JP4530212B2 - Breath analysis device - Google Patents

Breath analysis device Download PDF

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JP4530212B2
JP4530212B2 JP2004280816A JP2004280816A JP4530212B2 JP 4530212 B2 JP4530212 B2 JP 4530212B2 JP 2004280816 A JP2004280816 A JP 2004280816A JP 2004280816 A JP2004280816 A JP 2004280816A JP 4530212 B2 JP4530212 B2 JP 4530212B2
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exhalation
introduction path
communicates
pressure
valve body
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清志 佐川
信一 播摩
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Tanita Corp
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Description

本発明は、ガスセンサを用いて呼気の測定や分析を行う呼気分析装置に関する。   The present invention relates to a breath analysis apparatus that measures and analyzes breath using a gas sensor.

呼気中アルコール濃度の測定や口臭レベルの判定等といった呼気の測定や分析を行うための、例えば金属酸化物半導体で形成された感ガス体を含むガスセンサを用いてなる呼気分析装置が知られている(特許文献1及び2参照。)。斯かる呼気分析装置では、その本体の前面に呼気吹込口が形成されると共に本体の内部にガスセンサが配設されており、呼気吹込口から吹込まれた呼気は、これをガスセンサ配設部に導く呼気導入路を流通してガスセンサ配設部に至り、ガスセンサに接触する。このときのガスセンサの出力に基づいて、呼気の測定や分析が行われる。   An exhalation analyzer using a gas sensor including a gas sensitive body formed of a metal oxide semiconductor, for example, is known for measuring and analyzing exhaled breath such as measurement of alcohol concentration in breath and determination of halitosis level. (See Patent Documents 1 and 2.) In such an exhalation analyzer, an exhalation air inlet is formed on the front surface of the main body, and a gas sensor is disposed inside the main body, and the exhaled air injected from the exhalation air inlet guides this to the gas sensor disposition unit. It circulates through the exhalation introduction path, reaches the gas sensor arrangement part, and contacts the gas sensor. Based on the output of the gas sensor at this time, expiration measurement and analysis are performed.

特開2000−304715号公報JP 2000-304715 A 特開2001−333925号公報JP 2001-333925 A

ガスセンサを用いた従来の呼気分析装置では、ガスセンサに接触する呼気の流量、圧力、角度等によってその出力が変動し、これが呼気の測定や分析の結果にばらつきを生じる要因となっている。即ち、呼気の測定や分析を正確に且つ安定して行うためには、常に一定の勢いで呼気を吹込むことによってガスセンサに接触する呼気の流量等を安定させることが必要で、結果として使用者には、呼気分析装置の使用を煩雑なものと感じさせてしまうことがあった。   In a conventional breath analysis apparatus using a gas sensor, the output fluctuates depending on the flow rate, pressure, angle, and the like of the breath that contacts the gas sensor, and this causes variations in the results of breath measurement and analysis. In other words, in order to accurately and stably measure and analyze exhalation, it is necessary to stabilize the flow rate of exhalation that contacts the gas sensor by always injecting exhalation at a constant rate. In some cases, the use of the breath analysis apparatus may be complicated.

本発明は、使用者が呼気を吹込むに際してその勢いに特別な注意を払わなくても測定や分析にばらつきを生じることのない呼気分析装置を提供することを目的とする。   An object of the present invention is to provide an exhalation analyzer that does not cause variations in measurement and analysis even when the user blows exhalation without paying special attention to the momentum.

本発明の呼気分析装置は、呼気の吹込口と、ガスセンサが配設されたセンサ配設部と、前記吹込口から吹込まれた呼気を前記センサ配設部に導くための呼気導入路とを備えてなる呼気分析装置であって、前記呼気導入路には調圧弁が配設されており、この調圧弁は、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路をその外部に連通させることを特徴とするものである。 An exhalation analyzer of the present invention includes an exhalation inlet, a sensor arrangement portion in which a gas sensor is arranged, and an exhalation introduction path for guiding exhaled air that has been blown from the inhalation port to the sensor arrangement portion. The exhalation analyzer comprises a pressure regulating valve disposed in the exhalation introduction path, and the pressure regulating valve is configured such that when the internal pressure of the exhalation introduction path exceeds a predetermined pressure, the exhalation introduction path is provided outside the exhalation analysis path. It is characterized by making it communicate.

更に、前記調圧弁は、前記呼気導入路とその外部とを連通させる連通口を開閉する弁体と、前記連通口を閉塞する方向に前記弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部とを備えてなるものであることが望ましい。   Furthermore, the pressure regulating valve includes a valve body that opens and closes a communication port that communicates the exhalation introduction path and the outside thereof, and a biasing member that biases the valve body in a direction to close the communication port, The valve body communicates the upstream opening that communicates with the blowing port, the downstream opening that communicates with the sensor arrangement portion with a smaller cross-sectional area than the upstream opening, and the upstream opening and the downstream opening. It is desirable that it is provided with a passage part to be made.

或いは、前記調圧弁は、前記呼気導入路の内圧が第一の所定圧力を上回る場合においてはこの呼気導入路をその外部に連通させ、前記呼気導入路の内圧が第一の所定圧力よりも低い第二の所定圧力を上回る場合においてはこの呼気導入路を前記センサ配設部に連通させるものであることが望ましい。   Alternatively, when the internal pressure of the exhalation introduction path exceeds a first predetermined pressure, the pressure regulating valve causes the exhalation introduction path to communicate with the outside, and the internal pressure of the exhalation introduction path is lower than the first predetermined pressure. In the case where the pressure exceeds the second predetermined pressure, it is desirable that the breath introduction path is communicated with the sensor arrangement portion.

