WO2017086075A1 - 酸素濃縮装置 - Google Patents

酸素濃縮装置 Download PDF

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Publication number
WO2017086075A1
WO2017086075A1 PCT/JP2016/080834 JP2016080834W WO2017086075A1 WO 2017086075 A1 WO2017086075 A1 WO 2017086075A1 JP 2016080834 W JP2016080834 W JP 2016080834W WO 2017086075 A1 WO2017086075 A1 WO 2017086075A1
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Prior art keywords
oxygen
receiving element
flow path
light receiving
light
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PCT/JP2016/080834
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English (en)
French (fr)
Inventor
啓太 近藤
Original Assignee
ダイキン工業株式会社
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Publication date
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to CN201680066618.5A priority Critical patent/CN108290022B/zh
Priority to US15/776,358 priority patent/US10912905B2/en
Publication of WO2017086075A1 publication Critical patent/WO2017086075A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • A61M16/101—Preparation of respiratory gases or vapours with O2 features or with parameter measurement using an oxygen concentrator
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0875—Connecting tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A61M16/0666—Nasal cannulas or tubing
    • A61M16/0672—Nasal cannula assemblies for oxygen therapy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/276—General characteristics of the apparatus preventing use preventing unwanted use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3306—Optical measuring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3334—Measuring or controlling the flow rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/12—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4533—Gas separation or purification devices adapted for specific applications for medical purposes
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/187—Machine fault alarms

Definitions

  • the present invention relates to an oxygen concentrator for supplying oxygen from an apparatus main body to an oxygen discharger.
  • Patent Document 1 describes an adsorption-type oxygen concentrator that generates oxygen-enriched gas by adsorbing nitrogen in the air.
  • the power switch when the ambient temperature of the cannula becomes extremely high due to a fire or the like, when stopping the discharge of oxygen from the outlet of the cannula mounting part, the power switch is operated to operate the power source of the oxygen concentrator. It is conceivable to stop.
  • Patent Document 1 has a problem in that the discharge of oxygen cannot be stopped properly when the user is not aware of the fire.
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide an oxygen concentrator capable of reliably detecting a fire occurring in a cannula.
  • An oxygen concentrator is In an oxygen concentrator having an oxygen source, A mounting member to which the oxygen discharger is attached when oxygen from the oxygen supply source is supplied to the oxygen discharger; Inside the oxygen concentrator, a light receiving element disposed on an extension line of an oxygen supply flow path of the mounting member; Equipped with.
  • the light receiving element is arranged on the extension line of the oxygen supply flow path of the mounting member inside the oxygen concentrator. That is, the light receiving element is located upstream of the attachment member in the oxygen flow direction. Therefore, the smoke generated by the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame is surely blocked. Can be detected. Thereby, supply of oxygen can be stopped appropriately. Further, by providing the light receiving element on the extension line of the oxygen supply channel, the light receiving element can reliably detect the flame without blocking the light emitted by the oxygen supply channel.
  • the oxygen concentrator according to the second invention is When the light receiving element detects a flame generated in the oxygen discharger, the supply of oxygen is stopped.
  • the supply of oxygen is appropriately stopped when the light receiving element detects a flame generated in the oxygen discharger.
  • An oxygen concentrator is An opaque transmission window that transmits light is provided between the oxygen supply channel and the light receiving element,
  • the light receiving element that detects light through the transmission window is an optical sensor that can detect an infrared region.
  • a visible light sensor that receives only visible light is used by providing an opaque transmission window that shields visible light and using a light sensor such as a photodiode that can detect even the infrared region as a light receiving element. Compared with the case where there was, the influence by disturbance lights, such as sunlight and illumination light, can be suppressed, and a false detection can be prevented. Further, by providing a transmission window between the oxygen supply channel and the light receiving element, it is possible to prevent impurities such as dust from adhering to the light receiving element.
  • An oxygen concentrator according to a fourth invention is
  • the attachment member is made of metal and has a temperature sensor.
  • the mounting member is made of metal with good thermal conductivity, and by providing a temperature sensor, it is possible to reliably detect flame with heat in addition to the light receiving element.
  • An oxygen concentrator according to a fifth invention is
  • the oxygen supply channel has a bent portion bent at a right angle;
  • An opaque transmission window that is disposed between the oxygen supply channel and the light receiving element and transmits light is provided in the bent portion.
