WO2004111627A1 - 自動車用ガス検出装置 - Google Patents
自動車用ガス検出装置 Download PDFInfo
- Publication number
- WO2004111627A1 WO2004111627A1 PCT/JP2003/007512 JP0307512W WO2004111627A1 WO 2004111627 A1 WO2004111627 A1 WO 2004111627A1 JP 0307512 W JP0307512 W JP 0307512W WO 2004111627 A1 WO2004111627 A1 WO 2004111627A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- gas
- body case
- cover
- main body
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
Definitions
- the present invention relates to a gas detection device for an automobile, which is attached to an automobile to detect a gas concentration in outside air.
- an automobile gas detection device for detecting the concentration of exhaust gas in the outside air is used. If the exhaust gas in the outside air is detected at a low concentration by the gas detection device for an automobile, the outside air is detected. There is a system that selects the introduction mode and automatically switches to the inside air circulation mode when the exhaust gas exceeds the specified concentration.
- Japanese Patent Application Laid-Open No. Hei 9-184 817 proposes a structure in which a complicated air passage is provided to bypass the outside air and then hit the gas sensor.
- the detouring can provide the heat insulation effect between the inside and the outside, the outside air itself cannot directly obtain the effect of preventing the influence of the air volume because the main flow directly hits the gas sensor.
- molding is difficult because a special shape having a shape is required. Disclosure of the invention
- an automobile gas detection device has a gas sensor for detecting a predetermined gas contained in the outside air and a sensor arrangement hole for disposing the gas sensor, which is opened on an outer surface.
- An air introduction hole drilled toward the body case side is provided in a predetermined area surrounding the area.
- the vehicle gas detection device of the present invention is installed at a predetermined position in a vehicle, the outside air hitting the sensor cover flows into the inside of the sensor cover through the air introduction hole. Is formed in the sensor cover so as to avoid the facing area located directly in front of the sensor arrangement hole, so that the main flow of the outside air does not directly hit the gas sensor installed in the sensor arrangement hole.
- the amount of outside air that reaches is kept substantially constant regardless of the amount of air that hits the sensor power par, preventing the amount of outside air from affecting the detection value of the gas sensor. Also, for example, even when a sharp object enters the sensor cover through the air introduction hole, the object is prevented from breaking through the filter and into the sensor arrangement hole.
- an automobile gas detection device having a quick gas response and sufficiently preventing a detection value from being affected by the airflow of outside air, with the simple structure as described above.
- the above-mentioned automotive gas detection device is provided with a protruding piece having a tip protruding from a region inside a predetermined region where an air introduction hole is formed in the inner surface of the sensor cover so that a tip thereof hits the filter. It is also preferable to do so. Since the convex piece presses and holds the filter to the main body case by mounting the sensor cover, If the sensor cover is removed, the filter can be easily replaced from the front side. In addition, since the above-mentioned convex piece partitions the space between the sensor cover and the main body case and forms an air passage between the air introduction hole and the sensor arrangement hole, such a convex piece is provided. With this simple structure, it is possible to more reliably prevent the external air flow from affecting the detection value of the gas sensor.
- the above-mentioned gas detecting device for a vehicle is provided with a drainage hole formed in the sensor cover. By doing so, it is possible to prevent water from accumulating in the sensor cover.
- the above-mentioned gas detecting device for an automobile is provided with attaching / detaching means for holding the sensor cover to the main body case in a sexual manner. By doing so, it is possible to easily replace the filter by attaching and detaching the sensor force par, and it is possible to easily perform maintenance on site.
- FIG. 1 is an exploded view of an example of a vehicle gas detection device according to an embodiment of the present invention.
- FIG. 2 is an assembly diagram of the above-described automotive gas detection device.
- FIG. 3 is a front view of an upper case of the gas detection device for an automobile according to the first embodiment.
- FIG. 4 is a side view of the upper case of the gas detection device for an automobile according to the first embodiment.
- FIG. 5 is a bottom view of the upper case of the gas detection device for an automobile in the above.
- FIG. 6 is a rear view of the upper case of the gas detection device for an automobile according to the first embodiment.
- FIG. 7 is a sectional view taken along line AA of FIG.