更に、前記調圧弁は、前記呼気導入路に形成された外部との連通口を開閉する弁体と、前記連通口を閉塞する方向に弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部と、この通路部に配設されて前記吹込口から前記センサ配設部への呼気の流通のみを許容する逆止弁とを備えてなることが望ましい。   Further, the pressure regulating valve includes a valve body that opens and closes a communication port with the outside formed in the exhalation introduction path, and a biasing member that biases the valve body in a direction to close the communication port, The valve body communicates the upstream opening that communicates with the blowing port, the downstream opening that communicates with the sensor placement portion with a smaller cross-sectional area than the upstream opening, and the upstream opening and the downstream opening. It is desirable to include a passage portion and a check valve that is disposed in the passage portion and allows only the flow of exhalation from the blowing port to the sensor placement portion.

本発明の呼気分析装置であれば、呼気導入路に調圧弁が配設されているため、使用者が呼気を吹込む勢いに拘らず呼気導入路の内圧は安定し、結果としてガスセンサに接触する呼気の流量、圧力が安定する。従って、使用者が呼気を吹込むに際してその勢いに特別な注意を払わなくても測定や分析にばらつきを生じることのない呼気分析装置とすることができる。   In the exhalation analyzer of the present invention, since the pressure regulating valve is disposed in the exhalation introduction path, the internal pressure of the exhalation introduction path is stabilized regardless of the momentum of the user blowing in exhalation, and as a result, contacts the gas sensor. The flow rate and pressure of exhalation are stabilized. Therefore, it is possible to provide an exhalation analyzer that does not cause variations in measurement and analysis even when the user blows exhalation without paying special attention to the momentum.

ここで、前記調圧弁を、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路をその外部に連通させるものとした場合は、呼気を吹込む勢いが強過ぎるときに余剰となる呼気を呼気導入路の外部に解放するように機能するため、ガスセンサに接触する呼気の流量、圧力を安定させることができる。   Here, if the pressure regulating valve is configured to communicate the exhalation introduction path to the outside when the internal pressure of the exhalation introduction path exceeds a predetermined pressure, it becomes excessive when the momentum for blowing exhalation is too strong. Since it functions to release exhalation to the outside of the exhalation introduction path, the flow rate and pressure of exhalation contacting the gas sensor can be stabilized.

更に、前記調圧弁を、前記呼気導入路とその外部とを連通させる連通口を開閉する弁体と、前記連通口を閉塞する方向に前記弁体を付勢する付勢部材とで構成し、前記弁体を、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部とを備えてなるものとしたときは、ガスセンサに接触する呼気の流量、圧力を安定させるための調圧弁を簡便な構造で実現できると共に、呼気の流通が通路部で絞られることによってセンサ配設部に導入される呼気が整流されるので、ガスセンサに接触する呼気の角度をも安定させることができる。   Further, the pressure regulating valve comprises a valve body that opens and closes a communication port that communicates the exhalation introduction path and the outside thereof, and a biasing member that biases the valve body in a direction to close the communication port, The valve body communicates with the upstream opening that communicates with the inlet, the downstream opening that communicates with the sensor arrangement portion with a smaller cross-sectional area than the upstream opening, and the upstream and downstream openings communicate with each other. When the flow passage is made to include a pressure regulating valve for stabilizing the flow rate and pressure of the exhaled breath contacting the gas sensor with a simple structure, the flow of the exhaled air is restricted by the passage portion. Since the exhaled air introduced into the sensor placement part is rectified, the angle of the exhaled air contacting the gas sensor can also be stabilized.

或いは、前記調圧弁を、前記呼気導入路の内圧が第一の所定圧力を上回る場合においてはこの呼気導入路をその外部に連通させ、前記呼気導入路の内圧が第一の所定圧力よりも低い第二の所定圧力を上回る場合においてはこの呼気導入路を前記センサ配設部に連通させるものとした場合は、呼気を吹込む勢いが強過ぎるときには余剰となる呼気を呼気導入路の外部に解放し、呼気を吹込む勢いが弱過ぎるときにはセンサ配設部への呼気の導入を停止するように機能するため、ガスセンサに接触する呼気の流量、圧力を安定させることができる。   Alternatively, when the internal pressure of the exhalation introduction path exceeds the first predetermined pressure, the exhalation introduction path is connected to the outside of the pressure regulating valve, and the internal pressure of the exhalation introduction path is lower than the first predetermined pressure. In the case where the second predetermined pressure is exceeded, if this exhalation introduction path is communicated with the sensor arrangement part, excess exhalation is released to the outside of the exhalation introduction path when the force for blowing exhalation is too strong However, since the function of stopping the introduction of exhalation into the sensor arrangement portion when the momentum to blow in exhalation is too weak, the flow rate and pressure of exhalation contacting the gas sensor can be stabilized.