  • This oxygen concentrator can be arranged compactly by bending the oxygen supply channel at a right angle.
  • An oxygen concentrator according to a sixth invention is
  • the oxygen supply channel has at least a first channel formed in the attachment member;
  • the light receiving element is disposed on the upstream side in the flow direction of oxygen flowing through the first flow path.
  • a light receiving element is arranged on the upstream side in the flow direction of oxygen flowing through the first flow path. Smoke due to the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame can be detected reliably. .
  • An oxygen concentrator is A connecting member connected to the mounting member;
  • the oxygen supply channel includes at least the first channel and a second channel formed in the connecting member in a linear communication with the first channel;
  • the light receiving element is arranged on the upstream side in the flow direction of oxygen flowing in order through the second flow path and the first flow path.
  • a light receiving element was arranged upstream in the flow direction of oxygen flowing in order through the second flow path and the first flow path. Smoke due to the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame can be detected reliably. .
  • the light receiving element is disposed on the extension line of the oxygen supply flow path of the mounting member inside the oxygen concentrator. That is, the light receiving element is located upstream of the attachment member in the oxygen flow direction. Therefore, the smoke generated by the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame is surely blocked. Can be detected. Further, by providing the light receiving element on the extension line of the oxygen supply channel, the light receiving element can reliably detect the flame without blocking the light emitted by the oxygen supply channel.
  • the supply of oxygen is appropriately stopped when the light receiving element detects the flame generated in the oxygen discharger.
  • a visible light sensor that receives only visible light is used by providing an opaque transmission window that shields visible light and using a light sensor such as a photodiode that can detect the infrared region as a light receiving element. Compared with the case where there was, the influence by disturbance lights, such as sunlight and illumination light, can be suppressed, and a false detection can be prevented. Further, by providing a transmission window between the oxygen supply channel and the light receiving element, it is possible to prevent impurities such as dust from adhering to the light receiving element.
  • the mounting member is made of a metal having good thermal conductivity, and the temperature sensor is provided, so that the flame can be reliably detected by heat in addition to the light receiving element.
  • the oxygen supply channel can be arranged in a compact manner by bending it at a right angle.
  • the light receiving element is arranged on the upstream side in the flow direction of oxygen flowing through the first flow path. Smoke due to the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame can be detected reliably. .
  • the light receiving element is arranged on the upstream side in the flow direction of oxygen flowing in order through the second flow path and the first flow path.
  • Smoke due to the flame generated in the oxygen discharger flows downstream in the oxygen flow direction, so that the light detected by the light receiving element on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame can be detected reliably. .
  • FIG. 1 is a schematic view of an oxygen concentrator according to an embodiment of the present invention.
  • the front view of the oxygen concentrator of FIG. FIG. 3 is a sectional view taken along line AA in FIG. 2.
  • A) is a side view of an attachment member
  • (b) is sectional drawing of (a).
  • A) is the perspective view which looked at the connection member from back
  • (b) is CC sectional view taken on the line of (a).
  • A) is the figure which looked at the fixed board from the front
  • (b) is the side view of (a).
  • FIG. 3 is a sectional view taken along line BB in FIG. 2.
  • the oxygen concentrator 10 of this embodiment is connected to a cannula (oxygenator) 68 used by a patient receiving oxygen inhalation therapy to aspirate oxygen from the nose, and oxygen is supplied to the cannula 68. Supply.
  • the oxygen concentrator 10 may be connected to an oxygen discharge device other than the cannula.
  • the oxygen concentrating device 10 includes a device main body 11 and an oxygen supply unit 20 disposed in the device main body 11.
  • the apparatus main body 11 is formed with an air suction port 13 and an exhaust port 12.
  • the apparatus main body 11 includes an oxygen generation unit (oxygen supply source) 14 that generates oxygen-enriched gas, and an intermediate flow path 15 that connects the oxygen generation unit 14 and the oxygen supply unit 20.
