the second embodiment of the air blowing device 10A, an expansion type muffler is configured in which the volume of the air blowing chamber 32A communicating with the exhaust hole 41 b is increased compared to the first embodiment.

[0154] (B2) Fig.21As shown in (b), a discharge passage 150 may be formed between the first partition wall portion 75x and the second partition wall portion 90, and a muffler cavity 29 may be formed between the second partition wall portion 90 and the second portion 80. An example of the first partition wall portion 75x is provided integrally with the first portion 70 as a side wall on the second partition wall portion 90 side in the first portion 70. The discharge passage 150 connects the delivery port 53b of the blower 50 with the exhaust hole 95, which is an example of the second opening portion provided in the second partition wall portion 90. The connecting portion 93 connects the muffler cavity 29 with the discharge passage 150. The muffler cavity 29 includes a first cavity portion 29a, which is a cavity on the exhaust hole 95 side of the connecting portion 93 in the long side direction of the muffler cavity 29, and a second cavity portion 29b, which is a cavity on the delivery port 53b side of the connecting portion 93. Thus, in the second embodiment of the air supply device 10A, a branch type silencer is formed. In addition, the position of the connecting portion 93 can be set arbitrarily. In one example, Fig.21 As shown in (b), the connecting portion 93 is located closer to the exhaust hole 95 than the delivery port 53b in the longitudinal direction Y. Therefore, the length L1 of the first cavity portion 29a of the muffler cavity 29 is smaller than the length L2 of the second cavity portion 29b. Fig.21 In the air supply device 10A shown in (a) and (b), the upper wall 76 (see Figure 8 ) is formed with an air intake hole (not shown) as an example of a first opening portion communicating with the air supply chamber 72.

[0155] exist Fig.21 In the first mode of the air supply device 10A shown in (a), the second partition wall portion 90 is accommodated in the space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80, and the portion of the first portion 70 on the side where the delivery port 53b is provided is accommodated in the space surrounded by the side wall 91 and the peripheral wall 92 of the second partition wall portion 90. Fig.21 In (a), the second partition wall portion 90 and the portion of the first portion 70 on the side where the delivery port 53 b is provided are accommodated in a space surrounded by the side wall 81 and the peripheral wall 82 of the second portion 80 .

[0156] exist Fig.21 In the second mode of the air supply device 10A shown in (b), the side wall 75 of the first part 70 and the side wall 91 of the second partition wall part 90 are separated from each other, thereby forming an exhaust path 150, and the side wall 91 of the second partition wall part 90 and the side wall 81 of the second part 80 are separated from each other, thereby forming a silencer cavity 29.

[0157] According to this structure, in the second mode of the air supply device 10A, the exhaust path 150 is formed outside the first part 70, and thus the silencer cavity 29 connected to the exhaust path 150 is formed outside the first part 70. Therefore, the silencer cavity 29 becomes a space dedicated to the silencer, thereby improving the silencing effect. Therefore, it is possible to suppress the reduction in the quietness when the air supply device 10A and the fluid control device 1 are used. In addition, in the first mode of the air supply device 10A, for example, when the patient P carries the air supply device 10A and the fluid control device 1, the volume of the exhaust path 150 is reduced, thereby making the housing 20A small, thereby improving the portability of the air supply device 10A and the fluid control device 1 when not in use.

[0158] In the first embodiment, the mounting structure of the first part 33 and the second part 40 can be changed arbitrarily. For example, the mounting structure of the first part 33 and the second part 40 can also be changed as shown in the following (C1) and (C2). In addition, the mounting structure of the first part 70 and the second partition wall 90 of the air supply device 10A of the second embodiment, the mounting structure of the second partition wall 90 and the second part 80 of the air supply device 10A of the third embodiment and the fourth embodiment can also be changed in the same manner.