更に、前記調圧弁を、前記呼気導入路に形成された外部との連通口を開閉する弁体と、前記連通口を閉塞する方向に弁体を付勢する付勢部材とで構成し、前記弁体を、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部と、この通路部に配設されて前記吹込口から前記センサ配設部への呼気の流通のみを許容する逆止弁とを備えてなるものとしたときは、呼気を吹込む勢いが強過ぎるときにも弱過ぎるときにもガスセンサに接触する呼気の流量、圧力を安定させるための調圧弁を簡便な構造で実現できると共に、呼気の流通が通路部で絞られることによってセンサ配設部に導入される呼気が整流されるので、ガスセンサに接触する呼気の角度をも安定させることができる。   Furthermore, the pressure regulating valve comprises a valve body that opens and closes a communication port with the outside formed in the exhalation introduction path, and a biasing member that biases the valve body in a direction to close the communication port, An upstream opening communicating with the blowing port, a downstream opening communicating with the sensor arrangement portion with a smaller cross-sectional area than the upstream opening, and the upstream opening and the downstream opening are communicated with each other. When a passage portion and a check valve disposed in the passage portion and permitting only the flow of exhalation from the blowing port to the sensor placement portion are provided, the momentum for blowing in exhalation is obtained. Regardless of whether it is too strong or too weak, it is possible to realize a pressure regulating valve for stabilizing the flow rate and pressure of the exhaled air that contacts the gas sensor with a simple structure, and the sensor arrangement part by restricting the flow of exhaled air at the passage part Since the exhaled breath introduced into the rectifier is rectified, the gas sensor The angle of the breath in contact can be stabilized.

本発明の呼気分析装置は、呼気の吹込口と、ガスセンサが配設されたセンサ配設部と、前記吹込口から吹込まれた呼気を前記センサ配設部に導くための呼気導入路とを備えてなる呼気分析装置において、前記呼気導入路に調圧弁を配設する。   An exhalation analyzer of the present invention includes an exhalation inlet, a sensor arrangement portion in which a gas sensor is arranged, and an exhalation introduction path for guiding exhaled air that has been blown from the inhalation port to the sensor arrangement portion. In the exhalation analyzer, a pressure regulating valve is disposed in the exhalation introduction path.

ここで、前記調圧弁は、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路をその外部に連通させるものであることが望ましい。   Here, it is desirable that the pressure regulating valve communicates the exhalation introduction path to the outside when the internal pressure of the exhalation introduction path exceeds a predetermined pressure.

更に、前記調圧弁は、前記呼気導入路とその外部とを連通させる連通口を開閉する弁体と、前記連通口を閉塞する方向に前記弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部とを備えてなるものであることが望ましい。   Furthermore, the pressure regulating valve includes a valve body that opens and closes a communication port that communicates the exhalation introduction path and the outside thereof, and a biasing member that biases the valve body in a direction to close the communication port, The valve body communicates the upstream opening that communicates with the blowing port, the downstream opening that communicates with the sensor arrangement portion with a smaller cross-sectional area than the upstream opening, and the upstream opening and the downstream opening. It is desirable that it is provided with a passage part to be made.

或いは、前記調圧弁は、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路を前記センサ配設部に連通させるものであることが望ましい。   Alternatively, it is desirable that the pressure regulating valve communicates the exhalation introduction path with the sensor arrangement portion when the internal pressure of the exhalation introduction path exceeds a predetermined pressure.

更に、前記調圧弁は、前記吹込口から前記センサ配設部への呼気の流通のみを許容する逆止弁であることが望ましい。   Furthermore, it is desirable that the pressure regulating valve is a check valve that allows only the flow of exhaled air from the blowing port to the sensor placement portion.

或いは、前記調圧弁は、前記呼気導入路の内圧が第一の所定圧力を上回る場合においてはこの呼気導入路をその外部に連通させ、前記呼気導入路の内圧が第一の所定圧力よりも低い第二の所定圧力を上回る場合においてはこの呼気導入路を前記センサ配設部に連通させるものであることが望ましい。   Alternatively, when the internal pressure of the exhalation introduction path exceeds a first predetermined pressure, the pressure regulating valve causes the exhalation introduction path to communicate with the outside, and the internal pressure of the exhalation introduction path is lower than the first predetermined pressure. In the case where the pressure exceeds the second predetermined pressure, it is desirable that the breath introduction path is communicated with the sensor arrangement portion.

更に、前記調圧弁は、前記呼気導入路に形成された外部との連通口を開閉する弁体と、前記連通口を閉塞する方向に弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部と、この通路部に配設されて前記吹込口から前記センサ配設部への呼気の流通のみを許容する逆止弁とを備えてなることが望ましい。   Further, the pressure regulating valve includes a valve body that opens and closes a communication port with the outside formed in the exhalation introduction path, and a biasing member that biases the valve body in a direction to close the communication port, The valve body communicates the upstream opening that communicates with the blowing port, the downstream opening that communicates with the sensor placement portion with a smaller cross-sectional area than the upstream opening, and the upstream opening and the downstream opening. It is desirable to include a passage portion and a check valve that is disposed in the passage portion and allows only the flow of exhalation from the blowing port to the sensor placement portion.

