WO2021149533A1 - Dispositif d'acquisition d'informations de gaz - Google Patents

Dispositif d'acquisition d'informations de gaz Download PDF

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Publication number
WO2021149533A1
WO2021149533A1 PCT/JP2021/000655 JP2021000655W WO2021149533A1 WO 2021149533 A1 WO2021149533 A1 WO 2021149533A1 JP 2021000655 W JP2021000655 W JP 2021000655W WO 2021149533 A1 WO2021149533 A1 WO 2021149533A1
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WO
WIPO (PCT)
Prior art keywords
gas
gas suction
suction
information acquisition
discharge device
Prior art date
Application number
PCT/JP2021/000655
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English (en)
Japanese (ja)
Inventor
清 大森
信貴 清水
匡信 藤井
敦史 田坂
雄介 秀島
Original Assignee
ミネベアミツミ株式会社
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Publication date
Application filed by ミネベアミツミ株式会社 filed Critical ミネベアミツミ株式会社
Publication of WO2021149533A1 publication Critical patent/WO2021149533A1/fr

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C21/00—Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/047—Beds for special sanitary purposes, e.g. for giving enemas, irrigations, flushings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric drive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath

Definitions

  • the present invention relates to a gas information acquisition device.
  • This gas information acquisition device includes, for example, a tank, a pump, and an odor sensor, and the pump sends the gas inside the tank to the odor sensor (see, for example, Patent Document 1).
  • the present invention has been made in view of the above points, and an object of the present invention is the miniaturization of a gas information acquisition device.
  • the gas information acquisition device includes a microblower that drives a piezoelectric element to suck and discharge the gas, and a sensor that is arranged on the gas discharge side of the microblower and acquires the gas information.
  • a tubular member connected to the suction side of the gas suction / discharge device and extending to the measurement region of the gas information, and an end portion of the tubular member on the side not connected to the gas suction / discharge device.
  • the tubular member comprises a cavity that is part of the gas flow path, and the gas suction port has a suction path that communicates with the cavity and the suction path.
  • a flow path direction changing unit that bends the direction of the cavity with respect to the direction in which the cavity extends is provided.
  • the gas information acquisition device can be miniaturized.
  • FIG. 1 is a perspective view schematically showing a bed in which the gas information acquisition device according to the first embodiment is arranged.
  • a mattress 810 is laid on the bed 800, a part of the area on the mattress 810 is covered with sheets 820, and the gas information acquisition device 3 is arranged on the bed 800.
  • the gas information acquisition device 3 is fixed to, for example, the side wall of the footboard of the bed 800 with screws or the like.
  • FIG. 2 is a partially enlarged perspective view of the vicinity of the case of the gas information acquisition device according to the first embodiment.
  • the gas information acquisition device 3 mainly includes a gas suction / discharge device 1, a case 300, and a tube 340.
  • the gas suction / discharge device 1 arranged in the case 300 sucks the gas in the measurement region through the tube 340, and the sucked gas is applied to the sensor 91 (described later) of the gas suction / discharge device 1. It is a device that discharges gas toward the gas and acquires gas information (odor, humidity, etc.) with the sensor 91.
  • the bed 800, the mattress 810, and the sheets 820 are not components of the gas information acquisition device 3.
  • the gas to be detected is air.
  • the box-shaped case 300 is divided into a plurality of regions 320 arranged in a row by a partition plate 310.
  • the gas suction / discharge device 1 is arranged so as to face the same direction.
  • the case 300 and the partition plate 310 are made of, for example, ABS resin or the like.
  • a plate-shaped upper lid 330 is provided on the case 300, but the illustration is omitted in FIG.
  • six gas suction / discharge devices 1 are arranged in the case 300, but the number of gas suction / discharge devices 1 may be increased or decreased as needed.
  • FIG. 3 is a partially enlarged side view of the vicinity of the case of the gas information acquisition device according to the first embodiment.
  • FIG. 4 is a partially enlarged cross-sectional view of the vicinity of the case of the gas information acquisition device according to the first embodiment.
  • the tube 340 is a tubular member having a hollow inside, and one end thereof is an upper case on the suction side of the gas suction / discharge device 1 through a through hole formed in the wall surface of the case 300. It is connected to the protruding portion 61 of 60 (see FIG. 8 and the like described later for details).
  • the cavity of tube 340 becomes part of the gas flow path.
  • the tube 340 is made of an elastic material such as rubber or vinyl.
  • the inner and outer diameters of the tube 340 can be appropriately determined as needed, but are, for example, about several mm.
  • the tube 340 is detachably fixed to the wall surface of the case 300 by fixing members 351, 352, and 353.
  • fixing members 351, 352, and 353 For example, by making the fixing member 352 and the fixing member 353 screwable, the tube 340 can be easily attached and detached by rotating the fixing member 353.
  • the tube 340 extends from the wall surface of the case 300 to the top of the bed 800, which is a measurement region for gas information.
  • the tip end side of the tube 340 extending from the wall surface of the case 300 is arranged between the mattress 810 and the sheets 820 of the bed 800.
  • the tube 340 is fixed to a cushion 830 having a cushioning property, as will be described later (see FIG. 7 and the like).
  • each tube 340 is juxtaposed with a predetermined interval between the mattress 810 and the sheets 820 of the bed 800.
  • the tubes 340 By juxtaposing the plurality of tubes 340, it is possible to prevent the tubes 340 from being unable to suck the gas in a desired region due to the misalignment of the tubes 340.
  • FIG. 5 is a partial perspective view of the vicinity of the tube tip of the gas information acquisition device according to the first embodiment.
  • FIG. 6 is a cross-sectional view of a gas suction port of the gas information acquisition device according to the first embodiment.
  • a gas suction port 360 is attached to the end of the tube 340 on the side not connected to the gas suction / discharge device 1.
  • the gas suction port 360 is provided on the flow path direction conversion unit 361 that bends in a substantially L shape, the plate-shaped portion 362 provided on one end side of the flow path direction conversion unit 361, and the other end side of the flow path direction conversion unit 361. It has a connection portion 363 provided.
  • the flow path direction changing portion 361, the plate-shaped portion 362, and the connecting portion 363 are integrally molded, for example.
  • One continuous suction path 364 is provided in the flow path direction changing section 361, the plate-shaped section 362, and the connecting section 363.
  • the gas suction port 360 can be formed of, for example, natural rubber, synthetic rubber (silicone rubber, urethane rubber, butyl rubber, isoprene rubber, etc.), thermoplastic elastomer, or the like. By manufacturing the gas suction port 360 with such a material, it is possible to make it difficult for the monitored person to give a feeling of strangeness (such as a rugged feeling) when sleeping.
  • the gas suction port 360 bends in the direction of the suction path 364 communicating with the cavity of the tube 340 and the direction of the suction path 364 with respect to the direction in which the cavity of the tube 340 extends (the direction parallel to the upper surface of the bed 800). It is provided with a flow path direction changing unit 361.
  • the gas suction port 360 converts the direction of the suction path 364 into a direction perpendicular to the direction in which the cavity of the tube 340 extends.
  • parallel and vertical do not mean only parallel and vertical in a strict sense, but also include cases of substantially parallel and vertical within a range that does not impair the effect of the present application.
  • the plate-shaped portion 362 is formed in a disk shape, for example, and has a diameter larger than that of the flow path direction changing portion 361. However, the plate-shaped portion 362 may have a shape other than a disk shape such as a rectangular shape.
  • the connecting portion 363 has a tapered portion 363a, a tapered portion 363b, and a tapered portion 363c that are continuous in the axial direction.
  • the tapered portion 363a, the tapered portion 363b, and the tapered portion 363c are formed in a truncated cone shape, for example, whose diameter is reduced as the distance from the flow path direction conversion portion 361 increases.
  • the maximum diameter of the tapered portion 363a is smaller than the maximum diameters of the tapered portions 363b and 363c, and the maximum diameter of the tapered portion 363b is smaller than the maximum diameter of the tapered portion 363c. Further, the maximum diameter of the tapered portion 363a is larger than the minimum diameter of the tapered portion 363b, and the maximum diameter of the tapered portion 363b is larger than the minimum diameter of the tapered portion 363c. That is, on the outer peripheral side of the connecting portion 363, a step-like step is formed in which the maximum diameter increases as the distance from the tip side increases.
  • a tube 340 is connected to the connecting portion 363 by press fitting, but since a stepped step in which the maximum diameter increases as the distance from the tip side increases is formed on the outer peripheral side of the connecting portion 363, the tubes 340 having a plurality of inner diameters are formed. Can be easily connected.
  • FIG. 7 is a cross-sectional view illustrating the positional relationship between the gas suction port and the sheets.
