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WO2016121134A1 - Respiration device - Google Patents

Respiration device Download PDF

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Publication number
WO2016121134A1
WO2016121134A1 PCT/JP2015/058400 JP2015058400W WO2016121134A1 WO 2016121134 A1 WO2016121134 A1 WO 2016121134A1 JP 2015058400 W JP2015058400 W JP 2015058400W WO 2016121134 A1 WO2016121134 A1 WO 2016121134A1
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WO
WIPO (PCT)
Prior art keywords
pressure sensor
face
absolute pressure
electric fan
respiration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/058400
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French (fr)
Japanese (ja)
Inventor
研一 小野
弘之 井出
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shigematsu Works Co Ltd
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Shigematsu Works Co Ltd
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Filing date
Publication date
Application filed by Shigematsu Works Co Ltd filed Critical Shigematsu Works Co Ltd
Publication of WO2016121134A1 publication Critical patent/WO2016121134A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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. ventilators; Tracheal tubes
    • A61M16/06—Respiratory or anaesthetic masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/02—Masks
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus

Definitions

  • the present invention relates to a respiratory apparatus.
  • Patent Document 1 discloses a respiratory apparatus that includes a filter that filters outside air, a respiratory monitor device, and a control device that controls the operation of an electric fan in conjunction with respiration based on a detection signal of the respiratory monitor device.
  • the breathing apparatus of Patent Document 1 maintains the intracorporeal pressure (relative to the external pressure of the face) at a predetermined positive pressure by controlling the operation of the electric fan in conjunction with breathing based on the detection signal of the breath monitoring apparatus. It is.
  • the respiratory monitoring device includes a diaphragm for receiving intra-body pressure (relative pressure), a magnet attached to the diaphragm, and a hall element facing the magnet, and a diaphragm that follows fluctuations in intra-body pressure (relative pressure) due to respiration.
  • the Hall element detects the displacement of the body, the pressure in the face (relative pressure) is detected and respiration is monitored.
  • the pressure in the in-plane (relative to the tolerance of the material and the shape of the diaphragm, the tolerance of the shape and dimension of the diaphragm mounting portion, the tolerance of the mounting accuracy of the diaphragm attached manually, etc.
  • the response of the diaphragm to pressure fluctuation varies from product to product, and the operation control of the electric fan linked to breathing varies from product to product.
  • the predetermined positive pressure value of the in-plane pressure to be maintained varies from product to product. .
  • the present invention has been made in view of the above problems, and is a respiratory apparatus in which the operation of an electric fan is controlled in conjunction with respiration based on a detection signal of a respiratory monitor apparatus, and variation in electric fan control among products.
  • An object of the present invention is to provide a respiratory apparatus in which the above is suppressed.
  • a face body that covers a part or all of the face, an intake valve and an exhaust valve attached to the face body, and external air is supplied to the face body via the intake valve.
  • a respiratory monitoring device comprising an electric fan, a filter for filtering outside air supplied to the face body, a respiratory monitoring device, and a control device that controls the operation of the electric fan in conjunction with breathing based on a detection signal of the respiratory monitoring device
  • a breathing apparatus comprising a first absolute pressure sensor for detecting an external pressure in the face and a second absolute pressure sensor for detecting an in-plane pressure.
  • the respiratory monitoring device of the respiratory apparatus includes the first absolute pressure sensor that detects the external pressure in the face and the second absolute pressure sensor that detects the pressure in the face. By subtracting the detection pressure of 1 absolute pressure sensor, the in-plane pressure (relative pressure) that is the differential pressure between them can be detected. Diaphragm response which has been a problem in the breathing apparatus of Patent Document 1 by using the high-precision and micro-size absolute pressure sensor that has begun to be offered to the market in recent years as the first absolute pressure sensor and the second absolute pressure sensor. The variation of each product of the electric fan control linked to the respiration caused by the variation of each product can be suppressed.
  • control device controls the electric fan so that the differential pressure between the in-plane pressure detected by the second absolute pressure sensor and the external pressure detected by the first absolute pressure sensor becomes a predetermined positive pressure. Control the operation. By the above operation of the control device, the in-plane pressure (relative pressure) is maintained at a predetermined positive pressure.
  • a face body that covers part or all of the face, an intake valve and an exhaust valve attached to the face body, an electric fan that supplies outside air to the face body via the intake valve, and a face body are supplied.
  • a filter that filters outside air, a respiratory monitoring device, and a control device that controls the operation of the electric fan in conjunction with respiration based on a detection signal of the respiratory monitoring device.
  • the electric fan and the filter are connected via an air supply hose.
  • the respiration monitor device connected to the face body includes a first absolute pressure sensor that detects an internal pressure at a first predetermined position in the air supply passage formed by the electric fan, the filter, and the air supply hose, and a second air pressure in the air supply passage.
  • a respiration apparatus in which the operation of an electric fan is controlled in conjunction with respiration based on a detection signal of a respiration monitor apparatus, and the respiration apparatus in which an electric fan and a filter are connected to a face body via an air supply hose is conventionally known. As disclosed in EP Patent No.
  • the internal pressure at the first predetermined position and the internal pressure at the second predetermined position in the air supply passage formed by the electric fan, the filter, and the air supply hose is detected using a relative pressure sensor having a diaphragm, or a differential pressure between an internal pressure at a third predetermined position in the supply passage and an external pressure in the supply passage is used using a relative pressure sensor having a diaphragm. Based on the detected differential pressure, the operation control of the electric fan linked to breathing is performed. Also in the above breathing apparatus, the differential pressure between the first predetermined position and the second predetermined position detected using the high-precision and small-size absolute pressure sensor is detected, or the high-precision and small-size absolute pressure is detected.
  • a differential pressure between the third predetermined position detected by the sensor and the absolute pressure at the position outside the supply passage is detected, or a fourth predetermined value in the face detected by using an absolute pressure sensor with high accuracy and a minute dimension.
  • the respiratory apparatus includes zero point correction means for simultaneously correcting the zero points of the first absolute pressure sensor and the second absolute pressure sensor.
  • zero point correction means for simultaneously correcting the zero points of the first absolute pressure sensor and the second absolute pressure sensor.
  • FIG. 1 is a cross-sectional view of a respiratory apparatus according to a first embodiment of the present invention. It is an external view of the respiratory apparatus which concerns on 2nd Example of this invention.
  • the respiratory apparatus A includes a half-faced bowl-shaped face 1 that covers the nose and mouth of the user's face, and a reed valve-type intake valve 2 that is attached to the face 1.