  • the oxygen generation unit 14 of the present embodiment generates oxygen-enriched gas by using an adsorbent such as zeolite that adsorbs nitrogen under high pressure and releases nitrogen adsorbed under low pressure. That is, the oxygen generation unit 14 compresses the air taken from the outside through the air suction port 13 and the air suction flow path 17 and adsorbs nitrogen in the compressed air to generate an oxygen-enriched gas. The nitrogen released from the adsorbent under low pressure is discharged to the outside through the exhaust passage 16 and the exhaust port 12. On the other hand, the oxygen-enriched gas generated by the oxygen generation unit 14 is discharged from the oxygen supply unit 20 via the intermediate flow path 15. In FIG. 1, the direction in which the air inlet 13 is disposed with the oxygen generation unit 14 in between is the front, and the direction in which the exhaust 12 is disposed is the rear.
  • an adsorbent such as zeolite that adsorbs nitrogen under high pressure and releases nitrogen adsorbed under low pressure. That is, the oxygen generation unit 14 compresses the air taken from the
  • the oxygen supply unit 20 is provided on the upper front surface of the apparatus main body 11. As shown in FIGS. 3 to 6, the oxygen supply unit 20 includes an attachment member 22, a connection member 30, and an optical sensor 61 that can detect an infrared region that is a light receiving element, and a fixed plate 60.
  • the attachment member 22 is a cylindrical nozzle extending in the axial direction, and a first flow that constitutes a part of an oxygen supply flow path 53 to be described later.
  • a path 23 is formed.
  • the attachment member 22 is made of a metal having good thermal conductivity, and is installed in the apparatus main body 11 in the horizontal direction. As shown in FIG. 3, in a state where the attachment member 22 is mounted on the apparatus main body 11, the attachment member 22 is supported by the exterior cover 18 that covers the internal components.
  • a cannula 68 is connected to one front end 24 of the attachment member 22, and a connection member 30 is connected to the other rear end 25 via an O-ring 26.
  • a thermistor (temperature sensor) 27 for detecting the temperature of the attachment member 22 is disposed over the connection member 30 on the outer periphery of the rear side end portion 25.
  • connection member 30 is made of resin, and includes a substrate 31, a pair of support legs 35, a sensor fixing portion 40, and an intermediate flow path connection portion 50.
  • the substrate 31 has a rectangular shape in which both ends are formed in a semicircular shape. As shown in FIG. 5B, a circular cross-sectional through-hole 32 that penetrates the substrate 31 in the thickness direction is formed in the central portion of the substrate 31 in the longitudinal direction.
  • the support leg 35 has a cylindrical shape that rises vertically from the substrate 31 and extends rearward.
  • the sensor fixing unit 40 is disposed between the pair of support legs 35.
  • the sensor fixing portion 40 is a substantially rectangular column that rises vertically from the central portion in the longitudinal direction of the substrate 31 and extends rearward similarly to the support legs 35.
  • a concave portion 42 having a circular cross section is formed on the end surface 41 of the sensor fixing portion 40.
  • a second flow path 43 having a circular cross section is formed inside the sensor fixing portion 40. The diameter of the second flow path 43 is smaller than the diameter of the through hole 32 and communicates with the through hole 32 through the stepped portion 44.
  • the standing wall 46 between the recess 42 and the second flow path 43 is configured as an opaque transmission window 46 of the optical sensor 61 disposed in the recess 42 as will be described later.
  • the intermediate flow path connection part 50 is a cylindrical nozzle that rises vertically from the outer wall 47 of the sensor fixing part 40.
  • the axial direction of the intermediate flow path connecting portion 50 is orthogonal to the axial directions of the support leg 35 and the sensor fixing portion 40 and is orthogonal to the longitudinal direction of the substrate 31.
  • the third flow path 51 formed inside the intermediate flow path connection portion 50 communicates with the second flow path 43.
  • a bent portion 52 that is bent at a right angle is formed between a second flow path 43 and a third flow path 51 that constitute an oxygen supply flow path 53 described later.
  • the axial center L1 of the third flow path 51 is orthogonal to the through-hole 32 and the axial center L2 of the second flow path 43.
  • a recess 42 is formed on the extension line of the through hole 32 and the axis L ⁇ b> 2 of the second flow path 43 and in the bent portion 52.
  • the connection member 30 In the state where the connection member 30 is attached to the apparatus main body 11, the rear side end portion 25 of the attachment member 22 is fitted into the through hole 32 as shown in FIG. 3. Thereby, the 1st flow path 23 and the 2nd flow path 43 are connected.
  • the third flow path 51 and the intermediate flow path 15 communicate with each other by connecting the intermediate flow path 15 to the intermediate flow path connection portion 50.