  • a cushion 830 in which the gas suction port 360 is positioned is arranged on the mattress 810.
  • the gas suction port 360 is inserted and positioned in the through hole 830x of the cushion 830 so that the plate-shaped portion 362 protrudes from the upper surface of the cushion 830.
  • Sheets 820 are arranged on the upper surface of the cushion 830 so as to cover the plate-shaped portion 362 of the gas suction port 360. According to the structure of FIG. 7, since the end of the suction path 364 provided in the plate-shaped portion 362 faces the sheets 820 side reliably, the gas on the sheets 820 side can be reliably sucked.
  • the cushion 830 and the mattress 810 are formed of a cushioning member such as urethane and are easily deformed. Therefore, even if the tube 340 is arranged on the lower surface side of the cushion 830, the tube 340 will not be crushed. ..
  • the cavity of the tube 340 extends in the direction parallel to the upper surface of the bed 800, but the gas suction port 360 is in the direction of the suction path 364 communicating with the cavity of the tube 340 in the direction away from the upper surface of the bed 800.
  • the direction in which the suction path 364 is separated from the upper surface of the bed 800 is, for example, a direction perpendicular to the upper surface of the bed 800.
  • the cushion 830 does not have to be used.
  • the gas suction port 360 and the tube 340 may be placed directly on the mattress 810 so that the plate-shaped portion 362 faces the sheets 820 side.
  • the gas suction port 360 and the tube 340 may be embedded in the mattress 810 so that the plate-shaped portion 362 faces the sheets 820 side.
  • the tip of the tube 340 is closed with a cap, and a hole serving as the gas suction port is formed at an arbitrary position on the side surface of the tube 340.
  • the tube 340 is soft and flexible to some extent, it is very difficult to surely direct the hole to the upper side (sheet 820 side). Further, it is very difficult to drill a hole in the tube 340 because the diameter of the tube 340 is small (for example, the outer diameter is about ⁇ 5 mm). Further, since a cap is required at the tip of the tube 340, the cost of parts and the cost of installation are required.
  • the gas suction port 360 is attached to the tip of the tube 340, as shown in FIG. 7, the end of the suction path 364 provided in the plate-shaped portion 362 is surely on the sheet 820 side. Therefore, the gas on the sheet 820 side can be reliably sucked. Further, since it is not necessary to provide a hole in the tube 340, the processing cost can be reduced.
  • the gas information acquisition device 3 is used by being attached to a bed 800 placed in a hospital, for example.
  • a patient wearing a diaper is sleeping on the sheets 820 of the bed 800.
  • the gas suction / discharge device 1 is operated constantly or intermittently in the gas information acquisition device 3, air in the vicinity of the sheets 820 is sucked from the suction path 364 of the gas suction port 360, and the sensor 91 of the gas suction / discharge device 1 is used. To detect.
  • the gas suction port 360 By analyzing the detection result of the sensor 91 with an analysis device arranged outside the gas information acquisition device 3, it is possible to reliably acquire air information in the vicinity of the sheets 820 via the gas suction port 360. For example, if an odor sensor is used as the sensor 91, information on the odor of air in the vicinity of the sheets 820 can be reliably acquired via the gas suction port 360. Further, if a humidity sensor is used as the sensor 91, information on the humidity of the air in the vicinity of the sheets 820 can be reliably acquired via the gas suction port 360.
  • the analyzer detects that excretion has occurred on the bed 800
  • the detection result is transmitted to the hospital nurse or the like by voice or light blinking, so that the nurse or the like sleeps on the bed 800, for example.
  • the diaper is changed in a short time from the excreted state, so that the patient is unsanitary for a short time and uncomfortable for a short time. Since the nurses who change the diapers do not change the diapers that have been left for a long time, they can be changed smoothly. In addition, hygiene can be ensured.
  • FIG. 8 is a perspective view illustrating the gas suction / discharge device according to the first embodiment.
  • FIG. 9 is a cross-sectional view illustrating the gas suction / discharge device according to the first embodiment, and shows a vertical cross section cut so as to pass through the center of the gas suction / discharge device 1 and divide the strain gauge 100 into two in the longitudinal direction.
  • FIG. 10 is an exploded perspective view illustrating the gas suction / discharge device according to the first embodiment.
  • the gas suction / discharge device 1 mainly includes a lower case 10, a micro blower 20, a micro blower support 30, a filter support plate 40, a filter unit 50, and an upper case 60. , The sensor 91 and the strain gauge 100.
  • the lower case 10, the micro blower 20, the micro blower support 30, the filter support plate 40, the filter unit 50, and the upper case 60 are fixed by screws 70, but are not adhered to each other.
  • the gas 70 can be replaced by removing the screw 70 and disassembling the gas suction / discharge device 1.
  • the gas suction / discharge device 1 is a device that sucks gas from the upper case 60 side and discharges it to the lower case 10 side by driving the piezoelectric element of the microblower 20, and detects odor, humidity, etc. with the sensor 91. be.
  • the gas sucked from the upper case 60 side is discharged to the lower case 10 side via the filter unit 50.
  • the filter unit 50 By arranging the filter unit 50 on the gas suction side (upper case 60 side) of the microblower 20, it is possible to prevent dust, dust, etc. from entering the inside of the gas suction / discharge device 1.
  • the gas to be sucked and discharged is typically air, but oxygen, nitrogen, carbon monoxide, hydrogen, carbon dioxide, hydrocarbons, VOCs (Volatile Organic Compounds), formaldehyde, alternative flones, and various types. It may be gas or the like.
  • gases include flammable gas, toxic gas, semiconductor material gas, inert gas, city gas, LP gas and the like.
  • the upper case 60 side is the upper side or one side
  • the lower case 10 side is the lower side or the other side.
  • the surface of each part on the upper case 60 side is defined as one surface or upper surface
  • the surface on the lower case 10 side is defined as the other surface or lower surface.
  • the gas suction / discharge device 1 can be used in an upside-down state, or can be arranged at an arbitrary angle.
  • the plan view means that the object is viewed from the normal direction of the upper surface of the upper case 60
  • the planar shape refers to the shape of the object viewed from the normal direction of the upper surface of the upper case 60. ..
  • FIG. 1 are perspective views illustrating a method of assembling the gas suction / discharge device according to the first embodiment.
  • the lower case 10 is a substantially disk-shaped member formed of ABS resin or the like, and a protruding portion 11 projecting to the opposite side of the microblower 20 is formed on the lower surface thereof.
  • a through hole 12A serving as a flow path for discharging gas and a through hole 12B for guiding gas to the resistor 130 of the strain gauge 100 are formed in a portion of the protrusion 11 facing the microblower 20.
  • a gauge mounting portion 17 for fixing the strain gauge 100 is formed on the same side as the protruding portion 11 of the lower case 10.
  • a recess 13 for positioning the microblower 20 is formed on the upper surface side (opposite side of the protruding portion 11) of the lower case 10.
  • the recess 13 is provided in a substantially central portion on the upper surface side of the lower case 10, and is provided in the radial direction of the first portion 131 on which the main body 21 of the micro blower 20 is arranged and the upper surface side of the lower case 10, and the micro blower 20 is provided.
  • the first portion 131 and the second portion 132 communicate with each other.
  • a substantially semicircular recess 14 communicating with the first portion 131 is formed from the three inner walls excluding the inner wall provided with the second portion 132 to the outside. There is. Further, on the outer peripheral side of the lower case 10, three through holes 15 into which screws for fixing the members are inserted are formed at substantially equal intervals.
  • the microblower 20 is arranged in the recess 13 provided in the lower case 10.
  • the microblower 20 has a main body 21 and an external connection terminal 22.
  • the main body 21 of the microblower 20 is arranged in the first portion 131 of the recess 13, and the external connection terminal 22 of the microblower 20 is arranged in the second portion 132 of the recess 13.
  • the depth of the recess 13 is formed to be about the same as the thickness of the microblower 20. Therefore, the upper surface of the lower case 10 and the upper surface of the microblower 20 are substantially flush with each other.
  • the microblower support 30 is inserted into the recesses 23 (counterbore portions) provided on the outer peripheral portion (for example, the four corners) on one side of the microblower 20.
  • the microblower support 30 is a low-load elastic body that is softer than the lower case 10 and the filter support plate 40 and is made of a easily deformable material such as urethane rubber.
  • Examples of low-load elastic bodies other than urethane rubber include elastomeric materials, natural rubber, synthetic rubber (silicone rubber, urethane rubber, butyl rubber, isoprene rubber, etc.) and the like.
  • the low-load elastic body is a soft moldable material having elasticity like rubber.
  • micro blower support 30 is not adhered, but is only inserted into the recess 23.