  • An exhaust valve 3 an electric fan 4 that is disposed upstream of the intake valve 2 with respect to the intake air flow and supplies outside air into the face body 1 through the intake valve 2, and an upstream side of the electric fan 4 with respect to the intake air flow.
  • a filter 5 for filtering outside air sucked into the electric fan 4.
  • the breathing apparatus A includes a first absolute pressure sensor 6 attached to the outer surface of the face piece 1 and a second absolute pressure sensor 7 attached to the inner face of the face piece 1.
  • the first absolute pressure sensor 6 and the second absolute pressure sensor 7 cooperate to form a respiratory monitoring device 8.
  • the first absolute pressure sensor 6 and the second absolute pressure sensor 7 are evacuated as disclosed in, for example, JP-A-6-018345, JP-A-11-241966, JP-A-2000-019044, and the like.
  • a held reference pressure chamber and a part of the boundary wall of the reference pressure chamber are formed, and a diaphragm exposed to the external environment and a suncer for measuring the displacement of the diaphragm are provided.
  • an absolute pressure sensor having a high accuracy and a minute size has been developed and provided to the market.
  • the breathing apparatus A includes a control device 9 that receives the detection signal of the first absolute pressure sensor 6 and the detection signal of the second absolute pressure sensor 7 and controls the operation of the electric fan 4.
  • the control device 9 is disposed in the vicinity of the electric fan 4.
  • the breathing apparatus A further includes a detachable battery (not shown) that is attached to the face piece 1 and supplies power to the control device 9. Electric power is supplied to the electric fan 4, the first absolute pressure sensor 6, and the second absolute pressure sensor 7 via the control device 9.
  • a user of the respiratory apparatus A first attaches a battery (not shown) to the respiratory apparatus A before attaching the face 1 to the face. Electric power is supplied from the battery to the control device 9. As soon as power supply is started, the control device 9 corrects the zero point of the first absolute pressure sensor 6 and the second absolute pressure sensor 7. The first absolute pressure sensor 6 and the second absolute pressure sensor 7 subjected to the zero point correction start measuring absolute pressure.
  • a user wears the face 1 on the face. The user wears the face 1 on the head so as to cover a part including the nose and mouth of the user's face indicated by a one-dot chain line in FIG. 1 or to cover the entire face of the user.
  • the annular edge portion of the face piece 1 is brought into close contact with the face to prevent the outside air from entering the face piece 1 from the contact portion between the annular edge portion and the face.
  • the respiratory apparatus A is attached to the user's head.
  • clean air is supplied to the face piece 1 through the filter 5, the electric fan 4, and the intake valve 2, and becomes the user's intake air.
  • the exhalation of the user passes through the exhaust valve 3 and is discharged out of the face piece 1.
  • a detection signal from the first absolute pressure sensor 6 and a detection signal from the second absolute pressure sensor 7 are input to the control device 9.
  • the control device 9 subtracts the detected pressure of the first absolute pressure sensor 6 from the detected pressure of the second absolute pressure sensor 7 to calculate the in-plane pressure (relative pressure) that is the differential pressure between the two.
  • the control device 9 recognizes that the respiratory device A is attached to the user's head when the amount of change from zero in the intra-body pressure (relative pressure) exceeds a predetermined value, and starts the electric fan 4.
  • the control device 9 repeatedly calculates the intracorporeal pressure (relative pressure) based on the detection signals of the first absolute pressure sensor 6 and the second absolute pressure sensor 7 at predetermined minute time intervals, and the calculated intracorporeal pressure is a predetermined positive pressure.
  • the rotation speed control of the electric fan 4 is repeated so as to be maintained.
  • the rotational speed of the electric fan 4 increases during inhalation, and the rotational speed of the electric fan 4 decreases during expiration, or the electric fan 4 stops.
  • the in-plane pressure returns to zero.
  • the controller 9 recognizes that the breathing apparatus A has been removed from the user's head when the in-plane pressure has returned to zero and continues for a predetermined time, and stops the electric fan 4.
  • the respiratory monitoring device 8 includes the first absolute pressure sensor 6 that detects the external pressure of the face and the second absolute pressure sensor 7 that detects the pressure in the face, and therefore the detection pressure of the second absolute pressure sensor 7.
  • the in-plane pressure relative pressure
  • the first absolute pressure sensor 6 and the second absolute pressure sensor 7 there has been a problem in the breathing apparatus of Patent Document 1. It is possible to suppress the variation of each product of the electric fan control linked to the respiration, which is caused by the variation of the diaphragm responsiveness from product to product.
  • the in-plane pressure is controlled. (Relative pressure) is maintained at a predetermined positive pressure.
  • the controller 9 simultaneously detects the zero point correction of the first absolute pressure sensor 6 and the second absolute pressure sensor 7, thereby making it possible to detect the subsequent in-plane pressure (relative pressure). The zero point correction needs to be performed before mounting the face piece in which the first absolute pressure sensor 6 and the second absolute pressure sensor 7 are under the same pressure condition.
  • a zero point correction switch and a zero point correction button may be attached to the face body 1, and the zero point correction of the first absolute pressure sensor 6 and the second absolute pressure sensor 7 may be performed simultaneously by manually operating the zero point correction switch and the zero point correction button.
  • the face piece 1 may be a full face face covering the entire face of the user.
  • a respiration apparatus in which the operation of the electric fan is controlled in conjunction with respiration based on a detection signal of the respiration monitor apparatus, and the electric fan 4 and the filter 5 are connected to the face piece 1 via the air supply hose 10 as shown in FIG.
  • the breathing apparatus B connected to the air supply passage 11, the air supply passage 11 formed by the electric fan 4, the filter 5, and the air supply hose 10 is conventionally disclosed in EP Patent No. 0130707 and EP Patent No. 05293838.
  • a differential pressure between an internal pressure at an intermediate position between the first predetermined position, for example, the electric fan 4 and the filter 5, and an internal pressure at a second predetermined position, for example, a position immediately downstream of the electric fan 4, is detected using a relative pressure sensor having a diaphragm.
  • a differential pressure between an internal pressure at a third predetermined position in the air supply passage 11, for example, an intermediate position between the electric fan 4 and the filter 5, and an external pressure in the air supply passage 11 can be obtained. It detected using the relative pressure sensor having, based on the detected differential pressure, and controls the operation of the electric fan 4 interlocked with respiration. Also in the respiratory apparatus, the absolute pressure at the first predetermined position and the second predetermined position, or the absolute value outside the third predetermined position and the air supply passage, which is detected using an absolute pressure sensor with a high accuracy and a minute dimension.
  • the present invention is supplied to a face piece that covers part or all of the face, an intake valve and an exhaust valve attached to the face piece, an electric fan that supplies outside air to the face piece through the intake valve, and a face piece.
  • the present invention can be widely used in a respiration apparatus including a filter that filters outside air, a respiration monitor apparatus, and a control apparatus that controls the operation of an electric fan in conjunction with respiration based on a detection signal of the respiration monitor apparatus.
  • A, B Respirator 1 Face body 2 Intake valve 3 Exhaust valve 4 Electric fan 5 Filter 6 First absolute pressure sensor 7 Second absolute pressure sensor 8 Respiration monitor device 9 Control device 10 Air supply hose 11 Air supply passage