- FIG. 8 is a front view showing the lower case of the gas detection device for an automobile in the above.
- FIG. 9 is a bottom view showing the lower case of the gas detection device for g vehicles in the above.
- FIG. 10 is a rear view showing the lower case of the gas detector for an automobile in the above.
- FIG. 11 is a front view showing a sensor cover of the above-described automotive gas detection device.
- FIG. 12 is a rear view showing the sensor cover of the above-described automotive gas detection device.
- FIG. 13 is a sectional view taken along line BB of FIG.
- FIG. 14 is a cross-sectional view taken along the line C-C of FIG.
- FIG. 15 is a front view showing a state in which a filter and a sensor cover are attached to the upper case of the gas detection device for an automobile in the above.
- FIG. 16 is a bottom view showing a state in which a filter and a sensor cover are attached to the upper case of the gas detection device for an automobile in the above.
- FIG. 17 is a cross-sectional view taken along line DD of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- An example of a vehicle gas detection device 1 is disposed between a front grill of an automobile (not shown) and a lager night inside the front grill, for example. It detects the concentration of exhaust gas in the introduced outside air.
- an automotive gas detection device 1 of the present embodiment accommodates a printed circuit board 2 on which various components are mounted and a gas sensor 3 connected to the printed circuit board 2 on its outer surface.
- the main body of the outer shell is composed of the body case 4 exposed from 4a and the sensor cover 5 detachably attached to the outer surface 4a of the body case 4 so as to cover the exposed part of the gas sensor 3. .
- the gas sensor 3 is for detecting a predetermined gas (specifically, CO, NO 2, etc.) released into the outside air as exhaust gas.
- a predetermined gas specifically, CO, NO 2, etc.
- the gas sensor 3 is A pair of an exhaust gas detection sensor 3a for gasoline engine and an exhaust gas detection sensor 3b for diesel engine is provided, but not limited to this, and one or three or more sensors are provided. It may be something.
- the main body case 4 has a substantially box-shaped upper case 7 (see FIGS. 3 to 7) having an opening 6 on almost the entire rear side, and a lower case 7 that fits and closes the opening 6 of the upper case 7.
- the upper case 7 and the lower case 8 hold the printed circuit board 2 between the upper case 7 and the lower case 8 (see FIGS. 8 to 10).
- a connector connection section 9 into which a connector (not shown) is inserted and a sensor arrangement section 10 in which the gas sensor 3 is arranged are formed.
- the connector connection portion 9 is formed by recessing an elliptical cross section so as to open toward the side of the main body case 4, and an L-shaped connection terminal 11 is provided at one end 11 a.
- the sensor installation part 10 is formed in a trapezoidal shape by protruding one step higher on the front side of the main body case 4, and a central part of a substantially rectangular outer surface 10 a facing the front side is provided with a main body.
- a sensor arrangement hole 12 penetrating into the case 4 is formed.
- the opening direction of the sensor arrangement hole 12 is defined as the front direction of the vehicle gas detection device 1.
- the printed circuit board 2 is sandwiched between the upper case 7 and the lower case 8, and the main body case 4 is assembled, and then connected to the printed circuit board 2.
- the gas sensor 3 to be connected is arranged in the sensor arrangement hole 12 opened in the outer surface 4 a of the main body case 4, and the other end 1 1 b of the connection terminal 11 is connected to the printed circuit board 2. It has become.
- the sensor cover 5 has a cap shape formed by extending a side peripheral wall portion 5 b from the periphery of the main body portion 5 a having a substantially rectangular shape in a front view toward the back.
- the side wall 5b has a pair of recesses 13a formed by notching the leading edge thereof, and two pairs of recesses 13b similarly formed by cutting the leading edge into a narrow groove shape.
- the pair of concave portions 13b are provided adjacent to each other, and an engaged portion which is elastically deformable and has a hole 15 at the center portion is provided between adjacent concave portions 13b. Section 14 is protruding.
- a pair of claw-shaped engaging portions 16 are provided on the outer surface 10b of the sensor arrangement portion 10 of the main body case 4 so as to proactively engage with the holes 15 of the engaged portions 14.
- the engaged portion 14 and the engaging portion 16 form attaching / detaching means for holding the sensor cover 5 to the sensor disposing portion 10 of the main body case 4 in a natural manner.
