JP2007071604A - Gas detector - Google Patents

Gas detector Download PDF

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JP2007071604A
JP2007071604A JP2005256965A JP2005256965A JP2007071604A JP 2007071604 A JP2007071604 A JP 2007071604A JP 2005256965 A JP2005256965 A JP 2005256965A JP 2005256965 A JP2005256965 A JP 2005256965A JP 2007071604 A JP2007071604 A JP 2007071604A
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gas
case
bracket
detection device
plate
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JP4728071B2 (en
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Takamasa Osawa
敬正 大澤
Kazuto Hirai
一人 平井
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Niterra Co Ltd
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NGK Spark Plug Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas detector which well ensures the strength of a bracket even when a gas ventilating hole for guiding a gas to be measured to the gas introducing port of a case is provided to the bracket, and is miniaturized as compared with a conventional gas detector. <P>SOLUTION: The bracket part 7 of a gas sensor 100 has a reinforcing part 75, which is constituted so as to have a thick wall, between a plate piece part 71 and a case main body part 6. The air passing through the gas ventilating hole 80 opened to the reinforcing part 75 is taken in a case part 2 from the edge end part 56 of the expanded part 40 protruded from the lid part 3 on the back side of the case main body part 6 to follow the flow channel AF discharged from a gas exhaust port 54 and, at this time, a specific gas is detected. Since the gas ventilating hole 80 is opened so as to leave the rib 77 of the reinforcing part 75, the strength of the reinforcing part 75 is not lowered. Further, the ventilating hole 80 is provided to the reinforcing part 75 and, since the constitution for the gas passing hole is not separately provided, the gas detector 1 is miniaturized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、測定対象気体中の特定ガスの濃度変化を検出するガスセンサを備えたガス検出装置に関するものである。   The present invention relates to a gas detection apparatus including a gas sensor that detects a change in concentration of a specific gas in a measurement target gas.

従来、ケース内にガスセンサを内蔵し、そのケース内に測定対象となる気体を流通させて、気体中の特定ガスの濃度変化を検出するガス検出装置が知られている。例えば車両用のガス検出装置は、自動車のフロントグリルの内側などに取り付けられ、フロントグリルを介し車体内に入り込む空気を空気取入口からケース内に取り込み、ケース内の流路を通過させつつ空気中の特定ガスの濃度変化の検出を行い、空気排出口からケース外に排出している。   2. Description of the Related Art Conventionally, there has been known a gas detection device in which a gas sensor is built in a case, a gas to be measured is circulated in the case, and a concentration change of a specific gas in the gas is detected. For example, a gas detection device for a vehicle is attached to the inside of a front grill of an automobile, etc., and takes air that enters the vehicle body through the front grill into the case from the air intake and passes through the flow path in the case. Changes in the concentration of the specified gas are detected and discharged from the air outlet to the outside of the case.

このようなガス検出装置を自動車に取り付けるため、ガス検出装置のケースには、取り付けねじ孔が開口された板状のブラケットが設けられている。ガス検出装置はフロントグリルの内側（背面側）に取り付けられるため、ブラケットはガス検出装置の前面側、すなわち空気の流通方向上流側に設けられている。また、ガス検出装置の防水効果を高めるためなどの理由から、ケースの背面側、すなわち空気の流通方向下流側に、空気取入口および空気排出口が設けられている（例えば、特許文献１参照。）。   In order to attach such a gas detection device to an automobile, a plate-like bracket having an attachment screw hole is provided in the case of the gas detection device. Since the gas detection device is attached to the inner side (rear side) of the front grille, the bracket is provided on the front side of the gas detection device, that is, on the upstream side in the air flow direction. For reasons such as enhancing the waterproofing effect of the gas detection device, an air inlet and an air outlet are provided on the back side of the case, that is, on the downstream side in the air flow direction (see, for example, Patent Document 1). ).

ところで特許文献１では、ケースの外側面とブラケットとの間にブラケット接続部を設け、このブラケット接続部にケースの前面側と背面側との間を貫通する貫通孔（通気孔）を開口している。この貫通孔は、ケースの空気取入口に対し空気の流通方向上流側に配置されており、空気を空気取入口へと導き、ケースの流路内の空気の交換を円滑に促している。   By the way, in Patent Document 1, a bracket connection portion is provided between the outer surface of the case and the bracket, and a through-hole (vent hole) penetrating between the front side and the back side of the case is opened in the bracket connection portion. Yes. The through-hole is disposed upstream of the air intake port of the case in the air flow direction, guides air to the air intake port, and facilitates the exchange of air in the flow path of the case.

近年、自動車の構成部品には配置の自由度が求められることから、ガス検出装置に対する小型化への要望も高まっている。そこで特許文献１に記載のガス検出装置の小型化を図る場合、例えば空気取入口をケースの前面側に設け、空気取入口へと向かう空気の流通をブラケットに阻害されない構成としたうえでブラケット接続部を廃し、ケースの外側面に直接板状のブラケットを連結させる方法等が考えられる。
特開２００３−３４１３４８号公報 In recent years, since the degree of freedom of arrangement is required for automobile component parts, there is an increasing demand for miniaturization of gas detection devices. Therefore, when downsizing the gas detection device described in Patent Document 1, for example, an air inlet is provided on the front side of the case, and the bracket connection is made after the air flow toward the air inlet is not obstructed by the bracket. A method may be considered in which the plate portion is removed and the plate-like bracket is directly connected to the outer surface of the case.
JP 2003-341348 A

しかしながら、特許文献１のように、空気取入口よりも空気の流通方向上流側に貫通孔を設ければ、フロントグリルを介して進入する雨や飛び石等の異物のうち、その進入方向が空気の流通方向に沿わないものは、貫通孔の内壁に衝突して空気取入口へ到達しにくくなる。このため、上記のように貫通孔を設けない場合、ガス検出装置の防水や異物に対する保護を適切に行えない場合がある。そこで、空気取入口の配置は変えず、ブラケット接続部を廃し、ケースの外側面に直接、厚みが比較的薄い板片から構成されたブラケットを設け、そのブラケットに貫通孔（通気孔）を設ける構成が考えられる。しかし、このようにブラケットに対して単純に通気孔を設けると、ブラケット自体の強度が低下してしまうため、振動負荷の大きい車体に取り付けて使用するには十分な強度を得られない虞があった。   However, as in Patent Document 1, if a through-hole is provided on the upstream side of the air flow direction with respect to the air intake, among the foreign matters such as rain and stepping stones that enter through the front grille, the entry direction is air. Those that do not follow the flow direction collide with the inner wall of the through hole and are difficult to reach the air intake. For this reason, when a through-hole is not provided as described above, the gas detection device may not be properly waterproofed or protected against foreign matter. Therefore, the arrangement of the air intake ports is not changed, the bracket connecting portion is eliminated, a bracket composed of a relatively thin plate piece is provided directly on the outer surface of the case, and a through hole (vent hole) is provided in the bracket. Configuration is conceivable. However, simply providing a vent hole in the bracket in this way will reduce the strength of the bracket itself, and there is a risk that sufficient strength cannot be obtained for mounting on a vehicle body with a large vibration load. It was.