以下、本発明の第一実施例を、図1及び図2を参照して説明する。図1は、本発明による呼気分析装置1の概略外観図であって、図1(a)はその正面図、図1(b)はその背面図である。図2は、本発明の第一実施例における図1のA−A断面を概略的に表す図であって、図2(a)は呼気の吹込みが適正に行われている状態を表し、図2(b)は呼気の吹込みが強過ぎる状態を表している。尚、図2(a)、(b)において、図中の矢印は呼気の流れを表している。   A first embodiment of the present invention will be described below with reference to FIGS. 1A and 1B are schematic external views of a breath analysis apparatus 1 according to the present invention. FIG. 1A is a front view thereof, and FIG. 1B is a rear view thereof. FIG. 2 is a diagram schematically showing the AA cross section of FIG. 1 in the first embodiment of the present invention, and FIG. 2 (a) shows a state in which exhalation is properly performed, FIG. 2 (b) shows a state where exhalation is too strong. In FIGS. 2A and 2B, the arrows in the figure indicate the flow of exhalation.

図1に示すように、呼気分析装置1は、その本体10の正面に、呼気の吹込口11が形成されると共に、表示画面20と、操作スイッチ30とが配設されている。また、その背面には、呼気の吹抜口12が形成されている。操作スイッチ30の押下により電源が投入され、その状態で吹込口11に呼気を吹込むと、本体10の内部に配設されたガスセンサ131に呼気が接触し、呼気中アルコール濃度の測定等が実行され、その結果が表示画面20に表示されるものである。ガスセンサ131に接触した呼気は、吹抜口12(121)から排気される。   As shown in FIG. 1, the breath analysis apparatus 1 has a breathing outlet 11 formed in the front of a main body 10, and a display screen 20 and an operation switch 30. An exhalation vent 12 is formed on the rear surface. When the operation switch 30 is pressed to turn on the power, and when exhaled air is blown into the air inlet 11, the exhaled gas comes into contact with the gas sensor 131 disposed inside the main body 10, and the alcohol concentration in the exhaled breath is measured. The result is displayed on the display screen 20. Exhaled air that has come into contact with the gas sensor 131 is exhausted from the air outlet 12 (121).

図2に示すように、本体10の内部には、上下方向に対向して配置された一対の内壁101、101によってセンサ配設部13が区画形成されており、このセンサ配設部13にガスセンサ131が配設されている。夫々の内壁101は、本体10の正面側の外壁100aに向かって延出する内壁101aと、本体10の背面側の外壁100bに開口された吹抜口12に向かって延出する内壁101bと、これら内壁101a、101bに直交するリブ状の内壁101cとを備えており、図示しない位置において本体10の外壁に固着されている。   As shown in FIG. 2, a sensor disposing portion 13 is defined in a body 10 by a pair of inner walls 101, 101 disposed facing each other in the vertical direction. The sensor disposing portion 13 includes a gas sensor. 131 is disposed. Each of the inner walls 101 includes an inner wall 101a extending toward the outer wall 100a on the front side of the main body 10, an inner wall 101b extending toward the blowout opening 12 opened in the outer wall 100b on the rear side of the main body 10, and the like. A rib-shaped inner wall 101c orthogonal to the inner walls 101a and 101b, and is fixed to the outer wall of the main body 10 at a position not shown.

ここで、夫々の内壁101aは、外壁100aに向かって延出しつつもこれに到達せず、従って内壁101aの先端部と外壁100aの内側壁面との間に間隙が形成されている。詳しくは後述するように、この間隙が呼気導入路14とその外部15とを連通させる連通口16を構成するものである。一方、夫々の内壁101bは、外壁100bに開口された吹抜口12に向かって延出してその先端部が外壁101bの外側壁面と略同一の平面に到達し、以って吹抜口12を3つの吹抜口121、122、123に区画している。   Here, each of the inner walls 101a extends toward the outer wall 100a but does not reach the inner wall 101a. Therefore, a gap is formed between the tip of the inner wall 101a and the inner wall surface of the outer wall 100a. As will be described in detail later, this gap constitutes a communication port 16 that allows the exhalation introduction path 14 to communicate with the outside 15 thereof. On the other hand, each inner wall 101b extends toward the blowout opening 12 opened in the outer wall 100b, and its tip reaches a plane substantially the same as the outer wall surface of the outer wall 101b. The air outlets 121, 122, and 123 are partitioned.

また、内壁101aと内壁101cとで区画される空間には、弁体171と付勢部材172とで構成される調圧弁17が、呼気の流通方向に摺動可能に配設されている。   In addition, in the space defined by the inner wall 101a and the inner wall 101c, a pressure regulating valve 17 including a valve body 171 and an urging member 172 is disposed so as to be slidable in the flow direction of exhaled air.

弁体171は、吹込口11に連通する上流開口部173を区画する上流側壁171aと、上流開口部173よりも小さな断面積でセンサ配設部13に連通する下流開口部174を区画する下流側壁171bと、上流側壁171aと下流側壁171bとを接続する接続壁171cとによって構成された中空体である。そして、これら上流側壁171aと下流側壁171bと接続壁171cとで囲繞されて上流開口部173と下流開口部174とを連通させる通路部175が、吹込口11から吹込まれた呼気をセンサ配設部13に導くための呼気導入路14を兼ねる構成となっている。また、接続壁171cは、通路部175の軸方向に対して略直交して通路部175に段差を形成し、これによって通路部175が絞られている。また、後述するように、接続壁171cの内側壁面には通路部175(呼気導入路14)の内圧が作用し、その外側壁面には付勢部材172の付勢力が作用する。   The valve body 171 includes an upstream side wall 171 a that defines an upstream opening 173 that communicates with the air inlet 11, and a downstream side wall that defines a downstream opening 174 that communicates with the sensor disposition unit 13 with a smaller cross-sectional area than the upstream opening 173. It is a hollow body constituted by 171b and a connection wall 171c connecting the upstream side wall 171a and the downstream side wall 171b. A passage portion 175 that is surrounded by the upstream side wall 171a, the downstream side wall 171b, and the connection wall 171c and connects the upstream opening 173 and the downstream opening 174 communicates the exhaled air blown from the blowing port 11 with the sensor arrangement portion. 13 also serves as an exhalation introduction path 14 for guiding the air to 13. Further, the connection wall 171c forms a step in the passage portion 175 so as to be substantially orthogonal to the axial direction of the passage portion 175, whereby the passage portion 175 is narrowed. Further, as will be described later, the internal pressure of the passage portion 175 (expiratory introduction path 14) acts on the inner wall surface of the connection wall 171c, and the urging force of the urging member 172 acts on the outer wall surface thereof.