- the sensor force bar 5 in the mounted state has the distal end edge of the side peripheral wall portion 5b pressed against the outer surface 4a of the main body case 4, and the concave portions 13a, 1 3 b and the air introduction hole 18 described later And seals the periphery of the sensor arrangement hole 12.
- a plurality of spacers 20 protrude from the outer surface 10 b of the sensor disposition portion 10, and the inner surface of the side peripheral wall portion 5 b of the sensor cover 5 is provided at the tip of the sensor 20.
- the gap between the inner surface of the side peripheral wall portion 5b of the sensor cover 5 and the outer surface 10b of the sensor installation portion 10 is kept constant when the sensor cover 5 is mounted. It is.
- the main portion 5a of the sensor cover 5 has a region facing the sensor placement hole 12 when the sensor cover 5 is mounted on the sensor placement portion 10 (that is, as shown in FIG. 1, FIG. 2, FIG. 11, and FIG. 12).
- Sensakaba one 5 is outside than the opposing region 1 ⁇ the sensor arrangement hole 1 2, and, than the predetermined area T 2 that the air inlet holes 1 8 is bored A plurality of convex pieces 19 are protruded at substantially equal intervals in a substantially ring-shaped region # 3 on the inner side.
- the filter 21 is attached to the main body case 4 in which the printed circuit board 2 is incorporated and the gas sensor 3 is disposed in the sensor arrangement hole 12 so as to cover the sensor arrangement hole 12 from the outer surface 4a side.
- a cap-shaped sensor cover 5 is attached to the sensor arrangement portion 10 of the main body case 4 so as to surround and cover the sensor arrangement hole 12 and the filter 21, so that the automobile Gas detector: L is to be assembled.
- the tips of the plurality of convex pieces 19 provided on the inner surface of the sensor cover 5 were attached so as to cover substantially the entire outer surface 10a on the front side of the sensor arrangement portion 10 of the main body case 4.
- the filter 21 hits the surface of the filter 21 (see Fig. 15 to Fig.
- the filter 21 is a highly water-repellent membrane sheet formed porous using, for example, PTFE (polytetrafluoroethylene).
- PTFE polytetrafluoroethylene
- the diameter of the pores in the membrane sheet is set to 1 to 5 m so as to allow gas to pass therethrough but prevent water and dust from passing therethrough, and particularly preferably 3 m.
- a polyester non-woven fabric for reinforcement is attached to the back side of the membrane sheet. It is preferable to keep it.
- the reason why the highly water-repellent membrane is provided on the front side of the polyester non-woven fabric is that if the polyester non-woven fabric is provided on the front side of the membrane sheet, This is because water adhering to the polyester nonwoven fabric may obstruct ventilation.
- the filter 21 is adhered to the main body case 4 via an adhesive.
- a bracket (not shown) is fixed to a mounting portion 22 protruding from the outer surface 4 a of the main body case 4, and outside air flows in through the bracket. It is installed so that it faces the front with respect to the incoming direction (that is, the opening direction of the sensor arrangement hole 12 is the direction in which outside air flows in), and the connector connection portion 9 opens downward.
- the main flow of outside air introduced from the front grill hits the outer surface of the main part 5a of the sensor cover 5, and after flowing into the inside of the sensor cover 5 through the plurality of air introduction holes 18 As indicated by the arrow in FIG.
- the sensor force par 5 passes through the gap between the inner surface of the side peripheral wall 5b of the sensor cover 5 and the outer surface 1Ob of the sensor placement portion 10 of the main body case 4.
- the liquid flows out of the sensor cover 5 from the recesses 13a and 13b formed at the tip of the side peripheral wall 5b.
- the air introduction hole 1 8 the sensor disposition hole 1 opposite region located 2 right in front T, the bored Sarezu, the body cover only in a predetermined region T 2 of the periphery of the counter area T i Since the hole is drilled toward the side 14, the main flow of the outside air goes to the side recesses 13 a and 13 b without directly hitting the sensor arrangement hole 12.
- the amount of outside air reaching the gas sensor 3 is kept substantially constant irrespective of the air flow, and thereby the influence of the outside air flow on the detection value of the gas sensor 3 is prevented.