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  • Health & Medical Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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Abstract

[Problem] To provide a respiration device in which the operation of an electric fan is controlled in conjunction with respiration on the basis of a detection signal of a respiration monitoring device, wherein fluctuations in the control of the electric fan in each product is suppressed. [Solution] The present invention comprises: a facepiece which partially or completely covers the face; an intake valve and an exhaust valve which are attached to the facepiece; an electric fan which supplies external air into the facepiece via the intake valve; a filter which filters the external air supplied to the facepiece; a respiration monitoring device; and a control device which controls the operation of the electric fan in conjunction with respiration on the basis of a detection signal of the respiration monitoring device. The respiration monitoring device is provided with a first absolute pressure sensor which detects the external pressure of the facepiece, and a second absolute pressure sensor which detects the internal pressure of the facepiece.

Description

呼吸装置Breathing apparatus

本発明は、呼吸装置に関するものである。 The present invention relates to a respiratory apparatus.

本願出願人は、顔面の一部又は全部を覆う面体と、面体に取り付けられた、吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備える呼吸装置を特許文献１で開示した。
特許文献１の呼吸装置は、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御することにより、面体内圧（面体外圧との相対圧）を所定の正圧に維持するものである。呼吸モニター装置は、面体内圧（相対圧）を受圧するダイヤフラムとダイヤフラムに取り付けられた磁石と、磁石に対峙するホール素子とを備えており、呼吸に伴う面体内圧（相対圧）変動に追随するダイヤフラムの変位をホール素子が検知することにより面体内圧（相対圧）を検知し、呼吸をモニターする。 The applicant of the present application is supplied to a face piece covering a part or all of the face, an intake valve and an exhaust valve attached to the face piece, an electric fan for supplying outside air to the face piece via the intake valve, and the face piece. Patent Document 1 discloses a respiratory apparatus that includes a filter that filters outside air, a respiratory monitor device, and a control device that controls the operation of an electric fan in conjunction with respiration based on a detection signal of the respiratory monitor device.
The breathing apparatus of Patent Document 1 maintains the intracorporeal pressure (relative to the external pressure of the face) at a predetermined positive pressure by controlling the operation of the electric fan in conjunction with breathing based on the detection signal of the breath monitoring apparatus. It is. The respiratory monitoring device includes a diaphragm for receiving intra-body pressure (relative pressure), a magnet attached to the diaphragm, and a hall element facing the magnet, and a diaphragm that follows fluctuations in intra-body pressure (relative pressure) due to respiration. When the Hall element detects the displacement of the body, the pressure in the face (relative pressure) is detected and respiration is monitored.

特開２００９－１３６５２１JP 2009-136521 A

特許文献１の呼吸装置には、ダイヤフラムの素材と形状寸法の公差、ダイヤフラム取付部の形状寸法の公差、手作業により取り付けられたダイヤフラムの取付精度の公差、等に起因して、面体内圧（相対圧）変動に対するダイヤフラムの応答が製品毎にばらつき、呼吸に連動する電動ファンの作動制御が製品毎にばらつき、その結果、維持すべき面体内圧の所定正圧値が製品毎にばらつくという問題がある。
本発明は、上記問題に鑑みてなされたものであり、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動が制御される呼吸装置であって、電動ファン制御の製品毎のばらつきが抑制された呼吸装置を提供することを目的とする。 In the breathing apparatus of Patent Document 1, the pressure in the in-plane (relative to the tolerance of the material and the shape of the diaphragm, the tolerance of the shape and dimension of the diaphragm mounting portion, the tolerance of the mounting accuracy of the diaphragm attached manually, etc. The response of the diaphragm to pressure fluctuation varies from product to product, and the operation control of the electric fan linked to breathing varies from product to product. As a result, the predetermined positive pressure value of the in-plane pressure to be maintained varies from product to product. .
The present invention has been made in view of the above problems, and is a respiratory apparatus in which the operation of an electric fan is controlled in conjunction with respiration based on a detection signal of a respiratory monitor apparatus, and variation in electric fan control among products. An object of the present invention is to provide a respiratory apparatus in which the above is suppressed.