本発明は、上記問題点を解決するためになされたものであり、ブラケットにケースのガス導入口に測定対象気体を導く通気孔を設けた場合にも、ブラケットの強度を良好に確保し、従来と比較して小型化を図ることができるガス検出装置を提供することを目的とする。   The present invention has been made to solve the above-described problems, and even when the bracket is provided with a vent hole that guides the gas to be measured to the gas inlet of the case, the strength of the bracket is ensured satisfactorily. An object of the present invention is to provide a gas detection device that can be reduced in size as compared with the above.

上記目的を達成するために、請求項１に係る発明のガス検出装置は、測定対象気体中の特定ガスの濃度変化を検出するガスセンサと、前記ガスセンサを収容すると共に、自身の内部に前記測定対象気体を導入するためのガス導入口を有するケースと、前記ケースの外側面の少なくとも一部から外側に向かって突出され、前記ケースを検出場所に取り付けるためのブラケットであって、板状をなすと共に、自身の板厚方向に沿って取付部材を挿通させるための取付孔が形成された板片部と、前記ケースの前記外側面と前記板片部とを連結し、前記板片部の板厚よりも肉厚に形成された補強部と、前記補強部の厚み方向に沿って開口され、前記ガス導入口に向けて前記測定対象気体を導くための通気孔とを含むブラケットとを備えている。   In order to achieve the above object, a gas detection device according to a first aspect of the present invention includes a gas sensor that detects a change in the concentration of a specific gas in a measurement target gas, the gas sensor, and the measurement target in its own interior. A case having a gas inlet for introducing gas, and a bracket that protrudes outward from at least a part of the outer surface of the case, and is a bracket for attaching the case to a detection location, and has a plate shape The plate piece part in which the attachment hole for inserting the attachment member along its own plate thickness direction is formed, and the outer side surface of the case and the plate piece part are connected, and the plate thickness of the plate piece part And a bracket including a reinforcing portion formed to be thicker and a vent hole that opens along the thickness direction of the reinforcing portion and guides the measurement target gas toward the gas inlet. .

また、請求項２に係る発明のガス検出装置は、請求項１に記載の発明の構成に加え、前記補強部は、その厚みが前記板片部との接続部分に向けて徐々に薄くなるように形成されていることを特徴とする。   Further, in the gas detector of the invention according to claim 2, in addition to the configuration of the invention according to claim 1, the reinforcing portion is formed so that the thickness thereof gradually decreases toward the connecting portion with the plate piece portion. It is characterized by being formed.

また、請求項３に係る発明のガス検出装置は、請求項１または２に記載の発明の構成に加え、前記ケースは、底壁と側壁とに囲まれて凹状をなし、前記ガスセンサを内部に収容する収容部を有するケース本体部と、前記ケース本体部に装着されると共に、前記収容部を閉塞する蓋部とを含み、前記ブラケットは、前記ケース本体部の前記側壁の前記外側面から突出しており、前記蓋部には、前記ブラケット側の突出方向に対して突出した膨出部を有し、前記膨出部のうちで、前記ブラケットに面する側には前記ガス導入口が形成される一方、前記ブラケットに面する側とは反対側の位置には、前記測定対象気体の流通を遮蔽する遮蔽壁が形成され、前記通気孔は、前記補強部のうち前記膨出部の前記ガス導入口に対向する位置に開口されていることを特徴とする。   According to a third aspect of the present invention, in addition to the configuration of the first or second aspect of the invention, the case has a concave shape surrounded by a bottom wall and a side wall, and the gas sensor is disposed inside. A case main body including a case main body and a lid that is attached to the case main body and closes the storage; and the bracket projects from the outer surface of the side wall of the case main body. The lid portion has a bulging portion protruding in the protruding direction on the bracket side, and the gas inlet is formed on a side of the bulging portion facing the bracket. On the other hand, a shielding wall that shields the flow of the measurement target gas is formed at a position opposite to the side facing the bracket, and the vent hole is formed of the gas in the bulging portion of the reinforcing portion. Opened at a position facing the inlet I am characterized in.

請求項１に係る発明のガス検出装置では、ガスセンサが収容されたケースのガス導入口に向けて測定対象気体を導くための通気孔を、ケースとブラケットの板片部とを連結する肉厚に形成されたブラケットの補強部に、その厚み方向に沿って開口することで、厚みの薄い板片部に通気孔を設けることによる強度低下を招く虞がない。また、この通気孔をブラケットの補強部に開口することで、従来のようにブラケットとケースの外側面との間に通気孔を付与したブラケット接続部を設ける必要がなく、ブラケット接続部を廃することができる分、従来のものに比べてガス検出装置の小型化を図ることができる。また、通気孔は、ガス導入口に向けて測定対象気体を導く流路の一部として構成されるため、測定対象気体中に雨粒や飛び石等の異物が混ざった場合、それら異物がガス導入口に到達するにはその大半が通気孔を通過する必要が生ずる。このため、異物のうち、通気孔を通過できない大きさのものや、進行方向が通気孔の案内する方向と異なって通気孔の内面に衝突したものを、ガス導入口へ到達させにくくすることができ、ケース内に異物が進入する虞を低減することができる。   In the gas detection device according to the first aspect of the present invention, the ventilation hole for guiding the measurement target gas toward the gas inlet of the case in which the gas sensor is accommodated has a thickness that connects the case and the plate piece of the bracket. By opening the reinforcing portion of the formed bracket along the thickness direction, there is no possibility of causing a decrease in strength due to providing the air hole in the thin plate piece portion. In addition, by opening the ventilation hole in the reinforcing part of the bracket, there is no need to provide a bracket connection part provided with a ventilation hole between the bracket and the outer surface of the case as in the prior art, and the bracket connection part is eliminated. As a result, the gas detection device can be downsized as compared with the conventional one. In addition, since the vent hole is configured as a part of the flow path that guides the measurement target gas toward the gas introduction port, when foreign matter such as raindrops or stepping stones is mixed in the measurement target gas, the foreign matter is removed from the gas introduction port. Most of it will need to pass through the vents to reach. For this reason, it is difficult to make foreign substances that do not pass through the vent hole or foreign objects that collide with the inner surface of the vent hole different from the direction in which the vent hole guides reach the gas inlet. It is possible to reduce the possibility of foreign matter entering the case.