  • One end of each microblower support 30 projects from the upper surface of the microblower 20.
  • the tip side of the external connection terminal 22 of the microblower 20 projects from the side surface of the lower case 10, and the piezoelectric element 215a (described later) constituting the microblower 20 and the circuit provided outside the gas suction / discharge device 1 are electrically connected. Enables connection.
  • the three semicircular recesses 14 located on the outside of the microblower 20 are provided so that the microblower 20 can be easily removed when the microblower 20 is replaced for maintenance or the like. That is, since each recess 14 exposes a part of the side surface of the micro blower 20, the side surface of the micro blower 20 can be pinched and easily removed.
  • the recess 14 may have a shape other than a semicircle as long as the side surface of the microblower 20 can be pinched. Further, the number of recesses 14 does not have to be three as long as the side surface of the microblower 20 can be pinched.
  • the filter support plate 40 is a substantially disk-shaped member formed of ABS resin or the like, and a through hole 41 that is a part of a gas flow path is formed in a substantially central portion.
  • a recess 42 for positioning the filter unit 50 is formed around the through hole 41.
  • the recess 42 is provided in an annular shape along the outer circumference of the through hole 41, and the filter unit 50 is arranged.
  • the filter support plate 40 On the outer peripheral side of the filter support plate 40, three through holes 43 into which screws for fixing each member are inserted are formed at substantially equal intervals.
  • the filter support plate 40 is arranged so that the positions of the through holes 43 coincide with the through holes 15 of the lower case 10.
  • the filter support plate 40 is arranged on the lower case 10 and the micro blower 20.
  • the opening 219a (described later) of the microblower 20 is exposed in the through hole 41 of the filter support plate 40.
  • the filter support plate 40 When the filter support plate 40 is arranged on the lower case 10 and the micro blower 20, the protrusions of the respective micro blower supports 30 are arranged so as to face the lower case 10 with the micro blower 20 in between. It is pushed by and deformed (crushed). As a result, the microblower support 30 presses the microblower 20 toward the lower case 10, so that the microblower 20 is stably held in the recess 13 of the lower case 10.
  • the filter unit 50 is arranged in the recess 42 for positioning the filter unit 50 provided on the filter support plate 40.
  • the outer peripheral portion of the filter unit 50 is arranged in the recess 42.
  • the depth of the recess 42 is formed to be about the same as the thickness of the filter unit 50. Therefore, the upper surface of the filter support plate 40 and the upper surface of the filter unit 50 are substantially flush with each other.
  • the filter unit 50 is only positioned in the recess 42 of the filter support plate 40, and is not fixed with an adhesive or the like. That is, since the filter unit 50 is held by the filter support plate 40, which is a filter holding member, in a detachable state, it can be easily replaced by disassembling the gas suction / discharge device 1.
  • the upper case 60 is a substantially disk-shaped member formed of ABS resin or the like, and a protruding portion 61 projecting to the opposite side of the filter unit 50 is formed in a substantially central portion of the upper surface.
  • a through hole 62 that serves as a flow path for sucking gas is formed in a substantially central portion of the protruding portion 61.
  • the tip end side of the protrusion 61 is, for example, chamfered to form a truncated cone.
  • Three recesses 63 (counterbore portions) arranged at substantially equal intervals are formed on the outer peripheral side of the upper surface of the upper case 60, and screws for fixing each member are inserted into each recess 63.
  • Three through holes 64 are formed.
  • the upper case 60 is arranged on the filter support plate 40 and the filter unit 50, and the screw 70 is inserted into each through hole 64.
  • the screw 70 is inserted into, for example, the through hole 64 of the upper case 60, the through hole 43 of the filter support plate 40, and the through hole 15 of the lower case 10 and protrudes from the lower surface of the lower case 10 to the lower surface side of the lower case 10. It is fixed with a nut. As a result, the gas suction / discharge device 1 is completed.
  • the gap formed in the vicinity of the external connection terminal 22 of the microblower 20 is filled with an adhesive or the like. This is to prevent the gas inside the gas suction / discharge device 1 from leaking to the outside and to prevent dust or the like from entering the inside of the gas suction / discharge device 1.
  • FIG. 15 is a plan view illustrating a microblower of the gas suction / discharge device according to the first embodiment.
  • FIG. 16 is a cross-sectional view illustrating the microblower of the gas suction / discharge device according to the first embodiment, and shows a cross section taken along the line AA of FIG.
  • the microblower 20 is a device that drives a piezoelectric element to suck and discharge gas, and has a main body 21 and an external connection terminal 22.
  • the size of the main body 21 is, for example, about 20 mm in length ⁇ 20 mm in width ⁇ 2 mm in height.
  • the main body 21 has an outer case 211 and an inner case 212.
  • the outer case 211 covers the outside of the inner case 212 in a non-contact manner with a predetermined gap.
  • the outer case 211 has a cylindrical hollow portion 211a having an opening at the upper side, and a circular inner case 212 is housed in the hollow portion 211a with a predetermined gap.
  • the inner case 212 is elastically supported by the outer case 211 via, for example, a spring connecting portion 214.
  • a gas inflow passage 217a is formed between the outer case 211 and the inner case 212.
  • a plurality of spring connecting portions 214 are provided between the inner wall portion of the outer case 211 and the outer wall portion of the inner case 212 at intervals in the circumferential direction (four in the examples of FIGS. 15 and 16).
  • the diaphragm 215 has, for example, a unimorph structure in which a piezoelectric element 215a made of piezoelectric ceramic is attached to the central portion of a diaphragm 215b made of a thin elastic metal plate. By applying a voltage of a predetermined frequency to the piezoelectric element 215a, the entire diaphragm 215 is resonantly driven in a bending mode.
  • the piezoelectric element 215a is fixed to, for example, the surface of the diaphragm 215b opposite to the first blower chamber 216 side.
  • the wall portion 212a facing the diaphragm 215 constitutes one wall surface of the first blower chamber 216.
  • a through hole 212b is formed in a portion of the wall portion 212a facing the central portion of the diaphragm 215 to communicate the inside and the outside of the first blower chamber 216.
  • a wall portion 211b is provided at a portion of the outer case 211 facing the wall portion 212a, and a through hole 211c is formed at a central portion of the wall portion 211b, that is, a portion facing the through hole 212b.
  • the through hole 211c serves as a gas discharge port.
  • a predetermined inflow space 217b is formed between the wall portion 211b and the wall portion 212a, and the inflow space 217b constitutes a part of the above-mentioned inflow passage 217a.
  • the inflow space 217b has a role of guiding the gas introduced from the inflow passage 217a to the vicinity of the through holes 212b and 211c.
  • a wall portion 219 for forming the second blower chamber 218 with the diaphragm 215 is provided on the upper surface side of the outer case 211, that is, on the side opposite to the first blower chamber 216 via the diaphragm 215, a wall portion 219 for forming the second blower chamber 218 with the diaphragm 215 is provided. ..
  • the wall portion 219 is, for example, a lid member fixed so as to close the opening at the upper end of the outer case 211.
  • An opening 219a is formed in the central portion of the wall portion 219 to communicate the outside with the second blower chamber 218.
  • the volume of the second blower chamber 218 and the opening area of the opening 219a are set so that a pseudo resonance space can be formed with the vibration of the diaphragm 215.
  • the second blower chamber 218 and the inflow passage 217a are interconnected. Therefore, the gas that has flowed into the second blower chamber 218 through the opening 219a is supplied to the inflow space 217b through the inflow passage 217a.
  • the diaphragm 215 is resonantly driven, and the volume of the first blower chamber 216 changes periodically.
  • the volume of the first blower chamber 216 increases, the air in the inflow space 217b is sucked into the first blower chamber 216 through the through hole 212b.
  • the volume of the first blower chamber 216 is reduced, the air in the first blower chamber 216 is discharged to the inflow space 217b through the through hole 212b.
  • the diaphragm 215 Since the diaphragm 215 is driven by a high frequency, the high-speed, high-energy gas flow discharged from the through hole 212b to the inflow space 217b passes through the inflow space 217b and is discharged from the through hole 211c. At this time, the surrounding gas in the inflow space 217b is discharged from the through hole 211c while being involved. Therefore, a continuous gas flow is generated from the inflow passage 217a toward the inflow space 217b, and the gas is continuously discharged as a jet through the through hole 211c. The gas flow is shown by arrows in FIG.
  • FIG. 17 is an exploded perspective view illustrating a filter unit of the gas suction / discharge device according to the first embodiment.
  • the filter unit 50 has a filter support 51, a filter 52, and a filter support 55. These members are fixed to each other by, for example, double-sided tapes arranged on the outer periphery between the members in the order shown in the drawing.