[0159] (C1) Fig. 22 As shown in (a) and (b), the partition wall 31 and the first side wall 35 of the first portion 33 have a first recess 35e and a second recess 35f. The first recess 35e and the second recess 35f are formed around the entire circumference of the partition wall 31 and the first side wall 35. The first recess 35e and the second recess 35f are spaced apart in the height direction Z. The side wall 42 of the second portion 40 has a protrusion 42b that can be engaged with the first recess 35e and the second recess 35f. The protrusion 42b is formed around the entire circumference of the side wall 42 at the lower end portion of the side wall 42. Fig. 22 In the first embodiment of the air supply device 10A shown in (a), the first recessed portion 35e is fitted into the raised portion 42b. Fig. 22 In the second mode of the air supply device 10A shown in (b), the second recess 35f is engaged with the convex portion 42b. In this way, in the first and second modes of the air supply device 10A, each recess 35e, 35f is engaged with the convex portion 42b, thereby maintaining the relative position of the first part 33 and the second part 40 in the height direction Z.

[0160] (C2) Fig.23 , Fig.24As shown in (a) and (b) of FIG. 1 , the first portion 33 has a flange portion 35g, a plurality of notches 35h provided on the flange portion 35g, and a plurality of claws 35i provided at positions corresponding to the notches 35h. In addition, an annular elastic member 38C is installed on the first portion 33 so as to contact the lower surface of the flange portion 35g and the outer surface of the first side wall 35. In addition, for convenience, Fig.23 The elastic member 38 is omitted. The claw portion 35i is located below the elastic member 38C. Fig.24 As shown in (a) and (b), the side wall 42 of the second portion 40 has a pair of protrusions 42c sandwiched between the elastic member 38C and the claw portion 35i. The pair of protrusions 42c are formed at the lower end of the side wall 42 and around the entire circumference of the side wall 42. Fig.24 In the first embodiment of the air supply device 10A shown in (a), the pair of protrusions 42c are located below the upper end of the claw portion 35i. Fig.24 In the second mode of the air supply device 10A shown in (b), a pair of protrusions 42c are clamped by the claws 35i and the elastic member 38C. At this time, the pair of protrusions 42c are pressed toward the elastic member 38C by the claws 35i. Thus, the sealing between the pair of protrusions 42c and the elastic member 38C can be improved. Therefore, it is possible to suppress air leakage from between the first side wall 35 of the first part 33 and the side wall 42 of the second part 40, thereby suppressing the reduction of the flow rate characteristics of the air supply device 10A.

[0161] In the second embodiment, the partition wall 60 is formed integrally with the first portion 33, but the structure of the partition wall 60 is not limited thereto and can be arbitrarily changed. For example, the partition wall 60 can also be formed integrally with the second portion 40. In addition, the partition wall 60 can also be formed separately from the first portion 33 and the second portion 40. In short, the partition wall 60 can be any structure as long as it separates the space in the first portion 33 from the space in the second portion 40.

[0162] In the fifth embodiment, the structure of the movable portion 114 of the muffler 110 can be arbitrarily changed. For example, the muffler 110 includes a cylindrical first connection portion 112 and a cylindrical second connection portion 113 that accommodates the first connection portion 112. The movable portion may be formed into a structure in which the first connection portion 112 and the second connection portion 113 can move relative to each other, such as the sliding structure of the movable portion 25 that enables the first portion 33 and the second portion 40 of the housing 20 to move relative to each other in the first embodiment, instead of the bellows-shaped movable portion.

[0163] In the fifth embodiment, the air sending device 10A may include the casings 20 and 20A of the first to fourth embodiments instead of the casing 20B.

[0164] In each embodiment, the first portion 33 may constitute a part of the casing 53 of the blower 50 .