  • the first flow path 23, the second flow path 43, and the third flow path 51 constitute an oxygen supply flow path 53.
  • the oxygen supply channel 53 is bent at a right angle by a bent portion 52 formed between the second channel 43 and the third channel 51.
  • an optical sensor 61 is disposed between the recess 42 and the fixed plate 60.
  • the optical sensor 61 is disposed on an extension line of the first flow path 23 and the second flow path 43 inside the oxygen concentrator 10.
  • the optical sensor 61 detects light propagating through the oxygen supply channel 53 through the transmission window 46 when a fire occurs in the cannula 68.
  • the transmission window 46 is opaque but transmits light, and is provided between the second flow path 43 and the optical sensor 61.
  • the fixing plate 60 has a rectangular shape, and is provided with a sensor arrangement portion 62 and a notch portion 63.
  • the sensor arrangement part 62 is provided in the center part of the fixed plate 60, and the optical sensor 61 is provided.
  • the notch 63 is formed on the side end surface of the fixed plate, and is curved toward the sensor arrangement portion 62.
  • FIG. 7 when the fixing plate 60 is mounted on the apparatus main body 11, the peripheral edge of the notch 63 is fixed to the tip of the support leg 35 with a screw. Accordingly, the optical sensor 61 can be disposed and fixed between the sensor disposing portion 62 and the recess 42.
  • oxygen generated by the oxygen generator 14 reaches the third flow path 51 via the intermediate flow path 15.
  • the flow of oxygen that has reached the third flow path 51 is turned at a right angle at the bent portion 52 and flows in the second flow path 43 and the first flow path 23 in order. And it discharges from the apparatus main body 11 and is supplied to a patient via the cannula 68.
  • the optical sensor 61 detects the light propagating through the oxygen supply channel 53 through the transmission window 46.
  • the oxygen concentrator 10 of this embodiment has the following features.
  • the optical sensor 61 is disposed on the extension line of the second flow path 43 of the attachment member 22 inside the oxygen concentrator 10. That is, the optical sensor 61 is located upstream of the attachment member 22 in the oxygen flow direction. Therefore, smoke caused by the flame generated by the cannula 68 flows downstream in the oxygen flow direction, so that the light detected by the optical sensor 61 on the upstream side in the oxygen flow direction is not shielded by the smoke, and the flame is surely blown. Can be detected. Further, by providing the optical sensor 61 on the extended line of the second flow path 43, the optical sensor 61 can reliably detect the flame without the oxygen supply flow path 53 blocking the light emitted by the flame.
  • an opaque transmission window 46 that shields visible light is provided, and a light sensor 61 such as a photodiode that can detect to the infrared region is used as a light receiving element, so that only visible light is received.
  • a visible light sensor such as a photodiode that can detect to the infrared region
  • the influence of ambient light such as sunlight and illumination light can be suppressed, and erroneous detection can be prevented.
  • impurities such as dust from adhering to the optical sensor 61.
  • the mounting member 22 is made of metal having good thermal conductivity, and the temperature sensor 27 is provided, so that the flame can be reliably detected by heat in addition to the optical sensor 61.
  • the oxygen supply channel 53 can be arranged in a compact manner by bending it at a right angle.
  • the attachment member 22 is made of metal, but is not limited thereto, and may be formed of various materials such as resin.