  • the double-sided tape can have the same shape as the filter support 51, for example.
  • the filter supports 51 and 55 are members that hold the filter 52 from both sides, and are formed of, for example, a polyimide film.
  • the filter support 51 side is the gas suction side
  • the filter support 55 side is the gas discharge side.
  • the filter supports 51 and 55 may be provided as needed. For example, if the strength of the filter unit 50 is sufficient, one or both of the filter supports 51 and 55 may not be provided.
  • the filter 52 is a member that prevents dust and the like from entering the inside of the gas suction and discharge device 1, and preferably can remove dust and dirt at the submicron level.
  • the filter 52 can be formed of, for example, polyester, polyethylene, rayon, polypropylene, or the like, but any material may be used as long as it has the above functions.
  • FIG. 18 is a plan view illustrating the strain gauge according to the first embodiment.
  • FIG. 19 is a cross-sectional view (No. 1) illustrating the strain gauge according to the first embodiment, and shows a cross section taken along the line BB of FIG.
  • the strain gauge 100 has a base material 110, a resistor 130, a wiring 140, and a terminal portion 150.
  • the strain gauge 100 is fixed to the lower surface of the projecting portion 11 with double-sided tape, an adhesive, or the like so that the resistor 130 is exposed in the through hole 12B, and further, the strain gauge 100 is fixed to the gauge mounting portion 17. It is fixed with a screw 71.
  • the terminal portion 150 of the strain gauge 100 projects from the side surface of the lower case 10 and enables an electrical connection between the strain gauge 100 and a circuit provided outside the gas suction / discharge device 1.
  • the base material 110 of the strain gauge 100 also serves as a strain-causing body.
  • the base material 110 is a member that serves as a base layer for forming the resistor 130 and the like, and has flexibility.
  • the thickness of the base material 110 is not particularly limited and may be appropriately selected depending on the intended purpose, but may be, for example, about 5 ⁇ m to 500 ⁇ m. In particular, when the thickness of the base material 110 is 5 ⁇ m to 200 ⁇ m, the strain transmission from the surface of the strain generating body 54 bonded to the lower surface of the base material 110 via double-sided tape or the like, and the dimensional stability to the environment In terms of insulation, it is preferable in terms of insulation, and 10 ⁇ m or more is more preferable.
  • the base material 110 is, for example, PI (polyetherketone) resin, epoxy resin, PEEK (polyetheretherketone) resin, PEN (polyetheretherketone) resin, PET (polyethylene terephthalate) resin, PPS (polyphenylene sulfide) resin, polyolefin resin and the like. It can be formed from the insulating resin film of.
  • the film refers to a member having a thickness of about 500 ⁇ m or less and having flexibility.
  • the base material 110 may be formed of, for example, an insulating resin film containing a filler such as silica or alumina.
  • Examples of materials other than the resin of the base material 110 include SiO 2 , ZrO 2 (including YSZ), Si, Si 2 N 3 , Al 2 O 3 (including sapphire), ZnO, and perovskite ceramics (CaTIO 3 ,). BaTIO 3 ) and the like can be mentioned. Further, as the material of the base material 110 , a metal such as aluminum, an aluminum alloy (duralumin), or titanium may be used. In this case, for example, an insulating film is formed on the metal base material 110.
  • the resistor 130 is a thin film formed on the base material 110 in a predetermined pattern, and is a sensitive portion that undergoes strain to cause a resistance change.
  • the predetermined pattern is, for example, a pattern that folds back in a zigzag pattern.
  • the resistor 130 may be formed directly on the upper surface 110a of the base material 110, or may be formed on the upper surface 110a of the base material 110 via another layer. In FIG. 18, for convenience, the resistor 130 is shown in a satin pattern.
  • the resistor 130 can be formed from, for example, a material containing Cr (chromium), a material containing Ni (nickel), or a material containing both Cr and Ni. That is, the resistor 130 can be formed from a material containing at least one of Cr and Ni. Examples of the material containing Cr include a Cr mixed phase film. Examples of the material containing Ni include Cu—Ni (copper nickel). Examples of the material containing both Cr and Ni include Ni—Cr (nickel chromium).
  • the Cr multiphase film, Cr, CrN, Cr 2 N or the like is film multiphase.
  • the Cr mixed phase film may contain unavoidable impurities such as chromium oxide.
  • the thickness of the resistor 130 is not particularly limited and can be appropriately selected depending on the intended purpose, but can be, for example, about 0.05 ⁇ m to 2 ⁇ m.
  • the thickness of the resistor 130 is 0.1 ⁇ m or more, the crystallinity of the crystals constituting the resistor 130 (for example, the crystallinity of ⁇ -Cr) is improved, and when it is 1 ⁇ m or less, the resistor is preferable. It is more preferable in that cracks in the film and warpage from the base material 110 due to the internal stress of the film constituting 130 can be reduced.
  • the stability of the gauge characteristics can be improved by using ⁇ -Cr (alpha chromium), which is a stable crystal phase, as a main component.
  • ⁇ -Cr alpha chromium
  • the gauge ratio of the strain gauge 100 is 10 or more, and the gauge coefficient temperature coefficient TCS and the resistance temperature coefficient TCR are within the range of ⁇ 1000 ppm / ° C. to + 1000 ppm / ° C. Can be.
  • the principal component means that the target substance occupies 50% by mass or more of all the substances constituting the resistor, but from the viewpoint of improving the gauge characteristics, the resistor 130 contains 80% by weight of ⁇ -Cr. It is preferable to include the above.
  • ⁇ -Cr is Cr of a bcc structure (body-centered cubic lattice structure).
  • Wiring 140 is connected to both ends of the resistor 130, and each wiring 140 is connected to a pair of terminal portions 150.
  • the terminal portion 150 is wider than the wiring 140 and is formed in a substantially rectangular shape.
  • the terminal portion 150 is a pair of electrodes for outputting a change in the resistance value of the resistor 130 caused by strain to the outside, and for example, a lead wire for external connection is joined.
  • the wiring 140 and the terminal portion 150 can be integrally formed of, for example, the same material as the resistor 130 in the same process as the resistor 130.
  • a conductor layer (for example, copper or the like) having a resistance lower than that of the resistor 130 may be provided on the upper surface of the terminal portion 150.
  • the upper surface of the terminal portion 150 may be coated with a metal (for example, copper, gold, etc.) having better solderability than the terminal portion 150.
  • a cover layer (insulating resin layer) may be provided on the upper surface 110a of the base material 110 so as to cover the resistor 130 and the wiring 140 and expose the terminal portion 150.
  • the cover layer may be provided so as to cover the entire portion excluding the terminal portion 150.
  • the cover layer can be formed of, for example, an insulating resin such as PI resin, epoxy resin, PEEK resin, PEN resin, PET resin, PPS resin, and composite resin (for example, silicone resin and polyolefin resin).
  • the cover layer may contain a filler or a pigment.
  • the thickness of the cover layer is not particularly limited and may be appropriately selected depending on the intended purpose, but can be, for example, about 2 ⁇ m to 30 ⁇ m.
  • the base material 110 is prepared, and the planar shape resistor 130, the wiring 140, and the terminal portion 150 shown in FIG. 18 are formed on the upper surface 110a of the base material 110.
  • the materials and thicknesses of the resistor 130, the wiring 140, and the terminal portion 150 are as described above.
  • the resistor 130, the wiring 140, and the terminal portion 150 can be integrally formed of the same material.
  • the resistor 130, the wiring 140, and the terminal portion 150 are formed by, for example, a magnetron sputtering method targeting a raw material capable of forming the resistor 130, the wiring 140, and the terminal portion 150, and are patterned by photolithography. Can be formed.
  • the resistor 130, the wiring 140, and the terminal portion 150 may be formed by a reactive sputtering method, a vapor deposition method, an arc ion plating method, a pulse laser deposition method, or the like, instead of the magnetron sputtering method.
  • the film thickness is 1 nm or more on the upper surface 110a of the base material 110 as a base layer, for example, by a conventional sputtering method. It is preferable to form a functional layer having a thickness of about 100 nm in a vacuum. After forming the resistor 130, the wiring 140, and the terminal portion 150 on the entire upper surface of the functional layer, the functional layer is patterned in the planar shape shown in FIG. 18 together with the resistor 130, the wiring 140, and the terminal portion 150 by photolithography. Will be done.
  • the functional layer refers to a layer having at least a function of promoting crystal growth of the resistor 130, which is an upper layer. It is preferable that the functional layer further has a function of preventing oxidation of the resistor 130 by oxygen and moisture contained in the base material 110 and a function of improving the adhesion between the base material 110 and the resistor 130.