また、補強部の構造として、請求項２に係る発明のガス検出装置のように、その厚みが板片部との接続部分に向けて徐々に薄くなる構造を有すれば、補強部を構成する材料の使用を低減しつつ十分な強度を得ることができるので、ガス検出装置の低コスト化を図ることができる。   Further, as the structure of the reinforcing portion, the reinforcing portion is configured if the thickness gradually decreases toward the connecting portion with the plate piece portion as in the gas detection device of the invention according to claim 2. Since sufficient strength can be obtained while reducing the use of materials, the cost of the gas detection device can be reduced.

また、請求項３に係る発明のガス検出装置では、ケースの蓋部に有する膨出部にガス導入口を形成し、通気孔をその膨出部のガス導入口に対向する位置に設けたことで、通気孔を通過した測定対象気体が膨出部のガス導入口を通り遮蔽壁に衝突してケース内に導かれる流路を形成することができる。これにより、より積極的に、測定対象気体を通気孔を介してケース内に進入させることができるので、ケース内における測定対象気体の交換を早め、ガスセンサの応答性を高くすることができる。   In the gas detector of the invention according to claim 3, the gas inlet is formed in the bulging portion of the lid portion of the case, and the air vent is provided at a position facing the gas inlet of the bulging portion. Thus, it is possible to form a flow path in which the measurement target gas that has passed through the vent hole passes through the gas inlet of the bulging portion and collides with the shielding wall to be guided into the case. As a result, the measurement target gas can be more actively entered into the case through the vent hole, so that the exchange of the measurement target gas in the case can be accelerated and the responsiveness of the gas sensor can be increased.

以下、本発明のガス検出装置の一実施の形態であるガス検出装置１を、図面を参照して説明する。ガス検出装置１はガスセンサ１００（図４参照）を内蔵し、測定対象気体中の特定ガスの濃度変化を検出するものである。このガス検出装置１は、自動車のフロントグリル（図示外）の内側に設置され、自動車の走行に伴いフロントグリルを介し車体内に入り込む空気中に含まれる特定ガスの濃度変化を検出するものであり、このガス検出装置１の検出結果は、換気装置の外気導入、内気循環を選択するために用いられる。   Hereinafter, a gas detection device 1 which is an embodiment of a gas detection device of the present invention will be described with reference to the drawings. The gas detection device 1 includes a gas sensor 100 (see FIG. 4), and detects a change in the concentration of a specific gas in the measurement target gas. The gas detection device 1 is installed inside a front grill (not shown) of an automobile and detects a change in the concentration of a specific gas contained in the air that enters the vehicle body through the front grill as the automobile travels. The detection result of the gas detection device 1 is used to select outside air introduction and inside air circulation of the ventilation device.

まず、本実施の形態のガス検出装置１の構成について、図１〜図９を参照して説明する。図１は、ガス検出装置１を平面、背面および左側面から見た斜視図である。図２は、ガス検出装置１の正面図である。図３は、ガス検出装置１の背面図である。図４は、図３の一点鎖線Ａ−Ａにおいて底面側から見たガス検出装置１の断面図である。図５は、図３の一点鎖線Ｂ−Ｂにおいて右側面側から見たガス検出装置１の断面図である。図６は、ガス検出装置１の左側面図である。図７は、ガス検出装置１の平面図である。図８は、ガス検出装置１の右側面図である。図９は、ガス検出装置１のケース部２を展開し、ケース本体部６、内蓋５および外蓋４をそれぞれ背面側から見た図である。   First, the structure of the gas detection apparatus 1 of this Embodiment is demonstrated with reference to FIGS. FIG. 1 is a perspective view of the gas detection device 1 as seen from the top, back, and left side. FIG. 2 is a front view of the gas detection device 1. FIG. 3 is a rear view of the gas detection device 1. FIG. 4 is a cross-sectional view of the gas detection device 1 as viewed from the bottom side along the one-dot chain line AA in FIG. FIG. 5 is a cross-sectional view of the gas detection device 1 viewed from the right side surface along the one-dot chain line BB in FIG. 3. FIG. 6 is a left side view of the gas detection device 1. FIG. 7 is a plan view of the gas detection device 1. FIG. 8 is a right side view of the gas detection device 1. FIG. 9 is a view in which the case portion 2 of the gas detection device 1 is expanded and the case main body portion 6, the inner lid 5 and the outer lid 4 are viewed from the back side.

なお、ガス検出装置１が自動車に取り付けられた際に、略直方体形状のケース部２を基準として、自動車の進行方向前方側をガス検出装置１の前面側、天地方向上方側をガス検出装置１の上面側として説明する。具体的には、図１に示す、ケース本体部６に対し蓋部３が設けられた側が背面側であり、ブラケット部７が形成された側が上面側となる。   When the gas detection device 1 is attached to the automobile, the front side of the vehicle in the traveling direction is the front side of the gas detection device 1 and the upper side in the vertical direction is the gas detection device 1 with the substantially rectangular parallelepiped case portion 2 as a reference. The upper surface side will be described. Specifically, the side where the lid 3 is provided with respect to the case body 6 shown in FIG. 1 is the back side, and the side where the bracket 7 is formed is the top side.