- an air passage partitioned by a plurality of convex pieces 19 is formed between the air introduction hole 18 and the sensor arrangement hole 12. Therefore, the influence of the airflow of the outside air on the detection value of the gas sensor 3 is more reliably prevented.
- the air introduction hole 18 is formed in the body case 4 side so as to surround a region Tx facing the sensor arrangement hole 12 in a ring shape.
- outer surface 4a of body case 4 that is, sensor Is located close to the outer surface 10 a facing the front side of the sensor, so that the introduced outside air does not pass through a region where the main flow is largely separated from the sensor arrangement hole 12, and therefore the gas sensor 3. Quick gas response is ensured.
- each of the recesses 13a and 13b provided in the side peripheral wall portion 5b of the sensor cover 5 serves as an air outflow hole formed at the tip of the side peripheral wall portion 5b of the sensor cover 5.
- the one that opens downward during installation in particular, also serves as a drainage hole, which can cause water to accumulate in the sensor cover 5. Has been prevented.
- the sensor cover 5 integrally provided with the air introduction hole 18 and the convex piece 19 is attached to the main body case 4. With a simple structure that is simply installed, it can sufficiently prevent the detected value from being affected by the air volume of the outside air, while ensuring quick gas responsiveness. In addition, since the main flow of the outside air does not directly hit the sensor arrangement hole 12, adhesion of water and dust is reliably prevented. Also, in the automotive gas detection device 1 of the present example, the projection 19 that presses the filter 21 is also removed integrally by removing the sensor cover 5, so that the vehicle gas detection device 1 is mounted. If the sensor cover 5 is attached and detached as it is, there is an advantage that the filter 21 can be easily replaced from the front side. Industrial applicability
- the vehicle gas detection device of the present invention is provided with a simple configuration to sufficiently prevent the amount of outside air from affecting the detection value of the gas sensor. Since the detection value does not change depending on the speed and has quick gas responsiveness, the vehicle gas detection device of the present invention provides An auto air conditioner system that accurately detects the exhaust gas concentration at all times and appropriately switches between the outside air introduction mode and the inside air circulation mode according to the detected value can be realized at low cost. Further, the automotive gas of the present invention According to the detection device, the filter can be easily replaced from the front side by removing the sensor cover, so that an auto air conditioner system with easy maintenance can be realized. As described above, the gas detection device for automobiles of the present invention is preferably used for an auto air conditioner system, but can be widely used as gas detection means used for other systems. Even with this, it is possible to provide a gas detection means that is highly reliable and easy to maintain.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003242348A AU2003242348A1 (en) | 2003-06-12 | 2003-06-12 | Automobile gas detector |
PCT/JP2003/007512 WO2004111627A1 (ja) | 2003-06-12 | 2003-06-12 | 自動車用ガス検出装置 |
JP2005500757A JP4195466B2 (ja) | 2003-06-12 | 2003-06-12 | 自動車用ガス検出装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/007512 WO2004111627A1 (ja) | 2003-06-12 | 2003-06-12 | 自動車用ガス検出装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004111627A1 true WO2004111627A1 (ja) | 2004-12-23 |