  • Oxygen concentrator 14
  • Oxygen generator 22
  • Mounting member 27
  • Thermistor temperature sensor
  • Transmission window 52
  • Bending part 53
  • Oxygen supply flow path 61
  • Optical sensor light receiving element
  • cannula oxygenator

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pulmonology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Management (AREA)
  • Otolaryngology (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
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Abstract

使用者が火災に気付いていない場合には、適切に酸素の排出を停止させることができない。このため、酸素供給源を有する酸素濃縮装置１０において、酸素供給源からの酸素が酸素排出器６８に供給されるときに、酸素排出器６８が取り付けられる取付け部材２２と、酸素濃縮装置１０の内側において、取付け部材２２の酸素供給流路２３の延長線上に配置された受光素子６１と、を備えた。

Description

酸素濃縮装置
　本発明は、装置本体から酸素排出器に酸素を供給する酸素濃縮装置に関する。
　一般に、慢性呼吸器疾患の患者に対し酸素吸入療法を行う際には、酸素濃縮装置から供給された酸素を鼻から吸引するためのカニューラと呼ばれる器具が用いられる。カニューラに酸素を供給する酸素濃縮装置として、例えば特許文献１には、空気中の窒素を吸着させて酸素濃縮ガスを生成する吸着方式の酸素濃縮装置が記載されている。
　ここで、例えばカニューラの周辺温度が火災などにより非常に高温になった場合に、カニューラ装着部の排出口からの酸素の排出を停止させる際には、電源スイッチを操作して酸素濃縮装置の電源を停止することが考えられる。
特開２００８－１３６６６３号公報
　しかし、特許文献１に記載の酸素濃縮装置では、使用者が火災に気付いていない場合には、適切に酸素の排出を停止させることができないという問題がある。
　そこで、この発明は上記のような課題を解決するためになされたもので、カニューラに生じた火災を確実に検知できる酸素濃縮装置を提供することを目的とする。
　第１の発明に係る酸素濃縮装置は、
　酸素供給源を有する酸素濃縮装置において、
　前記酸素供給源からの酸素が酸素排出器に供給されるときに、前記酸素排出器が取り付けられる取付け部材と、
　前記酸素濃縮装置の内側において、前記取付け部材の酸素供給流路の延長線上に配置された受光素子と、
　を備えた。
　この酸素濃縮装置では、受光素子が酸素濃縮装置の内側において、取付け部材の酸素供給流路の延長線上に配置されている。すなわち、受光素子は、取付け部材の酸素の流動方向上流側に位置している。従って、酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。これにより、適切に酸素の供給を停止できる。また酸素供給流路の延長線上に受光素子を設けることで、酸素供給流路が炎の発する光を遮断することなく、受光素子は確実に炎を検知できる。
　第２の発明に係る酸素濃縮装置は、
　前記受光素子が前記酸素排出器で生じた炎を検知したときに、酸素の供給が停止される。
　この酸素濃縮装置では、受光素子が前記酸素排出器で生じた炎を検知したときに、酸素の供給が適切に停止される。
　第３の発明に係る酸素濃縮装置は、
　前記酸素供給流路と前記受光素子との間に、光を透過する不透明の透過窓を設け、
　前記透過窓を介して光を検知する前記受光素子が赤外線領域まで検知可能な光センサである。
　この酸素濃縮装置では、可視光を遮蔽する不透明の透過窓を設け、かつ受光素子として赤外線領域まで検知可能なフォトダイオードなどの光センサを用いることで、可視光だけを受光する可視光センサを用いた場合と比べて太陽光や照明光など外乱光による影響を抑え、誤検知を防止できる。また酸素供給流路と受光素子との間に透過窓を設けることで、受光素子に埃などの不純物が付着するのを防止できる。
　第４の発明に係る酸素濃縮装置は、
　前記取付け部材が金属製であり、温度センサを有する。
　この酸素濃縮装置では、取付け部材が熱伝導性の良い金属製であり、かつ温度センサを設けることで、受光素子に加えて熱で炎を確実に検知できる。