図１に示す、本実施の形態のガス検出装置１は、外蓋４および内蓋５からなる蓋部３とケース本体部６とからなる略直方体形状のケース部２の左側面側にコネクタ部９が設けられ、ケース本体部６の外側面にブラケット部７が連結されている。ガスセンサ１００（図４参照）は、ケース本体部６の収容部６０（図４参照）内に収容されている。このガス検出装置１は、自動車のフロントグリルの内側（後部）に、図２の正面図および図３の背面図に示すように、ケース本体部６の側壁６１のうち、ブラケット部７の設けられた側の側壁６１（図５参照）を鉛直方向上方に、コネクタ部９が設けられた側の側壁６１（図４参照）を、自動車の前方から見て左側となるようにして取り付けられる。その際にはブラケット部７の板片部７１に開口された２つの取付孔７６を用いてねじ止めされる。なお、ケース部２が、本発明における「ケース」に相当する。   The gas detection device 1 according to the present embodiment shown in FIG. 1 has a connector portion on the left side of a substantially rectangular parallelepiped case portion 2 composed of a lid portion 3 composed of an outer lid 4 and an inner lid 5 and a case body portion 6. 9 is provided, and the bracket portion 7 is connected to the outer surface of the case main body portion 6. The gas sensor 100 (see FIG. 4) is housed in the housing portion 60 (see FIG. 4) of the case body 6. As shown in the front view of FIG. 2 and the rear view of FIG. 3, the gas detection device 1 is provided with a bracket portion 7 in the side wall 61 of the case body portion 6 on the inner side (rear part) of the front grill of the automobile. The side wall 61 (see FIG. 5) on the other side is attached vertically upward, and the side wall 61 (see FIG. 4) on which the connector portion 9 is provided is mounted on the left side when viewed from the front of the automobile. In that case, it is screwed using two mounting holes 76 opened in the plate piece portion 71 of the bracket portion 7. The case portion 2 corresponds to a “case” in the present invention.

図４，図５，図９に示すように、ケース本体部６は、背面側から見て略矩形の底壁６２と、その外周に接続する側壁６１とで囲まれた断面略コの字型の収容部６０を有する。収容部６０は、底壁６２側をガス検出装置１の前面側とし、背面側は開放されている。その開放された背面側の側壁６１の縁端は外方に鍔状に突出する鍔部６３として形成され、鍔部６３の背面側から収容部６０の外縁を囲うように凹部６４が溝設されている。この凹部６４内にはゴム製のＯリング６６が係合されており、鍔部６３の外周にあわせ板状に形成された蓋部３と鍔部６３との間にＯリング６６が介在することによって、収容部６０が密閉されている。   As shown in FIGS. 4, 5, and 9, the case body 6 has a substantially U-shaped cross section surrounded by a substantially rectangular bottom wall 62 and a side wall 61 connected to the outer periphery of the case main body 6 when viewed from the back side. The housing portion 60 is provided. The accommodating part 60 makes the bottom wall 62 side the front side of the gas detection apparatus 1, and the back side is open | released. The edge of the opened rear side wall 61 is formed as a flange 63 projecting outward in a bowl shape, and a recess 64 is grooved from the back side of the flange 63 so as to surround the outer edge of the accommodating portion 60. ing. A rubber O-ring 66 is engaged in the concave portion 64, and the O-ring 66 is interposed between the lid portion 3 formed in a plate shape on the outer periphery of the flange portion 63 and the flange portion 63. Thus, the accommodating portion 60 is hermetically sealed.

収容部６０内にはガスセンサ１００を搭載した配線基板１１０が収容されており、マイクロコンピュータ、コンデンサ、抵抗など図示外の電子部品が搭載されている。この配線基板１１０は、底壁６２より収容部６０内に突設された２つの係止片６５により挟まれ位置決めされ、後述するリード部材１０５と半田付けされる。   A wiring board 110 on which the gas sensor 100 is mounted is housed in the housing portion 60, and electronic components (not shown) such as a microcomputer, a capacitor, and a resistor are mounted. The wiring board 110 is sandwiched and positioned by two locking pieces 65 protruding from the bottom wall 62 into the housing portion 60 and soldered to a lead member 105 described later.

ここで、ガスセンサ１００は、自動車の排気ガス、具体的には、ＮＯｘなどの酸化性ガス、及びＣＯ，ＨＣ（ハイドロカーボン）などの還元性ガスのいずれか、または両方の濃度変化を検知することができるガスセンサ素子１０１を、開口部１０２が形成されたセンサカバー１０３で包囲した構造を有している。   Here, the gas sensor 100 detects a change in the concentration of one or both of an exhaust gas of an automobile, specifically, an oxidizing gas such as NOx and a reducing gas such as CO and HC (hydrocarbon). The gas sensor element 101 is configured to be surrounded by a sensor cover 103 in which an opening 102 is formed.

このガスセンサ素子１０１の信号出力は配線基板１１０上の電子部品により処理され、目的とする特定ガス（酸化性ガス、還元性ガス）の濃度変化の情報としてリード部材１０５を通じて外部に出力される。図４に示すように、リード部材１０５は屈曲されており、一端側が配線基板１１０に半田付けされている。また、リード部材１０５の他端側は、ケース本体部６の左側面側の側壁６１から突設された筒状のコネクタ部９内に突出されている。図６に示すように、コネクタ部９は、側面視、角部がＲ面取りされた長方形状に形成されており、その長手方向に、３つのリード部材１０５の先端部が列設されている。コネクタ部９には、図示外の外部回路（例えばＥＣＵ）との電気的な接続を行うためのコネクタ（図示外）が接続される。   The signal output of the gas sensor element 101 is processed by electronic components on the wiring board 110 and output to the outside through the lead member 105 as information on the concentration change of the target specific gas (oxidizing gas, reducing gas). As shown in FIG. 4, the lead member 105 is bent and one end thereof is soldered to the wiring board 110. Further, the other end side of the lead member 105 protrudes into a cylindrical connector portion 9 that protrudes from the side wall 61 on the left side surface side of the case main body portion 6. As shown in FIG. 6, the connector portion 9 is formed in a rectangular shape having a chamfered corner when viewed from the side, and tip portions of three lead members 105 are arranged in the longitudinal direction. The connector unit 9 is connected to a connector (not shown) for electrical connection with an external circuit (eg, ECU) not shown.

次に、図５に示すように、ケース本体部６の上面側の側壁６１には、ブラケット部７が突設されている。図５〜図８に示すように、ブラケット部７は、板状の板片部７１と、板片部７１の板厚方向に厚みを有する補強部７５とから構成されている。板片部７１は、ケース本体部６の底壁６２（図５参照）を上面側の側壁６１より突出させた形態で、底壁６２と同一の平面を有し、底壁６２よりも肉厚に形成されている。補強部７５は、ケース本体部６の上面側の側壁６１と板片部７１との間に介在し両者を接続する形態で設けられており、その厚みが、板片部７１の厚み方向において、側壁６１から板片部７１に向けて（ガス検出装置１の上方向に向けて）徐々に薄くなるように構成されている。なお、ブラケット部７が、本発明における「ブラケット」に相当する。   Next, as shown in FIG. 5, the bracket portion 7 protrudes from the side wall 61 on the upper surface side of the case main body portion 6. As shown in FIGS. 5 to 8, the bracket portion 7 includes a plate-shaped plate piece portion 71 and a reinforcing portion 75 having a thickness in the plate thickness direction of the plate piece portion 71. The plate piece portion 71 is a form in which the bottom wall 62 (see FIG. 5) of the case main body portion 6 protrudes from the side wall 61 on the upper surface side, has the same plane as the bottom wall 62, and is thicker than the bottom wall 62. Is formed. The reinforcing portion 75 is provided between the side wall 61 on the upper surface side of the case main body portion 6 and the plate piece portion 71 and connected to each other, and the thickness thereof is in the thickness direction of the plate piece portion 71. It is comprised so that it may become thin gradually toward the board piece part 71 from the side wall 61 (toward upward direction of the gas detection apparatus 1). The bracket portion 7 corresponds to a “bracket” in the present invention.