  • the functional layer may further have other functions.
  • the insulating resin film constituting the base material 110 contains oxygen and water, especially when the resistor 130 contains Cr, Cr forms a self-oxidizing film, so that the functional layer has a function of preventing oxidation of the resistor 130. It is effective to prepare.
  • the material of the functional layer is not particularly limited as long as it has a function of promoting crystal growth of the resistor 130, which is at least the upper layer, and can be appropriately selected depending on the intended purpose.
  • Cr chromium
  • Ti Titanium
  • V vanadium
  • Nb niobium
  • Ta tantal
  • Ni nickel
  • Y ittrium
  • Zr zylonium
  • Hf hafnium
  • Si silicon
  • C carbon
  • Zn Zinc
  • Cu copper
  • Bi bismuth
  • Fe iron
  • Mo mo
  • W tungsten
  • Ru ruthenium
  • Rh Rh (rodium), Re (renium), Os (osmium), Ir
  • Examples include metals, alloys of any of the metals in
  • Examples of the above alloy include FeCr, TiAl, FeNi, NiCr, CrCu and the like.
  • Examples of the above-mentioned compounds include TiN, TaN, Si 3 N 4 , TiO 2 , Ta 2 O 5 , SiO 2, and the like.
  • the functional layer can be vacuum-deposited by a conventional sputtering method in which Ar (argon) gas is introduced into the chamber, targeting a raw material capable of forming the functional layer.
  • Ar argon
  • the functional layer is formed while etching the upper surface 110a of the base material 110 with Ar, so that the film forming amount of the functional layer can be minimized and the adhesion improving effect can be obtained.
  • the functional layer may be formed by another method.
  • the effect of improving adhesion is obtained by activating the upper surface 110a of the base material 110 by plasma treatment using Ar or the like before the film formation of the functional layer, and then the functional layer is vacuum-deposited by the magnetron sputtering method. You may use the method of
  • the combination of the material of the functional layer and the material of the resistor 130, the wiring 140, and the terminal portion 150 is not particularly limited and may be appropriately selected depending on the intended purpose.
  • Ti is used as the functional layer
  • the resistor 130 A Cr mixed-phase film containing ⁇ -Cr (alpha chromium) as a main component can be formed as the wiring 140 and the terminal portion 150.
  • the resistor 130, the wiring 140, and the terminal portion 150 can be formed by a magnetron sputtering method in which Ar gas is introduced into the chamber by targeting a raw material capable of forming a Cr mixed phase film.
  • Ar gas is introduced into the chamber by targeting a raw material capable of forming a Cr mixed phase film.
  • pure Cr may be targeted, an appropriate amount of nitrogen gas may be introduced into the chamber together with Ar gas, and the resistor 130, the wiring 140, and the terminal portion 150 may be formed by a reactive sputtering method.
  • the growth surface of the Cr mixed-phase film is defined by the functional layer made of Ti, and a Cr mixed-phase film containing ⁇ -Cr as a main component, which has a stable crystal structure, can be formed.
  • the gauge characteristics are improved by diffusing Ti constituting the functional layer into the Cr mixed phase film.
  • the gauge ratio of the strain gauge 100 can be 10 or more, and the gauge ratio temperature coefficient TCS and the resistance temperature coefficient TCR can be in the range of ⁇ 1000 ppm / ° C. to + 1000 ppm / ° C.
  • the Cr mixed phase film may contain Ti or TiN (titanium nitride).
  • the functional layer made of Ti has a function of promoting crystal growth of the resistor 130 and a function of preventing oxidation of the resistor 130 by oxygen or moisture contained in the base material 110. , And all the functions of improving the adhesion between the base material 110 and the resistor 130.
  • Ta, Si, Al, or Fe is used as the functional layer instead of Ti.
  • the functional layer under the resistor 130 By providing the functional layer under the resistor 130 in this way, the crystal growth of the resistor 130 can be promoted, and the resistor 130 having a stable crystal phase can be produced. As a result, the stability of the gauge characteristics of the strain gauge 100 can be improved. Further, the material constituting the functional layer diffuses into the resistor 130, so that the gauge characteristics of the strain gauge 100 can be improved.
  • a cover layer that covers the resistor 130 and the wiring 140 and exposes the terminal portion 150 is provided on the upper surface 110a of the base material 110 to distort the strain.
  • Gauge 100 is completed.
  • the cover layer is, for example, laminated on the upper surface 110a of the base material 110 with a thermosetting insulating resin film in a semi-cured state so as to cover the resistor 130 and the wiring 140 and expose the terminal portion 150, and heat and cure. Can be made.
  • the cover layer is formed by coating the upper surface 110a of the base material 110 with the resistor 130 and the wiring 140, applying a liquid or paste-like thermosetting insulating resin so as to expose the terminal portion 150, and heating to cure the cover layer. It may be produced.
  • the strain gauge 100 When the functional layer is provided on the upper surface 110a of the base material 110 as the base layer of the resistor 130, the wiring 140, and the terminal portion 150, the strain gauge 100 has the cross-sectional shape shown in FIG.
  • the layer indicated by reference numeral 120 is a functional layer.
  • the planar shape of the strain gauge 100 when the functional layer 120 is provided is the same as that in FIG.
  • the sensor 91 is arranged on the gas discharge side of the microblower 20 and has a function of acquiring gas information.
  • the sensor 91 is arranged on the gas discharge side of the protrusion 11 of the lower case 10 and acquires information on the gas discharged from the through hole 12A.
  • the diameter of the through hole 12A may be increased so that the sensor 91 is arranged in the through hole 12A. In this case, since the side surface of the sensor 91 is surrounded by the inner wall of the through hole 12A, the power of the sensor 91 can be improved. Further, two or more through holes may be provided for the sensor 91 to acquire gas information.
  • the sensor 91 is, for example, an odor sensor that detects the odor of gas as information on the gas discharged from the through hole 12A.
  • the odor sensor for example, a well-known sensor such as a semiconductor type or a crystal oscillator type can be used.
  • the sensor 91 may be a humidity sensor, a temperature sensor, or another sensor.
  • the wiring board 92 is a resin substrate such as a glass epoxy substrate, a silicon substrate, a ceramic substrate, or the like, on which a wiring pattern, a land for mounting components, or the like is formed.
  • the wiring board 92 is provided with a connector, a wire rod, or the like that inputs / outputs signals or the like to the outside of the gas suction / discharge device 1.
  • a circuit for driving the piezoelectric element 215a, an analog front end connected to the terminal portion 150 of the strain gauge 100, or the like may be mounted on the wiring board 92.
  • the analog front end may include, for example, a bridge circuit, an amplifier, an analog / digital conversion circuit (A / D conversion circuit), and the like.
  • the analog front end may include a temperature compensation circuit.
  • the gas suction / discharge device 1 uses the microblower 20 that drives the piezoelectric element to suck and discharge the gas, the size can be reduced as compared with the conventional pump that drives a motor or the like. As a result, the gas information acquisition device 3 whose main part is the gas suction / discharge device 1 can be miniaturized.
  • the gas suction / discharge device 1 has a filter unit 50 on the suction side, and the clogging of the filter 52 (gas suction amount) can be detected by the strain gauge 100. Further, the state of the tube 340 can be detected by the strain gauge 100. The state of the tube 340 is a crushed or bent tube 340, a closed hole, or the like.
  • the strain gauge 100 is loaded by the gas sucked by the microblower 20. As a result, the strain gauge 100 is deformed, and the resistance value of the resistor 130 of the strain gauge 100 changes. By measuring the change in the resistance value of the resistor 130 via the wiring 140 and the terminal portion 150, the clogging state of the filter 52 and the state of the tube 340 can be detected.
  • the strain gauge 100 can accurately detect clogging of the filter 52, crushing and bending of the tube 340, and the like based on the change in the resistance value of the resistor 130. For example, when the resistance value of the strain gauge 100 is equal to or less than a predetermined threshold value, it is possible to determine whether the filter 52 is clogged, the tube 340 is crushed, or bent. By monitoring the clogged state of the filter 52 and the crushing and bending of the tube 340, it is possible to constantly suck and discharge an appropriate gas, and it is possible to accurately detect the presence or absence of excrement.
  • the microblower 20 can be easily removed when the microblower 20 is replaced for maintenance or the like. be.
  • the microblower 20 uses the piezoelectric element 215a to move the gas, but since it is very delicate, the microblower 20 cannot obtain accurate operation when a load is applied to other than the outer peripheral portion. Therefore, in the gas suction / discharge device 1, the microblower 20 is fixed by inserting the microblower support 30, which is a low-load elastic body, into the recesses 23 provided in the outer peripheral portions (for example, the four corners) of the microblower 20. Is going. As a result, it is possible to reduce the possibility that the microblower 20 is stressed and affect the operation of the piezoelectric element 215a, and the microblower 20 can be operated accurately.