上記課題を解決するために、本発明においては、顔面の一部又は全部を覆う面体と、面体に取り付けられた、吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備え、呼吸モニター装置は、面体外圧を検知する第１絶対圧力センサーと面体内圧を検知する第２絶対圧力センサーとを備えることを特徴とする呼吸装置を提供する。
本発明に係る呼吸装置の呼吸モニター装置は、面体外圧を検知する第１絶対圧力センサーと面体内圧を検知する第２絶対圧力センサーとを備えているので、第２絶対圧力センサーの検知圧から第１絶対圧力センサーの検知圧を差し引くことにより、両者の差圧である面体内圧（相対圧）を検知することができる。近年市場に提供され始めた、高精度且つ微小寸法の絶対圧力センサーを、第１絶対圧力センサー、第２絶対圧力センサーとして使用することにより、特許文献１の呼吸装置で問題となった、ダイヤフラム応答性の製品毎のばらつきに起因する、呼吸に連動した電動ファン制御の製品毎のばらつきを抑制することができる。 In order to solve the above problems, in the present invention, a face body that covers a part or all of the face, an intake valve and an exhaust valve attached to the face body, and external air is supplied to the face body via the intake valve. A respiratory monitoring device comprising an electric fan, a filter for filtering outside air supplied to the face body, a respiratory monitoring device, and a control device that controls the operation of the electric fan in conjunction with breathing based on a detection signal of the respiratory monitoring device Provides a breathing apparatus comprising a first absolute pressure sensor for detecting an external pressure in the face and a second absolute pressure sensor for detecting an in-plane pressure.
The respiratory monitoring device of the respiratory apparatus according to the present invention includes the first absolute pressure sensor that detects the external pressure in the face and the second absolute pressure sensor that detects the pressure in the face. By subtracting the detection pressure of 1 absolute pressure sensor, the in-plane pressure (relative pressure) that is the differential pressure between them can be detected. Diaphragm response which has been a problem in the breathing apparatus of Patent Document 1 by using the high-precision and micro-size absolute pressure sensor that has begun to be offered to the market in recent years as the first absolute pressure sensor and the second absolute pressure sensor. The variation of each product of the electric fan control linked to the respiration caused by the variation of each product can be suppressed.

本発明の好ましい態様においては、制御装置は、第２絶対圧力センサーが検知した面体内圧と第１絶対圧力センサーが検知した面体外圧との差圧が所定の正圧になるように、電動ファンの作動を制御する。
制御装置の上記作動により、面体内圧（相対圧）が所定の正圧に維持される。 In a preferred aspect of the present invention, the control device controls the electric fan so that the differential pressure between the in-plane pressure detected by the second absolute pressure sensor and the external pressure detected by the first absolute pressure sensor becomes a predetermined positive pressure. Control the operation.
By the above operation of the control device, the in-plane pressure (relative pressure) is maintained at a predetermined positive pressure.

本発明においては、顔面の一部又は全部を覆う面体と、面体に取り付けられた吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備え、電動ファンとフィルターとが給気ホースを介して面体に接続され、呼吸モニター装置は、電動ファンとフィルターと給気ホースとが形成する給気通路内の第１所定位置の内圧を検知する第１絶対圧力センサーと前記給気通路内の第２所定位置の内圧を検知する第２絶対圧力センサーとを備え、又は前記給気通路内の第３所定位置の内圧を検知する第１絶対圧力センサーと記給気通路の外圧を検知する第２絶対圧力センサーとを備え、又は面体内の第４所定位置の内圧を検知する第１絶対圧力センサーと面体外圧を検知する第２絶対圧力センサーとを備えることを特徴とする呼吸装置を提供する。
呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動が制御される呼吸装置であって、電動ファンとフィルターとが給気ホースを介して面体に接続された呼吸装置においては、従来、ＥＰ特許第０１３０７０７号やＥＰ特許第０３５２９３８号に開示されているように、電動ファンとフィルターと給気ホースとが形成する給気通路内の第１所定位置の内圧と第２所定位置の内圧との差圧をダイアフラムを有する相対圧力センサを用いて検知し、或いは前記給気通路内の第３所定位置の内圧と前記給気通路の外圧との差圧をダイアフラムを有する相対圧力センサを用いて検知し、検知した差圧に基づいて、呼吸に連動する電動ファンの作動制御を行っている。上記呼吸装置においても、高精度且つ微小寸法の絶対圧力センサーを用いて検知した第１所定位置と第２所定位置の絶対圧力から両者の差圧を検知し、或いは高精度且つ微小寸法の絶対圧力センサーを用いて検知した第３所定位置と給気通路外位置の絶対圧力から両者の差圧を検知して、又は高精度且つ微小寸法の絶対圧力センサーを用いて検知した面体内の第４所定位置と面体外位置の絶対圧力から両者の差圧を検知して、前記差圧に基づく電動ファンの作動制御を行うことにより、ダイヤフラム応答性の製品毎のばらつきに起因する、呼吸に連動した電動ファン制御の製品毎のばらつきを抑制することができる。 In the present invention, a face body that covers part or all of the face, an intake valve and an exhaust valve attached to the face body, an electric fan that supplies outside air to the face body via the intake valve, and a face body are supplied. A filter that filters outside air, a respiratory monitoring device, and a control device that controls the operation of the electric fan in conjunction with respiration based on a detection signal of the respiratory monitoring device. The electric fan and the filter are connected via an air supply hose. The respiration monitor device connected to the face body includes a first absolute pressure sensor that detects an internal pressure at a first predetermined position in the air supply passage formed by the electric fan, the filter, and the air supply hose, and a second air pressure in the air supply passage. A second absolute pressure sensor for detecting an internal pressure at a predetermined position, or a first absolute pressure sensor for detecting an internal pressure at a third predetermined position in the air supply passage and a second absolute pressure for detecting an external pressure of the air supply passage. Pressure And a sensor, or to provide a breathing apparatus, characterized in that it comprises a second absolute pressure sensor for detecting a first absolute pressure sensor and facepiece external pressure for detecting the internal pressure of the fourth predetermined position within the face piece.
A respiration apparatus in which the operation of an electric fan is controlled in conjunction with respiration based on a detection signal of a respiration monitor apparatus, and the respiration apparatus in which an electric fan and a filter are connected to a face body via an air supply hose is conventionally known. As disclosed in EP Patent No. 0130707 and EP Patent No. 05292938, the internal pressure at the first predetermined position and the internal pressure at the second predetermined position in the air supply passage formed by the electric fan, the filter, and the air supply hose. Is detected using a relative pressure sensor having a diaphragm, or a differential pressure between an internal pressure at a third predetermined position in the supply passage and an external pressure in the supply passage is used using a relative pressure sensor having a diaphragm. Based on the detected differential pressure, the operation control of the electric fan linked to breathing is performed. Also in the above breathing apparatus, the differential pressure between the first predetermined position and the second predetermined position detected using the high-precision and small-size absolute pressure sensor is detected, or the high-precision and small-size absolute pressure is detected. A differential pressure between the third predetermined position detected by the sensor and the absolute pressure at the position outside the supply passage is detected, or a fourth predetermined value in the face detected by using an absolute pressure sensor with high accuracy and a minute dimension. By detecting the differential pressure between the absolute pressure at the position and the position outside the body and controlling the operation of the electric fan based on the differential pressure, the electric motor linked to breathing is caused by the variation in diaphragm responsiveness for each product. It is possible to suppress the variation of each fan control product.