また、図２に示すように、ブラケット部７の前面側には、略全面に、上下方向および左右方向において格子状となるようにブラケット部７の厚み方向に突設されたリブ７７が形成されている。そして補強部７５の右端側において形成されたリブ７７の間の部位の一部が開口され、図１，図２，図５，図７〜図９に示すように、補強部７５の厚み方向（ガス検出装置１の前後方向）に貫通する２つの通気孔８０が形成されている。   Further, as shown in FIG. 2, on the front surface side of the bracket portion 7, ribs 77 projecting in the thickness direction of the bracket portion 7 so as to form a lattice shape in the vertical direction and the left-right direction are formed on substantially the entire surface. ing. And a part of site | part between the ribs 77 formed in the right end side of the reinforcement part 75 is opened, and as shown to FIG.1, FIG.2, FIG.5 and FIG. Two vent holes 80 penetrating in the front-rear direction of the gas detector 1 are formed.

通気孔８０は、リブ７７とケース本体部６の上面側の側壁６１とで、ガス検出装置１の前方より通気孔８０内に入り込む空気を後方に案内する。この通気孔８０の後方には後述する蓋部３（具体的には、外蓋４）の膨出部４０が配置されており、空気が通気孔８０によって膨出部４０に向けて案内されるように、両者は位置決めされている。   The ventilation hole 80 guides the air that enters the ventilation hole 80 from the front of the gas detection device 1 to the rear by the rib 77 and the side wall 61 on the upper surface side of the case main body 6. A bulging portion 40 of the lid portion 3 (specifically, the outer lid 4), which will be described later, is disposed behind the vent hole 80, and air is guided toward the bulging portion 40 by the vent hole 80. Thus, both are positioned.

次に、図１に示すように、ケース本体部６の収容部６０の開放された背面側に配設される蓋部３は、図４，図５に示すように、外蓋４と内蓋５とから構成される。図４〜図９に示すように、内蓋５は、ケース本体部６の鍔部６３の外周形状にあわせた略矩形で厚みのある板状に形成され、鍔部６３の外周の各所に形成されたロック爪６７に、同様に内蓋５の外周の各所に突出して形成された係止爪５７が係合することにより、収容部６０が閉蓋される。このとき、収容部６０は、内蓋５と鍔部６３との間に介在されるＯリング６６によって密閉される。   Next, as shown in FIG. 1, the lid portion 3 disposed on the opened back side of the housing portion 60 of the case body portion 6 includes an outer lid 4 and an inner lid as shown in FIGS. 4 and 5. 5. As shown in FIGS. 4 to 9, the inner lid 5 is formed in a substantially rectangular and thick plate shape that matches the outer peripheral shape of the flange portion 63 of the case body 6, and is formed at various locations on the outer periphery of the flange portion 63. Similarly, the engaging claw 57 formed to project at various locations on the outer periphery of the inner lid 5 is engaged with the lock claw 67 thus closed, so that the accommodating portion 60 is closed. At this time, the accommodating portion 60 is sealed by an O-ring 66 interposed between the inner lid 5 and the flange portion 63.

図４，図５，図９に示すように、この内蓋５には、収容部６０内のガスセンサ１００のセンサカバー１０３の開口部１０２と前後方向に重なる位置に、開口部５１が穿孔されている。また内蓋５の収容部６０側の面には、この開口部５１を覆うように、空気などのガスは通すが水滴は通さない性質を有するフィルタ部材５２が貼設されている。これにより、ガスセンサ素子１０１に対し、センサカバー１０３の開口部１０２と内蓋５の開口部５１とを通じて空気などのガスを通気できるようになっている。   As shown in FIGS. 4, 5, and 9, an opening 51 is perforated in the inner lid 5 at a position overlapping the opening 102 of the sensor cover 103 of the gas sensor 100 in the housing 60 in the front-rear direction. Yes. A filter member 52 having a property of allowing gas such as air to pass but not allowing water droplets to pass therethrough is affixed to the surface of the inner lid 5 on the housing 60 side so as to cover the opening 51. Thereby, a gas such as air can be ventilated to the gas sensor element 101 through the opening 102 of the sensor cover 103 and the opening 51 of the inner lid 5.

さらに内蓋５には、空気の流路の一部をなす通気室５０を形成するため外蓋４が嵌められる。図４〜図９に示すように、外蓋４は、ガス検出装置１の背面側から見て内蓋５と同様な略矩形の板状に形成された天板４４を有し、その天板４４の縁部は側板４３として、一部を除きほぼ全周にわたって厚み方向に突設され、側板４３と天板４４とで凹部が形成されている。そして、内蓋５の外周の左右側側面に形成されたロック爪５８に、側板４３の同様の箇所に突出して形成された係止爪４８が係合することにより、外蓋４は内蓋５に係止されている。このとき、側板４３の開口側の端部は内蓋５に当接されている。これにより、外蓋４の側板４３と天板４４とからなる凹部と、内蓋５とで、通気室５０としての空間が構成される。なお、側板４３の上下側側面には、内蓋５の上下側側面に当接して外蓋４の位置決めをするための位置決片４７が設けられている。   Further, the outer lid 4 is fitted to the inner lid 5 in order to form a ventilation chamber 50 that forms part of the air flow path. As shown in FIGS. 4 to 9, the outer lid 4 has a top plate 44 formed in a substantially rectangular plate shape similar to the inner lid 5 when viewed from the back side of the gas detection device 1. An edge of 44 is provided as a side plate 43 so as to protrude in the thickness direction over almost the entire circumference except for a part thereof, and a recess is formed by the side plate 43 and the top plate 44. Then, when the locking claws 58 formed on the left and right side surfaces of the outer periphery of the inner lid 5 are engaged with the locking claws 48 formed to protrude from the same portion of the side plate 43, the outer lid 4 is moved to the inner lid 5. It is locked to. At this time, the end of the side plate 43 on the opening side is in contact with the inner lid 5. As a result, the concave portion formed by the side plate 43 and the top plate 44 of the outer lid 4 and the inner lid 5 form a space as the ventilation chamber 50. A positioning piece 47 for positioning the outer lid 4 by contacting the upper and lower side surfaces of the inner lid 5 is provided on the upper and lower side surfaces of the side plate 43.