付勢部材172は、一般的なコイルスプリングであって、本体10の内壁101a及び内壁101cと弁体171の下流側壁171b及び接続壁171cとで区画される夫々の空間に、内壁101c及び接続壁171cをバネ座として配設されている。この付勢部材172の付勢力によって弁体171は外壁100aに向かって常時付勢され、自然状態においては上流側壁171aの先端部が外壁100aの内側壁面(吹込口11の開口周辺部)に当接させられる。この結果、内壁101aの先端部と外壁100aの内側壁面との間の間隙たる連通口16は、上流側壁171aによって閉塞されるものである。   The urging member 172 is a general coil spring, and the inner wall 101c and the connection wall are formed in respective spaces defined by the inner wall 101a and the inner wall 101c of the main body 10 and the downstream side wall 171b and the connection wall 171c of the valve body 171. 171c is provided as a spring seat. Due to the urging force of the urging member 172, the valve body 171 is constantly urged toward the outer wall 100a, and in the natural state, the tip of the upstream side wall 171a contacts the inner wall surface of the outer wall 100a (periphery of the opening of the blowing port 11). Touched. As a result, the communication port 16 serving as a gap between the tip of the inner wall 101a and the inner wall surface of the outer wall 100a is closed by the upstream side wall 171a.

そして、本体10の内部であって内壁101、101で区画されるセンサ配設部13等の外側に位置する空間15は、通常は弁体171の上流側壁171aによって閉塞される連通口16を介して吹込口11及び呼気導入路14に連通すると共に、外壁100bと内壁101bの先端部とで区画される吹抜口122、123を介して本体10の外部に連通している。   The space 15 located inside the main body 10 and outside the sensor disposing portion 13 or the like partitioned by the inner walls 101 and 101 is usually connected through the communication port 16 that is closed by the upstream side wall 171a of the valve body 171. And communicates with the outside of the main body 10 through blowout ports 122 and 123 defined by the outer wall 100b and the tip of the inner wall 101b.

上述の如き構成の呼気分析装置1において、その使用者が吹込口11から呼気を吹込んだ場合の調圧弁17の動作及び呼気の流れは、次のようになる。   In the breath analysis apparatus 1 configured as described above, the operation of the pressure regulating valve 17 and the flow of breath when the user blows breath through the blow-in port 11 are as follows.

先ず、呼気を吹込む勢いが強過ぎることなく、従って呼気導入路14の内圧が付勢部材172の付勢力(即ち、コイルスプリングのバネ定数)で定まる所定圧力を下回っている場合においては、図2(a)に示す如く、弁体171は付勢部材172に付勢されて連通口16を閉塞したままとなる。従って、呼気はその全てがセンサ配設部13に導入されてガスセンサ131に接触し、その後吹抜口121から排気される。   First, when the momentum to blow in exhalation is not too strong, and therefore the internal pressure of the exhalation introduction path 14 is below a predetermined pressure determined by the energizing force of the energizing member 172 (that is, the spring constant of the coil spring), As shown in FIG. 2A, the valve body 171 is urged by the urging member 172 and the communication port 16 remains closed. Therefore, all of the exhaled air is introduced into the sensor disposition unit 13 and comes into contact with the gas sensor 131, and is then exhausted from the air outlet 121.

一方、呼気を吹込む勢いが強過ぎ、従って呼気導入路14の内圧が上記所定圧力を上回った場合においては、斯かる内圧は接続壁171cの内側壁面に作用し、図2(b)に示す如く、弁体171は呼気導入路14の軸方向に移動して連通口16を開口する。従って、吹込まれた呼気のうち余剰となる分が連通口16を介して呼気導入路14の外部の空間15に解放され、これにより適正化された流量、圧力の呼気がセンサ配設部13に導入されるので、ガスセンサ131に接触する呼気の流量、圧力は安定したものとなる。ここで、弁体171の移動量(即ち、連通口16の開口面積)は、呼気導入路14の内圧(即ち、呼気の余剰流量)に比例して広がるので、センサ配設部13に導入される呼気の流量、圧力は、極めて安定するものである。尚、空間15に解放された呼気は、吹抜口122、123から排気される。   On the other hand, when the momentum to blow in exhalation is too strong, and the internal pressure of the exhalation introduction path 14 exceeds the predetermined pressure, the internal pressure acts on the inner wall surface of the connection wall 171c, as shown in FIG. Thus, the valve body 171 moves in the axial direction of the exhalation introduction path 14 to open the communication port 16. Accordingly, an excess portion of the exhaled exhaled air is released to the space 15 outside the exhalation introduction path 14 through the communication port 16, and thus the exhaled gas having an optimized flow rate and pressure is supplied to the sensor placement unit 13. Since it is introduced, the flow rate and pressure of the exhaled air that contacts the gas sensor 131 become stable. Here, the amount of movement of the valve body 171 (that is, the opening area of the communication port 16) increases in proportion to the internal pressure of the exhalation introduction path 14 (that is, the surplus flow rate of exhalation), and thus is introduced into the sensor disposition unit 13. The flow rate and pressure of exhaled breath are extremely stable. The exhaled air released into the space 15 is exhausted from the air outlets 122 and 123.