本発明の好ましい態様においては、呼吸装置は、第１絶対圧力センサーと第２絶対圧力センサーの零点補正を同時に行う零点補正手段を備える。
零点補正手段を用いて第１絶対圧力センサーと第２絶対圧力センサーの零点補正を同時に行うことにより、その後の、第１絶対圧力センサーの設置位置と第２絶対圧力センサーの設置位置との間の差圧検知が可能となる。零点補正は、面体装着前に行う必要がある。 In a preferred aspect of the present invention, the respiratory apparatus includes zero point correction means for simultaneously correcting the zero points of the first absolute pressure sensor and the second absolute pressure sensor.
By performing zero point correction of the first absolute pressure sensor and the second absolute pressure sensor at the same time using the zero point correction means, the subsequent position between the first absolute pressure sensor and the second absolute pressure sensor is determined. Differential pressure detection is possible. The zero point correction needs to be performed before mounting the face piece.

本発明の第１実施例に係る呼吸装置の断面図である。1 is a cross-sectional view of a respiratory apparatus according to a first embodiment of the present invention. 本発明の第２実施例に係る呼吸装置の外観図である。It is an external view of the respiratory apparatus which concerns on 2nd Example of this invention.

本発明の実施例に係る呼吸装置を説明する。
図１に示すように、呼吸装置Ａは、使用者の顔面の鼻部と口部とを覆う半面形の椀状の面体１と、面体１に取り付けられた、リード弁形式の吸気弁２と排気弁３と、吸気流に関して吸気弁２の上流側に配設され吸気弁２を介して面体１内に外気を供給する電動ファン４と、吸気流に関して電動ファン４の上流側に配設され電動ファン４に吸引される外気を濾過するフィルター５とを備えている。
呼吸装置Ａは、面体１の外面に取り付けられた第１絶対圧力センサー６と面体１の内面に取り付けられた第２絶対圧力センサー７とを備えている。第１絶対圧力センサー６と第２絶対圧力センサー７とは協働して呼吸モニター装置８を形成している。
第１絶対圧力センサー６、第２絶対圧力センサー７は、例えば特開平６－０１８３４５号公報、特開平１１－２４１９６６号公報、特開２０００－０１９０４４号公報等に開示されているように、真空に保持された基準圧室と基準圧室の境界壁の一部を形成すると共に外部環境に暴露されたダイヤフラムとダイヤフラムの変位を計測するサンサーとを備えている。近年では、特開２０１１－１８５９０３号公報に開示されているように、高精度且つ微小寸法の絶対圧力センサーが開発され、市場に提供されている。従って、第１絶対圧力センサー６、第２絶対圧力センサー７として、市場に提供された高精度且つ微小寸法の絶対圧力センサーを使用するのが望ましい。
呼吸装置Ａは、第１絶対圧力センサー６の検知信号と第２絶対圧力センサー７の検知信号とを受けて電動ファン４の作動を制御する制御装置９を備えている。制御装置９は、電動ファン４の近傍に配設されている。呼吸装置Ａは更に、面体１に取り付けられて、制御装置９に電力を供給する図示しない着脱可能なバッテリーを備えている。電動ファン４、第１絶対圧力センサー６、第２絶対圧力センサー７には、制御装置９を介して電力が供給される。 A respiratory apparatus according to an embodiment of the present invention will be described.
As shown in FIG. 1, the respiratory apparatus A includes a half-faced bowl-shaped face 1 that covers the nose and mouth of the user's face, and a reed valve-type intake valve 2 that is attached to the face 1. An exhaust valve 3, an electric fan 4 that is disposed upstream of the intake valve 2 with respect to the intake air flow and supplies outside air into the face body 1 through the intake valve 2, and an upstream side of the electric fan 4 with respect to the intake air flow. And a filter 5 for filtering outside air sucked into the electric fan 4.
The breathing apparatus A includes a first absolute pressure sensor 6 attached to the outer surface of the face piece 1 and a second absolute pressure sensor 7 attached to the inner face of the face piece 1. The first absolute pressure sensor 6 and the second absolute pressure sensor 7 cooperate to form a respiratory monitoring device 8.
The first absolute pressure sensor 6 and the second absolute pressure sensor 7 are evacuated as disclosed in, for example, JP-A-6-018345, JP-A-11-241966, JP-A-2000-019044, and the like. A held reference pressure chamber and a part of the boundary wall of the reference pressure chamber are formed, and a diaphragm exposed to the external environment and a suncer for measuring the displacement of the diaphragm are provided. In recent years, as disclosed in Japanese Patent Application Laid-Open No. 2011-185903, an absolute pressure sensor having a high accuracy and a minute size has been developed and provided to the market. Therefore, it is desirable to use, as the first absolute pressure sensor 6 and the second absolute pressure sensor 7, an absolute pressure sensor having a high accuracy and a small size provided on the market.
The breathing apparatus A includes a control device 9 that receives the detection signal of the first absolute pressure sensor 6 and the detection signal of the second absolute pressure sensor 7 and controls the operation of the electric fan 4. The control device 9 is disposed in the vicinity of the electric fan 4. The breathing apparatus A further includes a detachable battery (not shown) that is attached to the face piece 1 and supplies power to the control device 9. Electric power is supplied to the electric fan 4, the first absolute pressure sensor 6, and the second absolute pressure sensor 7 via the control device 9.