また、図３，図９に示すように、外蓋４の右側上部（図３における左上の部位）は、ガス検出装置１の上方向に突出する膨出部４０として形成されている。膨出部４０では、外蓋４の側板４３が膨出側板４１として略コの字型に突出されており、その形状にあわせ、天板４４の対応する部位が膨出天板４２として略矩形に突出されている。膨出部４０の形成部位において側板４３は形成されておらず、図５に示すように、膨出部４０のうちブラケット部７に面する部位が、外気と通気室５０とを連通するガス取入口５３として構成される。こうした構成において、側板４３と天板４４とで構成される凹部は、膨出部４０の膨出側板４１と膨出天板４２とで構成される凹部に連続している。すなわち、膨出部４０は、膨出側板４１の開口側の端部である縁端部５６側から外気を取り込み、膨出天板４２および膨出側板４１とで構成される凹部によって取り込んだ空気を通気室５０へと案内する案内通路として機能する。なお、ガス取入口５３が、本発明の請求項１における「ガス導入口」に相当する。また、膨出天板４２が、本発明における「遮蔽壁」に相当する。   As shown in FIGS. 3 and 9, the upper right portion (upper left portion in FIG. 3) of the outer lid 4 is formed as a bulging portion 40 that protrudes upward in the gas detection device 1. In the bulging portion 40, the side plate 43 of the outer lid 4 protrudes in a substantially U shape as the bulging side plate 41, and the corresponding part of the top plate 44 is substantially rectangular as the bulging top plate 42 according to its shape. Is protruding. The side plate 43 is not formed at the portion where the bulging portion 40 is formed. As shown in FIG. 5, the portion of the bulging portion 40 facing the bracket portion 7 communicates with the gas that communicates the outside air with the ventilation chamber 50. Configured as an inlet 53. In such a configuration, the concave portion constituted by the side plate 43 and the top plate 44 is continuous with the concave portion constituted by the bulging side plate 41 and the bulging top plate 42 of the bulging portion 40. That is, the bulging portion 40 takes in outside air from the edge end portion 56 side, which is the opening side end portion of the bulging side plate 41, and the air taken in by the concave portion constituted by the bulging top plate 42 and the bulging side plate 41. Functions as a guide passage for guiding the air to the ventilation chamber 50. The gas inlet 53 corresponds to a “gas inlet” in claim 1 of the present invention. Further, the bulging top plate 42 corresponds to a “shielding wall” in the present invention.

図１，図２，図５，図７に示すように、この膨出部４０は、ガス検出装置１の前後方向において、ブラケット部７（補強部７５）に形成された通気孔８０に対向する位置に設けられている。そして膨出天板４２は、通気孔８０によりその内部を通過する空気が案内される方向（ガス検出装置１の前後方向）と直交する平面を有し、通気孔８０を通過した空気がガス検出装置１の後方に流れるのを遮蔽し、通気室５０に取り込まれるように機能している。   As shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 7, the bulging portion 40 faces the vent hole 80 formed in the bracket portion 7 (reinforcing portion 75) in the front-rear direction of the gas detection device 1. In the position. The bulging top plate 42 has a plane perpendicular to the direction in which air passing through the vent hole 80 is guided (front-rear direction of the gas detection device 1), and the air passing through the vent hole 80 detects gas. It functions to shield the flow behind the apparatus 1 and to be taken into the vent chamber 50.

一方、図１，図３，図９に示すように、外蓋４の右側下部（図３における左下の部位）の側板４３も形成されておらず、図５に示すように、この部位が、外気と通気室５０とを連通するガス排出口５４として構成される。さらに、図１，図４，図５，図９に示すように、外蓋４の天板４４の面で、ガス検出装置１の前方側の面のうち、左右方向中央より右手側の部位には、側板４３と同様の遮蔽突起４５，４６がそれぞれ左右方向に延設されている。この遮蔽突起４５，４６は、右手側に向けて互いに近づくように配置されており、側板４３とは連続していない。外蓋４と内蓋５とが互いに嵌められた状態では、遮蔽突起４５と遮蔽突起４６との間の位置で、ガス取入口５３から見た場合には遮蔽突起４５により隠され、ガス排出口５４から見た場合には遮蔽突起４６により隠される位置に、内蓋５の開口部５１が配置されている。   On the other hand, as shown in FIGS. 1, 3, and 9, the side plate 43 of the lower right portion (lower left portion in FIG. 3) of the outer lid 4 is not formed, and as shown in FIG. A gas discharge port 54 that communicates the outside air with the ventilation chamber 50 is configured. Further, as shown in FIGS. 1, 4, 5, and 9, on the surface of the top plate 44 of the outer lid 4, the front surface of the gas detection device 1 is positioned on the right hand side of the center in the left-right direction. Are respectively provided with shielding projections 45 and 46 similar to the side plate 43 in the left-right direction. The shielding protrusions 45 and 46 are arranged so as to approach each other toward the right hand side, and are not continuous with the side plate 43. In a state where the outer lid 4 and the inner lid 5 are fitted to each other, at a position between the shielding projection 45 and the shielding projection 46, when viewed from the gas intake port 53, the outer lid 4 and the inner lid 5 are concealed by the shielding projection 45. When viewed from 54, the opening 51 of the inner lid 5 is disposed at a position hidden by the shielding protrusion 46.

次に、このような構成を有するガス検出装置１によってガス検出が行われる際の動作について説明する。前述したように、ガス検出装置１は、自動車のフロントグリルの内側に取り付けられる。自動車の走行に伴い、フロントグリルを介して車体内に取り込まれた空気は、ガス検出装置１の前方より前面（図２に示す側の面）に衝突し、上下左右の縁からガス検出装置１の後方に流れる。このとき、図１，図５，図７に示すように、通気孔８０の正面に位置する空気は、流路ＡＦで示すように、そのまま通気孔８０内を通過して、ブラケット部７よりも後方側に流れる。   Next, an operation when gas detection is performed by the gas detection device 1 having such a configuration will be described. As described above, the gas detection device 1 is attached to the inside of the front grill of the automobile. As the automobile travels, the air taken into the vehicle body through the front grill collides with the front surface (the surface on the side shown in FIG. 2) from the front of the gas detection device 1, and the gas detection device 1 from the top, bottom, left and right edges. Flowing backwards. At this time, as shown in FIGS. 1, 5, and 7, the air located in front of the air hole 80 passes through the air hole 80 as it is, as shown by the flow path AF, and is more than the bracket portion 7. Flows backward.