また、上記何れの場合においても、呼気の流通は通路部175で絞られることによって整流されてセンサ配設部13に導入される。従って、ガスセンサ131に接触する呼気の角度も安定したものとなる。   In any of the above cases, the flow of exhalation is rectified by being throttled in the passage portion 175 and introduced into the sensor arrangement portion 13. Therefore, the angle of exhalation contacting the gas sensor 131 is also stable.

次に、本発明の第二実施例を、図3を参照して説明する。図3は、本発明の第二実施例における図1のA−A断面を概略的に表す図であって、図3(a)は呼気の吹込みが弱過ぎる状態を表し、図2(b)は呼気の吹込みが適正に行われている状態を表している。図3(a)、(b)においても、図中の矢印は呼気の流れを表している。   Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a diagram schematically showing the AA cross section of FIG. 1 in the second embodiment of the present invention, and FIG. 3 (a) shows a state where the inhalation of breath is too weak, and FIG. ) Represents a state where exhalation is properly performed. 3 (a) and 3 (b), the arrows in the figure indicate the flow of exhalation.

第二実施例が第一実施例と相違する点は、呼気導入路14の内圧が所定圧力を上回る場合にこの呼気導入路14とセンサ配設部13とを連通させる調圧弁18を設けた点のみである。従って、同一の構成については同一の符号を付し、説明は割愛する。   The second embodiment is different from the first embodiment in that a pressure regulating valve 18 is provided for communicating the exhalation introduction path 14 and the sensor arrangement portion 13 when the internal pressure of the exhalation introduction path 14 exceeds a predetermined pressure. Only. Therefore, the same components are denoted by the same reference numerals, and description thereof is omitted.

図3に示すように、呼気導入路14として機能する弁体171の通路部175には、調圧弁18が配設されている。調圧弁18は、相対向する一組の可撓体(板バネ)181、181及び基部182、182からなる常閉型の逆止弁(リード弁)である。弁体171の接続壁171cに固着された夫々の基部182から夫々の可撓体181が延出し、自然状態においてはその撓み力によって各可撓体181、181の先端部が互いに当接して呼気導入路14とセンサ配設部13との間の連通を遮断している。   As shown in FIG. 3, a pressure regulating valve 18 is disposed in the passage portion 175 of the valve body 171 that functions as the exhalation introduction path 14. The pressure regulating valve 18 is a normally closed check valve (reed valve) including a pair of opposing flexible bodies (plate springs) 181 and 181 and base portions 182 and 182. The respective flexible bodies 181 extend from the respective base portions 182 fixed to the connection wall 171c of the valve body 171, and in the natural state, the distal ends of the respective flexible bodies 181 and 181 are brought into contact with each other by the bending force. The communication between the introduction path 14 and the sensor arrangement portion 13 is blocked.

呼気導入路14に調圧弁18が配設された呼気分析装置1において、その使用者が吹込口11から呼気を吹込んだ場合の調圧弁18の動作及び呼気の流れは、次のようになる。   In the exhalation analyzer 1 in which the pressure regulating valve 18 is disposed in the exhalation introduction path 14, the operation of the pressure regulating valve 18 and the flow of exhalation when the user blows in exhaled air from the blowing port 11 are as follows. .

先ず、呼気を吹込む勢いが弱過ぎ、従って呼気導入路14の内圧が可撓体181の撓み力(即ち、板バネのバネ定数)で定まる所定圧力を下回っている場合においては、図3(a)に示す如く、可撓体181は呼気導入路14を閉塞したままとなる。従って、適正な流量、圧力に満たない呼気はセンサ配設部13に導入されず、ガスセンサ131に接触することもない。尚、可撓体181の撓み力は付勢部材172の付勢力よりも弱く設定されており、従って上記の所定圧力は、第一実施例において説明した所定圧力を第一の所定圧力とした場合、この第一の所定圧力よりも低い第二の所定圧力ということができる。   First, in the case where the momentum to blow in exhalation is too weak, and therefore the internal pressure of the exhalation introduction path 14 is below a predetermined pressure determined by the bending force of the flexible body 181 (ie, the spring constant of the leaf spring), FIG. As shown in a), the flexible body 181 remains closed in the exhalation introduction path 14. Accordingly, exhaled air that does not satisfy the proper flow rate and pressure is not introduced into the sensor disposition unit 13 and does not contact the gas sensor 131. The bending force of the flexible body 181 is set to be weaker than the urging force of the urging member 172. Therefore, the predetermined pressure described above is the case where the predetermined pressure described in the first embodiment is the first predetermined pressure. It can be said that the second predetermined pressure is lower than the first predetermined pressure.