  • micro blower 20 is attached to the lower case 10 using double-sided tape, problems such as diagonal attachment or protrusion of the double-sided tape may occur at the time of attachment, and the performance may be destroyed when the micro blower 20 is replaced. Is not desirable because it is possible.
  • microblower support 30 once attached cannot be reused by fixing with double-sided tape or an adhesive, but the microblower support 30 is fixed by inserting the microblower support 30 which is a low-load elastic body into the recess 23. Can be reused.
  • a gas information acquisition device including a gas suction / discharge device having a plurality of micro blowers is shown.
  • the description of the same component as that of the above-described embodiment may be omitted.
  • FIG. 21 is a perspective view illustrating the gas suction / discharge device according to the first modification of the first embodiment.
  • FIG. 22 is a cross-sectional view illustrating the gas suction / discharge device according to the first embodiment, which is a longitudinal section obtained by cutting the strain gauge 100 into two in the longitudinal direction through the center of the gas suction / discharge device 1A. Shows a face.
  • the gas information acquisition device 3 may have a gas suction / discharge device 1A instead of the gas suction / discharge device 1.
  • the gas suction / discharge device 1A has a point having four microblowers 20 as a gas suction / discharge device 1 having one microblower 20 (see FIGS. 8, 9, etc.). It's different.
  • the gas suction / discharge device 1A includes a lower case 10, four microblowers 20, a microblower support 30, a filter support plate 40, a filter unit 50, an upper case 60, and three microblower cases 80. have.
  • 23 and 24 are perspective views illustrating a method of assembling the gas suction / discharge device according to the first modification of the first embodiment.
  • the same assembly as in FIG. 11 of the first embodiment is performed, and the first microblower 20 is arranged in the recess 13 of the lower case 10.
  • the micro blower case 80 is prepared, and as shown on the lower side of the arrow in FIG. 23, on the lower case 10 in which the first micro blower 20 is arranged in the recess 13.
  • the micro blower case 80 is arranged in the space.
  • the microblower case 80 is a substantially disk-shaped member formed of ABS resin or the like, except that a protrusion 11 is not formed and a through hole 82 is provided in place of the through holes 12A and 12B. It has the same structure as the lower case 10. However, the thickness of the micro blower case 80 may be thicker than that of the lower case 10.
  • a recess 83 for positioning the microblower 20 is formed on the upper surface side of the microblower case 80.
  • the recess 83 is provided in a substantially central portion on the upper surface side of the micro blower case 80, and is provided in the radial direction of the first portion 831 on which the main body 21 of the micro blower 20 is arranged and the upper surface side of the micro blower case 80. It includes a second portion 832 in which the external connection terminal 22 of the blower 20 is arranged.
  • the first part 831 and the second part 832 communicate with each other.
  • a through hole 82 is formed in a substantially central portion of the first portion 831 to serve as a flow path for discharging gas.
  • a substantially semicircular recess 84 communicating with the first portion 831 is formed from the three inner walls excluding the inner wall provided with the second portion 832 toward the outside. ing. Further, on the outer peripheral side of the microblower case 80, three through holes 85 into which screws for fixing the members are inserted are formed at substantially equal intervals.
  • the second microblower 20 is arranged in the recess 83 of the microblower case 80.
  • the main body 21 of the microblower 20 is arranged in the first portion 831 of the recess 83, and the external connection terminal 22 of the microblower 20 is arranged in the second portion 832 of the recess 83.
  • the depth of the recess 83 is formed to be approximately the same as the thickness of the microblower 20. Therefore, the upper surface of the microblower case 80 and the upper surface of the microblower 20 are substantially flush with each other.
  • the microblower support 30 is inserted into the recess 23 on the outer peripheral portion of the microblower 20.
  • the microblower support 30 is not bonded or the like, and is only inserted into the recess 23.
  • One end of each microblower support 30 projects from the upper surface of the microblower 20.
  • the tip side of the external connection terminal 22 of the microblower 20 protrudes from the side surface of the microblower case 80 to electrically connect the piezoelectric element 215a constituting the microblower 20 and the circuit provided outside the gas suction / discharge device 1A. Make it possible.
  • the three semicircular recesses 84 located on the outside of the microblower 20 are provided so that the microblower 20 can be easily removed when the microblower 20 is replaced for maintenance or the like. That is, since each recess 84 exposes a part of the side surface of the micro blower 20, the side surface of the micro blower 20 can be pinched and easily removed.
  • the recess 84 may have a shape other than a semicircle as long as the side surface of the microblower 20 can be pinched.
  • the second microblower case 80 is arranged on the first microblower case 80 in which the second microblower 20 is arranged in the recess 83. Then, in the same manner as in FIG. 24, the third microblower 20 is arranged in the recess 83 of the second microblower case 80.
  • the third microblower case 80 is arranged on the second microblower case 80 in which the third microblower 20 is arranged in the recess 83. Then, in the same manner as in FIG. 24, the fourth microblower 20 is arranged in the recess 83 of the third microblower case 80.
  • the filter support plate 40 and the filter unit are placed on the third microblower case 80 in which the fourth microblower 20 is arranged in the recess 83.
  • 50 and the upper case 60 are arranged in order and fixed with screws 70.
  • the gas suction / discharge device 1A is completed.
  • each microblower 20 it is preferable to fill the gap formed in the vicinity of the external connection terminal 22 of each microblower 20 with an adhesive or the like. This is to prevent the gas inside the gas suction / discharge device 1A from leaking to the outside and to prevent dust or the like from entering the inside of the gas suction / discharge device 1A.
  • the number of microblowers 20 is increased, so that the suction / discharge force is improved.
  • four microblowers 20 are arranged in series in the same gas suction direction and discharge direction, but the number of microblowers 20 may be two, three, five or more. do not have.
  • the suction / discharge force can be improved. Therefore, when the gas suction / discharge device 1A is used for the gas information acquisition device 3, the number of microblowers 20 may be selected so as to satisfy the suction / discharge force required for the gas information acquisition device 3.
  • the suction and discharge force is improved by using the gas suction and discharge device 1A instead of the gas suction and discharge device 1, so that the number of gas suction and discharge devices 1A included in the gas information acquisition device 3 can be reduced. Therefore, the gas information acquisition device 3 can be miniaturized. For example, in FIG. 2, the gas information acquisition device 3 has six gas suction / discharge devices 1, but when the gas suction / discharge device 1A is used, the number can be five or less.
  • the filter unit 50 is arranged on the gas suction side of any of the microblowers 20, so that dust, dust, etc. can be collected from the gas suction / discharge device 1A. It is possible to prevent it from getting inside the gas.
  • the strain gauge 100 can detect a clogged state of the filter 52, a crushed or bent state of the tube 340, and the like. By monitoring the clogged state of the filter 52 and the crushing and bending of the tube 340, it is possible to constantly suck and discharge the appropriate gas.
  • the microblower 20 is replaced when the microblower 20 is replaced for maintenance or the like. 20 is easy to remove.
  • the microblower 20 is fixed, and the microblower support 30, which is a low-load elastic body, is provided in the recess 23 provided on the outer peripheral portion of the microblower 20. It is done by inserting. This enables accurate operation of the microblower 20.
  • the microblower support 30 when fixing the double-sided tape or adhesive, the microblower support 30 once attached cannot be reused, but the microblower support 30 is fixed by inserting the microblower support 30 which is a low-load elastic body into the recess 23. Can be reused.
  • FIG. 25 is a perspective view (No. 1) of the gas suction port according to the second modification of the first embodiment.
  • FIG. 26 is a cross-sectional view (No. 1) of the gas suction port according to the second modification of the first embodiment.
  • FIG. 27 is an exploded perspective view of the gas suction port according to the second modification of the first embodiment.
  • the gas information acquisition device 3 may have a gas suction port 360A instead of the gas suction port 360.
  • the gas suction port 360A is different from the gas suction port 360 (see FIG. 6 and the like) in that the filter unit 50, the packing 365, and the cap 366 are added.
  • a recess 362x for positioning the filter unit 50 is formed around the suction path 364 of the plate-shaped portion 362.
  • the recess 362x is provided in an annular shape along the outer circumference of the suction path 364, and the filter unit 50 is arranged.
  • the packing 365 is arranged on the filter unit 50 as needed, and the cap 366 is fixed to the plate-shaped portion 362.
  • each claw 366x is hooked and fixed to three recesses 362y provided on the side wall of the plate-shaped portion 362. It is preferable that the cap 366 is provided with a plurality of slits 366y so that the cap 366 is easily deformed during attachment and detachment.