　第５の発明に係る酸素濃縮装置は、
　前記酸素供給流路が、直角に折り曲げられた折曲げ部を有し、
　前記酸素供給流路と前記受光素子との間に配置され、光を透過する不透明の透過窓が前記折曲げ部に設けられた。
　この酸素濃縮装置では、酸素供給流路を直角に折り曲げることでコンパクトに配置できる。
　第６の発明に係る酸素濃縮装置は、
　前記酸素供給流路が、前記取付け部材に形成された第１流路を少なくとも有し、
　前記第１流路を流れる酸素の流動方向上流側に、前記受光素子が配置された。
　この酸素濃縮装置では、第１流路を流れる酸素の流動方向上流側に受光素子を配置した。酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。
　第７の発明に係る酸素濃縮装置は、
　前記取付け部材に接続された接続部材を更に備え、
　前記酸素供給流路が、前記第１流路と、前記第１流路と直線状に連通し、前記接続部材に形成された第２流路とを少なくとも有し、
　前記第２流路、前記第１流路を順に流れる酸素の流動方向上流側に、前記受光素子が配置された。
　この酸素濃縮装置では、第２流路、第１流路を順に流れる酸素の流動方向上流側に受光素子を配置した。酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。
　第１の発明では、受光素子が酸素濃縮装置の内側において、取付け部材の酸素供給流路の延長線上に配置されている。すなわち、受光素子は、取付け部材の酸素の流動方向上流側に位置している。従って、酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。また酸素供給流路の延長線上に受光素子を設けることで、酸素供給流路が炎の発する光を遮断することなく、受光素子は確実に炎を検知できる。
　第２の発明では、受光素子が前記酸素排出器で生じた炎を検知したときに、酸素の供給が適切に停止される。
　第３の発明では、可視光を遮蔽する不透明の透過窓を設け、かつ受光素子として赤外線領域まで検知可能なフォトダイオードなどの光センサを用いることで、可視光だけを受光する可視光センサを用いた場合と比べて太陽光や照明光など外乱光による影響を抑え、誤検知を防止できる。また酸素供給流路と受光素子との間に透過窓を設けることで、受光素子に埃などの不純物が付着するのを防止できる。
　第４の発明では、取付け部材が熱伝導性の良い金属製であり、かつ温度センサを設けることで、受光素子に加えて熱で炎を確実に検知できる。
　第５の発明では、酸素供給流路を直角に折り曲げることでコンパクトに配置できる。
　第６の発明では、第１流路を流れる酸素の流動方向上流側に受光素子を配置した。酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。
　第７の発明では、第２流路、第１流路を順に流れる酸素の流動方向上流側に受光素子を配置した。酸素排出器で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある受光素子の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。
本発明の実施形態に係る酸素濃縮装置の概略図。 図１の酸素濃縮装置の正面図。 図２のＡ－Ａ線断面図。 （ａ）は取付け部材の側面図、（ｂ）は（ａ）の断面図。 （ａ）は接続部材を後方から見た斜視図、（ｂ）は（ａ）のＣ－Ｃ線断面図。 （ａ）は固定板を前方から見た図、（ｂ）は（ａ）の側面図。 図２のＢ－Ｂ線断面図。
　以下、本発明の実施形態を添付図面に従って説明する。
　図１に示すように、本実施形態の酸素濃縮装置１０は、酸素吸入療法を受ける患者が酸素を鼻から吸引するために用いるカニューラ（酸素排出器）６８に接続され、このカニューラ６８に酸素を供給する。なお、酸素濃縮装置１０は、カニューラ以外の酸素排出用の器具に接続されていてもよい。
　酸素濃縮装置１０は、装置本体１１と、装置本体１１に配置された酸素供給部２０とを備えている。装置本体１１には、空気吸込口１３と排気口１２とが形成されている。また装置本体１１は、酸素濃縮ガスを生成する酸素生成部（酸素供給源）１４と、酸素生成部１４と酸素供給部２０とを接続する中間流路１５とを有する。
　本実施形態の酸素生成部１４は、高圧下で窒素を吸着すると共に低圧下で吸着した窒素を離脱させるゼオライトなどの吸着剤を用いることによって、酸素濃縮ガスの生成を行う。すなわち、酸素生成部１４は、空気吸込口１３及び空気吸込流路１７を介して外部から取り込んだ空気を圧縮し、圧縮空気中の窒素を吸着して酸素濃縮ガスを生成する。そして、低圧下において吸着剤から離脱された窒素は、排気流路１６及び排気口１２を介して外部に排出される。一方、酸素生成部１４で生成された酸素濃縮ガスは、中間流路１５を介して酸素供給部２０から吐出される。なお図１中、酸素生成部１４を間にして空気吸込口１３が配置されている方向を前方、排気口１２が配置されている方向を後方とする。