呼吸装置Ａの作動を説明する。
呼吸装置Ａの使用者は、面体１を顔面に装着する前に、先ず図示しないバッテリーを呼吸装置Ａに装着する。バッテリーから制御装置９に電力が供給される。制御装置９は、電力供給が開始されると直ちに、第１絶対圧力センサー６、第２絶対圧力センサー７の零点補正を行う。零点補正がされた第１絶対圧力センサー６、第２絶対圧力センサー７は、絶対圧力の計測を開始する。
使用者が面体１を顔面に装着する。使用者は、図１に一点鎖線で示す使用者の顔面の鼻と口とを含む一部を覆うように、或いは使用者の顔面の全部を覆うように、面体１を頭部に装着する。面体１の環状縁部が顔面に密着して、前記環状縁部と顔面との当接部からの面体１内への外気の侵入を阻止する。面体１が使用者の顔面に装着されることにより、呼吸装置Ａが使用者の頭部に装着される。
使用者の吸気動作に伴って、フィルター５と電動ファン４と吸気弁２とを通って面体１に清浄空気が供給され、使用者の吸気となる。使用者の呼気動作に伴って、使用者の呼気が排気弁３を通って面体１外へ排出される。
第１絶対圧力センサー６の検知信号と第２絶対圧力センサー７の検知信号とが制御装置９に入力される。制御装置９は、第２絶対圧力センサー７の検知圧力から第１絶対圧力センサー６の検知圧力を差し引いて、両者の差圧である面体内圧（相対圧力）を算出する。制御装置９は、面体内圧（相対圧力）の零値からの変化量が所定値を超えると呼吸装置Ａが使用者の頭部に装着されたと認識し、電動ファン４を始動させる。制御装置９は、所定の微小時間間隔で第１絶対圧力センサー６、第２絶対圧力センサー７の検知信号に基づいて面体内圧（相対圧力）の算出を繰り返し、算出した面体内圧が所定の正圧に維持されるように、電動ファン４の回転数制御を繰り返す。この結果、吸気時には電動ファン４の回転数が増加し、呼気時には電動ファン４の回転数が減少し、或いは電動ファン４が停止する。
呼吸装置Ａが使用者の頭部から取り外されると、面体内圧（相対圧力）が零値に復帰する。制御装置９は、面体内圧が零値に復帰した状態が所定時間継続すると、呼吸装置Ａが使用者の頭部から取り外されたと認識し、電動ファン４を停止させる。 The operation of the breathing apparatus A will be described.
A user of the respiratory apparatus A first attaches a battery (not shown) to the respiratory apparatus A before attaching the face 1 to the face. Electric power is supplied from the battery to the control device 9. As soon as power supply is started, the control device 9 corrects the zero point of the first absolute pressure sensor 6 and the second absolute pressure sensor 7. The first absolute pressure sensor 6 and the second absolute pressure sensor 7 subjected to the zero point correction start measuring absolute pressure.
A user wears the face 1 on the face. The user wears the face 1 on the head so as to cover a part including the nose and mouth of the user's face indicated by a one-dot chain line in FIG. 1 or to cover the entire face of the user. The annular edge portion of the face piece 1 is brought into close contact with the face to prevent the outside air from entering the face piece 1 from the contact portion between the annular edge portion and the face. By attaching the face 1 to the user's face, the respiratory apparatus A is attached to the user's head.
With the user's intake operation, clean air is supplied to the face piece 1 through the filter 5, the electric fan 4, and the intake valve 2, and becomes the user's intake air. Accompanying the user's exhalation operation, the exhalation of the user passes through the exhaust valve 3 and is discharged out of the face piece 1.
A detection signal from the first absolute pressure sensor 6 and a detection signal from the second absolute pressure sensor 7 are input to the control device 9. The control device 9 subtracts the detected pressure of the first absolute pressure sensor 6 from the detected pressure of the second absolute pressure sensor 7 to calculate the in-plane pressure (relative pressure) that is the differential pressure between the two. The control device 9 recognizes that the respiratory device A is attached to the user's head when the amount of change from zero in the intra-body pressure (relative pressure) exceeds a predetermined value, and starts the electric fan 4. The control device 9 repeatedly calculates the intracorporeal pressure (relative pressure) based on the detection signals of the first absolute pressure sensor 6 and the second absolute pressure sensor 7 at predetermined minute time intervals, and the calculated intracorporeal pressure is a predetermined positive pressure. The rotation speed control of the electric fan 4 is repeated so as to be maintained. As a result, the rotational speed of the electric fan 4 increases during inhalation, and the rotational speed of the electric fan 4 decreases during expiration, or the electric fan 4 stops.
When the breathing apparatus A is removed from the user's head, the in-plane pressure (relative pressure) returns to zero. The controller 9 recognizes that the breathing apparatus A has been removed from the user's head when the in-plane pressure has returned to zero and continues for a predetermined time, and stops the electric fan 4.