一方、呼気を吹込む勢いが弱過ぎることなく、従って呼気導入路14の内圧が上記第二の所定圧力を上回った場合においては、図3(b)に示す如く、可撓体181はその先端部が互いに離間して呼気導入路14をセンサ配設部13に連通させる。従って、吹込まれた適正な流量、圧力の呼気がセンサ配設部13に導入されるので、ガスセンサ131に接触する呼気の流量、圧力は安定したものとなる。   On the other hand, when the exhalation-inspiring momentum is not too weak, and therefore the internal pressure of the exhalation-introducing channel 14 exceeds the second predetermined pressure, the flexible body 181 has its tip as shown in FIG. The parts are separated from each other, and the exhalation introduction path 14 is communicated with the sensor arrangement part 13. Therefore, since the expiratory flow having an appropriate flow rate and pressure is introduced into the sensor placement unit 13, the expiratory flow rate and pressure in contact with the gas sensor 131 become stable.

尚、呼気を吹込む勢いが更に強くなって呼気導入路14の内圧が更に上昇し、上記第一の所定圧力をも上回った場合においては、調圧弁18が呼気導入路14をセンサ配設部13に連通させたまま、第一実施例(図2(b))と同様に調圧弁17が連通口16を開口して余剰となる呼気は空間15に解放される。この結果、センサ配設部13に導入され、ガスセンサ131に接触する呼気の流量、圧力は、安定したものとなる。もちろん、通路部175の絞りによって呼気が整流されてガスセンサ131への接触角度が安定する点も、第一実施例に同じである。   In addition, when the momentum which blows in exhalation becomes still stronger and the internal pressure of the exhalation introduction path 14 further rises and exceeds the first predetermined pressure, the pressure regulating valve 18 moves the exhalation introduction path 14 through the sensor arrangement portion. As in the first embodiment (FIG. 2B), the pressure regulating valve 17 opens the communication port 16 and the excess exhaled air is released to the space 15 while being in communication with the air. As a result, the flow rate and pressure of exhaled air introduced into the sensor placement unit 13 and in contact with the gas sensor 131 are stabilized. Of course, the point that the exhaled air is rectified by the restriction of the passage portion 175 and the contact angle to the gas sensor 131 is stabilized is the same as in the first embodiment.

上述のように、第二実施例においては、第一実施例の調圧弁17の内部に調圧弁18を組込んだので、簡便な構造で調圧弁による効果を得ることが可能となっている。   As described above, in the second embodiment, since the pressure regulating valve 18 is incorporated in the pressure regulating valve 17 of the first embodiment, it is possible to obtain the effect of the pressure regulating valve with a simple structure.

以上、本発明及びその実施の形態について詳述してきたが、本発明は、以上の説明に限定されることなく、特許請求の範囲に記載した構成を備える限りにおいて、様々な変形が可能である。例えば、弁体171の接続壁171cは、通路部175に対して必ずしも直交する必要はなく、テーパ状であっても良く、或いは弁体171自体を漏斗状に形成しても良い。また、付勢部材172はコイルスプリングに限らず、弁体171に対して必要な付勢力を得られるものであれば良く、磁力や電磁力等を利用することも考えられる。また、調圧弁17はそれ自体が呼気導入路14の一部を構成するような中空体でなくとも良く、固定された呼気導入路に形成された連通口を開閉し得る常閉型の弁であれば足りる。調圧弁18もまた、調圧弁17とは独立して配設しても良く、或いは調圧弁18のみを備える構成であっても良い。更にまた、呼気の吹込口を本体から延出されたチューブ等で構成した呼気分析装置にも適用可能である。   The present invention and the embodiments thereof have been described in detail above, but the present invention is not limited to the above description, and various modifications are possible as long as the configuration described in the claims is provided. . For example, the connection wall 171c of the valve body 171 does not necessarily need to be orthogonal to the passage portion 175, and may be tapered, or the valve body 171 itself may be formed in a funnel shape. Further, the urging member 172 is not limited to a coil spring, and any member that can obtain a necessary urging force with respect to the valve body 171 may be used. It is also conceivable to use a magnetic force or an electromagnetic force. Further, the pressure regulating valve 17 does not have to be a hollow body that itself constitutes a part of the exhalation introduction path 14, and is a normally closed valve that can open and close a communication port formed in the fixed exhalation introduction path. If there is enough. The pressure regulating valve 18 may also be disposed independently of the pressure regulating valve 17 or may be configured to include only the pressure regulating valve 18. Furthermore, the present invention can also be applied to an exhalation analyzer in which an exhalation inlet is formed of a tube or the like extended from the main body.

本発明による呼気分析装置1の概略外観図。1 is a schematic external view of a breath analysis apparatus 1 according to the present invention. 第一実施例における図1のA−A断面を概略的に表す図。The figure which represents roughly the AA cross section of FIG. 1 in a 1st Example. 第二実施例における図1のA−A断面を概略的に表す図。The figure which represents roughly the AA cross section of FIG. 1 in a 2nd Example.