　図２に示すように、酸素供給部２０は装置本体１１の前面上部に設けられている。酸素供給部２０は、図３から６に示すように、取付け部材２２と接続部材３０と受光素子である赤外線領域まで検知可能な光センサ６１と固定板６０とを有する。
　図４（ａ）および図４（ｂ）に示すように、取付け部材２２は軸方向に延びる円筒形のノズルであり、内部に、後述する酸素供給流路５３の一部を構成する第１流路２３が形成されている。また取付け部材２２は熱伝導性の良い金属製であり、装置本体１１に水平方向に設置されている。図３に示すように取付け部材２２を装置本体１１に装着した状態では、取付け部材２２は、内部の部品を覆う外装カバー１８に支持されている。取付け部材２２の一方の前方側端部２４にはカニューラ６８が接続され、他方の後方側端部２５にはＯリング２６を介して接続部材３０が接続されている。後方側端部２５の外周には接続部材３０にわたって、取付け部材２２の温度を検出するサーミスタ（温度センサ）２７が配設されている。
　図５（ａ）に示すように、接続部材３０は樹脂製であり、基板３１と一対の支持脚３５とセンサ固定部４０と中間流路接続部５０とを有する。
　基板３１は、両端が半円形状に形成された長方形形状である。基板３１の長手方向の中央部には、図５（ｂ）に示すように、基板３１を厚さ方向に貫通する円形断面の貫通孔３２が形成されている。支持脚３５は基板３１から垂直に立ち上がり、後方に延びる円柱形状である。
　センサ固定部４０は、一対の支持脚３５の間に配置されている。センサ固定部４０は、基板３１の長手方向の中央部から垂直に立ち上がり、支持脚３５と同様に後方に延びる略四角柱である。センサ固定部４０の端面４１には、円形断面の凹部４２が形成されている。またセンサ固定部４０の内部には、円形断面の第２流路４３が形成されている。第２流路４３の径は貫通孔３２の径よりも小さくなっており、段部４４を介して貫通孔３２と連通している。凹部４２と第２流路４３との間の立壁４６は、後述するように凹部４２に配設される光センサ６１の不透明（可視光を遮蔽する不透明）の透過窓４６として構成される。
　中間流路接続部５０は、センサ固定部４０の外壁４７から垂直に立ち上がる円筒形状のノズルである。中間流路接続部５０の軸方向は、支持脚３５およびセンサ固定部４０の軸方向と直交し、且つ基板３１の長手方向と直交する。中間流路接続部５０の内部に形成された第３流路５１は、第２流路４３と連通している。後述する酸素供給流路５３を構成する第２流路４３と第３流路５１との間には、直角に折り曲げられた折曲げ部５２が形成されている。これにより、第３流路５１の軸心Ｌ１が、貫通孔３２および第２流路４３の軸心Ｌ２と直交している。また貫通孔３２および第２流路４３の軸心Ｌ２の延長線上、且つ折曲げ部５２に凹部４２が形成されている。
　接続部材３０を装置本体１１に装着した状態では、図３に示すように、取付け部材２２の後方側端部２５が貫通孔３２に嵌入される。これにより、第１流路２３と第２流路４３とが連通する。また中間流路接続部５０に中間流路１５が接続されることで、第３流路５１と中間流路１５とが連通する。第１流路２３と第２流路４３と第３流路５１とが酸素供給流路５３を構成している。この酸素供給流路５３は、第２流路４３と第３流路５１との間に形成された折曲げ部５２により直角に折り曲げられている。
　また、凹部４２と固定板６０との間には光センサ６１が配設されている。光センサ６１は、酸素濃縮装置１０の内側において、第１流路２３および第２流路４３の延長線上に配置されている。光センサ６１は、カニューラ６８に火災が発生した場合に、酸素供給流路５３を伝播する光を透過窓４６を介して検知する。透過窓４６は不透明であるが光を透過し、第２流路４３と光センサ６１との間に設けられている。
　図６（ａ）および図６（ｂ）に示すように、固定板６０は矩形状であり、センサ配設部６２と切欠き部６３とが形成されている。センサ配設部６２は固定板６０の中央部に設けられ、光センサ６１が配設される。切欠き部６３は固定板の側端面に形成され、センサ配設部６２に向かって湾曲している。図７に示すように、固定板６０を装置本体１１に装着した状態では、切欠き部６３の周縁が支持脚３５の先端部とねじにより固定されている。これにより、センサ配設部６２と凹部４２との間に光センサ６１を配設して固定できる。