ところで、雨粒や飛び石等の異物が空気に混ざっていた場合、通気孔８０を通過できなかったり通気孔８０の内面、すなわち、リブ７７やケース本体部６の側壁６１に衝突して付着したりすることで、通気孔８０の後方への異物の通過は規制される。   By the way, when foreign matter such as raindrops or stepping stones is mixed in the air, it cannot pass through the vent hole 80 or collides with and adheres to the inner surface of the vent hole 80, that is, the rib 77 or the side wall 61 of the case body 6. Thus, the passage of foreign matters to the rear of the vent hole 80 is restricted.

そして、通気孔８０を通過し、その後方側に位置する外蓋４の膨出部４０に到達した空気は、膨出側板４１の縁端部５６から膨出側板４１で囲まれた部分（すなわち、ガス取入口５３）に進入し、膨出天板４２に衝突する。すると空気は、流路方向前方を膨出天板４２に遮蔽され、その流路方向と直交する方向のうち三方を膨出側板４１に囲まれた状態となり、流路ＡＦが通気室５０に向かう方向へと案内される。   The air that has passed through the vent hole 80 and has reached the bulging portion 40 of the outer lid 4 located on the rear side thereof is a portion surrounded by the bulging side plate 41 from the edge end portion 56 of the bulging side plate 41 (that is, , Enters the gas inlet 53) and collides with the bulging top plate 42. Then, the air is shielded in front of the flow path direction by the bulging top plate 42, and is in a state surrounded by the bulging side plate 41 in three directions orthogonal to the flow path direction, and the flow path AF is directed to the vent chamber 50. Guided in the direction.

通気室５０内において、空気はガス排出口５４（開口部５１）に向けて進もうとするが、遮蔽突起４５に妨げられ、遮蔽突起４５の両端を迂回する方向に流路ＡＦが変更される。そして、遮蔽突起４５を回り込んだ空気は開口部５１より内蓋５を通過して、開口部１０２を通ってセンサカバー１０３内のガスセンサ素子１０１に達する。空気中に含まれる目的とする特定ガス（酸化性ガス、還元性ガス）の濃度変化に基づいてガスセンサ素子１０１から出力される信号出力は、配線基板１１０上の電子部品によって処理され、濃度変化の情報として外部回路（ＥＣＵ等）に出力される。   In the ventilation chamber 50, air tends to travel toward the gas discharge port 54 (opening 51), but is blocked by the shielding protrusion 45, and the flow path AF is changed in a direction to bypass both ends of the shielding protrusion 45. . Then, the air that has entered the shielding protrusion 45 passes through the inner lid 5 through the opening 51, passes through the opening 102, and reaches the gas sensor element 101 in the sensor cover 103. The signal output output from the gas sensor element 101 based on the concentration change of the target specific gas (oxidizing gas, reducing gas) contained in the air is processed by the electronic components on the wiring board 110, and the concentration change Information is output to an external circuit (such as an ECU).

さらにガス取入口５３より通気室５０内に進入する空気によって、遮蔽突起４５，４６間の空気は押し出され、遮蔽突起４６を迂回してガス排出口５４へと向かう。このような流路ＡＦに従って通気室５０内を空気が流れることによって、ガスセンサ素子１０１の周囲の空気の交換がなされ、ガスセンサ素子１０１による特定ガスの濃度変化の検出が行われる。   Further, the air between the shielding projections 45 and 46 is pushed out by the air that enters the ventilation chamber 50 from the gas inlet 53, bypasses the shielding projection 46, and travels toward the gas outlet 54. When air flows in the ventilation chamber 50 according to such a flow path AF, the air around the gas sensor element 101 is exchanged, and the gas sensor element 101 detects a change in the concentration of the specific gas.

なお、本発明は、上記実施の形態に限られず、各種の変更が可能である。例えば、ブラケット部７の補強部７５に通気孔８０を２つ形成したが、１つであっても３つ以上であってもよい。また、本実施の形態では、ブラケット部７の補強部７５の膨出部４０に対向する位置に通気孔８０を形成したが、上記のように、リブ７７の構造を残す状態で、補強部７５の大部分に通気孔が開口されていてもよい。   The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, although the two ventilation holes 80 are formed in the reinforcement part 75 of the bracket part 7, it may be one or three or more. In the present embodiment, the vent hole 80 is formed at a position facing the bulging portion 40 of the reinforcing portion 75 of the bracket portion 7. However, as described above, the reinforcing portion 75 is left in a state where the structure of the rib 77 remains. Ventilation holes may be opened in the majority of these.

また、通気孔８０と膨出部４０との間にフード状の通路を設け、通気孔８０とガス取入口５３とを連結し、通気孔８０を通過した空気のみがガス取入口５３よりケース部２内に進入できるようにしてもよい。また、通気孔８０にフィルタを設け、より確実に、雨粒や飛び石等の異物を除去できる構成としてもよい。   Further, a hood-shaped passage is provided between the vent hole 80 and the bulging portion 40, the vent hole 80 and the gas intake port 53 are connected, and only the air that has passed through the vent hole 80 is connected to the case portion from the gas intake port 53. 2 may be allowed to enter. Moreover, it is good also as a structure which can provide a filter in the vent hole 80 and can remove foreign matters, such as raindrops and a stepping stone, more reliably.

本発明は、ケースのブラケットに通気孔を形成したガス検出装置に適用することができる。   The present invention can be applied to a gas detection device in which a ventilation hole is formed in a bracket of a case.