  • the filter unit 50 is only positioned in the recess 362x of the plate-shaped portion 362, and is not fixed with an adhesive or the like. That is, since the filter unit 50 is held by the plate-shaped portion 362, which is a filter holding member, in a detachable state, it can be easily replaced by removing the cap 366.
  • the gas suction port may have a built-in filter in a detachable state.
  • the gas suction / discharge device can be miniaturized. Due to the miniaturization of the gas suction / discharge device, it is less likely to be bothered even if the case in which the gas suction / discharge device is placed is installed on the side wall of the bed or on the bed.
  • the work of disassembling the gas suction / discharge device is eliminated, and only the work of removing the cap 366 is required, so that the filter unit can be easily replaced and maintainability is improved.
  • the filter unit is placed at the position closest to the gas suction side, it is possible to prevent not only the gas suction / discharge device but also the tube from becoming dirty. As a result, there is almost no need to replace the tube.
  • FIG. 28 is a cross-sectional view (No. 2) of the gas suction port according to the second modification of the first embodiment.
  • the gas information acquisition device 3 may have a gas suction port 360B instead of the gas suction port 360.
  • the gas suction port 360B is provided with a recess 361x on the side of the gas suction port 360A facing the plate-shaped portion 362 of the suction path 364 of the flow path direction conversion unit 361 extending in a substantially vertical direction. It is a structure.
  • the recess 361x is a liquid pool that collects water and / or water droplets (for example, urine) contained in the sucked gas.
  • the gas containing water or water droplets passes through the tube 340 and passes through the gas suction / discharge device 1 to the sensor 91. To reach. If water or water droplets adhere to the gas suction / discharge device 1, problems such as destruction will occur. In addition, the tube 340 becomes unsanitary due to the adhesion of dirty water into the tube 340. Such a problem can be suppressed by providing the flow path direction changing unit 361 with a recess 361x for collecting water and water droplets contained in the sucked gas.
  • FIG. 29 is a cross-sectional view (No. 3) of the gas suction port according to the second modification of the first embodiment.
  • the liquid pool portion may have a structure in which another member 367 provided with the recess 367x is fixed to the flow path direction changing portion 361 by adhesion or the like.
  • gas suction port 360A, 360B, or 360C By using the gas suction port 360A, 360B, or 360C in this way, it is possible to prevent the tube 340 and the gas suction / discharge device 1 from becoming dirty, so that the gas information acquisition device 3 can be used hygienically and with peace of mind. Further, by using the gas suction port 360A, 360B, or 360C, maintenance is easy and the excrement of the user can be reliably detected at all times.
  • FIG. 30 is a perspective view (No. 2) of the gas suction port according to the second modification of the first embodiment.
  • the gas information acquisition device 3 may have a gas suction port 360D instead of the gas suction port 360.
  • the portion of the plate-shaped portion 362 may be replaced with the box-shaped portion 368. Since the tip surface 368a (upper surface) of the box-shaped portion 368 is flat, it can be easily contacted with the lower surface of the sheets 820 as in the case of FIG. 7. As a result, the end of the suction path 364 provided in the box-shaped portion 368 surely faces the sheets 820 side, so that the gas on the sheets 820 side can be reliably sucked.
  • a rectangular cap may be provided on the tip surface 368a side of the box-shaped portion 368 to incorporate the filter unit.
  • FIG. 31 is a perspective view (No. 3) of the gas suction port according to the second modification of the first embodiment.
  • FIG. 32 is a perspective view showing a state in which the tube is inserted into the gas suction port 360E.
  • FIG. 33 is a cross-sectional view showing a state in which the tube is inserted into the gas suction port 360E.
  • the gas information acquisition device 3 may have a gas suction port 360E instead of the gas suction port 360.
  • the gas suction port 360E is a structure in which the lower member 369a and the upper member 369b are joined.
  • the lower member 369a and the upper member 369b may be integrally formed.
  • the plane shape of the lower member 369a and the upper member 369b is circular, and the outer peripheral side of the upper surface of the upper member 369b is R-shaped.
  • the upper member 369b is provided with a suction path 364 in the vertical direction. Further, the lower member 369a and the upper member 369b are provided with an insertion hole 369x into which the tube 340 is inserted in the horizontal direction. The suction path 364 and the insertion hole 369x communicate with each other. When the tube 340 is inserted into the insertion hole 369x, the cavity of the tube 340 and the suction path 364 communicate with each other.
  • the lower member 369a and the upper member 369b are flow path direction changing portions that bend the direction of the suction path 364 with respect to the direction in which the cavity of the tube 340 extends.
  • the cushion 830 is formed of a cushioning member such as urethane and is easily deformed. Therefore, even if the tube 340 is arranged on the lower surface side of the cushion 830, the tube 340 is crushed. There is no.
  • FIG. 34 is a partial plan view schematically showing a bed in which the gas information acquisition device according to the second embodiment is arranged.
  • a mattress 810 is laid on the bed 800, and a cushion 830 having a cushioning property in which six tubes 340 are fixed in advance using tube fixing parts 370 are arranged on the mattress 810. ..
  • Each tube 340 is provided with one through hole 341 that serves as a suction port for sucking air in the vicinity of the sheets 820, and the tip portion is closed.
  • Each tube 340 is fixed with a tube fixing part 370 so that the through hole 341 faces upward (the side covered with the sheets 820).
  • the sheets 820 are laid on the cushion 830 so as to cover the tube 340 in the same manner as in FIGS. 1 and 7, but FIG. 34 shows the state before the sheets 820 are laid.
  • FIG. 35 is a partially enlarged perspective view of the vicinity of the case of the gas information acquisition device according to the second embodiment.
  • the gas information acquisition device 3A mainly includes a gas suction / discharge device 1A, a case 300, and a tube 340.
  • the gas information acquisition device 3A is a gas suction / discharge device 1A arranged in the case 300 that sucks the gas in the measurement region through the tube 340 and sucks the sucked gas into the gas suction / discharge device. It is a device that discharges gas toward the sensor 91 possessed by 1A and acquires gas information (odor, humidity, etc.) with the sensor 91.
  • the bed 800, the mattress 810, and the sheets 820 are not components of the gas information acquisition device 3A.
  • the gas to be detected is air.
  • the length in the arrow L direction is reduced to about half as compared with the gas information acquisition device 3 (see FIG. 2 and the like) in which the six gas suction / discharge devices 1 are arranged in the case 300.
  • the reason why it is sufficient to arrange three gas suction / discharge devices 1A in the case 300 instead of six is that the six tubes 340 are combined into three using the three tube connecting parts 380. Because it is.
  • the tube connecting component 380 connects a plurality of tubes 340 arranged in the measurement area, and the number of tubes 340 connected to the gas suction / discharge device 1A is larger than the number of tubes 340 arranged in the measurement area. It is a connecting part to reduce.
  • the tube connecting component 380 has three connecting portions 381, 382, and 383. Similar to the connection portion 363 (see FIG. 6 and the like), a step-like step whose maximum diameter increases as the distance from the tip side increases is formed on the outer peripheral side of the connection portions 381, 382, and 383.
  • the tube connecting component 380 is not limited to a structure having three connecting portions, and may have a structure having four or more connecting portions, if necessary.
  • a tube 340 is press-fitted into the connecting portions 381, 382, and 383, and a step-like step is formed on the outer peripheral side of the connecting portions 381, 382, and 383 in which the maximum diameter increases as the distance from the tip side increases. Therefore, it is possible to connect a plurality of tubes 340 having an inner diameter.
  • the gas suction / discharge device 1A uses the microblower 20 that drives the piezoelectric element to suck and discharge the gas, the size can be reduced as compared with the conventional pump that drives a motor or the like. As a result, the gas information acquisition device 3A whose main part is the gas suction / discharge device 1A can be miniaturized.
  • the gas information acquisition device 3A can be further miniaturized. That is, since the case 300 of the gas information acquisition device 3A installed near the side wall of the bed 800 to be used and the mattress 810 to be used is configured to be small, the excrement of the user can be collected without getting in the way. It becomes detectable.
  • FIG. 37 is a partial plan view schematically showing a bed in which the gas information acquisition device according to the first modification of the second embodiment is arranged.
  • a cushion 830 having a cushioning property in which four tubes 340 are fixed in advance by using a tube fixing component 370, is arranged at a predetermined position.
  • the four tubes 340 are combined into two using two tube connecting parts 380, and further combined into one using one tube connecting component 380. That is, the number of tubes 340 connected to the gas suction / discharge device 1A is one.
  • FIG. 38 is a partially enlarged perspective view of the vicinity of the case of the gas information acquisition device according to the first modification of the second embodiment.