Family
ID=33549010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007512 WO2004111627A1 (ja) | 2003-06-12 | 2003-06-12 | 自動車用ガス検出装置 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4195466B2 (ja) |
AU (1) | AU2003242348A1 (ja) |
WO (1) | WO2004111627A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006220544A (ja) * | 2005-02-10 | 2006-08-24 | Riken Keiki Co Ltd | フィルター複合体およびガス検知器 |
JP2007071604A (ja) * | 2005-09-05 | 2007-03-22 | Ngk Spark Plug Co Ltd | ガス検出装置 |
JP2012035656A (ja) * | 2010-08-03 | 2012-02-23 | Kubota Corp | 作業車の操向角検出装置 |
JP2014081367A (ja) * | 2012-09-25 | 2014-05-08 | Hokuriku Electric Ind Co Ltd | ガスセンサ |
JP2016180601A (ja) * | 2015-03-23 | 2016-10-13 | アルプス電気株式会社 | 湿度検知ユニット |
FR3073942A1 (fr) * | 2017-11-23 | 2019-05-24 | 42 Factory | Boitier de mesure de la qualite de l’air ambiant comportant des ouies d’entree d’air concues pour eviter l’introduction de la pluie, et module de mesure associe |
EP3943925A1 (en) * | 2020-07-20 | 2022-01-26 | TDK Corporation | Sensor module |
JP7471947B2 (ja) | 2020-08-01 | 2024-04-22 | Tdk株式会社 | センサーモジュール |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04123919A (ja) * | 1990-09-14 | 1992-04-23 | Zexel Corp | 車両用空調装置におけるガス検知装置 |
JPH08192617A (ja) * | 1994-11-17 | 1996-07-30 | Nippondenso Co Ltd | 車両用ガス検出装置 |
JP2000043546A (ja) * | 1998-07-28 | 2000-02-15 | Calsonic Corp | 車両用ガス検出装置 |
JP2000094943A (ja) * | 1998-09-28 | 2000-04-04 | Zexel Corp | 車両用ガス検出装置 |
JP2002318217A (ja) * | 2001-04-20 | 2002-10-31 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP2002318216A (ja) * | 2001-04-20 | 2002-10-31 | Ngk Spark Plug Co Ltd | ガスセンサ |
-
2003
- 2003-06-12 JP JP2005500757A patent/JP4195466B2/ja not_active Expired - Lifetime
- 2003-06-12 AU AU2003242348A patent/AU2003242348A1/en not_active Abandoned
- 2003-06-12 WO PCT/JP2003/007512 patent/WO2004111627A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04123919A (ja) * | 1990-09-14 | 1992-04-23 | Zexel Corp | 車両用空調装置におけるガス検知装置 |
JPH08192617A (ja) * | 1994-11-17 | 1996-07-30 | Nippondenso Co Ltd | 車両用ガス検出装置 |
JP2000043546A (ja) * | 1998-07-28 | 2000-02-15 | Calsonic Corp | 車両用ガス検出装置 |
JP2000094943A (ja) * | 1998-09-28 | 2000-04-04 | Zexel Corp | 車両用ガス検出装置 |
JP2002318217A (ja) * | 2001-04-20 | 2002-10-31 | Ngk Spark Plug Co Ltd | ガスセンサ |
JP2002318216A (ja) * | 2001-04-20 | 2002-10-31 | Ngk Spark Plug Co Ltd | ガスセンサ |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006220544A (ja) * | 2005-02-10 | 2006-08-24 | Riken Keiki Co Ltd | フィルター複合体およびガス検知器 |
JP4711395B2 (ja) * | 2005-02-10 | 2011-06-29 | 理研計器株式会社 | フィルター複合体およびガス検知器 |
JP2007071604A (ja) * | 2005-09-05 | 2007-03-22 | Ngk Spark Plug Co Ltd | ガス検出装置 |
JP4728071B2 (ja) * | 2005-09-05 | 2011-07-20 | 日本特殊陶業株式会社 | ガス検出装置 |
JP2012035656A (ja) * | 2010-08-03 | 2012-02-23 | Kubota Corp | 作業車の操向角検出装置 |
JP2014081367A (ja) * | 2012-09-25 | 2014-05-08 | Hokuriku Electric Ind Co Ltd | ガスセンサ |
JP2016180601A (ja) * | 2015-03-23 | 2016-10-13 | アルプス電気株式会社 | 湿度検知ユニット |
FR3073942A1 (fr) * | 2017-11-23 | 2019-05-24 | 42 Factory | Boitier de mesure de la qualite de l’air ambiant comportant des ouies d’entree d’air concues pour eviter l’introduction de la pluie, et module de mesure associe |
EP3943925A1 (en) * | 2020-07-20 | 2022-01-26 | TDK Corporation | Sensor module |
US11703491B2 (en) | 2020-07-20 | 2023-07-18 | Tdk Corporation | Sensor module |
JP7471947B2 (ja) | 2020-08-01 | 2024-04-22 | Tdk株式会社 | センサーモジュール |
Also Published As
Publication number | Publication date |
---|---|
JP4195466B2 (ja) | 2008-12-10 |
AU2003242348A1 (en) | 2005-01-04 |
JPWO2004111627A1 (ja) | 2006-10-12 |
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