符号の説明Explanation of symbols

1 呼気分析装置
10 本体
100a、100b 外壁
101、101a、101b、101c 内壁
11 吹込口
12、121、122、123 吹抜口
13 センサ配設部
131 ガスセンサ
14 呼気導入路
15 空間
16 連通口
17 調圧弁
171 弁体
171a 上流側壁
171b 下流側壁
171c 接続壁
172 付勢部材
173 上流開口部
174 下流開口部
175 通路部
18 調圧弁
181 可撓体
182 基部
20 表示画面
30 操作スイッチ
DESCRIPTION OF SYMBOLS 1 Exhalation analyzer 10 Main body 100a, 100b Outer wall 101, 101a, 101b, 101c Inner wall 11 Blowing inlet 12, 121, 122, 123 Blowout opening 13 Sensor arrangement part 131 Gas sensor 14 Exhalation introduction path 15 Space 16 Communication port 17 Pressure regulation valve 171 Valve body 171a Upstream side wall 171b Downstream side wall 171c Connection wall 172 Energizing member 173 Upstream opening 174 Downstream opening 175 Path portion 18 Pressure regulating valve 181 Flexible body 182 Base 20 Display screen 30 Operation switch

Claims (2)

呼気の吹込口と、ガスセンサが配設されたセンサ配設部と、前記吹込口から吹込まれた呼気を前記センサ配設部に導くための呼気導入路とを備えてなる呼気分析装置であって、前記呼気導入路には調圧弁が配設されており、この調圧弁は、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路をその外部に連通させるもので、前記呼気導入路とその外部とを連通させる連通口を開閉する弁体と、前記連通口を閉塞する方向に前記弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部とを備えてなることを特徴とする呼気分析装置。 An exhalation analyzer comprising an exhalation inlet, a sensor arrangement portion in which a gas sensor is arranged, and an exhalation introduction path for guiding exhaled air blown from the inflow port to the sensor arrangement portion. the and exhalation introduced into the passage the pressure regulating valve is disposed, the pressure regulating valve, in which the internal pressure of the breath introduction path communicates the breath introduction path to the outside in the case above a predetermined pressure, the exhalation introduced A valve body that opens and closes a communication port that communicates the path with the outside thereof, and a biasing member that biases the valve body in a direction to close the communication port, and the valve body communicates with the blowing port An upstream opening, a downstream opening communicating with the sensor arrangement portion with a smaller cross-sectional area than the upstream opening, and a passage portion communicating the upstream opening and the downstream opening. A breath analysis device. 呼気の吹込口と、ガスセンサが配設されたセンサ配設部と、前記吹込口から吹込まれた呼気を前記センサ配設部に導くための呼気導入路とを備えてなる呼気分析装置であって、前記呼気導入路には調圧弁が配設されており、この調圧弁は、前記呼気導入路の内圧が所定圧力を上回る場合においてこの呼気導入路をその外部に連通させるもので、前記呼気導入路の内圧が第一の所定圧力を上回る場合においてはこの呼気導入路をその外部に連通させ、前記呼気導入路の内圧が第一の所定圧力よりも低い第二の所定圧力を上回る場合においてはこの呼気導入路を前記センサ配設部に連通させるもので、前記呼気導入路に形成された外部との連通口を開閉する弁体と、前記連通口を閉塞する方向に弁体を付勢する付勢部材とで構成され、前記弁体は、前記吹込口に連通する上流開口部と、この上流開口部よりも小さな断面積で前記センサ配設部に連通する下流開口部と、これら上流開口部と下流開口部とを連通させる通路部と、この通路部に配設されて前記吹込口から前記センサ配設部への呼気の流通のみを許容する逆止弁とを備えてなることを特徴とする呼気分析装置。An exhalation analyzer comprising an exhalation inlet, a sensor arrangement portion in which a gas sensor is arranged, and an exhalation introduction path for guiding exhaled air blown from the inflow port to the sensor arrangement portion. In addition, a pressure regulating valve is disposed in the exhalation introduction path, and the pressure regulating valve communicates the exhalation introduction path to the outside when the internal pressure of the exhalation introduction path exceeds a predetermined pressure. When the internal pressure of the passage exceeds the first predetermined pressure, this exhalation introduction passage is communicated with the outside, and when the internal pressure of the exhalation introduction passage exceeds a second predetermined pressure lower than the first predetermined pressure, The exhalation introduction path is communicated with the sensor arrangement portion, and a valve body that opens and closes a communication port formed in the exhalation introduction path and biases the valve body in a direction to close the communication opening. An urging member, and the valve body is An upstream opening that communicates with the inlet, a downstream opening that communicates with the sensor placement section with a smaller cross-sectional area than the upstream opening, and a passage that communicates the upstream opening and the downstream opening, An exhalation analyzer comprising: a check valve disposed in the passage portion and allowing only a flow of exhalation from the inlet to the sensor disposition portion.
JP2004280816A 2004-09-28 2004-09-28 Breath analysis device Expired - Fee Related JP4530212B2 (en)

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JP5299644B2 (en) * 2010-01-14 2013-09-25 株式会社デンソー Alcohol detector
JP4688967B1 (en) * 2010-07-26 2011-05-25 東海電子株式会社 Breath alcohol meter
SE536784C2 (en) 2012-08-24 2014-08-05 Automotive Coalition For Traffic Safety Inc Exhalation test system
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KR102277347B1 (en) * 2014-06-19 2021-07-14 단포스 아이엑스에이 에이/에스 Probe for gas sensor with gas split sample gas flow
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US11104227B2 (en) 2016-03-24 2021-08-31 Automotive Coalition For Traffic Safety, Inc. Sensor system for passive in-vehicle breath alcohol estimation
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