呼吸装置Ａにおいては呼吸モニター装置８は、面体外圧を検知する第１絶対圧力センサー６と面体内圧を検知する第２絶対圧力センサー７とを備えているので、第２絶対圧力センサー７の検知圧から第１絶対圧力センサー６の検知圧を差し引くことにより、両者の差圧である面体内圧（相対圧）を検知することができる。近年市場に提供され始めた、高精度且つ微小寸法の絶対圧力センサーを、第１絶対圧力センサー６、第２絶対圧力センサー７として使用することにより、特許文献１の呼吸装置で問題となった、ダイヤフラム応答性の製品毎のばらつきに起因する、呼吸に連動した電動ファン制御の製品毎のばらつきを抑制することができる。
第２絶対圧力センサー７が検知した面体内圧と第１絶対圧力センサー６が検知した面体外圧との差圧が所定の正圧になるように、電動ファン４の作動を制御することにより、面体内圧（相対圧）が所定の正圧に維持される。
制御装置９が、第１絶対圧力センサー６と第２絶対圧力センサー７の零点補正を同時に行うことにより、その後の面体内圧（相対圧）を検知することが可能となる。零点補正は、第１絶対圧力センサー６と第２絶対圧力センサー７が同一圧力条件下に在る、面体装着前に行う必要がある。
零点補正スイッチや零点補正釦を面体１に取り付け、零点補正スイッチや零点補正釦を手動で操作して、第１絶対圧力センサー６と第２絶対圧力センサー７の零点補正を同時に行っても良い。
面体１は、使用者の顔面全体を覆う全面形の面体でも良い。 In the respiratory device A, the respiratory monitoring device 8 includes the first absolute pressure sensor 6 that detects the external pressure of the face and the second absolute pressure sensor 7 that detects the pressure in the face, and therefore the detection pressure of the second absolute pressure sensor 7. By subtracting the detection pressure of the first absolute pressure sensor 6 from the above, the in-plane pressure (relative pressure) that is the differential pressure between them can be detected. By using the high-precision and minute absolute pressure sensor, which has begun to be offered to the market in recent years, as the first absolute pressure sensor 6 and the second absolute pressure sensor 7, there has been a problem in the breathing apparatus of Patent Document 1. It is possible to suppress the variation of each product of the electric fan control linked to the respiration, which is caused by the variation of the diaphragm responsiveness from product to product.
By controlling the operation of the electric fan 4 so that the differential pressure between the in-plane pressure detected by the second absolute pressure sensor 7 and the out-of-plane pressure detected by the first absolute pressure sensor 6 becomes a predetermined positive pressure, the in-plane pressure is controlled. (Relative pressure) is maintained at a predetermined positive pressure.
The controller 9 simultaneously detects the zero point correction of the first absolute pressure sensor 6 and the second absolute pressure sensor 7, thereby making it possible to detect the subsequent in-plane pressure (relative pressure). The zero point correction needs to be performed before mounting the face piece in which the first absolute pressure sensor 6 and the second absolute pressure sensor 7 are under the same pressure condition.
A zero point correction switch and a zero point correction button may be attached to the face body 1, and the zero point correction of the first absolute pressure sensor 6 and the second absolute pressure sensor 7 may be performed simultaneously by manually operating the zero point correction switch and the zero point correction button.
The face piece 1 may be a full face face covering the entire face of the user.

呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動が制御される呼吸装置であって、図２に示すように電動ファン４とフィルター５とが給気ホース１０を介して面体１に接続された呼吸装置Ｂにおいては、従来、ＥＰ特許第０１３０７０７号やＥＰ特許第０３５２９３８号に開示されているように、電動ファン４とフィルター５と給気ホース１０とが形成する給気通路１１内の第１所定位置例えば電動ファン４とフィルター５との中間位置の内圧と、第２所定位置例えば電動ファン４の直近下流位置の内圧との差圧をダイアフラムを有する相対圧力センサを用いて検知し、或いは前記給気通路１１内の第３所定位置例えば電動ファン４とフィルター５との中間位置の内圧と前記記給気通路１１の外圧との差圧をダイアフラムを有する相対圧力センサを用いて検知し、検知した差圧に基づいて、呼吸に連動する電動ファン４の作動制御を行っている。上記呼吸装置においても、高精度且つ微小寸法の絶対圧力センサーを用いて検知した、前記第１所定位置と前記第２所定位置の絶対圧力、或いは前記第３所定位置と前記給気通路外の絶対圧力、又は面体内の第４所定位置と面体外の絶対圧力から、２点間の差圧を検知し、当該差圧に基づいて、呼吸に連動する電動ファン４の作動制御をすることにより、ダイヤフラム応答性の製品毎のばらつきに起因する、呼吸に連動した電動ファン制御の製品毎のばらつきを抑制することができる。 A respiration apparatus in which the operation of the electric fan is controlled in conjunction with respiration based on a detection signal of the respiration monitor apparatus, and the electric fan 4 and the filter 5 are connected to the face piece 1 via the air supply hose 10 as shown in FIG. In the breathing apparatus B connected to the air supply passage 11, the air supply passage 11 formed by the electric fan 4, the filter 5, and the air supply hose 10 is conventionally disclosed in EP Patent No. 0130707 and EP Patent No. 05293838. A differential pressure between an internal pressure at an intermediate position between the first predetermined position, for example, the electric fan 4 and the filter 5, and an internal pressure at a second predetermined position, for example, a position immediately downstream of the electric fan 4, is detected using a relative pressure sensor having a diaphragm. Alternatively, a differential pressure between an internal pressure at a third predetermined position in the air supply passage 11, for example, an intermediate position between the electric fan 4 and the filter 5, and an external pressure in the air supply passage 11 can be obtained. It detected using the relative pressure sensor having, based on the detected differential pressure, and controls the operation of the electric fan 4 interlocked with respiration. Also in the respiratory apparatus, the absolute pressure at the first predetermined position and the second predetermined position, or the absolute value outside the third predetermined position and the air supply passage, which is detected using an absolute pressure sensor with a high accuracy and a minute dimension. By detecting the pressure difference between the two points from the pressure, or the fourth predetermined position in the face body and the absolute pressure outside the face body, and controlling the operation of the electric fan 4 linked to respiration based on the pressure difference, It is possible to suppress the variation of each product of the electric fan control linked to the respiration, which is caused by the variation of the diaphragm responsiveness from product to product.