  • the gas information acquisition device 3B in the gas information acquisition device 3B, one gas suction / discharge device 1A is arranged in the case 300. Therefore, the length in the arrow L direction is reduced to about 1/3 of that of the gas information acquisition device 3A (see FIG. 35 and the like) in which the three gas suction / discharge devices 1A are arranged in the case 300.
  • the number of tubes 340 in the portion where the through holes 341 are arranged can be any number as necessary (in consideration of the physique and body movement of the bed user). Further, the number of tubes 340 to be finally combined can be appropriately determined by using the tube connecting component 380, but by using one tube 340 connected to the gas suction / discharge device 1A, the gas information acquisition device 3B can be used. As described above, the case 300 accommodating the gas suction / discharge device 1A can be significantly reduced in size.
  • the number of microblowers 20 connected in series in the gas suction / discharge device 1A is increased. It can be dealt with. In this case, since the microblower 20 is originally small, it has almost no effect on the overall size of the case 300.
  • ⁇ Modification 2 of the second embodiment> an example of a gas information acquisition device in which a gas suction / discharge device is integrated with a deodorizing unit or the like is shown.
  • the description of the same component as that of the above-described embodiment may be omitted.
  • FIG. 39 is a perspective view illustrating the gas information acquisition device according to the second embodiment.
  • the illustration of the upper lid of the housing 400 is omitted.
  • the gas information acquisition device 3C mainly includes a gas suction / discharge device 1A, a housing 400, a deodorizing unit 410, and a circuit board 420.
  • the gas suction / discharge device 1A, the deodorizing unit 410, and the circuit board 420 are housed in the same housing 400.
  • the housing 400 is made of, for example, a resin or a metal plate.
  • the size of the housing 400 can be, for example, about 180 mm in length ⁇ 90 mm in width ⁇ 50 mm in height. However, by downsizing the circuit board 420, it is possible to reduce the size to about 1/3 in the vertical direction and about 1/2 in the height direction.
  • the housing 400 is provided with a through hole 400x for discharging gas to the outside.
  • the sensor 91 is an odor sensor.
  • the deodorizing unit 410 is provided to eliminate the odor of the gas sucked by the gas suction / discharging device 1A via the tube 340 and discharged to the sensor 91 side.
  • the deodorizing unit 410 for example, activated carbon that adsorbs / absorbs and removes an unpleasant odor, a bio-deodorant for biological treatment, a deodorant (fragrance) that changes an unpleasant odor into a gentle odor, or the like is used. be able to.
  • the biological treatment is a treatment in which microorganisms take in malodorous substances and malodorous components, which are the sources of odors, oxidatively decompose them, and convert them into energy in order to survive.
  • the circuit board 420 may be provided with, for example, a power supply circuit for supplying the microblower 20, a circuit connected to the sensor 91, a circuit for detecting the presence or absence of excrement, and a circuit for transferring the result to the outside. .. Further, a connector 430 is mounted on the circuit board 420 to enable electrical connection with the outside. The connector 430 may be arranged on the side opposite to the side to which the tube 340 is connected.
  • the gas suction / discharge device 1A becomes one and there is a space. .. Therefore, the gas suction / discharge device 1A can be integrated with the deodorizing unit 410, the circuit board 420, and the like and housed in the housing 400.
  • the deodorizing unit 410 By arranging the deodorizing unit 410 in the housing 400, even if the gas discharged by the gas suction / discharging device 1A has an offensive odor (bad odor), the deodorizing unit 410 deodorizes the gas and then passes through the through hole 400x. Can be released to the outside.
  • the room in which the gas information acquisition device 3C is installed can be made into a comfortable environment without offensive odor (bad odor). Further, since there is no offensive odor (bad odor) associated with the gas discharge of the gas information acquisition device 3C in the room, the sensor 91 can detect the odor that should be originally detected, and can prevent erroneous detection.
  • first embodiment and its modified example and the second embodiment and its modified example can be appropriately combined.
  • a plurality of tubes 340 may be connected by using the tube connecting component 380 to reduce the number of tubes 340 connected to the gas suction / discharge device 1 and the like.
  • the gas suction port 360 or the like may be attached to the end of the tube 340 on the side not connected to the gas suction / discharge device 1A or the like.
  • the through hole 341 is not provided.
  • the measurement area is set on the bed, but the measurement area is not limited to the bed, and the monitored person (care recipient, patient). Etc.) should be on the bedding on which the bed can lie. Bedding is, for example, beds, duvets, mattresses, cushioning materials, and the like.
  • a pressure gauge may be used instead of the strain gauge to detect the clogged state of the filter and the state of the tube.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Mechanical Engineering (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nursing (AREA)
  • Epidemiology (AREA)
  • General Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Urology & Nephrology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Reciprocating Pumps (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

L'invention concerne un dispositif d'acquisition d'informations de gaz comprenant un dispositif d'aspiration et d'évacuation de gaz pourvu d'une micro-soufflante qui entraîne un élément piézoélectrique pour effectuer une aspiration et une évacuation de gaz, et un capteur qui est disposé sur le côté évacuation de gaz de la micro-soufflante et qui acquiert des informations concernant le gaz, un élément tubulaire qui est relié au côté aspiration du dispositif d'aspiration et d'évacuation de gaz et qui s'étend jusqu'à une région dans laquelle les informations relatives au gaz sont mesurées et un orifice d'aspiration de gaz qui est fixé à la partie d'extrémité de l'élément tubulaire qui n'est pas reliée au dispositif d'aspiration et d'évacuation de gaz, l'élément tubulaire étant pourvu d'une cavité servant de partie d'un passage d'écoulement pour le gaz ; et l'orifice d'aspiration de gaz est pourvu d'un passage d'entrée d'aspiration qui communique avec la cavité et une partie de conversion de direction de passage d'écoulement qui amène la direction du passage d'entrée d'aspiration à se courber par rapport à la direction dans laquelle s'étend la cavité.
PCT/JP2021/000655 2020-01-23 2021-01-12 Dispositif d'acquisition d'informations de gaz WO2021149533A1 (fr)

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JP2020-009249 2020-01-23
JP2020009249A JP7491701B2 (ja) 2020-01-23 2020-01-23 気体情報取得装置

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263763A (ja) * 1992-03-19 1993-10-12 Hitachi Ltd 圧電ポンプおよびその運転方法
JP2005061836A (ja) * 2003-08-11 2005-03-10 Toyoe Moriizumi 悪臭源検出排除方法及び悪臭源検出排除装置
JP2014033745A (ja) * 2012-08-07 2014-02-24 Hitoshi Mifuji 排泄検出センサ及び排泄検出装置
US20140221962A1 (en) * 2013-02-07 2014-08-07 Hill-Rom Services, Inc. Dynamic Therapy Delivery System
JP2017062221A (ja) * 2015-01-30 2017-03-30 Toto株式会社 生体情報測定システム
JP2018173967A (ja) * 2018-06-11 2018-11-08 ホーチキ株式会社 煙検知装置
JP2019045497A (ja) * 2017-08-31 2019-03-22 研能科技股▲ふん▼有限公司 アクチュエータセンサモジュール
JP2019178890A (ja) * 2018-03-30 2019-10-17 パラマウントベッド株式会社 排泄センサ
JP2019181067A (ja) * 2018-04-17 2019-10-24 パラマウントベッド株式会社 制御装置及び電動家具

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002153546A (ja) * 2000-11-20 2002-05-28 Matsushita Electric Ind Co Ltd 脱臭装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263763A (ja) * 1992-03-19 1993-10-12 Hitachi Ltd 圧電ポンプおよびその運転方法
JP2005061836A (ja) * 2003-08-11 2005-03-10 Toyoe Moriizumi 悪臭源検出排除方法及び悪臭源検出排除装置
JP2014033745A (ja) * 2012-08-07 2014-02-24 Hitoshi Mifuji 排泄検出センサ及び排泄検出装置
US20140221962A1 (en) * 2013-02-07 2014-08-07 Hill-Rom Services, Inc. Dynamic Therapy Delivery System
JP2017062221A (ja) * 2015-01-30 2017-03-30 Toto株式会社 生体情報測定システム
JP2019045497A (ja) * 2017-08-31 2019-03-22 研能科技股▲ふん▼有限公司 アクチュエータセンサモジュール
JP2019178890A (ja) * 2018-03-30 2019-10-17 パラマウントベッド株式会社 排泄センサ
JP2019181067A (ja) * 2018-04-17 2019-10-24 パラマウントベッド株式会社 制御装置及び電動家具
JP2018173967A (ja) * 2018-06-11 2018-11-08 ホーチキ株式会社 煙検知装置

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