[0165] In the third and fourth embodiments, the position of the outer air intake hole 94 can be changed arbitrarily. Fig.25 As shown in (a), the outer air intake hole 94 may also be formed in the peripheral wall 82 of the second portion 80. In this case, Fig.25 As shown in (b), the suction path 28 is formed between the second partition wall portion 90 and the second portion 80. An intermediate suction hole 96 is provided in the portion of the second partition wall portion 90 that is opposite to the inner suction hole 75a. A passage 28a having a constant passage cross-sectional area is formed between the intermediate suction hole 96 of the suction path 28 and the connecting portion 93. The passage 28a is a passage from the intermediate suction hole 96 of the suction path 28 to the connecting portion 93. A partition wall 97 capable of being inserted into the inner suction hole 75a is formed integrally with the second partition wall portion 90 near the intermediate suction hole 96. Fig.25 In the case where the air supply device 10A shown in (a) is the first embodiment, the partition wall 97 is located in the air supply chamber 72. Fig.25 In the case where the air supply device 10A shown in (b) is the second mode, the partition wall 97 partitions the space between the side wall 75 of the first part 70 and the second partition wall part 90. Therefore, the muffler cavity 29 is formed as a space surrounded by the side wall 75 of the first part 70, the second partition wall part 90, and the partition wall 97. The muffler cavity 29 has a first cavity part 29a which is a space on the side of the outer air intake hole 94 relative to the connecting part 93 and a second cavity part 29b which is a space on the side of the partition wall 97 relative to the connecting part 93. According to this structure, the same effect as that of the third embodiment can be obtained. In addition, the length L1 of the first cavity part 29a and the length L2 of the second cavity part 29b can be arbitrarily changed according to the noise of the frequency to be reduced. In the fourth embodiment, when the outer air intake hole 94 is formed on the peripheral wall 82 of the second part 80, the partition part 100 is provided between the first partition wall part 75x and the second partition wall part 90.

[0166] ·exist Fig.21 In the air supply device 10A, the position of the exhaust hole 95 can be changed arbitrarily. Fig.26 As shown in (a), the exhaust hole 95 may also be provided on the peripheral wall 82 of the second portion 80. In this case, Fig.26 As shown in (b), the discharge path 150 is formed between the second partition wall 90 and the second part 80. An inner exhaust hole 98 is formed in the portion of the second partition wall 90 that is opposite to the delivery port 53b. A partition wall 99 that can be inserted into the side wall 75 of the first part 70 on the side of the second partition wall 90 is formed integrally with the second partition wall 90 near the inner exhaust hole 98. Fig.26In the case where the air supply device 10A shown in (a) is the first embodiment, the partition wall 99 is located in the air supply chamber 72. Fig.26 In the case where the air supply device 10A shown in (b) is the second mode, the partition wall 99 partitions the space between the side wall 75 of the first part 70 and the second partition wall part 90. Therefore, the muffler cavity 29 is formed as a space surrounded by the side wall 75 of the first part 70, the second partition wall part 90, and the partition wall 99. The muffler cavity 29 has a first cavity part 29a as a space on the exhaust hole 95 side than the connecting part 93 and a second cavity part 29b as a space on the partition wall 99 side than the connecting part 93. In addition, the length L1 of the first cavity part 29a and the length L2 of the second cavity part 29b can be arbitrarily changed according to the noise of the frequency to be reduced.

[0167] In the third and fourth embodiments, a Helmholtz type muffler may also be used. Specifically, the cross-sectional area of ​​the passage from the connecting portion 93 to a part of the muffler cavity 29 (the inlet portion of the muffler cavity 29 connected to the suction path 28) is made sufficiently smaller than the other cross-sectional areas of the passage of the muffler cavity 29. Thus, the same effect as that of the third embodiment can be obtained.

[0168] In the third embodiment and the fourth embodiment, the control device 10B can also change the rotation speed of the air blower 50 (the rotation speed of the motor 51) in multiple levels. In addition, the air supply device 10A can also change the volume of the casing 20A in multiple levels. Specifically, the air supply device 10A can also change the volume of the muffler cavity 29 surrounded by the second partition wall portion 90 and the second portion 80 in multiple levels. In one example, the setting level of the rotation speed of the air blower 50 is associated with the setting level of the volume of the muffler cavity 29. In this case, the rotation speed of the air blower 50 is set to avoid the frequency at which the penetration loss becomes 0 in the frequency characteristics of the penetration loss determined by the volume of the muffler cavity 29. Preferably, the rotation speed of the air blower 50 is set at a frequency at which the penetration loss becomes the maximum in the frequency characteristics of the penetration loss determined by the volume of the muffler cavity 29.