本発明は、顔面の一部又は全部を覆う面体と、面体に取り付けられた、吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備える呼吸装置に広く利用可能である。 The present invention is supplied to a face piece that covers part or all of the face, an intake valve and an exhaust valve attached to the face piece, an electric fan that supplies outside air to the face piece through the intake valve, and a face piece. The present invention can be widely used in a respiration apparatus including a filter that filters outside air, a respiration monitor apparatus, and a control apparatus that controls the operation of an electric fan in conjunction with respiration based on a detection signal of the respiration monitor apparatus.

Ａ、Ｂ　呼吸装置
１　面体
２　吸気弁
３　排気弁
４　電動ファン
５　フィルター
６　第１絶対圧力センサー
７　第２絶対圧力センサー
８　呼吸モニター装置
９　制御装置
１０　給気ホース
１１　給気通路 A, B Respirator 1 Face body 2 Intake valve 3 Exhaust valve 4 Electric fan 5 Filter 6 First absolute pressure sensor 7 Second absolute pressure sensor 8 Respiration monitor device 9 Control device 10 Air supply hose 11 Air supply passage

Claims (4)

顔面の一部又は全部を覆う面体と、面体に取り付けられた、吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備え、呼吸モニター装置は、面体外圧を検知する第１絶対圧力センサーと面体内圧を検知する第２絶対圧力センサーとを備えることを特徴とする呼吸装置。 A face covering a part or all of the face, an intake valve and an exhaust valve attached to the face, an electric fan for supplying outside air to the face through the intake valve, and filtering outside air supplied to the face A respiration monitor device, and a control device that controls the operation of the electric fan in conjunction with respiration based on a detection signal of the respiration monitor device, wherein the respiration monitor device includes a first absolute pressure sensor that detects an extracorporeal pressure; A respiratory apparatus, comprising: a second absolute pressure sensor that detects a pressure in the body. 制御装置は、第２絶対圧力センサーが検知した面体内圧と第１絶対圧力センサーが検知した面体外圧との差圧が所定の正圧になるように、電動ファンの作動を制御することを特徴とする請求項１に記載の呼吸装置。 The control device controls the operation of the electric fan so that a differential pressure between the in-plane pressure detected by the second absolute pressure sensor and the out-of-plane pressure detected by the first absolute pressure sensor becomes a predetermined positive pressure. The respiratory apparatus according to claim 1. 顔面の一部又は全部を覆う面体と、面体に取り付けられた吸気弁と排気弁と、吸気弁を介して前記面体内に外気を供給する電動ファンと、面体に供給される外気を濾過するフィルターと、呼吸モニター装置と、呼吸モニター装置の検知信号に基づき呼吸に連動して電動ファンの作動を制御する制御装置とを備え、電動ファンとフィルターとが給気ホースを介して面体に接続され、呼吸モニター装置は、電動ファンとフィルターと給気ホースとが形成する給気通路内の第１所定位置の内圧を検知する第１絶対圧力センサーと前記給気通路内の第２所定位置の内圧を検知する第２絶対圧力センサーとを備え、又は前記給気通路内の第３所定位置の内圧を検知する第１絶対圧力センサーと記給気通路の外圧を検知する第２絶対圧力センサーとを備え、又は面体内の第４所定位置の内圧を検知する第１絶対圧力センサーと面体外圧を検知する第２絶対圧力センサーとを備えることを特徴とする呼吸装置。 A face that covers part or all of the face, an intake valve and an exhaust valve attached to the face, an electric fan that supplies outside air to the face through the intake valve, and a filter that filters the outside air supplied to the face And a respiratory monitoring device, and a control device that controls the operation of the electric fan in conjunction with respiration based on the detection signal of the respiratory monitoring device, the electric fan and the filter are connected to the face body via an air supply hose, The respiration monitoring device includes a first absolute pressure sensor that detects an internal pressure at a first predetermined position in an air supply passage formed by an electric fan, a filter, and an air supply hose, and an internal pressure at a second predetermined position in the air supply passage. A second absolute pressure sensor for detecting, or a first absolute pressure sensor for detecting an internal pressure at a third predetermined position in the supply passage and a second absolute pressure sensor for detecting an external pressure of the supply passage. Or breathing apparatus, characterized in that it comprises a second absolute pressure sensor for detecting a first absolute pressure sensor and facepiece external pressure for detecting the internal pressure of the fourth predetermined position within the face piece. 第１絶対圧力センサーと第２絶対圧力センサーの零点補正を同時に行う零点補正手段を備えることを特徴とする請求項１乃至３の何れか１項に記載の呼吸装置。 The respiratory apparatus according to any one of claims 1 to 3, further comprising zero point correction means for simultaneously performing zero point correction of the first absolute pressure sensor and the second absolute pressure sensor.
PCT/JP2015/058400 2015-01-27 2015-03-20 Respiration device Ceased WO2016121134A1 (en)

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