ガス検出装置１を平面、背面および左側面から見た斜視図である。It is the perspective view which looked at the gas detection apparatus 1 from the plane, the back surface, and the left side surface. ガス検出装置１の正面図である。1 is a front view of a gas detection device 1. FIG. ガス検出装置１の背面図である。2 is a rear view of the gas detection device 1. FIG. 図３の一点鎖線Ａ−Ａにおいて底面側から見たガス検出装置１の断面図である。It is sectional drawing of the gas detection apparatus 1 seen from the bottom face side in the dashed-dotted line AA of FIG. 図３の一点鎖線Ｂ−Ｂにおいて右側面側から見たガス検出装置１の断面図である。It is sectional drawing of the gas detection apparatus 1 seen from the right side surface in the dashed-dotted line BB of FIG. ガス検出装置１の左側面図である。2 is a left side view of the gas detection device 1. FIG. ガス検出装置１の平面図である。1 is a plan view of a gas detection device 1. FIG. ガス検出装置１の右側面図である。2 is a right side view of the gas detection device 1. FIG. ガス検出装置１のケース部２を展開し、ケース本体部６、内蓋５および外蓋４をそれぞれ背面側から見た図である。It is the figure which expanded the case part 2 of the gas detection apparatus 1, and looked at the case main-body part 6, the inner cover 5, and the outer cover 4 from the back side.

符号の説明Explanation of symbols

１ ガス検出装置
２ ケース部
３ 蓋部
６ ケース本体部
７ ブラケット部
４０ 膨出部
４２ 膨出天板
５３ ガス取入口
５６ 縁端部
６０ 収容部
６１ 側壁
６２ 底壁
７１ 板片部
７５ 補強部
７６ 取付孔
８０ 通気孔
１００ ガスセンサ DESCRIPTION OF SYMBOLS 1 Gas detection apparatus 2 Case part 3 Cover part 6 Case main-body part 7 Bracket part 40 Expansion part 42 Expansion top plate 53 Gas inlet 56 Edge edge part 60 Receiving part 61 Side wall 62 Bottom wall 71 Plate piece part 75 Reinforcement part 76 Mounting hole 80 Ventilation hole 100 Gas sensor

Claims (3)

測定対象気体中の特定ガスの濃度変化を検出するガスセンサと、
前記ガスセンサを収容すると共に、自身の内部に前記測定対象気体を導入するためのガス導入口を有するケースと、
前記ケースの外側面の少なくとも一部から外側に向かって突出され、前記ケースを検出場所に取り付けるためのブラケットであって、
板状をなすと共に、自身の板厚方向に沿って取付部材を挿通させるための取付孔が形成された板片部と、前記ケースの前記外側面と前記板片部とを連結し、前記板片部の板厚よりも肉厚に形成された補強部と、前記補強部の厚み方向に沿って開口され、前記ガス導入口に向けて前記測定対象気体を導くための通気孔とを含むブラケットと
を備えたことを特徴とするガス検出装置。 A gas sensor for detecting a concentration change of a specific gas in the measurement target gas;
While housing the gas sensor, a case having a gas inlet for introducing the measurement object gas into itself;
A bracket that protrudes outwardly from at least a portion of the outer surface of the case, and for attaching the case to a detection location;
The plate piece portion having a plate shape and having an attachment hole for inserting the attachment member along the plate thickness direction thereof, and the outer side surface of the case and the plate piece portion are connected, and the plate A bracket including a reinforcing portion formed thicker than a plate thickness of the one portion, and a vent hole that opens along the thickness direction of the reinforcing portion and guides the measurement target gas toward the gas introduction port And a gas detection device. 前記補強部は、その厚みが前記板片部との接続部分に向けて徐々に薄くなるように形成されていることを特徴とする請求項１に記載のガス検出装置。   The gas detection device according to claim 1, wherein the reinforcing portion is formed so that the thickness thereof gradually decreases toward a connection portion with the plate piece portion. 前記ケースは、底壁と側壁とに囲まれて凹状をなし、前記ガスセンサを内部に収容する収容部を有するケース本体部と、前記ケース本体部に装着されると共に、前記収容部を閉塞する蓋部とを含み、
前記ブラケットは、前記ケース本体部の前記側壁の前記外側面から突出しており、
前記蓋部には、前記ブラケット側の突出方向に対して突出した膨出部を有し、前記膨出部のうちで、前記ブラケットに面する側には前記ガス導入口が形成される一方、前記ブラケットに面する側とは反対側の位置には、前記測定対象気体の流通を遮蔽する遮蔽壁が形成され、
前記通気孔は、前記補強部のうち前記膨出部の前記ガス導入口に対向する位置に開口されていることを特徴とする請求項１または２に記載のガス検出装置。
The case is formed in a concave shape surrounded by a bottom wall and a side wall, and has a case main body portion having a housing portion for housing the gas sensor therein, and a lid that is attached to the case main body portion and closes the housing portion. Including
The bracket protrudes from the outer surface of the side wall of the case body,
The lid portion has a bulging portion protruding with respect to the protruding direction on the bracket side, and the gas inlet is formed on the side of the bulging portion facing the bracket, A shield wall that shields the flow of the measurement target gas is formed at a position opposite to the side facing the bracket,
The gas detection device according to claim 1, wherein the vent hole is opened at a position facing the gas introduction port of the bulging portion of the reinforcing portion.
JP2005256965A 2005-09-05 2005-09-05 Gas detector Expired - Fee Related JP4728071B2 (en)

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JP2013024612A (en) * 2011-07-16 2013-02-04 Ngk Spark Plug Co Ltd Gas sensor
JP2016090108A (en) * 2014-10-31 2016-05-23 ダイキン工業株式会社 Air conditioner
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EP3901530A1 (en) * 2020-04-24 2021-10-27 Daikin Industries, Ltd. Refrigerant leakage detection sensor for a heat pump and air conditioning apparatus including same
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JPH08192617A (en) * 1994-11-17 1996-07-30 Nippondenso Co Ltd Vehicular gas detection device
JPH09274003A (en) * 1996-04-08 1997-10-21 Denso Corp Gas detector
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010054355A (en) * 2008-08-28 2010-03-11 Yazaki Corp Gas sensor
JP2013024612A (en) * 2011-07-16 2013-02-04 Ngk Spark Plug Co Ltd Gas sensor
JP2016090108A (en) * 2014-10-31 2016-05-23 ダイキン工業株式会社 Air conditioner
WO2018020848A1 (en) * 2016-07-29 2018-02-01 日産自動車株式会社 Gas detection device
EP3901530A1 (en) * 2020-04-24 2021-10-27 Daikin Industries, Ltd. Refrigerant leakage detection sensor for a heat pump and air conditioning apparatus including same
WO2021215526A1 (en) * 2020-04-24 2021-10-28 Daikin Industries, Ltd. Refrigerant leakage detection sensor for a heat pump and air conditioning apparatus including same
KR20220039960A (en) * 2020-09-22 2022-03-30 변춘권 Window control method and Window system
KR102451976B1 (en) * 2020-09-22 2022-10-11 변춘권 Window control method and Window system

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