[0169] According to this configuration, by changing the internal volume of the housing 20A, it is possible to avoid a frequency at which the penetration loss due to the rotation speed of the air blower 50 becomes 0. Therefore, it is possible to suppress a decrease in the quietness of the air blower 10A during use.

[0170] In the first to fourth embodiments, the movable parts 25, 27A, 27B of the air supply device 10A may also have a motor as a driving source and a rotation-linear motion conversion mechanism that changes the rotation of the output shaft of the motor into a linear motion. The movable parts 25, 27A, 27B change between the first mode and the second mode based on the operation of the operating part 22. In one example, the movable parts 25, 27A, 27B change from the first mode to the second mode when the power supply of the fluid control device 1 is turned on by the operation of the operating part 22, or when the air blower 50 is driven. The increase in the volume in the housing 20, 20A in the second mode may also be changed according to the patient P by the motor. In one example, the increase in the volume in the housing 20, 20A in the second mode is changed according to the rotation speed of the air blower 50. Thus, the noise can be suppressed according to the noise characteristics when the air blower 50 rotates at a rotation speed suitable for the patient P.

[0171] In each embodiment, the air supply device 10A may further include a reporting unit that reports the mode of the air supply device 10A to the patient P. An example of the reporting unit is a light emitting unit provided in the housing 20 (20A, 20B). When the air supply device 10A is in the second mode, the light emitting unit emits light. An example of the light emitting unit is a light emitting diode (LED).

[0172] In each embodiment, the air supply device 10A and the control device 10B may be formed separately. In this case, the air supply device 10A and the control device 10B may be configured separately. The separated air supply device 10A and the control device 10B may be electrically connected by wires such as a harness or wirelessly by radio waves.

[0173] Description of Reference Numerals

[0174] 1…fluid control device; 10A…air supply device; 11…tube; 12…mask; 20, 20A, 20B…housing; 25, 114, 120, 130…movable part; 27A…first movable part (movable part); 27B…second movable part (movable part); 28…inhalation path; 33, 70…first part; 35a…exhaust part (second opening); 39x…inhalation hole (first opening); 40, 80…second part; 35d, 4 1a…intake hole (first opening); 41a…exhaust hole (second opening); 50…blower; 53a…suction port; 53b…exhaust port; 60…partition wall; 61, 93…connecting portion; 75b…exhaust hole (second opening); 75x…first partition wall; 90…second partition wall; 94…outer intake hole (first opening); 95…exhaust hole (second opening); 100…partition; 110…silencer; 150…exhaust path.

Claims

1. An air supply device, characterized in that: have: a blower having a motor constituting a driving source and an impeller mounted on an output shaft of the motor; and a casing having a first opening portion into which a fluid flows when the blower is driven and a second opening portion from which the fluid is discharged when the blower is driven, and accommodating the blower, The housing can be extended or retracted to make the internal volume of the housing variable. The housing includes a first portion on which the blower is disposed and a second portion covering one direction of the first portion. The housing is capable of expansion and contraction so that the volume of the internal space surrounded by the first part and the second part is variable. The housing has a movable portion for allowing the first portion and the second portion to move relative to each other. The housing has a partition wall that separates a space in the first portion from a space in the second portion. The partition wall has a connecting portion that connects the space in the first portion with the space in the second portion. The second portion has the first opening or the second opening, An opening surface of the communicating portion on the second portion side faces an opening surface of the first opening portion or the second opening portion of the second portion.