　酸素濃縮装置１０を稼働すると、酸素生成部１４で生成された酸素が中間流路１５を介して第３流路５１まで到達する。第３流路５１に到達した酸素の流れは折曲げ部５２で直角に向きを変え、第２流路４３および第１流路２３内を順に流れる。そして装置本体１１から吐出され、カニューラ６８を介して患者まで供給される。
　カニューラ６８に火災が発生した場合には、光センサ６１が、酸素供給流路５３を伝播する光を透過窓４６を介して検知する。
[本実施形態の酸素濃縮装置の特徴]
　本実施形態の酸素濃縮装置１０には以下の特徴がある。
　本実施形態の酸素濃縮装置１０では、光センサ６１が酸素濃縮装置１０の内側において、取付け部材２２の第２流路４３の延長線上に配置されている。すなわち、光センサ６１は、取付け部材２２の酸素の流動方向上流側に位置している。従って、カニューラ６８で生じた炎による煙が酸素の流動方向下流側に流れるので、酸素の流動方向上流側にある光センサ６１の検知する光が煙によって遮蔽されることはなく、確実に炎を検知できる。また第２流路４３の延長線上に光センサ６１を設けることで、酸素供給流路５３が炎の発する光を遮断することなく、光センサ６１は確実に炎を検知できる。
　本実施形態の酸素濃縮装置１０では、可視光を遮蔽する不透明の透過窓４６を設け、かつ受光素子として赤外線領域まで検知可能なフォトダイオードなどの光センサ６１を用いることで、可視光だけを受光する可視光センサを用いた場合と比べて太陽光や照明光など外乱光による影響を抑え、誤検知を防止できる。また第２流路４３と光センサ６１との間に透過窓４６を設けることで、光センサ６１に埃などの不純物が付着するのを防止できる。
　本実施形態の酸素濃縮装置１０では、取付け部材２２が熱伝導性の良い金属製であり、かつ温度センサ２７を設けることで、光センサ６１に加えて熱で炎を確実に検知できる。
　本実施形態の酸素濃縮装置１０では、酸素供給流路５３を直角に折り曲げることでコンパクトに配置できる。
　以上、本発明の実施形態について図面に基づいて説明したが、具体的な構成は、これらの実施形態に限定されるものでないと考えられるべきである。本発明の範囲は、上記した実施形態の説明だけではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。
　前記実施形態では、取付け部材２２が金属製であるがこれに限定されず、例えば樹脂など種々の素材から形成されてもよい。
　　１０　酸素濃縮装置
　　１４　酸素生成部（酸素供給源）
　　２２　取付け部材
　　２７　サーミスタ（温度センサ）
　　４６　透過窓
　　５２　折曲げ部
　　５３　酸素供給流路
　　６１　光センサ（受光素子）
　　６８　カニューラ（酸素排出器）

Claims (7)

  1. 　酸素供給源を有する酸素濃縮装置において、
    　前記酸素供給源からの酸素が酸素排出器に供給されるときに、前記酸素排出器が取り付けられる取付け部材と、
    　前記酸素濃縮装置の内側において、前記取付け部材の酸素供給流路の延長線上に配置された受光素子と、
    　を備えたことを特徴とする酸素濃縮装置。
  2. 　前記受光素子が前記酸素排出器で生じた炎を検知したときに、酸素の供給が停止されることを特徴とする請求項１に記載の酸素濃縮装置。
  3. 　前記酸素供給流路と前記受光素子との間に、光を透過する不透明の透過窓を設け、
    　前記透過窓を介して光を検知する前記受光素子が、赤外線領域まで検知可能な光センサであることを特徴とする請求項１又は２に記載の酸素濃縮装置。
  4. 　前記取付け部材が金属製であり、温度センサを有することを特徴とする請求項１から３のいずれかに記載の酸素濃縮装置。
  5. 　前記酸素供給流路が、直角に折り曲げられた折曲げ部を有し、
    　前記酸素供給流路と前記受光素子との間に配置され、光を透過する不透明の透過窓が前記折曲げ部に設けられたことを特徴とする請求項１から４のいずれかに記載の酸素濃縮装置。
  6. 　前記酸素供給流路が、前記取付け部材に形成された第１流路を少なくとも有し、
    　前記第１流路を流れる酸素の流動方向上流側に、前記受光素子が配置されたことを特徴とする請求項１から５のいずれかに記載の酸素濃縮装置。
  7. 　前記取付け部材に接続された接続部材を更に備え、
    　前記酸素供給流路が、前記第１流路と、前記第１流路と直線状に連通し、前記接続部材に形成された第２流路とを少なくとも有し、
    　前記第２流路、前記第１流路を順に流れる酸素の流動方向上流側に、前記受光素子が配置されたことを特徴とする請求項６に記載の酸素濃縮装置。
PCT/JP2016/080834 2015-11-16 2016-10-18 酸素濃縮装置 WO2017086075A1 (ja)

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