2. An air supply device, characterized in that: have: a blower having a motor constituting a driving source and an impeller mounted on an output shaft of the motor; and a casing having a first opening portion into which a fluid flows when the blower is driven and a second opening portion from which the fluid is discharged when the blower is driven, and accommodating the blower, The housing can be extended or retracted to make the internal volume of the housing variable. The housing includes a first portion on which the blower is disposed and a second portion covering one direction of the first portion. The housing is capable of expansion and contraction so that the volume of the internal space surrounded by the first part and the second part is variable. The housing has a movable portion for allowing the first portion and the second portion to move relative to each other. The housing has a partition wall that separates a space in the first portion from a space in the second portion. The partition wall has a connecting portion that connects the space in the first portion with the space in the second portion. further comprising a suction passage connecting the first opening portion with a suction port of the blower, The partition wall portion includes a first partition wall portion and a second partition wall portion, The first partition wall portion is arranged between the first portion and the second partition wall portion, The second partition wall portion is arranged between the first partition wall portion and the second portion, The first portion has the second opening, The suction path is formed between the first partition wall portion and the second partition wall portion or between the second partition wall portion and the second portion.

3. The air supply device according to claim 2, characterized in that: The second portion has a partition portion that partitions an internal space formed by the second partition wall portion and the second portion.

4. An air supply device, characterized in that: have: a blower having a motor constituting a driving source and an impeller mounted on an output shaft of the motor; and a casing having a first opening portion into which a fluid flows when the blower is driven and a second opening portion from which the fluid is discharged when the blower is driven, and accommodating the blower, The housing can be extended or retracted to make the internal volume of the housing variable. The housing includes a first portion on which the blower is disposed and a second portion covering one direction of the first portion. The housing is capable of expansion and contraction so that the volume of the internal space surrounded by the first part and the second part is variable. The housing has a movable portion for allowing the first portion and the second portion to move relative to each other. The housing has a partition wall that separates a space in the first portion from a space in the second portion. The partition wall has a connecting portion that connects the space in the first portion with the space in the second portion. further comprising a discharge passage connecting the second opening portion with a discharge outlet of the blower, The partition wall portion includes a first partition wall portion and a second partition wall portion, The first partition wall portion is arranged between the first portion and the second partition wall portion, The second partition wall portion is arranged between the first partition wall portion and the second portion, The first portion has the first opening, The discharge path is formed between the first partition wall portion and the second partition wall portion or between the second partition wall portion and the second portion.

5. The air supply device according to claim 2 or 4, characterized in that: The second partition wall portion is attached to the first portion so as to be movable relative to the first portion.

6. The air supply device according to claim 5, characterized in that: The second portion is mounted on the second partition wall portion so as to be movable relative to the second partition wall portion. A moving direction of the second partition wall portion relative to the first portion and a moving direction of the second portion relative to the second partition wall portion are the same direction.

7. The air supply device according to any one of claims 1, 2 or 4, characterized in that: The movable portion connects the first portion and the second portion so as to seal internal spaces of the first portion and the second portion, and is extendable and retractable in a relative movement direction of the first portion and the second portion.

8. The air supply device according to any one of claims 1, 2 or 4, characterized in that: The movable portion is capable of relatively moving the first part and the second part between a first mode in which one of the first part and the second part is accommodated in the other of the first part and the second part and a second mode in which the accommodated one of the first part and the second part protrudes from the other of the first part and the second part.

9. The air supply device according to any one of claims 1, 2 or 4, characterized in that: The housing further includes a muffler detachably mounted on the first opening or the second opening. The muffler is extendable and retractable so that the internal volume of the muffler is variable.

10. The air supply device according to any one of claims 1, 2 or 4, characterized in that: The rotation speed of the blower can be set to multiple levels. The housing is capable of changing an internal volume of the housing into a plurality of levels.

11. A fluid control device, characterized in that: have: The air supply device according to any one of claims 1 to 10; and A tube is provided for connecting the second opening of the air supply device to a face mask or a nasal cannula and supplying gas from the second opening to the face mask or the nasal cannula.

Images